Technical Bulletin CR1

8/12/2019 Technical Bulletin CR1

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Rotafix Ltd.

Rotafix House, AbercrafSwansea, SA9 1UR U.K.

Tel: +44 (0)1639 730481 Fax: +44 (0)1639 730858

e-mail: [email protected] website: www.rotafix.co.uk

ROTAFIX is a registered trade mark

TECHNICAL BULLETIN CR1

CONCRETE REPAIR GUIDE

SUMMARY OF FEATURES

solvent free products,safer to handle andapply

by using an epoxyprimer the risk of bondseparation andcracking-out of therepair is totallyeliminated

surface finish ideal forcoating and decoration

waterproof, providingfillets and joints thatmay be used inconjunction with mostmembranes andcoatings

fast application, nowaiting time betweenpriming and filling

can be applied to

damp surfaces


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When considering concrete repair work the followingpoints are important:

1. Establish the cause of the problem beforeconsidering the method of repair.

2. Repairs required special tools, mixers andtechniques to facilitate the total operation.

Seek advice from ROTAFIX before commencing theprogramme. We have more than 20 years experienceof concrete repair techniques.


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CONCRETE REPAIRSCARBONATION

The most common cause for the loss of alkalinity in concrete is through a process known ascarbonation. Carbon dioxide by way of carbonic acid reacts with the lime and other alkalinematerials in the cement and converts them to carbonates.

When this process takes place the pH of the concrete, which is normally 11-11.5 falls. Thealkaline passivation which is given to any reinforcing steel is lost corrosion can take place.

Carbonation involves reaction with carbon dioxide in moist air, it therefore proceeds from theouter surface towards the inside of the concrete. Rate of penetration depends on a number offactors. These include:

1. Atmospheric humidity.2. Concrete permeability.

Rate of penetration slows down naturally as it proceeds more deeply into the concrete.

Surface blemishes such as blow holes, honey-combing or cracking will enable carbonation toproceed at a greater rate than on smooth concrete.

Carbonation occurs most rapidly at an optimum humidity level of 50-75%. Below 50% moistfilms do not form and therefore no acid. Above 70% there is too much water. This preventspenetration of the carbon dioxide - it would be difficult to have carbonation in fully immersedconcrete.

It has been found that the depth of carbonation is very approximately proportional to the

square root of the time.(DEPTH = K x TIME)(Where K is a constant)

CARBONATION TESTING

Use of a chemical indicator to check carbonation is quite straightforward. The most commonlyused indicator is a solution of phenolphthalein in alcohol and/or water.

Phenolphthalein solution applied to fresh strongly alkaline concrete will turn pink. If thealkalinity has been lost the concrete will not turn pink. In practice it is essential that thephenolphthalein solution is applied to freshly exposed concrete. This can be carried out in 2ways, either:

1. Break a piece of concrete from the main area and spray the underlying surfaceimmediately.

Or2. Drill a hole into the concrete either at a given depth or in small increments.

Immediately after drilling the hole flush out the drillings with de-ionised water to avoidcontamination. Follow this immediately with a spray of phenolphthalein. There should be aclear mark indicating the difference between pink and concrete colour. The degree ofcarbonation can then be measured in millimetres.

VARIATIONS

Depth of carbonation will be found to vary on different parts of one concrete structure.Normally it will be less on areas exposed to heavy rain than on external but sheltered faces. Itis essential to test all elevations and situations on a concrete building surface in order tocorrelate a range of results and thereafter take the appropriate action.


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Page 1 of 6 2009 Rotafix (Northern) Limited

CONCRETE REPAIR GUIDE

1. Mark out all suspect areas indicated bycracking to the concrete and/or corrosionstains.

2. Hammer test all concrete suspected ofbeing included in 1 above.

3. Limit the area of individual repairs by cuttingregular shapes at the perimeter of the repairusing a small diamond bladed cutter. To avoidfeather edging the minimum depth of cutshould be 10mm into sound concrete.

4. Break out all loose and friable material, onlyuse mechanical tools where absolutelynecessary. In the case of narrow sectionssuch as posts and columns it is essential thatmechanical tools are not used as these maycause damage to hitherto sound concrete.


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5. After all loose material has been broken outinspect, in detail, both the underlying surfaceof the concrete and the exposed steel that isrevealed.

6. In areas where extensive rusting hasoccurred then it may be necessary tocontinue breaking out existing concretearound the remainder of the diameter of thesteel in order to expose any areas containingactive rust. Any removal of concrete shouldbe carried out using hand tools.

7. In areas where extra cutting has been carriedout reform the edge of the repair using thediamond disc technique identified in 3 above.

8. In the event that corroded tie wires may berevealed, these may be cut out completely. Inthe event that extensive corrosion and loss ofsection has occurred in the reinforcing steel,cut out the damaged steel.

9. Make provision for replacing the cut out steelby drilling the concrete and reinstating newsections of steel with ZEROSET ANCHORGROUT. Where low cover is anticipated itmay be advisable to carry out thereplacement with stainless steel.


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10. Clean the whole of the repair area,particularly that steel which remains andhas surface rust. The ideal method is gritblasting, alternatively a needle gun maybe used. Grinding of the steel andmechanical wire brushing are not ideal.

11. Prime the exposed steel with 1 good coat ofHR Slurry Primer, allowing 1 hour to dry.Ensure that the steel protective coating isapplied to the steel only and not to theconcrete.

12. Mix P12 2 part epoxy primer and apply tothe total repair area, including the previouslycoated steel. Application of P12 should beconsistent with the minimum quantityrequired conducive with overall wetting ofthe entire surface within the repair area.

13. Mix RENDACRETE LW with the correctamount of water as per the data sheet.

Alternatively if RM20 epoxy mortar is beingused, mix the 3 components as per the datasheet. In both cases the data sheets areprovided with the packs of material.


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14. Apply the RENDACRETE LW using acombination of trowels and floats, do notover trowel. Finish with a wood float DONOT spray or brush on extra water. WhenRM20 epoxy mortar is being used, useeither S200 PC Solvent or detergent andwater to clean the trowel prior to finishing.Use a steel float, do not apply solvent orwater to the RM20 surface.

15. In the event that there is reinforcing steelwithin the repair area it may be necessary touse a gloved hand to compact the RM20 orthe RENDACRETE LW around the fullcircumference of any steel. This is thenfollowed by the trowel technique describedabove.

16. Due to position, i.e. overhead or complexityof shape it may be necessary to useshuttering to support the RENDACRETELW or RM20 during its cure period. Ensurethat the shuttering is treated with a suitablerelease agent such as ROTAFIX RELEASEWAX.


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17. Ensure that any shuttering is firmly fixed tothe sound concrete surround in order thatthe profile is accurately maintained and thatthe RENDACRETE LW/RM20 may be firmlycompacted between the shuttering and theconcrete.

18. If there is any doubt about supporting therepair in one application, I.e. if slump islikely to occur during the application processor the cure time, then the repair mortarshould be installed in 2 or more operations.

19. All mortars should be applied whilst theprimer is still tacky.


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20. In the event that the primer cures before theapplication of the RENDACRETE LW orRM20, or the primed surface has been leftovernight, then a further application of P12PRIMER must be made prior to applicationof the mortar.

21. If the RENDACRETE LW or the RM20 isapplied in 2 or more layers, (see 18 above),then an interim primer coat of P12 must beapplied, it must be tacky when the new layerof mortar is applied.

22. The completed repair is now part of the totalconcrete structure and is now ready for aprotective treatment of either VINACHEM or

AQUACHEM anti carbonation coating.


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CLEANING SOLVENT

PRODUCT CODE: 3617 - 2 litre

DESCRIPTION: M ETHYL ETHYL KETONE supplied in liquid form. It is a clear highly flammableliquid.

PACKAGING: M ETHYL ETHYL KETONE is supplied in 2 litre screw capped containers nonreturnable.

PHYSICAL ANDCHEMICAL

PROPERTIES:

Physical state: LiquidColour: ColourlessOdour: Characteristic

Boiling point: 79 to 80.5Density: 804-806 at 20CVapour density: Heavier than airVapour pressure: 9500 at 20C (measured as N/m)Solubility: Complete solublepH Not availableFlash point: -4

Autoignition temperature: 515Lower explosion limit: 1.8 to 11.5Viscosity: 0.42 at 20C (mm/s)

SPECIFIC USES: M ETHYL ETHYL KETONE is used for the cleaning of containers and tools whichhave been used with and/or for the mixing of epoxy resins and theirassociated curing agents.

HEALTH ANDSAFETY:

When handling or using METHYL ETHYL KETONE chemical goggles (eyeprotection) should be worn to prevent accidental splashing of the eyes. Donot wear contact lenses. Should eye contact occur, wash thoroughly withwater for at least 15 minutes and obtain medical attention.

Hazardous in case of eye contact (irritant). Low order of acute toxicity. OralLD50 (rat) is greater than 2000mg/kg

Ingestion should be avoided.

TRANSPORTINFORMATION:

UN number 1193Class 3Packing group II

ADR/RID: Class 3

The information in this document is based on practical tests, but given without guarantee insomuch as methods ofuse by others is beyond our control. Due to continuing development and improvements, it may be necessary to change

without notice the material specification. All goods are sold subject to our Standard Conditions of Sale.

ROTAFIX, ROTAFIX HOUSE, ABERCRAF, SWANSEA SA9 1UR. U.K.TEL: +44 (0)1639 730481 FAX: +44 (0)1639 730858

e.mail: [email protected] Website: www.rot afix.co.uk

SOUTHERN AREA CONTACT:TEL: +44 (0)1442 243169 FAX: +44 (0)1442 234901

PD3617/9


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QU HEM PRODUCT CODE: 3001 - Red BS 04 D 45 3017 - Blue BS 18 E 51 3020 White

3008 - Grey BS 00 A 05 3018 - Green BS 14 E 53 3021 Black BS 00 E 533006 Blue BS 18 E 50 3019 - Magnolia BS08B15 3040 Primer 3042 Grey BS 00 A 05 (l Litre)

DESCRIPTION: AQUACHEM is a series of water miscible, 2-pack, epoxy coating systems. AQUACHEM systemscontain no solvents and therefore the Health and Fire hazards are minimised. AQUACHEM isindependently tested to BS 6920. It is therefore suitable for coating any containers holdingpotable water. Cured AQUACHEM is non toxic to aquatic life and is suitable for fish farmingequipment and tanks.

SPECIFIC USES: 1. Surface membranes.2. Skid resistant surface for bridges and ramps.3. Decorative Floor Coating4. Hygienic coating for Food/Dairy/Factories/Warehouses and Workshop areas.

PACKAGING: A standard AQUACHEM pack consists of 2 containers, the contents of which when mixed togetherwill give 5 litres of coloured usable product. In the case of the primer/sealer the two containers willyield 4.5 litres of usable product.

PREPARATION: All surfaces should be sound and free from grease, oil and contaminants. Steel should be cleanand free from loose rust and millscale. Concrete must be sound and free from laitance and oil.

AQUACHEM Primer contains an inhibitor to prevent flash rusting.For further explicit information/individual substrate preparation, consult our Technical Bulletin CR2

Aqu achem for Tanking (ref TBCR2/4). If in any doubt refer to our Technical Department.

MIXING AND

APPLICATION:

The contents of the AQUACHEM Base container should be added to the contents of the AQUACHEM Hardener container and mixed thoroughly. Mechanical mixing is recommended. If AQUACHEM is diluted the water must be mixed with the hardener before the addition of the base.DO NOT MAKE PART MIXES. The mixed product should be applied by roller, or in the case of large surface areas by spray. ThePrimer coat may be over-coated when the initial milky appearance has cleared. In the case oftanking, second and third coats should be applied at 90 to previous coats.Please note: The coating must be rolled/painted out evenly. Thick or heavy coats are notadvisable. To obtain specific dry film thickness, multicoats are preferred.In the case of AQUACHEM PRIMER/SEALER being used as a clear finishing coat it is essentialthat the coating is applied at no more than WFT: 75-100 microns, conducive with overall wetting ofthe surface.The 2 mixed components of Aquachem must be used within the pot life of between 1 and 3 hoursdepending on temperature, volume of mixed material and humidity.

COVERAGE: Coverage will depend upon the type and nature of the substrate. As a guide, 3-4m /litre onconcrete. 4-5m /litre on steel. 4-5m /litre on timber depending on porosity.Practical film thickness/coat

AQUACHEM PRIMER 3040-4.5 litre pack - WFT: 75 - 100 microns. DFT: 65 - 85 microns. AQUACHEM Coloured 3001-3022-5 litre pack - WFT: 100 - 125 microns. DFT: 80 - 100 microns. *Wet film thickness (WFT) Dry film thickness (DFT)

AQUACHEM should not be used at temperatures below +5C. The cure is considerably increasedwhen RH is above 70%.

CURESCHEDULE:

Overcoating of the primer is between 1 and 5 hours after primer application. Any external workmust be protected against rain for 12 - 15 hours dependent upon relative humidity andtemperature: Trafficking of complete system is possible 24 - 72 hours after the final application.

APPROVAL: AQUACHEM conforms to the Water Research Council tes t requir ements of BS 6920 for usein potable water situations.

CLEANING OFTOOLS:

Uncured AQUACHEM may readily be removed with warm water and soap. Mechanical methodsare required to remove cured material .

---

The site conditions and equipment required when using individu al Rotafix products are specific for each project.Only advice given by Rotafix in writ ing wil l be considered as part of our cont ractual liability.

---

Epoxy resins and their associated curing agents can cause irritation to some people. Please take the necessary precautions indicated in the COSHH detailsavailable from our offices. Please read our Users Safety Guide on the Handling of Resin and Polymer products.

---The information in this document is based on practical tests, but given without guarantee insomuch as methods of

use by others is beyond our control. Due to continuing development and improvements, it may be necessary

to change without notice the material specification. All goods are sold subject to our Standard Conditions of Sale. AQUACHEM is a Registered Trade Mark of Rotafix (Northern) Ltd

ROTAFIX, ROTAFIX HOUSE, ABERCRAF, SWANSEA SA9 1UR. U.K.TEL: +44 (0)1639 730481 FAX: +44 (0)1639 730858

e.mail: [email protected] web site: www .rotafix.co.uk

SOUTHERN AREA CONTACT: TEL: +44 (0)1442 243169 FAX: +44 (0)1442 234901PD3001-42/ 26


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VINACHEM

PRODUCT CODE: 3520 - 5 litre pack 3521 - 25 litre pack

DESCRIPTION: VINACHEM is an aqueous polymer solution of fine acrylic particles.The liquid material affords maximum penetration into concrete, masonry and brick andcertain types of hard and softwood timber substrates, thereby providing a water-resistantpolymer barrier.Uncured N.V. 20%. Viscosity: 90 - 100cps at 20 C. pH c 8-9Particle Size c. 0.1 microns.

PACKAGING: Supplied in 5 litre and 25 litre plastic bottles.Do not store below 0 C.Shelf life minimum 12 months at a storage temperature of between +5 oC and +20 oC

PREPARATION: Surfaces should be free from grease, oil and other contaminants. It is essential that allloose and friable material be removed from the substrate that is being treated. Thepreferred method of preparation is by use of medium pressure water jet. Pre-treatmentwith a suitable fungicide/biocide solution may be required. Following the preparation,treatment with a suitable fungicide/biocide such as Panacide, may be advantageous.

MIXING: The contents may settle during storage. Check container is securely fastened. Invert 3-4times to ensure contents are mixed.

APPLICATION: A small quantity of VINACHEM should always be applied on a test area. This will enablethe applicator to check that adequate but not excessive material is being applied. It willalso indicate any colour changes which may occur with a particular substrate.

VINACHEM may be applied by brush, roller or garden-type spray. VINACHEM should beapplied at a rate which is conducive with overall wetting of the surface. Excessiveapplication should be avoided, otherwise a translucent surface film may form. Pleaseprotect all glass (windows, car windscreens) from all possible splashing/mist fromapplication of Vinachem. Once cured it would be difficult to remove from these surfaces.

COVERAGE: This will depend on the porosity of the individual substrate and will be between 3m 2 and10m 2 per litre. For certain substrates it may be necessary to dilute VINACHEM with clean

water. Please consult our Technical Department for further information.CURE

SCHEDULE: VINACHEM is touch dry in 15 - 90 minutes, dependent upon the temperature and relativehumidity. M.F.F.T. c. 5 - 8C.

CUREDPROPERTIES:

Water and alkali resistant. Provides protection against carbonation of concrete andprevents weather erosion of certain types of masonry and stone.

SPECIFIC USES: VINACHEM is ideal for sealing concrete floors and in some instances helps consolidateloose and friable surfaces. Once cured, it is impervious to water penetration. It isessential that the correct amount of material is applied in one application. Twoapplications will not offer any further improvement. Ideal for brick, concrete, stone ortimber.

CLEANING OFTOOLS:

Uncured VINACHEM may be readily removed from tools and equipment with water.Mechanical methods are required to remove cured material.

The requirements for a Rotafix product(s) may be specific for an individualproj ect. Advice given by Rotafix can only be consi dered as part of any contract

if it is provided in writing.

Rotafix aqueous based polymer materialsdo not normally present a hazard.

However, standardprecautions when handling aqueous

polymers include the use of gloves andprotection to the face and eyes from

splashes. In the event that splashingoccurs, apply copious amounts of water.

The information in this document is basedon practical tests, but given without

guarantee insomuch as methods of use byothers is beyond our control. Due to

continuing development andimprovements, it may be necessary to

change without notice the material

specification. All goods are sold subject toour Standard Conditions of Sale.ROTAFIX, ROTAFIX HOUSE, ABERCRAF, SWANSEA SA9 1UR. UK

TEL: +44 (0)1639 730481 FAX: +44 (0)1639 730858e.mail: [email protected] Website: www.rot afix.co.uk

SOUTHERN AREA CONTACT: TEL: +44 (0)1442 243169 FAX: +44 (0)1442 234901PD3520-1/13

WITHOUT WITH


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HA SLURRY PRIMER PRODUCT CODE: 3268

DESCRIPTION: HA SLURRY PRIMER is a pre-mixed, ready to use, acrylic modified powder used to protectsteel reinforcing. The system contains a unique blend of fine Portland and microsilicacements, an acrylic co-polymer powder, and a union of compatible admixtures. The powderalso contains powerful corrosion inhibitors. The compound, when mixed with water andpainted onto steel reinforcing, produces an elastic alkaline coating which will protect the steelagainst corrosion and chemical attack.

PACKAGING: 1 Litre Pack (1.25 kg)

PREPARATION: Primer should only be applied to thoroughly prepared surfaces. All surfaces should be sound, dry and free from grease, oil and any other contaminants.

MIXING: HA SLURRY PRIMER powder is mixed with water using a suitable container, an electricpower tool and a 100mm Rotafix Paddle code 3639.Place litre of clean water into a suitable clean container.Slowly add the 1.25 kgs of powder whilst mixing.

After the powder has been added continue mixing for a further 30 seconds.

APPLICATION: Remove all rust, scale and corrosion products on the steel surface by abrasive blasting or bywire brushing. Severely corroded reinforcement should be cut back and replaced. Thesteel should be free from oil, dust, diesel, loose material or other surface contaminants.

Mix and apply one coat of HA Slurry Primer , cover completely and evenly onto the steel orconcrete surface to a thickness of not more than mm.

COVERAGE: 1.25 kgs when mixed with 500cc of water covers 1.0m 2

CURE SCHEDULE: Ready for over coating 30-60 minutes after application, assuming minimum temperature +8 oCR.H. not exceeding 45%

PROPERTIES: Formulated for the protection of steel reinforcement.Use as a primer and protective coating for concrete.Quick and simple to mix and apply.Provides an elastic alkaline protective coating to both steel and concrete.

SPECIFIC USES: Brush or spray applied onto steel reinforcing to protect steel against chlorides, moisture,oxygen and acid gases.To protect steel against de-icing salts and in marine locationsFor use on concrete, concrete repairs and in new constructionProtective coating to new or freshly prepared steel work

An alternative to zinc rich primers or resin coating systems

CLEANING OFTOOLS:

Uncured HA Slurry Primer may be readily removed from tools and equipment with soap andwater. Mechanical methods are required to remove cured material.

The requirements for a Rotafix p roduct(s) may be specific for an individual p roject. Advice given by Rotaf ix can only be considered as par t of t he con tr act if it is provi ded in wr it ing.

ROTAFIX cementitious based products are midly alkaline. Users should take the necessaryprecautions indicated in the COSHH details available from our offices.

Please read our Users Safety Guide on the Handling of Resin and Polymer products.

The information in this document is based on practical tests, but given without guarantee insomuch as methods of use by othersis beyond our control. Due to continuing development and improvements, it may be necessary to change without notice the

material specification. All goods are sold subject to our Standard Conditions of Sale.

ROTAFIX, ROTAFIX HOUSE, ABERCRAF, SWANSEA SA9 1UR. U.K.TEL: (44) 01639 730481 FAX: (44) 01639 730858

e.mail: sales@rotafi x.co.uk Website: www.rot afix.co.uk

SOUTHERN AREA CONTACT: TEL: (44) 01442 243169 FAX: (44) 01442 234901PD3265/5


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RM2 LW REPAIR MORTAR

PRODUCT CODE: 3370 - 2.5 litre pack: 3375 - 10 litre pack

DESCRIPTION: RM20 LW REPAIR MORTAR Epoxy Resin is a 3-part mix. Lightweight repair mortar.

PACKAGING: 2.5 litres (3.2 kg) Coverage at 5mm thickness 0.5m 10 litres (12.8kg) Coverage at 5mm thickness 2m Materials supplied in non returnable plastic containers for ease of mixing.

PREPARATION: Concrete surfaces should be clean and free from Laitance. Reinforcing steel should be cleanand free from loose rust. Rotafix RM20 LW REPAIR MORTAR is compatible with most steel primers.

All surfaces should be coated with Rotafix P12 PRIMER prior to the application of RM20 LW REPAIRMORTAR .

MIXING: The contents of the RM20 LW REPAIR MORTAR Hardener (curing agent) must be added to thecontents of the resin container and mixed thoroughly. The total liquid is then added to the fillerand mixed thoroughly. The 10 litre pack requires to be mechanically mixed using a slow speeddrill and a Rotafix paddle.

APPLICATION: The fully mixed material should be placed immediately onto the wet/tacky primer. If the primerdries prior to application of the RM20 LW REPAIR MORTAR the area must be re-primed. RM20 LWREPAIR MORTAR should be applied to the vertical or overhead surface by use of a steel trowel andhawk using a plastering type technique. The contents of the pack should be mixed, placed andtrowel finished in not more than 40 minutes at +18 C. The thickness obtainable will be dependenton a number of factors:-a) whether the position is vertical or overhead (b) the type of primer usedc) the ambient temperature (d) the individual skill of the operatore) the amount of compaction required around reinforcing steel

A thickness of 50-60mm minimum should be obtainable in one application. In the event that afurther application is required the RM20 LW REPAIR MORTAR should be re-primed.

COVERAGE: 1 litre covers 1m at 1mm thickness.

CURESCHEDULE:

Initial cure 4-12 hours at +20 C. Suitable for grinding or drilling 24-48 hours at +20 C. Final

cure 5-7 days. Minimum application temperature +5 C. Shelf life of unmixed componentsminimum 12 months providing extremes of temperatures are avoided. Unaffected by rain ormoisture within 3 hours of application at +18 C.

CUREDPROPERTIES:

Compressive strength 25 N/mm . Tensile strength 15 N/mm (provisional). Flexural strength 17N/mm (provisional). Specific gravity 1.27 at +20 C. Standard colours Beige/Grey (Colourmatching service available for stonework). Chemically resistant - unaffected by a wide range ofindustrial and domestic chemicals. For specific applications please consult our TechnicalDepartment.

SPECIFIC USES: Suitable for structural repairs of reinforced concrete in horizontal and overhead situations. 50mmin one application is possible.

APPROVAL: RM20 LW REPAIR MORTAR conforms to the Water Research Council Test Requirements of BS6920 for use in potable water situations.

CLEANING OFTOOLS:

Uncured RM20 LW REPAIR MORTAR may be readily removed from tools and equipment with RotafixS200 PC Solvent Cleaner. Mechanical methods are required to remove cured material.

Epoxy resins and their associated curing agents can cause irritation to some people. Please take the necessary precautionsindicated in the COSHH details available from our offices.

Please read our Users Safety Guide on the Handling of Resin and Polymer products.

The information in this document is based on practical tests, but given without guarantee insomuch as methods of use by othersis beyond our control. Due to continuing development and improvements, it may be necessary to change without notice the

material specification. All goods are sold subject to our Standard Conditions of Sale.

ROTAFIX, ROTAFIX HOUSE, ABERCRAF,SWANSEA SA9 1UR. U.K.

TEL: +44 (0)1639 730481 FAX: +44 (0)1639 730858e.mail: [email protected] Website: www.rotafix.co.uk


PD3370-5/9


15/19

P 2 PRIMER

PRODUCT CODE: 3319 - 250cc. 3320 - 0.5 litre pack. 3325 - 1 litre pack. 3330 - 5 litre pack.

DESCRIPTION: P12 PRIMER is a solvent free 2-part unfilled epoxy primer usually used in conjunction with

epoxy mortars and screeds. Special versions are available for use with potable water andtimber substrates.

PACKAGING: 0.5 litre - 250-350 gms/m on average concrete1 litre - Proportional to the above5 litres - Proportional to the above

PREPARATION: Primer should only be applied to thoroughly prepared surfaces.General: All surfaces should be sound, dry and free from grease, oil and any othercontaminants.Concrete: Concrete must be fully cured. All laitance must be removed by either grinding,acid etching, scarifying, scabbling, bush hammering, shot blasting, wet grit and sand blastingor flame cleaning.Metal Substrates: Any steel intended for treatment must be free of blue millscale. Firmadherent light rust may be tolerated. Heavy scale and loose rust must be removed. Allmachine oil and grease must be removed. The ideal treatment for steel is grit or shot blastingto commercial standard SA2. Other metals such as aluminium, copper and stainless shouldbe grease free and lightly abraded with 320 grade carborundum paper. Timber should beclean, dry and free from contamination and timber preservative.

MIXING: The contents of the hardener (curing agent) are added to the contents of the base resincontainer and mixed thoroughly. Pot life 30 - 50 minutes dependent on ambient temperature.

APPLICATION: Rotafix P12 PRIMER can be applied by brush, roller, squeegee or steel trowel dependent, upontype of substrate. Rotafix P12 PRIMER may be used with most products in the Rotafix range.Before use, reference must be made to the technical information on the relevant product.

COVERAGE: 1 litre covers approximately 3m 2 on stone, or 5m 2 on steel.

CURE SCHEDULE: Maximum chemical bond between primer and mortar application is achieved whilst the Primeris still in the tacky state. In the event that the P12 PRIMER is fully cured, it will be necessary toovercoat before application of the mortar.

CUREDPROPERTIES:

Base resin, low viscosity 100% reactive. Viscosity 12,000 mPa.s. at + 25C. Density 1.12.Shelf life 12 months, providing extremes of temperature are avoided. Pot life 20-30minutes/100gms mass at + 20C.Touch dry - 3 hours at +20C at 15 microns. Full cure - 7 days at +20CCompressive strength: >50N/mm. Tensile strength: 25N/mmFlexural strength: 35N/mm.

SPECIFIC USES: P12 PRIMER may be used for bonding new concrete to old.

APPROVAL: P12 PRIMER conforms to the Water Research Council test requirements of BS 6920 foruse in pot able water situations.

CLEANING OFTOOLS:

Uncured P12 PRIMER may be readily removed from tools and equipment with Rotafix S 200 PCSolvent Cleaner. Mechanical methods are required to remove cured material.

Epoxy resins and their associated curing agents can cause irritation to some people.Please take the necessary precautions indicated in the COSHH details available from our offices.Please read our Users Safety Guide on the Handling of Resin and Polymer products.

The information in this document is based on practical tests, but given without guarantee insomuch as methodsof use by others is beyond our control. Due to continuing development and improvements, it may be necessary

to change without notice the material specification. All goods are sold subject to our Standard Conditions of Sale.ROTAFIX, ROTAFIX HOUSE, ABERCRAF,

SWANSEA SA9 1UR. U.K.TEL: +44 (0)1639 730481FAX: +44 (0)1639 730858

e.mail: [email protected] Website: www .rotafix.co.uk

SOUTHERN AREA CONTACT:

TEL: +44 (0)1442 243169FAX: +44 (0)1442 234901

PD3319-30/12


16/19

RENDACRETE LW PRODUCT CODE: 3400

DESCRIPTION: RENDACRETE LW is a prepacked, preweighed powder mix containing graded cements, fibres,aggregates, accelerators and polymers. The material does not contain calcium chloride.

SPECIFIC USES: RENDACRETE LW is specifically formulated for use as a concrete repair material in vertical andoverhead situations. In many cases the 'high build' nature of the material enables work to becarried out without shuttering.

PACKAGING: Packaged in 25kg durable sacks. YIELD: 25kg of powder yields 19.5 litres of LightweightMortar. 1m of Lightweight Mortar requires 1500 kgs of powder.

PREPARATIONOF SUBSTRATE:

All concrete surfaces should be clean and free from laitance. Steel surfaces should be freefrom loose rust, grease and millscale.

MIXING: Rendacrete Lightweight powder is mixed with water in a 25 litre container. The mortar shouldbe mixed slowly, using 200mm Rotafix mixing paddle (Ref: 3640) for 2-3 minutes . Alternativelyfor larger amounts of Rendacrete LW use a forced action pan mixer such as a Creteangle

Add 4 to 4.5 litres of water to the container or mixer. Pour 25kg of powder onto the water while mixing slowly, Max 200 rpm.

After all the powder has been added, mix for 30 seconds. The mortar is now ready for use.

If small amounts of the material are to be used, suitable measuring equipment must beavailable in order to weigh accurately the powder in relation to the volume of water, e.g. 25kgs of Rendacrete LW would require 4 to 4.5 litres of water. The material must be placedwithin 30mins of mixing.

APPLICATION AND EQUIPMENT:

Prior to mixing the Rendacrete LW, treat any exposed reinforcing steel with Rotafix HA SlurryPrimer. Allow to cure, approximately 30mins. Apply P12 Primer ( PD3319-30/11 ) to all concretesurfaces to be treated with mortar including all reinforcing steel. Apply RLW onto wet P12Primer. Further water should not be added to in an attempt to reconstitute the mixedRENDACRETE LW . The general rules with regard to cementitius materials in terms of temperature, humidity andthe curing regime should always be observed.

CURESCHEDULE:

Once the material is in place and has placed, apply Vinachem at a rate conducive with overallwetting of the surface.

MATERIAL USAGE/COVERAGE:

1 bag covers 1m at 19mm thickness.

CUREDPROPERTIES:

TYPICAL DATA at 18% water/powder ratio at 20C CONSISTENCY: stiff mortarWORKING LIFE: 15 minutes (dependent on temperature and humidity) DENSITY: 1500kg/m

7 14 28 DaysMINIMUM COMPRESSIVE STRENGTH:

10 28 32 MPa

CLEANING OFTOOLS:

Uncured RENDACRETE LW may be readily removed from tools and equipment with clean water.

The site conditions and equipment required when using individual Rotafix products are specific for each project. Onlyadvice given by Rotafix in writing will be considered as part of our contractual liability.

ROTAFIX cementitious based products are mildly alkaline. Users should take the necessary precautions indicated in the COSHHdetails available from our offices. Please read our Users Safety Guide on the Handling of Resin and Polymer products.

RENDACRETE is a Registered Trade Mark of Rotafix (Northern) Ltd. The information in this document is based on practical tests, but given without guarantee insomuch as methods of use by others

is beyond our control. Due to continuing development and improvements, it may be necessary to change without notice thematerial specification. All goods are sold subject to our Standard Conditions of Sale.

ROTAFIX, ROTAFIX HOUSE, ABERCRAF,SWANSEA SA9 1UR. U.K.

TEL: +44 (0)1639 730481 FAX: +44 (0)1639 730858e-mail: sales@rotafi x.co.uk Website: www.rot afix.co.uk


PD3401/18


17/19

RF1:

ANCHORAGE STRENGTHS FOR ROTAFIX ZEROSET ANCHOR GROUT

Bolts ins talled in holes drilled with rotary percussive drills on air or water flush

Recommended curves indicate ULTIMATE values fordesign and calculation of permanent anchorages.

SWL to be based on these values and recommendednot to exceed 50% of them.

UNAXIAL LOAD IN TONNES

For Further information, please contact our Technical Department.This information in this document is based on practical tests, but given without guarantee

Inasmuch as methods of use by others is beyond our control.

Rotafix Ltd., Rotafix House, Abercraf, Swansea, UK SA9 1URTel: +44 (0)1639 730481 Fax: +44 (0)1639 730858

e-mail: [email protected] , Web: www.rotafix.co.uk

Southern area contact: Tel: +44 (0)1442243169 Fax: +44 (0)1442 234901


18/19

RF2

MATERIAL REQUIREMENTS FOR ADHESIVE ANCHORS

In most civil engineering applications, the adhesive anchor systems comprise of deformedrebar incorporating thread, nut and washer as the hardware.

The adhesive system may consist of a capsule (cartridge) or a mix and pour (pumped)adhesive.

ROTAFIX market a mix and pour grout, namely ROTAFIX ZEROSET ANCHOR GROUT.

Experience indicates that the anchorages are to be installed into holes drilled by a rotarypercussive air flush method and we recommend the use of hand held drills as giving theoptimum power to weight ratio

The following table indicates the volumes of adhesive required per anchorage:

REBAR BOLT

MM

PREFERREDHOLE

MM

MINIMUM ANCHORAGE

LENGTHMM

THEORETICALVOLUME OF ADHESIVE

CC8

121616202525323240

12162024263236384050

100100100100100100100300300300

6101125223153

100140212

Double theanchorage lengthdouble thevolume i.e.25mm bolt in32mm hole200mm deep 62cc adhesiverequired.

In practice, add 10% minimum to allow for wastage.

To reduce wastage:1. Drill minimum hole required.2. Do not drill hole to excess depth3. Do not overfill hole4. Do not mix more material than can be handled in one continuous grouting operation.







19/19

RF3

TYPICAL STRENGTHS OF REBAR AND TOR-BAR

BS 4449

NominalBar mm 12 16 20 25 32 40

CrossSectional Area ofShank

mmin

113.10.175

201.10.312

314.20.487

490.90.762

804.21.248

1256.610.950

UltimateTensile

Strength

kNin

474.7

848.4

13013

20420.4

33433.4

52252.2

70% ofUltimate

kNtonf

333.3

595.9

919.1

14314.3

23423.4

36536.5

ShearStrength

kNtonf

262.6

474.7

737.3

11411.4

18718.7

29229.2

Type ofCut

Thread

B.S.W. 5/8 1 1 1

CrossSectional Area ofMean

of B.S.W.Cut

Thread

mmin

101.30.157

162.60.252

238.70.37

4290.665

683.91.06

983.91.525

UltimateTensile

Strength

kNtonf

424.2

676.7

999.9

17817.8

28428.4

40840.8

70% ofUltimate

kNtonf

292.9

474.7

696.9

12512.5

19919.9

28628.6

ShearStrength kNtonf 232.3 383.8 555.5 10010 15915.9 22922.9

The above figures to be used in calculating diameter of anchor required for specificloading requirements. Rotafix will supply other grades of bolts to suit individualrequirements, including stainless steel systems for critical environments.






Technical Bulletin CR1

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Transcript of Technical Bulletin CR1