033 esha seal 2c
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Transcript of 033 esha seal 2c
24/06/2014 Author: Dr. Zhao Su Page 1
EshaSeal 2C
Research on Alternatives
for Tar-containing Antiskid Surface
24/06/2014 Author: Dr. Zhao Su Page 2
Background Information
Concerning the health risk and environmental impact, The Dutch law legislation on
construction materials came to effect:
• Polycyclic Aromatic Hydrocarbons content < 75mg/m²/100 years since 1999
• Exception made on airfield pavements (antiskid surfaces) till 2013
As a result, effort has been made to find an alternative antiskid surface for airports:
• A CROW working group established (specifications)
• Research activities
A. van Leest (CROW) at the early of 2000
Any existing surface constructions meet the national environmental legislation
and are qualitatively comparable with Antiskid surface? - NO!
X. Yue (PhD candidate at TUD) – 2009 / 2013
Alternatives for tar-containing antiskid surface (MBE / MER / EMB) - Yes! Stellingen 2: Bitmen gemodificeerd met een tweecomponenten epoxy kan het
beste alterntief zijn voor teerhoudende antiskid lagen.
EshaSeal 2c results both from TUD and Icopal RD centre are presented and discussed.
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Outline
• Background Information
• Development of An Alternative Antiskid Binder – EshaSeal 2C
• Properties of the Antiskid binder
* Strength and strain development
* Relaxation
* Rheology
* Ageing resistance (UV and high temperature ageing)
* Water-vapour permeability
* Fuel resistance
• Properties of the Antiskid Surface
* Surface texture
* Adhesion and shear strength between asphalt and the antiskid layer
* Construction of the antiskid test section
* Field skid resistance test (by Sarsys Surface Friction Tester)
• Other Application cases
• Conclusions
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Epoxy Chemistry
Stiffer Epoxy
Flexible Epoxy
Polymerisation
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Alternative Antiskid Binder – EshaSeal 2C
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Test Results
* Strength and strain development;
* Stress relaxation property;
* Rheological property;
* Adhesion property;
* Texture of antiskid surface;
* Water - vapour permeability;
* VU- and temperature resistance;
* Fuel resistance;
* Skid resistance.
By Yue Xiao
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Strength and Strain Development – by Yue Xiao
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Stress Relaxation – by Yue Xiao
Temperature (ºC) Binder A1 (%) Binder A2 (%) Binder A3 (%)
0 28.72 42.33 72.51
10 42.03 73.39 91.35
20 80.40 94.69
The relaxation behaviour of 3 types of epoxy bitumen mixtures
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Rheological Property (Master Curve) – by Yue Xiao
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Effect of Ageing on the Strength & Strain
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Effect of Ageing on the Rheological Property – by Yue Xiao
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Water-Vapour Permeability
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Fuel resistance - 1 Test Results – Visual Examination
Diesel with highly modified bitumen
Diesel with EshaSeal 2C
Samples after 24 hours immersion
highly modified bitumen
EshaSeal 2C
Colour Black
Colour Unchanged Form Unchanged
Form Deformed
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Fuel resistance - 2
Test Results – Weight Loss
Sample Weight Before (g) Weight After (g) Weight Loss (FA in %)
Seal 2C -1 41,22 41,21 0,03
Seal 2C -1 41,45 41,45 0,00
Seal 2C -1 40,98 40,96 0,05
Modified Bitumen 27,05 25,28 6,54
After the immsersion test (before weighing):
•Seal2C samples were wiped out with tissues.
•Modified bitumen was so soft, kept untouched (thus the weigt including diesel film on the surface).
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Fuel resistance - 3
Test Results – Strength & Strain
0
1
2
3
4
5
6
0 10 20 30 40 50 60 70 80 90
Ten
sile
Str
engt
h (
MPa
)
Tensile Strain (%)
Refence Fuel Treated
Sample Diesel Treated Seal 2C Untreated Seal 2C FA (%)
Strength (MPa) 4,76 4,66 +2,15
Strain (%) 79,53 74,43 +6,85
Very identical results achieved (average of 3 tests)
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Properties of Antiskid Surface
Texture
The measured texture depth is 1.81 mm >1.25 mm specified
10 cm
Core has been taken out
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Bonding Strength – by Yue Xiao
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Construction of Antiskid Surface
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Constructed Antiskid Surface
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Properties of Antiskid Surface
Skid resistant measurement (SSFT )
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Properties of Antiskid Surface
Skid resistant results
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Other Applications - 1
Antiskid Surface on Recycled-PE and Concrete Bridge
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Other Applications - 2
To glue materials on asphalt (rubber, steel, concrete)
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Other Applications - 4
Acid resistant asphalt
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Conclusions
1. EshaSeal 2C is a Cold-applied product and technology with super workability.
2. EshaSeal 2C is a visco-elastic binder, demonstrating fast strength development, good relaxation
behaviour and excellent rheological properties, it has much higher strength and strain value, as well as
less susceptible to temperature (low phase angle, particularly at low and high frequency) as compared
with modified bitumen binder.
3. EshaSeal 2C is temperature- and UV-ageing resistant. The high temperature ageing has a positive
influence on the tensile strength and strain development, probably due to the fact that the high
temperature promotes the epoxy to react to a more mature degree. This finding also applies to UV
ageing, in which the temperature is maintained at 50ºC.
4. Excellent adhesion strength to various substrates. The adhesion strength between EshaSeal 2C
antiskid layer and asphalt is remarkable higher than the tensile strength of the asphalt itself.
5. EshaSeal 2C is more water-vapour permeable than bitumen and modified bitumen binder.
6. Excellent fuel resistance
7. EshaSeal 2C antiskid surface shows excellent friction values, much higher the design objective
(conception level) by NATO STANAG 3634 and ICAO Annex 14.
In general, EashSeal 2C is a strong and flexible binder, the EshaSeal 2C antiskid surface fulfils all the
requirements of the specification, such as the macro-texture, adhesion/shear strength and excellent
skid resistance shown by the field test. The fuel and chemical resistance has to be tested further.
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Acknowledgements
Authors like to express their gratitude to:
Dr. Xiao for his permission to present part of his PhD research results at TU Delft.
Frans Nooren BV for construction of the antiskid test section at Airbase Woensdrecht.
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Thank you for your attention!