A PARAMETRIC STUDY ON PROPERTIES OF SELF … · A PARAMETRIC STUDY ON PROPERTIES OF ... (Oussama...

June 2016, Volume 3, Issue 6 JETIR (ISSN-2349-5162)

JETIR1606013 Journal of Emerging Technologies and Innovative Research (JETIR) www.jetir.org 70

A PARAMETRIC STUDY ON PROPERTIES OF

SELF COMPACTING CONCRETE USING

RECYCLED COARSE AGGREGATE

Prof. Y.V.Akabari 1, Prof Dr. K.B. Parikh

2, Tejas H. Raviya

3

Department of Civil Engineering DIET-Rajkot

1 Assistant Professor, civil department, DIET- Rajkot, Gujarat, India

2 Head of Department, Applied Mechanics Department, Government Engg. College, Dahod, Gujarat, India

3 PG student, Masters of Structural Engineering, DIET- Rajkot, Gujarat, India

Abstract: This Report represents that the influence of varying amounts of recycled coarse aggregate (RCA) collect from a

demolished Cancer Hospital, Located at Rajkot, Gujarat, about 50 years old on the properties of self-compacting concrete (SCC)

and compared it with the results with normal vibrated concrete (NVC) containing 100% natural coarse aggregate (NCA).The

properties such as physical and mechanical properties of natural and recycled coarse aggregates are carried out. NCA is partially

replaced with RCA by an amount 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% and 50%. The effect of RCA on the properties

of SCC in green state (e.g. Slump flow test, V-Funnel test and L-Box Test) and properties of concrete in hardened state (e.g.

compressive strength, flexural strength, and Split tensile Strength) are studied. The mix design was carried out for M-30 and M-35

grade of concrete. The experimental results shows that the compressive strength, flexural strength and split tensile strength is

higher than the use of Recycled coarse aggregate and the strength of SCC decreases with an increase rate of replacement

percentage of recycled aggregate (RA). The present study recommends SCC marginally achieves required compressive strength

up to 40% replacement of RCA.

Key words: Recycled coarse aggregate (RCA), Natural Coarse Aggregate (NCA), Self-Compacting concrete(SCC), Normal

vibrated concrete (NVC).

_____________________________________________________________________________________________

Introduction

The cement concrete has been very important and best building material for all types of industrial and civil works. It increase in

difficulty of construction and lack of skilled labors. In congested designed of steel fair as applied to concreting in congested area, and

it continuously decrease the strength of concrete. Concrete is a widely used construction material around the world. Numerous types

of concrete have been developed to enhance the different properties of concrete. When huge quantity of concrete of very high steel is

to be placed in a reinforced concrete member, it is very hard or difficult to ensure that the form work completely filled with concrete

that is, fully compacted without voids or honeycombs. Compaction by manually or mechanically vibrators is very hard in this

condition. The methods of compaction, vibrations produces delay and it increase the cost of the overall project. In case of underwater

concreting, the vibration or compaction are not possible, in that case self- compacting concrete(SCC) are adopted.

A. Recycled Coarse Aggregate

As per the title, the recycled aggregate collected from the demolished structure located at the Rajkot. After collecting, sorting out

according to its size and shape. The size of the used aggregate is 12.5 mm passing and 10mm retained. The hugh clinker to be crushed

by the jaw crusher . This Recycles aggregate replaced by the natural aggregate by the increment of 5% interval respectively.

Figure:1 Recycled Aggregate



Table:1 Physical properties of RCA

Properties RCA

Abrasion Value 17.20%

Impact Value 27.665%

Crushing Value 34.10%

Specific gravity 2.61

water absorption 4.46%



B. Mix Design of M-30 & M-35 Grade Concrete:

C. Fresh Properties of M-30 & M-35 Grade Concrete:



1. Slump Flow Test

In M-30 grade concrete with the increment of RCA up to 5% to 50% with increment of 5% the value of slump

decreases in the rate of percentage 0.42, 0.85, 0.99, 2.44, 4.69, 4.85, 5.78, 3.78 and 5.81 respectively.

In M-35 grade concrete with the increment of RCA up to 5% to 50% with increment of 5% the value of slump

decreases in the rate of percentage 0.28, 0.97, 0.84, 2.41, 3.81, 3.94, 6.19, 7.13, 7.45 respectively



2. V-Funnel Test

In M-30 grade concrete with the increment of RCA up to 5% to 50% with increment of 5% the value of V-Funnel

decreases in the rate of percentage 6.9%, 10.99%, 14.74, 16.49, 16.78, 21.36, 24.3% and 26.36 respectively.

In M-35 grade concrete with the increment of RCA up to 5% to 50% with increment of 5% the value of V-Funnel

decreases in the rate of percentage 5.68, 7.6, 11.7, 13.54, 14.43, 14.67, 15.45, 16.32, and 17.34 respectively.

3. L-Box Test

In M-30 grade concrete with the increment of RCA up to 5% to 50% with increment of 5% the value of L-B0x

decreases in the rate of percentage 2.3, 3.45, 4.6, 4.98, 5.45, 6.9, 9.2, 12.64, 12.64 respectively.

In M-35 grade concrete with the increment of RCA up to 5% to 50% with increment of 5% the value of L-Box

decreases in the rate of percentage 3, 3.54, 4.56, 6.82, 7.95, 9.21, 10.23, 13.64, 15.91 respectively.



4. J-Ring Test

In M-30 grade concrete with the increment of RCA up to 5% to 50% with increment of 5% the value of J-Ring


In M-35grade concrete with the increment of RCA up to 5% to 50% with increment of 5% the value of J-Ring


D. Hardened Properties Of Concrete

1. Compressive Strength Of M-30 Grade Concrete

In M-30 Grade concrete. Replacement adopted 5% to 50% of RCA with increment of 5%, at the 5% strength

decreases 0.51% and At the 50% strength decreases 19.82%.



2. Flexural Strength Of M-30 Grade Concrete

In M-30 grade concrete Replacement of RCA up to 55 to 50% with increment of 5%, at the 5% flexural strength

decreases 2.54% and at the 50% flexural strength decreases 42.82%.

3. Split Tensile Strength Of M-30 Grade Concrete

In M-30 grade concrete Replacement of RCA up to 55 to 50% with increment of 5%, at the 5% split tensile strength




4. Compressive Strength Of M-35 Grade Concrete

In M-35 Grade concrete. Replacement adopted 5% to 50% of RCA wit increment of 5%, at the 5% strength

decreases 0.64% and at the 50% strength decreases 18.17%.

5. Flexural Strength Of M-35 Grade Concrete

In M-35 grade concrete Replacement of RCA up to 55 to 50% with increment of 5%, at the 5% flexural strength




6. Split Tensile Strength Of M-35 Grade Concrete

In M-35 grade concrete Replacement of RCA up to 55 to 50% with increment of 5%, at the 5% split tensile strength

decreases 1.01%% and at the 50% flexural strength decreases 39.90%.

E. Durability Results Of M-30 & M-35 Grade Concrete



F. Conclusion

From the study of SCC with replacement of RCA with NCA up to 50% with the increment of 5%, the concrete satisfy the fresh

properties according to EFNARC Guideline including slump, L-Box, V-Funnel and J-Ring.

It is observed that, the concrete fulfilled the requirement of guideline, But with the increment of RCA the value of fresh properties

decrease respectively.

In the slump flow test, replacement of RCA up to 5% to 50% with increment of 5%, the value of flow decreases 0% to 9%

respectively.

In L-Box test replacement up to 5% to 50% with increment of 5% there is maximum increment in Ratio of H2/H1 is 15.15%



Results of J-ring shows that for same replacement there is increasing the height upto 40.89% and in V-funnel with the same

replacement there is increase time up to 26.36%.

The study shows that the Hardened properties decrease with increment of replacement of RCA.

Upto replacement of 5% to 50% with increment of 5%, the compressive strength decrease 3% to 1 9.71% respectively.

From the result it is observed that up to replacement of 5% to 50% with increment of 5%, the split tensile strength decrease 0.95%

to 43% respectively.

In flexural strength, up to replacement of 5% to 50% with increment of 5%, the strength decreases 0.80% to 29% respectively.

In the durability purpose, comparison between HCL, H2SO4 and MgSO4 the highest strength decreases in MgSO4.

From the above study of durability, the maximum strength decreases in HCL, H2SO4 and MgSO4 are 21%, 24% and 37%

respectively.

G. References

[1] Adverse effect of the mass substitution of natural aggregates by air-dried recycled concrete aggregates on the self-compacting

ability of concrete: evidence and analysis through an example (Oussama Kebaïli, Michel Mouret, Nourredine Arabi, Franck

Cassagnabere, ELSEVIER-2015)

[2] Failure characteristics of self-compacting concretes made with recycled aggregates (Mehmet

[3] Gesoglu, Erhan Güneyisi, Hatice oznuroz, Ihsan Taha, Mehmet Taner Yasemin, and ELSEVIER-2015)

[4] Mix Design Procedure for Self Compacting Concrete (Krishna Murthy.N, Narasimha Rao A.V, Ramana Reddy I .Vand

Vijayasekhar, Reddy .M, IOSR-2012)

[5] Properties of self-compacting concrete using recycled coarse aggregate (K C Panda and P K Bal, ELSEVIER-2013)

[6] Properties of self-compacting concrete prepared with coarse and fine recycled concrete aggregates (S.C. Kou, C.S. Poon,

ELSEVIER-2009)

[7] Performance of recycled aggregate concrete based on a new concrete recycling technology (Somayeh Lotfi, Manuel Eggimann,

Eckhard Wagner, Radosław Mroz, Jan Deja, and ELSEVIER-2015)

[8] Permeability properties of self-compacting concrete with coarse recycled aggregates (L.A. Pereira-de-Oliveira, M.C.S.

Nepomuceno, J.P. Castro-Gomes, M.F.C. Vila, ElSEVIER-2014)

[9] Properties of self-compacting concrete prepare with coarse recycled concrete aggregate (Zoran JureGrdic, Gordana A. Toplicic-

Curcic, Iva M. Despotovic, Nenad S. Ristic, and ELSEVIER-2010)

[10] Properties of recycled concrete aggregate under different curing conditions (Ahmed Shaban Abdel-Hay, HBRC-2015)

[11] Self-compacting concrete with recycled aggregate: A solution for sustainable development (Prashant O. Modani and Vinod M

Mohitkar, IJCSE-2014)

[12] M.S.Shetty, Concrete Technology

[13] A.M.Navil, Concrete Technology

[14] EFNARC Guideline

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