e-ISSN: 2582-5208 International Research Journal of Modernization in Engineering Technology and Science Volume:02/Issue:09/September-2020
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REVIEW OF MODIFICATION OF PERVIOUS-CONCRETE BY ADDITION OF POLYMER Tanmay Gosavi*1, Akshata Patil *2, Shraddha Somvanshi*3, Mr. Sunil Deshpande*4 *1,2,3Student,
*4Assistant
Department of Civil Engineering, Dr. D. Y. Patil Institute of Engineering and Technology, Pimpri, Maharashtra, India.
Professor, Department of Civil Engineering, Dr. D. Y. Patil Institute of Engineering and Technology, Pimpri, Maharashtra, India.
ABSTRACT At present, pervious-concrete is hugely taken into account among the most right fitting materials to manage high flow of water over the ground surface, allows rainfall to seize, thus percolate into the ground, reducing storm water runoff and to provide several environmental interests. Pervious-concrete is mainly used to improve the impoverished designs, poor construction approaches, and traffic congestion of heavy vehicles. The improvements in the characteristics of the conventional pervious-concrete probably intensified with inclusion of polymers. Polymers amid the Pervious-concrete helps to improve the performance of the pervious concrete in terms of the strength and various properties of the concrete. Researches observed regarding changes in ordinary or regular pervious-concrete by addition of polymers includes studies to a very little extent. Polymers exhibit various characteristics such as resistance to damage and high durability, without affecting the porosity of ordinary pervious-concrete. In this project, we have studied the improvement of conventional pervious-concrete with addition and without addition of polymers. Keywords: Environmental Benefits, Pervious-Concrete, Polymer Modification of Pervious-Concrete, Improve Strength of the Pervious-Concrete without affecting the porosity.
I.
INTRODUCTION
Pervious-concrete is an exceptional kind of the concrete with characteristics of great permeability utilized for applications related to concrete works such as walkways, sideways, foundations, driveways and any other flat surface, that permits water from rainfall and additional origins to make its way straight, thereby lessening the runoff from an area and permitting recharge of the groundwater. Pervious-concrete is structured utilizing aggregates of large size with less to negligible aggregates of fine size. The involvement of a minute quantity of sand will enhance the strength of the pervious-concrete. The w/c ratio of the mixture varies between 0.28 and 0.40, the void content of the mixture varies between 15% and 25%. The paste of the concrete thus coats the aggregates and permits water to make its way through the slab of the concrete. It is an important application for sustainable construction and is one of many low impact techniques used by builders to protect water quality. Pervious-concrete is delicate to the content of water added, lower the water to cement ratio; higher is the concrete’s strength, but a very less amount of water probably results in the collapse of the surface. Thus, water added in correct quantity in the concrete is of great importance. Materials used: (1) Cement: Cement has an adhesive property, which is utilized in wide areas of construction works that toughens, and is perfectly ready to hold two or more substances or constituents together. The main purpose of cement is to hold gravel-sand together. In the current project, OPC (Ordinary Portland Cement) ULTRA TECH 53 GRADE was used to cast cubes of all concrete mixes. The cement was free from lumps and even in hue. (2) Coarse aggregate: Crushed granite stones can be utilized brought via granite quarries nearby. The maximum size of aggregates used was 20mm retained to the 12.5mm. The broken stones are generally used as aggregate. The process of cleaning aggregates should be enacted properly and should be left to attain dehydrated position. www.irjmets.com
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e-ISSN: 2582-5208 International Research Journal of Modernization in Engineering Technology and Science Volume:02/Issue:09/September-2020
Impact Factor- 5.354
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(3) Water: Water is an essential component used for preparation of all cubes of concrete. Generally, water which is safe for drinking is used in the construction works as per IS 456:2000 recommendations. Water carries a pivotal character in the functioning of pervious-concrete; hence the attribute of water is an essential measure to be looked upon and should be of superior quality. Water with Ph of 6.0 to 8.0 which does not possess salinity is suitable for use. In this project, superior quality of water is used to prepare the concrete cubes. (4) Polypropylene Fiber: Polypropylene is a synthetic material made from the combination of large chain of monomers which is utilized on a large scale in diverse applications. It is produced through chaingrowth polymerization from the monomer propylene. It is the most utilized synthetic material in diverse solicitation because of its quality opposition or resistance to chemicals, fatigue and is tough in nature
II.
METHODOLOGY
We will prepare several cubes of concrete using cement and water and sand for testing its splitting tensile strength, compressive strength and flexural strength. Batching is the first process to be carried out. The procedure of computing constituents to produce mix of concrete is known as concrete-batching. Batching should be properly done to obtain concrete mix of superior quality. The water cement ratio to be used to design higher quality concrete can be in the range 0.3-0.4. We were about to conduct different tests on the concrete sample, but due to outburst of COVID-19 pandemic we could not perform it efficiently. Tests to be evaluated: (1) Slump cone test: The slump cone test on concrete is done to check the workability of the concrete. The internal surface of the mold should be thoroughly clean and freed from the moisture and any set concrete before commencing the test. Filling the cone with concrete in four layer and tamping 25 blows evenly in each layer with long steel rod of diameter around 16mm. Remove the excess concrete from top of the cone, using tampering rod, clean overflow from base of cone. The mold should be removed from the concrete by slowly raising in the vertical direction. Then, it will be noticed that the concrete tends to subside, this subsidence is referred as slump of concrete. The value of the slump is then measured by the difference of the height of the mold and that of the highest point of the sample. This difference in hiding is taken as slump of concrete. Discrete the used concrete. (2) Compressive strength test: The strength of concrete in compression is important because other strengths such as flexure and resistance to abrasion improves with increase in its strength in compression. The strength of concrete in compression is dependent upon the proportion of ingredients or constituents used in concrete by using different proportion of ingredients to meet the structure requirement. By this single test one can judge that whether concreting has been properly done or not. The compression testing machine is used for testing the strength of the concrete in compression. A concrete cube test or cylinder test is generally carried out to assess the strength of concrete after 7 days, 14 days or 28 days of casting. (3) Flexural strength test: This test is an indirect process to determine the strength of the concrete in flexure. The strength of concrete in flexure is determined by either central point loading or two-point loading. The bed of the machine (UTM) is to be provided with two steel rollers of 38mm in diameter. The roller is mounted at a distance from center to center should be 600mm for 150mm specimens and 400mm for 100mm specimens. The load applied through similar roller should be mounted at the top. In case of 2 point loading the rollers should be spaced at 200cm or 133cm center to center. The concrete is to be prepared as per the required grade of the concrete and placed on the mold in layers and tamping should be done in 25 blows for each layer. After a day the mold should be removed and the sample should be placed in the curing tank at a temperature of 27 plus or minus 2 degrees Celsius. Depending upon the requirement the test sample is to be removed from the tank and dried at 14 and 28 days for testing. The specimen is placed on the rollers and centered with the longitudinal axis of the specimen. The load should be applied at a rate of loading of 400kg per minute for the 150mm specimens and at a rate of 180kg per minute for the 100mm specimens. Finally, the load at which the cylinder fails by developing the cracks should be noted down. Then, measurement of distance is to be done between the line of fracture and the www.irjmets.com
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e-ISSN: 2582-5208 International Research Journal of Modernization in Engineering Technology and Science Volume:02/Issue:09/September-2020
Impact Factor- 5.354
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nearest support. If this distance is greater than 200mm for 150mm and 130mm for 100mm specimens. Thus, the strength of the concrete in flexure is calculated. (4) Splitting tensile strength test: The strength of the sample cube in tension is taken into account by dehydrating specimen’s surface after curing. Further, outlines on both the edges of the sample are marked diametrically to substantiate that they are on the same position along the direction of an axis. Dimensions of the specimen are measured. A plywood strip is to be positioned on the bottom-plate of the sample. Another plywood strip is to be positioned overhead of the sample and the plate on the top is to be laid down to the surface of the strip so that it touches the strip. A load should be put in constantly unaccompanied by the disturbance or shock; to determine the breaking point of the specimen. Thus, the test to determine the strength of the concrete cube in tension is carried out.
III.
MODELING AND ANALYSIS
The ultimate goal of the study is to assess the performance of the pervious-concrete material by addition of polymers. We collected data regarding the polymers and finalized them to put in the pervious-concrete material to enhance the improved performance and long-term durability of the polymer-modified pervious-concrete. A quick study was done on the finalization of polymers. The polymers finalized to be added in the pervious-concrete were:
Polypropylene Epoxy Polyvinyl chloride.
However, due to the outburst of; COVID-19 pandemic, we could manage to adjust just a single polymer called Polypropylene. The polymer-modified pervious-concrete was expected to undergo different types of tests namely slump cone test, compressive strength test, tensile strength test and flexural strength test. Samples of pervious-concrete and concrete with addition of polymer (Polypropylene) were prepared to evaluate the compare the results between them. But we could not manage to implement different tests on those samples due to the lockdown period cause of COVID-19 pandemic. The disciplining of perviousconcrete by addition of polymer is shown below in the following:
Figure-1: Polymer-Modified Pervious Concrete
IV.
RESULTS AND DISCUSSION
The tests are expected to be conducted on the pervious-concrete and polymer-modified perviousconcrete. The test would indicate the comparison between the conventional pervious-concrete and polymer-modified pervious-concrete in terms of strength and various properties of the concrete. The test performed and their results are presented below in tabular form, www.irjmets.com
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e-ISSN: 2582-5208 International Research Journal of Modernization in Engineering Technology and Science Volume:02/Issue:09/September-2020
Impact Factor- 5.354
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1. Compressive Strength test
Compressive Strength Strength in MPa
50 40 30 20 10 0 3 Days
7 Days
14 Days
28 Days
No. of Curing Days Perv.Conc
PMPC
Figure-2: Compressive Strength Table-1: Compressive strength differentiation Sr. No.
No. of Days
Conventional Pervious concrete (MPA)
Polymer-Modified Pervious Concrete (MPA)
1
3
5.3
10
2
7
15
23
3
14
23
31
4
28
31
40
2. Flexural Strength test
Flexural Strength Strength in MPa
7 6 5 4 3 2 1 0 3 Days
7 Days
14 Days
28 Days
No. of Curing Days Per.Conc.
PMPC
Figure-3: Flexural Strength
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e-ISSN: 2582-5208 International Research Journal of Modernization in Engineering Technology and Science Volume:02/Issue:09/September-2020
Impact Factor- 5.354
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Table-2: Flexural strength differentiation Sr. No.
No. of Days
Conventional pervious concrete (MPA)
Polymer-Modified Pervious Concrete (MPA)
1
3.5
1.5
2.5
2
7
1.8
3.5
3
14
2.2
5.1
4
28
2.5
6
3. Slump Cone test Table-3: Slump differentiation Conventional Pervious Concrete
Around 80mm slump
Polymer-Modified Pervious Concrete
Around 50mm slump
4. Splitting Tensile Strength test The concrete’s strength in tension is among the most solitary and fundamental characteristics that hugely influence the degree and magnitude of split or rupture in constructions. The aforementioned test on concrete is a technique to find out and decide the strength of the concrete in tension.
V.
CONCLUSION
The expected conclusions from the above experimental investigation can be as follow:
In contrast with ordinary or regular pervious-concrete, polymer-modified pervious-concrete might improve its strength in compression.
In contrast with ordinary or regular pervious-concrete, the strength in flexure of the polymermodified pervious-concrete might improve.
The concrete possessing high resistance to the damages and high durability is polymer-modified pervious concrete rather than conventional pervious concrete.
The increase in strength of tension probably be expected to a certain extent.
It is expected that the permeability of concrete does not get affected by using the polymer polypropylene, therefore it can be used as a composite material to enhance the strength in compression, strength in flexure, strength in tension of concrete without affecting its permeability.
VI. [1]
[2]
REFERENCES
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e-ISSN: 2582-5208 International Research Journal of Modernization in Engineering Technology and Science Volume:02/Issue:09/September-2020
Impact Factor- 5.354
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