International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
AN EXPERIMENTAL STDUIES ON BEHAVIOUR OF PERVIOUS CONCRETE BY USING ADDITION OF ADMIXTURES G.Divya1, L.Reena2 1G.Divya,
2L.Reena,
Dept of Civil Engineering, EBET i, Kangeyam, Tamil Nadu, India AP/Civil, Dept of Civil Engineering, EBET i, Kangeyam, Tamil Nadu, India
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Abstract - Pervious concrete is the high porosity of concrete which is used for flatwork applications and allows the water from precipitation and other source to pass through there by reducing the runoff from a site and recharging ground water levels. The paper shows the additional strength given to the concrete by using admixtures. Concrete materials involve ingredients like cement, coarse aggregate, water, admixtures like fly ash, ground granulated blast furnace slag (GGBS). Coarse aggregate of size 12mm is used. The M53 grade of cement is tested for the process of construction purpose and future use. Key Words: PERVIOUS CONCRETE, GGBS, FLY ASH
1.1 INTRODUCTION Pervious concrete is a composite material consisting of coarse aggregate, Portland cement and water. It is different from conventional concrete as the mixture contains no fines in it. The aggregate is usually of a single size and is bonded together by a cement paste. The result is a concrete with a high percentage of interconnected voids that allow the penetration of water through the material matrix. Normal concrete has a void ratio around 3- 5% and pervious concrete has higher void ratios from 18-40% depending on its application. Pervious concrete differs from normal concrete in several other ways. Pervious concrete has lower compressive strength, higher permeability and a lower density. Its compressive strength could be 65% lower than the normal concrete. Pervious concrete is increasingly being installed to improve storm water quality and reduce runoff produced by urban settings. During the last few years, pervious concrete has attracted more and more attention in concrete industry due to the increased awareness of environmental protection. Many laboratory and field studies have been conducted to investigate into various aspects of pervious concrete. Many studies revealed that unlike conventional concrete, the performance of pervious concrete is highly dependent on both concrete materials and construction techniques. The focus of pervious concrete technology is the balance of permeability and mechanical properties as well as durability. Š 2017, IRJET
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Impact Factor value: 5.181
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If the mixture is too wet and easy to compact, the voids will be clogged and the permeability will be compromised. If the mixture is too dry and hard for compaction, the pervious concrete pavement will be weak and vulnerable to various types of distress. 1.1 SCOPE AND OBJECTIVE In recent times many studies have been carried out on no fines concrete. The objective of the present study is to check the performance of no fines concrete on various percentage of fly ash and GGBS . Concrete is the most important material for construction purposes and cement is the most expensive ingredient in it. The name of no fines concrete itself explains that the fine aggregate has been omitted in this kind of concrete. Due to the absence of fine aggregate in no fines concrete, there is a high percentage of void space which results in high permeability. The unit weight, drying shrinkage and hydrostatic pressure for no fines concrete is less compared to conventional concrete. Due to the less cement content in no fines concrete, the cost of the overall project reduces.
1.2 USES [1]To construct walls and other structural members.[2] To construct in low-cost buildings.[3] parking lots ,sidewalks and secondary road ,sandwich panel, Drainage layers under reservoir and basement floors Paving and.[4] To reduce the runoff from a site, recharging ground water levels.
1.3 ADVANTAGES AND DISADVANTAGES Low density, Low cost, Low thermal conductivity, relatively low drying shrinkage, No segregation, better insulating characteristics than conventional concrete because of the presence of large voids. Lack of construction experience, clogging, cold weather problems.
2. LITERATURE REVIEW Francesca Tittarelli [1] No-fines concretes with compressive strength in the range 7-30 MPa at 28 days of curing were optimized by changing the water-cement ratio from 0.41 to 0.34 and the aggregate-cement ratio from 8 to 4. ISO 9001:2008 Certified Journal
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