EXPERIMENTAL STUDY ON PERVIOUS CONCRETE WITH ADDITION OF POLYMER ADMIXTURE

STRUCTURAL ENGINEERING

Pervious concrete is a special type of concrete, which consists of cement, coarse aggregates, water and chemical admixtures. As there are no fine aggregates used in the concrete matrix, the void content is more which allows the water to flow through its body. So the pervious concrete is also called as Permeable concrete and Porous concrete. The aggregate usually consists of a single size which has 20mm and is bonded together at its point of contacts by a past formed cement, water and admixture. Then usually as high percentage connected of inter connected voids unlike conventional concrete, normally pervious concrete has void ratio in between 10-30% There is lot of research work is going in the field of pervious concrete. The compressive strength of pervious concrete is less when compared to the conventional concrete due to its porosity and voids. Hence, the usage of pervious concrete is limited even though it has lot of advantages, so me added polymer admixture to increase the compressive strength and flexural strength as well as it also reduces the curing time of concrete. If the compressive strength and flexural strength of pervious concrete is increased, then it can be used for more number of applications. For now, the usage of pervious concrete is mostly limited to places only. If the properties are improved, then it can also be used for medium and heavy traffic rigid pavements. Along with that, the pervious concrete eliminates surface runoff of storm water, facilitates the ground water recharge and makes the effective usage of available land. The main aim of our project is to improve the strength characteristics of pervious concrete. But when increase in strength, the permeability of pervious concrete will be reduced. Hence, the improvement of strength should not affect the permeability property, because it is the property which serves its purpose.

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