engleski

Polymer modified pervious concrete

Pervious/permeable/no-fines concrete is a material with the same basic components as the standard concrete but designed to have high porosity. The typical properties of pervious concrete are: good drainage properties, high noise absorption properties, ability to reduce urban heat islands, poor mechanical properties, low abrasion and freeze-thaw resistance. A pervious concrete mixture is composed of cement, water, and coarse aggregate, with or without a small amount of fine aggregate. Although the composition of pervious concrete seems simple, it is not easy to achieve good mechanical properties and a satisfactory pore system at the same time. Decreasing the water to cement ratio and increasing the cement amount in the concrete mixture will result in better mechanical properties in the case of regular concrete. However, the increase of the amount of cement in pervious concrete will reduce or even completely prevent its ability to infiltrate water, which is its main advantage. Pervious concrete as a material was used for the first time in 1852 and patented in 1980. Although it is not a new technology, pervious concrete is receiving renewed interest today. Namely, poor mechanical properties, low abrasion and freeze-thaw resistance are characteristics of pervious concrete interesting to scientists even today. Therefore, this paper deals with improving mechanical properties of pervious concrete by using polymer. Four mixtures of pervious concrete without and with polymer incorporated were prepared and their properties in hardened state compared to each other. It was concluded that polymer can significantly improve compressive strength of pervious concrete.

pervious concrete, mechanical properties, polymer, porosity, compressive strength

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