Study on Pervious Concrete by Partial Replacement of Silica Fume and GGBS with Cement and Addition of Glass Fibers

Abstract

Pervious Concrete for the pavements proves to be an effective and along- term solution for the universal problem of abnormal decrease of ground water table. Pervious Concrete has a unique mix design and giving special properties to the concrete which makes the concrete porous , allowing water from precipitation and other sources to pass directly through , there by reducing run off volume and increasing ground water table. Inorder to reduce the damage being caused to the environment by the use of cement , inpervious concrete , cement is replaced with pozzolanic materials such as GGBS , silica fume sand to increase strength and durability , glass fibers in stipulated ratio are added to the concrete mixture. In this study ,the mix designs such as M30 and PC30 are considered . The fine aggregate is replaced with coarseaggregate by different ratios like 0% , 5% , 10% ,15%. by adding different pozzolanic matrals like GGBS, silicafume with glassfibers. To find the effectiveness of the use of pozzolancic and glassfibes, compressive strength conducted. The following Conclusions can be summarized by analyzing tests performed on PC specimens. A significant reduction of workability. And A progressive addition in compressive strength by increasing the percentage of fine aggregates and pozzolanic materials in mix. The conclusion of fine aggregate content in the specimen increases the density and increase the pozzolanic materials addition. And addition of silica fume and GGBS in the mixtures improve strength , compressive strength increases even after adding pozzolanic materials. Due to increase of fine aggregate content. For all replacement levels of PC with other mixes goes on decreasing in strength when compared with parent grade ofM30. While comparing with PC with Pozzolanic materials, For 7 days there is a drastic change for same replacement, and for 28 days itshowssimilar trend for 25% pozzolanic concrete and goes on decreasing for strength for compressive strength. For all replacement levels of PC with pozzolanic goes on decreasing in strength when compared with parent grade of M30. Compressive strength slightly increased by adding glass fibers to the allmixes.