Abstract
Pervious concrete is a light weight concrete containing voids in the range of 14 to 31%. The usage of pervious concretes has been in- creased due to its merits on pollution control and environmental considerations. The pervious concretes are also used to reduce the storm water runoff and recharges the underground water table. Eventhough the pervious concrete has lot of merits, it also has consider- able demerits related to strength issues. In order to achieve the strength high cement content mixes may be incorporated which is not a viable solution. In this paper, geopolymer technology has been used to develop pervious concrete. Geopolymer pervious concrete is pro- duced using GGBS as raw material and sodium hydroxide and sodium silicate as activator solution. Five mixes have been developed with varying GGBS content of 450, 460, 470, 480 and 490 kg/m3. The cement to aggregate ratio is fixed at 1:3 for all the mixtures and the water cement ratio is kept constant at 0.3. The compressive strength revealed that strength of around 20 MPa was attained for all the mixtures and strength increases with respect to the increase in GGBS content. There was not significant changes in the permeability property since the aggregate cement ratio is maintained for all the mixtures.
Highlights
Pervious concrete is a light weight concrete consisting of coarse aggregate, Portland cement, and water
This research paper mainly aims at developing geopolymer pervious concrete with GGBS as raw material and sodium hydroxide and sodium silicate as activator solution and studying its mechanical and per- meability properties
The following conclusion can be drawn from the investigation carried out on geopolymer pervious concrete (GPC) mixtures
Summary
Pervious concrete is a light weight concrete consisting of coarse aggregate, Portland cement, and water. Malhotra [2] performed experiments on pervious concrete to find the corre- lation between compressive strength and mix design parameters He concluded that compressive strength depends on the water cement ratio and the aggregate cement ratio. Shu et al [5] compared the performance of laboratory and field produced pervious concrete mixtures Their results showed that the pervious concrete mixtures made with latex exhibited lower porosity and permeability, higher compressive and split tensile strengths, and higher abrasion resistance than those without latex. Sata et al [7] studied the performance of pervious geopolymer concrete using recycled aggregate They stated that it is feasible to use Recycled concrete (RC) and Recycled brick (RB) as recycled coarse aggregates with highcalcium fly ash geopolymer binder for making pervious concrete with acceptable properties. This research paper mainly aims at developing geopolymer pervious concrete with GGBS as raw material and sodium hydroxide and sodium silicate as activator solution and studying its mechanical and per- meability properties
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