Abstract
AbstractThe aim of this study is to investigate the effect of variation of cement content, partial replacement of cement by 10 and 20% of fly ash, partial replacement of coarse aggregate by fine aggregates (ranging from 5 to 15%) with the addition of plasticizer on the characteristics of pervious concrete. Class C fly ash was used for the production of pervious concrete, adopting ACI method of mix proportioning. Coarse aggregates of size 19 to 9.5 mm and 9.5 to 4.75 mm blended in the ratio of 60:40 respectively, a constant water—binder ratio of 0.3, a plasticizer of 0.8% by weight of cement were adopted. Density, compressive strength, flexural strength, split tensile strength, total voids, permeable voids, permeability by falling head method, sand blasting abrasion and cantabro abrasion were determined. Replacement of cement by fly ash (up to 20%) has reduced the compressive strength marginally, whereas, addition of fine aggregates (5–15%) has increased the above strength ranging from “marginal” to “high”...
Highlights
Pervious concrete is a unique and effective means of addressing a number of environmental issues and supporting sustainable development
The results of this work are compared with the salient results of an earlier work of the authors (Uma Maguesvari & Sundararajan, in press), restricting the comparison only for the cement content of 250 kg/m3, and to the tests results of: compressive strength, permeability and total voids, to highlight the role of plasticizer in pervious concrete. 3.1
It can be seen that the compressive strength of pervious concrete, increases with increase in cement content and that the strength ranges from Figure 4
Summary
Pervious concrete is a unique and effective means of addressing a number of environmental issues and supporting sustainable development. Several studies have been conducted to evaluate the strength and permeability of pervious concrete, using various cement content, different type of aggregates and with different water cement ratios (Girish & Manjunath Rao, 2011; Kevern, Wang, & Schaefer, 2009; Lian & Zhuge, 2010; Ravi Shankar & Palankar, 2015). In addition to the above, super plasticizer, polymer, fibers, silica fume and other admixtures have been added to enhance the properties of pervious concretes (Huang, Wu, Shu, & Burdette, 2010; Lian & Zhuge, 2010; Ravi Shankar & Palankar, 2015; Rafique, Bhutta, Tsuruta, & Mirza, 2012). The loaded wheel test and Cantabro test have been used to evaluate the abrasion resistance of pervious concrete (Dong, Wu, Huang, Shu, & Wang, 2013)
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