Eco-friendly Pavement Blocks of Waste Glass, Fly Ash, and Dust
Introduction
Pavement blocks, which are industrial products of pre-fabricated unarmed concrete, having various dimensions and special morphology, are used for pavement laying of residential projects carrying pedestrian and light vehicular traffic. Cement concrete paving blocks are precast solid products made of cement concrete. The product is made in various sizes and shapes viz. rectangular, square and round blocks of different dimensions with designs for interlocking with adjacent tiles blocks. The raw materials required for manufacture of the product are Portland cement and aggregates which are available locally in every part of the country. This paper presents a brief review of relevant researches on Pavement Blocks for influencing their properties. Johnson[1] carried a parametric experimental study for producing paving blocks using waste glass as fine as well as coarse aggregate.Shayan and Xu[2] reported fine glass powder for incorporation into concrete up to 30% as a pozzolanic material suppressed the Alkali Silica Reaction. Topcu and Canbaz[3] reported the waste glass in size of 4-16 mm used as aggregate in the concrete to find reduced compressive strength of concrete. Tuncan et al[4] showed the addition of waste glass powder (15%) into concrete increased the compressive strength of concrete as much as 13%. Kısacık[5] also reported the compressive strength of concrete with waste glass decreased 19%. Park et al[6] has study of 30% of waste glass with size of 0-5 mm addition into concrete decreased the compressive strength of concrete as much as 4%. Sangha et al.[7] investigated the effect on concrete strength of green glass as an aggregate replacement. They observed that increases in the compressive strength values at the 10%, 40%, and 60% aggregate replacement by waste glass with 0- 10 mm particle size were 3%, 8% and 5% as compared with control sample without waste glass but decrease in the compressive strength value was 2% at the 20% replacement.This is a premium article available exclusively for our subscribers.
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NBM&CW March 2014
