Abstract
In this study an attempt is made to investigate the properties and CBR characteristics of fine sand and waste dust from construction debris. Attempts are also made to study the effect of soaking period on CBR value of waste dust from construction debris. Waste dusts passing through 600 µm sieve from construction debris and river sand are selected for investigation. Standard Test procedures specified by AASHTO are followed in this investigation. The testing includes the determination of specific gravity, sieve analysis, optimum moisture content, dry density and CBR value. Dense unit weight, specific gravity and fineness modulus of construction debris is 1273.44 Kg/m<sup>3</sup>, 2.43 and 1.36 respectively and for fine sand 1132.25 Kg/m<sup>3</sup>, 2.62 and 1.64 respectively. Un-soaked CBR value of construction debris and fine sand are 10.36% and 12.5% respectively. Soaked CBR values of construction debris and fine sand are 5.36% and 6.07% respectively. The study reveals that waste dust from construction debris is as good as fine sand for construction of sub-grade from the stand point of properties and CBR characteristics.
Highlights
The recycled waste materials are usually generated from Construction and Demolition (C&D) or mercantile and industrial works
The test were performed to determine the compacted unit weight, specific gravity, fineness modulus (FM), gradation, optimum moisture content (OMC) and maximum dry density according to the procedure specified by ASTM standard
On the basis of experimental results of this study, it can be recapitulated that waste dust passing through 600 μm sieve from construction debris is suitable as sub-grade soil from the consideration of physical properties
Summary
The recycled waste materials are usually generated from Construction and Demolition (C&D) or mercantile and industrial works. Though Construction and Demolition (C&D) waste is one of the vital reasons of environment pollution, the reuse of such salvage materials can be cost effective and available in ample quantity in pavement construction. The origination of Construction and demolition waste (CDW) debris is raised remarkably in recent years, and it affects on environment adversely due to its improper management system. Recycling of these debris materials becomes the great concern to mitigate the nocuous effect on environment and objective of sustainable prosperity [16]. Research on recycling of construction waste material ensure that reuse of these elements have high potentiality as aggregate in pavement construction. Recycled materials derived from construction debris can be used as replacement of virgin aggregate in the pavement layer construction of highway as unbound material [3]
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