The use of fine portions from construction and demolition waste for expansive soil stabilization: A review

Abstract

Construction and demolition waste (CDW) are the largest waste products in the world today and competes as a viable recycled additive material in place of natural aggregates. Due to the increase in compressive strength of different mix proportions of CDW, it is also considered for reuse in concrete and subbase construction. This study shows the effect of CDW in expansive soil stabilization. The chemical and mechanical properties of these materials have shown that they are capable of developing compressive strength properties for replacement of cement with significant reduction in carbon emission. The inherent compositional properties of recycled CDW compared in this review suggests that CDW have good filler properties in highly expansive soils. Mixtures of crushed brick and recycled aggregates characterised based on chemical properties of different replacement ratios suggests that CDW of good-quality aggregates reduces swell potential of expansive soils and increased mechanical strength in pavement construction.

Design of Industrial Mg-Rich Gypsum Waste with Concrete Waste Aggregate for Compressibility of Problematic Soil

“…The concrete waste aggregate was crushed manually by using a steel hammer and sieved to the desired size. The particle size of concrete waste aggregate was consistently prepared in the range between 1 mm to 2 mm size as similar as the size tested by the previous study [23]. The consolidation test was tested for both untreated peat and treated peat soil mixed with the gypsum and concrete waste aggregate additive based on ratio that previously determined from the UCS test.…”