The compressive strength study and the mortar standard compliance inspection of waste bakelite mortar and conventional mortar

Abstract

Bakelite material has been used to produce as various components for cars and consumer products industry in Thailand. The more car and consumer industrial production the more Bakelite waste generation. Bakelite waste is prohibited to dispose for sanitary landfill and direct burning. This waste management becomes necessary issue. There are many applications of concrete product such as ready mixed concrete, pre-casted concrete and mortar etc. The application of Waste Bakelite plastic to replace natural fine aggregate in mortar mixture is one of plastic waste management approach to mitigate the pollution problem in environment as well as preserve the natural resource by the reduction of natural sand usage in a cement mortar. Cement Mortar is composed of cement, sand and water mixed together generally used for masonry work especially in wall plastering, floor leveling work and applied as the core material for manufacturing of wall brick and floor tile. Consequently, the consumption of mortar is still high as long as construction project is growing. There are some studies of recycled plastic mixed in concrete and mortar but there is insufficiently study data of Waste Bakelite Mortar (WBM). This study of Waste Bakelite Mortar (WBM) was done by the inspection of the compressive strength of mortar specimens and find the correlation between Waste Bakelite Fine Aggregate (WBFA) content and compressive strength of the mortar by preparing and testing mortar specimens with 0% 20 % 40%80% and 100 % sand replacement percentage at each curing age 7 14 and 28 days based on testing standard of American Society of Testing Material (ASTM), comparing test results with Thai Industrial Standard(TIS 1776-2542) allowable compressive strength of plastering cement mortar. The specimen test results shown that the WBM compressive strength and density was lower than Conventional Mortar (CM). The correlation between Waste Bakelite Fine Replacement percentage and the compressive strength and the density of Waste Bakelite Mortar can be represented by a linear regression equation. The optimized replacement percentage to meet TIS 1776-2542 minimum compressive strength can be determined by this equation. The compressive strength of WBM can be predicted by the density of WBM mortar with quadratic equation model. The Bakelite Waste utilization in cement mortar by the natural material replacement is possible in strength inspection and sustainable waste management approach.