Experimental Study on the Strength of Cement Mortar with Modified Rubber
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Abstract:
The rubber was modified with several approaches, including washing, NaOH solution, KH570 solution, and homemade Na2SiO3 solution, and the experiments were conducted to investigate the impacts of different modification approaches on the strength of rubberized mortar. The test results showed that 10% NaOH solution has the best modification effects with 16.89% and 46.56% of increasing in the compressive strength and splitting tensile strength, respectively compared to the benchmark rubberized mortar. . The observation results using the electron microscope with a magnification of 1000 showed that after the modification with NaOH solution, the cleanliness and pores of the rubber surface increase, and the occlusion degree with cement reinforces, which explained the increasing strength mechanism of the cement mortar with modified rubber from the microscopic scale.
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