研究了掺入废旧橡胶颗粒及废旧聚氨酯颗粒的改性水泥砂浆的机械性能和导热系数。以体积比0,10%和30%的废旧橡胶颗粒及废旧聚氨酯颗粒代替石英砂配制出几种改性砂浆,通过试验检测了橡胶颗粒及聚氨酯颗粒掺合物对新拌砂浆的质量抗压强度抗弯强度和导热性能的影响,并通过掺加石灰石粉末作为填料得到最优化的改性砂浆配比。结果表明,掺入橡胶颗粒及聚氨酯颗粒降低了材料的单位重量和导热系数,同时增强了隔热性能。%The mechanical behaviour and thermal conductivity of cement mortar with either sole rubber (SR) or polyurethane (PU) waste particles are studied. Several mortar mixtures are prepared by replacing quartz sand with 0, 10%, and 30% of either SR or PU post-consumer plastic particles. The influences of SR particle or PU particle on the quality, compressive strength, flexural strength and thermal conductivity of the fresh mortar are tested. An optimization of mortar mixture proportions is carried out by adding a limestone powder as filler. The study results show that adding the rubber particles and PU particles in cement mortar can reduce both unit weight and the thermal conductivity of the raw mortar, and reinforce its theat-insulating property.
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