轻骨料再生橡胶保温砂浆的制备及性能研究

Study on preparation and performance of lightweight aggregate regenerate rubberize thermal mortar

利用膨胀珍珠岩和废旧轮胎橡胶粉制备了轻骨料保温砂浆,通过外掺膨胀珍珠岩和橡胶粉,改善了砂浆的保温性能和抗渗透性能,并可以增强砂浆的阻尼性能。研究表明,在m(水泥)∶m(砂子)∶m(膨胀珍珠岩)∶m(橡胶粉)=500∶333∶13.5∶25(kg/m^3)时,砂浆的抗压强度为7 MPa,抗折强度为4 MPa,电通量为2450 C,导热系数为0.278 W/(m·K),损耗因子为2.76%。经过对试块在600℃高温煅烧2 h后的SEM照片的对比发现,砂浆的耐高温性能良好,可作为建筑外墙保温砂浆使用。

Expanded perlite and waste tire rubber had been used to prepare light aggregate thermal insulation mortar, the ther- mal insulation,penetration resistance and damping properties of mortar had been improved by mixed perlite and rubber powder. The study showed that： in the condition of mixed concrete 500 kg/m3,sands 333 kg/m3 with 13.5 kg/m3 perlite and 25 kg/m3 rubber powder, the mortar press strength was 7 MPa, rupture strength was 4 MPa, electric flux was 2450 C,thermal conductivity was 0.278 W/（m＇K）, damping factor was 2.76%. The mortar briquette was watched before and after 600℃ for 2 h through SEM,proved it had better temperature resistance and can be used as building exterior wall thermal insulation.