碳酸钙晶须对碱激发高炉矿渣保温材料性能的影响

摘要

Using blast furnace slag as main raw material,NaOH as an activator,hydrogen peroxide as a pore-forming a-gent,and CaCO3 whisker as a modified material,a new inorganic thermal product was prepared. The influence of CaCO3 whisker dosages on physical properties of the ma-terial was discussed. The test results showed that with the quality of blasé furnace slag as a base mark,the prepared materials with thermal conductivity coefficient of 0. 081 W/m·K,compressive strength of 1. 15 MPa and bulk density at 0. 52 g/m3 were obtained under conditions of NaOH 6%,H2 O22%,water-solid ratio 0. 5 g/mL with the addition of CaCO3 whisker 3% ( curing for 28 d) .%以高炉矿渣为主要原料,氢氧化钠为碱激发剂,双氧水为发泡剂,碳酸钙晶须为改性剂制备新型无机保温材料.探讨了碳酸钙晶须掺量对所制取保温材料物理性能的影响.试验结果表明:以高炉矿渣质量为基准,在碱激发剂氢氧化钠和发泡剂双氧水添加量分别为6%和2%、水固比为0.5 g/mL的情况下,添加3%的碳酸钙晶须的试件(养护时间为28 d)体积密度为0.52 g/m3,抗压强度为1.15 MPa,导热系数为0.081 W/m·K,该材料的物理性能达到保温材料的标准.