二氧化锰对超轻泡沫混凝土物理力学性能的影响

摘要

为了提高双氧水分解反应速度和效率,采用MnO2作为双氧水的催化剂,研究MnO2催化剂对超轻泡沫混凝土吸水率、干密度和抗压强度的影响.试验结果表明,MnO2用量为双氧水用量0.05%时,催化剂对超轻泡沫混凝土的吸水率、干密度和抗压强度影响较小;当MnO2用量增加到双氧水用量的0.1%~0.2%时,超轻泡沫混凝土吸水率和干密度明显下降,但抗压强度反而有所增大;当MnO2用量超过双氧水用量的0.3%后,对超轻泡沫混凝土的物理力学性能产生了明显不利的影响.采用双氧水作为发泡剂时,MnO2的适宜用量为双氧水质量的0.1%~0.2%.%In order to improve the decomposition reaction speed and efficiency of hydrogen peroxide, the paper intro?duces a test method which uses MnO2 as a catalyst for hydrogen peroxide, and studies the impact of MnO2 catalyst on the water absorption, dry density and compressive strength of lightweight foam concrete.