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发泡混凝土自保温砌块作为墙体砌筑材料,其抗压强度是检验其能否符合国家标准的重要因素之一。通过文献查阅和前期试验,筛选出浓度为27%的双氧水作为发泡剂,水泥、粉煤灰为胶凝材料,硬脂酸钙、聚羧酸等外加剂制备发泡混凝土。然后将密度等级为200、250和300的发泡混凝土芯材和密度等级为500、700和900的发泡混凝土基材进行复合,复合基材的厚度分别为25、30和35 mm,选用正交设计L_9(3~4),安排试验方案制作9组发泡混凝土自保温砌块,通过试验的测试及数据分析,确定对抗压强度影响最大的因素。
Foam concrete self-insulation block as a wall masonry material, its compressive strength is to test whether it can meet the national standard one of the important factors. Through literature review and pre-test, the concentration of 27% hydrogen peroxide as blowing agent, cement, fly ash as cementitious material, calcium stearate, polycarboxylic acid and other additives to prepare foam concrete. The foamed concrete cores with densities of 200, 250 and 300 were then compounded with foamed concrete substrates with densities of 500, 700 and 900. The composite substrates were 25, 30 and 35 mm thick, respectively, using positive Design L_9 (3 ~ 4), arrange the experimental plan to make 9 groups of foam concrete self-insulation block, through the test and data analysis to determine the factors that have the greatest impact on the compressive strength.