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利用工业废弃物粉煤灰中的漂珠(FACs)、P·O42.5R水泥、植物蛋白发泡剂和电厂粉煤灰为原料,采用物理发泡法制备500 kg/m~3的泡沫混凝土。运用流变仪、SEM、XRD等测试方法及图像分析软件对试样气孔结构及分布进行表征,并探讨了FACs对浆体工作性、泡沫混凝土的强度及导热系数的影响。结果表明:掺2.8%FACs时的泡沫混凝土试样小于400μm孔的气孔比例为94.94%,气孔平均直径为174.39μm,28 d抗压强度达到3.38 MPa,导热系数为0.1117 W/(m·K);过量的FACs(>2.8%)会使硬化泡沫混凝土小于50μm的气孔增加,并增加开口孔隙率;掺3.5%FACs的泡沫混凝土试样28 d抗压强度为2.87 MPa,导热系数为0.1079 W/(m·K)。
Foam concrete (500 kg / m ~ 3) was prepared by physical foaming method using floating beads (FACs), P · O42.5R cement, plant protein foaming agent and power plant fly ash in industrial wastewaters as raw materials . The pore structure and distribution of the samples were characterized by means of rheometry, SEM, XRD and image analysis software. The effects of FACs on the workability of slurry, the strength of foam concrete and the thermal conductivity were also discussed. The results show that the stomatal ratio of foam concrete samples less than 400μm with doped FACs is 94.94%, the average pore diameter is 174.39μm, the compressive strength at 28 d is 3.38 MPa and the thermal conductivity is 0.1117 W / (m · K) ; Excess FACs (> 2.8%) will increase the porosity of the cured foam concrete less than 50μm and increase the open porosity. The compressive strength of foam concrete specimens with 3.5% FACs at 28 days is 2.87 MPa and the thermal conductivity is 0.1079 W / (m · K).