Properties of a foamed concrete with soil as filler
Properties of a foamed concrete with soil as filler
复制标题
以土为填料的泡沫混凝土的性能
DOI：
10.1016/j.conbuildmat.2014.11.066
复制
发表时间：
2015-02-01
影响因子：
7.4
通讯作者：
Bing, Chen
中科院分区：
文献类型：
--
作者：
Cong, Ma;Bing, Chen
普通波特兰水泥、土和发泡剂是制作土基泡沫混凝土的原材料。研究了泡沫掺量和硅灰掺量对土基泡沫混凝土干密度、28 d抗压强度、导热系数、耐水性和孔结构等物理性能的影响。试验结果表明，泡沫和硅灰掺量对土基泡沫混凝土的物理性能有较大影响。随着泡沫体积分数的增加，导热系数、密度、耐水性和抗压强度降低。随着硅灰掺量的增加，混凝土的抗压强度、保温性能和耐水性能均有所提高。土基泡沫混凝土由20%的硅灰组成，密度为800 kg/m3，抗压强度为7.5 MPa，导热系数为0.16 W/m K，可用作防水轻质混凝土。结果表明，硅灰的掺入对土基泡沫混凝土的吸湿性能有一定的影响。得到了几条拟合曲线，其中Kumaran模型和三次函数拟合的拟合函数具有较好的拟合参数。(C)2014爱思唯尔有限公司版权所有。
Ordinary Portland cement, soil and foaming agent are the raw materials used to make soil-based foamed concrete. The effects of foam content and silica fume on the physical properties of soil-based foamed concrete, such as the dry density, 28-day compressive strength, thermal conductivity, water resistance and pore structure, were studied. The experimental results indicate that the foam and silica fume contents have a large impact on the physical properties of soil-based foamed concrete. The thermal conductivity, density, water resistance and compressive strength decrease with increasing volume fractions of foam. The compressive strength, the thermal insulation and water resistance are all improved by increasing the content of silica fume. Soil-based foamed concrete consisting of 20% silica fume with a density of 800 kg/m(3), compressive strength of 7.5 MPa and thermal conductivity of 0.16 W/m K can be used as water-resistant lightweight concrete. The hygroscopic tests were performed and the results indicate that the addition of silica fume has some effect on the hygroscopic property of soil-based foamed concrete. Several fitting curves have been obtained, the fitted functions developed by the Kumaran model and Cubic function have better fitting parameters. (C) 2014 Elsevier Ltd. All rights reserved.