生土泡沫混凝土试验研究
发布时间：2019-02-12 19:07
【摘要】：以生土作为填料,制备了生土泡沫混凝土.试验研究了生土泡沫混凝土的干表观密度、抗压强度、导热系数、孔隙分布和吸湿特性,探讨了微硅粉对生土泡沫混凝土抗压强度和导热系数的影响.结果表明:生土泡沫混凝土干表观密度、抗压强度和导热系数均随着泡沫掺量(体积分数)的增大而减小;随微硅粉掺量(质量分数)增大,生土泡沫混凝土抗压强度和保温隔热性能同时得到改善.利用生土作填料,同时掺加20%微硅粉,可以制备出干表观密度、抗压强度和导热系数分别为790kg/m3,7.8MPa及0.156W/(m·K)的性能优异的生土泡沫混凝土(泡沫掺量为60%).泡沫掺量75%的生土泡沫混凝土(未掺微硅粉)的纳米级孔隙量低,吸湿能力小.
[Abstract]:Raw soil foam concrete was prepared by using raw soil as filler. The dry apparent density, compressive strength, thermal conductivity, pore distribution and moisture absorption characteristics of raw soil foamed concrete were studied. The influence of micro-silica powder on compressive strength and thermal conductivity of raw soil foam concrete was discussed. The results show that the dry apparent density, compressive strength and thermal conductivity of raw soil foam concrete decrease with the increase of foam content (volume fraction). The compressive strength and thermal insulation properties of raw soil foamed concrete are improved with the increase of the content (mass fraction) of micro-silica fume. The dry apparent density can be prepared by using raw soil as filler and adding 20% microsilica powder. The compressive strength and thermal conductivity are 790 kg / m ~ (3) MPA and 7.8 MPA respectively, and the 0.156W/ (m K) has excellent properties of raw soil foam concrete (foam content is 60%). The nanometer porosity and moisture absorption ability of raw soil foam concrete with 75% foam content (without microsilica powder) are low.
【作者单位】： 上海交通大学土木工程系;
【基金】：国家自然科学基金资助项目(51378309) “十二五”国家科技支撑计划项目(2014BAL03B03-01)
【分类号】：TU528.2
[Abstract]:Raw soil foam concrete was prepared by using raw soil as filler. The dry apparent density, compressive strength, thermal conductivity, pore distribution and moisture absorption characteristics of raw soil foamed concrete were studied. The influence of micro-silica powder on compressive strength and thermal conductivity of raw soil foam concrete was discussed. The results show that the dry apparent density, compressive strength and thermal conductivity of raw soil foam concrete decrease with the increase of foam content (volume fraction). The compressive strength and thermal insulation properties of raw soil foamed concrete are improved with the increase of the content (mass fraction) of micro-silica fume. The dry apparent density can be prepared by using raw soil as filler and adding 20% microsilica powder. The compressive strength and thermal conductivity are 790 kg / m ~ (3) MPA and 7.8 MPA respectively, and the 0.156W/ (m K) has excellent properties of raw soil foam concrete (foam content is 60%). The nanometer porosity and moisture absorption ability of raw soil foam concrete with 75% foam content (without microsilica powder) are low.
【作者单位】： 上海交通大学土木工程系;
【基金】：国家自然科学基金资助项目(51378309) “十二五”国家科技支撑计划项目(2014BAL03B03-01)
【分类号】：TU528.2
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