| 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/m3，78MPa及0156W/(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. |
| 关键词: 生土 泡沫混凝土 导热系数 抗压强度 吸湿特性 |
| DOI：103969/jissn1007 9629201501001 |
| 分类号: |
| 基金项目: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) |
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| Experimental Research on Immature Soil Based Foam Concrete |
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CHEN Bing, HU Huajie, LIU Ning
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Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China
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| Abstract: |
| Immature soil was used as filler to prepare immature soil based foam concrete.The properties, such as dry apparent density, compressive strength, thermal conductivity, pore structure and moisture absorption characteristic of immature soil based foam concrete were experimentally researched.The effect of silica fume on compressive strength and thermal conductivity of immature soil based foam concrete was studied as well. The experimental results indicate that the dry apparent density, compressive strength and thermal conductivity of immature soil based foam concrete decrease with increasing use level(by volume) of foam. The compressive strength and thermal insulation of immature soil based foam concrete are both improved with increasing use level(by mass) of silica fume. Moreover, the immature soil based foam concrete(60% foam) with a dry apparent density of 790kg/m3, compressive strength of 78MPa, and thermal conductivity of 0156W/(m·K) is produced to use immature soil as filler and with addition of 20% silica fume. Nanoscale pore volume of immature soil based foam concrete with 75% foam(without silica fume added) is low, and its moisture absorption ability is low also. |
| Key words: immature soil foam concrete thermal conductivity compressive strength moisture absorption characteristic |
