| 摘要: |
| 以生土、水泥、聚羧酸减水剂及自制微生物发泡剂为原材料，采用先预制气泡再与水泥浆体混合的方法，制备了不同密度等级的生土泡沫混凝土，研究了泡沫掺量对生土泡沫混凝土干密度、抗压强度、导热系数、吸水率及其孔结构的影响.结果表明：当水泥用量为128.4~583.4 kg/m3，生土用量为64.2~291.7 kg/m3，减水剂用量为0.6~3.0 kg/m3，泡沫掺量为固体材料总质量的6.1%~26.4%时，制成了300~1 200 kg/m3密度等级的生土泡沫混凝土，其抗压强度为0.8~10.3 MPa，导热系数为0.08~0.27 W/（m·K），吸水率为6.5%~67.7%，满足泡沫混凝土的相关性能要求. |
| 关键词: 生土 微生物发泡剂 干密度 抗压强度 导热系数 |
| DOI：10.3969/j.issn.1007-9629.2022.02.013 |
| 分类号:TU528.2 |
| 基金项目:“十三五”国家重点研发计划（2018YFD1101002） |
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| Preparation and Performance of Raw Soil Foam Concrete |
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ZHANG Lei1,2, ZHAO Zhuoyue1, ZHANG Nan3, RONG Hui1,2, YUE Changsheng4
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1.School of Materials Science and Engineering ， Tianjin Chengjian University， Tianjin 300384， China;2.Tianjin Key Laboratory of Building Green Functional Materials， Tianjin Chengjian University， Tianjin 300384， China;3.Department of Architecture and Civil Engineering， Chengde Petroleum College， Chengde 067000，China;4.Central Research Institute of Building and Construction， MCC Group Co.， Ltd.， Beijing 100088， China
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| Abstract: |
| Using the raw soil and Portland cement， polycarboxylic series of water reducing agent and biological based foaming agent， the raw soil foam concrete with different density levels were prepared by pre-foam and mixed. The properties such as compressive strength， thermal conductivity， water absorption ratio and pore structure of raw soil foam concrete were investigated. The results show that when the cement content is 128.4-583.4 kg/m3， the raw soil content is 64.2-291.7 kg/m3， the water reducing agent content is 0.6-3.0 kg/m3 and the foam content is 6.1%-26.4% of solid material mass， the corresponding density grade of the raw soil foam concrete is 300-1 200 kg/m3， the compressive strength is 0.8-10.3 MPa， the thermal conductivity is 0.08-0.27 W/（m·K）， and the water absorption ratio is 6.5%-67.7%. The raw soil foam concrete meets the relevant performance requirement for foam concrete. |
| Key words: raw soil biological based foaming agent dry density compressive strength thermal conductivity |
