| 摘要: |
| 通过未改性生土材料、水泥改性生土材料、黄麻改性生土材料和水泥/黄麻复合改性生土材料的毛细吸水试验，研究了改性方法对生土材料毛细吸水速率、毛细吸收系数和表面渗入深度等水分传输参数的影响及其作用机理.结果表明：生土材料的毛细吸水量与时间平方根呈线性关系；水泥改性生土材料的毛细吸收系数和初始吸水速率较未改性生土材料的毛细吸收系数和初始吸水速率分别降低198%和253%，而黄麻改性生土材料的毛细吸收系数和初始吸水速率分别提高了434%和262%；黄麻纤维明显提高了生土材料水分的表面渗入深度；水泥改变了黄土颗粒表面状态和生土材料的孔结构，从而影响了生土材料的水分传输特性. |
| 关键词: 生土材料 改性 水分传输 毛细吸收系数 |
| DOI：103969/j.issn1007 9629201806024 |
| 分类号: |
| 基金项目:河南省教育厅重点科研计划资助项目（18A5600004） |
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| Influence of Modification on Characteristics of Moisture Transportation of Earth Materials |
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LIU Junxia1, WU Xiaobo1, ZHANG Maoliang2, WANG Shuaiqi1, HAI Ran1
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1.College of Architectural Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China;2.Henan Building Materials Research and Design Institute Co., Ltd., Zhengzhou 450002, China
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| Abstract: |
| The influence of modification on the characteristics of moisture transportation of earth materials was discussed. Development of capillary absorption rate, capillary absorption coefficient and surface infiltration depth with different modification methods, such as modified by cement, by jute and by composite of above two, was researched through capillary absorption test. The results show that there exists linear relationship between capillary absorption quantity and square root of time. Comparing with original earth materials, capillary absorption coefficient and initial absorption rate of cement modified earth material is reduced by 198% and 253% respectively, and while that of jute modified earth material is increased by 434% and 262%. Modification of jute on surface penetration depth of original earth materials is obvious.The pore distribution of earth materials and surface state of soil particles is changed due to the modification effect of cement, and therefore, moisture transportation characteristics of earth materials is accordingly changed. |
| Key words: earth material modification moisture transmission capillary absorption coefficient |
