江西生土结构房屋材料改性试验研究  

Experimental study on the modification of raw-soil structure building materials in Jiangxi Province

作　　者：陈宝魁 田洪祥 文明[1] 李晓东[1] CHEN Baokui;TIAN Hongxiang;WEN Ming;LI Xiaodong(School of Infrastructure Engineering,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学工程建设学院,江西南昌330031

出　　处：《南昌大学学报（工科版）》2022年第3期225-233,共9页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(51868048);中国地震局工程力学研究所基本科研业务费专项资助项目(2018D18)。

摘　　要：生土结构房屋在我国农村分布广泛,其具有造价低廉、热工性能优异等优点,也存在抗震性能差、墙体易开裂等缺陷。为从根本上改善生土材料的力学性能,对江西省内的红黏土进行物理与化学改性,并通过试验分析了本地区生土材料性能的提升效果与改性机制。试验得到水泥、石灰的最优掺量均为10%,试样7 d抗压强度分别提高了3.48倍、2.61倍,生成的水化产物能显著提高改性生土材料的力学性能。聚酯纤维、稻草的最优掺量分别为0.8%、0.2%,试样28 d抗压强度分别提高了1.56倍、0.49倍,掺入的纤维材料不仅可以提高土体的强度和延性,还能使土体在破坏后保持较完整的状态。The raw-soil structure houses are widespread in the rural areas of China,which have the advantages of low cost,excellent thermal performance,but also have the defects of poor seismic performance and easy cracking of walls.To fundamentally improve the mechanical properties of the raw-soil materials,the red clay in Jiangxi Province was modified physically and chemically,and the improvement effect and modification mechanism of the raw-soil materials were analyzed through experiments.The results showed that the optimal dosage of cement and lime were both 10%,and the 7 d compressive strength of the samples was increased by 3.48 times and 2.61 times,respectively.The hydration products can significantly improve the mechanical properties of the modified raw-soil materials.The optimum dosages of polyester fiber and straw were 0.8%and 0.2%,separately,and the 28 d compressive strength of the samples was increased by 1.56 times and 0.49 times,respectively.The fiber material can not only improve the strength and ductility of the soil but also keep the soil intact after destruction.

关 键 词：生土材料 改性试验 村镇房屋 结构抗震 配合比 

分 类 号：TU361[建筑科学—结构工程]