生土快速熟化方法对夯土制品性能的影响  

The Influence of Rapid Ripening Method for Raw Soil on Performance of Rammed Earth Products

作　　者：余海燕[1] 石峻尧 程海平[1] 杨久俊[1] YU Haiyan SHI Junyao CHENG Haiping YANG Jiujun(School of Materials Science and Engineering, TCU, Tianjin 300384, Chin)

机构地区：[1]天津城建大学材料科学与工程学院,天津300384

出　　处：《天津城建大学学报》2017年第1期34-39,共6页Journal of Tianjin Chengjian University

基　　金：国家科技支撑计划项目(2014BAL03B03)

摘　　要：采用冻融循环、挤出练泥、干湿循环、滚轴碾压等方法对生土进行快速熟化处理,研究了各种快速熟化方法对生土的工艺性能、颗粒组成及夯土制品体积稳定性、力学性能等的影响.研究结果表明:4种快速熟化方法均不同程度提高了生土的黏粒质量分数和塑性指数,改善了夯土制品的体积稳定性和力学性能.其中,滚轴碾压熟化方法效果最佳,当碾压次数达到21次时,生土的黏粒质量分数提高了11.4%,塑性指数提高了2倍,夯土制品的体积收缩降低至1.37%,干密度和强度分别可以达到1 958 kg/m3和6.7 MPa.The raw soil was ripened rapidly with the methods of freezing and thawing cycle, extrusion pug, dry-wet cycle and roller rolling to study the influence of the technological properties of various rapid ripening methods on raw soil, grain composition,volume stability of rammed earth products and mechanical property etc. The results show that： the clay particle mass fraction and plasticity index of raw soil were improved by adopting the above four rapid ripening methods. Meanwhile, the volume stability and mechanical property for rammed earth products were both improved. Roller rolling ripening method worked best. When roiling frequency reached 21 times ,raw soil＇s clay particle mass fraction was increased by 11.4% ,plastic index was increased 2 times,the volume shrinkage of rammed earth products was reduced up to 1.37% ,dry density and strength reached 1 958 kg·m^-3 and 6.7 MPa respectively.

关 键 词：夯土 熟化方法 塑性指数 收缩 强度 

分 类 号：TU521.3[建筑科学—建筑技术科学]