您現在的位置:建筑結構>> 期 刊>> 2019年>> 第04期>>正文內容
以河砂為摻料的改性生土材料抗壓試驗研究*
張坤1,王毅紅2,楊戰社1,劉亮2,楊世豪2
摘 要

(1 西安石油大學基建處博士后創新基地, 西安 710063; 2 長安大學建筑工程學院, 西安 710061)

[摘要]以濃度為3%的糯米漿作為生土材料的粘結劑,以不同粒徑和摻量的河砂作為改性添加材料,通過對改性生土試件進行軸向抗壓試驗,得到改性生土試件的荷載-位移曲線,分析和討論改性生土試件的軸向抗壓強度。試驗表明:以糯米漿作為改性生土材料的粘結劑可有效提高其抗壓強度和延性比;以河砂作為改性添加材料,其粒徑級配與摻量對改性生土試件的抗壓強度和延性比有一定程度影響,摻入15%細砂+15%中砂對試件抗壓強度提高效果較其他組明顯,該組試件抗壓強度為素土試件的1-25倍;延性比較素土試件提高了7%。糯米漿和河砂作為改性生土材料,綠色環保,不會影響生土材料固有的生態特性,并可以改善生土材料的力學性能,是一種可以推廣的改性生土配方。

[關鍵詞]改性生土材料; 抗壓強度; 糯米漿; 河砂; 綠色環保建材

中圖分類號:TU361文獻標識碼:A文章編號:1002-848X(2019)04-0086-05

 

Experimental analysis on compressive test of raw soil material modified by river sand

Zhang Kun1, Wang Yihong2, Yang Zhanshe1, Liu Liang2, Yang Shihao2

(1 Infrastructure Department/Postdoctoral Innovation Base, Xi′an Shiyou University, Xi′an 710063, China;2 School of Civil Engineering, Chang′an University, Xi′an 710061, China)

Abstract:The glutinous rice pulp with the concentration of 3% was used as a binder and river sand with different particle sizes mixing amounts were added to produce modified raw soil materials. Through the axial compression test of modified raw soil specimens, load-displacement curves were obtained. The axial compressive strength   were analyzed and discussed. The test indicates that glutinous rice pulp as binder of modified raw soil materials can improve its compressive strength and ductility ratio effectively. Taking river sand as modified raw soil material, the particle size gradation and mixing amount of river sand  can have a certain influence on compressive strength and ductility ratio of modified raw soil specimens. The compressive strength of the test specimens of the group with 15% fine sand and 15% medium sand increases significantly compared with other groups, showing 1-25 times of compressive strength of the pure soil specimens. The ductility ratio is improved by 7% compared with the pure soil specimens. Glutinous rice pulp and river sand as raw soil modified materials  is green and environmental, and they do not affect the inherent ecological characteristics of the raw soil materials, which can also improve the mechanical properties of raw soil materials. It can be used as  generalized raw soil modified proportioning.

Keywords:modified raw soil material; compressive strength; glutinous rice pulp; river sand; green and environmental building material

 

*國家自然科學基金(51478043),國家級大學生創新創業訓練計劃項目(201510710066)。

 

作者簡介:張坤,博士,工程師,Email:[email protected]

下載地址
福建31选7大星走势图