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(1 西安石油大學(xué)基建處博士后創(chuàng)新基地， 西安 710063； 2 長(zhǎng)安大學(xué)建筑工程學(xué)院， 西安 710061)

［摘要］以濃度為3%的糯米漿作為生土材料的粘結(jié)劑，以不同粒徑和摻量的河砂作為改性添加材料，通過(guò)對(duì)改性生土試件進(jìn)行軸向抗壓試驗(yàn)，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(qiáng)度。試驗(yàn)表明：以糯米漿作為改性生土材料的粘結(jié)劑可有效提高其抗壓強(qiáng)度和延性比；以河砂作為改性添加材料，其粒徑級(jí)配與摻量對(duì)改性生土試件的抗壓強(qiáng)度和延性比有一定程度影響，摻入15%細(xì)砂+15%中砂對(duì)試件抗壓強(qiáng)度提高效果較其他組明顯，該組試件抗壓強(qiáng)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(huán)保，不會(huì)影響生土材料固有的生態(tài)特性，并可以改善生土材料的力學(xué)性能，是一種可以推廣的改性生土配方。

［關(guān)鍵詞］改性生土材料； 抗壓強(qiáng)度； 糯米漿； 河砂； 綠色環(huán)保建材

中圖分類(lèi)號(hào)：TU361文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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(guó)家自然科學(xué)基金（51478043），國(guó)家級(jí)大學(xué)生創(chuàng)新創(chuàng)業(yè)訓(xùn)練計(jì)劃項(xiàng)目（201510710066）。

作者簡(jiǎn)介：張坤，博士，工程師，Email：491543584@qq.com。