寒旱-盐渍土环境下风积沙混凝土的制备及性能研究  

Preparation and performance study of aeolian sand concrete in cold-arid and saline environment

作　　者：吴俊臣[1] 褚菁晶[1] 何青虎 牛恒茂[1] WU Junchen;CHU Jingjing;HE Qinghu;NIU Hengmao(College of Civil Engineering and Architecture,Inner Mongolia Technical College of Construction profession,Hohhot 010070,China;Inner Mongolia Yunnong Industrial Co.,Ltd.,Hohhot 010100,China)

机构地区：[1]内蒙古建筑职业技术学院,内蒙古呼和浩特010070 [2]内蒙古云农实业有限公司,内蒙古呼和浩特010100

出　　处：《混凝土与水泥制品》2023年第10期27-31,36,共6页China Concrete and Cement Products

基　　金：内蒙古自治区高等学校科学研究项目(NJZY21366);2022年内蒙古自治区直属高校基本科研业务费项目(支持科技领军人才和创新团队建设)。

摘　　要：针对沙漠腹地与近沙漠区农业工程、基础设施建设原材料短缺、服役环境差、混凝土耐久性能差等问题,采用西部寒旱-盐渍地区的风积沙为原材料制备了C25风积沙混凝土(ASC),得到了最优配合比,并基于微观分析研究了盐冻、干湿循环耦合作用下ASC的耐久性能。结果表明:随着风积沙掺量从0增加到100%,ASC的损伤速度越慢,其抗盐冻、干湿循环耦合作用的能力也越好;高掺量(≥60%)ASC试件抗盐冻、干湿循环耦合作用的性能良好;高掺量ASC在寒旱-盐渍土地区道路与水利工程中具有较好的适用性。Aiming at the shortage of raw materials for agricultural engineering and infrastructure construction in the desert hinterland and near-desert area,poor service environment and concrete durability and other problems,the sands from the cold-arid and saline areas in the west as the raw materials for the preparation of C25 aeolian sand concrete(ASC)was used,and the optimal mix proportion was obtained.The durability of ASC under the coupling effect of salt freezing and dry wet cycles was studied based on the microscopic analysis.The results show that as the content of aeolian sand increases from 0 to 100%,the damage rate of ASC slows down,and its ability to resist the coupling effects of salt freezing and dry wet cycles also improves.ASC specimens with high content(≥60%)have good performance to resist the coupling effects of salt freezing and dry wet cycles.ASC with high content has good applicability in road and hydraulic engineering in cold-arid and saline areas.

关 键 词：风积沙混凝土 寒旱-盐渍地区 配合比设计 耐久性能 微观结构 

分 类 号：TU528.01[建筑科学—建筑技术科学]