泥石流堆积体作为再生混凝土可行性研究  

FEASIBILITY STUDY ON USING DEBRIS FLOW ACCUMULATION AS RECYCLED CONCRETE

作　　者：蒋玉[1,2] 丁勇 陈福兴 JIANG Yu;DING Yong;CHEN Fu-xing(College of Architecture and Engineering,Kunming University of Science and Technology,650500,Kunming,Yunnan,China;School of Engineering and Technology,Baoshan University,678000,Baoshan,Yunnan,China;School of CivilEngineering,Southwest Forestry University,650051,Kunming,Yunnan,China)

机构地区：[1]昆明理工大学建筑工程学院,昆明50500 [2]保山学院工程技术学院,云南保山678000 [3]西南林业大学土木工程学院,昆明650051

出　　处：《建筑技术》2025年第7期871-875,共5页Architecture Technology

基　　金：云南省地方本科高校基础研究联合专项资金项目(202301BA070001–053);保山市科技计划项目(2022zc14);云南省基础研究计划项目(202501AT070081)。

摘　　要：为探讨泥石流堆积体作为再生混凝土的可行性,参照普通混凝土配合比设计方法将泥石流堆积体进行再生混凝土配置,对普通混凝土与蒋家沟泥石流堆积体再生混凝土进行试验,从配合比、含水率、密度出发,结合坍落度、抗压强度等混凝土指标,进行泥石流堆积体转化为再生混凝土的可行性。研究结果表明:(1)在同等配合比下,泥石流作为再生混凝土的强度远不如混凝土,流动性也小于混凝土;(2)相同级配条件下,混凝土平均抗压强度远大于天然泥石流再生混凝土平均抗压强度,后者仅是前者的1/60,而将泥石流中粒径小于0.16 mm部分由水泥替代后,泥石流平均抗压强度为8.60 MPa,提高了近19倍,水泥的固化作用使替代后的泥石流再生混凝土的抗压强度提高;(3)细颗粒部分被水泥替代以后,就强度而言,泥石流堆积体用作基础垫层、地坪以及受力不大构件的混凝土材料,具有一定的可行性。To explore the feasibility of using debris flow deposits as recycled concrete,the debris flow deposits were configured with recycled concrete according to the design method of ordinary concrete mix proportion.Experiments were conducted on ordinary concrete and recycled concrete from Jiangjiagou debris flow deposits.Starting from mix proportion,moisture content,density,and concrete indicators such as slump and compressive strength,the feasibility of converting debris flow deposits into recycled concrete was determined.The research results indicate that:(1)under the same mix proportion,the strength of debris flow as recycled concrete is far inferior to that of concrete,and its flowability is also lower than that of concrete;(2)Under the same grading conditions,the average compressive strength of concrete is much higher than that of natural debris flow recycled concrete,which is only 1/60 of the former.However,after replacing the particle size less than 0.16 mm in the debris flow with cement,the average compressive strength of the debris flow is 8.60 MPa,which is nearly 19 times higher.The solidification effect of cement increases the compressive strength of the replaced debris flow recycled concrete;(3)After the fine particles are replaced by cement,in terms of strength,it is feasible to use debris flow deposits as concrete materials for foundation cushions,floors,and components with low stress.

关 键 词：泥石流堆积体 再生混凝土 坍落度 抗压强度 

分 类 号：TU74[建筑科学—建筑技术科学]