黄河淤泥免烧砖的制备及其性能表征  

The Preparation and Characterization of Non Fired Brick with Yellow River Silt

作　　者：李圣军 李正昊 徐亮 华磊 葛雪祥 樊曦 樊传刚[1] 黄波 Li Shengjun;Li Zhenghao;Xu Liang;Hua Lei;Ge Xuexiang;Fan Xi;Fan Chuangang;Huang Bo(School of Materials Science and Engineering,Anhui University of Technology,Maanshan,Anhui 243002;Anhui Ronggong Boda Environmental Protection Technology And Materials Research Institute Co.,Ltd.,Maanshan,Anhui 243000;School of Water Conservancy and Environment,Jinan University,Ji’nan,Shandong 250022)

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002 [2]安徽省融工博大环保技术材料研究院有限公司,安徽马鞍山243000 [3]济南大学水利与环境学院,山东济南250022

出　　处：《非金属矿》2023年第5期76-80,共5页Non-Metallic Mines

基　　金：安徽高校协同创新项目(GXXT-2019-028)。

摘　　要：黄河淤泥塑性低,固化强度低,本试验以黄河淤泥为主要原料,矿物复合胶凝材料作为胶结材料,细砂为增强材料,制备黄河淤泥免烧砖试样(UFB),并研究细砂掺量对免烧砖试样性能的影响。结果表明,掺入细砂可提高淤泥免烧砖试样的抗压强度,降低吸水率,增大软化系数,提升抗冻融性能。在室温养护,固化剂掺量为16.67%,细砂掺量为5%,复合土中黄河淤泥和壤土的质量比为7∶3的条件下,免烧砖试样28 d抗压强度达13.78 MPa,吸水率为12.64%,软化系数为0.73,20次冻融循环后的强度损失率和质量损失率分别为5.1%和4.7%。提高养护温度在一定程度上可提高淤泥免烧砖试样的无侧限抗压强度。Due to the low plasticity and low curing strength of Yellow River silt,the unfired birck(UFB)sample of Yellow River silt were prepared by using it as the main raw material,mineral composite cementing material and fine sand as reinforcing material.The influence of fine sand content was studied.The results showed that the addition of fine sand could improve the compressive strength,softening coefficient,freeze-thaw resistance,and reduce water absorption rate of the sample.Under the conditions of curing at room temperature,the content of curing agent was 16.67%,the content of fine sand was 5%,and the mass ratio of Yellow River silt to loam in composite soil was 7∶3,the 28 d compressive strength of the sample was 13.78 MPa,its water absorption rate was 12.64%and softening coefficient was 0.73.After 20 times of freeze-thaw cycles,its strength loss rate and mass loss rate were 5.1%and 4.1%,respectively.The compressive strength of UFB samples could be improved by increasing the curing temperature.

关 键 词：黄河淤泥 细砂 抗压强度 抗冻融性能 免烧砖 

分 类 号：TU521.2[建筑科学—建筑技术科学] X703[环境科学与工程—环境工程]