水泥掺量对磷石膏免烧砖性能的影响  

Effect of Cement Content on the Properties of Phosphogypsum Unfired Brick

作　　者：王松 王家伟[1,2] 赵平源 杨攀[1,2] 王海峰 Wang Song;Wang Jiawei;Zhao Pingyuan;Yang Pan;Wang Haifeng(College of Materials and Metallurgy,Guizhou University,Guiyang,Guizhou 550025;Guizhou Provincial Key Laboratory of Metallurgical Engineering and Energy Saving,Guiyang,Guizhou 550025)

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]贵州省冶金工程与过程节能重点实验室,贵州贵阳550025

出　　处：《非金属矿》2021年第6期19-22,共4页Non-Metallic Mines

基　　金：国家自然科学基金(51764006,51864012);贵州省科学合作计划项目([2016]5302,[2017]5788,[2018]5781,[2019]1411,[2019]2841)。

摘　　要：为大量利用磷石膏,将激发后的磷石膏与水泥混合,制备高强度磷石膏免烧砖。通过控制水泥掺入量,探究掺入不同质量水泥对免烧砖性能的影响。结果表明,在100 g激发磷石膏中添加25 g硅酸盐水泥,养护28 d,免烧砖抗压、抗折强度分别为42.11 MPa和5.01 MPa,吸水率和饱和系数分别为21.24%和1.12,软化抗压强度为36.62 MPa,软化系数为0.87,强度等级符合GB/T 5101-2017中MU30要求。冻融循环25次后,抗压强度未损失,为45.74 MPa,质量损失率仅为1.41%,抗冻指标符合DB13/T 1328-2010标准。In this paper,high strength phosphogypsum unfired brick was prepared by mixing the excited phosphogypsum with cement.By controlling the amount of cement,the effect of cement content on the performance of fired brick was explored.The results show that when 25 g cement is added to 100 g activated phosphogypsum,cured for 28 d,the compressive strength and flexural strength of the brick are 42.11 MPa and 5.01 MPa,respectively,the water absorption rate and saturation coefficient are 21.24%and 1.12,respectively,and the softening compressive strength is 36.62 MPa,softening coefficient is 0.87,the strength grade meets MU30 of GB/T 5101-2017.After 25 freeze-thaw cycles,the compressive strength don't lose,which is 45.74 MPa,and the mass loss rate is only 1.41%,the anti-freeing indexes meet DB13/T 1328-2010.

关 键 词：磷石膏 硅酸盐水泥 免烧砖 性能 

分 类 号：X781.5[环境科学与工程—环境工程]