期刊论文

Effect of lime-modified phosphogypsum on properties of cement mortar

中文

武汉轻工大学学报

2095-7386

2019

38

1

51-55+72

10.3969/j.issn.2095-7386.2019.01.010

湖北省自然科学基金面上项目(2017CFB510).

本校为第一机构

采用生石灰对磷石膏进行中和预处理,研究了生石灰和磷石膏混合物的活化指数及其水泥砂浆基本力学性能随生石灰掺量的变化规律,结合红外光谱和电镜扫描进行机理分析。结果表明:磷石膏的活化指数与生石灰掺量之间关系密切,改性磷石膏活化指数的最佳磷石膏掺量为2%;生石灰加入磷石膏水泥基材料大大增加了砂浆的最大稠度用水量和水泥水化反应的凝结时间;磷石膏水泥砂浆的物理力学性能受生石灰掺量的影响较大,砂浆力学性能较好时对应的磷石膏掺量也为2%。实验证明磷石膏水泥砂浆经生石灰中和处理能制备出性能更优的水泥砂浆,提高磷石膏在建材方面的利用率。

The author used quicklime to pretreat the phosphogypsum.The activation index of the mixture of quicklime and phosphogypsum and the variation of the basic mechanical properties of cement mortar with the content of quicklime were studied by neutralizing the phosphogypsum with quicklime.The mechanism was analyzed using the infrared spectroscopy and scanning electron microscope.The results show that the activation index of phosphogypsum was closely related to the content of quicklime,and the optimum amount of phosphogypsum for the modified phosphogypsum activation index was 2%.The addition of quic...