《工程科学学报》录用稿，htps:/doi.org/10.13374/i,issn2095-9389.2020.11.13.001©北京科技大学2020 堆存温度对半水磷石膏胶凝性能影响 王志凯'，王贻明区，吴爱祥1，李根，李剑秋2 1)北京科技大学，土木与资源工程学院，北京1000832)贵州大学，化学与化工学院，贵阳550025：) 通信作者，E-mail:ustbwym@126.com 摘要针对半水磷石膏(HPG)长时间堆存状态下会出现固结现象，其胶凝性能也相应下降。以室内HPG结晶水检测和单轴 压缩试验为基础，通过设定4种不同堆存温度，分别为20,40,60和80℃，探究不同堆存温度作用下HPG试样结晶水含 量变化和堆存后制备的充填胶凝材料(HCM)抗压强度发展规律，并采用SEM等微观分析手段研究摊存温度对其强度影响 机制。结果表明，堆存温度对HPG胶凝性能影响显著，高的堆存温度会加快HPG试样中的自水转变为结晶水速率，而且 会抑制堆存后制备的HCM强度发展。采用数据标准化对不同堆存温度作用后的试样抗乐强度作出预测，被证实与实测值较 吻合。微观分析发现，堆存温度主要影响体系的过饱和度，而使不同堆存温度作用后制备的CM微观形态表现差异。 关键词半水磷石膏，堆存温度，胶凝性能，标准化处理，强度预测 分类号TD853 Effect of storage temperature on cementitious property of Hemihydrate phosphogypsum WANG Zhi-kai,WANG Yi-ming,WU Ai-xiangLGen,LI Jian-qiu 1)School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China: 2) School of Chemistry Engineering,Guizhou University,Guiyang 550025,China) Corresponding author,E-mail:ustbwym@126.com ABSTACT Whether it is domestic or foreign,the utilization of phosphogypsum(PG)resources is not satisfactory.A chemical plant in Guizhou produces phosphoric acid through the semi-aqueous process to obtain the by-product hemihydrate phosphogypsum(HPG) which has certain gelling activity.If this feature of HPG can be fully utilized,it can replace cement as a cementing material to prepare mine filling materials.The use of HPG for the goaf filling can not only reduce the environmental protection problems caused by the surface discharge of PG,butalso eliminate the hidden safety hazards in the goaf.At present,when HPG is used to prepare mine filling cementitious material ipis found that when HPG is stacked for a certain period of time,it will be consolidated into a block and lose its gelling activity.For the HPG in the storage state,its gelling performance appears to decline.Based on indoor HPG crystal water detection and uniaxial compression test,by setting 4 different storage temperatures,respectively 20,40,60 and 80C explore the changes and changes in the content of crystal water of HPG samples under different storage temperatures.The compressive strength development law of HCM prepared after storage,and microscopic analysis methods such as SEM are used to study the influence mechanism of storage temperature on its strength.The results show that the stacking temperature has a significant effect on the gelling performance of HPG.A high stacking temperature will speed up the conversion of free water in the HPG sample to crystal water and inhibit the strength development of the HCM prepared after stacking.Data standardization is used to predict the compressive strength of samples after different storage temperatures,which is confirmed to be in good agreement with the measured values.The 收藕日期：2020-11-13 基金项目：国家自然科学基金资助项目(51674012)堆存温度对半水磷石膏胶凝性能影响 王志凯 1，王贻明 1，吴爱祥 1，李根 1，李剑秋 2 1) 北京科技大学，土木与资源工程学院，北京 100083 2) 贵州大学，化学与化工学院，贵阳 550025；） 通信作者, E-mail: ustbwym@126.com 摘 要 针对半水磷石膏（HPG）长时间堆存状态下会出现固结现象，其胶凝性能也相应下降。以室内 HPG 结晶水检测和单轴 压缩试验为基础，通过设定 4 种不同堆存温度，分别为 20，40，60 和 80 ℃，探究不同堆存温度作用下 HPG 试样结晶水含 量变化和堆存后制备的充填胶凝材料（HCM）抗压强度发展规律，并采用 SEM 等微观分析手段研究堆存温度对其强度影响 机制。结果表明，堆存温度对 HPG 胶凝性能影响显著，高的堆存温度会加快 HPG 试样中的自由水转变为结晶水速率，而且 会抑制堆存后制备的 HCM 强度发展。采用数据标准化对不同堆存温度作用后的试样抗压强度作出预测，被证实与实测值较 吻合。微观分析发现，堆存温度主要影响体系的过饱和度，而使不同堆存温度作用后制备的 HCM 微观形态表现差异。 关键词 半水磷石膏，堆存温度，胶凝性能，标准化处理，强度预测 分类号 TD853 Effect of storage temperature on cementitious property of Hemihydrate phosphogypsum WANG Zhi-kai1) , WANG Yi-ming1), WU Ai-xiang1) , LI Gen1) , LI Jian-qiu2) 1) School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2) School of Chemistry Engineering, Guizhou University , Guiyang 550025, China) Corresponding author, E-mail: ustbwym@126.com ABSTACT Whether it is domestic or foreign, the utilization of phosphogypsum (PG) resources is not satisfactory. A chemical plant in Guizhou produces phosphoric acid through the semi-aqueous process to obtain the by-product hemihydrate phosphogypsum (HPG), which has certain gelling activity. If this feature of HPG can be fully utilized, it can replace cement as a cementing material to prepare mine filling materials. The use of HPG for the goaf filling can not only reduce the environmental protection problems caused by the surface discharge of PG, but also eliminate the hidden safety hazards in the goaf. At present, when HPG is used to prepare mine filling cementitious material, it is found that when HPG is stacked for a certain period of time, it will be consolidated into a block and lose its gelling activity. For the HPG in the storage state, its gelling performance appears to decline. Based on indoor HPG crystal water detection and uniaxial compression test, by setting 4 different storage temperatures, respectively 20, 40, 60 and 80 , explore the ℃ changes and changes in the content of crystal water of HPG samples under different storage temperatures. The compressive strength development law of HCM prepared after storage, and microscopic analysis methods such as SEM are used to study the influence mechanism of storage temperature on its strength. The results show that the stacking temperature has a significant effect on the gelling performance of HPG. A high stacking temperature will speed up the conversion of free water in the HPG sample to crystal water and inhibit the strength development of the HCM prepared after stacking. Data standardization is used to predict the compressive strength1 of samples after different storage temperatures, which is confirmed to be in good agreement with the measured values. The 1收稿日期:2020-11-13 基金项目:国家自然科学基金资助项目(51674012) 《工程科学学报》录用稿，https://doi.org/10.13374/j.issn2095-9389.2020.11.13.001 ©北京科技大学 2020 录用稿件，非最终出版稿