工业固废磷石膏在公路路面大修工程的应用研究  

Application of Industrial Solid Waste Phosphogypsum in Highway Pavement Overhaul Project

作　　者：张厚记 宗炜 区桦 ZHANG Houji;ZONG Wei;OU Hua(Central-Southern Safety&Environment Technology Institute Co.,Ltd.,Wuhan,Hubei 430071,China)

机构地区：[1]中南安全环境技术研究院股份有限公司,湖北武汉430051

出　　处：《公路工程》2023年第1期98-101,107,共5页Highway Engineering

基　　金：湖北省交通科技项目(2020-2-1-8);中南工程咨询设计集团科技基金项目(CSET-Y20-147)。

摘　　要：为促进工业固废磷石膏资源的可持续循环利用,介绍了一种大掺量磷石膏复合稳定碎石基层技术。研究表明,多元固化剂的添加有效激发了磷石膏复合稳定材料的胶凝活性,各项路用性能满足公路使用要求,并采用SEM电子显微镜分析了强度形成机理;磷石膏中氟、磷、砷、重金属等主要污染物被有效反应或者固化,具有良好的环境安全性。该技术已在湖北省宜都市S225省道雅澧线路面大修工程中成功应用,为后续长期路用性能观测和环境影响评价研究奠定了基础。In order to promote the sustainable recycling of industrial solid waste phosphogypsum resources in China,a high-volume phosphogypsum composite stabilized macadam base technology was introduced.The research shows that the addition of multiple curing agents effectively stimulates the cementitious activity of phosphogypsum composite stabilization materials,and the road performance meets the requirements of highway use.The strength formation mechanism is analyzed by SEM.The main pollutants such as fluorine,phosphorus,arsenic and heavy metals in phosphogypsum are effectively reacted and solidified,and have good environmental safety.This technology has been successfully applied in the overhaul project of Yali line surface of S225 provincial road in Yidu City,Hubei Province,which lays the foundation for the subsequent long-term road performance observation and environmental impact assessment.

关 键 词：道路工程 磷石膏 公路基层 路用性能 环保安全性 

分 类 号：U418.6[交通运输工程—道路与铁道工程]