富含磷石膏道路底基层改良再生现场试验与应用  

Field Test and Application on Reusing of Mixture with Much Phosphogypsum in Road Base Course

作　　者：丁建文[1] 石名磊[1] 

机构地区：[1]东南大学,江苏南京210096

出　　处：《施工技术》2009年第4期98-100,共3页Construction Technology

基　　金：南京市交通局交通科学研究计划项目(2007-22)

摘　　要：以某道路建设为研究背景,通过界限含水率试验及X荧光定量分析,指出工业废料磷石膏直接取代二灰土中的粉煤灰,大剂量应用于道路底基层稳定土,在富水环境下引发吸水膨胀是导致工程病害的根本原因。通过现场试验,提出道路底基层既有富含磷石膏混合料的改良再生方案,并进行工程应用。结果表明:将6.5%L(石灰)+20%F(粉煤灰)+73.5%H(既有混合料)的组合配合比应用于全线道路底基层改良再生施工中,路用性能检测结果和道路使用效果均良好。Taking some road construction as backgTonnd, through limit moisture content test and X fluorescence analysis, it is pointed out that the water expansion induced by phosphogypsum, which is massively used in stable soil of road base courso by replacing fly ash, is the basic reason to induce engineering diseases. Based on the results of the field test, the reusing project is put forward and used in practical construction. And results show that both the test results of highway properties and the use effcet are well with the mix design as 6.5%L（lime） ＋ 20%F（fly ash） ＋ 73.5%H （mixture） anulied in construction.

关 键 词：道路 磷石膏 混合料 膨胀机理 底基层 现场试验 应用 

分 类 号：U414[交通运输工程—道路与铁道工程]