NB01固化剂固化建筑渣土路基填料的适宜性试验研究
Suitability of NB01 Curing Agent to Solidify Construction Waste Soil as Roadbed Filler
许大鹏 1朱剑锋 2汪正清3
作者信息
- 1. 明阳(宁波)环保科技有限公司,浙江宁波 315021
- 2. 浙江科技大学土木与建筑工程学院,浙江杭州 310023
- 3. 浙江科技大学土木与建筑工程学院,浙江杭州 310023;杭州路达公路工程有限公司,浙江杭州 310024
- 折叠
摘要
建筑渣土堆集占用了大量的土地资源,并造成一定程度的环境污染.采用新型固化剂NB01 对宁波典型建筑渣土进行固化处理,通过开展无侧限抗压强度试验、路用性能试验、X射线衍射试验和电镜扫描试验,探究NB01 固化建筑渣土路基填料的固化效果,揭示NB01 固化建筑渣土的作用机理.结果表明:固化渣土无侧限抗压强度(qu)随着养护龄期和掺量的增加而增长,采用 10%掺量NB01 型固化剂加固宁波建筑渣土,养护 28 d后qu可达到 1396 kPa,固化土的水稳系数达 0.96,CBR值达到 25.80%以上,满足路基填料性能要求.NB01 型固化剂水化反应生成C-A-H和C-S-H凝胶增强了土颗粒之间的胶结性,并且填充了孔隙,提高了固化建筑渣土的力学性能.研究成果可为建筑渣土的资源再生利用提供参考.
Abstract
The accumulation of construction waste soil has occupied a large amount of land resources and result in environ-mental pollution.A new curing agent,NB01,was adopted to solidify typical construction waste soil in Ningbo.Through conducting a series of macro-micro laboratory tests such as unconfined compressive strength test,road performance test,X-ray diffraction test,and electron microscopy scanning test,the solidification effect of NB01 solidified construction waste soil roadbed filler was investigated,and the mechanism of NB01 solidified construction waste soil was further revealed.The test results show that the unconfined compres-sion strength,qu,of solidified muck increases with the increase of curing age and content.After 28-day curing,qu of the solidified muck can reach 1396 kPa,the water stability coefficient of the solidified soil approaches to 0.96,and the CBR value is larger than 25.80%,which meets the performance requirements of subgrade filler.The hydration reaction of NB01 can produce C-A-H and C-S-H gel,which enhance the cementation between soil particles and fill the pores and further promote the mechanical properties of solidified con-struction waste soil.The study could provide guidance for the recycling and utilization of construction waste resources.
关键词
建筑渣土/无侧限抗压强度/水稳定性/加州承载比/微观机理Key words
construction waste soil/unconfined compressive strength/water stability/CBR/microscopic mechanism引用本文复制引用
基金项目
浙江省公益项目(LGG22E090002)
浙江省水利防灾减灾重点实验室开放基金(FZJZSYS21007)
出版年
2024
NETL
NSTL
万方数据