CO_(2)整体快速碳化固化软弱地基技术  

CO_(2) Integral Rapid Carbonization Curing Soft Foundation Technology

作　　者：无 

机构地区：[1]东南大学

出　　处：《交通节能与环保》2024年第S1期31-34,共4页Transport Energy Conservation & Environmental Protection

摘　　要：针对公路工程建设中经常面临的各类软弱地基问题和全球日益增长的碳排放问题,该技术采用活性MgO及其相关矿渣(蛇纹石渣)为固化材料代替碳排放高的硅酸盐水泥固化剂,建立了固化剂掺量、注气压力、注气管间距、地表密封、搅拌时间等整体碳化固化设计方法,与软弱地基整体搅拌后注入与固化剂质量相当的CO_(2)气体进行快速碳化固化反应,经过3~6 h碳化反应后生产系列镁系矿物,胶结固化软弱土体,实现软弱地基土的快速加固目标,其强度能达到2~3 MPa,地基承载力超过140 k Pa,满足公路工程路基设计要求。In view of the various weak foundation problems often faced in highway engineering construction and the increasing carbon emission problem in the world,the technology adopts active MgO and its related slag(serpentine slag)as the curing material to replace the Portland cement curing agent with high carbon emission,and establishes the overall carbonization curing design method,such as the curing agent content,gas injection pressure,gas injection pipe spacing,surface sealing,and mixing time.CO_(2) gas with the same quality as the curing agent is injected into the soft foundation after the whole mixing to carry out rapid carbonization and solidification reaction.After the carbonization reaction for 3~6 hours,a series of magnesium series minerals are produced,and the weak soil is cemented and solidified to achieve the rapid reinforcement goal of the soft foundation soil.The strength can reach 2~3 MPa and the bearing capacity of the foundation exceeds 140 kPa.Meet the roadbed design requirements of highway engineering.

关 键 词：软弱基础 矿渣 固化材料 设计方法 碳排放 

分 类 号：U416.11[交通运输工程—道路与铁道工程]