摘要
为明确工业固废胶凝材料对高速公路路床的影响,将其与水泥对路床土的固定改良作用进行对比研究.结果表明,工业固废早期水化活性低,凝结时间长,掺量为3%时,1 d抗压强度仅0.34 MPa,延迟成型24 h时强度未出现降低,允许施工时间长达24 h,远高于水泥,对路床特别是作为顶层的96-4有充足时间实现精细化施工.28 d无侧限抗压强度可达到2.36 MPa,CBR为156%,保证公路运行过程中具有优于水泥的强度性能.结合实际工程,工业固废胶凝材料用作固化剂时,路床96-4的压实度为97.4%,平整度为10.4 mm,弯沉为84.7(0.01 mm),各项指标满足设计要求,均优于水泥稳定土,为工业固废应用于道路路床施工提供了一定的借鉴意义.
In order to clarify the influence of industrial solid waste material on highway road bed,the improvement effect of industrial solid waste and cement on road bed soil were studied.The research showed that the cementitious material based on industrial solid waste had low hydration activity in early stage,and long setting time.When the content is 3%,the 1 d unconfined compressive strength of industrial solid waste stabilized soil was only 0.34 MPa;the strength was not decreased when the molding delayed for 24 h.The allowable construction time as soil curing agent can be up to 24 h,and much higher than cement stabilized soil.There was enough time for the road bed,especially 96-4 as the top floor of the road bed,to achieve fine construction.Its 28 d compressive strength can reach 2.36 MPa,and CBR was 156%,ensuring that the industrial solid waste material had better strength than cement in the highway process of operation.Combined with the actual project,when industrial solid waste material was used as soil curing agent,the compactness of road bed 96-4 was 97.4%,flatness was 10.4 mm,and bending was 84.7(0.01 mm).All design requirements were met and higher than that of cement stabilized soil.It provides some reference for the application of industrial solid waste on road bed construction.
作者
褚付克
马春锋
李豪
CHU Fuke;MA Chunfeng;LI Hao(Henan Transportation Planning and Design Institute Co.Ltd.,Zhengzhou 450000,China;Henan Puwei Expressway Co.Ltd.,Puyang 457000,Henan China)
出处
《河南科学》
2023年第8期1196-1204,共9页
Henan Science
基金
河南省交通运输厅科技项目(2021J9)。
关键词
固废胶凝材料
允许施工时间
稳定土
无侧限抗压强度
延迟成型
industrial solid waste cementitious material
allowable construction time
stabilized soil
unconfined compressive strength
delay forming
