摘要
河道疏浚产生的大量废弃疏浚淤泥须有效处置,而传统水泥固化剂为高能耗、高碳排放材料,与当今生态理念不符。以矿粉为主要原料、硅酸钠为碱激发剂制备新型低碳地聚合物胶凝材料固化淤泥作为工程填料,进行地聚合物固化土力学性能、压缩特性等性能检测及分析。结果表明:与10%水泥掺量的固化土相比,10%矿粉掺量的地聚合物固化土28 d无侧限抗压强度提高406.1%,破坏形式由塑性破坏转变为弹性破坏,应力-应变曲线有明显的应力峰,能更好地满足作为普通填方土材料的需要,具有良好的生态效益和广阔的应用前景,可为疏浚废弃物的资源化利用提供有效途径。
A large amount of abandoned dredged silt generated by river dredging needs to be effectively disposed of,while the traditional cement curing agent is a material with high energy consumption and high carbon emission,which is not consistent with the current ecological concept.With mineral powder as the main raw material and sodium silicate as alkali activator to prepare a new type of low carbon geopolymer cementing material solidified silt as engineering filler,we carry out an experiment and analysis of the mechanical property and compressive property of geopolymer solidified soil.The results show that compared with the solidified soil with 10%cement content,the unconfined compressive strength of geopolymer solidified soil with 10%mineral powder content increases by 406.1%for 28 d,and the failure form of solidified soil changes from plastic failure to elastic failure.The stress-strain curve shows obvious stress peak,which could better meet the needs of common filling materials.It has good ecological benefit and broad application prospect.Thus it can provide an effective way for recycling dredged wastes.
作者
王锌鑫
江朝华
孙逸琳
冯明
蔡伟泰
WANG Xin-xin;JIANG Chao-hua;SUN Yi-lin;FENG Ming;CAI Wei-tai(College of Harbor,Coastal and offshore Engineering,Hohai University,Nanjing 210098,China)
出处
《水运工程》
北大核心
2022年第8期40-44,57,共6页
Port & Waterway Engineering
基金
国家重点研发计划项目(2021YFB2600200)。
关键词
地聚合物
无侧限抗压强度
固化土
geopolymer
unconfined compressive strength
stabilized soil
