工业废渣-水泥协同制备淤泥基流态固化土性能研究  

Performance of sludge-based fluid solidified soil prepared by industrial waste-cement synergistic process

作　　者：杨家威 YANG Jia-wei(CRCC Harbour&Channel Engineering Bureau Group General Contracting Company,Zhuhai,Guangdong 519000,China)

机构地区：[1]中国铁建港航局集团有限公司总承包分公司,广东珠海519000

出　　处：《中国港湾建设》2025年第4期71-78,共8页China Harbour Engineering

基　　金：中国铁建港航局集团有限公司科研计划项目(2024A08)。

摘　　要：开展工业废渣与废弃淤泥资源化利用,有助于实现我国工业高质量发展与生态文明建设,故研究工业废渣-水泥协同制备淤泥基流态固化土新技术具有重要现实意义。通过无侧限抗压强度、流动扩展度和扫描电镜等试验,依次明确工业废渣-水泥协同制备淤泥基流态固化土受多种因素影响的规律,揭示工业废渣-水泥协同固化淤泥宏观特性与微观增效机制。试验结果表明:D-C、CS-C与D-CS-C协同固化作用在强度提升上均弱于单一水泥固化作用,而G-C、T-C与G-T-C协同固化作用与之相反;D-C、G-C与T-C流态固化土抗压强度与初始含水率呈现负相关关系;电石渣对试样起到强度削弱作用,2%G2%T工业废渣配比对应强度最高;随着4种工业废渣掺量增大,工业废渣-水泥掺入拌合物流动性能均呈现先增大后降低的趋势,初期增大现象源于废渣竞相吸收水泥水化反应所需水分,后期降低现象源于废渣进一步消耗剩余水分;不管何种工业废渣掺入,均能提升淤泥基拌合物流动性能,添加适量脱硫石膏效果最佳;稻壳灰自身结构特性导致协同固化试样中存在较多孔隙,电石渣受限于初始含水率偏低而生成较强碱性环境,从而抑制水化反应进行;高炉矿渣发挥火山灰性能促使生成C-S(A)-H胶凝物质;脱硫石膏适量掺入生成的钙矾石彼此交错构建空间网状结构,助力土体强度提升。The resource utilization of industrial waste and waste sludge can help to realize the high-quality development of China忆s industry and the construction of ecological civilization,so it is of great practical significance to study the new technology of industrial waste-cement synergistic preparation of sludge-based fluid solidified soil.By carrying out the unconfined compressive strength,slump flow and scanning electron microscope tests,the rules of the influence of various factors on the synergistic preparation sludge-based fluid solidified soil by industrial waste and cement were clarified,and the macro characteristics and micro synergistic mechanism of industrial waste-cement co-solidified sludge were revealed.The results show that D-C,CS-C and D-CS-C synergistic solidification are weaker than single cement solidification in strength gain,while G-C,T-C and G-T-C synergistic solidification are the contrary.The compressive strength of D-C,G-C and T-C fluid solidified soil is negatively correlated with the initial water content,calcium carbide slag plays a role of debilitating the strength of specimen,and the strength of the 2%G2%T industrial waste ratio is the highest.With the increase of the content of four kinds of industrial wastes,the fluidity performance of industrial waste-cement blended mixture is showing a trend of first growth and then decrease,the initial increase comes from the waste to grab the water required for the hydration reaction of cement,and the later decrease originates from the waste to further consume the remaining water.No matter what kind of industrial waste is added,it can improve the fluidity performance of the sludge-based mixture,among which adding the right amount of desulphurisation gypsum is the best.The structural properties of rice husk ash led to the existence of more pores in synergistic solidification,and the calcium carbide slag is limited by the low initial moisture content and generates a more alkaline environment,which inhibits the hydration reaction.The blast furnace min

关 键 词：工业废渣 流态固化土 无侧限抗压强度 流动扩展度 扫描电镜 

分 类 号：U654[交通运输工程—港口、海岸及近海工程]