粒化高炉矿渣微粉在软土固化中的应用及其加固机理

Utilization of GGBS in stabilization of soft soils and its mechanism

软土固化是国内外广泛应用的软土地基处理技术之一,而波特兰水泥是最常用的软土固化剂。但是,波特兰水泥的生产过程存在显著的环境问题,主要表现为高能耗、高CO2排放和不可再生资源消耗。为了减轻该影响,可以采用工业副产品/废料作为主要原料,来替代(全部或部分)水泥作为软土固化剂。介绍了工业副产品/废料——粒化高炉矿渣微粉的生产来源、主要成分,以及在软土固化中的应用现状和加固机理。采用粒化高炉矿渣微粉作为软土固化剂不仅可以减小水泥生产过程带来的环境影响,同时还能提高软土固化效果,降低工程造价。

Cement stabilization is one of the most widely used soft ground improvement methods, with Portland cement being the most commonly employed binder. However, there are significant environmental impacts associated with the production of PC in terms of high energy and no-renewable resources consumption as well as CO2 emissions. In order to mitigate this effect, the incorporation of industrial by-products in partial or full cement replacement as soft soil stabilization has been encouraged. The production process, chemical properties, application and soft soil stabilization mechanism of an industry by-product/waste-ground granulated blastfurnace slag(GGBS) are introduced. The utilization of GGBS in stahilization of soft soils stabilization can reduce the significant environmental impacts associated with Portland cement production and increase the soft soil stabilizing efficiency and reduce the engineering cost.