工业废渣加固土强度特性

工业废渣的资源化是解决工业废渣环境污染的有效途径之一。以粉煤灰和高炉矿渣为固化剂，石灰为碱性激发剂，对黏土进行加固。通过室内试验的方法，分析固化剂掺入量、养护龄期等对固化土无侧限抗压强度、pH值和饱和度等发展规律的影响。试验结果表明，固化土的无侧限抗压强度随固化剂掺入量的增加而增大，随养护龄期的增加而增大，提出一个综合反映固化剂掺入量、养护龄期和压实度等因素对固化土强度影响规律的综合影响因子，固化土强度与综合影响因子呈负指数函数关系；粉煤灰+石灰和高炉矿渣+石灰可有效改良土体无侧限抗压强度特性；石灰是一种有效的碱性激发剂，可提供工业废渣发生火山灰反应的高碱性环境。试验成果为工业废渣改良不良土质的设计提供试验依据。

Strength characteristics of stabilized soils using industrial by-product binders

Industrial by-product resource is an effective way to solve the environmental pollution of industrial by-product. Clay is stabilized by fly ash mixed with lime or blast furnace slag mixed with lime, respectively. The effects of binder content, curing period on the unconfined compressive strength, pH value, and degree of saturation of treated soils are investigated by a series of laboratory tests. Test results show that the unconfined compressive strength of stabilized soils increases with the increasing of binder content and curing time. A unique negative exponential function well adapts unconfined compressive strength of stabilized soils with a synthetical parameter, which represent the effect of binder content, curing period and degree of compaction. Fly ash mixed with lime or blast furnace slag mixed with lime can effectively enhance soil unconfined compressive strength properties. Lime is an effective alkaline activating agent, and the highly alkaline environment resulted from the lime can provide pozzolanic reaction conditions for industrial by-product. These results can provide a test basis for the design of stabilized soils by industrial by-product binders.