碱渣与粉煤灰拌合物的岩土工程及环境特性研究

Research on geotechnical properties and environmental effect of mixture of soda waste and fly ash

碱渣是氨碱法生产纯碱时产生的工业废料,仅天津碱厂历年堆积的碱渣占地已达数平方公里。碱渣与其它材料(如粉煤灰等)拌和可制成工程土,代替一般工程土作为道路基础或大面积填垫材料的途经。对碱渣制工程土的化学成分,岩土工程性质和对环境的影响进行了研究,对碱渣土回填场地的地基承载能力和长期稳定性进行了测试。研究成果可以使这种工程土得到合理利用,从而减轻工业废料—碱渣的堆积和污染问题。

Soda waste is a kind of industrial waste when the traditional soda production technology is adopted. The accumulated soda waste by the Tianjin Soda Factory only has taken places up to several square kilometers. This paper deals with a procedure to mix the soda waste with some other materials such as fly ash and concrete, to form a new type of soil for land reclamation and road foundation. The chemical contents, geotechnical properties and the environmental effect of the mixtures are studied. The bearing capacity and the field stability of the foundations made of the soda waste mixtures are tested. The research results show that the mixtures can provide enough bearing capacity for road foundation and room foundation, and is especially good for land reclamation, in which less treatment is needed, The mixtures should be used far away from water sources and farm zone, Therefore, the mixtures can be used in the coastal areas where the environmental effect of the soda waste mixtures is no worse than the local soils.