无硫复合激发剂对固硫灰渣掺和料的影响研究

为解决传统含硫激发剂对环境造成的不利影响,弥补单一激发剂使用时体系存在流动度低的问题,采用CaCO_(3)与CaSiO_(3)进行复合,设计出新型无硫复合激发剂,并分析其对固硫灰渣水泥胶砂性能的影响机制。结果表明,利用碳酸盐与硅酸盐之间的协同作用,促进了固硫灰渣的水化历程,解决了激发剂单独使用时体系存在流动度比低的问题。其中,当碳酸钙掺量为1.2%,硅酸钙掺量为0.018%时,所产生激发效果优于硫酸盐类材料,使体系流动度比提高10%,同时抗压活性仍保持在较高的水平。

The Locals' Opportunity under Foreign Banks' Expansion

The global financial crisis is striking the international financial market severely.Since July 2007,foreign banks and brokers have been suffering an enormous loss caused by the financial crisis.More than 160 thousand jobs have been cut this year by financial institutions like Citibank,HSBC and Morgan Stanly,etc.However,what shows a strong contrast with