三峡主体工程混凝土预防碱集料反应的综合技术措施

The comprehensive technical measure on defense AAR of the concrete of the main Three Gorges project

三峡主体工程混凝土采用非活性集料 ,高掺优质粉煤灰 ,制定了严于国家标准的混凝土碱含量最高限值标准 ,通过复掺高效减水剂和引气剂等技术 ,降低了混凝土单位用水量、减少了水泥用量。同时 ,严格限制混凝土原材料碱含量 ,降低了混凝土总碱量 ,起到了综合预防碱集料反应 (AAR)的作用。

The concrete of the main three Gorges Project adopt inactive alkali aggregate and add high fly ash.The most limiting standard is strictly made,Which overwhelmed the state standard.By comprehensively adjust high Water reducing agent and gas increase agent,These technical reduce the unit Water proportion and the use of the cement.At the same time.They strictly constrain the content of the alkali of the concrete raw material and the whole content of the alkali of the concrete, The AAR is comprehensive defensed.