【摘要】 对唐山市混凝土工程用粗骨料是否具有碱活性进行了初步的调查和研究。通过砂浆棒法、X射线衍射(XRD)、扫描电镜(SEM)等测试手段,确定了骨料的碱活性类型及程度。研究结果表明,唐山市使用的骨料有一部分是碱硅酸活性的,有一部分是碱碳酸盐活性的。建议施工部门在施工前采取一定的防范措施。更多还原

【Abstract】 The potential alkali reactivity of coarse aggregates used in Tangshan was studied.The types and the grade of alkali reactivity were investigated by means of XRD,mortar bar method and SEM analyses.The results show that some aggregates are alkali-silica reactive and some are alkali-carbonate reactive.It is suggested that the pre- ventive measures should be taken when those aggregates are used in the constructions.更多还原