作　　者： ;

机构地区： 华南理工大学

出　　处： 《硅酸盐学报》 1991年第4期289-296,共8页

摘　　要： 为了深入研究氢氧化钙在碱-集料反应中的作用,专门研究了结晶氢氧化钙在各种SiO_2/Na_2O摩尔比及不同SiO_2浓度的碱-硅溶液中受侵蚀的情况。结果发现当溶液的R_(?s)=1.6—2时侵蚀最严重;在此范围以外的溶液造成的侵蚀轻微得多。表面反应生成的产物从沉淀到凝胶及C-S-H变化很大。溶液中的SiO_2浓度的增加也有利于对氢氧化钙侵蚀的增强。探讨了氢氧化钙在不同pH值下受侵蚀的机理。 In order to determine the role of Ca(OH)_2 in the alkali-silica reaction, a systematic study of the attack to portlandite by alkali-silica solutions of a sequence of SiO_2/Na_2O mole ratios R_(ms), and variety of [SiO_2] had been approached. Results show that the attack would be the maximum when the R_(ms), of solutions fall within the limit of 1.6 to 2, and much slighter beyond the limit, and that increase of SiO_2 concentration would also increase the attack. The products of reaction varied widely relevant to their composi-tion and morphology.

关 键 词： 氢氧化钙 碱 硅 集料反应

领　　域： [化学工程]