掺新型氧化钙-硫铝酸钙膨胀熟料的水泥净浆变形性能.pdfVIP

学兔兔 新鲤 蟓 撕 中国科技核心期刊 撞新型氧化钙一硫铝酸钙膨胀熟料帕 水泥净浆变形时生雒 ， 陆安群“ ，张守治 ，唐思磊 (1．江苏省建筑科学研究院有限公司 高性能土木工程材料国家重点实验室，江苏 南京 210008 2．江苏苏博特新材料股份有限公司，江苏南京 210008) 摘要：研究了掺加新型氧化钙一硫铝酸钙膨胀熟料水泥净浆试件的膨胀变形、自收缩和干燥收缩特性，以及水胶比及养护温度 对膨胀熟料补偿效果的影响 结果表明，内掺4％膨胀熟料的净浆试件饱水养护膨胀主要发生在14 d内，14 d后膨胀趋于平缓；养 护温度升高，早期膨胀增大。膨胀熟料对自收缩的补偿效率受水胶比影响较大，水胶比越大，膨胀熟料对自收缩的补偿效率越高。膨 胀熟料掺量增加，对水泥净浆的早期干燥收缩具有较好的抑制作用。 关键词：氧化钙一硫铝酸钙膨胀熟料；膨胀；自收缩；干燥收缩；水胶比；养护温度 ’ 中图分类号：TU528．042．4 文献标识码：A 文章编号：1001—702X(20l4)06—0029—04 Deformation properties of cement pastes doped with new type lime and calcium sulphoaluminate expansive agent U Anqun ，ZHANG Shouzhi。 ，TANG Silei。’ (1．State Key Laboratory of Hish Performance CM1 Engineering Materials，Jiangsu Research Institute of Building Science， Nanjing 210008，Jiangsu，China：2．Jiangsu Sobute New Materials Co．Ltd．，Nanjing 210008，Jiangsu，China) Abstract：The deformation of cement pastes with and without new type calcium oxide and calcium sulphoaluminate expansive agent was measured，and the compensating effects of expansive agent on the expansion，autogenous shrinkage and drying shrinkage of cement pastes and its compensating efficiency affected b，water-binder ratio and curing temperature were investigated．The re— sults showed that expansive deformation of cement pastes with 4％ expansive agent，which were curing in water，was rapidly devel- oped within 14 days．And then the expansion could tend to be flat．The higher curing temperature was，the greater the early ex-