摘要
通过在20℃,5%硫酸钠溶液养护制度下,研究了不同钢渣、高钙灰掺量,以及二者复掺下水泥基材料试件60、90 d的强度和90 d内试件线长度变化,并采用XRD微观分析和化学分析,揭示体积变化机理。试验结果表明,与基准样相比,适量钢渣的掺入使试件90 d收缩率最大可减少3.06×10-4;高钙灰的掺入,对体积稳定性有改善作用,其90 d最小收缩率达到1×10-4;二者的复掺,复掺叠加效应明显,而改性磷石膏的掺入,对强度、体积稳定性的改善更为突出,在一定龄期内,甚至出现了零收缩率。
The strength and the volumetric deformation of cement mortar specimen with different high calcium ash and steel slag dosages in 90 days which were cured in the condition of 20℃and 5% Na2SO4 solution were studied, and XRD were used to analyze the mechanism of volumetric deformation.Several conclusions were explored from the experiments：in contract to the control sample, the shrinkage of specimen could reduce 3.06×10^-4with suitable dosages of and steel slag; volumetric deformation benefited form using of high calcium; Steel slag and high calcium ash has the function of ameliorating the strength and the volumetric deformation;the effects were more obvious when calcined phosphogypsum was adulterated into the mineral compound cement, even the shrinkage of specimen was zero in certain terms.
出处
《混凝土》
CAS
CSCD
北大核心
2007年第11期14-16,19,共4页
Concrete
关键词
钢渣
高钙灰
改性磷石膏
体积稳定性
叠加效应
steel slag
high calcium ash
calcined phosphogypsum
volumetric stability
combined effects
