摘要
本文借助水泥强度和净浆膨胀测定方法与XRD对高镁水泥熟料-矿渣-石膏系统的双膨胀低热矿渣硅酸盐水泥进行了研究。得到(1)低热矿渣水泥净浆膨胀随SO3含量和时间的变化规律;(2)低热矿渣水泥强度随SO3含量的变化规律;(3)在水泥中适量SO3和熟料中MgO含量小于5%时,钙矾石膨胀和水镁石膨胀具有连续性、整体性和稳定性;(4)矿渣的掺入有助于钙矾石的形成及其数量的增加和水泥膨胀率的增加与稳定。
The expansive mechanism of low heat Portlantd slag cement with slight expansion(LHCSE)in the system of high MgO clinker\|slag\|gypsum was studied by XRD\,SEM/EDAX and test methods for strength and expansion of cement.Results indicated that the variable law of this cement expansion with contents of SO\-3,MgO and time was determined,and the variable law of this cement strength with the content of SO\-3 was obtained.Under the condition of suitable SO\-3 in cement and MgO=4\^0\_5\^0% in clinker,ettringite expansion and brucite expansion in LHCSE paste had continuity,entirety and stabilization;at 90d age expansion of paste has been 700×10\+\{-6\}.The results suggest that using this cement in mass concrete may compensate its temperature and autogenous shrinkage.\;
出处
《材料科学与工程》
CAS
CSCD
2000年第1期53-57,共5页
Materials Science and Engineering
基金
国家自然科学基金
中国长江三峡工程开发总公司资助 !5 9493 6 0 4
