欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
针对镁渣利用率低,现代混凝土尺寸稳定性要求高的问题,考虑利用镁渣水化后的体积膨胀性补偿混凝土的收缩变形,以镁渣取代率为主要因素,运用无约束收缩变形的非接触法和接触法试验研究镁渣对混凝土早龄期（3 d）以及长期（180 d）干燥收缩的影响,揭示作用规律,探讨作用机理,为镁渣的资源化利用提供新的科学依据,混凝土尺寸稳定性的提高提供一条经济有效的措施.研究表明：混凝土的干燥收缩随镁渣取代率的增大而减小,干燥收缩的发展与水泥的水化进程基本一致;混凝土的早龄期干缩变形占总干缩变形的比重较大,减小混凝土干燥收缩变形的重点在早期;镁渣能显著减小混凝土的干燥收缩,在取代率不大于25％时,混凝土的干燥变形一直处于收缩状态,无膨胀现象.
英文摘要：
In view of the low utilization rate of magnesium slag,high size stability requirement of modern concrete problem,the volume expansion of magnesium slag is used to compensate for the shrinkage deformation of concrete.The magnesium slag replacement rate is taken as the main factor,the influence of magnesium slag at the early age （3d） and long-term （180d） drying shrinkage deformation of concrete is studied by using unconstrained non-contact method and contact method.The mechanism isexplored,new scientific basis is provided for the resource utilization of magnesium slag,an economic and effective measures for improving the dimensional stability of concrete.Research shows that the drying shrinkage of concrete decrease with magnesium slag replacement rate,the development of drying shrinkage and the hydration process of cement is consistent.The early age shrinkage deformation of concrete takes up a larger proportion of the total drying shrinkage deformation,the key to reducing drying shrinkage deformation of concrete is in the early days.Magnesium slag can significantly reduce the drying shrinkage of concrete,when the replace rate is not more than 25 ％,the drying deformation of concrete is in the state of contraction,no expansion phenomenon.
同期刊论文项目
同项目期刊论文
期刊信息
位置：