【摘 要】
:
The influence of high equivalent alkali content and different alkaline metal ion (K+ and Na+) on cracking of cement-based material was investigated;the resu
【机 构】
:
State Key Laboratory of Water Resources & Hydropower Engineering Science, Wuhan University, Wuhan,Ch
【出 处】
:
The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
The influence of high equivalent alkali content and different alkaline metal ion (K+ and Na+) on cracking of cement-based material was investigated;the results showed that high equivalent alkali content could improve cracking sensitivity of cement-based material seriously due to its high dry shrinkage and autogenous shrinkage,in which K+ was more likely to promote shrinkage cracking.With the help of Atomic Force Microscope (AFM),the topography of C-S-H clusters, particulate interaction of C-S-H cluster of cement-based material hydration phase were characterized.K+ and Na+ were trend to limit C-S-H cluster pack each other.Based on the micromechanics parameters and molecular structure of C-S-H cluster, the important reason for improving cracking sensitivity of cement-based material was low adhesive force of C-S-H clusters caused by different alkaline metal ions.
其他文献
以心理学、管理学、体育统计学等为理论依据,通过文献资料法、专家访谈法、问卷调查法、数理统计法等研究方法,选取南京市10所高校18支高水平运动队作为研究的调查对象,对高
事实上在决定延请设计师为其捉刀之前,男女主人对于自己未来新家的面貌,早已酝酿多时,平日即大量地阅读国内外的居家杂志,直到新家的构想雏型出现后,便和设计师沟通,清楚地
一、谈话激趣,揭示学法rn师:今天老师要给大家引荐一位古代小友,这是一个智商和情商都很高的孩子.看老师写课题.rn(板书:杨氏之子.生齐读课题)rn师:谁能说说课题的意思?rn生:
对于景物的写实而言,摄影比之绘画有着得天独厚的优越,调好了焦距光圈,咔嚓一声,所要摄取的一切全给其实地记录在胶片上,摄影的写实性借助于现代科学技术,就技术本身而言,还不能被称
In this study we report on the durability of newly developed cement-reduced eco-friendly concretes with high limestone powder content and low water-powder r
阿鹏的创作,象一泓清泉,汩汩滔滔,铿铿锵锵,悬之辉煌,呼之有声,长流过处,永无重复。他从不作态取悦他人,只是活水过处留下清音,留下印象。清音叫人心旷神怡,印象变幻万千,令
尊重学生主体地位,引导学生学会自主管理,与学生平等对话,基于学生终身成长的需要培育其独立生活能力等理念已成为教育界的共识.然而,在学校生活中,教师的绝对权威主义现象依
文言文是中华优秀传统文化的瑰宝,凝聚了宝贵的人文精髓.学习文言文,可以增强学生的文化底蕴,丰厚其文化素养,提升其审美情趣,对传承中华文脉,具有重要的意义.rn统编教材将文
It is widely known that the production of Portland cement consumes considerable energy and at the same time contributes a large volume of CO2 to the atmosph
我自幼喜欢读书,也因此和村里的其他孩子不一样.因为,我知道了过往千年的历史进程,知道了外面还有一个更广阔的世界.带着从书里汲取的知识,我以两次满分作文分别考上了初中、