Influences of a New Admixture MX on Concrete Durability

来源 :武汉理工大学学报(材料科学版)英 | 被引量 : 0次 | 上传用户:infoerp2009
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The performance of concrete with a new admixture MX was studied by using the freeze-thaw cycle, permeability and chemical attack test. The experimental results show that MX improves the durability of concrete. Within the optimum proportion ranges from 0.1%to 1%,the compressive strength of concrete after freeze-thaw is increased by 20%-50%,and Young’s modulus can be increased by 3.76-5.64 times.The strength and weight loss of concrete with 0.4%MX are respectively decreased by 28% and 60% after hydrochloric acid attack.The strength and weight loss of concrete with 0.4% MX are decreased by 5%-20% after sulfuric acid and sodium sulfate attack.The permeability of concrete with 1% MX at 28 days can be decreased by more than 30%. The investigation of the negative temperature property of MX and analysis on concrete composition and microstructure by MIP reveal that the heat conduction is resisted and the freezing procedure of solution in concrete pore is retarded due to the adding of MX. Moreover,the pore structure of concrete with MX is improved, thus improving the durability. Based on this study, a resistance model of MX to block the heat and mass transference was proposed, and the mechanism of durability improvement of concrete with MX was explained.
其他文献
期刊
目的 观察IQ结构域三磷酸鸟苷(GTP)酶激活蛋白1(IQGAP1)在甲状腺癌细胞增殖和侵袭中的作用.方法 通过Western blot对IQGAP1在甲状腺癌细胞中的表达进行分析,然后敲低IQGAP1表
目的对比观察正常培养、NMDA损伤及MK-801保护皮层神经元膜表面三维构象形貌改变.方法分别应用光镜、扫描电镜和分辨率为0.1~0.01 nm的原子力显微镜(atomic force microscope,AFM)对戊二醛固定的正常原代培养大鼠皮层神经细胞膜,NMDA损伤及MK-801保护后神经元膜表面进行纳米尺度的扫描观测,结果进行比较.结果正常神经元膜表面光滑,起伏均匀,隆起的颗粒状蛋白密集
随着我国新课改的不断推行,也就需要对现有的汉语文教学工作进行必要的改革,并在充分了解学生特点以及教材的基础上,来对教学思路以及教学策略进行构建,这样才能够构建社会主
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
期刊