材料科学
复合材料
纳米压痕
丁苯橡胶
波特兰岩
抗弯强度
胶凝的
天然橡胶
抗压强度
水泥
水合硅酸钙
弹性模量
灰浆
硅酸盐水泥
压痕硬度
缩进
微观结构
苯乙烯
聚合物
共聚物
作者
R. Wang,Roman Lackner,P.-M. Wang
出处
期刊:Strain
[Wiley]
日期:2011-03-11
卷期号:47 (2): 117-126
被引量:31
标识
DOI:10.1111/j.1475-1305.2008.00549.x
摘要
Abstract: In this paper, micro-mechanical properties of styrene–butadiene rubber (SBR) latex-modified cement pastes identified by means of the nanoindentation (NI) technique are related to macro-mechanical properties of SBR latex-modified mortars obtained from standard test methods, considering an SBR latex/cement ratio varying from 0% to 20%. For this purpose, the average value of the hardness and the so-called indentation modulus of the different material phases of the cement paste, i.e. calcium–silicate–hydrate (CSH), portlandite, anhydrous cement, etc., obtained from NI are compared with the compressive and flexural strengths, on the one hand, and the dynamic elastic modulus of SBR latex-modified mortars, on the other hand. This comparison revealed a linear correlation between the dynamic elastic modulus and the indentation modulus and between the compressive strength, flexural strength and hardness. Thus, the obtained results clearly indicate the finer-scale origin of the macroscopic elastic and strength properties, linking the mechanical properties at the so-called mortar scale to the cement-paste scale.
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