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Effect of styrene-butadiene rubber LaTeX on mechanical properties of cementitious materials highlighted by means of nanoindentation
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.
Effect of styrene-butadiene rubber LaTeX on mechanical properties of cementitious materials highlighted by means of nanoindentation
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.
Effect of styrene-butadiene rubber LaTeX on mechanical properties of cementitious materials highlighted by means of nanoindentation
Wang, R. (Autor:in) / Lackner, R. (Autor:in) / Wang, P.M. (Autor:in)
Strain ; 47 ; 117-126
2011
10 Seiten, 9 Bilder, 5 Tabellen
Aufsatz (Zeitschrift)
Englisch
Properties of GRC modified by styrene-butadiene rubber latex
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