Abstract
The present study deals with tests on the energy absorption capacity and compressive strength of styrene–butadiene rubber (SBR) latex-modified cementitious materials. Different polymer–cement ratios (P/C) of 0, 5, 10, 15, and 20% were carried out with the Charpy impact test at 7, 14, and 28 days of curing. The observations showed an increase in the energy absorption capacity of the SBR latex-modified cement paste in correspondence with the increase in curing times, as well as the increase in the P/C ratios. The P/C ratio of 10% was the optimal ratio for observing the highest energy absorption capacity of the SBR latex-modified cement paste, with a 43% increase observed. In addition, a linear relationship between compressive strength and the energy absorption capacity at 28 days was proposed. Based on that, the energy absorption capacity of SBR latex-modified cement paste can be analyzed or predicted by the compressive strength results, regardless of the P/C ratios. Finally, the two-parameter Weibull distribution was proved to fit by the observation data from the Charpy impact test.
Highlights
Cement has long been viewed as a widely used material in the construction industry that plays a role as an essential binder in the composition of concrete [1,2]
Strengthstrength results of the 28-day OPC modified by styrene–butadiene rubber (SBR) latex with
The compressiveare strength results of the modified by SBR latex with different polymer– cement ratios (P/C) ratios are given in Figures 3 and 4, and Table 3
Summary
Cement has long been viewed as a widely used material in the construction industry that plays a role as an essential binder in the composition of concrete [1,2]. The literature review shows the energy absorption capacity of cement-based materials as measured by the Charpy pendulum impact test [15]. They found the dominating role that long steel fiber has in improving the Charpy impact resistance of that material From another perspective, improving the performance of cement-based materials by a polymer admixture has been conducted since the 1920s [19,20]. The formation of polymer films showed a positive effect on bridging the microcracks in the matrix under the stressed conditions, leading to a restriction in the propagation of cracks Overall, these reactions improve the performance of cement-based materials. It is worth mentioning that the polymers themselves exhibited a high impact resistance, latex-modified cement-based materials were recognized with a good energy absorption capacity compared to the conventional ones [21]. The statistical approach was utilized to clarify the observations from the experimental test and the effect of SBR latex on the energy absorption capacity of cement paste
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