Effects of styrene-butadiene latex modification on the failure mechanism, mechanical, physical, and durability characteristics of concrete materials were studied.
Microscopic investigations were performed on concrete cylinders pre-loaded to different compressive stress levels in order to study the process of failure in concrete under increasing stress levels as influenced by latex modification. These results were indicative of the effectiveness of latex in controlling the initiation and growth of microcracks under load.
Test results on the impact resistance and flexural strength and toughness of concrete were used to quantify and statistically confirm the positive effects of latex modification on various aspects of the mechanical properties of concrete.
Durability studies showed that latex modification imparts significant improvements to the scaling resistance and impermeability characteristics of concrete.
Latex modification was also observed to substantially reduce the water absorption capacity of concrete. The effects of latex on free drying shrinkage strains and bulk specific gravity of concrete were not statistically significant.
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