Environment Influence on Concrete with a Polybutadiene Matrix

Corrosive Environment Influence on Concrete with a Polybutadiene Matrix 

Destruction of polybutadiene that occurs under the action of nitric acid is caused by oxidation of a polymer macromolecule. In other words, cross-section links of a spatial composite network formed by the vulcanization process are broken. The well-known oxidization ability of sulfuric acid is responsible for a decrease in double links in the rubber molecular structure, resulting in a reduction in the RubCon strength indexes. Corrosive attack by hydrochloric acid is linked to oxidation and isomerization processes and, therefore, the durability of the composite depends on the speed of these processes. 

Corrosive attack by organic carboxylic acids on polybutadiene binder is exhibited by oxidization and depolymerization processes, with the resulting the formation of carboxyl groups COOH. Carboxylic acids generally are weaker than inorganic acids because the speed of these processes is lower and, therefore, the decrease of physical-mechanical properties of RubCon occurs more slowly. The most intensive reduction of RubCon strength properties (compressive strength and modulus of elasticity) due to carboxylic acids attack were noted in the first 90 days. Penetration depths of 

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