سيدمحمد جذبي

One of the important aspects of concrete durability is its resistance to the attack of sulfate ions. The reaction of sulfate ions with hydrated cement paste causes the cement paste to disappear and expansion products such as ettringite and gypsum to form in the concrete mix. One of the most well-known and common standard tests for eva‎luating this reaction is the ASTM C1012 standard. In this standard, the length change of samples will be measured over the course of 12 to 24 months. In this study, in order to reduce the time required for this experiment, samples were made with smaller than original mold dimensions and compared to the standard molds over the course of 12 months. For this comparison, the expansion of samples made of cement mixture with different additives with innovative and standard molds in sulfate attack was studied. The additives such as slag, silica fume, zeolite and rice husk ash were used and samples were made consisting of three different portions of each additive. In these molds, the increased length observed in 12 months was about 2.5 to 3 times greater than standard samples.

تسريع حمله سولفاتي , ASTM C1012 , دوام در برابر حمله سولفاتي

Accelerated sulfate attack , ASTM C1012 , Durability against sulfate attack

Mohamad Jazbi

Seyed Sajad Mirvalad - Pedram Ghaderi