Keywords : Compressive strength
journal of kerbala university,
2018, Volume 14, Issue 1, Pages 287-299
Recently, there has been a lot of research that is concerned with developing the durability of concrete exposed to a sever environment in order to reduce the cost of maintenance, by making the maintenance in interval spacede specially in strategic projects that serve many people such as sewage and sewerage projects. In this study, the properties of the epoxy modified self compacted concrete were studied after being placed in a sever environment (partially submerged in septic tank) for different periods of 30, 90 and 180 days. Epoxy material was added to the self compacted concrete (SCC) in three different ratios 5, 7.5 and 10% of the cement weight. The properties studied in this work were compressive, splitting tensile strength, change in weight and total absorption. In general, and through the results of the tests, a deterioration in the reference SCC was observed due to exposure to extreme conditions. At 180 days of exposure it was observed that there was a noticeable decrease in compressive and tensile strength of 20.8% and 46.5%, for the reference SCC, respectively, compared to the same concrete prior to exposure. The exposure of the reference SCC to the sewerage environment led to a significant deterioration in the percentage of weight loss and absorption after 180 days of partial immersion in septic tank. The modification of SCC by the addition of epoxy resin resulted in a clear improvement in all properties examined and was the greatest improvement when using 10% of the epoxy. After 180 days of exposure to the sewerage environment, the increase in compressive and tensile strength of 10% epoxy SCC were 87% and 142%, respectively, compared to the reference SCC without epoxy resin.