Investigation of the Effect of Different Aggregates on the durability of Self-Compacting Concretes Exposed to Sulfate using "Friction-Transfer" method

Document Type : Original Article

Authors

1 Professor, Department of Civil Engineering, Engineering Faculty, Imam Khomeini International University, Qazvin, Iran

2 Master, Department of Civil Engineering, Imam Khomeini International University, Qazvin, Iran

3 Ph.D , Department of Civil Engineering, Imam Khomeini International University, Qazvin, Iran

Abstract

Despite the fact that in most operating conditions, concrete components, compaction and curing affect the performance of concrete, but premature failure of concrete structures due to problems with the durability of concrete structures also occurs a lot. Due to the lack of information on the effect of type and strength of aggregates on the durability of self-compacting concrete, in this article, using the tests of "friction transfer" and "drilled core" to investigate the effect of strength of different aggregates on the reliability of concrete Self-compacting has been exposed to sodium sulfate. 9 types of stones with the names of travertine, granite, basalt, andesite, marble, green stone tuff, crystal green tuff, rhyolite and limestone have been used to make self-compacting concretes. Compressive strength tests of self-compacting concretes cured with water and sodium sulfate solution were performed at ages 7, 14 and 28. The results showed that the volume change of rocks with higher water absorption percentage was less and there is a direct relationship between the compressive strength of self-compacting concretes treated in water and sodium sulfate solution with the strength of the parent rock. We also see an increase in compressive strength of self-compacting concrete placed in sodium sulfate solution at a young age compared to samples placed in water. There is also a linear relationship with a high correlation coefficient between the results of the friction transfer test and the core correction test. Compressive strength of crystalline green tuff, green tuff, andesite, rhyolite, travertine, lime, marble, granite and basalt are 31.76, 33.12, 39.92, 43.43, 48.41, 51/97, 59.66, 62.17 and 75.41 Mpa, respectively. With increasing compressive strength, the results of friction transfer test also increased so that for the mentioned rocks are equal to 132.4, 146.9, 155.9, 168, 176.3, 185.3, 189.8, 5 / 198 and 9/207 Nm.

Keywords

Main Subjects


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