Creep and shrinkage behaviour of normal strength concrete / Nor Maslina Mohsan, Khalimi Johan Abd Hamid and Nurul Huda Suliman

This paper investigates the creep and shrinkage behaviour of normal strength concrete in the Malaysian environment. The tests carried out were creep test and shrinkage test. The grades of normal strength concrete used in this test were grade 25 and grade 30. The testing was performed in a
condition of 80% relative humidity and temperature of 27°C to represent the Malaysia environment condition. The creep was measured from the age of concrete loaded at 7 days with stress/strength ratio of 30%. The creep tests were performed in accordance with ASTM C512-87. Results showed that for grade 30 concrete, there was no significant difference in shrinkage between two maximum aggregate sizes as compared to grade 25 concrete. However, there was significant difference in creep between two maximum aggregate sizes for grade 30 concrete. Results also indicated that the higher shrinkage and creep were obtained for grade 30 concrete. The maximum aggregate size and cement content were found to influence the shrinkage and creep in this study.