Effect of cyclic loadings on heated self-compacting concrete

This experimental study examines the effect of cyclic loadings on heated self-compacting concrete (SCC). One hundred and eight standard cylindrical specimens and one hundred and eight cubic specimens were tested. Compressive strength of the concrete specimens was within the normal range with strengths of 25, 35, and 45 MPa. Test speed was within the quasi-static range. The cyclic loading was imposed within the compressive area. The concrete specimens were heated to 23 °C, 100 °C, 200 °C, 400 °C, 600 °C and 800 °C and then were exposed to monotonic compressive loading or cyclic loading. The stress–strain diagram, compressive strength, and SCC behavior under the cyclic and monotonic loadings before and after heating were compared. The results show that the heated concrete has a lower compressive strength. The heated concrete exhibits more strains in the cyclic loading. Development of cracks in all the heated and unheated specimens under cyclic loading is different.