Mechanical Properties of High Titanium Heavy Slag Fiber-reinforced Concrete

Considering the three main factors of fiber content,water-binder ratio and fly ash content,20 sets of high titanium heavy slag fiber-reinforced concrete specimens were designed using orthogonal experiments.The effect of fiber content,water-binder ratio and other factors on mechanical properties of titanium heavy slag fiber reinforced concrete were studied by SEM.The test results show that the water-binder ratio has the greatest impact on the flexural and compressive strength of the high titanium heavy slag concrete.Basalt fiber can significantly increase the flexural strength of the high titanium heavy slag concrete,and plastic steel fiber can significantly improve the compressive strength of the concrete.When the water-binder ratio is 0.32,the basalt fiber content is 1 kg,and the fly ash content is 5%,the flexural strength of the high titanium heavy slag fiber concrete reaches 5.61 MPa,which is 10% higher than that of the high titanium heavy slag concrete without fiber.At the water-binder ratio of 0.34,the plastic steel fiber content of 2 kg,and the fly ash content of 5%,the compressive strength of the high titanium heavy slag concrete reaches 60.45 MPa,satisfying the C55 level specified in Concrete Structure Design Code（GB50010—2010）.