EXPERIMENTAL STUDY ON THE MECHANICAL PROPERTIES OF BASALT FIBER-REINFORCED CONCRETE UNDER LOW TEMPERATURE CURING
In order to study the mechanical properties of basalt fiber-reinforced concrete under low temperature curing,a series of compressive and tensile tests were conducted for specimens under different curing temperature(20℃,5℃,0℃,-5℃,-10℃and-15℃)and curing age(3 d,7 d,14 d and 28 d).Experimental results show that curing temperature has an important impact on the strength of basalt fiber-reinforced concrete.Under the same curing age,the compressive and tensile strength of basalt fiber-reinforced concrete increase gradually with the rise of curing temperature.And under different curing age,the strength difference between specimens with same curing temperature increase gradually.Additional,the early compressive and tensile strength(3 d and 7 d)of the specimens developed rapidly,however,its strength increase slowly after 14 d.Ultrasonic test show that there is a correlation between strength and ultrasonic wave velocity for basalt fiber-reinforced concrete,and the two presents a better quadratic function relationship.The experiment can provide further reference for the construction and detection of water conservancy projects in cold region or winter.
low temperature curingbasalt fiber-reinforced concretecompressive strengthtensile strengthultrasonic test
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