Abstract
In this study, the concrete is mixed with glass fibers which are 0.5%, 1.0% and 1.5% of cement weight and 0.6 cm long. The effect of fiber addition level on the compressive strength, bending strength and residual compressive strength and thermal conductivity after heating of concrete is discussed. The test results show that an appropriate addition of glass fiber to the concrete at room temperature is favorable for the compressive strength. A low addition of relatively short glass fiber has insignificant effect on the bending strength. However, the adverse effect on the bending strength will increase if the addition level is too high. The addition of glass fiber can improve the loss of concrete strength under the effect of high temperature not exceeding 500°C, and a relatively high compressive strength remains under the effect of high temperature not exceeding 800°C. The high temperature can reduce the thermal conductivity of glass concrete, and the higher the addition level of glass fiber is, the lower is the thermal conductivity. Keywords: Glass fiber, concrete, heating, thermal conductivity
Highlights
The high temperature resistant fabric made of glass fiber still keeps 50% of strength when it burns at 370°C, and keeps 25% of strength at 538°C, its thermal expansion coefficient is low [1]
The concrete is mixed with glass fibers which are 0.5%, 1.0% and 1.5% of cement weight and 0.60 cm long respectively, to discuss the effect of fiber addition level on the compressive strength, bending strength, residual compressive strength and thermal conductivity after heating of concrete
The results show that in the environment at room temperature, a low addition of short glass fiber to the concrete is favorable for the strength
Summary
The high temperature resistant fabric made of glass fiber still keeps 50% of strength when it burns at 370°C, and keeps 25% of strength at 538°C, its thermal expansion coefficient is low [1]. The glass fiber has higher compressive strength and elastic coefficient than cement mortar, so that it becomes an ideal reinforcer. The glass fiber with ZrO2 is water resistant, so it is best suited for concrete [3]. The flexural strength increases with the glass fiber content, but the strength growth rate does not decrease. The compressive strength is unrelated to the length of glass fiber. This study simulates the effect of an approximate addition of glass fiber to the concrete on the compressive strength, tensile strength and thermal conductivity of concrete in the fire
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
