Experimental Study On The Performance Of The Basalt Fiber Concrete Resistance To Freezing And Thawing

Basalt fiber has superior mechanical properties and many advantages such asresisment to high temperature and acid, low prices, environmental drawing and productionprocesses. So it has become a new kind of concrete reinforcing materials. The mechanicalproperties of basalt fiber reinforced concrete is the focus of current research. This papermainly carries out experimental study and finite element numerical simulation on theperformance of the basalt fiber concrete resistance to freezing and thawing durabilityperformance. And then it reaches some conclusions.(1)The paper firstly carries out experimental study on the two basic mechanicalproperties of the performance of basalt fiber reinforced concrete resistance to compressiveand flexural. The results show that: basalt fiber can effectively improve the compressiveand flexural strength of concrete. The compressive strength of concrete reaches to the peakwhen the fiber volume content of0.1%and the flexural strength of concrete reaches to thepeak when the fiber volume content of0.3%.(2)The paper carries out experimental study on the performance of the basalt fiberconcrete resistance to freezing and thawing. The results show that: the relative dynamicelastic modulus change and loss of quality of basalt fiber reinforced concrete in freezingand thawing process is obviously superior than plain concrete, and it has the bestperformance when the basalt fiber content is0.3%.(3)The paper carries out experimental study on the performance of the basalt fiberconcrete resistance to freezing and thawing under5%NaCl solution,5%MgSO4solutionand (5%MgCl2+5%Na2SO4) corrosion conditions composite solution. The results showthat: basalt fiber can effectively improve the corrosion resistance of concrete. It canenhance the performance of concrete resistance to freezing and thawing and extend thefreeze-thaw resistance of concrete under cyclic corrosion conditions in life.(4)The paper carries out ANSYS finite element numerical simulation on theperformance of the basalt fiber concrete resistance to freezing and thawing performance and further validates the effect of basalt fiber reinforced concrete for freeze-thaw resistanceproperties. The results show that: with the increase in incorporation of fibers, fiberreinforced concrete due to internal stresses caused by low temperature decreased,freeze-thaw damage decreases. When the fiber volume content of0.3%, the basalt fiberreinforced concrete due to internal stresses caused by freeze-thaw damage minimal,anti-freeze-thaw best.