In order to improve the crack resistance of concrete,the research group developed a concrete material based on heat-shrinkable fiber,which improved the cracking resistance of concrete by using the stress generated by fiber shrink-age during temperature rise.In order to explore the mechanical properties of this kind of concrete,26 groups of 112 con-crete test blocks were designed and prepared,and the stress-strain curve of heat-shrinkable fiber-reinforced concrete(HFC)was compared and analyzed by simulating the temperature rise by the steam curing of the test block according to the fiber content of 2.0 kg/m3.The results show that the mechanical properties of HFC are better than those of polypro-pylene fiber-reinforced concrete and plain concrete,and the axial tensile strength is increased by 30.17％and 31.96％,re-spectively,indicating that heat-shrinkable fiber has a significant effect on the crack resistance of concrete.At the same time,the constitutive relationship of HFC is established,and the research work provides a theoretical and experimental ba-sis for the application of HFC.
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