近几年来,合成纤维在混凝土中的用量迅速增长并逐渐在世界范围内(包括我国和苏联)推广。由于在混凝土中掺用纤维后能够显著改善混凝土的性能,因而在混凝土施工中使用纤维,基本上都能有一定的效益,在预制混凝土工业中尤为突出。例如,可以减少辅助焊接钢丝网的使用,减少预制制品的坍落、开裂和脱模过程中的粘结,以及减少运输过程中因装卸 In recent years, the amount of synthetic fiber used in concrete has grown rapidly and is gradually spreading throughout the world (including China and the Soviet Union). Since the use of fibers in concrete can significantly improve the performance of concrete, the use of fibers in concrete construction can basically have certain benefits, especially in the precast concrete industry. For example, the use of an auxiliary welded wire mesh can be reduced, the collapse of prefabricated products, cracking and sticking during demolding can be reduced, and the handling can be reduced during transportation.