防裂纤维是以其良好的分散性三维乱向立体分布在砂浆、水泥混凝土中，因其突出的抗拉强度在混凝土或者砂浆中有着强力的拉附作用，从而起到抗裂防渗效果。
介绍了钢纤维混凝土的破坏机理，认为采用钢纤维混凝土是混凝土防裂效果较好的一种措施，应在设计和施工中给以重视。
It introduces the destruction mechanism of steel fiber concrete, which is one kind of better form guarding against splitting, and should attach importance to it in design.
聚丙烯纤维和轻烧氧化镁双掺技术的应用，在面板混凝土的防裂中发挥了明显的作用。
The application of the technology of adding both polyacrylic fiber and lightly sintered magnesia in concrete played a remarkable role in crack control of concrete facing slabs.
试验结果表明，在混凝土中掺入聚丙烯纤维可以提高混凝土的韧性，抑制混凝土的开裂过程，从而有效达到防裂的目的。
The experiment result shows that adding polypropylene fiber into concrete can improve its ductility and inhibit its cracking process and ultimately achieve the cracking-control aim.
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