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在混凝土拌合物中加进钢纤维,可以改善混凝土的冲击强度、抗弯强度、疲劳强度、韧性、抗裂性及抗剥落性能。由于钢纤维加筋混凝土抗冲击性能较好,常应用于水坝和溢洪道面层、工业门、桥面板面层、机场和公路。钢纤维的用量取决于使用方法、尺寸和形状。美国材料试验协会(ASTM)正在制定一个钢纤维的规范。通常的用量是每立方码混土加50～200磅钢纤维,相当于普通重混凝土体积的0.38％到1.5％。要使钢纤维在混凝土中混合均匀,防止结团,应将钢纤维掺进新拌混凝土中,常用方法有两种。
The addition of steel fibers to the concrete mix can improve the impact strength, flexural strength, fatigue strength, toughness, crack resistance, and spalling resistance of the concrete. Because steel fiber reinforced concrete has good impact resistance, it is often used in dams and spillways, industrial doors, bridge decks, airports, and highways. The amount of steel fiber depends on the method of use, size and shape. The American Society for Testing Materials (ASTM) is developing a specification for steel fibers. The usual dosage is 50 to 200 pounds of steel fiber per cubic yard of concrete, equivalent to 0.38% to 1.5% of the volume of normal heavy concrete. In order to mix steel fibers homogeneously in concrete and prevent clumping, steel fibers should be incorporated into fresh concrete. There are two common methods.