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当前位置:钢纤维混凝土的基本性能
钢纤维混凝土的基本性能
[来源:http://www.gangxianwei51.com] [作者:567zx] [日期:18-12-24] [浏览次数:]

钢纤维混凝土的基本性能 Basic properties of steel fiber reinforced concrete (1)强度和重量比值增大。这是钢纤维混凝土具有优越经济性的重要标志。 (1) the ratio of strength to weight is increased. This is an important sign of steel fiber reinforced concrete with superior economy. (2)具有较高的抗拉、抗弯、抗剪和抗扭强度。在混凝土中掺入适量钢纤维,其抗拉强度提高25%~50%,抗弯强度提高40%~80%,抗剪强度提高50%~100%。 (2) high tensile strength, bending resistance, shear strength and torsional strength. In the concrete, the tensile strength of the steel fiber is increased by 25% to 50%, the bending strength is increased by 40% to 80%, and the shear strength is increased by 50% to 100%. (3)具有卓越的抗冲击性能。材料抵抗冲击或震动荷载作用的性能,称为冲击韧性,在通常的纤维掺量下,冲击抗压韧性可提高2~7倍,冲击抗弯、抗拉等韧性可提高几倍到几十倍。 (3) excellent impact resistance. The properties of material resistance to impact or vibration load are called impact toughness. Under the ordinary fiber content, the impact compression toughness can be increased by 2~7 times, and the toughness of the impact bending and tensile can be increased by several times to several times. (4)收缩性能明显改善。在通常的纤维掺量下,钢纤维混凝土较普通混凝土的收缩值降低7%~9%。 (4) the shrinkage performance was obviously improved. Under the usual fiber content, the shrinkage value of steel fiber reinforced concrete is lower than that of ordinary concrete by 7% to 9%. (5)抗疲劳性能显著提高。钢纤维混凝土的抗弯和抗压疲劳性能比普通混凝土都有较大改善。 (5) the anti fatigue performance was significantly improved. The flexural and compressive fatigue properties of steel fiber reinforced concrete are much better than those of ordinary concrete. (6)耐久性能显著提高。钢纤维混凝土除抗渗性能与普通混凝土相比没有明显变化外,由于钢纤维混凝土抗裂性、整体性好,因而耐冻融性、耐热性、耐磨性、抗气蚀性和抗腐蚀性均有显著提高。例如,掺量为1%、强度等级为CF35的钢纤维混凝土耐磨损失比普通混凝土降低30%。掺有2%钢纤维高强混凝土抗气蚀能力较其他条件相同的高强混凝土提高1.4倍。钢纤维混凝土在空气、污水和海水中都呈现良好的耐腐蚀性,暴露在污水和海水中5年后的试件碳化深度小于5mm,只有表层的钢纤维产生锈斑,内部钢纤维未锈蚀,不像普通钢筋混凝土中钢筋锈蚀后,锈蚀层体积膨胀而将混凝土胀裂。 (6) the durability improved significantly. The anti seepage property of steel fiber concrete has no obvious change compared with that of ordinary concrete. As the crack resistance and integrity of the steel fiber concrete are good, the resistance to freezing and thawing, heat resistance, wear resistance, corrosion resistance and corrosion resistance of steel fiber reinforced concrete are greatly improved. For example, the wear resistance of steel fiber reinforced concrete with a dosage of 1% and a strength grade of CF35 is 30% lower than that of ordinary concrete. The corrosion resistance of high-strength concrete mixed with 2% steel fiber is 1.4 times higher than that of other high strength concrete. Steel fiber concrete exhibits good corrosion resistance in air, sewage and sea water. After 5 years of exposure to sewage and seawater, the carbonization depth of the specimens is less than 5mm. Only the steel fibers in the surface layer produce rust spots, and the internal steel fibers are not corroded. Unlike the corrosion of the steel bars in the ordinary reinforced concrete, the corrosion layer expands to the concrete. Bulge.

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