摘   要：研究了玄武岩纤维（BF）的形状（短切、束状）、制备方法（湿拌法、半干拌法和干拌法）对混凝土坍落度、抗压强度和劈裂抗拉强度的影响。结果表明：两种BF的掺入均降低了混凝土的坍落度，且短切BF的降低效果更显著；在不同的制备方法下，束状BF的掺入均能提高混凝土的抗压和劈裂抗拉强度；短切BF混凝土的劈裂抗拉强度仅在采用半干拌法时与对照组持平，在采用湿拌法和干拌法时，短切BF混凝土的抗压强度和劈裂抗拉强度均低于对照组。 Abstract: The effects of basalt fiber (BF) shapes (chopped, bundled), preparation methods (wet mixing, semi-dry mixing, dry mixing) on the slump, compressive strength and splitting tensile strength of concrete were investigated. The results show that the incorporation of both kinds of BF reduces the slump of concrete, and the reduction effect of chopped BF is more significant. The incorporation of bundled BF improves the compressive and splitting tensile strength of concrete under different preparation methods. The splitting tensile strength of chopped BF reinforced concrete is only equal to that of the control group when concrete is prepared by semi-dry mixing method, and the compressive strength and splitting tensile strength of chopped BF reinforced concrete are lower than those of the control group when concrete is prepared by wet mixing method or dry mixing method.

彭飞,万磊,钱朝军,等.玄武岩纤维混凝土的制备方法及其性能研究[J].混凝土与水泥制品,2024(9):58-61,66. PENG F,WAN L,QIAN C J,et al.Study on preparation methods and properties of basalt fiber reinforced concrete[J].China Concrete and Cement Products,2024(9):58-61,66.

摘   要：将不同长度（8、13、16、20 mm）的平直型钢纤维（SF）、波纹型SF分别与长度为13 mm的端钩型SF混掺到UHPC中，研究了不同SF混杂组合对UHPC试件扩展度、抗弯强度和弯曲韧性的影响。结果表明：增加平直型SF和波纹型SF的长度降低了混杂纤维UHPC的扩展度；在受荷初期，UHPC基体与SF共同承受外力，且前者是主要承受者，当UHPC基体开裂后，横跨裂缝的SF成为外力的主要承受者；随着平直型SF和波纹型SF长度的增加，混杂纤维UHPC试件的抗弯强度、峰值挠度基本上呈逐渐增大趋势，弯曲韧性先降低后升高。 Abstract: Flat type and corrugated type steel fibers(SF) of different lengths(8, 13, 16, 20 mm) were blended with end hooked type SF of length of 13 mm into UHPC, respectively, and the effects of different SF hybrid combinations on the extensibility, bending strength and bending toughness of UHPC specimens were investigated. The results show that increasing the length of flat type SF and corrugated type SF leads to a decrease in the extensibility of UHPC with hybrid fibers. At the initial stage of loading, the UHPC matrix and SF share the external force, of which the former is the main bearer, and when the UHPC matrix cracks, the SF across the crack becomes the main bearer of the external force. With the increase of the length of the flat type SF and corrugated type SF, the bending strength and peak deflection of UHPC specimens with hybrid fibers basically tends to increase gradually, and the bending toughness first decreases and then increases.

王杰,周志威,邱祥健,等.混杂钢纤维对UHPC弯曲性能的影响研究[J].混凝土与水泥制品,2024(9):62-66. WANG J,ZHOU Z W,QIU X J,et al.Study on the effect of blended steel fiber on the bending property of UHPC[J].China Concrete and Cement Products,2024(9):62-66.

王洪镇,李文琦,甘季中,等.碳纤维和EPS颗粒对RPC性能的影响[J].混凝土与水泥制品,2024(9):67-71. WANG H Z,LI W Q,GAN J Z,et al.Effect of carbon fiber and EPS particles on the performance of RPC[J].China Concrete and Cement Products,2024(9):67-71.