纤维水泥及制品_2021_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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纤维水泥及制品

BFRP增强水泥砂浆薄板力学性能试验研究

刘蒲云1，雷梦珂2,3，汪昕2,3，王凯辉2,3

2021年第10期

摘要

引用本文

摘要：通过四点弯曲试验和拉伸试验研究了灰砂比、增强材料种类及布置方式对水泥砂浆薄板力学性能的影响。结果表明：增大灰砂比能提高试件的弯曲开裂荷载；缩小BFRP筋的筋网尺寸能提高试件的极限荷载；增大BFRP网格厚度能改善试件的拉伸能力；掺短切玄武岩纤维的BFRP网格增强试件的抗弯和抗拉能力较好，是FRP永久模板的优选方案。 Abstract: Through four-point bending test and tensile test, the effect of cement-sand ratio, reinforcement material type and layout method on the mechanical properties of cement mortar slab was studied. The results show that the increase of cement-sand ratio can enhence the bending cracking load of the specimen. Reducing the size of BFRP bar mesh can increase the ultimate load of the specimen. Increasing the thickness of the BFRP mesh can improve the tensile capacity of the specimen. The BFRP mesh reinforced specimen mixed with chopped basalt fiber has good flexural and tensile capacity, which is the preferred scheme of FRP permanent formwork.

刘蒲云,雷梦珂,汪昕,等.BFRP增强水泥砂浆薄板力学性能试验研究[J].混凝土与水泥制品,2021(10):52-56,61. LIU P Y,LEI M K,WANG X,et al.Experimental Study on Mechanical Properties of BFRP Reinforced Cement Mortar Slab[J].China Concrete and Cement Products,2021(10):52-56,61.

玄武岩纤维混凝土弯曲破坏特征与韧性分析

王启1,2，赵俭斌1，董浩1，张延年1

2021年第10期

摘要

引用本文

摘要：通过三分点加载试验，研究了玄武岩纤维体积掺量（0、0.25%、0.50%、0.75%、1.00%、1.25%）和长度（6 mm、12 mm）对混凝土弯曲性能的影响。结果表明：长度为12 mm的玄武岩纤维对混凝土抗弯强度的改善效果较好；随着玄武岩纤维掺量的增加，试件的抗弯强度先增后减，且玄武岩纤维的最优掺量为1.00%；玄武岩纤维虽可改善混凝土的等效初始弯曲强度，但对初始弯曲韧度比影响较小，即对峰值荷载前的弯曲韧性改善效果较小。 Abstract: Through three-point loading test, the effect of basalt fiber volume content（0、0.25%、0.50%、0.75%、1.00%、1.25%） and basalt fiber length（6 mm、12 mm） on the flexural properties of concrete was studied. The results show that basalt fiber with the length of 12 mm is more beneficial to bending strength. With the increase of basalt fiber content, the bending strength of concrete first increases and then decreases, and the optimal basalt fiber content is 1.00%. Although basalt fiber can improve the equivalent initial bending strength of concrete, it has little effect on the initial bending toughness ratio, which means there is no obvious improvement of bending toughness before peak load.

王启,赵俭斌,董,浩,等.玄武岩纤维混凝土弯曲破坏特征与韧性分析[J].混凝土与水泥制品,2021(10):48-51. WANG Q,ZHAO J B,DONG H,et al.Analysis of Bending Failure Characteristics and Toughness of Basalt Fiber Reinforced Concrete[J].China Concrete and Cement Products,2021(10):48-51.

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