基于多种纤维的超高强度纤维增强混凝土基本性质研究  

Experimental study on basic properties of ultra-high-strength fiber-reinforced concrete containing ordinary Portland cement and various fiber

作　　者：郝亚琳[1] 谭维佳[2] 郭培玺 HAO Yalin;TAN Weijia;GUO Peixi(School of Civil Engineering,Sanjiang University,Nanjing 210012,China;College of Geological Engineering and Survey,Chang′an University,Xi′an 710054,China;Xijing University,Xi′an 710123,China;Shaanxi Key Laboratory of Safety and Durability of Concrete Structures,Xi′an 710123,China)

机构地区：[1]三江学院土木工程学院,江苏南京210012 [2]长安大学地质工程与测绘学院,陕西西安710054 [3]西京学院,陕西西安710123 [4]陕西省混凝土结构安全与耐久性重点实验室,陕西西安710123

出　　处：《混凝土》2021年第8期14-19,共6页Concrete

基　　金：国家自然科学基金资助项目(51568007)。

摘　　要：超高强度纤维增强混凝土是通过混合钢纤维来改善弱拉伸特性的材料,因此具备了高强度、高韧性的特性。为了详细分析在现场施工中常常使用的常温硬化型超高强度纤维增强混凝土的基本性质,在本研究中,将各种纤维混合到高强度灰浆中,并对不同的纤维的种类以及不同混合比例对常温硬化型超高强度纤维增强混凝土的基本特性产生的影响进行了分析,以确定其适用性。研究结果表明:非金属纤维混和并不会导致强度显著增加,而混合短长度的铜纤维可以满足设计要求的强度。本研究可为今后混凝土施工以及维护管理提供一些参考。Ultra-high strength fiber reinforced concrete is one kind of material that improves weak tensile properties by mixing steel fibers,so it has high strength and high toughness.In order to analyze the basic properties of normal temperature curing type ultra-high-strength fiber-reinforced concrete that has been often used in field construction.In this study,various fibers were mixed into high-strength mortar,and the effects of different fiber types and different mixing ratios on the basic characteristics of normal temperature curing type ultra-high-strength fiber-reinforced concrete were analyzed to determine their applicability.The research results show that the blending of non-metallic fibers does not lead to a significant increase in strength,and the blending of short-length copper fibers can meet the strength required by the design.It can provide some references for future concrete construction and maintenance management.

关 键 词：超高强度纤维增强混凝土 金属纤维 可加工性 短纤维 

分 类 号：TU528.572[建筑科学—建筑技术科学]