高温后玄武岩纤维混凝土抗压强度与孔隙结构变化规律研究
Study on the Variation Law of Compressive Strength and Pore Structure of Basalt Fiber Reinforced Concrete after High Temperature
许昊 1王晓磊 1刘历波1
作者信息
- 1. 河北工程大学 土木工程学院, 河北 邯郸 056038
- 折叠
摘要
为了研究高温损伤后不同掺量玄武岩纤维混凝土的孔隙结构和力学性能的变化规律,以及高温后孔隙结构对宏观力学性能的影响.对不同体积掺量(0.5%、1%、1.5%)的玄武岩纤维混凝土进行 200～800℃高温处理,运用饱和水法测量其在不同高温后的孔隙率,并对不同高温后的玄武岩纤维混凝土试块进行抗压强度试验.结果表明:随着温度的升高,玄武岩纤维混凝土的孔隙率不断增大,200℃高温作用后孔隙率增长缓慢,超过400℃高温作用后孔隙率则迅速增大;抗压强度先增大后降低,经过200℃高温作用后抗压强度达到峰值,经过 800℃高温作用后抗压强度急剧下降.
Abstract
So as to check the pore structure and mechanical properties of volcanic rock fiber concrete when extreme temperature injury,and therefore the influence of pore structure on large mechanical properties when extreme temperature.during this paper,volcanic rock fiberconcretewith totally different volume content(0% ,0.5% ,1% ,1.5% )was treated at 200-800℃ .At the same time,saturated water methodology was accustomed live the porosity when totally different high temperatures,and therefore the compressive strength of volcanic rock fiber concrete blocks when totally different high temperatures was tested.The results show that the porosity of volcanic rock fiber concrete will increase with the rise of temperature.The porosity will increase slowly when 200℃ extreme temperature,and will increase quickly when 400℃ extreme temperature.The compressive strength initial enhanced then diminished.When 200℃ extreme temperature,the compressive strength reached the height,and when 800℃ extreme temperature,the compressive strength diminished sharply.
关键词
混凝土/玄武岩纤维/高温损伤/孔隙结构Key words
concrete/basalt fiber/high temperature damage/pore structure引用本文复制引用
出版年
2024
NETL
NSTL
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