摘要
为了研究玻璃纤维混凝土力学性能发展变化规律,将0、2、4、6、8、10和12 kg/m^(3)的普通玻璃纤维和耐碱玻璃纤维分别按掺入混凝土中。结果表明,立方体抗压强度和抗折强度随玻璃纤维掺量的增加先增大后减小,劈拉强度随玻璃纤维掺量的增加而增大。玻璃纤维对劈拉强度的改善效果最好,其次是抗折强度,对立方体抗压强度的改善效果最小。随着玻璃纤维掺量的增加,混凝土拉压比增大,折压比先增大后减小。试验结果表明,掺加8 kg/m^(3)普通玻璃纤维或6 kg/m^(3)耐碱玻璃纤维对混凝土的力学性能、脆性和抗裂性能的改善效果最好,耐碱玻璃纤维的改善效果比普通玻璃纤维好。根据试验数据,提出了混凝土力学性能随玻璃纤维掺量变化的计算模型,可供工程实践参考。
In order to study the development and changes in the mechanical properties of glass fiber reinforced concrete,ordinary glass fibers of 0,2,4,6,8,10 and 12 kg/m^(3)and alkali resistant glass fibers were added to the concrete separately.The results show that the compressive strength and flexural strength of the cube first increase and then decrease with the increase of glass fiber content,while the splitting tensile strength increases with the increase of glass fiber content.Glass fiber has the best improvement effect on splitting tensile strength,followed by flexural strength,and has the smallest improvement effect on cube compressive strength.With the increase of glass fiber content,the tensile compression ratio of concrete increases,while the flexural compression ratio first increases and then decreases.The experimental results show that the addition of 8 kg/m^(3)ordinary glass fiber or 6 kg/m^(3)alkali resistant glass fiber has the best improvement effect on the mechanical properties,brittleness,and crack resistance of concrete,and the improvement effect of alkali resistant glass fiber is better than that of ordinary glass fiber.Based on experimental data,a calculation model for the variation of mechanical properties of concrete with the addition of glass fiber is proposed,which can be used as a reference for engineering practice.
作者
段小芳
袁娇娇
DUAN Xiao-fang;YUAN Jiao-jiao(School of Construction Engineering,Nantong Open University,Nantong 226006,China;School of Civil Engineering and Transportation,Hohai University,Nanjing 210098,China)
出处
《南阳理工学院学报》
2023年第2期73-78,共6页
Journal of Nanyang Institute of Technology
基金
2018年江苏省住房和城乡建设厅科学技术指导项目(2018ZD190)
2018年住建部科研开发项目(2018-K5-009)
2019年南通市科技计划指导性项目(MSZ19224)
2022年南通市建设系统科技项目(11)。
关键词
玻璃纤维
抗压强度
抗拉强度
抗折强度
拉压比
折压比
glass fiber
compressive strength
tensile strength
flexural strength
tension-compression ratio
flexural-compression ratio
