WATER TRANSPORT IN POLYVINYL ALCOHOL FIBER REINFORCED GEOPOLYMER COMPOSITES
The ordinary Portland cement-based concrete suffer from brittleness and potential of cracking, which generally accompany with degradation of durability.Many studies have shown that the water transport properties of concrete are related to its durability closely.In this paper, the basic mechanical properties involving strengths, stress-strain diagrams and other indexes during uniaxial tension, four-point bending and compression of Polyvinyl Alcohol (PVA) fiber reinforced geopolymer composites were investigated, so does the water transport in specimens before and after loading.It can be found that PVA fiber reinforced geopolymer composites exhibit obvious characteristics of strain hardening.A lot of micro cracks arise in specimen associated with increased tensile or bending deformation.These micro cracks, whose width is less than 100 μm, can effectively prevent water from penetrating too quickly as the results shown.And PVA fiber can improve the flexural response, toughness.As the same time, the effects of different fiber content and different fly ash content on water transport are compared.The research findings show that the permeability coefficient of PVA fiber reinforced geopolymer composites decreases with the increase of fiber content.The content of fly ash also has an important influence on the permeability coefficient of PVA fiber reinforced geopolymer composites.
Mechanical property PVA fiber reinforce material Water transport property Strain-hardening Geopolymer
Chen Shen Xiaomei Wan Tiejun Zhao Yu Lu
School of Civil Engineering, Qingdao University of Technology, Qingdao, China School of Civil Engineering, Qingdao University of Technology, Qingdao, China;Cooperative Innovation
国际会议
福州
英文
432-444
2018-11-07（万方平台首次上网日期，不代表论文的发表时间）