短切纤维对透水混凝土性能的影响
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摘要
研究了3种短切纤维(聚丙烯纤维PPF,聚乙烯醇纤维PVAF和玻璃纤维GF)掺量及长度对透水混凝土力学性能和透水性能的影响.结果表明:随着PPF长度的增大,透水混凝土的抗压强度先增大后减小,当PPF长度为12mm时,不同掺量的PPF均使透水混凝土的抗压强度低于空白对照组;透水混凝土的抗折强度随PPF长度和掺量的增大而增大;PPF的掺入导致透水混凝土的空隙率和透水系数减小;当掺入长度为6mm的PVAF时,透水混凝土的抗压强度和抗折强度均得以提高,但掺入长度为6mm的GF时,透水混凝土的抗压强度降低;PVAF和GF的掺入均降低了透水混凝土的空隙率和透水系数.
Influence of different types of chopped fiber(polypropylene fiber(PPF), polyvinyl alcohol fiber(PVAF) and glass fiber(GF)) dosages and lengths on mechanical properties and permeability properties of pervious concrete was studied. With the increase of PPF length, compressive strength increases firstly and then decreases. When length is 12 mm, compressive strength of pervious concrete with different PPF dosages are lower than control group. Flexural strength increases with the increase of PPF length or dosage. Adding PPF results in the decline of porosity and permeability coefficient. When concrete is mixed with 6 mm-long PVAF, compressive strength and flexural strength are improved. While 6 mm-long GF is added, compressive strength decreases. Moreover, PVAF and GF both lead to decrease of porosity and permeability coefficient.
Influence of different types of chopped fiber(polypropylene fiber(PPF), polyvinyl alcohol fiber(PVAF) and glass fiber(GF)) dosages and lengths on mechanical properties and permeability properties of pervious concrete was studied. With the increase of PPF length, compressive strength increases firstly and then decreases. When length is 12 mm, compressive strength of pervious concrete with different PPF dosages are lower than control group. Flexural strength increases with the increase of PPF length or dosage. Adding PPF results in the decline of porosity and permeability coefficient. When concrete is mixed with 6 mm-long PVAF, compressive strength and flexural strength are improved. While 6 mm-long GF is added, compressive strength decreases. Moreover, PVAF and GF both lead to decrease of porosity and permeability coefficient.
引文
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[2] ZAETANG Y,WONGSA A,SATA V,et al.Use of lightweight aggregates in pervious concrete[J].Construction and Building Materials,2013,48:585-591.
[3] 尹健,张贤超,宋卫民,等.基于混料设计理论的透水混凝土骨料特征响应分析[J].建筑材料学报,2013,16(5):846-852.YIN Jian,ZHANG Xianchao,SONG Weimin,et al.Response analysis of pervious concrete aggregate gradation characteristics based on theory of mixture design[J].Journal of Building Materials,2013,16(5):846-852.(in Chinese)
[4] 蒋正武,孙振平,王培铭.若干因素对多孔透水混凝土性能的影响[J].建筑材料学报,2005,8(5):513-519.JIANG Zhengwu,SUN Zhenping,WANG Peiming.Effects of some factors on properties of porous pervious concrete[J].Journal of Building Materials,2005,8(5):513-519.(in Chinese)
[5] BONICELLI A,GIUSTOZZIF,CRISPINO M.Experimental study on the effects of fine sand addition on differentially compacted pervious concrete[J].Construction and Building Materials,2015,91:102-110.
[6] JIMMA B,RANGARAJU P.Chemical admixtures dose optimization in pervious concrete paste selection-A statistical approach[J].Construction and Building Materials,2015,101:1047-1058.
[7] KUO W T,LIU C,SU D S.Use of washed municipal solid waste incinerator bottom ash in pervious concrete[J].Cement & Concrete Composites,2013,37:328-335.
[8] RIVERA N,PEREZ L,JOHN J,et al.Optimization of pervious concrete containing fly ash and iron oxide nano-particles and its application for phosphorus removal[J].Construction and Building Materials,2015,93:22-28.
[9] CHANG J,YEIH W,CHUNG T,et al.Properties of pervious concrete made with electric arc furnace slag and alkali-activated slag cement[J].Construction and Building Materials,2016,109:34-40.
[10] ZAETANG Y,WONGSA A,SATA V,et al.Use of coal ash as geopolymer binder and coarse aggregate in pervious concrete[J].Construction and Building Materials,2015,96:289-295.
[11] TORRES A,HU Jiang,RAMOS A.The effect of the cementitious paste thickness on the performance of pervious concrete[J].Construction and Building Materials,2015,95:850-859.
[12] HESAMI S,AHMADI S,NEMATZADEH M.Effects of rice husk ash and fiber on mechanical properties of pervious concrete pavement[J].Construction and Building Materials,2014,53:680-691.
[13] RANGELOV M,NASSIRI S,HASELBACH L,et al.Using carbon fiber composites for reinforcing pervious concrete[J].Construction and Building Materials,2016,126:875-885.
[14] AKAND L,YANG M J,WANG X N.Effectiveness of chemical treatment onpolypropylene fibers as reinforcement in pervious concrete[J].Construction and Building Materials,2018,163:32-39.
[15] 刘肖凡,林武星,李继祥.刚性聚丙烯纤维改性透水混凝土耐久性能研究[J].混凝土,2017(1):133-136.LIU Xiaofan,LIN Wuxing,LI Jixiang.Durability performance research on permeable concrete with rigid polypropylene fiber[J].Concrete,2017(1):133-136.(in Chinese)
[16] KEREKES R,CHELL C.Characterization of fiber flocculation regimes by a crowding factor[J].Journal of Pulp and Paper Science,1992,18(1):32-38.