水泥混凝土用聚乙烯醇纤维的耐碱性能研究
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摘要
为研究聚乙烯醇纤维(PVA)在水泥和混凝土中的稳定性,将聚乙烯醇纤维置于不同温度、不同碱性环境中来研究其性能变化规律。测试不同时间下,聚乙烯醇纤维浸泡后的直径变化、断裂强度保留率和断裂伸长率保留率。结果表明,聚乙烯醇纤维在碱溶液的浸泡下,随着时间延长,直径和断裂伸长率逐渐增加,强度逐渐降低;升高环境温度、增加浸泡溶液浓度,对聚乙烯醇纤维的性能有显著的影响。
For the study of polyvinyl alcohol fiber(PVA)in cement and concrete hydration process stability,the polyvinyl alcohol fibers under different temperature,different alkaline environment to study its performance.The diameter variation,fracture strength retention rate and elongation retention rate of polyvinyl alcohol fiber were tested at different times.The results showed that the elongation of the polyvinyl alcohol fiber in alkali solution increased with time,the diameter and fracture elongation increased gradually,and the strength gradually decreased.The increase of ambient temperature and the concentration of soaking solution have a significant effect on the performance of polyvinyl alcohol fiber.
For the study of polyvinyl alcohol fiber(PVA)in cement and concrete hydration process stability,the polyvinyl alcohol fibers under different temperature,different alkaline environment to study its performance.The diameter variation,fracture strength retention rate and elongation retention rate of polyvinyl alcohol fiber were tested at different times.The results showed that the elongation of the polyvinyl alcohol fiber in alkali solution increased with time,the diameter and fracture elongation increased gradually,and the strength gradually decreased.The increase of ambient temperature and the concentration of soaking solution have a significant effect on the performance of polyvinyl alcohol fiber.
引文
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[2]宋心远,沈煜如.新型染整技术[M].北京:中国纺织出版社,1999.
[3]丁铸,邢锋,张晓强.有机仿钢纤维和钢纤维对钢渣混凝土性能的影响[J].中国粉体技术,2010,16(4):71-74.
[4]高鹏锟,胡微微,赵党锋,等.聚丙烯、玄武岩纤维和耐碱玻璃纤维耐碱性能对比分析[J].天津纺织科技,2011(1):19-21,24.
[5]马佳晨,张炉青,张学旭,等.改性水泥基材料用聚乙烯醇纤维耐碱性能研究[J].中国粉体技术,2015,21(2):61-63.
[6]梁济丰,吕磊,余晓青.聚乙烯醇纤维增强水泥基复合材料力学性能试验研究[J].混凝土与水泥制品,2013(11):48-51.
[7]ARANDIGOYEN M,ALVAREZ J I.Pore structure and mechanical properties of cement-lime mortars[J].Cement and Concrete Research,2007(37):767-775.
[8]胡祖明,刘兆峰,钱国忠,等.高强聚乙烯醇纤维及其在复合材料中的应用[J].产业用纺织品,1998(2):30-33.
[9]邓宗才.高性能合成纤维混凝土[M].北京:科学出版社,2003.
[10]张凡,吴翠娥,宋明星,等.玻璃纤维的碱腐蚀及其对混凝土结构安全性影响的研究[J].江西建材,2015(12):235-242.
[11]林天扬,王春红,Sheraz,等.碱处理提取竹黄纤维的响应曲面优化[J].复合材料学报,2018(4):876-884.
[12]詹怀宇.纤维素化学与物理[M].北京:科学出版社,2005:109.
[13]郑明霞,李来庆,郑明月,等.碱处理对玉米秸秆纤维素结构的影响[J].环境科学与技术,2012,35(6):27-31.
[14]谢琼.连续纤维增强复合筋/索耐腐蚀性能试验研究[D].南京:东南大学,2011.
[15]张光超.多因素耦合作用下FRP耐腐蚀性能试验研究[D].南京:东南大学,2012.
[16]CHEN Y,DAVALOS J F,RAY I,et al.Accelerated aging tests for evaluations of durability performance of FR Preinforcing bars for concrete structures[J].Composite Structures,2007,78(1):101-111.
[17]杨锦富,杨素英.合成纤维的强力与伸长率[J].中国纤检,2004(2):17-18.