制备工艺对再生骨料透水混凝土中聚乙烯醇纤维分散性的影响

详细信息    查看全文 | 推荐本文 |

英文篇名：Influence of Different Preparation Technology on the Dispersion of PVA Fiber in Recycled Aggregate Pervious Concrete 作者：黄军福 ; 王福胜 ; 崔辉 ; 周敬勇 ; 夏晓松 英文作者：HUANG Jun-fu;WANG Fu-sheng;CUI Hui;ZHOU Jing-yong;XIA Xiao-song;Department of Architectural Engineering,Hefei Technology College;Anhui Wanwei Updated High-Tech Material Industry Co.,Ltd.; 关键词：PVA纤维 ; 再生骨料透水混凝土 ; 制备工艺 ; 力学性能 ; 分散性 英文关键词：polyvinyl alcohol fiber;;recycled aggregate pervious concrete;;preparation technology;;mechanical perperty;;dispersion 中文刊名：GSYT 英文刊名：Bulletin of the Chinese Ceramic Society 机构：合肥职业技术学院建筑工程学院;安徽皖维高新材料股份有限公司; 出版日期：2019-03-15 出版单位：硅酸盐通报 年：2019 期：v.38;No.270 基金：安徽省高校自然科学研究重点项目(KJ2016A615) 语种：中文; 页：GSYT201903053 页数：5 CN：03 ISSN：11-5440/TQ 分类号：313-317

摘要

为研究再生骨料透水混凝土中聚乙烯醇(PVA)纤维的分散性,设计了三种不同的制备工艺流程。通过不同工艺制得的试样力学性能测试,结合试验过程和试样破坏形态的观测,评价了三种工艺流程对PVA纤维分散性的影响程度,同时研究了搅拌时间对PVA纤维分散性的影响。试验结果表明:制备工艺对纤维分散性影响显著。在工艺2流程下,分散效果最佳,强度性能也表现为最好,其抗压强度和劈裂抗拉强度分别较未掺加纤维时提高37.9%和18.6%;适当延长搅拌时间有利于纤维的进一步分散,但达到一定时间后,分散性能开始下降;另外,试样的破坏形态也反映了纤维的分散状况。纤维分散越均匀,试样破坏时完整性越好。
        In order to study the dispersion of polyvinyl alcohol (PVA) fibers in recycled aggregate pervious concrete,three different preparation processes were designed. The influences of three processes on the dispersion of PVA fibers were evaluated by means of mechanical property test of samples made by different technologies, combined with experimental process and sample damage form observation.Meanwhile,the effects of mixing time on the dispersion of PVA fibers were studied. The experimental results show that the preparation process has a significant influence on fiber dispersion. The effect of fiber dispersion is the greatest,also the strength performance perform best when samples prepared by process 2. Moreover,the compressive strength and splitting tensile strength of RPC are respectively 37. 9% and 18. 6% higher than those without fiber addition. Furthermore,extending mixing time can further improve the dispersion of fibers,but after a period of time,the dispersion performance of fibers begins to decline.In addition,the damage form of samples also reflects the dispersion of fibers. The more evenly the fibers disperse,the better integrity of samples are.

引文

[1]张松涛,贾欣悦,宋卓,等.无砂再生透水混凝土配合比设计[J].混凝土与水泥制品,2016(12):6-12.
    [2]陈守开,刘新飞,郭磊,等.再生骨料掺配比对再生透水混凝土性能的影响[J].复合材料学报,2018,35(6):1591-1592.
    [3]刘肖凡,李继祥.刚性纤维增强透水混凝土配合比的试验研究[J].河北工业大学学报,2015,44(6):104-107.
    [4]李长风,刘加平,刘建忠,等.纤维增强混凝土中纤维分布表征及调控的研究进展[J].混凝土,2014(7):108-112.
    [5]Torrents P A,Masonj M,Shahs P,et al.Electrical impedance spectra to monitor damage during tensile loading of cement composites[J].ACI Materials Journal,2001,98(4):313-322.
    [6]Wansom S,Janjaturaphan S.Evaluation of fiber orientation in plant fiber-cement composites using AC-impedance spectroscopy[J].Cement and Concrete Research,2013,45:37-44.
    [7]Liu J P,Li C F,Liu J Z,et al.Study on 3D spatial distribution of steel fibers in fiber reinforced cementitious composites through micro-CT technique[J].Construction and Building Materials,2013,48:656-661.
    [8]张倩倩,刘建忠,周华新,等.超高性能混凝土流变特性及其对纤维分散性的影响[J].材料导报A:综述篇,2017,31(12):73-74.
    [9]宣卫红,赵晖,陈育志,等.聚丙烯纤维的长度对新拌砂浆工作性能的影响及机理分析[J].混凝土,2012(12):110-112.
    [10]曹明莉,许玲,李志文.聚乙烯醇纤维及钢纤维增强水泥砂浆流变性和流动性能[J].建筑材料学报,2017,20(1):113-116.
    [11]龚爱民,孙海燕,彭玉林.聚丙烯纤维对新拌混凝土性能的影响[J].建筑材料学报,2007,10(4):489-492.
    [12]王丽丹,周志云,叶林飞,等.复合微粉和聚丙烯纤维对再生混凝土抗冻性研究[J].上海理工大学学报,2017,39(3):301-305.
    [13]刘建忠,张丽辉,李长风,等.聚乙烯醇纤维在水泥基复合材料中的分散性表征及调控[J].硅酸盐学报,2015,43(8):1064-1065.
    [14]杨元霞,毛起炻,沈大荣,等.碳纤维水泥基复合材料中纤维分散性的研究[J].建筑材料学报,2001,4(1):84-88.
    [15]梁宁慧,杨鹏,刘新荣,等.高应变率下多尺寸聚丙烯纤维混凝土动态压缩力学性能研究[J].材料导报B:研究篇,2018,32(1):288-294.