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(1 西南科技大學(xué)土木工程與建筑學(xué)院, 綿陽(yáng) 621010; 2 中冶建筑研究總院有限公司, 北京 100088;3 西安交通大學(xué)人居環(huán)境與建筑工程學(xué)院, 西安 710049)

摘要: 選取不同纖維長(zhǎng)度、不同尺度(單一或多種長(zhǎng)度混合)、摻量、摻入方式、分散劑作為影響因素進(jìn)行纖維分散性試驗(yàn)研究,運(yùn)用圖像法及水洗法分別對(duì)聚乙烯醇(PVA)纖維在水中和水泥砂漿中分散性能進(jìn)行研究,探討各因素對(duì) PVA 纖維分散性影響規(guī)律及提高纖維分散性的調(diào)控方法. 結(jié)果表明:PVA 纖維長(zhǎng)度為 8mm 時(shí),分散性能最好;相同摻量時(shí),多種長(zhǎng)度混合纖維的分散性不如單尺度纖維分散性;分散劑對(duì) PVA 纖維在水中分散性影響較小;在水泥砂漿中,纖維摻量越少、長(zhǎng)度越短,纖維分散性越好.

關(guān)鍵詞: 纖維混凝土; 圖像法; 水洗法; 聚乙烯醇纖維; 分散性

中圖分類號(hào):TU528. 58 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)12-0091-07

DOI:10. 19701 / j. jzjg. 20201812

Experimental study on dispersibility of polyvinyl alcohol fiber in fiber concrete

LI Jiaxing1,2, YANG Yongxin2, JIA Bin1, HUANG Hui1, ZHAO Jinjie2,LI Wenxiao3, WANG Tao2, WU Yuhang1

(1 College of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010,China; 2 Central Research Institute of Building and Construction Co. , Ltd. MCC Group, Beijing 100088, China;3 School of Human Settlements and Civil Engineering, Xi′an Jiaotong University, Xi′an 710049, China)

Abstract: Different fiber lengths, different scales ( single or multiple lengths mixed), dosage, blending method anddispersant were selected as influencing factors to conduct fiber dispersibility test. The dispersion properties of polyvinylalcohol (PVA) fiber in water and cement mortar were studied by image method and washing method respectively. Theinfluence of various factors on the dispersibility of PVA fiber and the regulation methods to improve the dispersibility of fiberwere discussed. The results show that the dispersion properties of PVA fiber is the best when the length of PVA fiber is8mm. At the same dosage, the dispersibility of mixed fibers of multiple lengths is not as good as that of single scale fibers.Dispersant has little effect on dispersibility of PVA fiber in water. In cement mortar, the less fiber content, the shorter thelength, the better the fiber dispersibility.

Keywords:fiber concrete; image method; washing method; polyvinyl alcohol fiber; dispersibility

∗“十三五” 國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目 ( 2016YFB0303201), 國(guó)家自然科學(xué)基金項(xiàng)目 ( 51908476), 四川省科技計(jì)劃項(xiàng)目(2020JDTD0021),中冶建筑研究總院有限公司資助重大課題(YCK2017KY01).

第一作者:李家興,碩士,主要從事纖維增強(qiáng)復(fù)合材料力學(xué)性能方面的研究,Email:893842040@ qq. com.

[引用本文] 李家興,楊勇新,賈彬,等. 纖維混凝土中聚乙烯醇纖維分散性試驗(yàn)研究[ J]. 建筑結(jié)構(gòu),2023,53(12):91-97. LI Jiaxing,YANG Yongxin,JIA Bin,et al. Experimental study on dispersibility of polyvinyl alcohol fiber infiber concrete[J]. Building Structure,2023,53(12):91-97.