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（1 西安理工大學(xué)土木建筑工程學(xué)院， 西安 710048； 2 鄭州科技學(xué)院， 鄭州 454000）

［摘要］高延性纖維混凝土（HDFC）具有良好的裂縫控制能力、高強(qiáng)度和韌性。采用硫酸鹽-干濕循環(huán)試驗(yàn)方法對(duì)HDFC試件進(jìn)行了侵蝕試驗(yàn)，研究其抗侵蝕性能。試驗(yàn)對(duì)30個(gè)（10組）HDFC立方體試件進(jìn)行單軸受壓試驗(yàn)，測定不同硫酸鹽侵蝕次數(shù)后HDFC的表觀特征以及各項(xiàng)基本力學(xué)性能，包括極限承載力、峰值應(yīng)變和裂縫狀態(tài)。試驗(yàn)結(jié)果表明，經(jīng)過150次硫酸鹽侵蝕后HDFC具有良好的裂縫控制能力，試件出現(xiàn)較少的細(xì)密裂紋，表現(xiàn)出良好的抗侵蝕性能。通過分析HDFC應(yīng)力-應(yīng)變曲線，得到HDFC干濕循環(huán)本構(gòu)模型曲線，與試驗(yàn)曲線對(duì)比發(fā)現(xiàn)，本構(gòu)模型曲線與試驗(yàn)曲線較為吻合。

［關(guān)鍵詞］高延性纖維混凝土； 硫酸鹽-干濕循環(huán)； 硫酸鹽侵蝕； 本構(gòu)關(guān)系； 單軸受壓

中圖分類號(hào)：TU502+.6文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)03-0080-07

Experimental study on mechanical properties of high ductility fiber reinforced concrete under sulfate erosion

Kou Jialiang1， Lin Yadang2， Xi Fangyong1， Wen Congge2

(1 School of Civil Engineering & Architecture, Xi′an University of Technology, Xi′an 710048, China; 2 Zhengzhou Institute of Science and Technology, Zhengzhou 454000, China)

Abstract:High ductility fiber concrete (HDFC) has good crack control ability, high strength and toughness. The sulfate-dry-wet cyclic test method was used to study the corrosion resistance of HDFC specimens. Ten groups of 30 HDFC cube specimens were tested under uniaxial compression. The apparent characteristics and basic mechanical properties of HDFC after different sulfate erosion times were measured, including ultimate bearing capacity, peak strain and crack state. The test results show that HDFC has good crack control ability after 150 times of sulfate erosion, the specimens  have fewer fine cracks and  shows good corrosion resistance performance. By analyzing the stress-strain curve of HDFC, the constitutive model curve of dry-wet cycle of HDFC was obtained. Compared with the experimental curve, it is found that the constitutive model curve is in good agreement with the experimental curve.

Keywords:high ductility fiber concrete; sulfate-dry-wet cycle; sulfate erosion; constitutive relation; uniaxial compression

*國家自然科學(xué)基金資助項(xiàng)目(51408487)，中國住建部科學(xué)技術(shù)資助項(xiàng)目(2014-K2-037)，中國博士后科學(xué)基金第56批面上資助項(xiàng)目(2014M562437)，陜西省自然科學(xué)基金資助項(xiàng)目(2014JQ7292)，陜西省住房城鄉(xiāng)建設(shè)科技計(jì)劃項(xiàng)目(2016-K89)，陜西省博士后科學(xué)基金資助項(xiàng)目，西安市建設(shè)科技項(xiàng)目(SJW2015-09)。

作者簡介：寇佳亮，博士，副教授， Email: jialiangkou0918@163.com。