玄武岩-粗聚丙烯纤维干硬性混凝土拉压性能试验研究

摘要/Abstract

摘要： 混杂纤维增强干硬性混凝土在国内外已有广泛的应用,纤维配比是影响其拉压性能的主要因素之一。为研究玄武岩纤维与粗聚丙烯纤维配比对干硬性混凝土拉压性能的影响,将玄武岩纤维与粗聚丙烯纤维单掺或按不同比例混合掺入干硬性混凝土中,开展不同养护龄期下纤维混凝土的抗压、劈裂抗拉试验,分析纤维混杂增强效应,并基于成熟度理论修正养护龄期,优化玄武岩-粗聚丙烯纤维干硬性混凝土的劈裂抗拉强度预测模型。结果表明:玄武岩纤维与粗聚丙烯纤维的掺入不仅提升了干硬性混凝土抗压、劈裂抗拉性能,而且纤维的桥接作用能明显改善混凝土的脆性破坏特征,其中玄武岩纤维与粗聚丙烯纤维混掺配比为1 ∶2(质量比)时最为明显,表现出了最优的纤维混杂正效应。根据等效龄期-抗压强度关系式计算得到的混凝土抗压强度与劈裂抗拉强度具有更好的幂函数关系,该模型便于计算及预测不同养护温度条件下玄武岩-粗聚丙烯纤维干硬性混凝土的拉压性能。

关键词: 干硬性混凝土, 玄武岩纤维, 粗聚丙烯纤维, 抗压强度, 劈裂抗拉强度, 成熟度理论

Abstract: Hybrid fiber reinforced roller compacted concrete has been widely used at home and abroad, the ratio of fiber content is one of the main factors affecting its tensile and compression properties. To study the effect of the mix proportion of basalt fiber and coarse polypropylene fiber on the tensile and compression properties of roller compacted concrete, basalt fiber and coarse polypropylene fiber were single doped or hybrid with different proportions into roller compacted concrete. The compressive and splitting tensile tests of fiber reinforced concrete at different curing ages were carried out, the hybrid reinforcing effect of basalt fiber and coarse polypropylene fiber were analyzed. The curing ages were modified based on the maturity theory, and the splitting tensile strength prediction model of basalt-coarse polypropylene fiber roller compacted concrete was optimized. The incorporation of basalt fiber and coarse polypropylene fiber not only improves the compressive and tensile properties of roller compacted concrete, but also optimizes the brittle failure characteristics and improves the toughness of concrete specimens due to the bridging effect of fibers, especially when the mass mixing proportion of basalt fiber and coarse polypropylene fiber is 1 ∶2, which shows the optimal positive fiber hybridization effect. The compressive strength calculated by the equivalent curing age-compressive strength equation has a better power function relationship with the splitting tensile strength, and the model is convenient to calculate and predict the compressive and tensile properties of basalt-coarse polypropylene fiber reinforced roller compacted concrete at different curing temperatures.

Key words: roller compacted concrete, basalt fiber, coarse polypropylene fiber, compressive strength, splitting tensile strength, maturity theory

中图分类号:

TU528.572

梁宁慧, 毛金旺, 刘新荣, 许益华, 周侃. 玄武岩-粗聚丙烯纤维干硬性混凝土拉压性能试验研究[J]. 硅酸盐通报, 2022, 41(6): 1946-1954.

LIANG Ninghui, MAO Jinwang, LIU Xinrong, XU Yihua, ZHOU Kan. Tensile and Compression Properties of Basalt-Coarse Polypropylene Fiber Reinforced Roller Compacted Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(6): 1946-1954.

参考文献

[1] 白亚飞,王栋民.公路混凝土用低坍落度塑性混凝土和无坍落度干硬性混凝土用引气剂的国内外研究进展[J].材料导报,2020,34(7):7099-7106.
BAI Y F, WANG D M. Domestic and foreign research progress of air-entraining agents for low-slump of plastic concrete and no-slump of dry-hard concrete used in highway concrete[J]. Materials Reports, 2020, 34(7): 7099-7106 (in Chinese).
[2] 权磊,田波,李思李,等.机场道面高频振捣密实混凝土弯曲疲劳性能演化特征[J].交通运输工程学报,2020,20(2):34-45.
QUAN L, TIAN B, LI S L, et al. Evolution characteristics of flexural fatigue performance of dense concrete consolidated with high frequency vibration applied in airport pavement[J]. Journal of Traffic and Transportation Engineering, 2020, 20(2): 34-45 (in Chinese).
[3] YILDIZEL S A, TIMUR O, OZTURK A U. Abrasion resistance and mechanical properties of waste-glass-fiber-reinforced roller-compacted concrete[J]. Mechanics of Composite Materials, 2018, 54(2): 251-256.
[4] JIA Y, TANG L, XU B H, et al. Crack detection in concrete parts using vibrothermography[J]. Journal of Nondestructive Evaluation, 2019, 38(1): 1-11.
[5] 张松榆.半干硬性钢纤维陶粒混凝土性能研究[J].哈尔滨建筑工程学院学报,1994(5):64-68.
ZHANG S Y. Study of properties of steel fibre reinforced ceramisite dry concrete[J]. Journal of Harbin University of Civil Engineering and Architecture, 1994(5): 64-68 (in Chinese).
[6] 郑京彪,孙家瑛,胡斌逸.路用钢纤维碾压混凝土物理力学性能研究及应用[J].混凝土,2002(8):26-28.
ZHENG J B, SUN J Y, HU B Y. Study and application on mechanical-physical properties of pavement steel fiber roller compacted concrete[J]. Concrete, 2002(8): 26-28 (in Chinese).
[7] 牟小波.隧道路面碾压混凝土的高性能化[D].沈阳:沈阳建筑大学,2011:51-55.
MU X B. Study on the high performance of roller compacted concrete used for tunnel pavement[D].Shenyang: Shenyang Jianzhu University, 2011: 51-55 (in Chinese).
[8] NANNI A, JOHARI A. RCC pavement reinforced with steel fibers[J]. Concrete International, 1989, 11(3): 64-69.
[9] GRAEFF A G, PILAKOUTAS K, NEOCLEOUS K, et al. Fatigue resistance and cracking mechanism of concrete pavements reinforced with recycled steel fibres recovered from post-consumer tyres[J]. Engineering Structures, 2012, 45: 385-395.
[10] LAHUCIK J, DAHAL S, ROESLER J, et al. Mechanical properties of roller-compacted concrete with macro-fibers[J]. Construction and Building Materials, 2017, 135: 440-446.
[11] 宋英杰.耐碱玻璃纤维干硬性混凝土的力学性能试验研究[D].哈尔滨:哈尔滨工业大学,2016:56-68.
SONG Y J. The mechanical properties of alkali-resistant glass-fiber-reinforced dry concrete[D]. Harbin: Harbin Institute of Technology, 2016: 56-68 (in Chinese).
[12] 许飞,王兵,宋鲁光.聚丙烯纤维对干硬性再生混凝土性能影响试验研究[J].扬州职业大学学报,2018,22(3):27-29+37.
XU F, WANG B, SONG L G. Experimental study on the effect of polypropylene fiber on properties of stiff recycled concrete[J]. Journal of Yangzhou Polytechnic College, 2018, 22(3): 27-29+37 (in Chinese).
[13] 张学元,吕春,张道明,等.稻草纤维在轻骨料混凝土中的增韧性能及劈裂抗拉强度预测模型[J].材料导报,2020,34(2):2034-2038.
ZHANG X Y, LYU C, ZHANG D M, et al. Performance of increasing toughness of straw fiber in lightweight aggregate concrete and its prediction model of splitting tensile strength[J]. Materials Reports, 2020, 34(2): 2034-2038 (in Chinese).
[14] 陈萌,刘立新,彭少民.预拌混凝土各龄期抗拉和抗压强度换算关系试验研究[J].建筑结构,2010,40(2):109-111.
CHEN M, LIU L X, PENG S M. Experimental study on relationships between tensile strength and compressive strength of ready-mixed concrete at different age[J]. Building Structure, 2010, 40(2): 109-111 (in Chinese).
[15] 邓志云.纤维混凝土管力学特性及其在长距离岩石顶管裂缝控制中的应用研究[D].重庆:重庆大学,2020:42-60.
DENG Z Y. Mechanical properties of fiber-reinforced concrete pipe and its application in crack control of long-distance rock pipe jacking[D]. Chongqing: Chongqing University, 2020: 42-60 (in Chinese).
[16] LIANG N H, REN L X, TIAN S, et al. Study on the fracture toughness of polypropylene-basalt fiber-reinforced concrete[J]. International Journal of Concrete Structures and Materials, 2021, 15: 35.
[17] LIANG N H, YOU X F, YAN R, et al. Experimental investigation on the mechanical properties of polypropylene hybrid fiber-reinforced roller-compacted concrete pavements[J]. International Journal of Concrete Structures and Materials, 2022, 16(1): 1-14.
[18] 刘曙光,郑德路,闫长旺,等.聚乙烯醇纤维水泥基复合材料拉压比试验研究[J].土木建筑与环境工程,2013,35(s1):134-138.
LIU S G, ZHENG D L, YAN C W, et al. Experimental study of ratio between splitting tensile strength and compressive strength for PVA fiber cementitious composites[J]. Journal of Civil, Architectural & Environmental Engineering, 2013, 35(s1): 134-138 (in Chinese).
[19] 王成启,吴科如.不同几何尺寸纤维混杂混凝土的混杂效应[J].建筑材料学报,2005,8(3):250-255.
WANG C Q, WU K R. Research on the hybrid effect of different geometrical size hybrid fiber reinforced concrete[J]. Journal of Building Materials, 2005, 8(3): 250-255 (in Chinese).
[20] HANSEN P F, PEDERSEN J. Maturity computer for controlled curing and hardening of concrete[J]. Nordisk Betong, 1977(1): 21-25.