PP/PVA纤维增强硫铝酸盐水泥基快速修补材料试验研究

摘要/Abstract

摘要： 针对交通压力增大,公路桥梁路面易出现疲劳破坏的问题,提出以聚丙烯(PP)纤维与聚乙烯醇(PVA)纤维提升硫铝酸盐水泥基快速修补材料性能。分别探究了PP纤维与PVA纤维单掺及复掺对硫铝酸盐水泥基快速修补材料流动度、强度以及韧性的影响,并进一步研究了最优复掺比例对修补材料粘结强度及体积稳定性的影响。结果表明:单掺PP纤维对修补材料砂浆流动度影响较小,并且能显著提升抗折强度,掺入0.2%(体积分数,下同)的PP纤维流动度仅下降4%,1 d和28 d抗折强度分别达到了12.8 MPa、15.5 MPa。单掺PVA纤维会大幅减小修补材料砂浆流动度,提升抗压强度,掺入0.2%的PVA纤维流动度下降21%,1 d和28 d抗压强度分别达到了56.6 MPa、84.3 MPa。当PP和PVA纤维按3:1的比例,以0.2%的总体积掺量进行复掺时,两种纤维可以发挥协同作用使修补材料不仅可以获得良好的流动性能、强度与韧性,同时获得较好粘结强度与体积稳定性。28 d时修补材料砂浆的粘结强度达到5.6 MPa,干燥收缩率低至2.73×10^-4,可以更好地满足公路桥梁路面、伸缩缝的快速修补需求。

关键词: 快速修补材料, PP纤维, PVA纤维, 硫铝酸盐水泥, 粘结性能, 干燥收缩

Abstract: With the increase of traffic pressure, the road surface of highways and bridges is prone to fatigue failure. In this paper, polypropylene (PP) fiber and polyvinyl alcohol (PVA) fiber are used to improve the properties of sulphoaluminate cement-based rapid repair material. The effects of single and compound PP and PVA fibers on fluidity, strength and toughness of sulphoaluminate cement-based rapid repair materials were investigated, and the effects of the optimal mixing ratio on the bonding strength and volume stability of the repair materials were also studied. The results show that the single PP fiber has little effect on the fluidity of mortar, and significantly improves the flexural strength. After adding 0.2% (volume fraction, the same below) PP fiber, the fluidity only decreases by 4%, and the 1 d and 28 d flexural strengths reach 12.8 MPa and 15.5 MPa, respectively. The single addition of PVA fiber significantly reduces the fluidity of mortar repair materials and enhances the compressive strength. The fluidity of mortar decreases by 21% with the addition of 0.2% PVA fiber, and the 1 d and 28 d compressive strength reach 56.6 MPa and 84.3 MPa, respectively. When the ratio of PP and PVA fibers is 3:1 and the total volume content is 0.2%, the two kinds of fibers play a synergistic role to make the quick repair material not only obtains good flow performance, strength, and toughness, but also improves the bonding performance and shrinkage characteristics of mortar. At 28 d, the mortar bonding strength reaches 5.6 MPa, and the drying shrinkage rate is 2.73×10^-4, which better meets the rapid repair needs of highways and bridges pavement and expansion joints.

Key words: rapid repair material, PP fiber, PVA fiber, sulphoaluminate cement, bonding performance, drying shrinkage

中图分类号:

TU528.31

张成龙, 刘漪, 张明. PP/PVA纤维增强硫铝酸盐水泥基快速修补材料试验研究[J]. 硅酸盐通报, 2021, 40(7): 2174-2183.

ZHANG Chenglong, LIU Yi, ZHANG Ming. PP/PVA Fiber Reinforced Sulphoaluminate Cement-Based Rapid Repair Material[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(7): 2174-2183.

参考文献

[1] 韩亚芳,曾平安,陈照威,等.水泥混凝土路面裂缝快速修补材料的研究[J].广东土木与建筑,2020,27(1):59-63.
HAN Y F, ZENG P A, CHEN Z W, et al. Study on quick repair materials for cracks in cement concrete pavement[J]. Guangdong Architecture Civil Engineering, 2020, 27(1): 59-63 (in Chinese).
[2] DING Y, ZHANG W, AU F T K. Effect of dynamic impact at modular bridge expansion joints on bridge design[J]. Engineering Structures, 2016, 127: 645-662.
[3] KIM C W, KAWATANI M, HWANG W S. Reduction of traffic-induced vibration of two-girder steel bridge seated on elastomeric bearings[J]. Engineering Structures, 2004, 26(14): 2185-2195.
[4] 胡曙光,高达,丁庆军,等.水泥-沥青-环氧树脂复合胶结道路快速修补材料研究[J].混凝土,2019(4):155-159.
HU S G, GAO D, DING Q J, et al. Study on rapid-road-repairm aterial of cement-asphalt-epoxy[J]. Concrete, 2019(4): 155-159 (in Chinese).
[5] 彭艳周,肖蓟,詹槟赫,等.磷渣基快速修补材料的制备及其混凝土性能[J].混凝土,2017(11):173-177.
PENG Y Z, XIAO J, ZHAN B H, et al. Preparation of phosphorous slag-based rapid repairing materials and properties of its concrete[J]. Concrete, 2017(11): 173-177 (in Chinese).
[6] 于俊楠.负温环境下路面快速修补用碱激发矿渣ECC性能研究[D].哈尔滨:哈尔滨工业大学,2020.
YU J N. Study on the performance of alkali-activated slag ECC for rapid pavement repair at negative temperture[D]. Harbin: Harbin Institute of Technology, 2020 (in Chinese).
[7] 肖雪军,李宇,鞠宇飞.纤维增强道路修补砂浆力学性能试验研究[J].混凝土与水泥制品,2018(12):49-52.
XIAO X J, LI Y, JU Y F. Experimental study on mechanical performances of fiber reinforced repair mortar[J]. China Concrete and Cement Products, 2018(12): 49-52 (in Chinese).
[8] 余明东.聚丙烯纤维碾压混凝土抗裂性能试验研究[J].混凝土,2017(1):142-144.
YU M D. Experimental study on crack resistance of polypropylene fiber roller compacted concrete[J]. Concrete, 2017(1): 142-144 (in Chinese).
[9] 梁宁慧,田硕,许益华,等.荷载损伤后聚丙烯纤维混凝土毛细吸水性能试验[J].混凝土,2021(3):6-9.
LIANG N H, TIAN S, XU Y H, et al. Capillary water absorption test of polypropylene fiber concrete after load damage[J]. Concrete, 2021(3): 6-9 (in Chinese).
[10] 李文强.纤维水泥基修补材料在桥墩冲刷破坏中的应用研究[D].成都:西南交通大学,2018.
LI W Q. Study on the application of fiber cement-based repair materials in erosion of bridge piers[D]. Chengdu: Southwest Jiaotong University, 2018 (in Chinese).
[11] 代晓妮.掺聚丙烯纤维的水泥混凝土路面薄层快速修补材料性能研究[D].长沙:中南大学,2009.
DAI X N. Study on properties of cement concrete pavement thin layer rapid repair material mixed with polypropylene fiber[D]. Changsha: Central South University, 2009 (in Chinese).
[12] 曹雅娴,侯慧芳,刘曙光,等.PVA纤维混凝土力学性能增长规律研究[J].混凝土与水泥制品,2021(5):56-59.
CAO Y X, HOU H F, LIU S G, et al. Study on the growth law of mechanical properties of PVA fiber concrete[J]. China Concrete and Cement Products, 2021(5): 56-59 (in Chinese).
[13] 邓新.用于水泥混凝土路面快速修补的粉煤灰基地聚合物性能研究[D].武汉:中国地质大学,2017.
DENG X. Performance study on the fly ash based geopolymer material for cement pavement rapid repair[D]. Wuhan: China University of Geosciences, 2017 (in Chinese).
[14] 郭亚栋.高温后PVA-ECC/混凝土界面粘结性能及PVA-ECC砌体加固墙的抗剪性能研究[D].天津:河北工业大学,2016.
GUO Y D. Investigation of the bond between PVA-ECC and concrete after high temperatures and the shear behaviors of brick masonry walls strengthened with PVA-ECC[D]. Tianjin: Hebei University of Technology, 2016 (in Chinese).
[15] LI Y L, LI W G, DENG D H, et al. Reinforcement effects of polyvinyl alcohol and polypropylene fibers on flexural behaviors of sulfoaluminate cement matrices[J]. Cement and Concrete Composites, 2018, 88: 139-149.
[16] 中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.水泥胶砂流动度测定方法: GB/T 2419—2005[S].北京:中国标准出版社,2005.
General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China,Standardization Administration of China. Method for determination of fluidity of cement mortar: GB/T 2419—2005[S]. Beijing: China Standards Press, 2005 (in Chinese).
[17] 国家质量技术监督局.水泥胶砂强度检验方法: GB/T 17671—1999[S].北京:中国标准出版社,1999.
State Bureau of Quality Technical Supervision. Test method for strength of cement mortar: GB/T 17671—1999[S]. Beijing: China Standards Press, 1999 (in Chinese).
[18] 中华人民共和国国家发展和改革委员会.水泥胶砂干缩试验方法: JC/T 603—2004[S].北京:中国建材工业出版社,2005.
National Development and Reform Commission. Test method for dry shrinkage of cement mortar: JC/T 603—2004[S]. Beijing: China Building Materials Industry Press, 2005 (in Chinese).
[19] 孙子豪,赵美程,饶美娟,等.蒸养纤维掺杂高铁低钙水泥混凝土的抗海水冲磨性能研究[J].硅酸盐通报,2019,38(7):2176-2182.
SUN Z H, ZHAO M C, RAO M J, et al. Abrasion resistance performance to seawater of steamed fiber-doped high-ferrite low-calcium cement concrete[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(7): 2176-2182 (in Chinese).
[20] 熊志卿,欧忠文,王经纬,等.多尺度混杂PVA纤维对喷射超高韧性水泥基复合材料流动性及力学性能的影响[J].混凝土,2018(11):71-73+77.
XIONG Z Q, OU Z W, WANG J W, et al. Influence of hybrid PVA fibers on the fluidity and mechanical properties of sprayed ultra high toughness cementitious composites[J]. Concrete, 2018(11): 71-73+77 (in Chinese).
[21] GUPTA S, KUA H W, TAN CYNTHIA S Y. Use of biochar-coated polypropylene fibers for carbon sequestration and physical improvement of mortar[J]. Cement and Concrete Composites, 2017, 83: 171-187.
[22] 周学军,咸国栋,王振,等.高强度低导热泡沫混凝土性能研究[J].硅酸盐通报,2021,40(4):1186-1192.
ZHOU X J, XIAN G D, WANG Z, et al. Performance of high strength and low thermal conductivity foamed concrete[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(4): 1186-1192 (in Chinese).
[23] 姚文杰,庞建勇,姚韦靖.聚丙烯纤维喷射混凝土力学性能试验研究[J].混凝土与水泥制品,2016(4):60-62.
YAO W J, PANG J Y, YAO W J. Experimental study on mechanical properties of shotcrete with polypropylene fiber[J]. China Concrete and Cement Products, 2016(4): 60-62 (in Chinese).
[24] ZHU C, ZHANG J X, PENG J H, et al. Physical and mechanical properties of gypsum-based composites reinforced with PVA and PP fibers[J]. Construction and Building Materials, 2018, 163: 695-705.
[25] YAO W, LI J, WU K R. Mechanical properties of hybrid fiber-reinforced concrete at low fiber volume fraction[J]. Cement and Concrete Research, 2003, 33(1): 27-30.
[26] NOUSHINI A, VESSALAS K, SAMALI B. Static mechanical properties of polyvinyl alcohol fibre reinforced concrete (PVA-FRC)[J]. Magazine of Concrete Research, 2014, 66(9): 465-483.
[27] 张正,张勤,刘荣浩,等.不同尺度纤维复合增强高性能细骨料混凝土力学性能试验研究[J].建筑结构,2020,50(22):77-82+61.
ZHANG Z, ZHANG Q, LIU R H, et al. Experimental study on mechanical properties of high-performance fine aggregate concrete composite reinforced by fiber at different scales[J]. Building Structure, 2020, 50(22): 77-82+61 (in Chinese).
[28] 王彦平,陈昶旭,张戎令,等.PVA纤维增强水泥基修补砂浆冲蚀磨损性能试验研究[J].硅酸盐通报,2019,38(12):3752-3758.
WANG Y P, CHEN C X, ZHANG R L, et al. Experimental study on erosion wear properties of PVA fiber reinforced cement matrix mortar[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(12): 3752-3758 (in Chinese).
[29] 余保英,周建伟,孔亚宁,等.PVA纤维长度对超高韧性水泥基复合材料力学性能的影响[J].硅酸盐通报,2020,39(11):3425-3431.
YU B Y, ZHOU J W, KONG Y N, et al. Effect of PVA fiber length on mechanical properties of ultra-high toughness cementitious composites[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(11): 3425-3431 (in Chinese).
[30] MASTALI M, KINNUNEN P, ISOMOISIO H, et al. Mechanical and acoustic properties of fiber-reinforced alkali-activated slag foam concretes containing lightweight structural aggregates[J]. Construction and Building Materials, 2018, 187: 371-381.
[31] 薛刚,林大地.橡胶混凝土低温抗折性能试验研究[J].西安建筑科技大学学报(自然科学版),2019,51(5):623-628.
XUE G, LIN D D. Experimental study on flexural behavior of rubber concrete at low temperature[J]. Journal of Xi’an University of Architecture & Technology (Natural Science Edition), 2019, 51(5): 623-628 (in Chinese).
[32] 唐佳军,李九阳,王坦.改性混凝土的拉压比与折压比分析[J].工程建设,2020,52(12):12-16.
TANG J J, LI J Y, WANG T. Analysis on tension-compression ratio and compression-flexure ratio of latex-modified concrete[J]. Engineering Construction, 2020, 52(12): 12-16 (in Chinese).
[33] LUO J L, LI Q Y, ZHAO T J, et al. Bonding and toughness properties of PVA fibre reinforced aqueous epoxy resin cement repair mortar[J]. Construction and Building Materials, 2013, 49: 766-771.
[34] LUO J L, DUAN Z, XIAN G, et al. Fabrication and fracture toughness properties of carbon nanotube-reinforced cement composite[J]. The European Physical Journal Applied Physics, 2011, 53(3): 30402.
[35] CHUNG K L, GHANNAM M, ZHANG C W. Effect of specimen shapes on compressive strength of engineered cementitious composites (ECCs) with different values of water-to-binder ratio and PVA fiber[J]. Arabian Journal for Science and Engineering, 2018, 43(4): 1825-1837.
[36] MOUSAVI S M, RANJBAR M M, MADANDOUST R. Combined effects of steel fibers and water to cementitious materials ratio on the fracture behavior and brittleness of high strength concrete[J]. Engineering Fracture Mechanics, 2019, 216: 106517.
[37] ZANOTTI C, BANTHIA N, PLIZZARI G. A study of some factors affecting bond in cementitious fiber reinforced repairs[J]. Cement and Concrete Research, 2014, 63: 117-126.
[38] WANG J Q, DAI Q L, SI R Z, et al. Investigation of properties and performances of polyvinyl alcohol (PVA) fiber-reinforced rubber concrete[J]. Construction and Building Materials, 2018, 193: 631-642.