回收轮胎聚合物纤维混凝土干缩性能研究

doi:10.12068/j.issn.1005-3026.2023.01.017

摘要/Abstract

摘要： 为研究回收轮胎聚合物纤维(RTPF)对混凝土干缩性能的影响，对素混凝土、RTPF混凝土(体积分数分别为0.1%，0.2%，0.4%和0.8%)和聚丙烯纤维(PPF)混凝土(体积分数为0.1%)进行干缩试验和纤维作用机理分析.结果表明:不同掺量RTPF混凝土比素混凝土坍落度降低8.1%~62.2%，含气量增大11.2%~47.9%；RTPF混凝土的干缩率在0~7d时增长速率较快，之后逐渐平缓，RTPF的加入降低了混凝土干缩的早期增长速率；混凝土干缩率随RTPF掺量的增加出现先降低后升高的趋势，当RTPF体积分数为0.2%时混凝土干缩率出现最小值，不同掺量RTPF混凝土在7d和28d时的干缩率分别比素混凝土降低了14.2%~36.0%和2.9%~27.2%；相同体积分数(0.1%)下PPF混凝土的干缩率比RTPF混凝土低，在抑制混凝土干缩方面体积掺量0.2%的RTPF可替代体积掺量0.1%的PPF；扫描电子显微镜测试表明，RTPF可与混凝土基体有效黏结，并承担来自混凝土基体的收缩应力；通过干缩率的拟合值与实测值对比得到适合RTPF混凝土的干缩计算模型.

关键词: 纤维混凝土；回收轮胎聚合物纤维(RTPF)；干缩；扫描电子显微镜；计算模型

Abstract: To investigate the effect of recycled tyre polymer fiber (RTPF) on the drying shrinkage properties of concrete， dry shrinkage tests and analysis of the mechanism of fiber action were carried out on plain concrete， RTPF (volume fraction is 0.1%， 0.2%， 0.4% and 0.8%，respectively) concrete and 0.1%polypropylene fiber (PPF) concrete. Results indicated that the slump of RTPF concrete with different contents decreases by 8.1%~62.2%， and the air fraction increases by 11.2%~47.9% as compared with plain concrete. The drying shrinkage rate of RTPF concrete increases rapidly at 0~7d and then tends to be stabilized. The addition of RTPF reduces the early growth rate of the drying shrinkage of concrete. The drying shrinkage rate of concrete decreases initially and then increases with the increase of RTPF content. When the volume fraction of RTPF is 0.2%， the concrete shows the minimum drying shrinkage rate. The drying shrinkage rates of RTPF concrete with different contents at 7d and 28d are 14.2%~36.0% and 2.9%~27.2%， respectively， which are lower than those of plain concrete. The drying shrinkage rate of PPF concrete is lower than that of RTPF concrete at the same volume fraction (0.1%). In terms of the inhibiting concrete drying shrinkage， RTPF with a volume fraction of 0.2% could replace PPF with a volume fraction of 0.1%. The scanning electron microscope showed that RTPF could bond well with the concrete matrix and transfers the shrinkage stress of the concrete matrix. Finally， by comparing the test data and fitting value of drying shrinkage rate， a drying shrinkage calculation model suitable for RTPF concrete was obtained.

Key words: fiber reinforced concrete; recycled tyre polymer fiber (RTPF); drying shrinkage; scanning electron microscope; calculation model

中图分类号:

TP528.572

陈猛，王瑜婷，曹宇新. 回收轮胎聚合物纤维混凝土干缩性能研究[J]. 东北大学学报（自然科学版）, 2023, 44(1): 123-129.

CHEN Meng， WANG Yu-ting， CAO Yu-xin. Study on Drying Shrinkage of Recycled Tyre Polymer Fiber Reinforced Concrete[J]. Journal of Northeastern University(Natural Science), 2023, 44(1): 123-129.

参考文献

[1]Baricevic A，Pezer M，Rukavina M J，et al.Effect of polymer fibers recycled from waste tires on properties of wet-sprayed concrete［J］.Construction and Building Materials，2018，176: 135-144.
[2]Chen M，Zhong H，Zhang M Z.Flexural fatigue behaviour of recycled tyre polymer fibre reinforced concrete［J］.Cement and Concrete Composites，2020，105: 103441.
[3]Chen M，Sun Z H，Tu W，et al.Behaviour of recycled tyre polymer fibre reinforced concrete at elevated temperatures［J］.Cement and Concrete Composites，2021，124: 104257.
[4]Baricevic A，Rukavina J M，Pezer M，et al.Influence of recycled tire polymer fibers on concrete properties［J］.Cement and Concrete Composites，2018，91:29-41.
[5]Serdar M，Baricevic A，Marija J R，et al.Shrinkage behaviour of fibre reinforced concrete with recycled tyre polymer fibers［J］.International Journal of Polymer Science，2015，2015:145918.
[6]Afroughsabet V，Biolzi L，Monteiro P J M.The effect of steel and polypropylene fibers on the chloride diffusivity and drying shrinkage of high-strength concrete［J］.Composites Part B: Engineering，2018，139: 84-96.
[7]Yousefieh N，Joshaghani A，Hajibandeh E，et al.Influence of fibers on drying shrinkage in restrained concrete［J］.Construction and Building Materials，2017，148: 833-845.
[8]Saje D，Bandelj B，Sustersic J，et al.Autogenous and drying shrinkage of fibre reinforced high-performance concrete［J］.Journal of Advanced Concrete Technology，2012，10: 59-73.
[9]Banthia N，Gupta R.Influence of polypropylene fiber geometry on plastic shrinkage cracking in concrete［J］.Cement and Concrete Research，2006，36: 1263-1267.
[10]Sun Z，Xu Q.Microscopic，physical and mechanical analysis of polypropylene fiber reinforced concrete［J］.Materials Science and Engineering A，2009，527(1):198-204.
[11]中国国家标准化管理委员会.普通混凝土拌合物性能试验方法标准:GB/T50080—2016［S］.北京:中国建筑工业出版社，2016.(Standardization Administration of the People’s Republic of China.Standard for test method of performance on ordinary fresh concrete:GB/T 50080—2016［S］.Beijing:China Architecture and Building Press，2016.)
[12]中国国家标准化管理委员会.公路工程水泥及水泥混凝土试验规程:JTG E30—2005［S］.北京:中国建筑工业出版社，2005.(Standardization Administration of the People’s Republic of China.Testing methods of cement and concrete for highway engineering:JTG E30—2005［S］.Beijing:China Architecture and Building Press，2005.)
[13]Alwesabi E，Bakar B，Alshaikh I，et al.Experimental investigation on mechanical properties of plain and rubberised concretes with steel-polypropylene hybrid fibre［J］.Construction and Building Materials，2020，233: 117194.
[14]Li L J，Ruan S H，Zeng L.Mechanical properties and constitutive equations of concrete containing a low volume of tire rubber particles［J］.Construction and Building Materials，2014，70:291-308.
[15]Wang Q，Wang Y Y，Geng Y，et al.Experimental study and prediction model for autogenous shrinkage of recycled aggregate concrete with recycled coarse aggregate［J］.Construction and Building Materials，2021，268: 121197.
[16]Zhong H，Zhang M Z.Experimental study on engineering properties of concrete reinforced with hybrid recycled tyre steel and polypropylene fibres［J］.Journal of Cleaner Production，2020，259: 120914.
[17]Chen M，Zhong H，Chen L，et al.Engineering properties and sustainability assessment of recycled fibre reinforced rubberised cementitious composite［J］.Journal of Cleaner Production，2021，278: 123996.
[18]Tang S，Huang D，He Z.A review of autogenous shrinkage models of concrete［J］.Journal of Building Engineering，2021，44: 103412.
[19]Tran N，Gunasekara C，Law D，et al.A critical review on drying shrinkage mitigation strategies in cement-based materials［J］.Journal of Building Engineering，2021，38: 102210.
[20]徐世烺，刘志凤.超高韧性水泥基复合材料干缩性能及其对抗裂能力的影响［J］.水利学报，2010，41(12):1491-1496.(Xu Shi-lang，Liu Zhi-feng.The effect of ultra-high toughness cementitious composites on drying shrinkage properties crack resistance［J］.Journal of Hydraulic Engineering，2010，41(12):1491-1496.)(上接第122页)(Yan Yu-zhou，Wang Jie，Ye Xiao-chun，et al.Preparation of NaOH modified lotus stem biochar and its adsorption characteristics for phenol［J］.Journal of Wuhan University of Technology (Information and Management Engineering Edition)，2021，43 (3):224-230.)
[6]张宁坤，李潇川，梁嘉莉，等.荷梗生物炭吸附突发苯酚污染研究［J］.武汉理工大学学报(信息与管理工程版)，2021，43(4):302-308.(Zhang Ning-kun，Li Xiao-chuan，Liang Jia-li，et al.Study on the sudden phenol pollution of lotus stem biochar adsorption［J］.Journal of Wuhan University of Technology (Information and Management Engineering Edition)，2021，43 (4):302-308.)
[7]Teixidó M，Pignatello J J，Beltrán J L，et al.Speciation of the ionizable antibiotic sulfamethazine on black carbon(biochar)［J］.Environmental Science & Technology，2011，45(23):10020-10027.
[8]陈玲，林珍义，肖瑶，等.氟代六元氮杂环化合物与水分子弱相互作用的理论研究［J］.西华大学学报(自然科学版)，2021，40(3):98-104.(Chen Ling，Lin Zhen-yi，Xiao Yao，et al.Theoretical study on the weak interaction between fluorinated six-membered nitrogen heterocyclic compounds and water molecules［J］.Journal of Xihua University (Natural Science Edition)，2021，40(3):98-104.)
[9]Frisch M J，Trucks G W，Schlegel H B，et al.Gaussian 09，Revision D.O1［Z］.Gaussian Inc，Wallingford CT，2013.
[10]Lu T，Chen F.Multiwfn: a multifunctional wavefunction analyzer［J］.Journal of Computational Chemistry，2012，33(5):580-592.
[11]Payne G F，Payne N N，Ninomiya Y，et al.Adsorption of non polar solutes onto neutral polymer sorbents［J］.Separation Science and Technology，1989，24: 457-465.
[12]Payne G F，Ninomiya Y.Selective adsorption of solutes based on hydrogen bonding［J］.Separation Science and Technology，1990，25: 1117-1129.
[13]王庆文，杨玉恒，高鸿宾.有机化学中的氢键问题［M］.天津: 天津大学出版社，1993: 1-243.(Wang Qing-wen，Yang Yu-heng，Gao Hong-bin.The hydrogen bond problem in organic chemistry［M］.Tianjin: Tianjin University Press，1993: 1-243.)
[14]Muhammad S U R，Kim I，Rashid N，et al.Adsorption of brilliant green dye on biochar prepared from lignocellulosic bioethanol plant waste［J］.Clean-Soil Air Water，2016，44(1):55-62.
[15]Qu Z B，Sun F，Liu X，et al.The effect of nitrogen-containing functional groups on SO₂ adsorption on carbon surface:enhanced physical adsorption interactions［J］.Surface Science，2018，677: 78-82.
[16]Xu H，Chu W，Huang X，et al.CO₂ adsorption-assisted CH₄ desorption on carbon models of coal surface: a DFT study［J］.Applied Surface Science，2016，375: 196-206.
[17]Carroll M T，Bader R F.An analysis of the hydrogen bond in BASE-HF complexes using the theory of atoms in molecules［J］.Molecular Physics，1988，65(3):695-722.
[18]Espinosa E，Alkorta I，Elguero J，et al.From weak to strong interactions: a comprehensive analysis of the topological and energetic properties of the electron density distribution involving X-H，…，F-Y systems［J］.The Journal of Chemical Physics，2002，117(12):5529-5542.
[19]Alabugin I V，Manoharan M，Peabody S，et al.Electronic basis of improper hydrogen bonding: a subtle balance of hyperconjugation and rehybridization［J］.Journal of the American Chemical Society，2003，125(19):5973-5987.
[20]Rozas I，Alkorta I，Elguero J.Behavior of ylides containing N，O，and C atoms as hydrogen bond acceptors［J］.Journal of the American Chemical Society，2000，122: 11154-11161.