基于聚合物机制砂水泥混凝土路面路用性能研究
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摘要
天然河砂是一种地域强、不可再生的建筑材料,为了节省河砂,在基础设施建设过程中往往会选用机制砂代替河砂.耐久性差、脆性大是水泥混凝土路面共性缺点,机制砂取代河砂后,混凝土的耐磨性会进一步降低,很大程度上限制了机制砂水泥混凝土在道路工程中的应用.聚合物改性水泥混凝土(PCC)路面,具备较好的韧性、抗变形能力以及耐久性,为增强机制砂水泥混凝土路面的力学性能及耐磨性,选用低掺量的聚合物对机制砂水泥混凝土进行改性.选用聚丙烯酸酯乳液和羧基丁苯胶乳两种聚合物,以1%、3%、5%的聚灰比加入到机制砂水泥混凝土中,进行配合比设计及混凝土路用性能研究得出:聚合物的掺入降低了机制砂水泥混凝土的抗压强度,但混凝土的抗弯拉强度及抗磨耗能力得到了改善.
Natural river sand is a kind of regionally strong and non-renewable building material. In order to save the river sand,machine-made sand is often used to replace the river sand in the process of infrastructure construction. Poor durability and brittleness are the common shortcomings of cement concrete pavement. We find when machine-made sand replaces the river sand,the wear resistance of concrete is further reduced,which greatly limits the application of machine-made sand cement concrete in road engineering. Polymer modified cement concrete(PCC)pavement has the good toughness,deformation resistance and durability. In order to enhance the mechanical properties and wear resistance of machine-made sand cement concrete pavement,low content of polymer is selected to modify machine-made sand cement concrete. In this paper,two kinds of polymers with polyacrylate emulsion and carboxylated styrene butadiene latex were added to the machine-made sand cement concrete with 1%,3% and 5% aggregate cement ratio,and the mix proportion design and concrete pavement performance are studied. The results show that polymer incorporation reduces the compressive strength of the machine-made sand concrete,but the flexural strength and abrasion resistance of the concrete are improved.
Natural river sand is a kind of regionally strong and non-renewable building material. In order to save the river sand,machine-made sand is often used to replace the river sand in the process of infrastructure construction. Poor durability and brittleness are the common shortcomings of cement concrete pavement. We find when machine-made sand replaces the river sand,the wear resistance of concrete is further reduced,which greatly limits the application of machine-made sand cement concrete in road engineering. Polymer modified cement concrete(PCC)pavement has the good toughness,deformation resistance and durability. In order to enhance the mechanical properties and wear resistance of machine-made sand cement concrete pavement,low content of polymer is selected to modify machine-made sand cement concrete. In this paper,two kinds of polymers with polyacrylate emulsion and carboxylated styrene butadiene latex were added to the machine-made sand cement concrete with 1%,3% and 5% aggregate cement ratio,and the mix proportion design and concrete pavement performance are studied. The results show that polymer incorporation reduces the compressive strength of the machine-made sand concrete,but the flexural strength and abrasion resistance of the concrete are improved.
引文
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[20]张二芹.聚合物改性水泥混凝土的力学性能及耐久性研究[D].沈阳:沈阳工业大学,2016.
[21]王晓龙.聚合物水泥混凝土的试验研究[J].煤炭技术,2009,28(5):126-128.
[22]熊剑平.聚合物改性水泥混凝土路用性能研究[D].西安:长安大学,2005.
[23]柯国炬.路面机制砂水泥混凝土耐磨性影响因素研究[D].武汉:武汉理工大学,2010.
[2]徐大祯.高性能机制砂混凝土耐久性的研究[D].成都:西南交通大学,2013.
[3]王雨利,王卫东,周明凯,等.中低强度机制砂混凝土石粉含量确定的研究[J].土木建筑与环境工程,2012,34(5):154-158.
[4]李连生,王树林,陈小丽,等.路面机制砂混凝土泌水特性[J].辽宁省交通高等专科学校学报,2013,15(5):20-24.
[5]范晴.云南部分地区机制砂混凝土性能研究[D].重庆:重庆交通大学,2010.
[6]鄢杰.石粉含量对机制砂混凝土性能的影响研究[J].四川建材,2013,39(3):19-20.
[7]蔡基伟.石粉对机制砂混凝土性能的影响及机理研究[D].武汉:武汉理工大学,2006.
[8] AFRIDI M U K,OHAMA Y,DEMURA K,et al. A note on the comparison of crack resistance of Ca(OH)2crystals of unmodified and polymer-modified mortars in carbonated atmosphere[J]. Cem Concr Res,2001(31):1643-1651.
[9]金玉杰,康力.聚酯纤维掺量对聚合物树脂混凝土力学性能的影响[J].吉林建筑工程学院学报,2012,29(5):12-14.
[10] CAOQY,SUNW,GUOLP,etal.Polymer-modifiedconcretewithimprovedflexuraltoughnessandmechanismanalysis[J]. Journal of Wuhan University of Technology-Mater,2012,27(3):597-601.
[11]陈玲利.聚合物水泥混凝土复合材料的研究[J].武汉理工大学学报,2001,9(9):23-25.
[12] KONIETZKO A. Polymerspezifische auswirkungen auf das tragverhalten modifizierter zementgebundener betone(PCC)[D].Braunschweig:Technische Universit?t Braunschweig,1988.
[13]李劲松,王渊,王宏霞,等.混凝土结构耐久性及修复材料的研究现状[J].建筑设计管理,2010,27(3):80-82.
[14]李耀.混凝土结构修复用聚合物水泥砂浆(PCMR)的性能研究[D].长沙:湖南大学,2011.
[15]王在杭,陈潇,王稷良.新型聚合物改性水泥混凝土路用性能研究[J].新型建筑材料,2016,43(10):56-59.
[16]曾建荣,韩冰,李俊宏,等.羧基丁苯胶乳水泥浆的制备及性能研究[J].山东化工,2016,44(24):24-27.
[17]农金龙.聚合物改性水泥基粘结复合材料的粘结性能研究[D].长沙:湖南大学,2014.
[18]梁乃兴,曹源文,姚红云.聚合物改性水泥混凝土路用性能研究[J].公路交通科技,2005,22(3):21-23.
[19]熊剑平,申爱琴,魏越强,等.聚合物水泥混凝土的路用性能[J].长安大学学报(自然科学版),2007,27(6):24-28.
[20]张二芹.聚合物改性水泥混凝土的力学性能及耐久性研究[D].沈阳:沈阳工业大学,2016.
[21]王晓龙.聚合物水泥混凝土的试验研究[J].煤炭技术,2009,28(5):126-128.
[22]熊剑平.聚合物改性水泥混凝土路用性能研究[D].西安:长安大学,2005.
[23]柯国炬.路面机制砂水泥混凝土耐磨性影响因素研究[D].武汉:武汉理工大学,2010.