防堵塞型透水制品的制备与性能研究
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摘要
为改善路面透水性能,聚合物透水混凝土已逐渐广泛用于海绵城市的建设中。试验采用特细砂和环氧树脂制备透水材料,通过控制变量法,分别探讨砂的粒径和聚合物掺量对透水混凝土的抗压强度以及透水系数的影响;并进行了堵塞的模拟实验,基于图像分析透水混凝土的孔径大小,通过观察混凝土的微观结构分析其性能变化规律。实验结果表明,在粒径相同的情况下,随着环氧树脂掺量的增加,环氧树脂透水混凝土的抗压强度逐渐提高,而透水系数逐渐下降;环氧树脂透水混凝土抗压强度会随着较大粒径颗粒复掺含量的增大呈现先增加后下降的趋势,而透水系数呈现不断增大的趋势。当骨料粒径为0.15～0.3mm,环氧树脂掺量为骨料质量的5%时,制品的平均孔隙率为14%,平均等效直径为214μm;当粒径为0.15～0.3mm和0.3～0.6mm的骨料复掺比例为1:1时,综合效果较好,抗压强度达41.7MPa,透水系数为1.7mm/s,制品堵塞4次循环后,透水衰减系数小于20%,防堵塞性能良好。
In order to improve the permeable performance of pavement,polymer pervious concrete has been widely used in the construction of sponge city.Polymer experiment,special fine sand and epoxy resin were used to prepare materials required in tests.The influence of particle size and polymer content on the compressive strength and permeable coefficient of permeable concrete were discussed by controlling variable method.At the same time,the simulation experiment of blockage is carried out.Based on the image analysis,the pore of the permeable concrete is analyzed.Finally,the mechanism of its performance change is analyzed by observing the microscopic structure of the concrete.The experimental results show that with the increase of the amount of epoxy resin admixture,the compressive strength of epoxy resin permeable concrete increases and the permeable coefficient decreases.The compressive strength of epoxy resin permeable concrete will increase initially and then decrease with the increase of the dosage of the large particle size aggregate.The aggregate blending ratios with particle sizes of 0.15～0.3 and 0.3～0.6 were 1:1,with a compressive strength of 41.7 MPa and a permeation coefficient of 1.7 mm/s,as the best performance.After the product blocks four cycles,the permeability attenuation coefficient is less than 20%,and the anti-blockage performance is satisfactory and promising.
In order to improve the permeable performance of pavement,polymer pervious concrete has been widely used in the construction of sponge city.Polymer experiment,special fine sand and epoxy resin were used to prepare materials required in tests.The influence of particle size and polymer content on the compressive strength and permeable coefficient of permeable concrete were discussed by controlling variable method.At the same time,the simulation experiment of blockage is carried out.Based on the image analysis,the pore of the permeable concrete is analyzed.Finally,the mechanism of its performance change is analyzed by observing the microscopic structure of the concrete.The experimental results show that with the increase of the amount of epoxy resin admixture,the compressive strength of epoxy resin permeable concrete increases and the permeable coefficient decreases.The compressive strength of epoxy resin permeable concrete will increase initially and then decrease with the increase of the dosage of the large particle size aggregate.The aggregate blending ratios with particle sizes of 0.15～0.3 and 0.3～0.6 were 1:1,with a compressive strength of 41.7 MPa and a permeation coefficient of 1.7 mm/s,as the best performance.After the product blocks four cycles,the permeability attenuation coefficient is less than 20%,and the anti-blockage performance is satisfactory and promising.
引文
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[15]霍亮,高建明.透水性混凝土透水系数的试验研究[J].混凝土与水泥制品,2004(1):44-46.HUO L,GAO J M.Experimental study on permeability coeficient of pervious concrete[J].China Concrete and Cement Products,2004(1):44-46.(in Chinese)
[2]连亚明,徐仁崇,王伟,等.聚合物透水混凝土应用关键技术[J].商品混凝土,2017(4):45-47.LIAN Y M,XU R C,WANG W,et al.The application key technology of polymers pervious concrete[J].Ready-Mixed Concret,2017(4):45-47.(in Chinese)
[3]于伟蓉,覃维祖.环氧树脂微孔透水材料的制备和性能初步研究[J].新型建筑材料,2008,35(10):63-66.YU W R,TAN W Z.Preliminary research on preparation and properties of epoxy resin micro-porous permeable material[J].New Building Materials,2008,35(10):63-66.(in Chinese)
[4]张勇林.聚合物透水混凝土抗压强度和透水性能研究[J].福建建材,2016(7):7-9.ZHANG Y L.Study on compressive strength and permeable properties of polymer permeable concrete[J].Fujian Building Materials,2016(7):7-9.(in Chinese)
[5]张金花,高建明,翁智财,等.聚合物对透水性混凝土性能的影响[J].混凝土与水泥制品,2006(1):13-15.ZHANG J H,GAO J M,WENG Z C,et al.Influence of polymer on properties of porous concrete[J].China Concrete and Cement Products,2006(1):13-15.(in Chinese)
[6]宗晓军,杨杨,项晓睿,等.聚合物对生态透水砖性能影响的研究[J].新型建筑材料,2007,34(8):57-59.ZONG X J,YANG Y,XIANG X R,et.al.Investigation of effect of polymer on properties of ecotype pervious brick[J].New Building Materials,2007,34(8):57-59.(in Chinese)
[7]GIUSTOZZI F.Polymer-modified pervious concrete for durable and sustainable transportation infrastructures[J].Construction and Building Materials,2016,111:502-512.
[8]李子成,张爱菊,隋修志,等.透水混凝土界面增强增韧效应研究[J].硅酸盐通报,2017,36(2):747-752.LI Z C,ZHANG A J,SUI X Z,et.al.Reinforcing and toughening performance of interface in pervious concrete[J].Bulletin of the Chinese Ceramic Society,2017,36(2):747-752.(in Chinese)
[9]PEREZ J F,CALZADA P M.Analysis and evaluation of the performance of porous asphalt:The spanish experience[M]//PEREZ J F,CALZADA P M.eds.Surface Characteristics of Roadways International Research and Technologies.West Conshohocken,PA19428-2959:ASTM International:512-512-16.doi:10.1520/stp23386s.
[10]DEO O,SUMANASOORIYA M,NEITHALATH N.Permeability reduction in pervious concretes due to clogging:experiments and modeling[J].Journal of Materials in Civil Engineering,2010,22(7):741-751.
[11]徐仁祟,桂苗苗,龚明子,等.不同成型方法对透水混凝土性能的影响研究[J].混凝土,2011(11):129-131.XU R C,GUI M M,GONG M Z,et al.Impact of different molding methods on pervious concrete performance[J].Concrete,2011(11):129-131.(in Chinese)
[12]徐仁崇,桂苗苗,黄洪财,等.透水混凝土抗压强度及透水系数试验方法研究[C]//特种混凝土与沥青混凝土新技术及工程应用,2012:120-121.XU R C,GUI M M,HUANG H C,et al.Effect of polymer on permeable concrete properties[C]//New Technology And Engineering Application Of Special Concrete&Asphalt Concrete,2012:120-121.(in Chinese)
[13]KAYHANIAN M,ANDERSON D,HARVEY J T,et al.Permeability measurement and scan imaging to assess clogging of pervious concrete pavements in parking lots[J]Journal of Environmental Management,2012,95(1):114-123.
[14]崔新壮,张炯,黄丹,等.暴雨作用下透水混凝土路面快速堵塞试验模拟[J].中国公路学报,2016,29(10):1-11,19.CUI X Z,ZHANG J,HUANG D,et al.Experimental simulation of rapid clogging of pervious concrete pavement under effects of rainstorm[J].China Journal of Highway and Transport,2016,29(10):1-11,19.(in Chinese)
[15]霍亮,高建明.透水性混凝土透水系数的试验研究[J].混凝土与水泥制品,2004(1):44-46.HUO L,GAO J M.Experimental study on permeability coeficient of pervious concrete[J].China Concrete and Cement Products,2004(1):44-46.(in Chinese)