碎石高聚物复合多孔材料强度特性试验研究
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摘要
采用室内试验对碎石高聚物复合材料的抗压和抗折强度进行了研究,分析了材料配合比、碎石粒径等因素对其强度的影响,同时还进行了耐光热老化试验和耐水流冲刷侵蚀试验。结果表明:碎石高聚物多孔材料的强度主要来源于高聚物胶黏剂的氧化固结作用和碎石集料间的相互嵌挤,前期增长迅速,后期逐渐趋于平稳;胶粘剂用量、碎石粒径、养护龄期等因素均会对其强度产生影响,其中胶黏剂用量、碎石粒径对强度影响显著;在光热条件综合作用下,碎石高聚物多孔材料强度有所降低;在不同的水流作用下,碎石高聚物多孔材料基本都不会产生冲刷侵蚀。
Laboratory test by gravel and polymer was conducted to study the compressive and flexural strength of this new material and analyze the effects of proportioning and grain size on the strength, together with the tests for the resistance to light-heat aging and to water scouring erosion carried out, simultaneously. The result shows that the strength of gravel-polymer composite porous material is mainly contributed by the oxidation-solidification of polymer adhesive and the interlock of gravel aggregate, growing fast in earlier stage and then gradually leveling off in later stage; adhesive content, grain size and curing period have effects on the strength, wherein the effects of adhesive content and grain size are significant; under synthetic photothermolysis, the strength may decrease to certain extent; erosion would not happen on the material under different actions of water scouring, substantially.
Laboratory test by gravel and polymer was conducted to study the compressive and flexural strength of this new material and analyze the effects of proportioning and grain size on the strength, together with the tests for the resistance to light-heat aging and to water scouring erosion carried out, simultaneously. The result shows that the strength of gravel-polymer composite porous material is mainly contributed by the oxidation-solidification of polymer adhesive and the interlock of gravel aggregate, growing fast in earlier stage and then gradually leveling off in later stage; adhesive content, grain size and curing period have effects on the strength, wherein the effects of adhesive content and grain size are significant; under synthetic photothermolysis, the strength may decrease to certain extent; erosion would not happen on the material under different actions of water scouring, substantially.
引文
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[2] 朱荡荡.透水性混凝土护坡板的性能及应用的研究[D].湘潭:湖南科技大学,2012.ZHU D D.Research on performance and application of slope protection board of permeable concrete[D].Xiangtan:Hunan University of Science and Technology,2012.
[3] 刘峰,颜庭成.现浇透水性生态混凝土在河道边坡工程中的应用[J].地质学刊,2011,35(4):418-423.LIU F,YAN T C.Application of cast-in-place permeable eco-concrete in slope engineering of river course[J].Journal of Geology,2011,35(4):418-423.
[4] 陈小华,李小平.河道生态护坡关键技术及其生态功能[J].生态学报,2007,27(3):1168-1176.CHEN X H,LI X P.The eco-functions of ecological protection techniques of riverbank[J].Acta Ecologica Sinica,2007,27(3):1168-1176.
[5] 杨晓华,王文生.土工格室生态护坡在黄土地区公路边坡防护中的应用[J].公路,2004(8):179-182.YANG X H,WANG W S.Application of geocell ecological slope protection in highway slope protection in loess area[J].Highway,2004(8):179-182.
[6] 赵警卫,芦建国,王荣华.七种生态护坡在高速公路边坡的应用效果[J].公路,2006(1):201-204.ZHAO J W,LU J G,WANG R H.Application effect of seven kinds of ecological slope protection on highway slope[J].Highway,2006(1):201-204.
[7] GB/T 50081—2002 普通混凝土力学性能试验方法标准[S].北京:中国建筑工业出版社,2003.GB/T 50081—2002 Standard for Test Method of Mechanical Properties on Ordinary Concrete[S].Beijing:China Architecture & Building Press,2003.