基于正交试验的橡胶天然浮石混凝土力学性质的研究
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摘要
以橡胶天然浮石混凝土为研究对象,通过正交试验法研究橡胶颗粒粒径和橡胶颗粒掺量、水胶比3种因素对混凝土力学性质的影响,通过橡胶天然浮石混凝土抗压强度、劈裂抗拉强度和拉压比得出物理力学性能最优组以及因素主次之分;再通过RapidAir混凝土气孔结构分析仪分析最优组气泡间距系数、孔隙率与抗压强度之间的关系,从气泡间距、孔隙率等微观角度解释宏观力学性能、表征微观形态。结果表明:粒径为20目,掺量为6%的橡胶天然浮石混凝土力学性质最优;水胶比和橡胶颗粒掺量是影响橡胶天然浮石混凝土力学性质的主要因素。
The rubber natural pumice concrete as the research object,the influence of rubber particle size and rubber particle dosage and water-rubber ratio on the mechanical properties of concrete was studied by orthogonal test,and the optimum group of physical and mechanical properties and the primary and secondary factors were obtained through compressive strength,splitting tensile strength and tension-pressure ratio of the rubber natural pumice concrete.Through analyzing the relationship between the bubble spacing coefficient,porosity and compressive strength of the optimal group through the RapidAir concrete pore Structure analyzer,the macroscopic mechanical properties and the microscopic morphology are explained from the microscopic angles of bubble spacing and porosity.The results show that the mechanical properties of the rubber natural pumice concrete with a particle size of 20 meshes and a volume of 6% are the best;the ratio of water to rubber and the amount of rubbers are the main factors affecting the mechanical properties of the rubber natural pumice concrete.
The rubber natural pumice concrete as the research object,the influence of rubber particle size and rubber particle dosage and water-rubber ratio on the mechanical properties of concrete was studied by orthogonal test,and the optimum group of physical and mechanical properties and the primary and secondary factors were obtained through compressive strength,splitting tensile strength and tension-pressure ratio of the rubber natural pumice concrete.Through analyzing the relationship between the bubble spacing coefficient,porosity and compressive strength of the optimal group through the RapidAir concrete pore Structure analyzer,the macroscopic mechanical properties and the microscopic morphology are explained from the microscopic angles of bubble spacing and porosity.The results show that the mechanical properties of the rubber natural pumice concrete with a particle size of 20 meshes and a volume of 6% are the best;the ratio of water to rubber and the amount of rubbers are the main factors affecting the mechanical properties of the rubber natural pumice concrete.
引文
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[2]王萧萧.寒冷地区盐渍溶液环境下天然浮石混凝土耐久性研究[D].呼和浩特内蒙古农业大学,2015.
[3]THONG O.Crumb rubber in mortar cement application[D].Arizona:Arizona State University,2001.
[4]TOUTANJ H A.The use of rubber tire particles in concrete to replace aggretates[J].Cement and Concrete research,1996,18(2):135-139.
[5]TOPCUI B.The properties of rubberized concretes[J].Cement and Concrete research,1995(25):304-310.
[6]刘日鑫,侯文顺,徐永红,等.废橡胶颗粒对混凝土力学性能的影响[J].建筑材料学报,2009,12(3):341-344.
[7]刘学艳,刘彦龙,杨宝珍.胶粒混凝土在道路工程中的应用[J].东北林业大学学报,2006,34(2):111-112.
[8]胡鹏,朱涵,王旻.橡胶集料混凝土渗透性能的研究[J].天津理工大学学报,2006,22(4):8-12.
[9]黄少问,徐玉华.废旧轮胎橡胶粉对水泥砂浆力学性能的影响[J].南昌大学学报(工学版),2004,26(4):53-55.
[10]王海龙,申向东,王萧萧,等.橡胶轻骨料混凝土的物理力学性能[J].硅酸盐通报,2015,34(8):2267-2273.
[11]汤道义,袁海庆,静行.橡胶改性轻集料混凝土的力学性能研究[J].武汉理工大学学报,2008,30(1):6-8.
[12]胡玉保,雷达.橡胶改性轻集料混凝土的试验研究[J].混凝土,2013(6):70-72.
[13]MU譙OZ-S魣NCHEZ B,AR魪VALO-CABALLERO M J,PACHECO-MENOR M C.Influence of acetic acid and calcium hydroxide treatments of rubber waste on the properties of rubberized mortars[J].Materials and Structures,2017,50(1):75.
[14]马一平,刘晓勇,谈至明,等.改性橡胶混凝土的物理力学性能[J].建筑材料学报,2009,12(4):379-383.
[15]SECRE N,JOEKES I.Use of tire rubber particles as addition to cementpaste[J].Cement and Concrete Research,2000,30(9):1421-1425.
[16]何世钦,王海超.高性能混凝土配合比设计的正交试验研究[J].工业建筑,2003(8):8-10+41.
[17]王宝民,涂妮,郭志强.橡胶混凝土抗氯离子渗透性能试验研究[J].低温建筑技术,2012,34(9):1-3.