橡胶粒径与掺量对砂浆力学性能影响的试验研究
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摘要
系统研究了橡胶粒径和掺量对橡胶砂浆力学性能的影响,橡胶等体积替代砂子比例为20%、40%、60%,橡胶粒径分别为5～20目、20～40目、60～80目。研究结果表明,橡胶砂浆抗压强度和抗折强度均随橡胶掺量的增大而降低,随橡胶粒径的减小而提高。优选橡胶粒径为60～80目时,具有20%、40%和60%橡胶掺量的橡胶砂浆抗压强度分别降低21. 6%、43. 3%和55. 8%,抗折强度分别降低14. 9%、29. 4%和33. 8%。另外,橡胶掺量越大,粒径越小,则橡胶砂浆折压比越大,韧性越好。该项研究对促进废弃橡胶的规模化应用,提高混凝土的韧性,具有重要的理论和实用价值。
The effect of rubber particle size and content on mechanical properties of rubber mortar was studied systematically. Rubber and other volume replacement sand ratio of 20%,40%,60%,rubber particle size is 5 ～20,20 ～ 40,60 ～ 80 mesh. The results show that the compressive strength and flexural resistance of rubber mortar decrease with the increase of rubber content,and increase with the decrease of rubber particle size. When the rubber diameter is 60 ～ 80 mesh,the compressive strength of rubber mortar with 20%,40% and 60% rubber content is reduced by 21. 6%,43. 3% and 55. 8% respectively,and the flexural strength decreases 14. 9%,29. 4% and33. 8% respectively. In addition,the larger the rubber content and the smaller the particle size,the greater the compression ratio of rubber mortar,the better the toughness. The study has important theoretical and practical value in promoting the large-scale application of waste rubber and improving the toughness of the concrete.
The effect of rubber particle size and content on mechanical properties of rubber mortar was studied systematically. Rubber and other volume replacement sand ratio of 20%,40%,60%,rubber particle size is 5 ～20,20 ～ 40,60 ～ 80 mesh. The results show that the compressive strength and flexural resistance of rubber mortar decrease with the increase of rubber content,and increase with the decrease of rubber particle size. When the rubber diameter is 60 ～ 80 mesh,the compressive strength of rubber mortar with 20%,40% and 60% rubber content is reduced by 21. 6%,43. 3% and 55. 8% respectively,and the flexural strength decreases 14. 9%,29. 4% and33. 8% respectively. In addition,the larger the rubber content and the smaller the particle size,the greater the compression ratio of rubber mortar,the better the toughness. The study has important theoretical and practical value in promoting the large-scale application of waste rubber and improving the toughness of the concrete.
引文
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8 American Society for Testing Materials. Standard test method for flexural strength of hydraulic-cement mortars:PA19428-2959[S]. West Conshohocken:American Society for Testing Materials International,2014
9 李赞成,许金余,罗鑫,等.橡胶混凝土的基本力学特性的试验研究[J].硅酸盐通报,2013,12(12):2589-2594Li Zancheng,Xu Jinyu,Luo Xin,et al. Experimental study on the basic mechanical properties of rubber concrete[J]. Silicate Circular,2013,12(12):2589-2594
2王林龙,简宇桥,童代伟.橡胶混凝土研究进展[J].公路交通技术,2017,33(1):17-20Wang Linlong,Jian Yuqiao,Tong Daiwei. Progress in research of rubber concrete[J]. Highway Traffic Technology,2017,33(1):17-20
3 杨春峰,杨敏.废旧橡胶混凝土力学性能研究进展[J].混凝土,2011(12):98-109Yang Chunfeng,Yang Min. Progress in mechanical properties of waste rubber concrete[J]. Concrete,2011(12):98-109
4 刘誉贵.橡胶混凝土性能研究进展[J].合成材料老化与应用,2017,46(4):83-87Liu Yugui. Research progress of rubber concrete properties[J]. Aging and Application of Synthetic Materials,2017,46(4):83-87
5 田帅,李野,李玮峰.路用橡胶混凝土的研究现状及前景[J].混凝土,2011(7):87-91Tian Shuai,Li Ye,Li Weifeng. Present situation and prospect of rubber concrete for road[J]. Concrete,2011(7):87-91
6 李聚明.橡胶改性沥青混凝土在机场道面中的应用[J].混凝土,2014(1):51-55Li Juming. Application of rubber modified asphalt concrete in airport pavement[J]. Concrete,2014(1):51-55
7 叶友君.橡胶集料混凝土与钢组合梁疲劳性能研究[D].天津:天津大学,2012Ye Youjun. Study on fatigue behavior of rubber aggregate concrete and steel composite beams[D]. Tianjin:Tianjin University,2012
8 American Society for Testing Materials. Standard test method for flexural strength of hydraulic-cement mortars:PA19428-2959[S]. West Conshohocken:American Society for Testing Materials International,2014
9 李赞成,许金余,罗鑫,等.橡胶混凝土的基本力学特性的试验研究[J].硅酸盐通报,2013,12(12):2589-2594Li Zancheng,Xu Jinyu,Luo Xin,et al. Experimental study on the basic mechanical properties of rubber concrete[J]. Silicate Circular,2013,12(12):2589-2594