首页|橡胶粉-水泥砂浆柔性人造粗骨料的制备及性能

橡胶粉-水泥砂浆柔性人造粗骨料的制备及性能

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为提高混凝土材料的减震吸能性能,将废旧轮胎橡胶粉掺入到水泥砂浆中制备兼具承载和吸能作用的柔性人造粗骨料,通过骨料密度、吸水率、压碎指标、单颗强度、自由落体回弹及混凝土单轴压缩等测试,研究了橡胶粉掺量、粒径对人造粗骨料基础性能、力学与能量耗散性能的影响.结果表明:橡胶粉-水泥砂浆柔性人造粗骨料的各项基础性能良好,且具有良好的抗压强度,能够显著改善混凝土的能量耗散性能.在橡胶粉粒径250~380 µm、掺量体积分数20%条件下,柔性人造粗骨料比天然骨料的能量耗散率提升了 21.1个百分点,在保证混凝土抗压强度的情况下,含柔性人造粗骨料混凝土较天然骨料混凝土耗散能量提高了 1.294 MJ·m-3.研究制备的柔性人造粗骨料能够显著改善混凝土的能量耗散性能,为有高自减震性能要求的工程提供了新材料,同时可实现废旧橡胶资源化利用.
Preparation and Properties of Rubber Powder-Cement Mortar Flexible Artificial Coarse Aggregate
To improve the vibration damping and energy dissipation performance of concrete materials,waste tire rubber powder was added into cement mortar to produce flexible artificial coarse aggregate with both load-bearing and energy dissipation capabilities.Through various tests such as bulk density,water absorption rate,crushing index,single particle strength,free-fall rebound,and uniaxial compression of concrete,the study explores the influence of rubber powder content and particle size on the basic properties,mechanical properties,and energy dissipation performance of the artificial coarse aggregate.The results show that the flexible rubber powder-cement mortar artificial coarse aggregate has good basic performance and good compressive strength and can significantly improve the energy dissipation performance of concrete.Under the condition of using rubber powder particles with a size range of 250-380 μm and a volume addition of 20%,the energy dissipation rate of flexible artificial coarse aggregate has increased by 21.2 percentage points compared to natural aggregate.The energy dissipation of concrete containing flexible artificial coarse aggregate is 1.294 MJ·m-3 higher than that of natural aggregate concrete while the compressive strength is unaffected.The flexible artificial coarse aggregate prepared by the research can significantly improve the energy dissipation performance of concrete,which provides new materials for projects with high self-damping performance requirements and achieves the reuse of waste rub-ber resources.

Rubber powderFlexible artificial coarse aggregateEnergy dissipationConcrete

张柯莹、辜涛、王世兰、邹孟同、张高寅、刘来宝、张礼华

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西南科技大学材料与化学学院 四川绵阳 621010

橡胶粉 柔性人造粗骨料 能量耗散 混凝土

2024

西南科技大学学报
西南科技大学

西南科技大学学报

影响因子:0.348
ISSN:1671-8755
年,卷(期):2024.39(3)