1. 广州大学土木与交通工程学院
2. 东莞理工学院生态环境与建筑工程学院
3. 广州建筑股份有限公司
4. 广州一建建设集团有限公司
纸质出版:2025
移动端阅览
[1]莫金旭,任凤鸣,郭邵祖,等.基于湿法堆积密度优化的级配橡胶混凝土性能[J].新疆大学学报(自然科学版中英文),2025,42(06):641-653.
[1]莫金旭,任凤鸣,郭邵祖,等.基于湿法堆积密度优化的级配橡胶混凝土性能[J].新疆大学学报(自然科学版中英文),2025,42(06):641-653. DOI: 10.13568/j.cnki.651094.651316.2024.09.08.0003.
DOI:10.13568/j.cnki.651094.651316.2024.09.08.0003.
橡胶颗粒弹性模量低、与浆体之间的黏结性能差是导致其静态力学性能显著下降的主要原因.为改善橡胶混凝土性能,本文基于湿法堆积密度理论对其配合比进行优化设计,提出最优砂率和最佳水泥掺量,以及具有高堆积密度的橡胶混凝土配合比.此外,讨论了湿法堆积密度变化与其工作性、力学性能、耐久性等指标之间的关系.结果表明:相比现有研究,优化设计后级配橡胶混凝土工作性和抗压性能有所改善.随湿法堆积密度由0.775 6增加至0.825 7,级配橡胶混凝土的抗压强度和劈裂-抗拉强度分别提高约60.5%和29.1%,抗氯离子扩散系数和阻尼比分别降低约38.3%和6.5%.同时建立了湿法堆积密度与抗压强度、劈裂-抗拉强度、阻尼比和氯离子扩散系数之间的关系模型,为橡胶混凝土配合比设计和实际应用提供参考.
The low elastic modulus of rubber particles and their weak bonding with the cementitious matrix are the main causes of the marked reduction in the static mechanical properties of rubberized concrete. To improve performance
this study optimizes the mix design of crumb rubber concrete(CRC) based on the wet packing density theory
proposes the optimal sand ratio and cement content
and presents a high packing density CRC mix proportion. The relationships between changes in wet packing density and key performance indicators
including workability
mechanical properties
and durability
are examined. The results show that
compared with existing studies
the optimized gradation improves the workability and compressive performance of CRC. As the wet packing density increases from 0.775 6 to 0.825 7
compressive strength and splitting-tensile strength increase by approximately 60.5% and 29.1%
respectively
while the chloride ion permeability coefficient and damping ratio decrease by about 38.3% and 6.5%. Relationship models are established between wet packing density and compressive strength
splitting-tensile strength
damping ratio
and the chloride ion permeability coefficient
providing a reference for CRC mix design and practical application.
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