Batayneh Malek K, Marie Iqbal, Asi Ibrahim
Fulbright Scholar at CFL, North Carolina State University, Campus Box 7533, Raleigh, NC 27695, USA.
Waste Manag. 2008 Nov;28(11):2171-6. doi: 10.1016/j.wasman.2007.09.035.
The use of accumulated waste materials in third world countries is still in its early phases. It will take courage for contractors and others in the construction industry to recycle selected types of waste materials in the concrete mixes. This paper addresses the recycling of rubber tires accumulated every year in Jordan to be used in concrete mixes. The main objectives of this research were to provide more scientific evidence to support the use of legislation or incentive-based schemes to promote the reuse of accumulated waste tires. This research focused on using crumb tires as a replacement for a percentage of the local fine aggregates used in the concrete mixes in Jordan. Different concrete specimens were prepared and tested in terms of uniaxial compression and splitting tension. The main variable in the mixture was the volumetric percentage of crumb tires used in the mix. The test results showed that even though the compressive strength is reduced when using the crumb tires, it can meet the strength requirements of light weight concrete. In addition, test results and observations indicated that the addition of crumb rubber to the mix has a limited effect toward reducing the workability of the mixtures. The mechanical test results demonstrated that the tested specimens of the crumb rubber concrete remained relatively intact after failure compared to the conventional concrete specimens. It is also concluded that modified concrete would contribute to the disposal of the non-decaying scrap tires, since the amount being accumulated in third world countries is creating a challenge for proper disposal. Thus, obliging authorities to invest in facilitating the use of waste tires in concrete, a fundamental material to the booming construction industry in theses countries, serves two purposes.
在第三世界国家，累积废料的利用仍处于早期阶段。建筑行业的承包商和其他人员若要在混凝土混合料中回收特定类型的废料，需要勇气。本文探讨了约旦每年累积的废旧轮胎在混凝土混合料中的回收利用。本研究的主要目的是提供更多科学依据，以支持利用立法或基于激励的计划来促进累积废旧轮胎的再利用。本研究着重于使用碎轮胎替代约旦混凝土混合料中一定比例的当地细骨料。制备了不同的混凝土试件，并进行了单轴压缩和劈裂拉伸试验。混合料中的主要变量是碎轮胎在混合料中所占的体积百分比。试验结果表明，尽管使用碎轮胎时抗压强度会降低，但仍能满足轻质混凝土的强度要求。此外，试验结果和观察表明，向混合料中添加碎橡胶对降低混合料的工作性影响有限。力学试验结果表明，与传统混凝土试件相比，碎橡胶混凝土试件在破坏后仍相对完好。研究还得出结论，改性混凝土将有助于处理不易腐烂的废旧轮胎，因为在第三世界国家累积的废旧轮胎数量给妥善处理带来了挑战。因此，迫使当局投资促进废旧轮胎在混凝土中的使用，混凝土是这些国家蓬勃发展的建筑业的基本材料，这一举动有两个目的。
