ABSTRACT

In this study, the performance of two steel slag byproducts is investigated to produce mixtures for base layers of unpaved roads. The basic physical properties including Atterberg limits, grain size distribution, California bearing ratio and expansion tests of eight different mixtures of soil-byproduct are investigated in laboratory to understand the engineering properties of the mixtures. The byproducts are mixed in different proportions from 50% to 80% by weight with a local (clayey) subgrade soil. Subsequently, two selected mixtures are used to build an experimental road section along an unsurfaced road. Results demonstrate that the gradation and strength of the samples satisfy the requirements for base layers. Furthermore, the mixtures are shown to be of low-plasticity at higher byproduct content and non-expansive. Field investigations show that 12 roller passes at the standard Proctor and 14 at the intermediate Proctor are enough to reach 100% of the degree of compaction.

摘要

在这项研究中，研究了两种钢渣副产品的性能，以生产未铺砌道路基层的混合物。在实验室中研究了基本物理特性，包括 Atterberg 极限、粒度分布、加利福尼亚承载比和八种不同土壤副产品混合物的膨胀试验，以了解混合物的工程特性。副产品以 50% 到 80% 的不同比例与当地（粘土）路基土壤混合。随后，使用两种选定的混合物沿着未铺面的道路建造实验路段。结果表明，样品的级配和强度满足基层的要求。此外，该混合物在较高的副产品含量下显示出低可塑性和非膨胀性。