Abstract
The construction of a roads network consumes high amounts of materials. The road materials are required to fulfill high standards like bearing capacity and low settlement susceptibility due to cyclic loading. Therefore, crushed aggregates are the primary subbase construction material. The material-intensity of road engineering leads to depletion of natural resources, and to avoid it, the alternative recycled materials are required to be applied to achieve sustainable development. The anthropogenic soils (AS), which are defined as man-made unbound aggregates, are the response to these requirements. For the successful application of the AS, a series of geotechnical laboratory and field tests were conducted. In this article, we present the set of 58 test results, including California Bearing Ratio (CBR) bearing capacity tests, oedometric tests, and cyclic CBR tests, to characterize the behavior of three AS types and to compare its reaction with natural aggregate (NA). The AS tested in this study are recycled concrete aggregate (RCA), fly ash and bottom ash mix (BS), and blast furnace slag (BFS). The results of the tests show that the AS has similar characteristics to NA, and in some cases, like compression characteristic, RCA and BFS behave a stiffer response to cyclic loading. The test results and analysis presented here extend the knowledge about AS compressibility and AS response to cyclic loading.
Highlights
The constant increase of investments in the construction industry leads to grooving production of man-made material (MM) unbound aggregate
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A set of tests was conducted to characterize the geotechnical parameters of anthropogenic soil and to compare the calculated properties with the geotechnical properties of natural aggregate
Summary
The constant increase of investments in the construction industry leads to grooving production of man-made material (MM) unbound aggregate. This type of material is mainly stored in landfills and highly contributes to gross waste products around the globe. The second target of MM wastes recycling is application as a base and a subbase in road construction layers [4,5,6,7]. This type of soil in road engineering is limited to the construction layers but can be used as an embankment fill or as a supplement to soil stabilization [8,9]. The use of nonrenewable resources such as natural aggregates (NA) is undesirable, and substitutes are highly recommended, especially in such constructions as roads [10]
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