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Aim of this study is to evaluate the upcycling of oil shale ash (OSA) for highway concrete compacted with roller known as roller compacted concrete (RCC). The RCC specimens were prepared replacing 0%, 10%, 20%, 30%, and 40% OSA with cement to measure unit volume mass, compressive strength, flexural strength, and loss on unit volume mass and compressive strength after freezing and thawing cycles. The results showed that the upcycling of OSA done in current study has effective method on the properties of the RCC tested. The RCC specimens containing 10% OSA reached the compressive strength, greater than 35 (MPa) at 28d. Based on the experimental results, it is possible to use the OSA in manufacturing of highway concrete compacted with roller. Additionally, the work as upcycling example would help to reduce the quantity of OSA and to improve the properties of cement-based material and to reduce the cost of construction and to protect the environment from harmful effect of manufacturing of oil and cement.
Water exists in nature with three forms as; aboveground water resources such as river, lake, and sea, underground water resources and water vapour in atmosphere. Ceramic-structured construction materials such as concrete, stone, brick are intrinsically porous materials. Porous systems, which exist in construction materials, are decreased or construction systems are insulated against water by using waterproofing materials to protect construction systems from water impact. Within essential construction materials, some additives with cement are used in concrete production in order to reduce the amount of porosity, improve qualities, increase durability and ensuring affordability of concrete in a particular way. In this study, the effect of wheat straw ash, which is one of the pozzolanic materials, investigated with the aim of reducing the amount of porosity and size of concrete, preventing continuity of capillary pores, minimizing their permeability and improving concrete strength qualities.
