Complete substitution of natural aggregates with industrial wastes in road subbase: A field study

Bakare, M. D.; Shahu, J. T.; Patel, Sankita J.

doi:10.1016/j.resconrec.2022.106856

Cited by 14 publications

(4 citation statements)

References 39 publications

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“…In China, concrete pavements with fibers made from fly ash seemed to be more resistant to water and other stress factors (e.g., heat, frost), with material and energy savings compared to conventional production [20]. The use of fly ash mixed with other industrial byproducts in different proportions-such as 80% fly ash + 20% granulated blast furnace slag, or 70% copper slag + 30% fly ash-shows good results in laboratory tests combined with samples from road pavement [21].…”

Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment for Substitutive Building Materials Using the Example of the Vietnamese Road Sector

Schneider

Mihai

et al. 2023

Applied Sciences

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Road construction usually relies on the utilization of natural aggregates as building materials. However, increasing pressure for sustainable roads highlights the importance of replacing natural materials with industrial byproducts. The scope of the present study was to identify feasible secondary raw materials for road subbase construction, and to investigate their environmental footprint in the context of Vietnam. This work examines road subbase alternatives such as manufactured sand (m-sand), granulated blast furnace slag (GBF), electric arc furnace slag (EAF), construction and demolition waste (CDW), and fly ash (FA). Based on the life-cycle assessment (LCA) approach, the environmental footprints of the alternative waste-based layers were compared with one another and with the corresponding conventional layers. The study comprises following working steps: (i) a comprehensive literature review of the respective materials, (ii) general chemical and soil mechanical analysis of road subbase substitutes, and (iii) LCA of the material alternatives in the context of the Vietnamese road construction sector. The results for the road subbase layer indicated that CDW and FA had lower impacts—particularly in the impact categories global warming potential and mineral resource scarcity. The overall LCA analysis for the road subbase layer highlighted that the greatest footprint contribution was involved in the construction material transportation processes. Thus, sourcing of materials closer to the site or the use of low-emission transport alternatives is needed.

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Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment for Substitutive Building Materials Using the Example of the Vietnamese Road Sector

Schneider

Mihai

et al. 2023

Applied Sciences

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“…Production of aggregate from fly ash can also help thermal power plants in achieving the target of 100% fly ash utilization. Several advantages of producing fly ash artificial aggregate are natural resource conservation; reducing the amount of energy used in quarrying operations; transforming waste into high-value items; and producing lighter aggregate [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Potential Use of Fly Ash for Developing Angular-shaped Aggregate

Singh

Patel

2023

IJE

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The prices of aggregate are increasing in India due to the massive demand for natural aggregate for infrastructure development. An attempt has been made to check the feasibility of the past developed technique for developing angular-shaped light-weight fly ash coarse aggregate from three different types of fly ashes. In this study, the effects of binder content, water content and hot water bath curing temperature on the compressive strength of blocks, as well as the impact value of prepared aggregate for fly ash-binder mixes were investigated. A relationship between impact value and compressive strength has also been suggested to predict the impact value of fly ash aggregate based on the compressive strength of block. For making angular-shaped fly ash aggregate, it was found that the fly ash with CaO content of 0.71%-3.85% requires higher binder content and curing temperature than that required for fly ash with CaO content of 10.45%. The resulting lightweight aggregates from three fly ashes have a compacted structure and angular shape for good interlocking. The results of mechanical properties test showed that the aggregate also meets the criteria of Indian code specifications for structural concrete aggregate.

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“…Typically, the design of flexible pavement consists of three main layers beginning with the surface course. The surface course is the top layer and serves as a moderately impermeable course that is robust, smooth, and abrasion resistant [5]. It must withstand the imposed wheel loads and safely transmit them to the layer below, since it is in close contact with the tires of the vehicle [6,7].…”

Section: Introductionmentioning

confidence: 99%

Effects of Metal Waste Strips on Strength Characteristics of Road Base Material

Ibrahim,

Sinani,

Sinani

et al. 2023

Sustainability

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Metal manufacturing produces various types of byproducts and metal waste that have been growing exponentially. The increasing amounts of metal waste are usually disposed of in landfills, which causes soil and water pollution and increases the amount of gas emissions. On the other hand, in the field of pavement construction, the demand for natural materials is increasing rather rapidly. Many studies have suggested utilizing aggregate-like waste material in pavement construction, but there is little to no literature documenting the use of metal strips of different types. The aim of this study is to investigate utilizing the metal waste produced by the Intag Sohar company in layers of flexible pavement. Selected types of metal waste were utilized in the construction of the material used for base and subbase road layers. Three main parameters were studied: the number of layers, the distance between strips, and the direction of the strips. The effect of the metal waste on the pavement material is evaluated using the standard California Bearing Ratio test (CBR), which is the most important indication of the strength of the pavement material. Results show that the highest-quality mix consisted of four layers of metal waste with 1 cm spacing in one direction with CBR% values equal to 118.807%.

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Complete substitution of natural aggregates with industrial wastes in road subbase: A field study

Cited by 14 publications

References 39 publications

Life Cycle Assessment for Substitutive Building Materials Using the Example of the Vietnamese Road Sector

Life Cycle Assessment for Substitutive Building Materials Using the Example of the Vietnamese Road Sector

Potential Use of Fly Ash for Developing Angular-shaped Aggregate

Effects of Metal Waste Strips on Strength Characteristics of Road Base Material

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