Natural gravel-recycled aggregate concrete applied in rural highway pavement: Material properties and life cycle assessment

Tang, Yuxiang; Liu, Qiong; Xia, Bing; Singh, Amardeep; Lv, Zijian; Song, Wenzhu

doi:10.1016/j.jclepro.2021.130219

Cited by 38 publications

(11 citation statements)

References 51 publications

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“…Concerns about the safety and contamination of the virus have led to the lifting of the ban on the use of disposable plastics, and as a result, the demand for water bottles, plastic bags, plastic packaging, and mask masks has increased. The use of protective products such as masks, gloves, and other plastic medical devices and their release into the environment cause these materials to enter and also close the waterways [19,20].…”

Section: Introductionmentioning

confidence: 99%

An Environmentally Friendly Solution for Waste Facial Masks Recycled in Construction Materials

et al. 2022

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In response to the COVID-19 pandemic, single-use disposable masks saw a dramatic rise in production. Facial masks that are not properly disposed of will expose the environment to a form of non-biodegradable plastic waste that will take hundreds of years to degrade. Therefore, recycling such waste in an eco-friendly manner is imperative. Fibered or shredded waste masks can be used to make green concrete that is an environmentally friendly solution to dispose the facial masks. This study prepared six classes of concrete samples, three of which contained fibers from masks and three of which contained shredded masks at the ages of seven days and 28 days. The results show that in the seven-day and 28-day samples, mask fiber added to the mixes resulted in increased compressive strength. For seven-day and 28-day samples, the compressive strength increased by 7.2% and 10%, respectively. Despite that, the results of the shredded mask addition to concrete indicate that the increase in shredded mask volume has a minor impact on the compressive strength of the seven-day samples. An increase in shredded mask from 0.75 to 1% increased 28-day compressive strength by 14%. However, the compressive strength of the mask fiber decreased by 8 after 1% volume. According to a thermal analysis of 28-day concrete samples, as the fiber percentage increases, the mass loss percentage increases. The mass loss rate for samples containing fibers is higher than that for samples containing shredded mask pieces. In general, based on the results mentioned above, the use of fiber in concrete in its fiber state enhances its strength properties. As a result, using shredded mask pieces in concrete leads to better curing due to the reduction of residual capillary pore water loss in construction materials.

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Section: Introductionmentioning

confidence: 99%

An Environmentally Friendly Solution for Waste Facial Masks Recycled in Construction Materials

et al. 2022

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“…There are alternatives to cement, which include slag–scrap composites from iron and steel production, and coal combustion residuals, known as fly ash which was used in this case. As per a study conducted by Tang et al (2021) [ 64 ], recycled aggregate concrete (RAC) can provide many benefits for large construction projects. The team used ready-mix concrete for the foundations; the slag and silica fume, which is a byproduct of producing silicon metal or ferrosilicon alloys, was used as a supplementary cementitious material.…”

Section: Results and Findingsmentioning

confidence: 99%

Assessment of building materials in the construction sector: A case study using life cycle assessment approach to achieve the circular economy

Dsilva,

Zarmukhambetova,

Locke

2023

Heliyon

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“…Also, whereas the effect was minimal on the ascending part of the stress–strain curve, the descending part of the curve became steeper or flatter, depending on the type of replacement. Tang et al 11 demonstrated that natural gravel‐recycled aggregate concrete satisfied the mechanical requirements for its usage in low‐grade pavements, and had significant environmental benefits. Bayraktar et al 12 studied the effect of washed recycled fine aggregates (W‐RFA), less washed (L‐RFA), and unwashed (U‐RFA) on the mechanical and durability properties of concrete.…”

Section: Literature Reviewmentioning

confidence: 99%

Structural and life cycle assessments of recycled aggregate concrete beams incorporating industrial hemp fibers

Ghosn

Hamad

Awwad

2023

Structural Concrete

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As a sustainable concrete material, hemp and recycled aggregate concrete (HRAC) is produced by partial replacement of natural coarse aggregates (NCA) with recycled concrete coarse aggregates (RCA) and industrial hemp fibers. The objective of the reported research was to investigate the structural performance of reinforced concrete beams prepared with HRAC and designed to fail in flexure, shear, or bond splitting modes of failure, and to compare that performance with companion control beams cast with conventional concrete. The significance stems for the fact that no previous research is reported on mixtures using such a combination of hemp fibers and RCA. Test results indicated that HRAC beams with 0.75% volumetric percentage hemp fibers and 50% RCA replacement had comparable peak load capacities to the control beams with no RCA and no fibers, with ±4% difference for all tested modes of failure. Additionally, the fracture energy of the HRAC beam was higher than the control beam by 3.6%, 17.9%, and 14.4% for the flexure, shear, and bond modes of failure, respectively. Moreover, a life cycle analysis (LCA) was considered to compare HRAC mix with conventional concrete mix in terms of the environmental aspects. LCA results indicated that HRAC is a sustainable concrete, specifically with respect to structural performance and lower environmental impact.

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Natural gravel-recycled aggregate concrete applied in rural highway pavement: Material properties and life cycle assessment

Cited by 38 publications

References 51 publications

An Environmentally Friendly Solution for Waste Facial Masks Recycled in Construction Materials

An Environmentally Friendly Solution for Waste Facial Masks Recycled in Construction Materials

Assessment of building materials in the construction sector: A case study using life cycle assessment approach to achieve the circular economy

Structural and life cycle assessments of recycled aggregate concrete beams incorporating industrial hemp fibers

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