Recycling of industrial and agricultural wastes as alternative coarse aggregates: A step towards cleaner production of concrete

Chinnu, S.N.; Minnu, S.N.; Bahurudeen, A.; Senthilkumar, R.

doi:10.1016/j.conbuildmat.2021.123056

Cited by 79 publications

(25 citation statements)

References 94 publications

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“…At 7 days after production, particle densities in SSD condition ranged from 1.591 to 1.834 g/cm 3 , and from 1.254 to 1.771 g/cm 3 in oven-dry condition. These values are significantly lower than those reported for pure fly-ash cold-bonded pellets (ranging from 1.650 to 2.120 g/cm 3 [14]) and close to those reported for agricultural wastes used as aggregates, such as coconut shells (ranging from 1.120 to 1.890 g/cm 3 [14,34,35]). Formulations at higher sawdust contents exhibited lower densities.…”

Section: Particle Density Water Absorption Capacity and Drying Shrinkagesupporting

confidence: 59%

“…Unlike methods requiring autoclaving or sintering at high temperature, production of aggregates by cold bonding relies on hardening reactions that take place spontaneously at ambient temperature [13]. The process involves the agglomeration of fine particles into pellets by the combined action of tumbling forces and capillary forces in a rotating vessel where the raw materials are brought into contact with the right amount of moisture [14]. The freshly made pellets maintain their shape due to these forces, but can gain additional strength by chemical reactions involving binders included in the raw material mix or in the added liquid.…”

Section: Introductionmentioning

confidence: 99%

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Low-Energy Lightweight Aggregates by Cold Bonding of Biomass Wastes: Effects of Raw Material Proportion Adjustments on Product Properties

Serpell¹,

Zwicky²

2021

SSRN Journal

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Section: Particle Density Water Absorption Capacity and Drying Shrinkagesupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Low-Energy Lightweight Aggregates by Cold Bonding of Biomass Wastes: Effects of Raw Material Proportion Adjustments on Product Properties

Serpell¹,

Zwicky²

2021

SSRN Journal

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“…The annual production of steel slag was more than 100 million tons with a low comprehensive-utilization rate of only about 30% [ 10 ]. The accumulation of steel slag causes water pollution, heavy-metal release and other problems by occupying a lot of land [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Asphalt-Mortar-Aging-Resistance-Modifier Dosage Based on Second-Generation Non-Inferior Sorting Genetic Algorithm

Cui

et al. 2022

Materials

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The use of steel slag powder instead of filler to prepare asphalt mortar was beneficial to realize the effective utilization of steel slag and improve the performance of asphalt concrete. Nevertheless, the anti-aging properties of steel-slag powder–asphalt mortar need to be further enhanced. This study used antioxidants and UV absorbers in steel-slag powder–asphalt mortar to simultaneously improve its thermal-oxidation and UV-aging properties. The dosage of modifier was optimized by second-generation non-inferior sorting genetic algorithm. Fourier-Transform Infrared Spectroscopy, a dynamic shear rheometer and the heavy-metal-ion-leaching test were used to evaluate the characteristic functional groups, rheological properties and heavy-metal-toxicity characteristics of the steel-slag-powder-modified asphalt mortar, respectively. The results showed that there was a significant correlation between the amount of modifier and G*, δ, and the softening point. When the first peak appeared for G*, δ, and the softening point, the corresponding dosages of x1 were 2.15%, 1.0%, and 1.1%, respectively, while the corresponding dosage of x2 were 0.25%, 0.76%, and 0.38%, respectively. The optimal value of the modifier dosage x1 was 1.2% and x2 was 0.5% after weighing by the NSGA-II algorithm. The asphalt had a certain physical solid-sealing effect on the release of heavy-metal ions in the steel-slag powder. In addition, the asphalt structure was changed under the synergistic effect of oxygen and ultraviolet rays. Therefore, the risk of leaching heavy-metal ions was increased with the inferior asphalt-coating performance on the steel-slag powder.

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“…Anyway, the lower crushing strength of lignocellulosic aggregates resulted in subsequent changes in the mechanical resistance, increasing the replacement levels and durability properties of composites. These products incorporate a thermal insulation capacity as positive factor (Rojas et al, 2019) due to the density reduction of the composites (Chinnu et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Reuse of banana fiber and peanut shells for the design of new prefabricated products for buildings

Echeverría-Maggi

Alés²,

Martín-del-Río³

2022

rdlc

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This work presents a sustainable panel elaboration for housing interiors through banana fiber and peanut shells gathered from crop residues, consolidated with a polyester resin binder. A material characterization process was defined by forming three prototypes with different dosages. The prototypes performed physical and mechanical tests following recommendations from previous research and the standards. The results obtained were favorable regarding thermal transmittance percentages, achieving an average resistance comparable to non-structural medium density particleboard (MDP). Performance comparisons were also established, which depict the potential of these prototypes to contribute to the building industry, including the development of thermally comfortable environments.

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Recycling of industrial and agricultural wastes as alternative coarse aggregates: A step towards cleaner production of concrete

Cited by 79 publications

References 94 publications

Low-Energy Lightweight Aggregates by Cold Bonding of Biomass Wastes: Effects of Raw Material Proportion Adjustments on Product Properties

Low-Energy Lightweight Aggregates by Cold Bonding of Biomass Wastes: Effects of Raw Material Proportion Adjustments on Product Properties

Optimization of Asphalt-Mortar-Aging-Resistance-Modifier Dosage Based on Second-Generation Non-Inferior Sorting Genetic Algorithm

Reuse of banana fiber and peanut shells for the design of new prefabricated products for buildings

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