Analysis of the feasibility of the use of CDW as a low-environmental-impact aggregate in conglomerates

Barriguete, Alejandra Vidales; Merino, Mercedes del Río; Sánchez, Evangelina Atanes; Ramírez, Carolina Piña

doi:10.1016/j.conbuildmat.2018.05.011

Cited by 38 publications

(27 citation statements)

References 18 publications

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“…For plastics and polymers, which are two of the main industrial byproducts and home waste materials [ 2 ], various processes are being conducted to reuse and recycle them, such as mechanical recycling (secondary polymers are obtained through mechanical processes), chemical recycling (monomers are recovered to be employed as new virgin polymers or are transformed in other useful materials), and energy recovery (energy is obtained from the combustion of post-consumer plastics) [ 3 , 4 , 5 , 6 , 7 ]. Additionally, the introduction as fillers in other materials is becoming a possible solution for plastic and polymeric waste materials, especially in construction materials, with examples of reuse in various structural materials, such as concrete [ 8 , 9 , 10 , 11 , 12 , 13 ], mortars [ 14 , 15 , 16 , 17 , 18 ], bituminous materials for pavements [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ], and gypsum [ 31 , 32 , 33 , 34 , 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Economic Evaluation of the Use of Recycled Polyamide Powder in Masonry Mortars

et al. 2020

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Due to the considerable amount of waste plastics and polymers that are produced annually, the introduction of these waste products in construction materials is becoming a recurrent solution to recycle them. Among polymers, polyamide represents an important proportion of polymer waste. In this study, sustainable and lightweight mortars were designed and elaborated, substituting the aggregates by polyamide powder waste. Mortars were produced with various dosages of cement/aggregates, and the polyamide substitutions were 25, 50, 75, and 100% of the aggregates. The aim of this paper is to determine the density and the compressive strength of the manufactured mortars to observe the feasibility for being employed as masonry or rendering and plastering mortars. Results showed that with increasing polymer substitution, lower densities were achieved, ranging from 1850 to 790 kg/m3 in modified mortars. Mortars with densities below 1300 kg/m3 are cataloged as lightweight mortars. Furthermore, compressive strength also decreased with more polyamide substitution. Obtained values in recycled mortars were between 15.77 and 2.10 MPa, but the majority of the values (eight out of 12) were over 5 MPa. Additionally, an economic evaluation was performed, and it was observed that the use of waste polyamide implies an important cost reduction, apart from the advantage of not having to manage this waste material. Consequently, not only the mechanical properties of the new recycled materials were verified as well as its economic viability.

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Section: Introductionmentioning

confidence: 99%

Analysis and Economic Evaluation of the Use of Recycled Polyamide Powder in Masonry Mortars

et al. 2020

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“…For this, the existing bibliography in this area was consulted. In addition, an estimated calculation of the quantity of CO 2 and CO emitted was performed, based on the chemical decomposition of the PR, according to the results obtained in the thermogravimetric test and elemental analysis, conducted in a prior study and presented in Tables 2 and 3 [2,31]. Based on this calculation, an approximation was made of the quantity of CO and CO 2 emitted by the compounds in a room suffering from a real fire (Fig.…”

Section: Bases For the Theoretical Estimate Of The Combustion Gas Compositionmentioning

confidence: 99%

“…10). According to the previous study in which thermogravimetric analysis was performed on the waste included in the plasterboard, the fusion of the polymeric waste took place at an approximate temperature of 200 • C, and at approximately 500 • C, its thermal-oxidative decomposition in air was complete [2,31]. The decomposition of the waste led to a series of cavities in the panel mass, which weakened the connection of the gypsum particles.…”

Section: Behavior In Response To a Real Firementioning

confidence: 99%

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Behavior resulting from fire in plasterboard with plastic cable waste aggregates

Barriguete

Ramírez

Serrano-Somolinos

et al. 2021

Journal of Building Engineering

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This article analyzes the effect of fire on plasterboards with aggregates of plastic cable waste, considering the plaster coating as a strategy to reduce the flammability of the added polymers. A real test was performed, using a direct fire set in a Madrid fire station, and a theoretical estimate of the composition of the gas emissions, focused in CO 2 and CO, during a fire in a type room is presented. The results reflect that there is no clear trend between the evolution of temperatures over time and the amount of plastic waste added to the plaster matrix in the different specimens, but a different behavior is obtained depending on the surroundings where they are located. Temperatures of 600 • C are reached between 5 and 10 min after the start of the fire if they are located in a place with heat containment, and they do not reach 400 • C in the same period of time in a place with less heat containment. It was also observed that gypsum can be considered a passive protection of polymers, as it retards the effect of the flame on them. Concerning the gases released, the theoretical calculations, based on the elemental and thermogravimetric analysis of the plastic cable waste, reveal that the amount of carbon dioxide generated in a fire would not pose a risk to people's health whereas the values obtained for the carbon monoxide exceed the limited considered dangerous to health for a period greater than 15 min. Using plastic cable waste as secondary raw material reduces the number of incinerations to be carried out in landfills with this type of waste, thereby decreasing the potential emission of contaminants into the atmosphere and contributing to the sustainability of our planet.

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“…The manufacture of construction materials from waste co-products generated in construction processes represents an alternative to the use of traditional materials. Oriented towards the design of new ecological materials and using recovered construction waste, the investigations that have been developed over recent years have advanced considerably [ 30 , 31 , 32 , 33 ]. Likewise, the use of recovered waste has been considered for the manufacture of structural materials such as concrete, either separately or jointly with other aggregates, one example of which is lightweight ceramic materials [ 34 , 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of a Composite Lightweight Slab, Consisting of a Laminated Wooden Joist and Ecological Mortar

et al. 2020

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The investigation reported in this paper is an evaluation of the mechanical behavior of full-scale ecological mortar slabs manufactured with a mixture of expanded clay and recycled concrete aggregates. The composite mortars form a compressive layer over laminated wooden joists to form a single construction unit. To do so, full-scale flexural tests are conducted of the composite laminated wood-ecological mortar slabs with different types of mortar designs: reference mortar (MR), lightweight mortar dosed with recycled concrete aggregates (MLC), and lightweight mortar dosed with recycled mixed aggregates (MLM). The test results showed that the mortar forming the compression layer and the laminated wooden joists worked in unison and withstood a higher maximum failure load under flexion than the failure load of the wooden joists in isolation. Moreover, the laboratory test results were compared with the simulated values of the theoretical model, generated in accordance with the technical specifications for structural calculations contained in the Spanish building code, and with the results calculated by a computer software package. From the analysis of the results of the calculation methods and the full-scale laboratory test results, it was concluded that the safety margin yielded by the calculations validated the use of those methods on this type of composite slab. In this way, a strong mixed wood–mortar slab was designed, contributing little dead-load to the building structure and its manufacture with recycled aggregate, also contributes to the circular economy of construction materials.

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Analysis of the feasibility of the use of CDW as a low-environmental-impact aggregate in conglomerates

Cited by 38 publications

References 18 publications

Analysis and Economic Evaluation of the Use of Recycled Polyamide Powder in Masonry Mortars

Analysis and Economic Evaluation of the Use of Recycled Polyamide Powder in Masonry Mortars

Behavior resulting from fire in plasterboard with plastic cable waste aggregates

Mechanical Behavior of a Composite Lightweight Slab, Consisting of a Laminated Wooden Joist and Ecological Mortar

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