Recycled Aggregate: A Viable Solution for Sustainable Concrete Production

Marvila, Markssuel Teixeira; Matos, Paulo Ricardo de; Rodríguez, Erich D.; Monteiro, Sérgio Neves; Azevedo, Afonso Rangel Garcez de

doi:10.3390/ma15155276

Cited by 33 publications

(19 citation statements)

References 92 publications

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“…This causes health difficulties for residents, a decrease in drinking water quality, and increased electricity use for fans and air conditioning. One of the most visible effects of global warming is the growing frequency of natural disasters such as earthquakes, tsunamis, floods, and tornadoes (Marvila et al, 2022). The list is extensive, but in the case of concrete, floods should be our primary concern.…”

Section: 4mentioning

confidence: 99%

Analyzing the Use of Recycled Materials in Sustainable Concrete in the GCC Countries

Alsalama

Damdelen²

2022

Sustainability

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The modern construction industry is based on the development of concrete structures and concrete is the most commonly used building material for the construction industry. Concrete manufacturing involves dev elopement of a mixture containing different natural resources like stone, clay, sand, water, and cement. These natural resources are extracted and transported to the construction site to create concrete (Ahmad et al., 2022). On the other side, concrete waste poses a significant environmental and economic challenge for the global construction industry. The present study is based on analyzing the use of recycled material for the development of sustainable concrete mix. Recycled materials involve the recycling of construction waste that provides the best alternative for natural resources and helps to prevent the environment. The present study is based on qualitative data analysis and surveys to highlight the usage of recycled materials to develop sustainable concrete. The survey results demonstrate that recycled materials are significantly important for the development of concrete mix and it is cost-effective and also protect the environment. The present research provides a deep insight into the usage of recycled materials for sustainable concrete manufacturing.

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Section: 4mentioning

confidence: 99%

Analyzing the Use of Recycled Materials in Sustainable Concrete in the GCC Countries

Alsalama

Damdelen²

2022

Sustainability

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“…The main novelties of the research are related to the development of an experimental program that looks for the effect of the granulometry of the sands in the main mortar properties. Marvila et al [ 23 ] carried out bibliographical research on aggregates in mortar, developing a bibliometric study highlighted in Figure 1 . The results obtained were extracted from the Scopus database based on articles published between 2013 and 2022, using the keywords recycled; aggregate; concrete (or mortar); and construction.…”

Section: Introductionmentioning

confidence: 99%

Effects of Particle Size Distribution of Standard Sands on the Physical-Mechanical Properties of Mortars

et al. 2023

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Obtained natural sands can present different particle size distributions (PSD), although they have the same mineralogical origin. These differences directly influence the physical and mechanical behavior of mortars and, therefore, the performance of mortar and ceramic renderings. Standardizing the particle size of sands based on pre-established requirements in normative standards (NBR 7214 or ASTM C778) is one way to minimize these effects. However, these standards do not consider the optimization of the granular skeleton through the analysis of bulk density and PSD, which may be insufficient to obtain satisfactory results. Therefore, this paper analyzes the effects of using different particle size ranges on the physical and mechanical behavior of cement and hydrated lime mortars. The properties of consistency index, bulk density, air content, capillary water absorption, water absorption by immersion, flexural strength, compressive strength, and dynamic modulus of elasticity were evaluated. For this purpose, standardized sands of the same mineralogical origin were made with different particle size ranges, being: (i) standardized sand constituted by 25% of coarse and fine fractions (S25-control), (ii) standardized sand constituted by 30% of coarse fraction and 20% of fine fraction (S30-20), and (iii) standardized sand composed by 40% of coarse fraction, and 10% of fine fraction (S40-10), respectively. The results indicated that variations in the particle size composition of the standardized sands are necessary to obtain mixtures with higher compactness and, therefore, mortars with better physical and mechanical performance. Thus, the dosage of the particle size fractions of standardized sand should consider the optimization of the granular skeleton, being the unit mass and the granulometric composition as important parameters to meet this premise.

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“…The strength of recycled aggregates (RCA) is less than that of natural aggregate because it has hardened cement paste on its surface, a higher porosity, and a water absorption of three to five times that of natural aggregate [14,15]. Adding RCA to concrete reduces its mechanical properties and shortens its lifespan [16][17][18][19][20]. One possible alternative to the traditional method of disposing of scrap rubber and the massive volumes of demolition waste is to recycle crumb rubber and RCA in concrete production as partial substitutes for fine and coarse aggregates, respectively.…”

Section: Introductionmentioning

confidence: 99%

Predicting the Compressive Strength of Concrete Containing Crumb Rubber and Recycled Aggregate Using Response Surface Methodology

Dahish¹

2023

GEOMATE

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The reuse of construction demolition waste and rubber waste has been a key challenge in recent decades due to the decrease in natural material resources and the huge amounts of abundantly available waste. When recycled aggregates (RCA) and crumb rubber (RBR) are used together as partial substitutions for coarse and fine aggregates, respectively, in concrete, it leads to a decrease in the compressive strength when compared to natural aggregate concrete, so it is needed to construct models that can predict the strength before using them. In this paper, response surface methodology was utilized to develop predictive models for the influence of the combined incorporation of RCA and RBR in concrete on the compressive strength. The predictions were based on the results of 100 various concrete mixes obtained from previous works and from the literature. The variables included w/c ratio (0.39 and 0.5), RBR replacement (0% to 40%), levels of RCA replacement (0% to 100%), and durations of 7 and 28 days. The compressive strength was taken as a response. All models and their terms were validated using various statistical tests. The results showed that linear and quadratic models and their terms were significant, and can be utilized for the prediction of the compressive strength with less error.

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Recycled Aggregate: A Viable Solution for Sustainable Concrete Production

Cited by 33 publications

References 92 publications

Analyzing the Use of Recycled Materials in Sustainable Concrete in the GCC Countries

Analyzing the Use of Recycled Materials in Sustainable Concrete in the GCC Countries

Effects of Particle Size Distribution of Standard Sands on the Physical-Mechanical Properties of Mortars

Predicting the Compressive Strength of Concrete Containing Crumb Rubber and Recycled Aggregate Using Response Surface Methodology

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