Use of Recycled Concrete Aggregates in Production of Green Cement-Based Concrete Composites: A Review

Makul, Natt; Fediuk, Roman; Amran, Mugahed; Zeyad, Abdullah M.; Murali, G.; Vatin, Nikolai; Klyuev, Sergey; Ozbakkaloglu, Togay; Vasilev, Yuriy

doi:10.3390/cryst11030232

Cited by 84 publications

(38 citation statements)

References 166 publications

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“…The optimum compressive strength was 93 MPa [ 189 ]. In a previous study [ 241 ], recycled coarse aggregate (RCA) obtained from crushed structural concrete beams and clay was utilized in FA-based AAM to produce concrete with adequate mechanical characteristics [ 197 , 241 , 242 , 243 ]. It was reported that AAM with RCA developed a less compressive strengths of up to 10.3 MPa compared to that with natural coarse aggregates [ 241 ].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Fly Ash-Based Eco-Efficient Concretes: A Comprehensive Review of the Short-Term Properties

et al. 2021

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Development of sustainable concrete as an alternative to conventional concrete helps in reducing carbon dioxide footprint associated with the use of cement and disposal of waste materials in landfill. One way to achieve that is the use of fly ash (FA) as an alternative to ordinary Portland cement (OPC) because FA is a pozzolanic material and has a high amount of alumina and silica content. Because of its excellent mechanical properties, several studies have been conducted to investigate the use of alkali-activated FA-based concrete as an alternative to conventional concrete. FA, as an industrial by-product, occupies land, thereby causing environmental pollution and health problems. FA-based concrete has numerous advantages, such as it has early strength gaining, it uses low natural resources, and it can be configurated into different structural elements. This study initially presents a review of the classifications, sources, chemical composition, curing regimes and clean production of FA. Then, physical, fresh, and mechanical properties of FA-based concretes are studied. This review helps in better understanding of the behavior of FA-based concrete as a sustainable and eco-friendly material used in construction and building industries.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Fly Ash-Based Eco-Efficient Concretes: A Comprehensive Review of the Short-Term Properties

et al. 2021

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“…Concrete is an extraordinary composite material, widely used in the construction industry. It consists of a mix of fine and coarse aggregates bonded together with cement paste [1,2]. Evaluating the performance of cement is a very challenging task because it changes significantly when it comes into contact with water [3].…”

Section: Introductionmentioning

confidence: 99%

“…From this equation, by using geotechnical equipment under static conditions, the inherent forces likes cohesion and friction occur due to the abrasion of particles. The formula used to measure the cohesive force is given by Equation (1).…”

Section: Introductionmentioning

confidence: 99%

Rheological Behavior and Strength Characteristics of Cement Paste and Mortar with Fly Ash and GGBS Admixtures

et al. 2021

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A cement paste or mortar is composed of a mineral skeleton with micron to millimeter-sized grains, surrounded by water filaments. The cohesion or shear resistance in the cement paste and mortar is caused by capillary forces of action. In the case of mortar mixes, there is friction between the particles. Therefore, the mortar mixture shows both friction between particles and cohesion, while the paste shows only cohesion, and the friction between particles is negligible. The property of the cement paste is greatly influenced by the rheological characteristics like cohesion and internal angle friction. It is also interesting that when studying the rheology of fresh concrete, the rheological behavior of cement paste and mortar has direct applicability. In this paper, the rheological characteristics of cement paste and mortar with and without mineral admixtures, that is, fly ash and ground granulated blast-furnace slag (GGBS), were studied. A cement mortar mix with a cement-to-sand ratio of 1:3 was investigated, including fly ash replacement from 10% to 40%, and GGBS from 10% to 70% of the weight of the cement. A suitable blend of fly ash, GGBS, and ordinary Portland cement (OPC) was also selected to determine rheological parameters. For mortar mixtures, the flow table was conducted for workability studies. The flexural and split tensile strength tests were conducted on various mortar mixtures for different curing times. The results indicate that in the presence of a mineral mixture of fly ash and GGBS, the rheological behavior of paste and mortar is similar. Compared with OPC-GGBS-based mixtures, both cement with fly ash and ternary mixtures show less shear resistance or impact resistance. The rheological behavior of the mortar also matches the rheological behavior in the flow table test. Therefore, it is easy to use the vane shear test equipment to conduct cohesion studies to understand the properties of cement paste and mortar using mineral admixtures. The strength results show that the long-term strength of GGBS-based mixtures and ternary mixed mixtures is better than that of fly-ash-based mixtures. For all mixtures, the strength characteristics are greatest at a w/b ratio of 0.6.

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“…For this, the absorption and insulation of sound were checked at different frequencies on rubber concrete. Concrete specimens were meant to replace the 0 to 100% coarse aggregate with two recycled tires rubber aggregates, up to 60% of the overall concrete volume [124][125][126][127][128]. Furthermore, concrete panels were cast with various surface finishes (rough and smooth surface) to evaluate the influence of the external texture and the direct contact of rubber [129].…”

Section: Cellular Concretementioning

confidence: 99%

Sound-Absorbing Acoustic Concretes: A Review

et al. 2021

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Noise is continuously treated as an annoyance to humans and indeed commotion contamination shows up within the environment, causing inconvenience. This is likewise interesting to the engineering tactic that inclines to develop this noise proliferation. The basics of the sound-retaining proliferation, sound-absorbing properties, and its variables were rarely considered by previous researchers. Thus, the acoustic performance and sound insulation of constructions have gained significance over the last five decades due to the trend for accommodating inner-city flat and multi-story residential building condominiums. Due to this dilemma, the proliferation of high-driven entertaining schemes has engaged extraordinary demands on building for its acoustic performance. Yet, construction industries worldwide have started to mainly use sound-absorbing concrete to reduce the frequency of sounds in opened-and-closed areas and increase sound insulation. As reported, the concrete acoustic properties generally rely on its density, exhibiting that the lighter ones, such as cellular concrete, will absorb more sound than high-density concretes. However, this paper has an objective to afford a wide-ranging review of sound-absorbing acoustic concretes, including the measurement techniques and insulation characteristics of building materials and the sound absorption properties of construction materials. It is also intended to extensively review to provide insights into the possible use of a typical sound-absorbing acoustic concrete in today’s building industry to enhance housing occupants’ efficiency, comfort, well-being, and safety.

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Use of Recycled Concrete Aggregates in Production of Green Cement-Based Concrete Composites: A Review

Cited by 84 publications

References 166 publications

Fly Ash-Based Eco-Efficient Concretes: A Comprehensive Review of the Short-Term Properties

Fly Ash-Based Eco-Efficient Concretes: A Comprehensive Review of the Short-Term Properties

Rheological Behavior and Strength Characteristics of Cement Paste and Mortar with Fly Ash and GGBS Admixtures

Sound-Absorbing Acoustic Concretes: A Review

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