Replacement Of Natural Aggregates Research Articles

High-performance self-compacting concrete with recycled coarse aggregate: comprehensive systematic review on mix design parameters

ABSTRACT The technological advancements and environmental concerns enlighten the importance of incorporating more high-performance engineered materials in the construction sector. The partial replacement of natural coarse aggregates (NCA) with recycled coarse aggregates (RCA) in concrete has recently been a primary focus of worldwide researchers for sustainability in environmental aspects. The primary purpose of this review is to comprehend the effect of design parameters in determining the mechanical characteristics of high-performance self-compacting (HP-SCC) that include recycled coarse aggregates (RCA). Seven design parameters were extracted and considered in this review. It has been revealed that the design parameters of HP-SCC with RCA have a different effect on the mechanical characteristics of HP-SCC with various grades. In addition, the current research aims to promote environmental-friendly development and produce sustainable materials to improve mechanical-related characteristics in concrete in the absence of a precise evaluation technique. Artificial neural network (ANN) models have been implemented using the design parameters for predicting concrete mechanical properties based on three statistical indicators. The ANN-based model was attributed using these seven inputs of the literature with the help of sensitivity analysis for indicating the most critical design parameter HP-SCC.

Treated Waste Tire Using Cement Coating as Coarse Aggregate in the Production of Sustainable Green Concrete

Waste tire rubber is one of the most concerning environmental pollution issues. With the increasing demand for automobile production, the rate of waste tire generation has also increased. However, these tires often end up stockpiled and not properly disposed of. This non-biodegradable waste poses severe fire, environmental, and health risks. Due to the progressively severe environmental problems caused by the disposal of waste tires, the feasibility of using such elastic waste materials as an alternative to natural aggregates has become a research topic. The main objective of this research is to investigate the changes in the mechanical and durability properties of concrete with the inclusion of waste tire rubber at specific contents. A total of 80 cylinders measuring 100 mm × 200 mm were cast with waste tire aggregate as a partial replacement for natural coarse aggregate (5% and 10% by weight of natural coarse aggregate). A surface treatment of tire aggregate using a cement coating was performed to study its effect on concrete properties. This research indicates a noticeable reduction in the compressive and split tensile strength of concrete containing untreated waste tire rubber compared to normal concrete made with natural aggregates. However, an improvement was observed when the surface of tire aggregates was coated with cement grout. Additionally, it was noted that the slump value, water absorption, and porosity increased as the percentage of rubber increased. Nevertheless, unlike normal concrete, the failure pattern in tire-mixed concrete occurs gently and uniformly, indicating ductile behavior.

A study on the integrated implementation of supplementary cementitious material and coarse aggregate for sustainable concrete

This paper presents the investigation of energy efficacy, strength maturation, and environmental management of palm oil industrial waste materials, such as palm oil fuel ash (POFA) and oil palm shell (OPS). The industrial by-product POFA was used as partial, and the agro-based waste material OPS was employed as an absolute replacement of ordinary portland cement (OPC) and conventional natural coarse aggregate, respectively, in manufacturing sustainable lightweight concrete. The fresh concrete properties (workability and density), ultrasonic pulse velocity (UPV), compressive strength, water absorption, residual strength, thermal conductivity, and microstructural analysis have been investigated and reported. Four different concrete mixes with densities ranging from 1610 kg/m3 to 1935 kg/m3 were produced by replacing the OPC with POFA by a weight proportion of 0%, 10%, 30%, and 50%. Maximum compressive strength of 42.8 MPa was found at 365-day for 10% POFA based oil palm shell concrete (OPSC). The samples were exposed to selected peak temperatures (400 °C) to determine the residual strength at 28-, 56-, 90-, and 365-day. The UPV and compressive strength tests were performed for both heated and normal samples. The energy-saving status for POFA based OPSC was investigated by performing the thermal conductivity test at 365-day. The thermal conductivity of POFA based OPSC exerted lower values compared to that without POFA. The microstructure with the phase of developed fibrous C–S–H and pores inside the concrete were characterized and analyzed by scanning electron microscopy (SEM) images. The largest micro-cracks between coarse aggregates and cement paste were found in concretes containing 50% POFA, and the smallest one was for 10% POFA based OPSC. Considering the optimization in terms of compressive strength, thermal conductivity, residual compressive strength, and microstructural analysis, it is recommended that the inclusion of POFA in OPSC can be considered a structural grade concrete along with the thermal insulation.

Assessment of mechanical and durability properties of composite cement-based recycled aggregate concrete

The decade 2014–2024 is known as the sustainable decade, as a result of which there is a need to develop eco-friendly building materials and adopt sustainable construction practices. Utilizing larger proportions of industrial by-products reduces the carbon footprint on the environment caused by the cement manufacturing process. Also, the demand for natural aggregates is surging rapidly, hence recycled aggregates or recycled concrete coarse aggregates are being used as an alternative to natural aggregates. But there is a lack of studies based on the utilization of composite cement (fly ash and slag as blending materials) along with 100% recycled concrete aggregates. In the present study composite cement-based, recycled aggregate concrete is developed for varying water-cement ratios of 0.3 to 0.7 for 100% replacement of natural aggregates with recycled concrete coarse aggregates. These concretes were studied for mechanical properties and durability properties like water permeability, chloride ion permeability, corrosion resistance and resistance to carbonation. It is concluded from the current study that; the developed concrete consisting of 100% RCA and composite cement exhibits compressive strength between 25 MPa and 60 MPa for decreasing w/c from 0.7 to 0.3 respectively. Also, a well-designed mix with dense aggregate grading, ensures that the carbonation exhibited by this concrete is negligible and satisfies all the durability requirements. Hence it can be employed in the real-time construction of buildings.

Utilization of plastic waste as replacement of natural aggregates in sustainable concrete: effects on mechanical and durability properties.

The study presents the mechanical and durability properties of concrete made up of recycled-waste-polyethylene (PE) and waste-polyethylene-terephthalate (PET)-based aggregate as replacement of natural fine and coarse aggregate, respectively. For this purpose, compressive strength, sorptivity, water permeability, aggressive exposure in acid, base, marine and wastewater, impact resistance, abrasion loss including surface and Cantabro, gas permeability, rapid chloride penetration test (RCPT), elevated temperature and leachability test of microplastic were performed. The experimental works were performed for different volumetric replacement (0-40%) of natural fine and coarse aggregates by PE and PET made aggregate respectively for different curing periods. The experimental results revealed that the sorptivity of PE-based concrete was lowest. Water permeability coefficient signified that with the increase of percentage of PET water permeability increased. In case of aggressive exposure test, the percentage of residual mass and residual strength for all replacement was decreased with the increase in exposure period. Further, impact resistance test result signified that energy absorption increased with the increase of PE and PET percentages. Cantabro and surface abrasion weight loss showed similar trend. Carbonation depth was increased with increasing percentages of PE and PET signified strength decreased with increase of percentages of PE and PET when subjected in CO2. RCPT test results demonstrated that with increase of PE and PET percentages chloride ion penetrability was reducing. It is observed that below 100°C temperature, compressive strength of all mix proportions was not affected with elevated temperature. Moreover, the PET-based concrete showed no presence of microplastic in case of leachability test.

Engineering attributes of alkali-activated mortars containing ceramic tiles waste as aggregates replacement: Effect of high-volume fly ash inclusion

Fast depletion of the natural aggregates and an ever-increasing carbon footprint in environment has enforced humanity to take an immediate remedial measure. Meanwhile, the wastes generated from ceramic materials by various industries worldwide became responsible for growing landfill problems. Several alkali-activated mortars mortars containing ceramic tiles waste as natural aggregates replacement have been designed and evaluated to assess the effectiveness of such waste on the engineering characteristics, such as compressive strength, drying shrinkage, abrasion resistance and water absorption performance of the obtained mortars. The prepared mortars enclosed high volume Fly Ash (FA), Ceramic Tiles Waste (CTW) and Ground Blast Furnace Slag (GBFS). It has been observed that the use of 100% of CTW as fine aggregates replacement was shown to achieve strengths comparable to the control specimen, whereas the inclusion of high volume of FA contents as GBFS substitute in the proposed mix design was discerned to affect significantly on their early strength, thus enhanced the durability performance in term of reducing the total drying shrinkage. However, the results showed that the porosity and abrasion resistance are negatively affected due to increasing FA level. The grinding depth and waster absorption percentage of the mortars was found to increase with the increase of FA content as GBFS replacement.

Producing Sustainable Roller Compacted Concrete by Using Fine Recycled Concrete Aggregate

One-third of the total waste generated in the world is construction and demolition waste. Reducing the life cycle of building materials includes increasing their recycling and reuse by using recycled aggregates. By preventing, the need to open new aggregate quarries and reducing the amount of construction waste dumped into landfills, the use of recycled concrete aggregate in drum compacted concrete protects the environment. Four samples of PRCC were prepared for testing (compressive strength, tensile strength, flexural strength, density, water absorption, porosity) as the reference mix and (10, 15, and 20%) of fine recycled concrete aggregate as a partial replacement for fine natural aggregate by volume. The mix is designed according to (ACI 327-15) with the specified cylinder compressive strength (28 MPa). The results showed a decrease in mechanical properties with an increase in partial replacement compared to the reference mixture and an increase in water absorption and porosity at 28 days. This is because old cement mortar on the surfaces of fine recycled concrete aggregates leads to higher porosity and water absorption than fine natural aggregates. At 90 days, results improved slightly. This is due to the non-aqueous cement in the recycled fine concrete aggregate.

Utilization of a mixture of waste plastic materials and granite particles as a partial replacement of coarse aggregate in concrete blocks

Due to an increase in population, there is a rapid rise in industrialization and urbanization in the country which marshalled the way for infrastructure development which has resulted in heavy usage of natural resources such as Fine Aggregates (Sand), Coarse Aggregates, etc. which are non-renewable. In this paper, we discuss about a method for reusing the plastic wastes and as well as safeguarding the natural aggregates by incorporating them into concrete. It aims at finding out the optimum percentage replacement for natural coarse aggregate with a mixture of plastic and granite pieces coarse aggregate, which can give us the same or more strength and has the same amount of workability as compared to nominal concrete. In this paper, we have worked on the M20 grade of concrete moulds/blocks. Tests were carried out on fine aggregates, high density waste plastics, coarse aggregates, cement, and plastic-granite coarse aggregate to determine their physical properties. Cubes of sizes 0.15 m × 0.15 m × 0.15 m were casted and were tested for 7-days & 28-days of compressive strength.

Rubberized Geopolymer Mortar and Concrete: A Comprehensive Review.

In many crucial structural applications, a material’s ability to withstand impact is of the utmost importance. The use of crumb rubber particles as a partial replacement of natural aggregates forms rubberized geopolymer concrete (RuGPC), which is found to have great impact resistance and energy absorption capacity. Geopolymer paste and natural aggregates alone are weak in handling the impact loads. The field of Civil engineering has been looking into ways for the last few years to use solid waste and ecologically friendly raw materials as components of concrete in building to embrace sustainability. Greenhouse gas emissions from cement manufacturing and the depletion of natural aggregates are two major issues the construction industry is currently experiencing. RuGPC, which combines the benefits of geopolymer concrete (GPC) and rubberized concrete to create a practical, sustainable building material, has been a hot topic for the past few years. In this paper, the fresh properties, strength and durability characteristics, mixing procedure and curing properties, dynamic and impact properties, microstructures and thermal properties of rubberized geopolymer mortar and concrete are comprehensively reviewed.

The Reuse of Basic Oxygen Furnace Slag as Concrete Aggregate to Achieve Sustainable Development: Characteristics and Limitations

Basic oxygen furnace slag is considered a potential material for the replacement of natural aggregate in Portland cement concrete due to its similar physical characteristics. Therefore, in the present work, the slag was analyzed by Nitrogen sorption porosimetry, elemental analysis, mineralogical analysis, and volume stability. On the other hand, concrete mixtures were manufactured with basic oxygen furnace (BOF) slag aggregates and characterized mechanically and morphologically. The results showed superior compressive strength due to interfacial improvements in the slag aggregate. Statistically, there was no differentiation between the reference concrete and the slag concrete mixtures for tensile strength. Additionally, due to the porosity and low stiffness presented by the slag, the concrete elastic modulus showed a slight decrease. The replacement of sand with BOF slag as fine aggregate in Portland cement concrete presents itself as a sustainable alternative for the elimination and valorization of this environmental liability.

Utilization of agricultural, industrial waste and nanosilica as replacement for cementitious material and natural aggregates – Mechanical, microstructural and durability characteristics assessment

This study examines the effect of rice husk ash (RHA) and nanosilica, and ground granular blast furnace slag (GGBS) on concrete mechanical and durability properties. The cement had been partially replaced with nanosilica and RHA having substitution percentages up to 6% and 10% respectively whereas the sand had been partially replaced by GGBS at 20% for all mixes. A water-to-cementitious materials ratio of 0.38 and a sand-to-cementitious materials ratio of 2.04 were used to cast eight different concrete mixes. The nanosilica used in the present research possessed some favorable effects such as rich fineness, higher surface area and greater reactivity which signified one of the best cement replacement materials. Both the durability and strength of concrete specimens possessing nanosilica, RHA and GGBS was evaluated using in-elastic neutron scattering, SEM image, piezoresistive test, split tensile strength, flexural strength and compressive strength test. Concrete specimens were also subjected to chloride penetration and water absorption to examine the impact of replacement materials on the concrete's durability attributes. Concrete performance was increased by the ternary blending of concrete because of the active participation of nanosilica in durability and strength at early ages, both RHA and GGBS played an important role in improving packing density. It was found that as the percentage of cement replaced with nanosilica increases, the durability of concrete also significantly increases. But the optimum strength parameter was found when 4% of cement was replaced by the nanosilica effectively. The proposed ternary mix may be eco-friendly by saving cement and enhancing strength and durability effectively.

Recycling prestressed concrete pile waste to produce green self-compacting concrete

Construction and demolition waste is produced in large quantities and constitutes an overlooked resource with significant potential for recycling and reuse. In fact, recycled concrete aggregate (RCA) has a high resource value, although it is also the case that RCA has characteristics that complicate its reuse. This research study looks at the efficacy of producing green self-compacting concrete (SCC) using uniform in-situ prestressed concrete pile waste (RCA) as a replacement for natural aggregate and fly ash (FA) as a replacement for Type 1 Portland cement (OPC). In accordance with the European standard, the workability characteristics of the SCC mixtures were assessed using slump flow, T500 time, J-ring flow, L-box, and V-funnel tests. The hardened properties of compressive strength at 7, 28, and 91 days as well as pulse velocity, Young's modulus, and surface resistivity were also tested. Based on this study, it is possible to produce SCC with both RCA and FA that has better workability and hardened properties than does RCA and also to reduce the negative effects of the latter. SCC produced without coarse natural aggregates showed compressive strength above 50 MPa and maximum compressive strength above 74 MPa at 91 days. SCC produced in this way is, therefore, viable for industrial use.

Compressive and splitting tensile impact properties of rubberised one-part alkali-activated concrete

This paper presents an experimental assessment of the compressive and splitting tensile properties of rubberised one-part alkali-activated concrete under quasi-static and low-velocity impact loading. An optimised mix design, employing blast furnace slag and fly ash as precursors and anhydrous sodium metasilicate as a solid activator, is used as a reference. Rubber contents of up to 60% volumetric replacement of total natural aggregates are considered. Quasi-static tests are performed using servo-hydraulic machines, whilst the impact tests are performed in an instrumented drop-weight loading rig. Digital image correlation is used to get displacement measurements under both quasi-static and impact loading conditions. Three impact velocities of 5, 10, and 15 m/s are considered, giving rise to strain-rates in the range of 3–270 s−1. The quasi-static results show shape- and size-dependency and characteristically lower compressive and splitting tensile strengths with higher rubber content. The dynamic properties are notably influenced by the rubber content, with a higher ratio resulting in greater impact duration under compressive loading, reduced peak compressive strength, and reduced peak splitting tensile strength. The shape of the stress-strain response under compressive loading changes with rubber addition, showing two major peaks as opposed to a single peak for the non-rubberised specimens. The dynamic mechanical properties are also strain-rate dependent, exhibiting an increase with higher strain-rates. The rubberised specimens exhibit higher strain-rate sensitivity in splitting tension than compression, signified by higher dynamic increase factors for a given strain-rate and lower critical transition strain-rates. A higher rubber content in the mix also result in reduced critical transition strain-rates for the compressive strength, axial crushing strain, and splitting tensile strength. Based on the results of this study, analytical expressions are provided for predicting the dynamic increase factors for the compressive strength, axial crushing strain, elastic modulus, and splitting tensile strength.

Experimental investigation of construction & demolition waste in bituminous concrete

India is a developing nation, and developing nations need a lot of construction. In 2022, the construction industry used 2.05 billion tonnes of coarse materials. To meet the need for houses and roads, the 12th Five Year Plan forecasts an additional 1 billion tonnes of concrete by 2027. In road mix ratios, coarse aggregates range from 2 to 10 parts per unit of cement. The demand for coarse aggregate in 2027 will range from 2.1 to 10.3 billion tonnes. In construction, aggregate is a useful building material. Since building and demolition debris make up a significant portion of landfill garbage, it is important to establish strategies to ensure that it is used effectively. The present study has made an attempt to use recycled aggregates as coarse aggregates and concrete debris as fine aggregates as a partial replacement for natural aggregate. The experimentation includes the characterization of materials, volumetric analysis, marshal stability, flow value, indirect tensile strength, and tensile strength ratio. 20% replacement of natural aggregates with construction and demolished waste has been proposed in the concluding remarks.

Influence of waste refractory brick on the destructive and non-destructive properties of sustainable eco-friendly concrete

Concrete is one of the most popularly used structural materials in the construction. It is a composite mixture of cement, fine aggregate, coarse aggregate, water, and with or without admixture. For concrete production, large amounts of natural aggregates are being consumed and as a result, the environment is facing severe challenges. The imbalance in the ecosystem is creating immense complications in the environment due to the illegal mining of aggregate from natural resources. Under these circumstances, researchers are finding suitable alternatives to preserve natural resources and raise environmental awareness and consequently the concept of sustainability is introduced. Depending on the level of difficulties, the utilization of waste materials may be exercised for the preparation of sustainable concrete that are economically and environmentally acceptable. Refractory Bricks turn out to be such a waste after a few cyclic usages in various thermal industries and may be utilized in concrete. In this present experimental work, the utilization of waste refractory bricks are proposed for the partial/total replacement of natural fine aggregate at 10, 20, 30, 40, 50, 70, and 100% levels by crushing it into fine particles. In this study, experiments are mainly divided into two parts, one is non-destructive tests and others are destructive tests. In non-destructive section, the prediction of compressive strength by Rebound Hammer has been performed. Subsequently, destructive tests, like Compression test, Flexural test, and Split Tensile test have been performed to check the mechanical properties of the concrete specimens. From the compression and split tensile test 20% replacement level provided the optimum result. The specimen with 30% replacement presented the best Flexural Strength. All the test results of sustainable concrete specimens are being compared with conventional concrete to check the enrichment or retrenchment of properties of concrete specimens with the incorporation of waste refractory bricks.

Study on green concrete replacing natural fine and coarse aggregate by plastic waste – An experimental and machine learning approach

One of the most universally used materials in construction industries is concrete because of its accessibility, affordability, extended lifespan and resistance to damage against unfavourable weather conditions. However, there is a massive depletion of valuable natural resources for the concrete production. Further, plastic consumption as well as waste generation is increasing day by day which is very much challenging to be managed as it is non-biodegradable and creates various environmental pollution. Thus, the usage of plastic waste as a fractional substitution of natural aggregates in construction industry may mitigate the problems. For the present study, nine concrete mixtures of M30 grade concrete containing recycled plastic waste polyethylene (RPE) and plastic waste polyethylene-terephthalate (WPET) were prepared as a fractional volumetric replacement for both natural coarse aggregates (NCA) and fine aggregates (NFA). The replacement levels were 0%, 5 %, 10%, 15%, 20%, 25%, 30%, 35% and 40% keeping constant the water-cement ratio (0.37).The usage of waste plastic aggregates for preparation of concrete were assessed through different fresh and hardened properties like slump, dry density, compressive strength (CS), flexural strength (FS), split tensile strength (STS) and ultrasonic pulse velocity. The test results corroborates that the slump increased with higher percentage replacement of waste plastic aggregate (PA) in concrete. Further, incorporation of WPET and RPE in concrete reduced the dry density by 10.59 % at 40% mix proportion. It is to be mentioned that, the CS decreases with with increase of partial replacement of natural aggregate with waste PA. The ultrasonic pulse velocity (UPV) also decreased with increase of the PA. The test result also depicted that up to 5% replacement the STS value is almost constant, after that it reduces. Further, in case of FS test, the replacement with waste PA concrete by 10%, the FS improved to 19.91%. Furthermore, the data prediction models of slump, CS, FS and STS were developed by artificial neural network. Moreover, the optimization of mix proportion was conducted by factor response optimizer with composite desirability of 0.65.

Microstructural characteristics of iron-steel slag concrete: A brief review

The flexibility in the production of concrete permits the incorporation of numerous industrial by-products as a feasible replacement for conventional natural ingredients. Generally, the physicochemical characteristics of the industrial by-products result in variations in the microstructure of concrete. Several petrographic techniques have been used in concrete to understand the alternation in the microstructure of the material instigated by the addition of different industrial by-products. Various petrographic techniques, such as scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS), have been successfully implemented in the field of research in the last decades for microstructural characterization. Currently, the usage of iron-steel slag in concrete has opened an extensive range of potentials for understanding the microstructural behaviour of iron-steel slag as Portland cement (PC), natural coarse and natural fine aggregates (NCA & NFA) replacement in concrete. This paper briefly reviews some of the microstructural features indicating the physical (pore structure, interfacial transition zone (ITZ), shape, etc.) and chemical characteristics of iron-steel slag-based concrete. The effects of different variables, such as slag content, curing conditions, and mixing techniques, on the microstructure are also examined. The microstructure evaluation reveals the complex behaviour of iron-steel slag in concrete, as in some cases its utilization has proved to be beneficial. On the other hand, its presence beyond a certain limit degrades the microstructural behaviour of concretes. This review highlights the general trends in understanding the variation in compressive strength as well as microstructural characteristics over the range of replacement of slag in concrete as a potential replacement of cement, fine and coarse aggregate.

Surface Cement Concrete with Reclaimed Asphalt

This research concerns the possibility of using reclaimed asphalt pavement as a substitute for conventional aggregate in cement concrete mixtures for roads and airfield applications. The advantages of using reclaimed asphalt pavement as a replacement for natural aggregates are presented. Economic and environmental aspects are indicated, including the reduction in the consumption of natural non-renewable sources of mineral aggregates, as well as reduction in transport costs and emissions of harmful greenhouse gases. The consistency of this recycled material with the idea of sustainable development in the construction industry is emphasized. The test results of the used reclaimed asphalt and the assessment of the effect of its amount on the change in mechanical, physical and strength parameters of cement concrete are presented. It has been shown that the addition of reclaimed concrete reduces selected parameters of cement concrete, but it is possible to use it in structures with less traffic load, taking into account the sustainable development policy.

Investigation on Partial Replacement of Various Waste Materials as Coarse Aggregate in Concrete

Abstract: The reuse of ceramic waste and iron slag waste as a substitute for coarse aggregate in concrete has been investigated. The current option for disposal of ceramic waste is landfill and this waste is of three types, namely ceramic tiles, clay bricks, flower potspots. Ceramic tiles were obtained from construction and demolition sites, which caused environmental pollution utilizationation of crushed tile as a coarse aggregate in concrete would also have a positive effect on the economy. And slag is considered a third-class hazardous waste that requires a large place for dumping. To transform the slag into an environmentally friendly resource and save the environment from pollution, the possibility of using slag as coarse aggregate cannot be overlooked. In the present study, ceramic tile waste and iron slag were used in concrete as a replacement for natural coarse aggregate with 0%, 10%, 50%, and 100% of the substitution, and M25 grade concrete was used. The concrete modulus was cast and tested for compressive strength after a curing period of 15 and 21 days.

Influence of Recycled Plastic Incorporation as Coarse Aggregates on Concrete Properties

Plastic waste has increased significantly in recent years as a result of fast population growth and urbanization. Studies on the incorporation of plastic aggregates as a substitution for natural aggregates in concrete are needed to successfully reduce both adverse environmental impact and the depletion of natural resources. The objective of this research was to investigate the use of plastic as a partial substitution for natural coarse aggregates in concrete. For this purpose, seven concrete mixes were produced using 0, 10, 15, and 20% plastic coarse aggregates to replace natural aggregates with and without silica fume of similar replacement levels with cement. Fresh density, workability, compressive strength, splitting tensile strength, stress–strain response, and Poisson’s ratio were observed to study the fresh as well as hardened properties of concrete mixtures. Indoor and outdoor thermal performance and thermo-gravimetric analysis were also investigated. The results revealed that the plastic aggregates’ incorporation improved the workability of concrete; however, it negatively influenced the fresh density and mechanical properties of concrete. The compressive and tensile strengths of plastic aggregate concrete without silica fume were reduced by 32 and 33%, respectively. The reduction in strength could be associated with the smooth texture of plastic aggregates. The addition of silica fume with plastic aggregates resulted in denser concrete and improved mechanical properties. In general, the performance of plastic aggregates as a partial replacement for natural aggregates was satisfactory, which suggests their possible use to produce eco-friendlier concrete.