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Recycling concrete &building rubble is not only able to bring profit to investors, but also good for environment protection.
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Recycled Concrete Aggregates: A Review. This paper discusses the properties of RCA, the effects of RCA use on concrete material properties, and the large scale impact of RCA on structural members. The review study yielded the following findings in regards to concrete material properties: (1) replacing NA in concrete with RCA …
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For making recycled coarse aggregate, concrete from a nearby site was used in a testing machine and then by hand with hammers. The broken aggregates are then put through 20 mm, 16 mm, 10 mm, and 4.75 mm sieves, and the aggregates that stay in the 16 mm, 10 mm, and 4.75 mm sieves are used as recycled coarse aggregates that …
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Comprehensive studies have also been conducted to use biochar as aggregate in cement to produce concrete (Zhang et al., 2022). It is found that biochar in concrete promotes the cement hydration process, facilitating the formation of calcium-silicate-hydrate (C-S-H) gel and enhancing the polymerisation degree of C-S-H gel via …
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The inclusion of fiber in concrete influenced the mobility of concrete in the fresh state by acting as a barrier to the movement of coarse aggregate. It was observed that the concrete with an FA/CA ratio above 0.8 showed better flowability in the fresh state, whilst an above 0.9 FA/CA ratio requires excessive superplasticizer to maintain the ...
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This has been proved through a number of different studies. We have found that the following material is an acceptable alternative to concrete after consulting a number of scholarly journals and articles. Producing ceramic tiles results in waste, some of which can be recycled into either fine or coarse aggregate [16]. The project that has ...
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Application of Aggregates from Construction and Demolition Wastes in Concrete: Review. by. Hua Luo. 1, José Aguiar. 2, Xiaoqi Wan. 1, Yinggu Wang. 1, …
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the recycled aggregate concrete is almost 85% and 80% of natural aggregate concrete. Amn on.et.al (2002), concrete having a 28 -day compressive strength of 28 MPa was crushed at ages 1, 3 and 28 days to serve as a source of aggregate for new concrete, simulating the situation prevailing in precast concrete plants. The properties of the
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Poon CS, Chan D (2006) Feasible use of recycled concrete aggregates and crushed clay brick as unbound road sub-base. Constr Build Mater 20(8):578–585. Article Google Scholar De Brito J, Saikia N (2012) Recycled aggregate in concrete: use of industrial, construction and demolition waste.
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Extensive use of cement in the construction industry increases CO2 emissions and has a negative impact on the environment. In this work, recycled coarse aggregate (RCA) from construction and demolition wastes (C&DW) was used to fabricate sustainable pervious concrete (PC). In order to mitigate the environmental hazards of …
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Locally available CS were procured, and the shells were dried for 20 days and crushed with a rammer to achieve aggregates of desired small sizes (Fig. 1 a). 20 mm downsize coconut shells were sieved from the crushed mass of shells and were used for the study (Fig. 1 b).Before mixing the coconut shells in concrete the shells were pre-soaked …
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Concrete has become a widely used building material, with the global concrete consumption estimated to be around 14 billion cubic meters in 2020, according to statistics from the Global Cement and Concrete Association (GCCA) [].Aggregates in concrete are an essential component, constituting approximately 75% of the total …
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Similarly, Heeralal et al. [14] found negative effects on concrete when using RA compared to NA. Quiasrawi and Marie [15] discovered that concrete using aggregate that had been recycled twice (2nd generation) had greater properties compared to concrete using aggregate that had only been recycled once (1st generation).
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In recent years, scholars around the world have worked on improving recycle aggregates in concrete and broadening the scope of applications of recycled …
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1. Introduction. Generally, concrete containing around 65–85% of its volume by aggregate. Meaningful that the properties of concrete are mainly dependent on the quality and type of aggregate [1].It is completely known that aggregate is an inactive material, but it is actually inactive due to its physical and limited chemical properties that …
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Upon analysis of the physical–chemical and mechanical properties, a replacement ratio of RAs of 50% was suggested, considering two factors: (1) the highest …
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Li, X. Recycling and reuse of waste concrete in China: Part I. Material behaviour of recycled aggregate concrete. Resour. Conserv. Recycl. 2008, 53, 36–44. [Google Scholar] Smith, J.T. Recycled Concrete Aggregate–A Viable Aggregate Source for Concrete Pavements.
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Youm KS, Moon J, Cho JY, Kim JJ (2016) Experimental study on strength and durability of lightweight aggregate concrete containing silica fume. Constr Build Mater 114:517–527. Article Google Scholar Chandra S, Berntsson L (2002) Lightweight aggregate concrete science, technology and applications.
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Experimental work was carried out to study the effect of using steel slag (SS) and recycled concrete aggregate (RCA) as replacements for the natural aggregate in concrete. Waste materials, such as SS, which is a by-product generated during the production of steel and concrete rubble, which is produced by demolition activities, are …
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These alternative fine aggregate (AFA)/manufactured sand (MS) are generally produced from natural sources or any other sources like old concrete, rocks, industrial wastes after processing using thermal, mechanical and chemical separation, washing, crushing and scrubbing (Dash et al., 2016).
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In this paper, a comprehensive literature review was conducted on the utilization of recycled concrete aggregate (RCA), which is the dominant construction …
DetailsDemands for a more sustainable concrete production with reduced waste streams and lower carbon footprint has introduced new solutions that transform waste …
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2 State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China. * Correspondence: [email protected]. Abstract: Steel slag is a solid waste ...
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DOI: 10.1007/s42768-023-00157-z Corpus ID: 260851468; Performance studies on recycled aggregate concrete with treated recycled aggregates @article{Ramalingam2023PerformanceSO, title={Performance studies on recycled aggregate concrete with treated recycled aggregates}, author={Malathy Ramalingam …
DetailsIntroduction. Concrete forms the backbone of modern society, but its massive production poses fundamental and compounding sustainability challenges: climate change and destructive resource extraction. 1 The underlying cause of these challenges lies in the constituents of concrete. Concrete is composed primarily of cement, (fine and …
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Special Issue Information. Dear Colleagues, Aggregate concrete plays a very important role in both underground engineering support and ground building structures. Aggregate concrete is one of the most important civil engineering materials. It is made up of cementitious materials, aggregates, water, and admixtures in a certain proportion.
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The articles collected in this review are mainly from Science Direct, web of Science, Google Scholar, Scopus, and other databases according to the keywords construction and demolition waste, recycled aggregates, recycled aggregate concrete, environmental impacts, and through an objective evaluation of the important references …
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1. Introduction. Concrete is the second most used material by volume on Earth. Portland cement is the main binder of concrete, and its production (estimated at 4.3 bi ton/year) accounts for about 8% of the global CO 2 emission [].Besides the CO 2 emission released by cement production, large amounts of sand and gravel are extracted …
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2. Impermeability. Impermeability is a characteristic of the durability of concrete and is closely related to other durability characteristics. For example, water-soluble chloride ions, CO 2, and sulfate can enter concrete, or other external factors can cause damage to the concrete, making the service life of concrete greatly affected and …
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When utilized in concrete (about half of current production of aggregates), compositional aspects of aggregate source rocks are of utmost importance specifically due to unwanted deleterious reactions of certain mineral phases in highly alkaline …
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Google Scholar [6] Hannawi K, Kamali-Bernard S and Prince W 2010 Physical and mechanical properties of mortars containing PET and PC waste aggregates Waste Management 30 2312-2320. Crossref Google Scholar [7] Poon C S, Kou S C and Lam L 2002 Use of recycled aggregates in molded concrete bricks and blocks Construction …
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International Journal of Concrete Structures and Materials 2024 18 :33. Correction Published on: 8 April 2024. The original article was published in International Journal of Concrete Structures and Materials 2023 17 :65. Full Text.
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Kou SC, Poon CS (2010) Properties of concrete prepared with PVA-impregnated recycled concrete aggregates. Cement Concr Compos 32(8):649–654. Article Google Scholar Li W, Long C, Tam VW, Poon CS, Hui Duan W (2017) Effects of nano-particles on failure process and microstructural properties of recycled aggregate …
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According to Table 2, 'use of supplementary cementitious materials' is the most emphasized factor, following 'selling price of recycled aggregate'. Cement is one of the most expensive components in concrete and reducing the amount of cement could significantly impact the price of recycled concrete [ 73 ].
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Concrete is 'a composite material consisting of a medium of binding in which fragments or particles of aggregates are embedded' within the binder. Thus, the concrete's definition can be simply interpreted as [1]. (1-1) Concrete = filler + binder. In general, concrete is the main building material utilised worldwide.
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This paper aims to investigate the possibility of utilizing steel slags produced in Croatian plants as a concrete aggregate. Aggregate properties were determined on coarse slag fractions (4–8, 8–16 mm) according to the relevant European Standards. Considering the obtained results, slags were specified in accordance with the classes as …
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The main objectives of the experimental program were to (i) investigate variability of recycled aggregate properties and their impact on concrete production and …
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Concrete with a high content of PET plastic waste aggregate (40% and 50% volumetric replacement to natural coarse aggregate) can be utilized in structural insulation lightweight concrete members. Tuladhar and Yin (2019) studied the possibility of producing lightweight concrete (1500 kg/m 3) by utilizing recycled plastic aggregate.
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Accumulations of worn‐out automobile tires create fire and health hazards. As a possible solution to the problem of scrap‐tire disposal, an experimental study was conducted to examine the potential of using tire chips and crumb rubber as aggregate in portland‐cement concrete. This paper examines strength and toughness properties of …
DetailsThe quality level of the recycled material used significantly impacts the concrete created with recycled coarse aggregate (RCA). The concrete cylinders that …
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