Addressing the increasing demand for concrete due to advancements in the construction sector and population growth, this research explores the critical intersection of waste management and sustainable construction practices. By incorporating recycled coarse aggregate (RCA) derived from construction and demolition waste into concrete, …
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Abstract With the increasing scarcity of natural gravel resources and increased production of construction and demolition waste, recycled aggregates offer prospects for concrete structures. However, the adhered loose and porous mortar and microcracks in ...
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The properties and reuse of recycled aggregate concrete (RAC) are markedly limited by the defects of RCAs, highlighting the need to effectively enhance the …
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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 …
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High-strength recycled aggregate concrete (HSRAC) has been extensively studied in terms of mix design, properties, models, and structural behaviour. However, a comprehensive state-of-the-art review of HSRAC is still lacking. This paper addresses this gap by reviewing studies on mix proportion design, properties (including mechanical …
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Recycled Concrete Aggregate A Sustainable Choice for Unbound Base ACI Fall 2015 Convention Denver, Colorado November 8, 2015 Cecil L. Jones, PE Diversified Engineering Services, Inc.
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This paper presents the results of an experimental program related with the failure and mechanical behavior of Recycled Aggregate Concrete (RAC) under different load scenarios. The particular type of RAC considered herein is characterized by the partial or total replacement of natural coarse aggregates by recycled ones obtained from the …
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Reusing aggregate from building and demolition waste can help protect the ordinary natural aggregate supply, reduce landfill demand, and drive toward a more sustainable environment. This paper examines the recycled history of recycled …
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For the recycled aggregate concrete, it would be necessary to add more cement in concrete made with of recycled aggregate in order to achieve the same workability and compression strength as conventional …
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Recycled concrete aggregate offers many diverse advantages, among the most prominent are safety and durability. However, keeping in mind the complications posed by the use of concrete …
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Locally available river sand confirming to Zone II specification of IS 383-1970 [41] was used as Natural Fine Aggregate (NFA) in producing concrete mixes. The crushed dolerite of 20 mm nominal size was employed as Natural coarse aggregate (NCA) and the Recycled Coarse Aggregates (RCA) were prepared from the concrete …
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Li et al. [15], Tang [16], Jin et al. [17] and Kou et al. [18] had conducted experiments on the compressive strength of recycled aggregate concrete (RAC). The results indicate that the amount of RCA has remarkable influence on the compressive strength of concrete. Some typical findings are shown in Fig. 3, which illustrates the relationship between the RCA …
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Pervious concrete is a tailored-property concrete with high water permeability which allow the passage of water to flow through easily through the existing interconnected large pore structure. This paper reports the results of an experimental investigation into the development of pervious concrete with reduced cement content …
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The durability performance of high-performance recycled aggregate concrete (HPRAC) prepared with ground blast furnace slag (GGBFS) and recycled aggregates is also of interest, so the effect of fly ash (FA) and MgO on the durability performance of HPRAC was investigated, with an RCA replacement rate of 40%, with …
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Recycled aggregates from construction and demolition waste towards an application on structural concrete: A review. Fernanda de Andrade Salgado, Flávio de Andrade Silva, in Journal of Building Engineering, 2022. Highlights • Recycled aggregate is a sustainable solution for environmental depletion of construction sector.. Properties of recycled …
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They placed a lane of concrete with aggregates next to a lane of concrete using recycled aggregate. The contractor obtained the material from demolition right at the airport. Sensors in the concrete measured temperature, relative humidity and lift-off. Researchers also monitored surface appearance and joint width.
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Recycled concrete helps reduce construction's carbon footprint. Learn how this sustainable material is transforming the construction industry. ... This process can be carried out in a quarry or on-site, and the resulting product is called recycled concrete aggregate (RCA) that can be used as a base to make new concrete products. The …
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Now, after five years of weather and use, the recycled concrete has proven that it can perform as well as new concrete and often better. Not only that, but the recycled concrete can be recycled again and used a second and third time without its target strength being compromised, although the rate of strength gain is less with each use.
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The physio-chemical changes in concrete mixes due to different coarse aggregate (natural coarse aggregate and recycled coarse aggregate (RCA)) and mix design methods (conventional method and Particle Packing Method (PPM)) are studied using thermogravimetric analysis of the hydrated cement paste. A method is proposed …
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Materials and reagents. The application of recycled concrete aggregates (RCA) serves as a widely embraced method on behalf of repurposing concrete waste, aligning well with the principles of sustainable development [].The primary objective of the experimental program is to assess the feasibility of substituting coarse and fine natural …
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What is Recycled Concrete Aggregate? Recycled Concrete Aggregate (RCA) — also called "crushed concrete" — is made up of asphalt debris from other construction projects that can be reused …
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Given that the quality of recycled concrete materials is one of the many factors influencing the properties of concrete (Kim 2022), it is of great significance to …
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Purpose Construction and demolition waste (C&DW) is the largest waste stream in the European Union (EU) and all over the world. Proper management of C&DW and recycled materials—including the correct handling of hazardous waste—can have major benefits in terms of sustainability and the quality of life. The Waste Framework …
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This monograph addresses the use of recycled concrete aggregates (RCA) as a replacement for natural aggregates (NA) in concrete applications.
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2. Cackler, T. 2018. Technology Transfer of Concrete Pavement Technologies: Recycled Concrete Aggregate Usage in the US. National Concrete Pavement Technology Center, Iowa State University, Ames, IA. 3. Cavalline, T. L. 2018a. Concrete Pavement Recycling Series: Protecting Water Quality through Planning and Design Considerations. Technical …
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The property and structural or non-structural application of recycled aggregate concrete (RAC) have been extensively studied and some findings have been adopted in engineering practice [105]. Afterwards, with the drive towards sustainable development, to promote the application of RAC, scholars started to evaluate the …
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CH content of recycled aggregate concrete containing recycled aggregates pre-treated by nano-silica with various concentrations and conditions. 3.3. Effect of nano-silica soaking method on the pore structure of RAs. In this section, the RA, RA-N, and RA-V respectively indicate the recycled aggregates before nano-silica soaking, the recycled ...
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Transportation costs, energy use and wear and tear on roads and equipment are all reduced. The recycled aggregate is used as soon as it is processed. Recycled concrete currently supplies about 5% of aggregate use. The bulk of recycled aggregates – about 68 % – is used as road base. The remainder is used for new concrete mixes (6%), asphalt ...
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Recycling CDW into recycled concrete aggregates (RCA) is a way to reduce simultaneously the amount of waste and consumption of natural mineral resources.
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The mechanical properties of recycled aggregate concrete have been studied, including concrete prepared with RCA and RFA [30]. The results showed that the increase in mechanical properties of RAC in a long period was higher than that in natural aggregate concrete [31].
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