Sustainable building materials-recycled aggregate and concrete…

Resource utilization of construction and demolition (C&D) waste has great potential to significantly reduce the consumption of natural resources and improve the environment. Meanwhile, establishing a sound policy system and reducing production are the key ways to solve the problem of C&D waste. Numerous studies on C&D waste, …

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A Comprehensive Review on Recycled Aggregate and Recycled Aggregate …

Using recycled aggregates from construction and demolition waste can preserve natural aggregate resources, reduce demand of landfill, and contribute to sustainable built environment. This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, …

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Tailoring Light-Weight Aggregates for Concrete …

Concrete 3D is a sustainable solution for manufacturing efficient designs and creating less waste, and selecting the optimal materials to use can amplify the advantages of this technology. …

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Using Recycled Concrete as a Replacement for Coarse Aggregate …

The mix design was done by weight for better concrete workability. As stated, the increase in ceramic waste coarse aggregate replacement in concrete, decreases the compressive strength values. ... Using recycled concrete aggregates in sustainable green concrete manufacture enhanced the fresh and hardened concrete …

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Comparative Study on Natural and Recycled Concrete Aggregate …

The RCA is composed of coarse recycled concrete aggregate (CRCA) and fine recycled concrete aggregate (FRCA). The CRCA is a small concrete component made up of old coarse aggregate, mortar, and interfacial transition zone (ITZ), whereas the FRCA (>5 mm) is made up of crushed and sieved waste concrete mortar fragments.

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Structural Lightweight Concrete Containing Recycled …

In this paper, Structural Lightweight Concrete (SLC) containing Recycled Lightweight Aggregate (RLA) is described. Damaged lightweight concrete was used as RLA by crushing it into fine particles, and used to replace fine limestone aggregate of up to 45% by weight. To enhance the strength development of SLC, silica fume and a …

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Calculate Crushed Concrete Road Base | Cubic Yard (or …

Type in inches and feet of your project and calculate the estimated amount of Recycled Materials in cubic yards, cubic feet and Tons, that your need for your project. The Density of Crushed Concrete Road Base: 2,410 lb/yd³ or 1.21 t/yd³ or 0.8 yd³/t

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Properties of concrete incorporating recycled coarse aggregates …

Recycled concrete aggregates. Recycled concrete aggregates (RCA) (Fig. 1e) were obtained from Saudi Investment Recycling Company (SIRC) [] from 25 MPa concrete and used to replace the natural coarse aggregates at replacement levels of 40% and 60%.Sieve analysis was performed, as shown in Fig. 2, and other physical …

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Recycled Concrete Aggregate

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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Incorporating coarse and fine recycled aggregates into …

This research aims to assess the feasibility of using recycled concrete aggregates (RCA) as a surrogate for natural aggregates (NA) in concrete applications …

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Green lightweight concrete utilizing sustainable processed recycled

Normal-weight crushed limestone (NA1) and lightweight pumice (LWA2), naturally occurring aggregates, were assumed to have been taken from and sourced from a nearby quarry. ... Using lightweight recycled plastic aggregate in concrete structures can be sufficient tool for waste recycling and improving the concept of environmental …

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Green and Durable Lightweight Aggregate Concrete: The …

The primary purpose of developing green high-performance light-weight aggregate concrete is to reduce the carbon footprint. It was reported that the LWAC can be prepared by using recycled ... with using the recycled concrete as lightweight aggregates, the compressive, splitting tensile strength, and the modulus of elasticity …

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Chapter 15 Guidelines for Recycled Aggregate Concrete …

15.2.1 Processing and Grading of Recycled Aggregates Figure 15.1 illustrates the production and processing of recycled aggregates. The recycled aggregates are …

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Behaviour of recycled aggregate concrete under drop weight …

[14] Chakradar rao et.al, "studied the behaviour of recycled aggregate concrete under drop weight impact load and concluded that 25% of RCA does not influence on compressive strength of concrete ...

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Recycled Aggregate: A Viable Solution for Sustainable Concrete …

Construction and demolition activities consume large amounts of natural resources, generating 4.5 bi tons of solid waste/year, called construction and demolition waste (C&DW) and other wastes, such as ceramic, polyethylene terephthalate (PET), glass, and slag. Furthermore, around 32 bi tons of natural aggregate (NA) are extracted …

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The Effect of Aggregate Properties on Concrete

The most common classification of aggregates on the basis of bulk specific gravity is lightweight, normal-weight, and heavyweight aggregates. In normal concrete the aggregate weighs 1,520 – 1,680 kg/m 3, but occasionally designs require either lightweight or …

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Mechanical performance of recycled aggregate concrete in …

RAC with waste concrete as coarse aggregate is the most widely used at present. The research on RCCA concrete has been very completed. And it has standard specifications, including GB/T25177–2011 "Recycled coarse Aggregate for concrete" and GB/T25176–2011 "Recycled fine aggregate for concrete and mortar".

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Evaluation of the physical and mechanical properties of concrete …

Figure 7 shows that when replacing the recycled concrete aggregate with natural aggregate in proportions of 10%, 20%, 30% and 40%, there is a decrease in its unit weight of 0.41%, 1.06%, 1.54% and 1.63%, respectively, compared to the reference concrete; likewise, 3 tests were carried out for each addition percentage to analyze its …

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topicdetail

The American Concrete Institute (ACI) is a leading authority and resource worldwide for the development and distribution of consensus-based standards, technical resources, educational programs, certification programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a …

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A comprehensive review on the use of recycled concrete aggregate …

For example, during highway construction, the demolished concrete from the concrete pavement can be crushed, and the recovered aggregate materials can be reused for constructing the same pavement (either concrete or asphalt) or recycled into new pavement construction (Albayati et al., 2018, Zhang et al., 2016). Such aggregates …

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A Comprehensive Review on Recycled Aggregate and …

This article provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse, …

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Lightweight Aggregate

Concrete Aggregates. Ian Sims, ... James Ferrari, in Lea's Chemistry of Cement and Concrete (Fifth Edition), 2019. 15.7.1.2 Lightweight Aggregates. EN 13055 292 defines lightweight aggregates as aggregate of mineral origin having a particle density not exceeding 2000 kg/m 3 or a loose bulk density not exceeding 1200 kg/m 3.There is no …

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Studies on Hemp and Recycled Aggregate Concrete

This paper reports on the first phase of a multi-phase research program conducted at the American University of Beirut (AUB) on "Hemp and Recycled Aggregates Concrete" (HRAC). HRAC is a new sustainable concrete material where hemp fibers are incorporated in the mix, the coarse aggregate content is reduced by 20% of the …

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Sustainability | Free Full-Text | Application of Aggregates …

However, recycled aggregate could reduce the weight of structures due to its low density, which is conducive to earthquake resistance. ... Moghimi, M.; Bin, H. The role of 0–2 mm fine recycled concrete aggregate on the compressive and splitting tensile strengths of recycled concrete aggregate concrete. J. Mater. Des. 2014, 64, 345–354 ...

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Recycled Coarse Aggregates in Concrete: A Comprehensive …

This article explores the use of recycled coarse aggregate (RCA) derived from construction and demolition waste in concrete, and its effects on mechanical and …

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Mechanical performance of recycled aggregate concrete in …

This article summarizes the physical and mechanical properties of recycled aggregate concrete (RAC) with waste concrete and brick as coarse aggregate, and …

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New Mix Design Method for Recycled Concrete Using Mixed Source Concrete

Abstract This study proposes a new mix design method for C30 recycled concrete using recycled aggregate crushed from different strength source concrete (SC). The dosages of cement, water, sand, and coarse recycled concrete aggregate (CRCA) are the same as the corresponding components in natural concrete, but the CRCA should be pre-wetted …

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A novel method for characterization of recycled concrete aggregates

The fine aggregate used in the parent concrete mixtures was a crushed 0–5 mm limestone aggregate. However, the coarse aggregate in half of the parent concretes was 5–15 mm and 15–25 mm crushed basalt aggregate and in the remaining half a crushed limestone one with the same size fractions.

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Optimum recycled concrete aggregate and micro-silica …

Recycled concrete aggregate (RCA) was used as a partial replacement of coarse and fine natural aggregates. ... Then, the mold is lifted to allow the concrete to flow under its self-weight. If the measured time is less than 1 s, the concrete has low viscosity, and if it is more than 5 s, the concrete has a high viscosity. 3.3.3. V funnel test.

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CA6 Gravel: Road Base Gravel & Recycled Concrete

Recycling concrete consists of breaking, removing, and crushing concrete from an existing location and then using it to create a new, reusable material that can be reused as a base layer for concrete structures. ... CA6 is a popular construction aggregate with a variety of applications, including gravel for driveways, trench backfill, paver ...

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(PDF) Green and Durable Lightweight Aggregate Concrete: The …

Lightweight aggregate concrete manufactured by solid waste or recycled by-products is a burgeoning topic in construction and building materials.

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