The recycled aggregate used in this test was mainly produced from construction waste generated by demolished residential buildings in Zhengzhou, China. Concrete waste was crushed using a jaw crusher, with an outlet size of 3 mm. ... Strength and deformation characteristics of recycled concrete aggregate as a backfill material.
DOI: 10.1016/J.CONBUILDMAT.2016.01.042 Corpus ID: 138065342; Relationships between recycled concrete aggregates characteristics and recycled aggregates concretes properties @article{Omary2016RelationshipsBR, title={Relationships between recycled concrete aggregates characteristics and recycled aggregates concretes …
This chapter emphasizes the physical and mechanical characteristics of recycled aggregate along with findings of different researchers. The physical properties such as grading, size and texture, density, specific gravity, water absorption, flakiness and elongation indices of recycled aggregates are discussed in detail.
A general review of how recycled aggregates were used by previous researchers in recent years and their findings are reviewed in this review paper. In addition, methods for enhancing the mechanical characteristics of recycled aggregate and long-term efficiency such as improving the properties without modifying the recycled …
Recycling construction and demolition (C&D) wastes into useable aggregates in subgrade applications offers significant sustainability benefits. However, the characteristics of recycled aggregates, including particle morphology, crushing strength, and shear behavior, differ substantially from natural aggregates.This paper presented …
In this paper, a comprehensive literature review was conducted on the utilization of recycled concrete aggregate (RCA), which is the dominant construction …
Materials and mixtures. The anthropogenic material used in this work as a basic material for the preparation of composites is recycled concrete aggregate, wherein the concrete elements are derived from concrete floors, especially concrete curbs from the demolition of roads, of the strength class between C16/20 and C30/35.
The utilization of recycled coarse aggregates, replacing natural ones, significantly influences the characteristics of hardened concrete, necessitating …
PSD characteristics of the recycled aggregates at different spatial positions. Table 2 lists the PSD characteristics of the recycled aggregates under the effects of gravity and while the slurry was flowing. The particle size of the recycled aggregates in the research region mainly ranged from 0 to 2.5 cm.
A literature review comprising 163 publications published over a period of 26 years from 1992 to 2018 is presented in this paper. This review discusses the generation and recycling of construction and demolition waste (CDW) as well as its main uses as raw materials for the construction engineering sector. This review pays attention to the use …
Similar results could be obtained that the surface structures of recycled brick aggregate and recycled concrete aggregate were comparable rougher than that of natural aggregate due to the diagenetic condition and crystallinity of different aggregates [38], [39]. Hence, it is evident that RFCBs have a greater surface roughness than that of the ...
The uses of RAs produced lower fracture energy and characteristic length. ... Recycled aggregates (RAs) contain not only the original aggregates but also hydrated cement paste adhered to its surface, thus making the paste of RAs more porous than that of natural aggregates (NAs). Accordingly, RAs are characterized as a type of concrete ...
As mentioned above, at the present time when recycled aggregate concrete is already applied to actual structures, the investigation of the effect of RCP generated from multi-recycled concrete is an essential future-oriented task. ... Characteristics of recycled concrete powders. Various techniques have been applied …
Internal corrosion characteristics of endogenous sulfate introduced by recycled aggregates in recycled aggregates concrete: Insights into the macro-mechanical and meso-mechanical properties. Author links open overlay panel Jing Jiang a, Yaogang Tian a b, Dong Lu c, Xin Lu a, Kuo Ji a, Kan Jia a b, Jun Zhang d.
The original concrete characteristics, the recycling process and the size fraction of aggregates are the three most important factors determining the properties of recycled concrete aggregates [5]. The replacement of natural aggregates in a concrete mix can be done either by weight or by volume.
This chapter will mainly introduce the crushing and sieving techniques used around the world, the properties of recycled fine aggregate (RFA) and recycled coarse …
A three-dimensional numerical method using the DEM is proposed to investigate the crushing characteristics of recycled aggregates using a scanning and reconstruction technique to account for the irregular shape of the aggregates. The novelty of this study is to propose a ternary diagram based on these numerical and experimental …
1. Introduction. Recycled aggregate is prepared with waste concrete by crushing, screening, and removing impurities. Using waste concrete to produce recycled aggregate concrete can reduce the consumption of natural aggregate and promote the effective consumption of construction waste [1].However, because old mortars are …
This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and manufacture process, inherent defects (e.g. existing of additional interfacial transition …
The application of recycled aggregates in the asphalt industry has been investigated in recent decades. However, low percentages of these materials have practically been used in asphalt mixtures because of the limitations set by the relevant specifications due to their performance uncertainties. This research investigates the …
The characteristics of recycled coarse aggregates and its effect on performance of recycled concrete. J Building Mater. 2005;17(5):390–5. Google Scholar Marta SJ, Pilar AG. Influence of attached mortar content on the properties of recycled concrete aggregate. In: Proceedings of international conference on sustainable waste …
Recycled aggregate is defined as aggregate resulting from the processing of inorganic or mineral material previously used in construction (BS EN 12620, 2013; MPA, 2013). ... Therefore, fluidity and strength become opposite characteristics when using recycled aggregates. The increase in the superplasticizer content and optimized proportioning ...
This article presents a comprehensive review on the use of recycled concrete aggregate (RCA) and recycled aggregate concrete (RAC) in construction, …
natural course and fine aggregates there are many ongoing research and development works are taking place, is one of. them is to use recycled aggregates for the concrete mix design. Recycled aggregate contains inorganic concrete waste like processed and crush concrete blocks, brick-bats, and recycled steel fiber.
This chapter emphasizes the physical and mechanical characteristics of recycled aggregate along with findings of different researchers. The physical properties …
Replacing natural aggregate with construction waste to prepare concrete is an effective way of its resource utilization, which is in line with China 's " carbon peaking and carbon neutrality " strategy and the green development needs of the construction industry.Due to the existing technology is difficult to completely separate waste bricks …
Fine aggregate was comprised of 60% river sand and 40% recycled aggregate (RA), coarse aggregate used was crushed rock for the development of M50, M60 and M70 grades of concrete.
In order to enhance the CO 2 curing efficiency of concrete block prepared with recycled aggregates, several material characteristics of the concrete block including moisture content, bulk density, aggregate to cement ratio, recycled aggregate content and types of binders, were studied experimentally to assess their effects on the CO 2 curing …
The strength properties such as compressive strength, modulus of elasticity, splitting tensile strength and flexural strength are studied. Durability properties such as …
The results from a series of repeated load triaxial tests on recycled concrete aggregate (RCA), crushed bricks (CB), and waste excavation rock (WR) reported that most of the recycled C&D materials produced comparatively smaller permanent strain and greater resilient modulus than those of the commonly used granular subbase natural …
In this paper, a comprehensive literature review was conducted on the utilization of recycled concrete aggregate (RCA), which is the dominant construction and demolition waste material, in base and subbase layers and its comparison with natural aggregate (NA).
