Four types of coarse aggregate were used in the manufacture of the different RACs.-NCA: Natural coarse aggregate extracted from a limestone quarry and used to manufacture the control concrete (NAC).-RCA1: First recycled coarse aggregate, produced by crushing NAC and used to manufacture the first-generation concrete RAC1 …
Production of High-Quality Coarse Recycled Aggregates through a Two-Stage Jigging Process . by Viviane L. S. Gschwenter ... Dos Santos, V.L. Characterization of demolished concretes with three different strengths for recycling as coarse aggregate. Minerals 2021, 11, 803. [Google Scholar] Meddah, M.S.; Zitouni, S.; Belâabes, S. Effect …
By incorporating recycled coarse aggregate (RCA) derived from construction and demolition waste into concrete, waste reduction and natural resource …
The recycling process results in a high quality coarse aggregate and cement mortar. The aggregate can be used as a complete substitute of natural aggregates in concrete and gives comparable or better properties than concretes with a natural aggregate. The ground mortar can be a pozzolana addition to cement and sand-line …
The reuse of construction and demolition waste has become vitally important because of the requirements of environmental protection and sustainable development. The vibration mixing process is a new technology and novel method that improves the performance of concrete by optimizing the mixing process without changing …
Download scientific diagram | Aggregate Recycling process from publication: Cost-Benefit Analysis of Using Recycled Coarse Aggregate In Plain and Fiber Reinforced Concrete | The tendency of ...
Tuning of beneficiation based on process efficiency and aggregate quality. ... and river sand and crushed granite, as fine and coarse aggregate, respectively. The proportions of cement: sand: 10 mm down coarse aggregates: 20 mm down coarse aggregates: water are 1:2:1:1.8:0.45. ... Assessment of recycling process induced …
This paper describes a disposal process for this material, where GW can be used as an alternative aggregate for advanced concrete. ... Permanent deformation behaviour of pavement base and subbase containing recycle concrete aggregate, coarse and fine crumb rubber. Constr. Build. Mater., 178 (2018), pp. 51-58. View PDF View …
This paper presents guidelines for using recycled-concrete aggregate (RCA) as a full or partial replacement for natural coarse aggregate in new concrete (RCA concrete). Several international standa...
DOI: 10.1016/J.CEMCONCOMP.2018.06.013 Corpus ID: 139320918; Properties of recycled aggregate concrete prepared with scattering-filling coarse aggregate process @article{Xu2018PropertiesOR, title={Properties of recycled aggregate concrete prepared with scattering-filling coarse aggregate process}, author={Gelong Xu and Weiguo …
This process is distinguishable from the single cementation fusion (chemical bonding) of 3DP-M filaments but is rather a mechanical meshing of coarse aggregate nested across layers in the interlayer and intralayer interface areas (the depth of coarse aggregate nested across layers is greater in the interlayer area than in the intralayer …
Recent technology has also improved the recycling process. This study aims to Testing of recycled coarse aggregate by using concrete. In this research concrete waste is from the demolished ...
The shape of coarse aggregate is an important factor determining the performance of concrete, and it also affects the whole mixing process. This article selected four typical coarse aggregates and simulated the motion behavior of the coarse aggregate and mortar in a dual horizontal axis mixer using discrete element software, EDEM. The …
60–70% of the concrete lump from demolished structures is presently reused for subbase course material of roads, and the rest is discarded. In ten years the amount of the demolished concrete is estimated to be 3 to 5 times of the present amount. The reuse for subbase course will become difficult and recycling of concrete from structure to …
Ground granulated blast furnace slag (GGBFS), a by-product from iron industry, was recycled as artificial coarse aggregate through cold bonding pelletization process. The artificial slag aggregates (ASA) replaced partially the natural coarse aggregates in production of self-compacting concrete (SCC) …
In the current century, urbanization and the development of the construction industry have led to the generation of construction and demolition waste (CDW), imposing pressure on ecology and the environment. This has attracted the attention of industry personnel and researchers. This work discusses the current research on recycled …
The recycled aggregate obtained from demolished concrete was angular, with a higher water absorption rate and higher specific gravity than natural coarse aggregate, and usually higher compressive ...
The process of multiple recycling of stone coarse ag gregates ... This paper evaluates the influence of the use of agate waste as coarse aggregate in the compressive strength and the cement ...
The current research project sought to evaluate the effect of powders that have been generated from a repeated recycling process of coarse aggregate concrete. To do so, various analytical techniques have been adopted to examine the chemical, microstructural, thermal, and morphological aspects of RCPs In addition, the influences …
AbstractAn extensive investigation was carried out for recycling of demolished brick aggregate concrete as coarse aggregate. For this, demolished concrete blocks were collected from 33 different building sites of different ages and broken into pieces as coarse aggregate. Owing to the lack of availability of stone aggregate in Bangladesh, most of …
Recycled coarse aggregate (RCA) made from waste concrete is not a suitable structural material as it has high absorption of cement mortar, which adheres on the aggregate surface and on the tiny cracks thereon. Therefore, when using RCA made from waste concrete, much water must be added with the concrete, and slump loss occurs …
This paper presents guidelines for using recycled-concrete aggregate (RCA) as a full or partial replacement for natural coarse aggregate in new concrete (RCA …
Microwave assisted concrete recycling is highlighted by a large number of research groups all over the world due to its potential for significant process benefit. In this paper, systematic experiments are established to study the microwave heating and aggregate recycling of dried and saturated concrete, respectively, investigating the …
recycling process are jaw crusher, impact crusher, gyratory crusher, magnate sepa-rator, and sieve (Rao et al.2019). The procedure followed in India is explained in the subsequent section. 2.2 Extraction of Recycled Coarse Aggregate Recycling of waste concrete involves several manual as well as mechanical steps
1. Introduction. To obtain good quality concrete using recycled aggregate it is necessary to follow the minimum requirements defined by the BCSJ [1], RILEM [2], DIN 4226.100 [3], and prEN 13242:2002 [4].Acceptable properties of aggregates are an elemental base for concrete quality, however adequate mix proportions and concrete …
This study presents a liberation process for recycling high-quality coarse aggregates from waste concrete by impacting with steel grits.
The result showed that the incorporation of 15% RBCA as coarse aggregate in the production of sustainable and durable concrete holds promise for the future. ... One effective method is the recycling of C & D waste, transforming it into a new source of coarse and fine [2,3,4,5,6], or incorporating the process as an additional …
After demolition of old roads and buildings, the removed concrete is often considered worthless and disposed of as demolition waste. By collecting the used concrete and breaking it up, recycled concrete aggregate (RCA) is created (Fig. 1).This paper focuses on coarse RCA which is the coarse aggregate from the original concrete that …
However, as it has been pointed out that studies on concrete recycling are mainly focused on coarse aggregate [13], research on repeated recycling of concrete has also largely concentrated on the ...
Xiao [18, 19] conducted an intensification test on recycled coarse aggregate (RCA) by low-power microwave. Compared with the traditional technique, microwave heating can improve the efficiency of mortar and aggregate debonding. ... systematically discussed the possibility of microwave technology in the concrete recycling process …
