In this research, recycled concrete aggregates RCA from site-tested concrete specimens were used. These consist of 28-days concrete cubes after compression test obtained from a local construction site. These concrete cubes are crushed to suitable size and reused as recycled coarse aggregate. The amount of recycled concrete aggregate used in this research is approximately 200 kg.
This crushed concrete will be used as a coarse aggregate to produce new concrete, which will be compared with natural aggregate concrete. The target is to produce 30 MPa concrete compressive strength at 28 days. Natural sand is used as fine aggregate in the mixes of both natural concrete and recycled aggregate concrete.
Synopsis. The effects of using crushed concrete as coarse and fine aggregates upon strength and deformation of concrete are reported. The properties of recycled aggregates differ from those of natural aggregates due to the presence of a considerable proportion of mortar attached natural aggregate
Aug 28, 2021 The use of the prepared core-shell lightweight aggregate as a coarse aggregate has resulted in the production of lightweight concrete with dry density ranging from 1115 to 1540 kgm3 and compressive strength of 1826 MPa and thermal conductivity of 0.31690.6660 Wm K .
Alternative Materials for Coarse Aggregates. There are a number of materials available for the alternative for coarse aggregate in concrete.In concrete, we can alternate cement with reuse materials to reduce energy consumption. The list of wastes used in concrete can include fly ash, wood ash, blast furnace slag, or fumed silica. The partial replacement of coarse aggregate in concrete can bed ...
4.3.6 Coarse recycled aggregate RA Where coarse RA is specified, its use in concrete shall be assessed on a case-by-case basis taking into account its specific composition. The minimum requirements of coarse RA in accordance with BS EN 12620 shall be as given in Table 4.
AGGREGATES FOR CONCRETE E1-3 sieve and predominantly retained on the 75 m No. 200 sieve is called fine aggregate or sand, and larger aggregate is called coarse aggregate. Coarse aggregate may be available in several different size groups, such as 19 to 4.75 mm 34 in. to No. 4, or 37.5 to 19 mm 1-12 to 34 in..
1. 0 Recycled Aggregate 1.50 2. 25 Recycled Aggregate 2.05 3. 50 Recycled Aggregate 2.87 4. 75 Recycled Aggregate 3.40 5. 100 Recycled Aggregate 4.60 2. Sieve Analysis Test of Aggregates From the sieve analysis test, the particle size distribution of coarse and fine aggregate has been determined. The test is
Utilization of Waste Plastic and Waste Glass Together as Fine and Coarse Aggregate in Concrete Ilham I. Mohammed1 amp Nazim Abdul Nariman2 amp Kaywan Othman3 amp Sarhad Ali4 amp Peshwaz Mohammed5 amp Sirwan Samad6 1,2,3,4,5amp6Civil Engineering Department, Faculty of Engineering, Tishk International University, Sulaimani, Iraq
Recycled Aggregate can be used in the following constructions. Can be used for constructing gutters, pavements etc. Large pieces of crushed aggregate can be used for building revetments which in turn is very useful in controlling soil erosion. Recycled concrete rubbles can be used as coarse aggregate in concrete.
compared with different concrete mixes of different percentages of recycled aggregates. Recycled coarse aggregate is added in different amounts such as 20, 40, 60, 80 and 100. Cube compressive strength, cylinder compressive strength and split tensile strength of concrete made with recycled concrete aggregates are evaluated. A total of 72 cubes
Jun 08, 2020 The properties of ceramic waste coarse aggregate concrete are not significantly different from those of conventional concrete. The use of ceramic waste coarse aggregate concrete has increased because it has various advantages over other cementitious materials 3. processing. These wastes cause soil, air and groundwater pollution.
2.5. Recycled coarse aggregate RCA The RCA is from demolished building concrete consisting of crushed stone aggregate with old mortar adhering to it. Various techniques of processing the wastes and effects on the properties of concrete are to be explored. The properties of recycled concrete aggregate are mentioned in Table 3.
articleosti7310891, title Use of recycled concrete as aggregate. Final report, author Buck, A D, abstractNote Supplies of natural mineral aggregates are diminishing as their usage increases. Disposal problems exist because of steadily increasing accumulation of solid wastes. In light of these two situations an investigation was made to evaluate the use of crushed waste concrete ...
CiteSeerX - Document Details Isaac Councill, Lee Giles, Pradeep Teregowda ABSTRACT Utilization of Recycled Aggregate in concrete has been employed due to awareness of society in natural resources protection. The application of Recycled Aggregate RA as coarse aggregate in concrete mixes has been iniated as to make use effectively the waste materials.
Dec 16, 2019 Table 2 Recycled Concrete Aggregate Use Summary of Recycled Concrete Usage WSDOT Contracts Completed Nov 2018 Oct 2019 Recycled Contract Material Concrete Quantities Used Tons Tons Coarse Aggregate for Commercial Concrete 0 2,396 Ballast 0 0 Permeable Ballast 0 785 Crushed Surfacing 566 63,714
use of RCA in concrete aggregates, sub-base materials, rip-rap or slope protection, embankment burrow, and aggregate base coarse. Cost savings as high as 65 have been realized. This fact sheet provides information on the recycling of concrete pavement including the
Use of recycled concrete rubbles as coarse aggregate in concrete. The use of concrete in structures consumes millions of tons of aggregates. Since earth is the source of the aggregates either natural or crushed, then obtaining these amounts would have an adverse effect on the environment. Furthermore, demolishing concrete structures and ...
Coarse recycled aggregates with a par-ticlesizeof . mm and recycled aggregate nes with a particle size of . mm. ree mixtures were prepared, ... Utilization of recycled concrete aggregates as a total replacement of virgin granite aggregate in porous asphalt mixtures was investigated by Chen and Wong
aggregates RCAs. Recycling waste concrete produces a substitute to natural aggregates and preserves the environment by reducing waste disposal at landfills and conserving energy. The use of recycled concrete aggregates has piqued the interest of many researchers by utilization of a full or partial substitution to that of natural aggregates in ...
Today, the use of recycled aggregates as a substitute for a part of the natural aggregates in concrete production is increasing. This approach is essential because the resources for natural aggregates are decreasing in the world. In the present study, the effects of recycled concrete aggregates as a partial replacement for fine by 50 and coarse aggregates by 100 were examined in the self ...
Dec 17, 2014 Utilization of recycled concrete aggregates as a total replacement of virgin granite aggregate in porous asphalt mixtures was investigated by Chen and Wong . In this research, Draindown, Cantabro, Marshal, permeability, and ageing tests were carried out to evaluate the performance of the porous asphalt mixtures.
properties of concrete using recycled coarse aggregate. In this research, concrete waste from demolished structure has been collected and coarse aggregate of different percentages is used for preparing fresh concrete 0, 25, 50, 75 amp 100. The compressive strength of
The strength of recycled coarse aggregate is lower than natural aggregate. The weight of recycled coarse aggregate is lighter than natural aggregate. This is the general effect that will reduce the strength of reinforced concrete. TEXTURE Recycled Coarse Aggregate has the rough textured, angular and elongated particles
the possibility of the use of recycled coarse aggregate concrete as a new structural material.For that purpose a literature survey for use of recycled aggregate concrete is studied. Recycled coarse aggregate RCA obtained from crushed concrete rubble and different demolished work.
Feb 02, 2015 Present investigations deal with the development of green concrete M 30 grade using recycled coarse aggregates for sustainable development. Characterization of recycled coarse aggregates showed that physical and mechanical properties are of inferior quality and improvement in properties was observed after washing due to removal of old weak mortar adhered on its surface.
Download Citation Utilisation of Recycled Aggregate as Coarse Aggregate in Concrete In this rapid industrialised world, recycling construction material plays an important role to preserve the ...
This study evaluated the use of recycled concrete as coarse aggregate in new concrete pavements. Recycled concrete aggregate RCA produced from demolished pavements in three geographically-dispersed locations in Washington state were used to perform testson aggregate characte ristics, fresh concrete propertiesand hardened concrete properties.
Mar 14, 2020 Recycled concrete aggregate RCA, which contains more than 70 of concrete particles, is according to standards 15, 16 possible to use as partial replacement of coarse natural aggregate in certain applications see Figure 1..
The states that do use recycled concrete aggregate RCA in new concrete report that concrete with RCA performs equal to concrete with natural aggregates. Most agencies specify using the material directly in the project that is being reconstructed. Recycling of concrete is a relatively simple process.
of concrete using recycled coarse aggregate. In this research, concrete waste fr om demolished structure has been collected and coarse aggregate of different percentages is used for preparing fresh concrete 0, 25, 50, 75 amp 100. The compressive strength of recycled coarse aggregate RCA is found to be higher than the
Appl. Sci. 2019, 9, 1935 3 of 21 In this research, to use recycled aggregate in structural buildings, a facility was developed and research was conducted to remove the cement paste attached to the surface of the recycled aggregate,
Jul 01, 2020 The slump test is the common and practical workability test for fresh concrete and is performed in accordance with ASTM C143 . Fig. 1 shows the slump values for HPCs that are prepared with natural aggregate b and RA c. The maximum detected slump value of HPC without RA was 185 mm .Previous studies, however, had demonstrated that completely replacing natural aggregate with
optimum coarse aggregate mix ratio to achieve this strength. A. literature review 1 Medina 2012 Medina studied on effective utilization of ceramic waste as recycled coarse aggregate. It was produced by crushing of sanitary ware and its shape curve of recycled ceramic aggregate was similar to the natural coarse aggregate.
concretes. A total amount of 12918m 3 of recycled aggregate concrete was used in this project 11. 2. EXPERIMENTAL PROGRAM The main aim of this research project is to utilise recycled concrete as coarse aggregate for the production of concrete. It is essential to know whether the replacement of RCA in concrete is inappropriate or acceptable.