A STUDY ON RECYCLED CONCRETE AGGREGATES
Concrete is a composite material composed of water, coarse granular material (fine and coarse aggregate) embedded in a hard matrix (cement or binder) that fills the space among the aggregate particles and glues them together.
The influence law of concrete aggregate particle size on,
22-11-2021· To obtain the influence law of the concrete aggregate particle size on the attenuation of elastic wave parameters, a higher aggregate mass ratio was selected within a reasonable range for the,
Properties of Structural Lightweight Aggregate Concrete,
09-10-2021· SFA aggregate is a good alternative to ordinary aggregates. Concrete based on SFA can be successfully used in elements with load-bearing functions. It is a pro-ecological product that perfectly fits the idea of sustainable development.
Recycled Concrete Aggregates: A Review | International,
29-03-2013· The shape of the aggregate pieces is influential on the workability of the concrete. Exteberria et al. ( 2007) warned that the method of producing RCA and the type of crusher that is used in this process is influential in the shape of RCA produced. NA is generally an angular shape with smooth sides.
Investigating the Effects of Aggregate, - Scholar Commons
Scholar Commons Theses and Dissertations Spring 2020 Investigating the Effects of Aggregate Size and Reinforcement on ASR Cracking in Concrete Structures Studied with Different Evaluation Methods David Joseph Bianco Follow this and additional works at: https://scholarcommons.sc.edu/etd Part of the Civil and Environmental Engineering Commons
Durability studies on recycled fine aggregate concrete,
30-07-2020· The use of recycled fine aggregates (RFA) from construction and demolition (C&D) waste in concrete gaining importance from past decades. The presence of excessive fines and old adhered mortar in RFA, make mediocre properties of RFA concrete. The influencing properties of RFA concrete on different durability aspects lacks research data.
Recycled concrete as an aggregate for concrete—a review,
— An investigation of the compressive strength of concrete in which concrete rubble was used as an aggregate, unpublished thesis, Cornell University, 1947. [6] Malhotra V. M. — The use of recycled concrete as a new aggregate. Proc. of Symposium, Energy and Resource Conservation in the Cement and Concrete Industry, Canmet, Ottawa, 1976. [7]
Comparative analysis on costs and benefits of producing,
01-12-2020· It was reported that the long-term net benefit of producing coarse recycled concrete aggregate (CRCA) from waste concrete was positive with a value of US$ 22,334,116 per year, while that of crushed coarse natural aggregate (CNA) was a negative net value of US$ - 31,841,109 per year.
Characterization of Recycled Coarse Aggregate (RCA) via a,
20-05-2014· 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 when transporting.
The influence law of concrete aggregate particle size on,
22-11-2021· To obtain the influence law of the concrete aggregate particle size on the attenuation of elastic wave parameters, a higher aggregate mass ratio was selected within a reasonable range for the,
Properties of Structural Lightweight Aggregate Concrete,
09-10-2021· SFA aggregate is a good alternative to ordinary aggregates. Concrete based on SFA can be successfully used in elements with load-bearing functions. It is a pro-ecological product that perfectly fits the idea of sustainable development.
Recycled Concrete Aggregates: A Review | International,
29-03-2013· Froudinstou-Yannas, S. (1977). Waste concrete as aggregate for new concrete. ACI Journal,74, 373–376. Google Scholar JIS. (2011). Recycled aggregate for concrete-class H (JIS A 5021:2011). Tokyo: Japan Concrete Institute (in Japanese). JIS. (2012a). Recycled concrete using recycled aggregate class M (JIS A 5022:2012).
(PDF) Gradation of Aggregates and its Effects on,
Concrete is produced in greater amounts, as a result of this aggregate shortage The focus of this research was to see if ash can substitute for fine aggregates
Recycled concrete as an aggregate for concrete—a review,
The present state of knowledge on the use of recycled concrete as an aggregate in new concrete is reviewed and suggestions made as to what further work is necessary before a proper assessment of the material can be made. Where crushed uncontaminated concrete is used the properties of the material as an aggregate and the basic engineering characteristics of the
Investigating the Effects of Aggregate, - Scholar Commons
Scholar Commons Theses and Dissertations Spring 2020 Investigating the Effects of Aggregate Size and Reinforcement on ASR Cracking in Concrete Structures Studied with Different Evaluation Methods David Joseph Bianco Follow this and additional works at: https://scholarcommons.sc.edu/etd Part of the Civil and Environmental Engineering Commons
Effects of Recycled Aggregate on Concrete Mix and Exposure,
25-06-2019· The unit weight of the concrete ranged from 2365 to 2175 kg/m 3, depending on aggregate content (Figure 6).Increasing the recycled aggregate content reduces the unit weight and density of the concrete, resulting in lighter concrete (Figure 6).The unit weights of the 15%, 20%, and 25% mixes were reduced by 8%, 11%, and 11.5%, respectively, compared to plain
Recycled Concrete Aggregate Coefficient of Thermal,
01-01-2009· Despite a critical shortage of virgin aggregate, the availability of demolished concrete for use as recycled concrete aggregate (RCA) is increasing. Using this waste concrete as RCA conserves virgin aggregate, reduces the impact on landfills, decreases energy consumption, and can provide cost savings.
Characterization of Recycled Coarse Aggregate (RCA) via a,
20-05-2014· 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 when transporting.
Effect of Paste-Aggregate Bond Strength on Behavior of,
Abstract. Coarse aggregate was coated with a thin layer of polystyrene to reduce paste-aggregate bond strength. The resulting concrete was compared to concrete containing uncoated control aggregate for strength, stiffness, and type and amount of microcracking. Large changes in interfacial paste-aggregate bond strength caused only small changes,
Properties of Structural Lightweight Aggregate Concrete,
09-10-2021· SFA aggregate is a good alternative to ordinary aggregates. Concrete based on SFA can be successfully used in elements with load-bearing functions. It is a pro-ecological product that perfectly fits the idea of sustainable development.
Investigating the Effects of Aggregate, - Scholar Commons
Scholar Commons Theses and Dissertations Spring 2020 Investigating the Effects of Aggregate Size and Reinforcement on ASR Cracking in Concrete Structures Studied with Different Evaluation Methods David Joseph Bianco Follow this and additional works at: https://scholarcommons.sc.edu/etd Part of the Civil and Environmental Engineering Commons
(PDF) Gradation of Aggregates and its Effects on,
Concrete is produced in greater amounts, as a result of this aggregate shortage The focus of this research was to see if ash can substitute for fine aggregates in concrete The sample was collected,
Effect of Lightweight Aggregate Impregnation on Selected,
29-11-2021· The impregnation of lightweight aggregate (LWA) is an alternative method to its pre-moistening, which is used to limit the loss of fresh concrete workability due to the aggregate’s ability to absorb a great amount of mixing water. The aim of this study was to access the effectiveness, by pre-coating LWAs with cement paste, in modifying the properties of
Recycled Concrete Aggregate Coefficient of Thermal,
01-01-2009· Despite a critical shortage of virgin aggregate, the availability of demolished concrete for use as recycled concrete aggregate (RCA) is increasing. Using this waste concrete as RCA conserves virgin aggregate, reduces the impact on landfills, decreases energy consumption, and can provide cost savings.
The effect of recycled aggregate concrete incorporating,
19-10-2016· Hence, a comparative analysis of the experimental results novel properties of fresh and hardened concrete with recycled concrete aggregates (RCA) with different substitution of waste paper sludge ash (WPSA) as a partial substitute for cement is presented in the paper. Recycled aggregates is made by crushing the waste concrete cube laboratory tests.
EFFECT OF RECYCLED CONCRETE AGGREGATE QUALITY ON,
14-07-2020· EFFECT OF RECYCLED CONCRETE AGGREGATE QUALITY ON PROPERTIES OF CONCRETE. a (Corresponding author), E-mail address: ali.mardani16@gmail . Journal of Green Building (2020) 15 (2): 57–69. Daniel Hatungimana, Şemsi Yazıcı, Ali Mardani-Aghabaglou; EFFECT OF RECYCLED CONCRETE AGGREGATE QUALITY ON
Effect of Aggregate, Cement, and Mineral Admixtures on the,
21-02-2011· Effect of Aggregate, Cement, and Mineral Admixtures on the Microstructure of the Transition Zone - Volume 114. Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our websites., View all Google Scholar citations for this article.
Effect of Paste-Aggregate Bond Strength on Behavior of,
Abstract. Coarse aggregate was coated with a thin layer of polystyrene to reduce paste-aggregate bond strength. The resulting concrete was compared to concrete containing uncoated control aggregate for strength, stiffness, and type and amount of microcracking. Large changes in interfacial paste-aggregate bond strength caused only small changes,
Recent Articles - Cement and Concrete Research - Journal,
Recent Articles. Microstructural developments of limestone calcined clay cement (LC3) pastes after long-term (3 years) hydration. Franco Zunino, Karen Scrivener Open Access March 31, 2022. On the carbonation of brucite: Effects of Mg-acetate on the precipitation of hydrated magnesium carbonates in aqueous environment
