performance enhancement of recycled concrete aggregate a

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Performance enhancement of recycled concrete

Jan 20, 2016  Recycled concrete aggregate differ from natural aggregate as the former contains hardened cement mortar. The adhered cement mortar on recycled concrete aggregate has higher porosity and water absorption and lower strength than natural aggregate do. ... Performance enhancement of recycled concrete aggregates through carbonation. J. Mater. Civ ...

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Performance Enhancement of Recycled Concrete

Nov 11, 2015  The cement paste attached to natural aggregates has a significant effect on the quality of recycled concrete aggregates (RCAs) because it usually has higher porosity and lower strength than natural aggregates.

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Performance enhancement of recycled concrete

enhancing the properties of recycled concrete aggregate. This paper reviews the published enhancement methods for recycled concrete aggregate, and points out their advantages and disadvantages so ...

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Studies on performance enhancement of recycled

Aug 30, 2018  Studies on performance enhancement of recycled aggregate by incorporating bio and nano materials. ... (ITZ) of RA and recycled aggregate concrete (RAC).The improved RA showed reduction in water absorption (43% in non-ureolytic bacteria, 64% in ureolytic bacteria and 21% in nano modified RA) and increase in specific gravity (∼29% in non ...

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Study on Performance Enhancement of Recycled

Study on Performance Enhancement of Recycled Aggregate Permeable Concrete ... .Domestic and overseas scholars have preliminarily proved the feasibility of recycled aggregate applied to ordinary concrete.In this paper,recycled aggregate was mainly used in pervious concrete,in order to solve the problem of waste recycling and promote the ...

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Fresh-state performance of recycled aggregate concrete:

Jul 30, 2018  Abstract. This paper presents a literature review concerning the fresh properties of concrete containing recycled aggregates from beneficiated construction and demolition wastes. It starts with the identification of the main variables affecting the workability of concrete, such as the quality and moisture state of the recycled aggregates.

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INTERNATIONAL CONCRETE SUSTAINABILITY CONFERENCE

for Concrete Performance Enhancement, Tim Cost, Holcim, Inc. iii. ... Waste as Recycled Aggregate in Concrete, Tara Cavalline, Faculty Associate, Department of Engineering Technology and Construction Management, University of North Carolina, Charlotte iii.

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Performance Enhancement of Recycled Concrete Aggregates ...

Nov 11, 2015  The cement paste attached to natural aggregates has a significant effect on the quality of recycled concrete aggregates (RCAs) because it usually has higher porosity and lower strength than natural aggregates.

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Performance Enhancement of Recycled Concrete Aggregates ...

Mar 18, 2015  Performance Enhancement of Recycled Concrete Aggregates through Carbonation. ... Finally, the performance of recycled concrete aggregate can be

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Study on Performance Enhancement of Recycled Aggregate ...

Study on Performance Enhancement of Recycled Aggregate Permeable Concrete ... .Domestic and overseas scholars have preliminarily proved the feasibility of recycled aggregate applied to ordinary concrete.In this paper,recycled aggregate was mainly used in pervious concrete,in order to solve the problem of waste recycling and promote the ...

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Enhancement Treatment of Recycled Concrete Aggregate

Jul 22, 2021  Aggregate is an essential component in concrete, occupying 60–70% of the concrete by volume. Nevertheless, the application of natural aggregate (NA) is restricted due to the finite resources and long regeneration period. Recycled concrete aggregate (RCA), as common CD waste, has received widespread attention for its usage to replace NA.

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Treatment of recycled concrete aggregate to enhance ...

Nov 08, 2021  Evaluation on the mechanical performance of low-quality recycled aggregate through interface enhancement between cement matrix and coarse aggregate by surface modification technology International Journal of Concrete Structures and Materials , 10 ( 1 ) ( 2016 ) , pp. 87 - 97

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Compressive Mechanical Properties of a Novel Recycled ...

Nov 20, 2021  A novel recycled aggregate concrete was prepared by replacing the natural aggregate with recycled lightweight aggregate. Subsequently, the mechanical properties and compressive stress-strain constitutive relation of the recycled lightweight aggregate concrete (RLWAC) were explored. For this purpose, the recycled lightweight aggregate (RLWA) replacement ratio (0#x0025;, 25#x0025;,

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Study on the Effect of Recycled Coarse Aggregate on the ...

Nov 29, 2021  Shrinkage property is a significant indicator of the durability of concrete, and the shrinkage of green recycled concrete is particularly problematic. In this paper, construction waste was crushed and screened to generate simple-crushed recycled coarse aggregate (SCRCA). The SCRCA was then subjected to particle shaping to create primary particle-shaped recycled coarse aggregate

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Modification of recycled aggregate by spraying colloidal ...

Nov 16, 2021  In this study, different recycled coarse aggregate (RCA) modification methods, namely spraying colloidal nano silica (NS) with varying particle sizes and silica fume (SF) with a size of 420 nm on the surface of RCA, were utilized. Their efficiencies in enhancing the performance of recycled aggregate concrete (RAC) have been evaluated.

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characteristic of recycled aggregate - boulangerie-trets

Dec 06, 2019 The aim for this on – going project is to determine the strength characteristic of recycled aggregate for application in high strength structural concrete, which will give a better understanding on the properties of concrete with recycled aggregate, where can be an alternative material to coarse aggregate in structural concrete.

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Influence of nano-TiO2 addition on the environmental ...

Nov 30, 2021  Results indicate that nano-TiO2 addition on mortar mixtures enhances the sustainability of mortars with recycled concrete aggregates (RCA) to a greater extent than on mortars with natural aggregates. Indeed, a 0.5% nano-TiO2 addition highly decreased the global warming potential in mortars with RCAs, particularly with 100% RCA replacement.

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‪Wengui Li‬ - ‪Google Scholar‬

An overview of study on recycled aggregate concrete in China (1996–2011) J Xiao, W Li, Y Fan, X Huang. Construction and Building Materials 31, 364-383, 2012. 701: 2012: Performance enhancement of recycled concrete aggregate–a review. C Shi, Y Li, J Zhang, W Li, L Chong, Z Xie. Journal of Cleaner Production 112, 466-472, 2016. 440:

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‪Caijun Shi‬ - ‪Google Scholar‬

A review on ultra high performance concrete: Part I. Raw materials and mixture design. ... 2015: Performance enhancement of recycled concrete aggregate–a review. C Shi, Y Li, J Zhang, W Li, L Chong, Z Xie. Journal of cleaner production 112, 466-472, 2016. 440: 2016: Utilization of copper slag in cement and concrete. C Shi, C Meyer, A Behnood.

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Behavior of light-gauge steel beams filled with recycled ...

Recycled Concrete Aggregate (RCA) and Recycled Asphalt Pavement (RAP) are potential materials to replace natural aggregate (NA) in concrete mixes. RCA is obtained by crushing, washing, and grading concrete elements obtained from the demolition of old concrete structures while RAP is the aggregate from the base course layer obtained from ...

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Performance Enhancement of Recycled Concrete

Performance Enhancement of Recycled Concrete Aggregates through Carbonation Jiake Zhang, Ph.D., A.M.ASCE1; Caijun Shi, Ph.D.2; Yake Li3; Xiaoying Pan4; Chi

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Study on Performance Enhancement of Recycled Aggregate ...

Study on Performance Enhancement of Recycled Aggregate Permeable Concrete ... .Domestic and overseas scholars have preliminarily proved the feasibility of recycled aggregate applied to ordinary concrete.In this paper,recycled aggregate was mainly used in pervious concrete,in order to solve the problem of waste recycling and promote the ...

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Treatment of recycled concrete aggregate to enhance ...

Nov 08, 2021  The use of recycled concrete aggregates as an alternative aggregate material in concrete has been studied over the past two decades. It is now recognized that the recycled aggregate concrete (RAC ...

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Enhancement Treatment of Recycled Concrete Aggregate

Jul 22, 2021  Aggregate is an essential component in concrete, occupying 60–70% of the concrete by volume. Nevertheless, the application of natural aggregate (NA) is restricted due to the finite resources and long regeneration period. Recycled concrete aggregate (RCA), as common CD waste, has received widespread attention for its usage to replace NA.

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Mechanical Performance of Concrete Made with Recycled ...

Sep 15, 2020  This research aims at analysing the mechanical performance of concrete with recycled aggregates from concrete pavements. First, the characteristics of various natural and recycled aggregates used in the concrete were thoroughly analysed. The composition of the recycled aggregates was determined and several physical and chemical tests of the aggregates were

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Modification of recycled aggregate by spraying colloidal ...

Nov 16, 2021  In this study, different recycled coarse aggregate (RCA) modification methods, namely spraying colloidal nano silica (NS) with varying particle sizes and silica fume (SF) with a size of 420 nm on the surface of RCA, were utilized. Their efficiencies in enhancing the performance of recycled aggregate concrete (RAC) have been evaluated.

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Study on the Effect of Recycled Coarse Aggregate on the ...

Nov 29, 2021  Shrinkage property is a significant indicator of the durability of concrete, and the shrinkage of green recycled concrete is particularly problematic. In this paper, construction waste was crushed and screened to generate simple-crushed recycled coarse aggregate (SCRCA). The SCRCA was then subjected to particle shaping to create primary particle-shaped recycled coarse aggregate

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Performance Research and Analysis of Recycled Aggregate ...

Performance Research and Analysis of Recycled Aggregate Concrete for Construction WastesCN 孙晓瑜 西安建筑科技大学

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Mechanical and vegetation performance of porous concrete ...

1 天前  Porous concrete prepared in this study is a mixture of cement (C), recycled coarse aggregates (RA), water (W) and additive, without fine aggregates. The cement used is

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Effect of the Composition of Mixed Recycled Aggregates on ...

Recycled aggregates (RA) from construction and demolition waste are an alternative to natural aggregates in the construction sector. They are usually classified according to their composition. The main constituent materials are separated into the following categories: unbound natural aggregates, ceramic particles, cementitious particles, bituminous materials, and other materials considered ...

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characteristic of recycled aggregate - boulangerie-trets

Dec 06, 2019 The aim for this on – going project is to determine the strength characteristic of recycled aggregate for application in high strength structural concrete, which will give a better understanding on the properties of concrete with recycled aggregate, where can be an alternative material to coarse aggregate in structural concrete.

Get PriceEmail Inquiry

Influence of nano-TiO2 addition on the environmental ...

Nov 30, 2021  Results indicate that nano-TiO2 addition on mortar mixtures enhances the sustainability of mortars with recycled concrete aggregates (RCA) to a greater extent than on mortars with natural aggregates. Indeed, a 0.5% nano-TiO2 addition highly decreased the global warming potential in mortars with RCAs, particularly with 100% RCA replacement.

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The Hydration and Compressive Strength of Cement Mortar ...

Mar 28, 2021  Calcium acetate is the major component of the waste solution produced in treating recycled concrete aggregate (RCA) with acetic acid. Thus, the current work aims to explore the influence of calcium acetate solution on the performance of ordinary Portland cement. For this purpose, cement pastes and mortars were prepared using different concentrations, namely, 1, 2, and

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‪Caijun Shi‬ - ‪Google Scholar‬

A review on ultra high performance concrete: Part I. Raw materials and mixture design. ... 2015: Performance enhancement of recycled concrete aggregate–a review. C Shi, Y Li, J Zhang, W Li, L Chong, Z Xie. Journal of cleaner production 112, 466-472, 2016. 440: 2016: Utilization of copper slag in cement and concrete. C Shi, C Meyer, A Behnood.

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