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Recycled Aggregate Durability

Recycled Aggregate Durability

(PDF) On the Durability of Recycled Aggregates Concrete ...

International Journal of Structural and Civil Engineering Research Vol. 6, No. 1, February 2017 On the Durability of Recycled Aggregates Concrete Moetaz M. El-Hawary Civil Engineering Department, Kuwait University, Kuwait, Kuwait Email: [email protected] Saud F. Al-Otaibib Kuwait Institute for Scientific Research, Kuwait, Kuwait Email: [email protected] Abstract—As increasing durability of ...

Durability of recycled aggregate concrete – A review ...

May 01, 2018 · Although the researches on recycled aggregate concrete (RAC) has been going on for nearly 70 years , the use of RA in concrete structures is still limited due to its long-term durability concerns. With the decrease of natural aggregate resources and the increase of waste concrete generation, RAC has become a hot research topic around the world.

(PDF) Durability of Recycled Aggregate Concrete: An Overview

In contrast, the natural coarse aggregates were replaced by recycled coarse aggregate using five different replacement percentages, i.e. 0 (R0), 30% (R30), 50% (R50), 70% (R70) and 100% (R100 ...

Strength and Durability Evaluation of Recycled Aggregate ...

May 14, 2015 · This paper discusses the suitability of producing concrete with 100 % recycled aggregate to meet durability and strength requirements for different applications. Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength and durability of concrete.

"Durability of Recycled Aggregate Concrete” | Request PDF

Durability performance of hardened concrete made with recycled aggregates as partial or full replacement of natural coarse aggregates is reported. Resistance to pure water and sulfate attack is ...

(PDF) On the Durability of Recycled Aggregates Concrete ...

International Journal of Structural and Civil Engineering Research Vol. 6, No. 1, February 2017 On the Durability of Recycled Aggregates Concrete Moetaz M. El-Hawary Civil Engineering Department, Kuwait University, Kuwait, Kuwait Email: [email protected] Saud F. Al-Otaibib Kuwait Institute for Scientific Research, Kuwait, Kuwait Email: [email protected] Abstract—As increasing durability of ...

(PDF) Durability of Recycled Aggregate Concrete: An Overview

In contrast, the natural coarse aggregates were replaced by recycled coarse aggregate using five different replacement percentages, i.e. 0 (R0), 30% (R30), 50% (R50), 70% (R70) and 100% (R100 ...

Strength and Durability Evaluation of Recycled Aggregate ...

May 14, 2015 · This paper discusses the suitability of producing concrete with 100 % recycled aggregate to meet durability and strength requirements for different applications. Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength and durability of concrete.

Durability of recycled aggregate concrete prepared with ...

Nov 01, 2017 · Study on strength and durability of concrete containing recycled coarse aggregate manufactured with various method Appl. Eng. Mater. , 287–290 ( Pts 1–4 ) ( 2011 ) , pp. 1015 - 1018 View Record in Scopus Google Scholar

Durability Studies on the Recycled Aggregate Concrete in ...

Jul 28, 2019 · Recycling the C&D waste into recycled aggregates (RA) is an effective method for reducing the amount of C&D wastes. Many studies on the properties of RA and the durability of recycled aggregate concrete (RAC) were conducted in China over the past decade.

Mechanical and Durability Properties of Recycled Aggregate ...

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), where natural aggregates are replaced with recycled concrete aggregates, is a promising technology for conserving natural resources and reducing the environmental impact of concrete.

Durability of a pavement foundation made from recycled ...

Jun 09, 2015 · To improve the durability of the mix, the recycled fines and used mortar from the recycled crushed aggregate can be removed. Additionally, cementitious admixtures such as fly ash, which have been proven to enhance the workability of fresh concrete and durability of hardened concrete, can be used as supplementary materials in the RAC base course.

Effects of the incorporation of recycled aggregate in the ...

Feb 10, 2018 · The present work seeks to verify the influence of the recycled aggregate on the durability of the concrete submitted to freeze-thaw cycles through the ultrasonic velocity pulse, mechanical resistance, relative dynamic modulus of elasticity, capillarity and apparent density and porosity. 2. Materials and methods2.1. Materials

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

Durability of concrete bearing polymer-treated mixed ...

Coating aggregate surfaces with polymers has yielded similar findings for recycled concrete durability. Junak and Sicakova [92] observed sorptivity in 28 d old concretes bearing geopolymer slurry-coated RCA to be 8 % lower than in concretes with untreated RCA, and 3 % lower in 90 d, 50 % lower in 180 d and 51 % lower in 360 d old materials.

Experimental investigation on the strength and durability ...

Nov 01, 2021 · Recycled coarse aggregate (RCA) was used at the 50% and 100% levels by replacing natural coarse aggregate (NCA). In addition, 10% weight of cement was replaced in bacterial recycled aggregate concrete (BRAC) mixes with microsilica (MS) and metakaolin (MK).

characteristic of recycled aggregate

Evaluation of the Characteristics of Recycled Aggregates . 18/06/2020 To use the aggregate generated by recycling plants in the production of concrete, it is essential to know its characteristics This paper aims to evaluate samples of recycled aggregates, both small and large, produced at two recycling plants located in the city of Campinas, SP, Brazil, comparing the results with parameters ...

Durability of Reinforced Concrete Incorporating Recycled ...

The research done to date has emphasized the influence of recycled concrete aggregate (RCA) on the workability and strength of the new concrete with little attention being paid to the behaviour in service. In contrast, the present study is focused on the durability of concrete containing RCA in reinforced structures.

复合侵蚀作用下再生混凝土耐久性的劣化机理研究 - 中国博士学位

The Durability and Deterioration Mechanism of Recycled Aggregate Concrete Subjected to Compound Erosion. 分页CAJ下载 分章PDF下载 整本CAJ下载 整本PDF下载 在线阅读 不支持迅雷等下载工具。如阅读文献显示异常,请 ...

(PDF) On the Durability of Recycled Aggregates Concrete ...

International Journal of Structural and Civil Engineering Research Vol. 6, No. 1, February 2017 On the Durability of Recycled Aggregates Concrete Moetaz M. El-Hawary Civil Engineering Department, Kuwait University, Kuwait, Kuwait Email: [email protected] Saud F. Al-Otaibib Kuwait Institute for Scientific Research, Kuwait, Kuwait Email: [email protected] Abstract—As increasing durability of ...

(PDF) Durability of recycled aggregate concrete | Miquel ...

The durability of the 33 34 concretes made with recycled aggregate is worse due to the intrinsic porosity of them. 35 36 These differences decrease for low w/c ratios, as in this case the most influential factor 37 38 is the low porosity obtained in the new improved cement paste.

Durability of recycled aggregate concrete using pozzolanic ...

Durability is defined as the capability of concrete to resist deterioration from an external environment [14]. Recycled aggregate is more porous compared to natural aggregate, increased porosity ...

Strength and Durability Evaluation of Recycled Aggregate ...

2.2 Properties of Recycled Aggregate Concrete Durability and other concrete properties are affected by the use of recycled aggregate in concrete mixes. Research efforts to introduce RA into the construction industry and to address their effects on properties could be classified to the following categories:

Mechanical Properties and Durability of Recycled Aggregate ...

Jun 30, 2021 · Therefore, this paper studied the mechanical properties and durability of recycled aggregate permeable concrete. At first, a few properties of the target material, including bulk density, moisture content, water absorption, compressive strength, and water permeability coefficient, were tested respectively. Then, based on the orthogonal test ...

Durability Assessment of Recycled Aggregate HVFA Concrete

The possibility of producing high-volume fly ash (HVFA) recycled aggregate concrete represents an important step towards the development of sustainable building materials. In fact, there is a growing need to reduce the use of non-renewable natural resources and, at the same time, to valorize industrial by-products, such as fly ash, that would otherwise be sent to the landfill.

Durability Indicators in High Absorption Recycled ...

Oct 04, 2015 · Durability indicators in recycled aggregate concrete. According to Table 6, it is possible to use up to 50% recycled coarse aggregate in 0.5 w/c mixtures to achieve acceptable durability conditions; higher replacement of coarse aggregate or mixtures with higher w/c ratio are not recommended. 9. Conclusions.

Durability Parameters of Reinforced Recycled Aggregate ...

Recycled concrete aggregate (RA) from pavement demolition was used to make concrete. Ten concrete mixtures with different replacement percentages of RA (coarse and fine) were made. The corrosion rate of steel and the electrical resistivity of concrete were determined on reinforced concrete specimens subjected to wetting-drying cycles (3.5% solution of NaCl).

Reliability-Based Analysis of Recycled Aggregate Concrete ...

Durability represents a crucial issue for evaluating safety and serviceability of reinforced concrete structures. Many studies have already focused on carbonation-induced corrosion of natural aggregate concrete (NAC) structures, leading to several prediction models to estimate carbonation depth. Less research is devoted instead on recycled aggregate concrete (RAC), about which limited ...

Durability of concrete bearing polymer-treated mixed ...

Coating aggregate surfaces with polymers has yielded similar findings for recycled concrete durability. Junak and Sicakova [92] observed sorptivity in 28 d old concretes bearing geopolymer slurry-coated RCA to be 8 % lower than in concretes with untreated RCA, and 3 % lower in 90 d, 50 % lower in 180 d and 51 % lower in 360 d old materials.

A Durability Test for Aggregates

A Durability Test for Aggregates F. N. HVEEM and TRAVIS W. SMITH Respectively, Materials and Research Engineer and Supervising Highway Engineer, Materials and Research Department, California Division of Highways, Sacramento The routine tests used in California to control the quality of aggregates, particularly bases and subbases, are grading, ...

characteristic of recycled aggregate

Evaluation of the Characteristics of Recycled Aggregates . 18/06/2020 To use the aggregate generated by recycling plants in the production of concrete, it is essential to know its characteristics This paper aims to evaluate samples of recycled aggregates, both small and large, produced at two recycling plants located in the city of Campinas, SP, Brazil, comparing the results with parameters ...

Treatment of recycled concrete aggregate to enhance ...

Abstract Recycled concrete aggregates (RCA) have received the attention of several researchers over the last few decades to overcome aggregate shortages and to push towards sustainable and environmental-friendly concrete. Nevertheless, utilizing recycled aggregates at a full replacement level may cause a reduction in its fresh, mechanical, and durability characteristics compared to concrete ...

复合侵蚀作用下再生混凝土耐久性的劣化机理研究 - 中国博士学位

The Durability and Deterioration Mechanism of Recycled Aggregate Concrete Subjected to Compound Erosion. 分页CAJ下载 分章PDF下载 整本CAJ下载 整本PDF下载 在线阅读 不支持迅雷等下载工具。如阅读文献显示异常,请 ...