Durability Studies on the Recycled Aggregate Concrete in China over the Past Decade: A Review

Ma, Zhiming; T, Qin; Yang, Dingyi; Ba, Guangzhong

doi:10.1155/2019/4073130

Cited by 28 publications

(17 citation statements)

References 57 publications

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“…The corrosion resistance was not influenced by the high permeability, low density and low mechanical resistance of the GC with which the M100-S-304 specimen was made. By data fitting, the durability properties generally decrease linearly with the increase of RCA replacement and the average water absorption rate [ 103 ]. The concrete containing NA and RCA showed a carbonation rate of 1.8 times higher [ 104 ].…”

Section: Resultsmentioning

confidence: 99%

Corrosion Behavior of Steel-Reinforced Green Concrete Containing Recycled Coarse Aggregate Additions in Sulfate Media

et al. 2020

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Novel green concrete (GC) admixtures containing 50% and 100% recycled coarse aggregate (RCA) were manufactured according to the ACI 211.1 standard. The GC samples were reinforced with AISI 1080 carbon steel and AISI 304 stainless steel. Concrete samples were exposed to 3.5 wt.% Na2SO4 and control (DI-water) solutions. Electrochemical testing was assessed by corrosion potential (Ecorr) according to the ASTM C-876-15 standard and a linear polarization resistance (LPR) technique following ASTM G59-14. The compressive strength of the fully substituted GC decreased 51.5% compared to the control sample. Improved corrosion behavior was found for the specimens reinforced with AISI 304 SS; the corrosion current density (icorr) values of the fully substituted GC were found to be 0.01894 µA/cm2 after Day 364, a value associated with negligible corrosion. The 50% RCA specimen shows good corrosion behavior as well as a reduction in environmental impact. Although having lower mechanical properties, a less dense concrete matrix and high permeability, RCA green concrete presents an improved corrosion behavior thus being a promising approach to the higher pollutant conventional aggregates.

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Section: Resultsmentioning

confidence: 99%

Corrosion Behavior of Steel-Reinforced Green Concrete Containing Recycled Coarse Aggregate Additions in Sulfate Media

et al. 2020

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“…Abrasion is a durability property that causes damage on the surface of concrete and loss of durability in the course of time. Since the abrasion resistance is directly related with compressive strength of concrete, abrasion resistance may decrease with RFA content (Ma et al 2019). In literature, the abrasion properties of RFA-containing concretes have not been examined comprehensively.…”

Section: Durability Properties Abrasion On Hardened Concretementioning

confidence: 99%

Examining The Mechanical and Durability Properties of Concrete Containing Recycled Fine Aggregates Possessing Different Contamination Levels

Bayraktar¹,

Kaplan²

2021

Preprint

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Three types of recycled fine aggregates (RFA) possessing different contamination levels (washed – unwashed) were used in the present study. RFAs were used instead of natural fine aggregate (NFA) at the concentrations of 10%, 20%, 40%, and 80%. No significant negative characteristics were observed in green and hardened characteristics of concrete when using RFA at up to 80% concentration. However, using less-washed or unwashed RFA at 10% or 20% concentration is generally appropriate. The use of less-washed or unwashed RFAs at the concentration of 40% or more negatively affects the slump values of concrete. Especially the use of unwashed RFA at 80% concentration yielded more significant damages. The non-hydrated cement particles in the RFA show insemination or hardening acceleration behavior and affected the 7-day pressure strength of concrete at a higher level. However, together with the use of RA having a weak interface transition zone, the splitting tensile strength values of concretes more significantly decreased. In conclusion, it was determined that RFAs can be used up to 80% concentration after an appropriate washing procedure. From the aspect of costs, in order to prevent durability problems, it should not be used at any concentration higher than 20% without a washing procedure. From the aspect of protecting the sustainable environment and natural sources, it is very important to increase the use of RFAs in concrete production.

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“…These techniques have been demonstrated as being effective in mitigating the negative effects on durability of RAC, in terms of reduced resistance to chloride penetration, sulfate attack, carbonation penetration, and freeze-thaw cycles, attributed to the reasons outlined above (Zhu et al, 2016;Guo et al, 2018;Ma et al, 2019;Berredjem et al, 2020). The presence of higher CSH gel in RAC, because of higher binder content in the attached mortar, can also contribute to chloride binding (Guo et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Performance Assessment of Ultra-High Durability Concrete Produced From Recycled Ultra-High Durability Concrete

Borg

Cuenca

Garofalo

et al. 2021

Front. Built Environ.

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The purpose of the work reported in this paper is to assess the performance of recycled ultra-high durability concrete (R-UHDC), produced using different fractions of recycled aggregate obtained from crushed ultra-high durability concrete (UHDC), as a substitute for the natural aggregate. Four different recycled ultra-high durability concrete (R-UHDC) mixes were designed and manufactured with a reference mix based on the natural aggregate and three mixes with the natural aggregate replaced using recycled UHDC according to two percentage replacement values (50 and 100%). The effect of environmental degradation of the recycled parent concrete was also addressed, using recycled aggregates subjected to accelerated carbonation (replacement percentage equal to 50%). The work has been conducted in the framework of the activities of the Horizon 2020 ReSHEALience Project in ultra-high durability concrete. One key objective of the project was to formulate the concept and experimentally validate the performance of ultra-high durability concrete for structures and infrastructures exposed to extremely aggressive scenarios. The ReSHEALience consortium has defined UHDC as a “strain-hardening (fiber-reinforced) cementitious material with functionalizing micro- and nano-scale constituents especially added to deliver high durability in the cracked state under extremely aggressive exposure conditions.” In this context, the research was conducted to investigate the potential of recycling the UHDC mixes, developed and validated in previous research and employing them as a partial or even total replacement of the natural fine aggregate in the production of new UHDC. This supports the cradle-to-cradle approach in life cycle engineering applications. The research confirmed the effective regeneration of new UHDC based on the recycled aggregate obtained from crushed UHDC, attaining the required rheological characteristics, mechanical properties (compressive strength, flexural strength, and toughness), and durability performance (chloride penetration resistance, chloride migration, water capillary suction, and resistivity). This work is intended as the first step toward the sustainability assessment of the end of life of UHDC materials and structures and the potential of recycled UHDC for new structures and retrofit structural applications.

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Durability Studies on the Recycled Aggregate Concrete in China over the Past Decade: A Review

Cited by 28 publications

References 57 publications

Corrosion Behavior of Steel-Reinforced Green Concrete Containing Recycled Coarse Aggregate Additions in Sulfate Media

Corrosion Behavior of Steel-Reinforced Green Concrete Containing Recycled Coarse Aggregate Additions in Sulfate Media

Examining The Mechanical and Durability Properties of Concrete Containing Recycled Fine Aggregates Possessing Different Contamination Levels

Performance Assessment of Ultra-High Durability Concrete Produced From Recycled Ultra-High Durability Concrete

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