Performance evaluation of recycled aggregate concrete incorporating limestone calcined clay cement (LC3)

Guo, Menghuan; Gong, Guoqiang; Yue, Yanchao; Xing, Feng; Zhou, Yingwu; Hu, Biao

doi:10.1016/j.jclepro.2022.132820

Cited by 31 publications

(10 citation statements)

References 64 publications

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“…The little Hc existence in B2 may be related to the restrictions of the carbonate transport ions by the blockage of the pore structure due to the Mc [ 46 , 47 ]. The Mc formation instead of the Hc due to the reaction of the LS compensated for the consumption of the CH by the Hc formation [ 48 ], which illustrated that the appropriate ratio of LS to the USL in the pastes improved the density of the concrete and also demonstrated the synergistic effect between the USL and LS.…”

Section: Resultsmentioning

confidence: 99%

The Synergistic Effects of Ultrafine Slag Powder and Limestone on the Rheology Behavior, Microstructure, and Fractal Features of Ultra-High Performance Concrete (UHPC)

et al. 2023

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This study investigated the effect of the interaction between ultrafine slag powder (USL) and limestone (LS) on the rheology behavior, microstructure, and fractal features of UHPC. The results indicated that B2 with mass ratio of 2:1 between the USL and LS obtained the highest compressive strength and the lowest yield stress. The combination of the USL and LS facilitated the cement hydration, ettringite, and monocarboaluminate (Mc) formation, as well as the increase in the polymerization of the C–S–H. The synergistic action between the USL and LS refined the pore structure due to the formation of the Mc, compensating for the consumption of the CH by the pozzolanic reaction, which provided a denser microstructure in the UHPC. The fractal dimension (Ds) of the UHPC was strongly related to the concrete pore structures and the compressive strength, which demonstrated that a new metric called the Ds value may be used to assess the synergistic effect of the UHPC.

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Section: Resultsmentioning

confidence: 99%

The Synergistic Effects of Ultrafine Slag Powder and Limestone on the Rheology Behavior, Microstructure, and Fractal Features of Ultra-High Performance Concrete (UHPC)

et al. 2023

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“…In addition to monadic binders, scholars have also studied the effects of binary or ternary SCMs. For example, as the most promising ternary alternative for traditional SCMs, limestone calcined clay cement (LC 3 ) was demonstrated to reduce the chloride penetrability of RAC by 70–90% [ 132 ]. Red mud (RM) is an industrial byproduct that alone does not have the ability to improve chloride resistance, but in combination with GGBFS shows excellent performance [ 49 ].…”

Section: Chloride Penetrationmentioning

confidence: 99%

“…Adapted from refs. [ 59 , 110 , 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 , 122 , 124 , 126 , 127 , 128 , 129 , 131 , 132 ].…”

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A Review of Chloride Penetration of Recycled Concrete with Enhancement Treatment and Service Life Prediction

Wang,

Liao,

Zhang

2024

Materials

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The application of recycled coarse aggregate (RA) in structural concrete can save non-renewable resources and reduce land occupation. Developing comprehensive knowledge of chloride penetration and service life modeling of recycled coarse aggregate concrete (RAC) is a prerequisite for practice. However, compared with the natural aggregate concrete (NAC), the inferior durability performance, especially chloride penetration resistance, of RAC hinders its application in structural concrete. Therefore, many RAC performance enhancement methods have been proposed. This paper presents a holistic review focused on the chloride penetration of RAC with/without enhancement methods and service life prediction. The current RAC performance enhancement methods are introduced. The improvement effect of the corresponding enhancement methods on the chloride penetration resistance of RAC are discussed and analyzed in turn. Based on the reviewed data on the chloride diffusion coefficient, the modification efficiencies of assorted enhancement methods are summarized. With the hope of promoting RAC application in structural concrete, the current literature on chloride-ingress-based service life prediction for RAC is also overviewed. In addition, the typical influencing factors on chloride transport properties are also discussed, i.e., RA quality. It can be concluded that enhancement techniques can effectively improve the chloride penetration resistance of RAC. The old mortar enhancement or removal methods can improve the chloride penetration resistance by 15–30%, depending on the specific treatment measures. The modification efficiency of the modifier material depends on the specific type and content of the incorporated substance, which ranges from approximately 5% to 95%. The estimated service life of RAC structures decreases with the increasing RA replacement ratio. Finally, concluding remarks are provided concerning future research on the chloride transport behavior of RAC.

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“…Nevertheless, the peak stress of concrete using seawater and sea sand could be enhanced by the incorporation of LC 3 . The reactive silica and alumina in calcined clay could react with the hydration product Ca(OH) 2 , and lead to the formation of C-A-S-H [ 46 ]. The aluminates in both calcined clay and cement could react with CaCO 3 from limestone to form mono- (Mc) and hemi-carboaluminates (Hc), and the carboaluminates transfer to Friedel’s salt when chloride ion exists in the hydration system [ 47 ].…”

Section: Mechanical Properties Of Concretementioning

confidence: 99%

Mechanical Performance and Constitutive Model Analysis of Concrete Using PE Fiber-Strengthened Recycled Coarse Aggregate

Zhou

Guan

et al. 2022

Polymers

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To promote the sustainable development of the construction industry, concrete incorporating polyethylene (PE) fiber-strengthened recycled coarse aggregate (SRCA) and seawater and sea sand (SWSS) is prepared. The usage of SRCA significantly improves the mechanical performance of concrete. The strength is improved, and the failure mode of concrete cylinders is also remarkably altered. The incorporation of SWSS that alleviates the shortage of freshwater and river sand slightly reduces the mechanical strength of concrete at 28 and 90 days, while the replacement of cement by 35% limestone calcined clay cement (LC3) overcomes this drawback. The compressive strength of concrete is further enhanced, and the pore structure is refined. The introduction of LC3 also promotes the formation of Friedel’s salt, which could improve the chloride binding capacity of concrete using SWSS. Furthermore, the stress-strain relationship of sustainable concrete is analyzed, and the experimental results are compared with the commonly used constitutive models. The predictive constitutive models are proposed to effectively describe the mechanical performance of sustainable concrete.

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Performance evaluation of recycled aggregate concrete incorporating limestone calcined clay cement (LC3)

Cited by 31 publications

References 64 publications

The Synergistic Effects of Ultrafine Slag Powder and Limestone on the Rheology Behavior, Microstructure, and Fractal Features of Ultra-High Performance Concrete (UHPC)

The Synergistic Effects of Ultrafine Slag Powder and Limestone on the Rheology Behavior, Microstructure, and Fractal Features of Ultra-High Performance Concrete (UHPC)

A Review of Chloride Penetration of Recycled Concrete with Enhancement Treatment and Service Life Prediction

Mechanical Performance and Constitutive Model Analysis of Concrete Using PE Fiber-Strengthened Recycled Coarse Aggregate

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