Reviewing the performance of concrete comprising recycled coarse aggregates using non-destructive tests

Gagan, G.S.; Singh, Navdeep

doi:10.1016/j.matpr.2023.07.026

Cited by 2 publications

(4 citation statements)

References 9 publications

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“…This trend can be attributed to the presence of numerous cracks and pores inherent in the CDW aggregates, as illustrated in Figure 1. Consistent with these findings, Gagan and Singh [10] observed a similar trend, wherein increasing proportions of recycled aggregates led to decreased electrical resistivity values relative to the control concrete.…”

Section: Electrical Resistivitysupporting

confidence: 61%

“…Table 3 shows the classification of concrete under the electrical resistivity value. Additionally, various parameters, including the water-binder ratio, aggregate type, cement and supplementary cementitious material composition and quantity, moisture content, soluble salt concentration, and temperature exertion, significantly impact the electrical resistivity of concrete [10,37]. The ingress of chloride ions into the microstructure of concrete is a well-recognized precursor to steel corrosion within reinforced concrete structures [37].…”

Section: Testing Proceduresmentioning

confidence: 99%

“…Therefore, the resource utilization of CDW has become an urgent issue that needs to be addressed. Many researchers and construction industry technicians have studied the comprehensive utilization of CDW to produce coarse aggregates, recycled fine aggregates, recycled powder, recycled garden soil, and other intermediate products and have investigated the application of recycled products in recycled concrete, mortar, blocks, bricks, road backfill materials, and other construction projects [5,[8][9][10][11]. The recycling and utilization value of CDW is enormous.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Demolition Concrete Waste on the Physical, Mechanical, and Durability Characteristics of Concrete

Tang,

Cao,

Luo

et al. 2024

Buildings

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With the development of urbanization, more and more construction and demolition waste (CDW) is generated. To enhance the mechanical properties and durability of concrete through the incorporation of recycled aggregate, the water/cement ratio was controlled to optimize the properties of concrete. In this work, one reference concrete with a water/cement ratio of 0.5 was prepared. The demolition concrete waste from East China was used, and 50% and 100% of the natural aggregates of the reference concrete were substituted. Furthermore, the water/cement ratio of concrete with 50% and 100% CDW was reduced to 0.3, and the superplasticizer was used to justify the workability of fresh concrete. Finally, the workability of fresh concrete was determined. After curing for 28 days, the density, water absorption, and resistance to chloride penetration of concrete were realized. The compressive and flexural strength were examined at 14 and 28 days, and the electrical resistivity test was conducted at 7, 14, and 28 days. The results indicate that with increasing CDW content, the mechanical properties and durability of concrete decreased. However, when the water/cement ratio decreased to 0.3, the concrete properties were optimized, such as the compressive strength and resistance to chloride penetration of concrete with 50% CDW increased by 74.2% and 28%, respectively.

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Section: Electrical Resistivitysupporting

confidence: 61%

Section: Testing Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Effect of Demolition Concrete Waste on the Physical, Mechanical, and Durability Characteristics of Concrete

Tang,

Cao,

Luo

et al. 2024

Buildings

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show abstract

“…[57,126,127]. The evaluation method involves non-destructive testing techniques (such as ultrasonic and rebound hammer testing) and the direct examination of samples with material properties [128,129]. In this work, the effects of chloride ions, carbon dioxide and frost damage on the durability of concrete are mainly presented.…”

Section: Durabilitymentioning

confidence: 99%

Application of Aggregates from Construction and Demolition Wastes in Concrete: Review

Luo,

Aguiar,

Wan

et al. 2024

Sustainability

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In the current century, urbanization and the development of the construction industry have led to the generation of construction and demolition waste (CDW), imposing pressure on ecology and the environment. This has attracted the attention of industry personnel and researchers. This work discusses the current research on recycled coarse or fine aggregate, mainly focusing on the physical, mechanical and durability properties of sustainable concrete with recycled coarse or fine aggregate. Furthermore, it also summarizes CDW recycling and classification in major countries, the production processes of recycled aggregate, and the physical properties. This review will provide a reference for the application of concrete with recycled coarse or fine aggregate. Moreover, this review notes that replacing natural aggregates with both coarse and fine recycled aggregates awaits further experimental exploration.

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Reviewing the performance of concrete comprising recycled coarse aggregates using non-destructive tests

Cited by 2 publications

References 9 publications

The Effect of Demolition Concrete Waste on the Physical, Mechanical, and Durability Characteristics of Concrete

The Effect of Demolition Concrete Waste on the Physical, Mechanical, and Durability Characteristics of Concrete

Application of Aggregates from Construction and Demolition Wastes in Concrete: Review

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