Durability and shrinkage of concrete with CDW as recycled aggregates: Benefits from superplasticizer’s incorporation and influence of CDW composition

Bravo, Miguel; Brito, Jorge de; Evangelista, Luís; Pacheco, João

doi:10.1016/j.conbuildmat.2018.02.176

Cited by 89 publications

(43 citation statements)

References 24 publications

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“…Various pilot projects have been implemented in countries such as China, the United States, Portugal, Germany, France, and Brazil with encouraging results [ 43 , 57 , 59 ]. Such use is becoming so widespread that several countries have developed or are developing normative documents to address the specificities of using recycled aggregates for concrete [ 93 , 94 ]. This conveys the significance of studies researching the suitability and performance levels of these residues in high-level recycled applications, i.e., structural concrete.…”

Section: Recycled Cdw Materials Applicationsmentioning

confidence: 99%

“…Over the last few years, CDW has been extensively studied for recycling and the application as aggregates for producing new concrete [ 74 , 92 , 94 , 95 , 96 ]. However, despite many types of research involving CDW for concrete production, there is still a lack of confidence in the construction sector about using the RA in real concrete applications because of its “poor” mechanical performance compared with natural aggregates.…”

Section: Recycled Cdw Materials Applicationsmentioning

confidence: 99%

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Current Applications of Recycled Aggregates from Construction and Demolition: A Review

et al. 2021

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A literature review comprising 163 publications published over a period of 26 years from 1992 to 2018 is presented in this paper. This review discusses the generation and recycling of construction and demolition waste (CDW) as well as its main uses as raw materials for the construction engineering sector. This review pays attention to the use of CDW aggregates for sand, pavements/roads, bricks, ceramics, cementitious materials, and concrete productions, as well its uses as eco-friendly materials for water decontamination. The physical-chemical and mechanical characteristics of recycled aggregates play an important role in their correctly chosen applications. The results found in this literature survey allow us to conclude that recycled aggregates from CDW can be successfully used to produce construction materials with quality comparable to those produced with natural aggregates. We concluded that the use of CDWs as raw materials for manufacturing new construction materials is technically feasible, economical, and constitutes an environmentally friendly approach for a future construction and demolition waste management strategy.

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Section: Recycled Cdw Materials Applicationsmentioning

confidence: 99%

Section: Recycled Cdw Materials Applicationsmentioning

confidence: 99%

Current Applications of Recycled Aggregates from Construction and Demolition: A Review

et al. 2021

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“…Most of them reported that using SP, by decreasing the water to cement ratio (w/c) and better dispersing the cement particles, can overcome the disadvantages due to the use of waste. Pereira et al [16], for instance, reported a higher compressive strength of concrete incorporating recycled aggregates and superplasticizers than that of the same concrete mix with no admixtures, while Bravo et al [19] concluded that superplasticizers are more effective on the shrinkage and durability properties of concrete produced with construction and demolition waste aggregates than that with concrete recycled aggregates. According to them, in some cases of chloride ingress, superplasticizers could not effectively improve the performance of concrete made with construction and demolition waste aggregates.…”

Section: Introductionmentioning

confidence: 99%

Performance of Concrete with Waste Granite Powder: The Effect of Superplasticizers

et al. 2018

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Granite stone is highly demanded by construction sector. In the processing stage, great amounts of waste powder are produced that can be used as cement replacement in concrete production. Reduced workability is the first problem of this replacement and it can be mitigated by using superplasticizers (SP). This study was carried out to limit the disadvantages related to waste granite powder (WGP) use through the use of SP. For this purpose, 19 concrete mixes containing various types of SP with different contents and WGP as cement replacement were appraised. Fresh concrete density, splitting tensile strength, electrical resistivity, compressive strength and resistance to sulphate attack tests were conducted. The mixes were assessed based on their environmental impact, economic, and mechanical performance. The results have shown that SP can eliminate most disadvantages caused by using stone waste, particularly negative effects on the mechanical properties. They can even improve some properties of concrete, including electrical resistivity by up to around 90%. Furthermore, the concrete mixes PT5, PF5, and PF10, which were made with both SP and stone waste, obtained the best results, with over 30% improvement in the multi-criteria evaluation index values compared to the mix W0 (reference mix). The proper use of WGP as replacement for cement would have environmental benefits and help the economy of the granite stone industry.

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“…The composition of the recycled aggregates affects the shrinkage more than the size of the aggregate fraction replaced. Superplasticizers does not enhance the shrinkage resistance of concrete with recycled aggregates sourced from construction and demolition wastes as that of recycled aggregates sourced from concrete [37]. In general, the curing age plays a key role in controlling the shrinkage of recycled aggregate concrete.…”

Section: Recycled Aggregate Concretementioning

confidence: 99%

Shrinkage Behavior of Conventional and Nonconventional Concrete: A Review

et al. 2020

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Concrete is indeed one of the most consumed construction materials all over the world. In spite of that, its behavior towards absolute volume change is still faced with uncertainties in terms of chemical and physical reactions at different stages of its life span, starting from the early time of hydration process, which depends on various factors including water/cement ratio, concrete proportioning and surrounding environmental conditions. This interest in understanding and defining the different types of shrinkage and the factors impacting each one is driven by the importance of these volumetric variations in determining the concrete permeability, which ultimately controls its durability. Many studies have shown that the total prevention of concrete from undergoing shrinkage is impractical. However, different practices have been used to control various types of shrinkage in concrete and limit its magnitude. This paper provides a detailed review of the major and latest findings regarding concrete shrinkage types, influencing parameters, and their impacts on concrete properties. Also, it discusses the efficiency of the available chemical and mineral admixtures in controlling the shrinkage of concrete.

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Durability and shrinkage of concrete with CDW as recycled aggregates: Benefits from superplasticizer’s incorporation and influence of CDW composition

Cited by 89 publications

References 24 publications

Current Applications of Recycled Aggregates from Construction and Demolition: A Review

Current Applications of Recycled Aggregates from Construction and Demolition: A Review

Performance of Concrete with Waste Granite Powder: The Effect of Superplasticizers

Shrinkage Behavior of Conventional and Nonconventional Concrete: A Review

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