Experimental evaluation of the high-grade properties of recycled concrete aggregates and their application in concrete road pavement construction

Kox, S.; Vanroelen, Giovanni; Herck, J. Van; Krem, H. de; Vandoren, Bram

doi:10.1016/j.cscm.2019.e00282

Cited by 29 publications

(23 citation statements)

References 17 publications

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“…The water absorption of the RMC-RA is determined to 8%, and the particle density 2.66 kg/dm 3 (Table 2). According to Kox et al [10], the main characteristic that separates Recycled Concrete Aggregate (RCA) from natural aggregate is water absorption. The WA of 12 different types of RCA was determined by Kox et al to an average of 3.2%, substantially higher than that of natural aggregate.…”

Section: Water Absorption (Wa) and Particle Density (ρParticle)mentioning

confidence: 99%

“…The FI of the RMC-RA was determined to a value of 2 (Table 2), based on testing the complete batch received. Kox et al [10] report FIs for the 21 different RCA materials in the range 3 to 15, averaging on 9. The flakiness index of processed aggregate is primarily a result of the crushing process.…”

Section: Flakiness Index (Fi)mentioning

confidence: 99%

“…The LA-value of the RMC-RA was determined through two parallel tests to an average value of 25 (Table 2). Kox et al [10] investigated a set of 21 "high grade" Recycled Concrete Aggregates (RCA), sampled from different origins and crushing processes. The "high-grade" sorting refers to this being an investigation on materials suitable for use in road building according to the Flemish "Standard Tender specification 250".…”

Section: Los Angeles (La) Valuementioning

confidence: 99%

See 2 more Smart Citations

From Waste to Resource – Utilising Residue from Ready-Made Concrete as New Aggregate

Adomako

Heimdal

Thorstensen

2021

Nordic Concrete Research

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A new admixture is available, to reduce the sludge produced from the cleansing of production and transportation equipment in the fresh concrete industry. The result is agglomerations of hardening concrete, that might be utilised for aggregate. Utilisation depends on adequate properties. This paper reports from investigations on the physical and mechanical properties of the aggregate and discussions on the performance relative to natural and recycled aggregates and towards requirements for utilisation. The findings indicate substantial potential for utilisation, supporting the reduction of waste for deposit and development of the concrete industry towards a circular economy.

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Section: Water Absorption (Wa) and Particle Density (ρParticle)mentioning

confidence: 99%

Section: Flakiness Index (Fi)mentioning

confidence: 99%

Section: Los Angeles (La) Valuementioning

confidence: 99%

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From Waste to Resource – Utilising Residue from Ready-Made Concrete as New Aggregate

Adomako

Heimdal

Thorstensen

2021

Nordic Concrete Research

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“…Other uses of the RCA include: roads substructures, earth dam construction [35][36][37], paving blocks and structural blocks and bricks manufacture [37,38], bituminous-aggregate mixes [39][40][41][42], road pavements [43], self-compacting concrete [44][45][46], polymer concrete [47], shotcrete [48,49], concrete exposed to elevated temperatures [50], soil stabilization [51], pervious concrete [52], reactive powder concrete [53], artificial reef formation [37].…”

Section: Introductionmentioning

confidence: 99%

Properties of Concrete with Recycled Concrete Aggregate Containing Metallurgical Sludge Waste

et al. 2020

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Sand has been considered to be something of an immeasurable quantity. There are many indications that this view is no longer valid and that the limiting of natural aggregates usage is doubly justified. Firstly, the extraction of natural aggregates is expensive and has a huge impact on the environment. The main issues in sand and gravel mining are the large areas that are affected, ground water level changes, illegal mining, unsuitability of desert and marine sand, and costs of transport. Secondly, metallurgical waste can be used as a substitute for natural aggregates. This is doubly beneficial—the waste is recycled and the use of natural aggregates is reduced. Waste is stored in landfills that take up large areas and there is also the possibility of ground and groundwater pollution by hazardous compounds. The research presented in this article focuses on the technological conditions of using metallurgical waste in its original form and as a component of recycled concrete aggregate (RCA). The use of metallurgical sludge waste or crushed or round RCA to produce concrete deteriorates the consistency and does not significantly affect the air content and density of the concrete mix. RCA lowers the density of hardened concrete. Metallurgical sludge waste or RCA usage adversely affect the absorbability and permeability of concrete. Concrete containing metallurgical sludge waste is of higher compressive strength after 7 and 28 days, with up to 60% of waste as a sand replacement. RCA concrete achieved higher compressive strength also.

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“…In Flanders (Belgium), up to 20% of coarse natural aggregates, as a component of concrete mixes, can be replaced with high-quality materials from recycling concrete aggregates [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Research on the Properties of Mineral–Cement Emulsion Mixtures Using Recycled Road Pavement Materials

2021

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The reduction in natural resources and aspects of environmental protection necessitate alternative uses of waste materials in the area of construction. Recycling is also observed in road construction where mineral–cement emulsion (MCE) mixtures are applied. The MCE mix is a conglomerate that can be used to make the base layer in road pavement structures. MCE mixes contain reclaimed asphalt from old, degraded road surfaces, aggregate improving the gradation, asphalt emulsion, and cement as a binder. The use of these ingredients, especially cement, can cause shrinkage and cracks in road layers. The article presents selected issues related to the problem of cracking in MCE mixtures. The authors of the study focused on reducing the cracking phenomenon in MCE mixes by using an innovative cement binder with recycled materials. The innovative cement binder based on dusty by-products from cement plants also contributes to the optimization of the recycling process in road surfaces. The research was carried out in the field of stiffness, fatigue life, crack resistance, and shrinkage analysis of mineral–cement emulsion mixes. It was found that it was possible to reduce the stiffness and the cracking in MCE mixes. The use of innovative binders will positively affect the durability of road pavements.

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Experimental evaluation of the high-grade properties of recycled concrete aggregates and their application in concrete road pavement construction

Cited by 29 publications

References 17 publications

From Waste to Resource – Utilising Residue from Ready-Made Concrete as New Aggregate

From Waste to Resource – Utilising Residue from Ready-Made Concrete as New Aggregate

Properties of Concrete with Recycled Concrete Aggregate Containing Metallurgical Sludge Waste

Research on the Properties of Mineral–Cement Emulsion Mixtures Using Recycled Road Pavement Materials

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