Searched for: subject%3A%22recycled%255C+concrete%255C+aggregates%22
(1 - 15 of 15)
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Akraa, Khaled (author)
The increasing demand for sand in the construction sector underscores the need for sustainable alternatives to natural sand. This bachelor's thesis explores the application of Fine Recycled Concrete Aggregate (fRCA) produced by Heating air and classification system (HAS) from the Concrete To Cement and Aggregate (C2CA) technology as a...
bachelor thesis 2023
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Nedeljković, Marija (author), Visser, Jeanette (author), Nijland, Timo G. (author), Valcke, Siska (author), Schlangen, Erik (author)
In the Netherlands, beside cement replacement with more green cement types, there is also an urgent need for alternative materials for natural sand in new concrete in order to make it circular. Furthermore, the recyclers have raised questions regarding upscaling and the potential of fine recycled concrete aggregates (fRCA) in structural concrete...
conference paper 2021
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Nedeljković, Marija (author), Visser, Jeanette (author), Nijland, Timo G. (author), Valcke, Siska (author), Schlangen, E. (author)
In the Netherlands, beside cement replacement with more green cement types, there is also an urgent need for alternative materials for natural sand in new concrete in order to make it circular. Furthermore, the recyclers have raised questions regarding upscaling and the potential of fine recycled concrete aggregates (fRCA) in structural concrete...
conference paper 2021
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Nedeljković, Marija (author), Visser, Jeanette (author), Šavija, B. (author), Valcke, Siska (author), Schlangen, E. (author)
This paper discusses the state-of-the-art of the fine recycled concrete aggregates (fRCA), focusing on their physical and chemical properties, engineering properties and durability of concretes with fRCA. Based on the systematic review of the published literature, it is impossible to deduce without any further research the guidelines and...
review 2021
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Nedeljković, Marija (author), Mylonas, Akis (author), Wiktor, Virginie (author), Schlangen, E. (author), Visser, Jeanette (author)
Fine recycled concrete aggregates (fRCA, 0–4 mm) are produced from demolished concrete structures and consist of natural aggregates and old cement mortar. The presence of old cement mortar has detrimental effect on the fresh properties and strength of new concrete. This study aims to investigate the working mechanism and effectiveness of...
journal article 2021
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Nedeljković, Marija (author), Visser, Jeanette (author), Nijland, Timo G. (author), Valcke, Siska (author), Schlangen, E. (author)
In circular concrete design, beside cement replacement with more environmentally friendly cement types, there is also an urgent need for sand replacement with fine recycled concrete aggregates (fRCA). The variations in physical and chemical properties of fRCA and lack of standards for their quality evaluation are the main reasons for not yet...
journal article 2021
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Ouyang, Xiaowei (author), Wang, Liquan (author), Xu, Shida (author), Ma, Yuwei (author), Ye, G. (author)
Carbonation treatment can effectively improve the performance of recycled concrete aggregate and fines due to the reactions of CO<sub>2</sub> with CH and C–S–H gel of cement paste. To better understand the mechanisms involved in the performance improvement, the surface properties of carbonated recycled cement paste powder (CRP) and its effect...
journal article 2020
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Braymand, Sandrine (author), Roux, Sébastien (author), Fares, Hanaa (author), Feugeas, Françoise (author)
Construction and demolition waste stream has generated news materials that may be reintroduced into new concrete, e.g. as recycled aggregates. The specific feature of recycled concrete aggregates (RCA) is the presence of hardened mortars influencing their behaviour. This study aims to distinguish processes that allow the complete separation and...
conference paper 2017
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Alexanian, S. (author), Hubert, F. (author), Buyle-Bodin, F. (author), Blanpain, O. (author)
The recycled concrete aggregates (RCA) produced by the demolition of old buildings seem to be an option in order to construct new buildings and to preserve the environment by the reusing of inert materials, reducing the resort to the natural materials and the disposal in landfills. Numerous countries are multiplying studies concerning this...
conference paper 2017
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Cazacliu, B. (author), Artoni, R. (author), Hamard, E. (author), Cothenet, A. (author)
In order to clarify the significance of Los Angeles test when being used with RCAs, three aspects were investigated: the influence of the number of revolutions, the evolution of the full particle size distribution and the distribution of mortar in the fractions after the test. The standard testing procedure for the Los Angeles index requires the...
conference paper 2017
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Gastaldi, D. (author), Canonico, F. (author)
Current concrete recycling consists of crushing waste concrete and use it again as aggregate for new concrete, according to specifications which are based on local regulations in different countries. Construction and demolition waste recycling is generally limited to the use of the coarser fraction as aggregate for new concrete. The quality of...
conference paper 2017
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Zhao, Zengfeng (author), Courard, Luc (author), Michel, Frédéric (author), Remond, Sébastien (author), Damidot, Denis (author)
Large amounts of construction and demolition wastes (C&DW) especially concrete wastes are generated annually and will increase in the future. Until now, only a small fraction of concrete wastes is re-used as recycled concrete aggregates (RCA) in the manufacture of concrete. In this paper, the feasibility of using RCA obtained from old concrete...
conference paper 2017
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de Larrard, F. (author), Colina, H. (author)
France is currently producing about 17 Mt/year of demolished concrete, most of this material being used in road subbase courses or embankments. However, this flow should increase in the near future, although less and less new roads are to be built. Another 20 Mt of mixed demolition materials, a good part of it being concrete or natural rock is...
conference paper 2017
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Prasittisopin, L. (author), Chaiyapoom, P. (author), Thongyothee, C. (author), Snguanyat, C. (author)
Recycled concrete aggregates (RCA) have been widely used as concrete aggregates in construction. This is due to economic and environmental benefits of using RCA in concrete. Unlike natural aggregate (NA), the use of RCA in concrete seems not promising to the users implementing it, especially in structural purposes. The RCA concrete is reported...
conference paper 2017
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Khoury, E. (author), Cazacliu, B. (author), Remond, S. (author)
Poor estimation of the water absorption coefficient (WA) of recycled concrete aggregates (RCA) engenders inadequate effective water for the recycled aggregate concrete (RAC), leading to poor mechanical properties or poor workability. Pre-saturation of RCA before mixing could appear as a potential technical solution. However, pre-saturation...
conference paper 2017
Searched for: subject%3A%22recycled%255C+concrete%255C+aggregates%22
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