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Recycling of concrete: Dehydration and reactivation of cement I Acknowledgements I would like to thank my supervisor Prof. Hubert Rahier for guiding me in these months, and Jorn Van De Sande and Eduarda Baptista for all the support and help. I would like to thank people from the Department of Physical Chemistry and Polymer Science
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May 01, 2013 1. Introduction. The cement and concrete industry faces an ever increasing demand to reduce its impact on the environment. Concrete is nowadays one of the most used manufactured materials, with worldwide production currently exceeding 20,000 million tons per year, as estimated from the 2.9 billion tons of Portland cement produced in 2009 .Therefore, small changes in concrete
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This recovery was found to be related to the regeneration of new hydration products, despite the eventual existence of unreacted cement left in old concrete [19]. The possible reactivation of the ...
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Jan 03, 2018 Susana Gil Sayas Recycling of concrete: Dehydration and reactivation of cement, ULB-VUB 2018 (June). Eduarda Baptista, Jun Gu, Hadi Kamyab, Nicole Dilissen, Marie-Paule Delplancke, Hubert Rahier Calculating activation energy of Portland cement blended with dehydrated cement by isothermal calorimetry , International Conference Sustainable ...
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Aug 01, 2008 The recycling of concrete wastes in construction has been investigated extensively in the past decades due to the environment pollution and exhaustion of natural resources. ... Cement Concrete Res, 35 (4) (2005), pp. 763-769. Article Download PDF View Record in Scopus ... Dehydration and rehydration processes of cement paste exposed to high ...
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Jan 15, 2019 Recycling of concrete: Dehydration and reactivation of cement: Otro titulo: Reciclaje de hormigón: deshidratación y reactivación de cemento: Autor: Gil Sayas, Susana: Director(es): Alcaina Miranda, María Isabel Iborra Clar, María Isabel Rahier, Hubert: Entidad UPV:
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This recovery was found to be related to the regeneration of new hydration products, despite the eventual existence of unreacted cement left in old concrete [19]. The possible reactivation of the ...
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Aug 01, 2008 The recycling of concrete wastes in construction has been investigated extensively in the past decades due to the environment pollution and exhaustion of natural resources. ... Cement Concrete Res, 35 (4) (2005), pp. 763-769. Article Download PDF View Record in Scopus ... Dehydration and rehydration processes of cement paste exposed to high ...
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Feb 15, 2021 2. Overview of recycled cement production. The first published work concerning the specific recovery of cementitious materials regarding cement recycling was probably presented by Splittgerber and Mueller [].The authors suggested exploring the inversion of cement hydration based on previous studies concerning the rehydration of hardened concrete subjected to fire temperatures.
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May 24, 2016 C2CA Concrete Recycling and Current Research Background. The C2CA (Concrete to Cement and Aggregate) concrete recycling process aims at a cost-effective system approach for recycling high-volume End Of Life (EOL) concrete streams into prime-grade aggregates and cement (see Figure 1) [6] .
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Hugo KELLER Recovery and study of the properties of the sand obtained from the fines from recycled concrete, Ecole polytechnique de Bruxelles 2020 ... Susana Gil Sayas Recycling of concrete: Dehydration and reactivation of cement, ULB-VUB 2018 (June). Eduarda ... (M-IPC) using hydrothermal post curing (HTPC), Cement and Concrete Research, 41 (1
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May 31, 2021 1. Introduction. Concrete is the most widespread construction material in the world. In 2017, around 45 million tons were used in Spain [] and its consumption worldwide was estimated at 10 billion tons [].With these data, it can be stated that concrete consumption equates to approximately 1.7 tons/year per person [].The main concrete component is cement, and the chemical and thermal
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The results show that mortars after the recycling process do not achieve the same properties as fresh or new mortars. But it is seen that the addition of slags and alkalis increases the reactivity of recycled cement, but the compressive strength obtained with alkalis is very low. ... Recycling of concrete: Dehydration and reactivation of cement ...
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Jun 11, 2020 Recycling cement and concrete wastes can reduce the impact derived from these sources, and, adding to the environmental benefit of a sound material cycle, this substitution can be economically viable due to the savings in energy and transportation that could be achieved [6] . Major concrete components must be processed separately in order to ...
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The mechanism of supplementary cementitious materials enhancing the water resistance of magnesium oxychloride cement (MOC): A comparison between pulverized fuel ash and incinerated sewage sludge ash. Cement Concrete Comp., 2020, 109, 103562.
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Recycling of concrete: Dehydration and reactivation of cement RiuNet UPV 5 ottobre 2018 This Master Thesis was written during an Erasmus+ stage in Belgium.
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Recycling of EVA Foam Waste as A Constituent of Lightweight Concrete Mixture for Construction Application. 2018. Ibrahim Elgady. Download Download PDF. Full PDF Package Download Full PDF Package. This Paper. A short summary of this paper. 32 Full PDFs related to this paper. Read Paper.
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Dec 08, 2021 As can be seen from the table, the same paved one kilometer of the base, the use of cement fly ash stabilized gravel material costs 766,328.8 yuan, while the use of cement fly ash stabilized steel slag-concrete recycled gravel material costs only 568,905.0 yuan, only consider raw materials, per km can save nearly 200,000 yuan.
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Compact Concrete Crushers - Recycle Material On-SiteRemote-operated. Track-mounted. Buy or rent compact mobile concrete crushers for performance, versatility, and
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Jan 15, 2019 Recycling of concrete: Dehydration and reactivation of cement: Otro titulo: Reciclaje de hormigón: deshidratación y reactivación de cemento: Autor: Gil Sayas, Susana: Director(es): Alcaina Miranda, María Isabel Iborra Clar, María Isabel Rahier, Hubert: Entidad UPV:
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Recycling of concrete and reactivation of cement. Recycling is one of the biggest issues in environmental protection today. At the institute attempts are being made to intelligently feed concrete into the recycling process. Generally, recycled concrete is crushed and then added to the new building concrete as a filler instead of gravel and sand.
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Feb 15, 2021 2. Overview of recycled cement production. The first published work concerning the specific recovery of cementitious materials regarding cement recycling was probably presented by Splittgerber and Mueller [].The authors suggested exploring the inversion of cement hydration based on previous studies concerning the rehydration of hardened concrete subjected to fire temperatures.
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The concrete was prepared using these aggregates with the water-cement ratio of 0.45, the compressive strength of the concrete in 28 days is 58.7 MPa, higher than that of ordinary concrete.
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This series of analysis can be widely used in other countries for investigating suitable recycling systems focusing on the cement and concrete industry as well as the applicability of each individual concrete recycling technology. 1. Introduction Concrete is widely used as
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ERC-TECH – “Effective Recycling Concrete Technology”, is a company based in the Czech Republic that provides the construction sector with know-how, licenses and products to reuse 100% of construction and demolition waste in concrete mixtures and other products suitable for use in various construction activities.. The company offers: a completely new system of processing and manufacturing ...
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Aug 01, 2015 The thermogravimetric analyses (TG/DSC) of the HCW and the corresponding X-ray Diffraction Pattern (XRPD) are shown in Fig. 1, Fig. 2 respectively. Fig. 1 shows that a first continuous weight loss starts already at 50–70 °C and continues up to 400 °C: this is due to the gradual water evaporation from the calcium silicate and aluminate hydrates, accounting for about 15–20% of the
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Currently, concrete recycling is widely used for aggregate extraction [1], though concrete fines which are a mix of aggregate and the hydrated cement paste are not a part of the recycling process [1].
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Oct 25, 2017 Concrete is, after water, the second most widely used material on the planet. The manufacturing of concrete generates about 4.5 percent of the world’s human-induced carbon dioxide emissions. Replacing even a small portion of concrete with irradiated plastic could thus help reduce the cement industry’s global carbon footprint.
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are generally unsuitable for recycling in traditional fields such as cement and concrete industries. Reactivation (induced by hydration) of the desulphurizing ability of the unconverted CaO in FBC ash is considered a viable pathway to ash utilization. This process mainly
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Oct 07, 2021 Raw materials. The cement used in this study is an ordinary Portland cement CEM I 52.5R. The fine recycled concrete aggregates (FRCA) were collected in recycling units, located in four areas of France which use different geological natural aggregates, namely mainly siliceous aggregates (0/4 mm fraction size) and silico-calcareous aggregates (0/6 mm fraction size).
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Abraham T. Gebremariam, Ali Vahidi, Francesco Di Maio, Somayeh Lotfi, and Peter Rem. Numerical modelling of the dehydration of waste concrete fines: An attempt to close the recycling loop. Proceedings HISER International Conference: Advances in Recycling and Management of Construction and Demolition Waste, 21-23 June 2017, Delft, The Netherlands.
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Feb 11, 2021 Waste concrete is the most predominant constituent material among construction and demolition waste. Current waste concrete recycling is limited to the use of recycled concrete aggregates as a road-base material and less as aggregates in new concrete mixes. Further, the production of recycled concrete aggregates results in the generation of a high amount of fines,
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Reactivation by water hydration of the desulphurizing ability of these residues is considered a viable mean for their recycling: besides Ca(OH)2, this process can generate other hydration products, such as ettringite. This paper is devoted to a comparison between
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