Relevant bibliographies by topics / Concrete, fines, recycling, heat

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Concrete, fines, recycling, heat'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Concrete, fines, recycling, heat"

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Al-Otaibi, Saud, Moetaz El-Hawary, and Ali Abdul-Jaleel. "Recycling crushed concrete fines to produce lime–silica bricks." Proceedings of the Institution of Civil Engineers - Waste and Resource Management 163, no. 3 (August 2010): 123–27. http://dx.doi.org/10.1680/warm.2010.163.3.123.

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Soultana, Athanasia, Michael Galetakis, Anthoula Vasiliou, Konstantinos Komnitsas, and Despina Vamvuka. "Utilization of Upgraded Recycled Concrete Aggregates and Recycled Concrete Fines in Cement Mortars." Recent Progress in Materials 03, no. 03 (February 11, 2021): 1. http://dx.doi.org/10.21926/rpm.2103035.

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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, consisting mainly of cement paste particles. Hence, this study aims to produce the cement mortars using the upgraded recycled concrete aggregates (sand granulometry) for the total replacement of natural aggregates and recycled concrete fines activated through a thermal treatment method as a partial cement substitution material. Cement mortar specimens were tested for their compressive and flexural strength, density and water absorption performance. The results showed that the combined usage of upgraded recycled concrete sand for total replacement of primary crushed sand and recycled concrete fines as partial cement replacement material is a promising option to produce cement mortars.
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Hamza, Bensaci, Menadi Belkacem, Kenai Said, and Yahiaoui Walid. "Performance of self-compacting rubberized concrete." MATEC Web of Conferences 149 (2018): 01070. http://dx.doi.org/10.1051/matecconf/201814901070.

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Used tyre rubber wastes present a serious environmental problem of pollution and storage. The recycling of this waste in the industry of construction could be an appropriate solution to produce an eco-concrete and could contribute to the improvement of some of its properties. This paper aims to study the possibility of using tyre rubber waste as fine aggregate replacement in self-compacting concrete (SCC). Fines rubber particles of 0-2 mm of waste tyres were added SCC mixtures as a partial substitution of the total volume of sand at different percentages (5, 10, 15, 20 and 30%). The influence of fines rubber of used tyres on fresh and hardened properties of the SCC was investigated. The fresh properties of SCC were performed by using slump-flow, T50 flow time, L-box, V-funnel and segregation resistance tests. Characteristics of the hardened state were obtained by compressive strength and thermal conductivity. The experimental results showed that the inclusion of fines rubber in SCC decreases the workability, reduced its passing capacity and increases the possibility of blocking. A decrease in compressive strength is observed with the increase in rubber content. On the other hand, the incorporation of the rubber fines aggregates enhances in a remarkably way the thermal conductivity.
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Topič, Jaroslav, and Zdenek Prošek. "PROPERTIES AND MICROSTRUCTURE OF CEMENT PASTE INCLUDING RECYCLED CONCRETE POWDER." Acta Polytechnica 57, no. 1 (February 28, 2017): 49–57. http://dx.doi.org/10.14311/ap.2017.57.0049.

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The disposal and further recycling of concrete is being investigated worldwide, because the issue of complete recycling has not yet been fully resolved. A fundamental difficulty faced by researchers is the reuse of the recycled concrete fines which are very small (&lt; 1 mm). Currently, full recycling of such waste fine fractions is highly energy intensive and resulting in production of CO<sub>2</sub>. Because of this, the only recycling methods that can be considered as sustainable and environmentally friendly are those which involve recycled concrete powder (RCP) in its raw form. This article investigates the performance of RCP with the grain size &lt; 0.25 mm as a potential binder replacement, and also as a microfiller in cement-based composites. Here, the RCP properties are assessed, including how mechanical properties and the microstructure are influenced by increasing the amount of the RCP in a cement paste (≤ 25 wt%).
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Chen, Jia J., and Albert K. H. Kwan. "Adding limestone fines to reduce heat generation of curing concrete." Magazine of Concrete Research 64, no. 12 (December 2012): 1101–11. http://dx.doi.org/10.1680/macr.11.00193.

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Lotfi, Somayeh, and Peter Rem. "Recycling of End of Life Concrete Fines into Hardened Cement and Clean Sand." Journal of Environmental Protection 07, no. 06 (2016): 934–50. http://dx.doi.org/10.4236/jep.2016.76083.

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Chen, Ying-Liang, Juu-En Chang, Yi-Chieh Lai, Ming-Sheng Ko, and Yi-Hsin Chen. "Recycling of steel slag fines for the production of autoclaved aerated concrete (AAC)." ce/papers 2, no. 4 (September 2018): 445–49. http://dx.doi.org/10.1002/cepa.849.

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Zhang, Ri Hua. "Experimental Research on the Separation and Recycle of Waste Concrete." Advanced Materials Research 450-451 (January 2012): 30–33. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.30.

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Concrete is the largest amount of artificial building materials in the world today. According to incomplete statistics, the construction waste produced in china each year can reach about one hundred million tons, and it can reach hundreds of millions of tons due to the long accumulation, which has become a serious social and environmental issues. In this paper, the technology of separation and recycle of waste concrete is studied, and the components of waste concrete are separated effectively, which provides a technical guarantee for the recycling of waste concrete. The waste concrete is disposed through the process of crushing, shelling and sieving and so on, the coarse aggregate and fine aggregate are separated effectively, the properties of coarse aggregate are nearly the same as natural aggregate. When the shelled fines is milled into ultrafine powder and used as concrete admixture, the performance of concrete can be improved. These all provide a new effective way for the recycling of waste concrete.
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Hoffmann Sampaio, Carlos, Bogdan G. Cazacliu, Weslei Monteiro Ambrós, Márcio André Kronbauer, Rejane MC Tubino, Denise CC Dal Molin, Josep Oliva, Gérson L. Miltzarek, Regis P. Waskow, and Viviane LG dos Santos. "Demolished concretes recycling by the use of pneumatic jigs." Waste Management & Research: The Journal for a Sustainable Circular Economy 38, no. 4 (February 12, 2020): 392–99. http://dx.doi.org/10.1177/0734242x20902835.

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Large quantities of construction and demolition waste is generated annually around the world. Part of this material is processed in recycling plants. After removing metals, fines and lights, the construction and demolition waste is crushed and sized and can be used as aggregates for low resistance concrete, for road sub-base, city landfill and other low value-added applications. For their use as coarse aggregate in structural concretes, construction and demolition waste must exhibit high densities and regularity of the material. This material usually is presented in demolished concretes. About 20% of the particles from demolished concretes can be used as coarse aggregates substituting part of natural aggregates in structural concretes. This article presents studies of demolished concretes recycling by the use of a pneumatic jig. All jigging tests were carried out with three different concretes produced in three strength classes: C16/20, ordinary concrete; C50/60, high strength concrete; and C70/85, very high strength concrete. Based on density distribution of the three concretes, there are reasonable masses with densities over 2.7 g cm−3, particle density considered appropriate to the used as coarse aggregate for structural concretes. The concretes present different mass recoveries of the denser particles (different liberation). Coarse aggregates can be recovered with reasonable masses by the use of air jigs: About 65% for high strength concretes and about 75% for the low strength concrete. The jigging concentration efficiency depends on the concrete liberation, density and size distribution.
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Anastasiou, Eleftherios, Michail Papachristoforou, Dimitrios Anesiadis, Konstantinos Zafeiridis, and Eirini-Chrysanthi Tsardaka. "Investigation of the Use of Recycled Concrete Aggregates Originating from a Single Ready-Mix Concrete Plant." Applied Sciences 8, no. 11 (November 3, 2018): 2149. http://dx.doi.org/10.3390/app8112149.

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The waste produced from ready-mixed concrete (RMC) industries poses an environmental challenge regarding recycling. Three different waste products form RMC plants were investigated for use as recycled aggregates in construction applications. Crushed hardened concrete from test specimens of at least 40 MPa compressive strength (HR) and crushed hardened concrete from returned concrete (CR) were tested for their suitability as concrete aggregates and then used as fine and coarse aggregate in new concrete mixtures. In addition, cement sludge fines (CSF) originating from the washing of concrete trucks were tested for their properties as filler for construction applications. Then, CSF was used at 10% and 20% replacement rates as a cement replacement for mortar production and as an additive for soil stabilization. The results show that, although there is some reduction in the properties of the resulting concrete, both HR and CR can be considered good-quality recycled aggregates, especially when the coarse fraction is used. Furthermore, HR performs considerably better than CR both as coarse and as fine aggregate. CSF seems to be a fine material with good properties as a filler, provided that it is properly crushed and sieved through a 75 μm sieve.
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Dissertations / Theses on the topic "Concrete, fines, recycling, heat"

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Di, Domenica Eleonora. "Recycling of end of life concrete fines (0 - 4 mm) into silica and cement." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8622/.

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The purpose of this work is to find a methodology in order to make possible the recycling of fines (0 - 4 mm) in the Construction and Demolition Waste (CDW) process. At the moment this fraction is a not desired by-product: it has high contaminant content, it has to be separated from the coarse fraction, because of its high water absorption which can affect the properties of the concrete. In fact, in some countries the use of fines recycled aggregates is highly restricted or even banned. This work is placed inside the European project C2CA (from Concrete to Cement and Clean Aggregates) and it has been held in the Faculty of Civil Engineering and Geosciences of the Technical University of Delft, in particular, in the laboratory of Resources And Recycling. This research proposes some procedures in order to close the loop of the entire recycling process. After the classification done by ADR (Advanced Dry Recovery) the two fractions "airknife" and "rotor" (that together constitute the fraction 0 - 4 mm) are inserted in a new machine that works at high temperatures. The temperatures analysed in this research are 600 °C and 750 °C, cause at that temperature it is supposed that the cement bounds become very weak. The final goal is "to clean" the coarse fraction (0,250 - 4 mm) from the cement still attached to the sand and try to concentrate the cement paste in the fraction 0 - 0,250 mm. This new set-up is able to dry the material in very few seconds, divide it into two fractions (the coarse one and the fine one) thanks to the air and increase the amount of fines (0 - 0,250 mm) promoting the attrition between the particles through a vibration device. The coarse fraction is then processed in a ball mill in order to improve the result and reach the final goal. Thanks to the high temperature it is possible to markedly reduce the milling time. The sand 0 - 2 mm, after being heated and milled is used to replace 100% of norm sand in mortar production. The results are very promising: the mortar made with recycled sand reaches an early strength, in fact the increment with respect to the mortar made with norm sand is 20% after three days and 7% after seven days. With this research it has been demonstrated that once the temperature is increased it is possible to obtain a clean coarse fraction (0,250 - 4 mm), free from cement paste that is concentrated in the fine fraction 0 - 0,250 mm. The milling time and the drying time can be largely reduced. The recycled sand shows better performance in terms of mechanical properties with respect to the natural one.
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Book chapters on the topic "Concrete, fines, recycling, heat"

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Lotfi, Somayeh, and Peter Rem. "Recycling of End of Life Concrete Fines (0–4 mm) from Waste to Valuable Resources." In High Tech Concrete: Where Technology and Engineering Meet, 224–32. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59471-2_28.

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"Use of crushed concrete fines for other purposes than production of new concrete." In Recycling of Demolished Concrete and Masonry, 120–24. CRC Press, 1992. http://dx.doi.org/10.1201/9781482267075-18.

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Johnson, D. C., N. J. Coleman, J. Lane, C. D. Hills, and A. B. Poole. "A preliminary investigation of the removal of heavy metal species from aqueous media using crushed concrete fines." In Waste Materials in Construction Wascon 2000 - Proceedings of the International Conference on the Science and Engineering of Recycling for Environmental Protection, Harrogate, England 31 May, 1–2 June 2000, 1044–49. Elsevier, 2000. http://dx.doi.org/10.1016/s0713-2743(00)80113-0.

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Conference papers on the topic "Concrete, fines, recycling, heat"

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Martinkauppi, J. B., T. Syrjala, A. Makiranta, and E. Hiltunen. "Some Aspects of Recycling Concrete Crush for Thermal Heat Storage." In 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA). IEEE, 2018. http://dx.doi.org/10.1109/icrera.2018.8566981.

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You might also be interested in the extended bibliographies on the topic 'Concrete, fines, recycling, heat' for particular source types:
Journal articles
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