studies on thermochemical treatment of recycled concrete

Studies on thermo-chemical treatment of recycled concrete ...

10%  Apr 05, 2017  The results revealed that the thermo-chemical treatment experiences the satisfactory performances in improving the quality of recycled concrete fine aggregates and such treated recycled concrete fine aggregates used in concrete contribute to considerable improvement in strength characteristics.

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Studies on thermo-chemical treatment of recycled concrete ...

10%  The presence of cement paste is the most important factor affecting the quality of recycled concrete fine aggregates. This study aims to develop the thermo-chemical treatment for the purpose of removal of the cement paste adhering to recycled concrete fine aggregates. This study involves assessing the effectiveness of thermo-chemical treatment and comparing its efficiency with

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Studies on thermo-chemical treatment of recycled concrete ...

This study aims to develop the thermo-chemical treatment for the purpose of removal of the cement paste adhering to recycled concrete fine aggregates. This study involves assessing the...

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Studies on thermo-chemical treatment of recycled concrete ...

This study aims to develop the thermo-chemical treatment for the purpose of removal of the cement paste adhering to recycled concrete fine aggregates. This study involves assessing the effectiveness of thermo-chemical treatment and comparing its efficiency with thermal and chemical treatments.

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Chemico-thermal treatment for quality enhancement of ...

10%  May 29, 2019  Results of the study conducted to assess the effect of chemico-thermal treatment on the performance of recycled concrete fine aggregates in terms of their physical, chemical, mineralogical, and surface micro structure characteristics are presented. A comparison with the results of chemical and thermal treatment is also presented.

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A review on different treatment methods for enhancing the ...

Feb 10, 2020  It was concluded that the thermochemical treatment removes the cement paste to a greater extent. This study was conducted on recycled fine aggregate wherein the result showed 300 °C thermal load along with chemical treatment is the most efficient way to remove cement paste compared to other possible combinations.

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Characterization of Thermochemical Inactivation of ...

Feb 08, 2011  We believe that safe recycling of the mineral residues from asbestos thermochemical destruction can compensate partly for the treatment cost, be beneficial for the environment, and help actually treat asbestos containing wastes. Any economical treatment with a safe re-use scenario is worthwhile if it can prevent landfilling of asbestos waste.

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1,*, Christian Adam 1, Matthias Buchert 2 and Juergen Sutter

Jan 21, 2021  1 Division Thermochemical Residues Treatment and Resource Recovery (FB 4.4), ... Due to the large amounts and the material properties of concrete and concrete waste, several studies have been performed to use crushed concrete as environ-mentally friendly recycled concrete aggregates (RCA) [5]. These recycling procedures are

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Influence of fluidity on mechanical and permeation ...

Jul 20, 2019  Studies on thermochemical treatment of recycled concrete fine aggregates for use in concrete. J. Mater. Cycles Waste Manage. , 20 ( 1 ) ( 2017 ) , pp. 469 - 480

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Separation of clean aggregates from contaminated concrete ...

Reusing of fine particles of waste concrete (FPWC) is a disturbing problem for waste concrete recycling process. In this study, the FPWC developed from waste concrete was used as an innovative ...

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Quality Improvement Techniques for Recycled Concrete ...

Quality Improvement Techniques for Recycled Concrete Aggregate: A review Wafaa Mohamed Shaban1, ... this study conducts a review of the reported treatment techniques for RCA, identifying the applicability, limitations, ... able treatment methods for different applications, and to

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A Study on the Effect of Surface-Treated Coarse Recycled ...

This paper reports the experimental works performed to improve the properties of recycled concrete aggregate (RCA) by using different acid molarities at low concentration as agent for surface treatment. The effects of using RCA after treatment on the improvement in the strength of concrete were evaluated and compared. The findings reveal that this treatment can enhance the physical and ...

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REVIEW OF THERMOCHEMICAL CONVERSION PROCESSES

lumber, concrete, steel, aluminium, brick, for which complete and quantitative full life ... thermal processes and try to identify the most appropriate thermochemical disposal technology for CCA treated wood waste. First, a short overview of the different methods under study is given, ... 4. waste refining for recycling 5. waste treatment ...

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Chemical Recycling of Printed Circuit Board Waste by ...

Sep 15, 2015  Disposal of waste printed circuit boards is regarded as a potential major environmental problem due to their heavy metal content. Therefore, recycling waste printed circuit boards represents an opportunity to recover the high value resin chemicals and the high value metals that are present. In this study, the solvo-thermal depolymerisation of waste printed circuit boards obtained from desktop ...

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Use of Rubber Particles from Recycled Tires as Concrete ...

Use of Rubber Particles from Recycled Tires as Concrete Aggregate for Engineering Applications. Sara Sgobba. Related Papers. Utilization of Waste Tires in the Production of Non-Structural Portland Cement Concrete. By Amirah Chew. Properties of concrete prepared with waste tyre rubber particles of uniform and varying sizes.

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Transformations of Phosphorus Speciation during (Hydro ...

Abstract. Phosphorus (P) in animal manures is an important P pool for P recycling and reclamation. In recent years, thermochemical techniques have gained much interests for effective waste treatment and P recycling. This study comparatively characterized the transformation of P during two representative thermochemical treatments (pyrolysis and ...

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US10308784B2 - Thermochemical process for recovering ...

The invention relates to a pyrolysis process carried out in the presence of a controlled carbon dioxide environment that allows recovering both the organic portion and the inorganic portion (glass fibers) of a fiberglass-reinforced plastic waste, at an organic yield recovered even higher than 95% by weight and with a suitable for manufacturing new articles, in particular fiberglass-reinforced ...

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Rapports d'organisations : « Carbon fiber-reinforced ...

As an alternative to CFRP disposal three main methods of their recycling are currently known: thermal treatment, based on the thermal decomposition of the polymer matrix, thermochemical treatment, involving simultaneous exposure to temperatures and chemicals, as well as mechanical processing, consisting in crushing and grinding.

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Studies on thermo-chemical treatment of recycled concrete ...

This study aims to develop the thermo-chemical treatment for the purpose of removal of the cement paste adhering to recycled concrete fine aggregates. This study involves assessing the effectiveness of thermo-chemical treatment and comparing its efficiency with thermal and chemical treatments.

get price

REVIEW OF THERMOCHEMICAL CONVERSION PROCESSES

lumber, concrete, steel, aluminium, brick, for which complete and quantitative full life ... thermal processes and try to identify the most appropriate thermochemical disposal technology for CCA treated wood waste. First, a short overview of the different methods under study is given, ... 4. waste refining for recycling 5. waste treatment ...

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Wastewater Treatment Studies in Aggregate and Concrete ...

----- EPA-R2-73-003 February 1973 WASTEWATER TREATMENT STUDIES IN AGGREGATE AND CONCRETE PRODUCTION By Robert G. Monroe Project 12080 HBM (Project Officer Edward G. Shdo Environmental Protection Agency 1200 Sixth Avenue Seattle, Washington 98101 Prepared for OFFICE OF RESEARCH AND MONITORING U.S. ENVIRONMENTAL PROTECTION AGENCY

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Influence of different treatment methods on the mechanical ...

Nov 01, 2019  3.2. Treatment of RA. To obtain the carbonated recycled aggregates (C-RA), accelerated carbonation method [4,48] was adopted in this study.For this purpose, RA were first pre-conditioned at 25 °C and relative humidity of 50% for three days in order to provide RA with essential moisture content for accelerated carbonation i.e. 40–70% [48,49]. ...

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Construction and Demolition Waste Guide - Recycling and

Case studies 16 Introduction—infrastructure and buildings 16 ... 2008, p. 8) was 15.1 million tonnes, of which 7.6 million tonnes was recycled materials (timber, steel, concrete, rubble and soil) and 7.5 million tonnes was residual waste to landfill. In 2006–07, 43 777 000 tonnes of waste was generated, 38 per cent of which was from the CD ...

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Self Compacting Concrete with Recycled Coarse Aggregates

The study was carried out by replacing various percentages characteristics of SCC are a rapid rate of concrete placement (10%, 20%, 30%) of natural aggregates in SCC with recycled coarse aggregates and the properties of SCC were evaluated.

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Engineering Properties of Concrete with Waste Recycled ...

Oct 25, 2018  The compressive. strength of concrete with metalized plastic waste (MPW) fibers reduced as the percentages of fiber. content and length increased. Concrete mixes with 5 mm fiber length and 0.5% ...

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Towards CO2 Reduction in Repair, Demolition and Recycling ...

Article. Towards CO2 Reduction in Repair, Demolition and Recycling of Concrete Structures. January 2012; Concrete Journal 50(11):1006-1013

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Information Summary Asphalt Grindings / RAP (Recycled ...

Asphalt Grindings / RAP (Recycled Asphalt Pavement) Compiled by G.Keller 6/12/2013 WHAT IS RAP The definition most commonly used for asphalt millings or grindings is the fine particles (generally from dust to less than an inch or so) of bitumen and inorganic material that are produced by the mechanical grinding of bituminous concrete surfaces.

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Novel recycling of incinerated sewage sludge ash (ISSA ...

Jun 15, 2021  To date, many studies have been conducted using adsorption technology to remove heavy metal pollutants from wastewater (Hu et al., 2019). The widely studied adsorbents include activated carbon, clay minerals, and natural or modified biochar (Han et al., 2019). However, these materials have the disadvantage of high production costs and ...

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Characterization of Thermochemical Inactivation of ...

Feb 08, 2011  Read "Characterization of Thermochemical Inactivation of Asbestos Containing Wastes and Recycling the Mineral Residues in Cement Products, Waste and Biomass Valorization" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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A pyrolysis study for the thermal and kinetic ...

In this study, thermochemical conversion of plastic wastes (PET and PVC) together with an agricultural waste (hazelnut shell) was investigated. In order to determine the thermal and kinetic behaviours, pyrolysis experiments were carried out from room temperature to 800 °C, with a heating rate of 10 °C min-1 in the presence of a N2 atmosphere in a thermogravimetric analyzer...

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Case Studies in Construction Materials Journal ...

Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials and related Short Communications, specialising in actual case studies involving real construction projects. CSCM provides an

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US10308784B2 - Thermochemical process for recovering ...

The invention relates to a pyrolysis process carried out in the presence of a controlled carbon dioxide environment that allows recovering both the organic portion and the inorganic portion (glass fibers) of a fiberglass-reinforced plastic waste, at an organic yield recovered even higher than 95% by weight and with a suitable for manufacturing new articles, in particular fiberglass-reinforced ...

get price