Properties of Foundry Sand, Ground Granulated Blast Furnace Slag and Bottom Ash Based Geopolymers under Ambient Conditions

Janardhanan, Thaarrini; Ramasamy, V.

doi:10.3311/ppci.8014

Cited by 32 publications

(18 citation statements)

References 34 publications

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“…Boussaa et al [52] reported a thinner surface for solid WFS sample after leaching. This explains the lower UCS obtained for DFS geopolymers as [6,44,53,54]. The XRD analysis of WFS was predominated with quartz (SiO 2 ); this agrees with the elemental analysis results, which showed a relative proportion of 95.8 wt% for SiO 2 .…”

Section: Effect Of Psd On the Ucssupporting

confidence: 84%

Recovery of Silicon Dioxide from Waste Foundry Sand and Alkaline Activation of Desilicated Foundry Sand

Mashifana

Sithole

2020

J. Sustain. Metall.

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This study was conducted to recover silica (desilication) as a valuable metalloid from waste foundry sand (WFS) by a leaching process and to find application for desilicated foundry sand (DFS). The leaching time applied was 5 h; 3 M of potassium hydroxide (KOH) was used as a leaching reagent. The agitation speed of 200 rpm and the liquid/solid ratio of 25 were found to be the best conditions for optimum leaching results. A geopolymer from DFS was developed by using NaOH as an alkaline activator. The results obtained showed that the optimum conditions for the synthesis of a geopolymer were 15 M NaOH, 150 µm DFS particle size, and a curing temperature of 80 ℃ for 72 h. The geopolymer strength development was due to the formation of Phillipsite and Kalsilite as new hydration products. At the optimum alkaline solution concentration, the highest unconfined compressive strength (UCS) of 4.8 MPa was achieved. The developed geopolymer met the minimum strength requirements for load bearing material. This study provides an innovative and novel solution for the beneficiation of spent foundry sand and the recovery of a valuable metalloid, resulting to zero waste generation. Graphical Abstract

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Section: Effect Of Psd On the Ucssupporting

confidence: 84%

Recovery of Silicon Dioxide from Waste Foundry Sand and Alkaline Activation of Desilicated Foundry Sand

Mashifana

Sithole

2020

J. Sustain. Metall.

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“…The study in [51] aimed to develop an efficient pretreatment method of the surface of secondary rubber particles to enhance the sound insulation properties of a lightweight rubberized aggregate made of concrete. A lightweight concrete mix was prepared in this research by the lightweight clay expansion as a coarse aggregate and furnace bottom ash (FBA) as a fine aggregate [120]. Results showed that the overall noise reduction was 32.50 dB in the replacement of the entire FBA with recycled rubber aggregates, which a reduction substantially above 15.50 dB was already achieved by a control concrete mix made without rubber [19,[121][122][123].…”

Section: Cellular Concretementioning

confidence: 97%

Sound-Absorbing Acoustic Concretes: A Review

et al. 2021

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Noise is continuously treated as an annoyance to humans and indeed commotion contamination shows up within the environment, causing inconvenience. This is likewise interesting to the engineering tactic that inclines to develop this noise proliferation. The basics of the sound-retaining proliferation, sound-absorbing properties, and its variables were rarely considered by previous researchers. Thus, the acoustic performance and sound insulation of constructions have gained significance over the last five decades due to the trend for accommodating inner-city flat and multi-story residential building condominiums. Due to this dilemma, the proliferation of high-driven entertaining schemes has engaged extraordinary demands on building for its acoustic performance. Yet, construction industries worldwide have started to mainly use sound-absorbing concrete to reduce the frequency of sounds in opened-and-closed areas and increase sound insulation. As reported, the concrete acoustic properties generally rely on its density, exhibiting that the lighter ones, such as cellular concrete, will absorb more sound than high-density concretes. However, this paper has an objective to afford a wide-ranging review of sound-absorbing acoustic concretes, including the measurement techniques and insulation characteristics of building materials and the sound absorption properties of construction materials. It is also intended to extensively review to provide insights into the possible use of a typical sound-absorbing acoustic concrete in today’s building industry to enhance housing occupants’ efficiency, comfort, well-being, and safety.

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“…Farklı dayanım sınıflarında hazırlanan tüm jeopolimer karışımlarında daha düşük emilim oranları belirlenmiş ve ayrıca beton kalitesindeki artışla emilimin azaldığı bulunmuştur. WFS ilavesi, GPC'nin klorit ve sülfat saldırısına karşı daha iyi direnç gösterdiğini bildirmişlerdir [29].…”

Section: Wfs'nin çEşitli Endüstriyel Atık Bazlı Gpc'de Kullanımı üZerunclassified

Endüstriyel Atık Bazlı Jeopolimer Betonda Atık Döküm Kumunun Doğal Agrega Yerine İkame Edilerek Kullanımı Üzerine Bir Kaynak Taraması

Eren

2020

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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In this study, the effects of the use of waste foundry sands (WFS), which is an industrial waste type, by substituting natural fine aggregates in geopolymer concrete (GPC) were investigated Figure A. Formation scheme of geopolymer concrete Purpose: The main purpose of this study is to examine the literature studies on the basis of recycling and recovery process by reusing solid waste by-products such as WFS, fly ash, ground granulated blast furnace slag (GGBFS) in the GPC. Theory and Methods: In this study, the effects of the use of waste foundry sands (WFS), which is an industrial waste type, by substituting natural fine aggregates in geopolymer concrete (GPC) were investigated Results: As a result of the investigations, it has been determined that there are a limited number of studies in the literature on the use of WFS as a substitute for natural sand in various industrial waste-based GPCs. In these studies, it was revealed that the focus was mostly on mechanical properties and the compressive strength among mechanical properties was examined more. In addition, it was observed that different WFS optimum substitution rates were determined in determining the compressive strength of WFS substituted GPCs. It has been determined that WFS substitution decreases the overall cost, workability, water absorption, and sorptivity of GPC produced with various industrial wastes. It is reported that GPC produced with the addition of WFS has better resistance against acid and sulfate attack compared to conventional concrete. Conclusion: It is thought that a comprehensive investigation of features such as physical (freezethaw, thermal conductivity, TGA etc.), chemical (FT-IR etc.), mechanical (impact, hardness etc.), durability, microstructure and radiological, etc. of GPCs substituted with different ratios of WFS with interdisciplinary studies on subjects that have not been adequately researched in the literature will contribute to the literature in many ways. By taking advantage of the knowledge and experience obtained from the studies, it is thought that a great gain will be achieved in the direction of expanding the fields usage of WFS substituted industrial waste-based GPC, increasing its strength, reducing cost, providing a potential sustainable resource for GPC production, reducing disposal and disposal costs by evaluating wastes, protecting natural resources and minimizing the negative impact of cement that causes environmental pollution due to CO2 emission.

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Properties of Foundry Sand, Ground Granulated Blast Furnace Slag and Bottom Ash Based Geopolymers under Ambient Conditions

Abstract: Abstract

Cited by 32 publications

References 34 publications

Recovery of Silicon Dioxide from Waste Foundry Sand and Alkaline Activation of Desilicated Foundry Sand

Recovery of Silicon Dioxide from Waste Foundry Sand and Alkaline Activation of Desilicated Foundry Sand

Sound-Absorbing Acoustic Concretes: A Review

Endüstriyel Atık Bazlı Jeopolimer Betonda Atık Döküm Kumunun Doğal Agrega Yerine İkame Edilerek Kullanımı Üzerine Bir Kaynak Taraması

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