scholarly journals Chemical durability of sintered glass-composite prepared from glass cullet and waste foundry sand

10.30544/477 ◽  
2020 ◽  
Author(s):  
Veljko Savić ◽  
Vladimir Topalović ◽  
Srđan Matijašević ◽  
Jelena Nikolić ◽  
Snežana Grujić ◽  
...  
Keyword(s):  
Glass Matrix ◽  
Raw Materials ◽  
Chemical Durability ◽  
Leaching Test ◽  
Sintering Process ◽  
Glass Cullet ◽  
Glass Composite ◽  
Foundry Sand ◽  
Sintered Glass ◽  
Waste Foundry Sand

In this study, the glass-composite was prepared using glass cullet and waste foundry sand as raw materials. The powder technology route was employed. The mixtures containing 10-50 wt% of the sand were sintered at T = 750 °C for t =1h. XRD and DTA analyses were performed. The chemical durability of the resulting glass-composite was determined by leaching test in HCl, H2SO4, NaOH and distilled water at T = 95 °C for t =1h. It was shown that the sintering process carried out without the crystallization of the glass matrix. The lowest chemical durability was determined in alkali solution of glass-composite.

Monitoring of Chemical Resistance of New Grouting Materials

2021 ◽  
Vol 898 ◽  
pp. 27-33
Author(s):  
Petr Figala ◽  
Rostislav Drochytka ◽  
Vit Černý ◽  
Radek Hermann ◽  
Jiří Kolísko
Keyword(s):  
Fly Ash ◽  
Chemical Resistance ◽  
Raw Materials ◽  
Waste Glass ◽  
Sulphate Solution ◽  
Sulphate Attack ◽  
Glass Waste ◽  
Foundry Sand ◽  
Waste Foundry Sand ◽  
Grouting Materials

This paper deals with the study of chemical resistance of new cement-based grout for invert grouting. The aim of this work is to verify new mixtures with specific admixtures. The study monitors resistance to external sulphate attack. Specimens were placed into sulphate solution 29.8 g∙l-1 (44 g∙l-1 Na2SO4) according to DIN19753 standard. Based on the results gained, new mixtures will be designed and optimized by addition of suitable secondary raw materials (fly ash, waste foundry sand, waste glass, waste filers).

scholarly journals High strength glass-ceramics sintered with coal gangue аs а raw material

2019 ◽  
Vol 51 (3) ◽  
pp. 285-294
Author(s):  
Dang Wei ◽  
H.-Y. He
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Glass Ceramics ◽  
High Strength ◽  
Coal Gangue ◽  
Raw Material ◽  
Sintering Process ◽  
Forming Process ◽  
Sintered Glass ◽  
Utilization Ratio

High strength lightweight glass-ceramics were fabricated with coal gangue and clay as main raw materials. The utilization ratio of coal gangue, the ratio of the coal gangue with clay, mineralization agents, forming process and sintering process on the properties of the fabricated glass-ceramics were optimized. The utilization ratio of coal gangue reached 75, and the ratio of coal gangue to clay was 3/1, as an optimal property was observed. The optimal sintering temperature was found to be 1370?C. At this optimal temperature, the sintered glass-ceramics showed the main phase of mullite and spindle and so showed high strength, low density, and low water absorbance. The appropriate amounts of codoping of the TiO2, ZnO, and MnO2/dolomite as mineralization agents obviously enhanced the properties of the glass-ceramics. Process optimizations further determined reasonable and optimal process parameters. The high strength lightweight glass-ceramics fabricated in this work may be very suitable for various applications including building materials, cooking ceramics, and proppant materials, et al.

scholarly journals Use of the Waste Foundry Sand in the Composition of Hot Sandy Dense Asphalt Concrete

2020 ◽  
Author(s):  
Kirill Yuryevich Tyuryukhanov ◽  
Konstantin Georgievich Pugin
Keyword(s):  
Elemental Composition ◽  
Asphalt Concrete ◽  
Building Materials ◽  
Raw Materials ◽  
Road Construction ◽  
Developed Countries ◽  
Raw Material ◽  
High Quality ◽  
Foundry Sand ◽  
Waste Foundry Sand

There is an increase in motorization worldwide, which in turn requires the construction of high-quality roads and highways. In both new construction and reconstruction of the pavement, large volumes of natural mineral materials are used, placing a large technogenic load on environmental objects during their extraction. In a number of regions of the Russian Federation, there are not sufficient volumes of conditioned raw materials for the production of high-quality composite building materials, such as asphalt concrete and cement concrete mixtures. The use of industrial waste in the composition of building materials addresses this issue while both solving environmental issues and reducing the cost of road construction. This article shows that developed countries successfully use the resource potential of waste in the production of building materials. This article proposes the use of waste foundry sand as the mineral raw material in the production of asphalt concrete. The article presents research on the following: geometric shape, elemental composition of the surface of the particles of the waste foundry sand; bitumen capacity; and the adhesion of bitumen. Based on the obtained data, a technology was developed for producing hot sandy asphalt concrete in which the waste foundry sand is used as a fine mineral aggregate. Physico-mechanical properties of the obtained samples of asphalt concrete satisfy the requirements established in GOST for asphalt concrete. Keywords: waste foundry sand, asphalt concrete, industrial material, elemental composition, bitumen

A multistakeholder approach and techno-economic analysis of a mechanical reclamation process for waste foundry sand in the Indian context

2021 ◽  
Vol 167 ◽  
pp. 105437
Author(s):  
Mohd Moiz Khan ◽  
S.M. Mahajani ◽  
G.N. Jadhav ◽  
Rohit Vishwakarma ◽  
Vithoba Malgaonkar ◽  
...  
Keyword(s):  
Economic Analysis ◽  
Foundry Sand ◽  
Indian Context ◽  
Waste Foundry Sand ◽  
Reclamation Process

scholarly journals Pressureless Sintering of YIG Ceramics from Coprecipitated Nanopowders

2021 ◽  
Vol 7 (5) ◽  
pp. 56
Author(s):  
Yimin Yang ◽  
Xiaoying Li ◽  
Ziyu Liu ◽  
Dianjun Hu ◽  
Xin Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Calcination Temperature ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Secondary Phase ◽  
Coprecipitation Method ◽  
Pressureless Sintering ◽  
Densification Behavior ◽  
Sintering Process

Nanoparticles prepared by the coprecipitation method were used as raw materials to fabricate Y3Fe5O12 (YIG) ceramics by air pressureless sintering. The synthesized YIG precursor was calcinated at 900–1100 °C for 4 h in air. The influences of the calcination temperature on the phase and morphology of the nanopowders were investigated in detail. The powders calcined at 1000–1100 °C retained the pure YIG phase. YIG ceramics were fabricated by sintering at 1200–1400 °C for 10 h, and its densification behavior was studied. YIG ceramics prepared by air sintering at 1250 °C from powders calcinated at 1000 °C have the highest in-line transmittance in the range of 1000-3000 nm. When the sintering temperature exceeds 1300 °C, the secondary phase appears in the YIG ceramics, which may be due to the loss of oxygen during the high-temperature sintering process, resulting in the conversion of Fe3+ into Fe2+.

Geotechnical behavior of a compacted waste foundry sand

2021 ◽  
Vol 277 ◽  
pp. 122267
Author(s):  
Marcelo Heidemann ◽  
Helena Paula Nierwinski ◽  
Daniel Hastenpflug ◽  
Breno Salgado Barra ◽  
Yader Guerrero Perez
Keyword(s):  
Foundry Sand ◽  
Waste Foundry Sand

Influence of Fungus on Properties of Concrete Made with Waste Foundry Sand

2013 ◽  
Vol 25 (4) ◽  
pp. 484-490 ◽  
Author(s):  
Gurdeep Kaur ◽  
Rafat Siddique ◽  
Anita Rajor
Keyword(s):  
Foundry Sand ◽  
Waste Foundry Sand
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