Experimental Studies on Utilization of Blast Furnace Slag for Cohesionless Soil

2021 ◽  
pp. 337-346
Author(s):  
Bhavin G. Buddhdev ◽  
M. V. Chauhan
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Experimental Studies ◽  
Cohesionless Soil ◽  
Furnace Slag

Al-rich pyroxene and melilite in a blast-furnace slag and a comparison with the Allende meteorite

1977 ◽  
Vol 41 (320) ◽  
pp. 493-499 ◽  
Author(s):  
B. C. M. Butler
Keyword(s):  
Blast Furnace ◽  
Atmospheric Pressure ◽  
Blast Furnace Slag ◽  
Experimental Studies ◽  
Furnace Slag

SummaryFassaitic diopside containing 22–23 wt% Al2O3 (approximately 41–43% calcium Tschermak's molecule, CaAl2SiO6) and melilite containing 69–43% gehlenite crystallized from a blast-furnace slag at atmospheric pressure between about 1450°C and 1250°C. The occurrence is of petrological interest because the association of pyroxene with gehlenite-rich melilite has not been recorded from experimental studies in the system CaO-MgO-Al2O3-SiO2, and because of the similarity of the compositions of both minerals to pyroxene and melilite in the Ca-Al-rich inclusions of the Allende meteorite.

Durability Performance of Cement Composites Containing Ground Granulated Blast Furnace Slag

2015 ◽  
Vol 1105 ◽  
pp. 26-30
Author(s):  
Martina Kovalcikova ◽  
Adriana Eštoková ◽  
Alena Luptáková
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Calcium Release ◽  
Experimental Studies ◽  
Concrete Mixture ◽  
Cement Matrix ◽  
Acidithiobacillus Thiooxidans ◽  
Granulated Blast Furnace Slag ◽  
Calcium Compounds ◽  
Furnace Slag

The hydraulic properties of granulated blast-furnace slags have been studied for nearly 200 years, and use of slag in mortars and concretes dates back more than a hundred years. The use of ground blast furnace slag, added as a replacement for a portion of the portland cement, has gained increasing acceptance in recent years. The effects of sulphur-oxidizing bacteria Acidithiobacillusthiooxidans on concrete mixture with addition of ground granulated blast furnace slag compared to mixture without any additives were investigated in laboratory over a period of 91 days. A laboratory study was conducted to comparison the performance of concrete samples in terms of a concrete deterioration influenced by the leaching of calcium compounds from the cement matrix. The changes in the elemental concentrations of calcium ions in leachates were measured by using X – ray fluorescence method. Experimental studies confirmed: bacteria Acidithiobacillus thiooxidans caused much intensive calcium release from the concrete matrices into the solution; the higher resistance of concrete mixture with 65 % wt. slag addition was not confirmed.

scholarly journals New Composite Material for Masonry Repair: Mortar Formulations and Experimental Studies

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 912
Author(s):  
Walid Deboucha ◽  
Ibrahim Alachek ◽  
Jean-Patrick Plassiard ◽  
Olivier Plé
Keyword(s):  
Experimental Study ◽  
Composite Material ◽  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Mechanical Performance ◽  
Experimental Studies ◽  
Uniaxial Tensile ◽  
Mineral Additives ◽  
Furnace Slag

The need for retrofitting existing masonry structures is progressively becoming more important due to their continuous deterioration or need to meet the current design requirements of Eurocodes. Textile-Reinforced Mortar (TRM) composite systems have emerged as a sustainable repair methodology suitable for structure retrofitting. Nevertheless, their mechanical performance is still far from being fully investigated. This paper presents an experimental study on the tensile and bond behaviors of a new mortar-based composite consisting of mineral additives, blended cement mortar, and stainless-steel grid. Three different mineral additives (silica fume, fly ash, and blast furnace slag), in binary and ternary systems were used. The experimental study included uniaxial tensile coupon testing on composite specimens and bond tests on composite material applied to clay-brick substrate. The results obtained with the different textile-reinforced cement-based mortars were compared and are discussed here. It was found that, for mortar formulations containing mineral additives—such as fly ash or blast-furnace slag—with high tensile and bond strengths, an adequate adherence between the constituents was obtained. The developed mortar presents mechanical performances equivalent to traditional mortars without additives. The study contributes to the existing knowledge regarding the structural behavior of TRM and promotes the development of a low impact carbon cementitious matrix.

scholarly journals Effect of Waste Ceramic Powder on Properties of Alkali-Activated Blast Furnace Slag Paste and Mortar

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2817
Author(s):  
Gui-Yu Zhang ◽  
Yong-Han Ahn ◽  
Run-Sheng Lin ◽  
Xiao-Yong Wang
Keyword(s):  
Diffusion Coefficient ◽  
Blast Furnace ◽  
Sulfuric Acid ◽  
Blast Furnace Slag ◽  
Ceramic Powder ◽  
Experimental Studies ◽  
Chloride Ions ◽  
Heat Of Hydration ◽  
Furnace Slag ◽  
Alkali Activated

Every year, ceramic tile factories and the iron smelting industry produce huge amounts of waste ceramic tiles and blast furnace slag (BFS), respectively. In the field of construction materials, this waste can be used as a raw material for binders, thus reducing landfill waste and mitigating environmental pollution. The purpose of this study was to mix waste ceramic powder (WCP) into BFS paste and mortar activated by sodium silicate and sodium hydroxide to study its effect on performance. BFS was partially replaced by WCP at the rate of 10–30% by weight. Some experimental studies were conducted on, for example, the fluidity, heat of hydration, compressive strength testing, ultrasonic pulse velocity (UPV), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), electrical resistivity, sulfuric acid attack, and chloride ion diffusion coefficient. Based on the results of these experiments, the conclusions are: (1) increasing the amount of waste ceramic powder in the mixture can improve the fluidity of the alkali-activated paste; (2) adding waste ceramic powder to the alkali-activated mortar can improve the resistance of the mortar to sulfuric acid; (3) adding waste ceramic powder to the alkali-activated mortar can increase the diffusion coefficient of chloride ions; (4) the early strength of alkali-activated mortar is affected by the Ca/Si ratio, while the later strength is affected by the change in the Si/Al ratio.

scholarly journals Mineral carbonation of metallurgical slags

Mineralogia ◽  
2015 ◽  
Vol 45 (1-2) ◽  
pp. 27-45 ◽  
Author(s):  
Monika Kasina ◽  
Piotr R. Kowalski ◽  
Marek Michalik
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Experimental Studies ◽  
Ambient Air ◽  
Mineral Carbonation ◽  
Steel Making ◽  
Metallurgical Slags ◽  
Metallurgical Processes ◽  
Furnace Slag ◽  
Potential Use

Abstract Due to increasing emissions of greenhouse gases into the atmosphere number of methods are being proposed to mitigate the risk of climate change. One of them is mineral carbonation. Blast furnace and steel making slags are co-products of metallurgical processes composed of minerals which represent appropriate source of cations required for mineral carbonation. Experimental studies were performed to determine the potential use of slags in this process. Obtained results indicate that steel making slag can be a useful material in CO2 capture procedures. Slag components dissolved in water are bonded as stable carbonates in the reaction with CO2 from ambient air. In case of blast furnace slag, the reaction is very slow and minerals are resistant to chemical changes. More time is needed for minerals dissolution and release of cations essential for carbonate crystallisation and thus makes blast furnace slags less favourable in comparison with steel making slag.

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