Estimation of Reaction Heat in Ti-Bearing Blast Furnace Slag—Sulfuric Acid System Based on Mechanical Mixture Model

2021 ◽  
Author(s):  
Zhuoying Yang ◽  
Fan Yang ◽  
Meigui Yi ◽  
Lan Xiang
Keyword(s):  
Blast Furnace ◽  
Sulfuric Acid ◽  
Mixture Model ◽  
Blast Furnace Slag ◽  
Mechanical Mixture ◽  
Acid System ◽  
Reaction Heat ◽  
Furnace Slag

scholarly journals Sulfuric Acid Resistance of Concrete with Blast Furnace Slag Fine Aggregate

2014 ◽  
Vol 8 (11) ◽  
Author(s):  
Paweena Jariyathitipong ◽  
Kazuyoshi Hosotani ◽  
Takashi Fujii ◽  
Toshiki Ayano
Keyword(s):  
Blast Furnace ◽  
Sulfuric Acid ◽  
Blast Furnace Slag ◽  
Acid Resistance ◽  
Fine Aggregate ◽  
Furnace Slag

Durability of Blended PFA and POFA Geopolymer Concrete

2015 ◽  
Vol 754-755 ◽  
pp. 359-363
Author(s):  
M. Azreen ◽  
M.W. Hussin
Keyword(s):  
Blast Furnace ◽  
Sulfuric Acid ◽  
Structural Analysis ◽  
Blast Furnace Slag ◽  
Cement Industry ◽  
Supplementary Cementitious Materials ◽  
Palm Oil Fuel Ash ◽  
Sulfate Solutions ◽  
Fuel Ash ◽  
Furnace Slag

Ordinary Portland Cement (OPC) concrete is one of the most widely used construction materials globally, though its production in construction has negative environmental impact. About 0.9 ton of CO2is emitted for every one (1) ton of cement produced. In order to reduce the amount of CO2emission from cement industry, the utilization of supplementary cementitious materials such as pulverized fuel ash (PFA), blast-furnace slag and natural pozzolans is common and effective. Geopolymer is an inorganic binder material and can be produced by a geopolymeric reaction of alkali activating solution with silica and alumina rich source materials such as PFA and blast-furnace slag. In this study, the durability of concrete such as the resistance to sulfuric acid and sulfate solutions due to the effect of blended as of PFA and palm oil fuel ash (POFA), along with alkaline activators were investigated. Consequently, the optimum mix design of the blended ash geopolymer (BAG) concrete and OPC concrete specimens were prepared with water to cement ratio of 0.5 by mass as control. The micro structural analysis by X-ray diffraction (XRD) was done. BAG concrete showed better performance in 2% sulfuric acid and 5% sulfate solutions. From micro structural analysis, it was evident that BAG binder gel (N-A-SH) produced more durable material compared with C-S-H binder gel of OPC. The BAG concrete is strongly recommended to be used as an alternative to OPC concrete in addition to its environmental friendliness. Abundant PFA and POFA can be efficiently utilized to produce a high performance concrete.

scholarly journals The Resistance to Sulfuric Acid Attack in Cementitious Materials with Iron-blast-furnace Slag

2006 ◽  
Vol 44 (3) ◽  
pp. 19-25 ◽  
Author(s):  
M. Ichitsubo ◽  
T. Yamaguchi ◽  
I. Horiguchi ◽  
K. Takemura
Keyword(s):  
Blast Furnace ◽  
Sulfuric Acid ◽  
Blast Furnace Slag ◽  
Cementitious Materials ◽  
Acid Attack ◽  
Iron Blast Furnace ◽  
Furnace Slag

scholarly journals Severe Sulfuric Acid Attack on Self-Compacting Concrete with Granulometrically Optimized Blast-Furnace Slag-Comparison of Different Test Methods

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1431
Author(s):  
Sara Irico ◽  
Laurence De Meyst ◽  
Dirk Qvaeschning ◽  
Maria Cruz Alonso ◽  
Kristina Villar ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Sulfuric Acid ◽  
Mass Loss ◽  
Blast Furnace Slag ◽  
Moderate Increase ◽  
Acid Attack ◽  
Slag Cement ◽  
Self Compacting Concrete ◽  
Acid Media ◽  
Furnace Slag

The corrosion by severe sulfuric acid attack at pH 2 of two self-compacting concrete (SCC) types that are based on ordinary Portland cement (OPC) and granulometrically optimized blast-furnace slag cement was evaluated by three complementary tests that were performed in different research institutes. The use of SCC is a smart and promising solution to improve the performance of concrete in an aggressive environment, especially regarding ready-mixed concrete applications, since good compaction is less dependent on workmanship. The relevance and practical advantages of the different test protocols and the influence of the experimental parameters are discussed. It appears that the frequency of renewing the acid solution during the exposure period is the main parameter that influences the mass loss and the rate of degradation, while the sample geometry and the ratio between the volume of solution and concrete surface area had no clear influence. Nevertheless, there was reasonable agreement between the methods regarding the magnitude of the concrete degradation (resulting in a mass loss of about 2.5 kg/m² in six months time). The use of granulometrically optimized slag cement provided a moderate increase of the concrete resistance against acid attack, and this practice might be recommended in order to increase the durability of structures exposed to sulfuric acid media. The fact that the difference in comparison with SCC-OPC was rather limited shows that the influence of the cement type becomes less relevant in the case of concrete with low w/c ratio and optimized concrete technology.

scholarly journals Effect of Fine Sand of Blast-Furnace Slag on Freeze and Thaw Resistance, Sulfate Resistance and Sulfuric Acid Resistance of Mortar

2017 ◽  
Vol 133 (7) ◽  
pp. 151-156
Author(s):  
Daiki NAKAMURA ◽  
Hidekazu YAMAMOTO ◽  
Yuto TANAKADATE ◽  
Shunsuke HANEHARA ◽  
Tetsuya OYAMADA
Keyword(s):  
Blast Furnace ◽  
Sulfuric Acid ◽  
Blast Furnace Slag ◽  
Acid Resistance ◽  
Fine Sand ◽  
Sulfate Resistance ◽  
Freeze And Thaw ◽  
Furnace Slag

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.

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