scholarly journals The influence of high alumina cement and disperse brown fused corundum ratio on the properties of mullite corundum concrete and samples from it

2017 ◽  
Vol 117 ◽  
pp. 76-83
Author(s):  
V. V. Martynenko ◽  
V. V. Primachenko ◽  
L. А. Babkina ◽  
L. K. Savina ◽  
L. M. Scherbak ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Specific Surface ◽  
Thermal Shock Resistance ◽  
Production Costs ◽  
High Alumina ◽  
Alumina Cement ◽  
High Alumina Cement ◽  
Corundum Concrete ◽  
Concrete Mix ◽  
Shock Resistance

The influence researches of high alumina cement brand of “VGTS-73” and disperse brown fused corundum ratio on the properties of mullite corundum concrete brand of “MКBС” have been carried out. As a result of carried out researches the expediency of amount decreasing of the high alumina cement brand of “VGTS-73” with specific surface area of 7000 cm2/g from 20 to 15 % and amount increasing of the disperse brown fused corundum from 10 to 15 % in the composition of mullite corundum concrete brand of “MКBС” has been determined. It promotes to strength increasing of samples from this concrete after thermal treatment at a temperature of 1450 оC by 44 % (from 104 up to 150 N/mm2), refractoriness by 60 оC (from 1660 up to 1720 оC) and thermal shock resistance by 30 % (from 7 up to 9 thermal cycles) at preservation of long working time of the concrete mix, as well as to decreasing of production costs. Manufacturing of the mullite corundum concrete brand of “MКBС” with improved composition was put into production at the PJSC “THE URIR NAMED AFTER A. S. BEREZHNOY”.

scholarly journals Effect investigation of the dispersion and type of fine-ground component, as well as the type of dispersing additives on the properties of low-cement periclase castable and samples from it

2018 ◽  
Vol 118 ◽  
pp. 69-86
Author(s):  
V. V. Primachenko ◽  
L. A. Babkina ◽  
I. V. Khonchik ◽  
L. N. Nikulina ◽  
T. G. Tishina ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
High Alumina ◽  
Technological Parameters ◽  
Grain Composition ◽  
Crushing Strength ◽  
Alumina Cement ◽  
High Alumina Cement ◽  
Cold Crushing Strength ◽  
The Impact ◽  
Sintered Periclase

Researches have been carried out, as well as technological parameters have been developed for obtaining of low-cement periclase castable and products from it based on sintered periclase, periclase scrap, high alumina cement and dispersing additives. The possibility of using as cement brand of “VGTS-73” of own production of JSC “URIR named after A. S. Berezhnoy”, as well as cement Gorkal-70 (Poland) is established. The dispersion of fine-ground component of charge (mainly periclase and in a small amount of high alumina cement) and the possibility of using Castament FS-10 + Castament FW-10 (Germany), SioxX-Mag (Norway) and Lithopix P 5 (Germany) are established. Castament FS-10 + FW-10 and SioxX-Mag are more effective in terms of obtaining periclase castable products with better service properties. The temperature of thermal treatment of unburned products (350 оC), the firing temperature of products (~ 1450 оC) and the possible application temperature of fired products (1580 оC and above) are established. The developed low-cement periclase castables and samples from them are characterized, depending on the used dispersing additives, by the following indicators of physicochemical properties: content, wt. %: MgO — 85—86, SiO2 — 2.0—6.0, CaO — 1.5—2.5, Fe2O3 — not more than 2.0; grain composition, mm — 6—0; open porosity of the samples after thermal treatment at temperatures of 350 and 1450 оC is 20.3—23.0 and 18.8—22.8 %, respectively; apparent density of the samples after thermal treatment at temperatures of 350 and 1450 оC is 2.63—2.69 and 2.74—2.86 g/cm3, respectively; cold crushing strength of the samples after thermal treatment at 350, 1450 and 1580 оC — 19—38, 31—65 and 29—72 N/mm2, respectively; refractoriness under a load of 0.2 N/mm2 of the samples after thermal treatment at 1450 оC is 1450—1470 оC. The developed low-cement periclase castables and products from them are recommended for service in the conditions, above all, the impact of basis slags. The manufacture of castables and products from them is mastered at the pilot production of JSC “URIR named after A. S. Berezhnoy”.

The conversion of high alumina cement

1975 ◽  
Vol 27 (91) ◽  
pp. 59-77 ◽  
Author(s):  
H. G. Midgley ◽  
Ann Midgley
Keyword(s):  
High Alumina ◽  
Alumina Cement ◽  
High Alumina Cement

Production of high-alumina cement clinker by fusion in an electric furnace

Refractories ◽  
1984 ◽  
Vol 25 (5-6) ◽  
pp. 293-296 ◽  
Author(s):  
I. N. Sorokin ◽  
T. M. Golovina ◽  
D. S. Rutman ◽  
A. D. Popov ◽  
V. M. Ust'yantsev ◽  
...  
Keyword(s):  
Electric Furnace ◽  
Cement Clinker ◽  
High Alumina ◽  
Alumina Cement ◽  
High Alumina Cement

Physical and chemical characteristics of heat resistant materials based on high alumina cement

2021 ◽  
Author(s):  
Dana Koňáková ◽  
Eva Vejmelková ◽  
Vojtěch Pommer ◽  
Martin Keppert ◽  
Anton Trník ◽  
...  
Keyword(s):  
High Alumina ◽  
Chemical Characteristics ◽  
Alumina Cement ◽  
High Alumina Cement ◽  
Physical And Chemical Characteristics ◽  
Heat Resistant ◽  
Physical And Chemical

Measurement of high-alumina cement-calcium carbonate reactions using DTA

Clay Minerals ◽  
1984 ◽  
Vol 19 (5) ◽  
pp. 857-864 ◽  
Author(s):  
H. G. Midgley
Keyword(s):  
Compressive Strength ◽  
Calcium Carbonate ◽  
High Alumina ◽  
Curing Time ◽  
Lower Strength ◽  
Alumina Cement ◽  
High Alumina Cement ◽  
Strength Tests ◽  
The Stability

AbstractHydrating high-alumina cement will react with calcium carbonate to form the complex mineral calcium carboaluminate hydrate, 3CaO.Al2O3.CaCO3.12H2O. This mineral is reported to be capable of providing strength in concrete and so may provide an alternative to the minerals normally found in the hydration of high-alumina cement, which may under certain conditions convert to other minerals with a loss in strength. Some doubt has been cast on the stability of calcium carboaluminate hydrate and it has been found that in hydrated high-alumina cement, calcium carboaluminate hydrate decomposes at temperatures in excess of 60°C. Cube compressive strength tests on high-alumina cement and high-alumina cement-calcium carbonate pastes have shown that the latter have a lower strength than pastes made with high-alumina cement alone. When cured at 50°C the high-alumina cement-calcium carbonate pastes show a loss in strength with curing time. Cements made with the high-alumina cement-calcium carbonate mixture always have a lower strength than those made with high-alumina cement alone and so no advantage is gained from their use.

Production of high-alumina cement by sintering

Refractories ◽  
1985 ◽  
Vol 26 (1-2) ◽  
pp. 92-93
Author(s):  
A. N. Sokolov ◽  
R. M. Shumeiko ◽  
L. M. Myznikova ◽  
P. D. Orekhov ◽  
L. A. Krasnitskaya
Keyword(s):  
High Alumina ◽  
Alumina Cement ◽  
High Alumina Cement
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