New periclase-spinel refractories from densely sintered
Apr 19 2013 · Six specimens of magnesia-spinel material are made under laboratory conditions. Specimens are prepared at 1600°C from sintered magnesite and three different compositions based on spinel previously synthesized at 1760 °C. Sintered magnesite and synthesized spinel properties are provided. Raw material properties in relation to different spinel content within them apparent density
Get Price
Degradation of MgO–C refractories corroded by SiO2–Fe2O3
Nov 01 2015 · The corrosion mechanism of such slag to refractories is also seldom. The suitable material selection is still controversial and need further study. In the present paper properties of new type MgO–C brick are developed and the degradation of the as-prepared MgO–C bricks to SiO 2 –Fe 2 O 3 –V 2 O 5 –TiO 2 –MnO–MgO–Cr 2 O 3 slag
Get Price
New periclase-magnesium aluminate spinel refractories from
New periclase-magnesium aluminate spinel refractories from sintered high purity dead burned magnesite and new various presynthesized spinel-based compositions (I) Study in terms of mineralogical
Get Price
Minerals Free Full-Text Effect of the Cooling Regime
This study investigated the influence of different cooling regimes on the microstructure and consequent reactivity of belite-sulfoaluminate clinkers. The cement clinkers were synthesized by incorporating secondary raw materials such as titanogypsum and bottom ash to the natural raw materials. Clinker phases were determined by Rietveld quantitative phase analysis while the distribution
Get Price
Quantitative Study of Hydration of PPC-FA Based using
for 10 minutes to remove any absorbed moisture. The cement is then enclosed and sent to the laboratory for XRD testing. 3 samples of the cement were analysed. ASTM C 8 was also referred. For the hardened cement slurries the cement
Get Price
1. Introduction
The XRD (Smart Lab Rigaku Tokyo Japan) internal standard method 27 was employed to determine the content of periclase in LHC clinkers and the hydrated paste samples.The internal standard substance and target component were ZnO (AR 2 θ = 36.50°) and periclase (2 θ = 42.90°). The pure phase periclase crystal was obtained by calcining magnesium carbonate basic at 1000°C for 1.0 hour.
Get Price
Vol. 3 Issue 4 April 2014 Utilization Of Steel Slag In
The highest and lowest compressive strength was obtained in the concrete specimens prepared with steel slag and calcareous limestone aggregates respectively. Potable tap water available in the laboratory with pH value of 7.0±1 and confirming to the requirements of IS The experimental program was designed to study the
Get Price
Year 2011 Volume 31Techna Group
The main target of this work is to prepare refractory magnesia- and aluminabased ceramics within the MgO-Al 2 O 3-ZrO 2-SiO 2 system. These include periclase (MgO) and its composites with MgAl 2 O 4-spinel and forsterite (MgSiO 4)-zirconia (ZrO 2) as well as corundum (α-Al 2 O 3) and its composite with mullite (Al 6 Si 2 O1 3)- zirconia (ZrO 2
Get Price
Hydration of High Belite CementDPI Proceedings
The new cement HBC is believed to be a low-carbon and low-energy type of cement with significant potential in reducing gas emission and energy consumption. The main purpose of this paper is to study the hydration mechanism and hydration product of the new HBC cement. were prepared and tested according to National China standard GB/T 50081-
Get Price
Experimental Investigation for the Development and
Samples were prepared by firstly crushing the stone with a hammer and then the fragments obtained were finely powdered using a ceramic mortar and pestle. The resulting powder was sieved and particles between 60 and 125μm were used for the analyses. In order to study the decomposition process of dolomite samples were decomposed at 778 and
Get Price
Thermodynamic simulation in evaluating the role of minor
Sep 26 2020 · The present investigation reveals the importance of the minor oxides and mineralizers on the formation of the critically important cement phases (i.e. C 3 S C 2 S C 3 A and C 4 AF) which demonstrate their fundamental role in the development of critical properties of cement. Thermodynamic investigation using CALculation of PHAse Diagram (CALPHAD) method was carried out to understand
Get Price
Sustainability Free Full-Text Performance-Based
A circular approach to managing resources that will promote their reuse and recycling is nowadays of crucial importance for a sustainable society. In this regard the substitution of natural aggregates by steel slag in construction materials represents a promising option. In this paper the use of Ladle Furnace Slag (LFS) as sustainable filler and fine aggregate for asphalt mixtures is studied.
Get Price
Dr D MahapatraJabodetabek Indonesia Profil
To prepare long term project action programme or operational plan for MEC PLANT (Laboratory) 3.1 Training of new chemists 3.2 Commissioning and Calibration of the lab equipment 3.3 Quality Control 3.4 Process parameter evaluation standardization Estimation of periclase crystal size. Comparative study of different methods. 8
Get Price
Process and quality optimization in cement plant.
Jul 31 2020 · Autoclave expansion is another property of cement that partly depends on the grinding process. More often it is experienced that cement ground in the laboratory mill shows higher autoclave expansion than the cement produced in the plant mill even when both of them are having equal amount of gypsum and ground to the same specific surface area.
Get Price
Study of hydration processes of Portland cements
The goal of this study was to increase early strength properties of Portland cement/fly ash blends by increasing the early ettringite formation in order to decrease the porosity. Therefore various amounts of anhydrite and laboratory synthesised C3A were added to Portland cement/fly ash systems that contained 30 fly ash.
Get Price
Degradation of MgO–C refractories corroded by SiO2–Fe2O3
Nov 01 2015 · The corrosion mechanism of such slag to refractories is also seldom. The suitable material selection is still controversial and need further study. In the present paper properties of new type MgO–C brick are developed and the degradation of the as-prepared MgO–C bricks to SiO 2 –Fe 2 O 3 –V 2 O 5 –TiO 2 –MnO–MgO–Cr 2 O 3 slag
Get Price
New periclase-spinel refractories from densely sintered
Apr 19 2013 · Six specimens of magnesia-spinel material are made under laboratory conditions. Specimens are prepared at 1600°C from sintered magnesite and three different compositions based on spinel previously synthesized at 1760 °C. Sintered magnesite and synthesized spinel properties are provided. Raw material properties in relation to different spinel content within them apparent density
Get Price
Degradation of MgO–C refractories corroded by SiO2–Fe2O3
Nov 01 2015 · The corrosion mechanism of such slag to refractories is also seldom. The suitable material selection is still controversial and need further study. In the present paper properties of new type MgO–C brick are developed and the degradation of the as-prepared MgO–C bricks to SiO 2 –Fe 2 O 3 –V 2 O 5 –TiO 2 –MnO–MgO–Cr 2 O 3 slag
Get Price
Hydration of High Belite CementDPI Proceedings
The new cement HBC is believed to be a low-carbon and low-energy type of cement with significant potential in reducing gas emission and energy consumption. The main purpose of this paper is to study the hydration mechanism and hydration product of the new HBC cement. were prepared and tested according to National China standard GB/T 50081-
Get PriceMaterials Free Full-Text Impact of Bio-Carrier
The present study evaluated the self-healing efficiency and mechanical properties of mortar specimens incorporating a bio-carrier as a self-healing agent. The bio-carrier was produced by immobilizing ureolytic bacteria isolated from seawater in bottom ash followed by surface coating with cement powder to prevent loss of nutrients during the mixing process.
Get Price
Sorel cementWikipedia
Sorel cement (also known as magnesia cement or magnesium oxychloride) is a non-hydraulic cement first produced by the French chemist Stanislas Sorel in 1867.. In fact in 1855 before working with magnesium compounds Stanislas Sorel first developed a two-component cement by mixing zinc oxide powder with a solution of zinc chloride. In a few minutes he obtained a dense material harder than
Get Price
MgO expansive cement and concrete in China Past present
Mar 01 2014 · In addition to the hydration reactivity the location of periclase formed in cement clinker also plays a role in its slow hydration. As shown in Fig. 1(a) the periclase typically formed in the cement clinker is surrounded by other mineral phases of C 3 S C 2 S and C 3 A which provide a barrier for the water diffusion to the MgO surface and normally the surrounding clinker mineral hydrates
Get Price
1. Introduction
The XRD (Smart Lab Rigaku Tokyo Japan) internal standard method 27 was employed to determine the content of periclase in LHC clinkers and the hydrated paste samples.The internal standard substance and target component were ZnO (AR 2 θ = 36.50°) and periclase (2 θ = 42.90°). The pure phase periclase crystal was obtained by calcining magnesium carbonate basic at 1000°C for 1.0 hour.
Get Price
Sorel cementWikipedia
Sorel cement (also known as magnesia cement or magnesium oxychloride) is a non-hydraulic cement first produced by the French chemist Stanislas Sorel in 1867.. In fact in 1855 before working with magnesium compounds Stanislas Sorel first developed a two-component cement by mixing zinc oxide powder with a solution of zinc chloride. In a few minutes he obtained a dense material harder than
Get PricebMaterials Journal of Sustainable Cement-Based
(3) propose a new method for determining the water absorption coefficient of the finer fraction of FRCA. This study is based on laboratory-made FRCA produced from three concretes that have been prepared in the laboratory with two water–cement ratios (W/C) and two paste volumes. As a consequence the original concrete com-
Get PriceA New Technique to Quantitatively Determine the Periclase
Jul 24 2020 · In this study a new technique to quantitatively determine the content of periclase in HMPC was demonstrated by combining an autoclave test a thermogravimetric analysis (TGA) and a chemical analysis this was achieved by using the periclase standard substance (PSS) as the internal standard.
Get PriceStudy of hydration processes of Portland cements
The goal of this study was to increase early strength properties of Portland cement/fly ash blends by increasing the early ettringite formation in order to decrease the porosity. Therefore various amounts of anhydrite and laboratory synthesised C3A were added to Portland cement/fly ash systems that contained 30 fly ash.
Get Price
STOCHASTIC MODELING OF COMPRESSIVE STRENGTH OF
Portland cement and the activator for the prediction of compressive strength of PHSCs. EXPERIMENTAL Materials PHS used in this study was prepared from a phos-phoric acid plant production located in southeast of Tehran Iran. The X-ray diffractogram of the PHS is depicted in Figure 1. The peaks of periclase (MgO)
Get Price
Thermodynamic simulation in evaluating the role of minor
Sep 26 2020 · The present investigation reveals the importance of the minor oxides and mineralizers on the formation of the critically important cement phases (i.e. C 3 S C 2 S C 3 A and C 4 AF) which demonstrate their fundamental role in the development of critical properties of cement. Thermodynamic investigation using CALculation of PHAse Diagram (CALPHAD) method was carried out to understand
Get Price
