calcium sulfoaluminate cement pastes from industrial

Calcium sulfoaluminate cement pastes from industrial ...

Oct 24, 2016  10%  In this work, the effects of the variation of hemihydrate and the water/cement ratio were evaluated on the compressive strength and reaction mechanisms in pastes of calcium sulfoaluminate cement (CSA cement) prepared from industrial wastes as fluorgypsum, aluminum dross and fly ash. Based on stoichiometric calculations and the chemical compositions of

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Laboratory production of calcium sulfoaluminate cements ...

Feb 01, 2020  The mineralogy and hydration of calcium sulfoaluminate clinkers and cements produced using natural materials and abundant industrial wastes were investigated. The following can be concluded: Waste-containing CS̄A clinkers with satisfactory mechanical properties can be produced at 1250 °C, about 200 °C lower than required for Portland cement.

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Laboratory production of calcium sulfoaluminate cements ...

A drawback of conventional calcium sulfoaluminate (CS̄A) cement production is the use of the costly raw material bauxite as a source of alumina to form the main clinker phase ye'elimite. Replacement of bauxite with industrial wastes can benefit CS̄A cements economically and environmentally.

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Synthesizing of calcium sulfoaluminate-belite (CSAB ...

Jan 01, 2018  Concr. Compos. 34 (2012) 893-902. [8] C. Hu, Micro-mechanical properties of calcium sulfoaluminate cement and the relation with microstructure, Cem. Concr. Compos. 80 (2017) 10-16. [9] M.L. Pace, Use of industrial byproducts as alumina sources for synthesis of calcium sulfoaluminate cements, Environ. Sci. Technol. 45 (2011) 6124–6128. [10]

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Synthesis of low-temperature calcium sulfoaluminate-belite ...

Oct 01, 2017  1. Introduction. Nowadays, the reductions of greenhouse gas emissions and energy preservation have become a focus for the environmental protection of the world , , .Calcium sulfoaluminate-belite (CŜAB) cements have been promoted as an alternative binder to Portland cement because of much less CO 2 emission. Compared to the alite (C 3 S) phase release of 578 kg

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CALCIUM SULFOALUMINATE CEMENT (CSA CEMENT)

Royal White Cement, INC 8316 East Freeway. Houston, TX 77029 Tel: 1-866-W-CEMENT. CALCIUM SULFOALUMINATE CEMENT (CSA CEMENT) SAFETY DATA SHEET

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Calcium Sulfoaluminate, Geopolymeric, and Cementitious ...

Sep 16, 2017  Calcium sulfoaluminate (CSA) cements are special cements, namely hydraulic binders obtained from non-Portland clinkers. They are characterized by a high mechanical strength at early ages, rapid-hardening, high impermeability, and chemical resistance, as well as low drying shrinkage and solution alkalinity [20–22].

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Hydrothermal synthesis of calcium sulfoaluminate–belite ...

Mar 01, 2016  Calcium sulfoaluminate–belite (CŜAB) cement, a type of special cements containing dicalcium silicate (2CaOSiO 2; C 2 S), calcium sulfoaluminate (4CaO3Al 2 O 3 SO 3; C 4 A 3 Ŝ), tetracalcium aluminoferrite (4CaOAl 2 O 3 Fe 2 O 3; C 4 AF) and calcium sulfate (CaOSO 3; CŜ) were, therefore, developed (Arjunan et al., 1999 ...

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View of Synthesis and mechanical properties of a calcium ...

The cement pastes were prepared by mixing the cements with water using water to cement ratio (w/c) of 0.4. Samples were cast in nylamid molds and cured at 20 and 40 °C for up to 28 days. A Portland cement paste was also prepared as reference and cured

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Mechanical and chemical behavior of calcium sulfoaluminate ...

A calcium sulfoaluminate clinker was synthesized calcining a mixture of fly ash, fluorogypsum, aluminum slag, and calcium carbonate at 1250 ºC. The clinker was mixed with 15, 20, or 25% e.p. of CaSO4½H 2 O. The pastes were prepared with a water/cement ratio of 0.5. Compression resistance of cements cured in

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Mechanical and chemical behavior of calcium

A calcium sulfoaluminate clinker was synthesized calcining a mixture of fly ash, fluorogypsum, aluminum slag, and calcium carbonate at 1250 ºC. The clinker was mixed with 15, 20, or 25% e.p. of CaSO4½H 2 O. The pastes were prepared with a water/cement ratio of 0.5. Compression resistance of cements cured in

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Calcium Sulfoaluminate Eco-Cement from Industrial Waste ...

In this paper, the potential benefits offered by calcium sulfoaluminate cement (CSA) production from industrial wastes or by-products already present in Republic of Croatia have been addressed. A variety of industrial wastes, namely phosphogypsum (PG), coal bottom ash (BA) and electric arc furnace slag (EAFS) were used as raw materials to provide additional environmental advantages in ...

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Laboratory production of calcium sulfoaluminate cements ...

Abstract A drawback of conventional calcium sulfoaluminate (CSA) cement production is the use of the costly raw material bauxite as a source of alumina to form the main clinker phase ye'elimite. Replacement of bauxite with industrial wastes can benefit CSA cements economically and environmentally. This study demonstrates the use of high amounts of red mud, a sulfate-rich/high-lime fly ash, and ...

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Low Temperature Cement Synthesis: Calcium

Calcium sulfoaluminate-belite (CŜAB) cement is al-ternative cement for a replacement of ordinary Portland cement (OPC) [1] because of the benefits in reductions of CO 2 emissions and firing temperatures [2][3]. In addition its grindability was improved [4]. Furthermore, CŜAB cement concrete has presented good dimensional stability,

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Effect of citric acid on calcium sulfoaluminate cements ...

Feb 12, 2020  A study of the effects of citric acid on the mechanical properties of calcium sulfoaluminate (C 4 A 3 S̄) cements in hydraulic pastes and mortars was performed. Clinker made up of C 4 A 3 S̄ was obtained from the calcination of a mixture of fly ash, aluminium dross and fluorogypsum at 1100°C. The C 4 A 3 S̄ cement was prepared by mixing the clinker with certain percentages of

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INTERNATIONAL WORKSHOP ON Calcium sulfoaluminate

International Workshop on Calcium Sulfoaluminate Cements 2018 4 PREFACE Calcium sulfoaluminate cements are receiving increasing interest as an environmentally friendly alternative to Portland cement and as they can be used to formulate mortars and concretes with special properties such as fast setting, high early strength or shrinkage-compensation.

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Mechanical performance of rubberized cement paste with ...

Due to mismatch in free surface energy between rubber and cement paste, an interfacial gap is often reported to be present. This investigation aims to determine the effect of expansive cement, specifically calcium sulfoaluminate cement (CSA), has on the performance on rubberized cement samples, and its effect on the interfacial transition zone.

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Hydrothermal synthesis of calcium sulfoaluminate–belite ...

Non-alkaline Calcium sulfoaluminate-belite cement comprehensive strength of synthesized cements increased per day as ages of 1, 7, 28 and 90 days were 12.9, 21.1, 30.5 and 41.1MPa respectively. Hydration product in a form of ettringite was mainly responsible for

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Utilization of Several Industrial Wastes as Raw Material ...

The aim of this research was to study the production of calcium sulfoaluminate (CSA) cement from several industrial waste materials including with marble dust waste, flue gas desulfurization gypsum, ceramics dust waste, and napier grass ash. The chemical composition, microstructure, and phase composition of raw materials were examined using energy dispersive X-ray fluorescence (EDXRF ...

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Utilization of Several Industrial Wastes as Raw Material ...

The utilization of by-products or industrial wastes as additions to Ordinary Portland Cement (OPC) is a well-known technique to reduce the CO 2 emissions associated with the energy-intensive manufacture of cement [].An alternative way to reduce the embodied CO 2 (eCO 2) from OPC production is the use of a non-PC based system as a binding ingredient.. Calcium sulfoaluminate cement (CSA cement ...

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Immobilization of heavy metals by calcium sulfoaluminate ...

Dec 15, 2005  Six calcium sulfoaluminate-based cementitious systems composed of calcium sulfoaluminate, calcite, vaterite, and gypsum were cured as pastes and mortars for 1, 7, 28 and 84 days. Pastes were analyzed with X-ray diffraction, thermogravimetric and differential thermal analyses.

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The formation process of aluminum hydroxide in calcium ...

Sep 17, 2020  Calcium sulfoaluminate (C 4 A 3 Š), also known as Klein component or ye’elimite, is the main mineralogical phase of a promising low-CO 2 alternative to ordinary Portland cement (OPC) and C 4 A 3 Š-containing cements have received significant attention for their excellent performance (Li et al. 2020; Shen et al. 2018; Šiler et al. 2014; Staněk and Sulovský 2015).

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Hydration of a Belite-CalciumSulfoaluminate-Ferrite cement ...

Hydration of a Belite-Calcium Sulfoaluminate-Ferrite cement : AetherTM Morin V1*., Walenta G.2* Gartner E., Termkhajornkit P., Baco I., Casabonne J.M. LAFARGE Research Centre, 95 Rue du Montmurier, 38291 Saint-Quentin-Fallavier, FRANCE Abstract We used multiple techniques to study the paste hydration, and w/c = 0.50, of a Belite-Calcium Sulfo-Aluminate-Ferrite (AETHERTM) cement

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Influence of water removal techniques on the composition ...

Jul 10, 2020  Influence of different drying techniques, namely, vacuum drying, oven drying (40 °C) and D-drying on the composition and microstructure of the calcium sulfoaluminate (CSA) cement was investigated in this study. The vacuum drying and oven drying were performed after the samples were immersed in acetone or ethanol. The results show that D-drying decomposes ettringite (AFt) greatly.

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Mechanical and chemical behavior of calcium

A calcium sulfoaluminate clinker was synthesized calcining a mixture of fly ash, fluorogypsum, aluminum slag, and calcium carbonate at 1250 ºC. The clinker was mixed with 15, 20, or 25% e.p. of CaSO4½H 2 O. The pastes were prepared with a water/cement ratio of 0.5. Compression resistance of cements cured in

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Immobilization of heavy metals by calcium sulfoaluminate ...

Dec 15, 2005  Six calcium sulfoaluminate-based cementitious systems composed of calcium sulfoaluminate, calcite, vaterite, and gypsum were cured as pastes and mortars for 1, 7, 28 and 84 days. Pastes were analyzed with X-ray diffraction, thermogravimetric and differential thermal analyses.

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Low Temperature Cement Synthesis: Calcium

Calcium sulfoaluminate-belite (CŜAB) cement is al-ternative cement for a replacement of ordinary Portland cement (OPC) [1] because of the benefits in reductions of CO 2 emissions and firing temperatures [2][3]. In addition its grindability was improved [4]. Furthermore, CŜAB cement concrete has presented good dimensional stability,

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Continuous monitoring for leaching of calcium ...

Ionic zinc is considered as an environmental pollutant. This work systematically investigated leaching mechanisms of calcium sulfoaluminate cement (CSA) pastes incorporated with/without ZnCl 2 under the attacks of chloride and/or sulfate. The leaching behaviors of CSA pastes in the leaching solution are in-situ and continuously monitored by innovative non-contact electrical impedance ...

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Low-CO2 Cements based on Calcium Sulfoaluminate

– Calcium aluminate cements (based principally on CA) – Calcium sulfoaluminate cements (based principally on C. 4 . A. 3 $) – Various combinations of the above systems • Non limestone-based cements: – Alkali activated pozzolans (e.g. “Geopolymers”) – Calcium sulfate cements (“plasters”, etc.) – Mg-based cements

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Mechanical performance of rubberized cement paste with ...

Due to mismatch in free surface energy between rubber and cement paste, an interfacial gap is often reported to be present. This investigation aims to determine the effect of expansive cement, specifically calcium sulfoaluminate cement (CSA), has on the performance on rubberized cement samples, and its effect on the interfacial transition zone.

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[PDF] Utilization of Several Industrial Wastes as Raw ...

The aim of this research was to study the production of calcium sulfoaluminate (CSA) cement from several industrial waste materials including with marble dust waste, flue gas desulfurization gypsum, ceramics dust waste, and napier grass ash. The chemical composition, microstructure, and phase composition of raw materials were examined using energy dispersive X-ray fluorescence (EDXRF ...

get price

INTERNATIONAL WORKSHOP ON Calcium sulfoaluminate

International Workshop on Calcium Sulfoaluminate Cements 2018 4 PREFACE Calcium sulfoaluminate cements are receiving increasing interest as an environmentally friendly alternative to Portland cement and as they can be used to formulate mortars and concretes with special properties such as fast setting, high early strength or shrinkage-compensation.

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Porosimetric features of calcium sulfoaluminate and ...

Both calcium sulfoaluminate and portland cement pastes were tested with a water-to-cement ratio of 0.4, 0.5, and 0.6 using the two test methods. Since the measurement range of pore diameter by the nitrogen sorption porosimetry is relatively narrow (about 0.3–300 nm), the microporous properties of cement paste can be well determined.

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Evaluation of Calcium Oxide Nanoparticles from Industrial ...

The cement pastes containing carbonated mud up to 25% (20.4%) exhibited higher water absorption values at all of the curing times than the pure OPC paste. The porosity of the hardened cement paste shows that the total porosity decreased for the blended pastes, indicating that CMW-blended paste possesses a denser microstructure [ 51 ].

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STABILIZATION OF ZnCl2-CONTAINING WASTE USING

Shorthand cement notations: C = CaO, A = Al2O3, S = SiO2, S = SO3, T = TiO2, H = H2O Both cement pastes and mortars were made with the same w/c ratio of 0.55. A blend of two siliceous sands (0.1−1.2 mm) with a sand to cement weight ratio of 3 was used to optimize the workability and limit the heat release of fresh mortars during hydration.

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Effect of citric acid on calcium sulfoaluminate cements ...

Feb 12, 2020  A study of the effects of citric acid on the mechanical properties of calcium sulfoaluminate (C 4 A 3 S̄) cements in hydraulic pastes and mortars was performed. Clinker made up of C 4 A 3 S̄ was obtained from the calcination of a mixture of fly ash, aluminium dross and fluorogypsum at 1100°C. The C 4 A 3 S̄ cement was prepared by mixing the clinker with certain percentages of

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Hydraulic behavior of calcium sulfoaluminate-based cements ...

Sep 01, 1993  OSTI.GOV Journal Article: Hydraulic behavior of calcium sulfoaluminate-based cements derived from industrial process wastes

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Hydration of Calcium Sulfoaluminate-Based Binder ...

The production of Portland cement clinker results in considerable CO2 emission, and the Portland cement industry is therefore actively looking for ways to reduce greenhouse gas emissions [1]. Calcium sulfoaluminate is finely ground calcium sulfoaluminate clinker, which is manufactured at about 100–200 C lower than Portland cement clinker [1 ...

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