Alternative calcium-sulfate-bearing materials as cement ...

2004-11-01  A promising calcium-sulfate-bearing material (CSBM), which can replace mineral gypsum, seems to be desulfogypsum or FGD gypsum, an apparent waste material of the desulfurization process of residual gases with limestone in coal-burning power plants,,,,.

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Alternative calcium sulfate-bearing materials as cement ...

2004-11-01  Two calcium sulfate-bearing materials (CSBMs), gypsum (as reference material), and natural anhydrite were used as setting retarders. The chemical analysis of these materials, according to ASTM C 471M-95, the hydrated forms of calcium sulfate,

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Alternative Calcium Sulfate-Bearing Materials as Cement ...

Request PDF Alternative Calcium Sulfate-Bearing Materials as Cement Retarders The hydration process of cement pastes is of great importance to the physicomechanical properties of the hardened ...

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Alternative calcium-sulfate-bearing materials as cement ...

Made available by U.S. Department of Energy Office of Scientific and Technical Information ...

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ALTERNATIVE CALCIUM SULFATE-BEARING MATERIALS AS

ALTERNATIVE CALCIUM SULFATE-BEARING MATERIALS AS CEMENT RETARDERS. PART II. FGD GYPSUM . The rapid hardening of cement pastes due to the vivid reaction of C3A with water is usually prevented by adding a substance that acts as a retarder of the setting of cement. This article reports on a study of the displacement of natural gypsum (CaSO4-2H2O) in cement with an alternative

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ALTERNATIVE CALCIUM SULFATE-BEARING MATERIALS AS

This article reports on the use of alternative calcium sulfate-bearing materials, notably anhydrite, as cement retarders in cement pastes of CEM-I and CEM-II types. The aim of the study is to inquire the extent of natural gypsum replacement by natural anhydrite.

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Alternative Calcium-Sulfate-Bearing Materials as Cement ...

These calcium-sulfate-bearing materials (CSBM), alone or in mixtures, were ground with clinker both in laboratory and industrial scale to examine their influence on the physical and mechanical...

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Alternative calcium-sulfate-bearing materials as cement ...

The aim of this paper is to investigate the possible displacement of natural gypsum (CaSO 4 2H 2 O) in cement with an alternative setting retarder, such as the industrial by-product derived from flue gas desulfurization process called FGD gypsum. These calcium-sulfate-bearing materials (CSBM), alone or in mixtures, were ground with clinker both in laboratory and industrial scale to examine ...

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Alternative calcium sulfate-bearing materials as cement ...

Cement and Concrete Research Volume 34, Issue 11 , November 2004 , Pages 2113-2118 Alternative calcium sulfate-bearing materials as cement retarders : Part I. Anhydrite

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Alternative Calcium-Sulfate-Bearing Materials as Cement ...

Request PDF Alternative Calcium-Sulfate-Bearing Materials as Cement Retarders The aim of this paper is to investigate the possible displacement of natural gypsum (CaSO42H2O) in cement with ...

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Alternative calcium sulfate-bearing materials as cement ...

Abstract The hydration process of cement pastes is of great importance to the physicomechanical properties of the hardened material. Thus, substances that regulate the setting of cement, such as natural anhydrite, have attracted significant scientific interest during the past years. This paper briefly describes the results of utilization of natural anhydrite in cement pastes of CEM-I and CEM ...

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ALTERNATIVE CALCIUM SULFATE-BEARING MATERIALS AS CEMENT ...

The aim of this paper is to investigate the possible displacement of natural gypsum (CaSO42H2O) in cement with an alternative setting retarder, such as the industrial by-product derived from flue gas desulfurization process called FGD gypsum. These calcium-sulfate-bearing materials (CSBM), alone or in mixtures, were ground with clinker both in laboratory and industrial scale to examine their ...

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Alternative calcium-sulfate-bearing materials as cement ...

Made available by U.S. Department of Energy Office of Scientific and Technical Information ...

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Effects of alternative calcium sulphate-bearing materials ...

cement quality [1]. When Clinker C 3 A content increases, the used quantity of gypsum will increase accordingly but its upper limit will be the same as defined by cement standards, exceeding the permissible limit will lead to concrete expansion [2]. There are many theories explaining cement hydration steps and sulfate bearing materials role

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Alternative calcium-sulfate-bearing materials as cement ...

These calcium-sulfate-bearing materials (CSBM), alone or in mixtures, were ground with clinker both in laboratory and industrial scale to examine their influence on the physical and mechanical properties of cement, as well as on the industrial production line of cement. From the present work, it is extracted that the use of mixtures of sulfate-bearing materials with gypsum seems to be ...

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(PDF) Effects of alternative calcium sulphate-bearing ...

Effects of alternative calcium sulphate-bearing materials on cement characteristics in vertical mill and storing . June 2021; Case Studies in Construction Materials 14(11):e00489; DOI:10.1016/j ...

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alternative calcium sulfate bearing materials as cement

Alternative calcium sulfatebearing materials as . The hydration process of cement pastes is of great importance to the physicomechanical properties of the hardened material Thus, substances that regulate the setting of cement, such as natural anhydrite, have attracted significant scientific interest during the past years This paper briefly describes the results of utilization of natural ...

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Alternative calcium-sulfate-bearing materials as cement ...

Made available by U.S. Department of Energy Office of Scientific and Technical Information ...

Get Price

ALTERNATIVE CALCIUM SULFATE-BEARING MATERIALS AS CEMENT ...

The aim of this paper is to investigate the possible displacement of natural gypsum (CaSO42H2O) in cement with an alternative setting retarder, such as the industrial by-product derived from flue gas desulfurization process called FGD gypsum. These calcium-sulfate-bearing materials (CSBM), alone or in mixtures, were ground with clinker both in laboratory and industrial scale to examine their ...

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Effects of alternative calcium sulphate-bearing materials ...

cement quality [1]. When Clinker C 3 A content increases, the used quantity of gypsum will increase accordingly but its upper limit will be the same as defined by cement standards, exceeding the permissible limit will lead to concrete expansion [2]. There are many theories explaining cement hydration steps and sulfate bearing materials role

Get Price

Alternative calcium sulfate-bearing materials as cement ...

The hydration process of cement pastes is of great importance to the physicomechanical properties of the hardened material. Thus, substances that regulate the setting of cement, such as natural anhydrite, have attracted significant scientific interest during the past years. This paper briefly describes the results of utilization of natural anhydrite in cement pastes of CEM-I and CEM-II types.

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alternative calcium sulfate bearing materials as cement

Alternative calcium sulfatebearing materials as . The hydration process of cement pastes is of great importance to the physicomechanical properties of the hardened material Thus, substances that regulate the setting of cement, such as natural anhydrite, have attracted significant scientific interest during the past years This paper briefly describes the results of utilization of natural ...

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Case Studies in Construction Materials

of alternative calcium sulphate-bearing materials on cement characteristics in vertical mill and storing Sherif Hassana,b, Hamdy Salahc, Nabila Shehataa,* aEnvironmental Science and Industrial ...

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Effects of alternative calcium sulphate-bearing materials ...

Effects of alternative calcium sulphate-bearing materials on cement characteristics in vertical mill and storing Bibliographic Data ; References; This publication lists 38 references to other publication(s): Camarini, Gladis / De Milito, José Antonio (2011): Gypsum hemihydrate–cement blends to improve renderings durability. In: Construction and Building Materials, v. 25, n. 11 (November ...

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10.1016/j.cemconres.2004.03.020 10.1016/j ... - DeepDyve

2020-06-11  The addition of a sulfate-bearing material apart from the setting time also affects the strength growth of the hydrated cement paste and avoids shrinkage. However, if the addition of the abovementioned material exceeds a certain limit, it can lead to a substantial expansion of the concrete [1–3] . This is the main reason why the cement standards define an upper limit to the gypsum content ...

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Effects of alternative calcium sulphate-bearing materials ...

Effects of alternative calcium sulphate-bearing materials on cement characteristics in vertical mill and storing Bibliografische Daten; Verweise ; Diese Veröffentlichung enthält 38 Literaturhinweise zu anderen Veröffentlichungen: Camarini, Gladis / De Milito, José Antonio (2011): Gypsum hemihydrate–cement blends to improve renderings durability. In: Construction and Building Materials, v ...

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Calcium aluminate cements - Wikipedia

Alternative names are "aluminous cement", "high-alumina cement" and "Ciment fondu" in French. They are used in a number of small-scale, specialized applications. History. The method of making cement from limestone and low-silica bauxite was patented in France in 1908 by Bied of the Pavin de Lafarge Company. The initial development was as a result of the search for a cement offering sulfate ...

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