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Hydration and properties of sodium sulfate activated slag · Fichier PDF

Whilst sodium sulfate (Na2SO4) can be obtained from natural resources, the early strength of Na2SO4activated slag is usually low. In this paper, the effects of slag fineness and Na2SO4dosage on strength, pH, hydration and microstructure were investigated and compared with those of a pure Portland cement (PC).

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Sulfate Attack - Slag CementTraduire cette page

The use of slag cement reduces the likelihood of sulfate attack in three ways: Slag cement does not contain C 3 A, so its addition in concrete dilutes the total amount of C 3 A in the system. Slag cement reduces concrete permeability, making it harder for sulfates to penetrate into concrete.

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Supersulfated cement | cement | Britannica

In cement: Slag cements .of slag-containing cement is a supersulfated cement consisting of granulated slag mixed with 10 to 15 percent hard-burned gypsum or anhydrite (natural anhydrous calcium sulfate) and a few percent of portland cement. The strength properties of supersulfated cement are similar to those of portland cement, but it has an ...

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(PDF) Properties of blastfurnace cements (CEM .

Three blends of slag cement were prepared, namely 70/30, 50/50 and 30/70 mass% of Portland cement clinker and granulated slag, respectively. Each blend was mixed with 2.5, 5.0, 7.5 and 10.0 mass ...

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19 Types of cement – Properties and Uses in .

Sulphate Resisting Cement: Since ordinary Portland cement is susceptible to attack of sulfate, sulfate resisting Cement is developed to use where the soil is infected with sulfates. Due to the attack of sulphate in O.P.C. cement, there are chances of expansion within the framework of concrete and there are cracks and subsequent disruption.

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Supersulfated cement | cement | Britannica

Other articles where Supersulfated cement is discussed: cement: Slag cements: .of slag-containing cement is a supersulfated cement consisting of granulated slag mixed with 10 to 15 percent hard-burned gypsum or anhydrite (natural anhydrous calcium sulfate) and a few percent of portland cement. The strength properties of supersulfated cement are similar to those of portland cement.

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Activation of slag in blended cement | Cement Science

The hydration of slag and cement is more complex than that of Portland cement; given that both slag and cement take part in the reaction with water. ... There are two methods known to activate slag, viz. the addition of high amounts of calcium sulphate and alkali activation. The drawback of the former method requires long curing period and is ...

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US4328039A - High sulphate slag cement and .Traduire cette page

High sulphate slag cement and method for manufacturing this cement Download PDF Info Publication number US4328039A. US4328039A US06/138,220 US13822080A US4328039A US 4328039 A US4328039 A US 4328039A US 13822080 A US13822080 A US 13822080A US 4328039 A US4328039 A US 4328039A Authority US United States Prior art keywords slag cement sodium water caso Prior .

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SULPHATE RESISTING CEMENT · PDF file

Independent Cement's Sulphate resisting Cement, Type SR, complies with Australian Standard AS 3972, as Type GB and Type SR cement. Sulphate resistance can be achieved by blending Ground granulated blast furnace slag (GGBS) and/or Flyash with GP Cement. Proportion of GGBS and/or FLyash can be altered to increase the durability de-

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Sulfate Attack - an overview | ScienceDirect TopicsTraduire cette page

The internal sulfate attack is characterized by a delayed mobilization of cement sulfates, and it leads to the generalized deterioration of the concrete. The main cause is a high elevation of the temperature, which can be encountered in the case of massive structures (see Section 3.2.2) or during precasting while using steam curing.

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Slag hydration and chloride binding in slag cements ...Traduire cette page

20/01/2019 · It is presumed that the changes in phase assemblage due to the interactions between the cement paste and the sulphate ions in solution (see below) brings about changes in chloride binding reflected in the diminished quality of fit for the two isotherms described above. 3.1.1. Influence of slag load, slag composition and external sulphate

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Slag Cement Granulated Blast Furnace Slag

Slag Cement Granulated Blast Furnace Slag 11 Benefits of the Concretes Produced with Blast Furnace Slag Cement Hydration The reaction between blast furnace slag cement and water is a complicated process. This involves the activation of the slag with alkalis and sulphates in order to form its hydration product. Some of these are

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US4328039A - High sulphate slag cement and .Traduire cette page

High sulphate slag cement and method for manufacturing this cement Download PDF Info Publication number US4328039A. US4328039A US06/138,220 US13822080A US4328039A US 4328039 A US4328039 A US 4328039A US 13822080 A US13822080 A US 13822080A US 4328039 A US4328039 A US 4328039A Authority US United States Prior art keywords slag cement .

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CA1131664A - High sulphate slag cement and .

ABSTRACT OF THE DISCLOSURE A high sulphate slag cement having a Blaine specific surface ratio of 4500 - 5500 cm2/g, consists of water-granulated blast furnace slag (in a quantity 80 - 85%) and which contains the following ingredients in the amounts indicated; CaO (40 - 50%) Al2O3 (14 - 20%) SiO2 (30 - 35%) MgO (5 -8%) The high sulphate slag cement also .

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Engineering Seminars: SLAG CEMENT

Slag cement should be substituted for Portland cement on a one-to-one basis by mass. Specific gravity of slag cement ranges from 2.85 to2.94, depending upon the slag cement source-as compared to 3.15for Portland cement. The difference in specific gravity means a greater volume of slag cement will be used to replace the same mass of Portland cement.

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Slag Cement AssociationTraduire cette page

Slag cement helps reduce permeability, sulfate attack, and alkali-silica reaction creating a longer lasting and more resilient concrete.

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Hydration and properties of sodium sulfate activated slag · Fichier PDF

Whilst sodium sulfate (Na2SO4) can be obtained from natural resources, the early strength of Na2SO4activated slag is usually low. In this paper, the effects of slag fineness and Na2SO4dosage on strength, pH, hydration and microstructure were investigated and compared with those of .

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All Products Archives - Independent Cement

Sulphate Resistant Cement Sulphate Resistant cement (SR) is a blended cement specifically designed to aid in resisting sulphate and chloride attack in concrete. This resistance improves the durability of the concrete, particularly in marine environments. ... The Roadmaker series of products are a special formulation of cement, slag and lime ...

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What is the difference between opc cement and .Traduire cette page

PORTLAND SLAG CEMENT: Manufactured by mixing portland clinker with blast furnace slag about 65% of mass of mixture. It has low heat of hydration, more durability and is better resistant to soil and water containing excessive amounts of sulphates, alkalies,metals as well as acid

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Portland Slag Cement (Special Hi-Bond .

Special hi-bond cement has ggbfs (graund granulated blast furness slag) upto 40% of the cement, this slag has got more than 90% fine and uniform size of glass contains which gives protection to the structure from adverse impact of sulphate, chlorides and acid, in state of gujarat there are no of projects which use only slag cement, the special application of this product is .

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