slag cement index

  • Effects of Ground Granulated Blast Furnace Slag in ...

    Slag cement is often referred to as "ground granulated blast-furnace slag" (GGBFS). As requested in 2001 by slag cement manufacturers and the Slag Cement Association, the American Concrete Institute officially reviewed and changed the terminology from GGBFS to slag cement .

  • TB-0102 — Ground Granulated Blast- Furnace Slag: Its ...

    Type I Portland cement, a typical Class C fly ash and a typical Class F fly ash. You will note that the GGBFS and the two fly ashes have the same kinds of oxides as the cement, which means that when GGBFS or fly ash is added to concrete, materials similar to Portland cement are being introduced into the system. Table 2: Slag Activity Index ...

  • GROUND GRANULATED BLAST FURNACE SLAG

    Ground granulated blast furnace slag (GGBFS) is designated in ASTM C 989 and consists mainly of silicates and aluminosilicates of calcium. GGBFS is divided into three classifications based on its activity index. Grade 80 has a low activity index and is used primarily in mass structures because it generates less heat than portland cement.

  • PCA - The Portland Cement Association - America's Cement ...

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  • ASTM-C989 | Standard Specification for Slag Cement for Use ...

    ASTM-C989 Standard Specification for Slag Cement for Use in Concrete and Mortars - blast-furnace slag; granulated blast furnace slag; slag activity index; slag cement;; ICS Number Code 91.100.30 (Concrete and concrete products)

  • Best Practices for Concrete Pavements / Supplementary ...

    Slag cement, previously known as ground-granulated blast-furnace slag (GGBFS), has been used in concrete for well over 100 years (ACI 2011). The first recorded production in the US of blended cement containing both slag and portland cement was in 1896 (ACI 2011).

  • Chemical Admixtures and Slag | GCP Applied Technologies ...

    Just like Portland cement, GGBFS must be finely ground before it can be used in concrete. If the GGBFS is ground by itself, it can be blended mechanically with cement at the cement mill to make ASTM C595, Type IS, Portland blast-furnace slag cement, or it can be added at the concrete plant to make slag concrete.

  • Evaluation of Strengths from Cement Hydration and Slag ...

    3.1. Slag Activity Index. According to ASTM C989, GGBF slag has 3 grades that depend on the mortar strength, i.e., grade 80, 100, and 120. The slag activity index (SAI) of mortar using GGBF slag to replace PC at a rate of 50% by weight of the binder will not be less than 75% of the strength of the PC mortar at 28 days for grade 80.

  • Evaluation of Slag Reaction Efficiency in Slag-Cement ...

    For high volume slag concrete, when the replacement ratio exceeds a certain 'threshold' value, the superfluous and ineffective slag will no longer react in concrete but simply behave as a fine aggregate, which may cause the decrement of strength. The 'threshold' value depends on the reaction efficiency of slag.

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  • Evaluation of Ground Granulated Iron Blast-Furnace Slag ...

    SAI = slag-activity index, % SP = average compressive strength of slag-reference cement mortar cubes, psi P = average compressive strength of reference cement mortar cubes, psi Grades are determined when the mortar cube sample's SAI falls within the allowed ranges of the following table. Slag Activity Index Min., percent Average of Last 5

  • Standard Specification for Slag Cement for Use in .

    Standard Specification for Slag Cement for Use in Concrete and Mortars1 This standard is issued under the fixed designation C989/C989M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.

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  • Factors affecting the reactivity of slag | Cement Science

    The exact composition of slag varies over a range. In general, factors that determine the suitability of slag for usage in composite cement mainly include the fineness of grinding, glass content and the chemical composition. Fineness; Like most of other cement materials, the reactivity of slag is influenced by its surface area.

  • Supplementary Cementing Materials

    Slag Cement, formerly referred to as ground, granulated blast-furnace slag, is a glassy, granular material formed when molten, iron blast-furnace slag is rapidly chilled - typically by water sprays or immersion in water - and subsequently ground to cement fineness. Slag cement is hydraulic and can be added to cement as an SCM.

  • Factors affecting the reactivity of slag | Cement Science

    The exact composition of slag varies over a range. In general, factors that determine the suitability of slag for usage in composite cement mainly include the fineness of grinding, glass content and the chemical composition. Fineness; Like most of other cement materials, the reactivity of slag is influenced by its surface area.

  • Activity index for steel slag | Magazine of Concrete Research

    Currently, most steel slag is used as aggregate for concrete, asphaltic paving and road bases. High-alkalinity steel slag shows certain cementitious properties and should be given priority to be used as a supplementary cementitious material in concrete, based on economical and environmental considerations. This study was conducted to propose an effective method to evaluate the activity of .

  • Cement, Concrete, and Aggregates Index to Volume 12 1990

    Cement, Concrete, and Aggregates Index to Volume 12 1990 Number Issue Pages 1 Summer 3-60 2 Winter 61-128 A Abrasion loss: Laboratory Evaluation of Wet and Dry Abrasion Resistance of Cement Mortar (Fwa and Low), Winter, 101 Abrasion resistance Laboratory Evaluation of Wet and Dry Abrasion Resistance of Cement Mortar