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Thread: What is GGBS?And the usefulness of GGBS!

  1. #1
    Join Date
    Jul 15
    Posts
    25

    What is GGBS?And the usefulness of GGBS!

    Ground granulated blastfurnace slag (GGBS) is a by-product from the blast-furnaces used to make iron. These operate at a temperature of about 1,500 degrees centigrade and are fed with a carefully controlled mixture of iron-ore, coke and limestone. The iron ore is reduced to iron and the remaining materials form a slag that floats on top of the iron. This slag is periodically tapped off as a molten liquid and if it is to be used for the manufacture of GGBS it has to be rapidly quenched in large volumes of water. The quenching, optimises the cementitious properties and produces granules similar to a coarse sand. This 'granulated' slag is then dried and ground to a fine powder.

      Although normally designated as "GGBS" in the China, it can also be referred to as "GGBFS" or "slag cement"
    Through the use of vertical grinding mill for grinding slag, waste slag grinding into slag powder.

      The major use of GGBS is in ready-mixed concrete, and it is utilised in a third of all China ‘ready-mix’ deliveries. Specifiers are well aware of the technical benefits, which GGBS imparts to concrete, including:

      •better workability, making placing and compaction easier

      •lower early-age temperature rise, reducing the risk of thermal cracking in large pours

      •elimination of the risk of damaging internal reactions such as ASR

      •high resistance to chloride ingress, reducing the risk of reinforcement corrosion

      •high resistance to attack by sulphate and other chemicals

      •considerable sustainability benefits
    In the production of ready-mixed concrete, GGBS replaces a substantial portion of the normal Portland cement content, generally about 50%, but sometimes up to 70%. The higher the proportion, the better is the durability. The disadvantage of the higher replacement level is that early-age strength development is somewhat slower.

      GGBS is also used in other forms of concrete, including site-batched and precast. Unfortunately, it is not available for smaller-scale concrete production because it can only be economically supplied in bulk. GGBS is not only used in concrete and other applications include the in-situ stabilisation of soil.
    You may have a look at this site:http://www.great-wall.co/

  2. #2
    Join Date
    Jun 11
    Posts
    4

    GGBS Storage

    GGBS is quite useful in concrete manufacturing especially in saline conditions of the soil where the Sulphate Resistant qualities of the concrete are improved by using GGBS. This substantially increases the working life of concrete in challenging circumstances. Storage of GGBS needs to be done in proper Silo, and due care has to be taken to ensure high density of GGBS gets a solid steel structure. Look for more information on www.gpegroup.com.au

    Quote Originally Posted by Great Wall machinery View Post
    Ground granulated blastfurnace slag (GGBS) is a by-product from the blast-furnaces used to make iron. These operate at a temperature of about 1,500 degrees centigrade and are fed with a carefully controlled mixture of iron-ore, coke and limestone. The iron ore is reduced to iron and the remaining materials form a slag that floats on top of the iron. This slag is periodically tapped off as a molten liquid and if it is to be used for the manufacture of GGBS it has to be rapidly quenched in large volumes of water. The quenching, optimises the cementitious properties and produces granules similar to a coarse sand. This 'granulated' slag is then dried and ground to a fine powder.

      Although normally designated as "GGBS" in the China, it can also be referred to as "GGBFS" or "slag cement"
    Through the use of vertical grinding mill for grinding slag, waste slag grinding into slag powder.

      The major use of GGBS is in ready-mixed concrete, and it is utilised in a third of all China ‘ready-mix’ deliveries. Specifiers are well aware of the technical benefits, which GGBS imparts to concrete, including:

      •better workability, making placing and compaction easier

      •lower early-age temperature rise, reducing the risk of thermal cracking in large pours

      •elimination of the risk of damaging internal reactions such as ASR

      •high resistance to chloride ingress, reducing the risk of reinforcement corrosion

      •high resistance to attack by sulphate and other chemicals

      •considerable sustainability benefits
    In the production of ready-mixed concrete, GGBS replaces a substantial portion of the normal Portland cement content, generally about 50%, but sometimes up to 70%. The higher the proportion, the better is the durability. The disadvantage of the higher replacement level is that early-age strength development is somewhat slower.

      GGBS is also used in other forms of concrete, including site-batched and precast. Unfortunately, it is not available for smaller-scale concrete production because it can only be economically supplied in bulk. GGBS is not only used in concrete and other applications include the in-situ stabilisation of soil.
    You may have a look at this site:http://www.great-wall.co/

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  1. What is GGBS?And the usefulness of GGBS!
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    Last Post: 3rd August 2015, 9:21

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