Why do we use Ggbs in concrete?
Why do we use Ggbs in concrete?
GGBS cement prevents the occurrence of efflorescence, the staining of concrete surfaces by calcium carbonate deposits. Due to its much lower lime content and lower permeability, GGBS is effective in preventing efflorescence when used at replacement levels of 50% to 60%.
What is Ggbs in construction?
GGBS (Ground Granulated Blast-furnace Slag) is a cementitious material whose main use is in concrete and is a by-product from the blast-furnaces used to make iron. This ‘granulated’ slag is then dried and ground to a fine powder.
What is concrete Ggbfs?
Regen Ground Granulated Blast furnace Slag (GGBS) is a cement substitute, manufactured from a by-product of the iron-making industry. Using one tonne of Regen in concrete reduces the embodied CO2 by around 900kg, compared to using one tonne of Portland Cement, and also increases its durability.
What is cement slag?
Slag cement is a hydraulic cement formed when granulated blast furnace slag (GGBFS) is ground to suitable fineness and is used to replace a portion of portland cement. Once the slag has been cooled and ground to a usable fineness it is stored and shipped to suppliers throughout the United States.
How does Ggbs affect concrete strength?
Compressive strength of concrete containing GGBS is increased by 6% to 17% than the ordinary concrete subjected tosulphate attack with the variation of age. 5. The concrete containing GGBS shows increase compressive strength by8% to 18% than ordinary concrete subjected to acid attack with variation of curing period.
What is OPC and Ggbs?
Ordinary portland cement (OPC) has been traditionally used in the construction of concrete silos in Ireland. However, the aggressive nature of the effluent produced by silage leads to severe degradation of the concrete. GGBS is a common addition to PC composites.
What is Colour cement?
Coloured cements are made by grinding 5 to 10 percent of suitable pigments with white or ordinary gray portland cement. Air-entraining cements are made by the addition on grinding of a small amount, about 0.05 percent, of an organic agent that causes the entrainment of…
What is a good alternative to cement?
Concrete: Cement Substitutes
- Pulverised Fuel Ash (PFA), aka ‘Fly ash’ as a cement substitute. PFA is a by-product of coal-burning power stations.
- Ground Granulated Blast-furnace Slag (GGBS) as a cement substitute. GGBS is a by-product of the iron and steel industry.
- Silica fume.
- Limestone fines.
- Alternative fuels.
What is GGBS construction material?
GGBS is one of the greenest construction materials. Manufacturing of Ground Granulated Blast Furnace Slag utilizes all of the slag material and produces no significant waste. The production of GGBS requires less than a fifth the energy and produces less than a fifteenth of the carbon dioxide emissions.
What are the advantages and disadvantages of GGBS?
Advantages of GGBS concrete Good workability which helps in better placing and compaction. Due to the less heat of hydration the temperature rise will be less avoiding the risk of thermal cracking in large volume of concrete. High resistance to chloride attack which reduces the risk of corrosion in concrete.
What is the strength of GGBS cement?
If 50% of GGBS is used in a concrete mix, it can develop almost same 28 day strength as ordinary Portland cement. At higher GGBS percentages the increased cementitious content may lead achieve equivalent 28 day strength much faster. GGBS concrete gains strength more steadily than equivalent concrete made with Portland cement.
What is ground granulated blast furnace slag (GGBS)?
Manufacturing of Ground Granulated Blast Furnace Slag utilizes all of the slag material and produces no significant waste. The production of GGBS requires less than a fifth the energy and produces less than a fifteenth of the carbon dioxide emissions.
