Ground Granulated Blast furnace Slag consist essentially silicates and alumino silicates of calcium. Portland cement is a good catalyst for activation of slag because it contains the three main chemical components that activate slag: lime, calcium sulphate and alkalies. The material has glassy structure and is ground to less than 45 microns.
Blast Furnace Slag - Material Description ORIGIN In the production of iron, iron ore, iron scrap, and fluxes (limestone and/or dolomite) are charged into a blast furnace along with coke for fuel. The coke is combusted to produce carbon monoxide, which reduces the iron ore to a molten iron product.
Steel Slag - Material Description ORIGIN Steel slag, a by-product of steel making, is produced during the separation of the molten steel from impurities in steel-making furnaces. The slag occurs as a molten liquid melt and is a complex solution of silicates and oxides that solidifies upon cooling.
Under the final rule, facilities are subject to recordkeeping requirements, requirements to notify the State, and a requirement to develop and maintain a publicly available Internet site containing information on facilities' actions to comply with the elements of the final rule.
Generally, any weld is of good quality if it meets appearance requirements and will continue indefinitely to do the job for which it is intended. The first step in assuring weld quality is to determine the degree required by the application. A standard should be established based on the service requirements.
Properties and Uses of Iron and Steel Slag MF 182-6 NATIONAL SLAG ASSOCIATION Page 5 Granulated blast-furnace slag is produced by quickly quenching (chilling) molten slag to produce a glassy, granular product. The most common process is quenching with water, but air or a combination of air and water may be used.
Steel slag, a by-product of steel making, is produced during the separation of the molten steel from impurities in steel-making furnaces. The slag occurs as a molten liquid melt and is a complex solution of silicates and oxides that solidifies upon cooling.
The viscosity (or fluidity) of the slag is also an important property. However, here there are somewhat conflicting requirements. A good slag for the metallurgical practice should have a high fluidity (low viscosity), whereas, a good slag in terms of refractory wear should have a low
• Steel slag is a uniquely stable, cementitious aggregate • Sub base materials produce high proctor values, typically 135-145 lbs/ft3 at optimum moisture GOOD FLOW CHARACTERISTICS • Good flow characteristics for easy placement and compaction • Quality-controlled; can be graded to meet various Department of Transportation requirements
The fact is that any soil or gravel base course is going to compress if the load is high enough, unless the slab is placed on solid rock. And in some ways that's good, because slabs curl and if the base can deflect a little, it can continue to provide support for the slab even when it curls.
Once a good relationship with a supplier is established, slag cement can be used at a higher percentage than fly ash. In most cases, slag cement can be used as a 30-50% replacement to portland cement, reducing the carbon impact of the concrete. To check for suppliers in your area, use the SCA's slag cement locator.
According to German experiences steel slag aggregates are suitable for unbound layers and asphalt layers if the expansion does not exceed the requirements for category V A. Steel slag aggregates, therefore, have a suitable volume stability if the expansion is limited to 5 and 3.5% respectively.
somewhat conflicting requirements. A good slag for the metallurgical practice should have a high fluidity (low viscosity), whereas, a good slag in terms of refractory wear should have a low fluidity (high viscosity) to insure minimum penetration and reaction, and good coating formation.
Some important requirements when using Slag Ball:. 1. How to determine the time and position of the slag ball? When the tapping is 3/4, the slag ball is dropped from the upper side of the taphole from the slag surface by 500mm with a special device, and the slag blocking effect is the best.
• Max temp 160 ºF (if slag concrete 170 ºF) • Max temp difference 35 ºF • Class F fly ash 25 to 40 % • Slag 50 to 75% • Max initial concrete temperature 95 ºF • Thermocouples to be cast in-line vertically in the structure to measure the thermal gradient between the core and the surface