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Steel slag is not recommended for use in rigid confined applications – such as concrete aggregate, base or fill under structures or floor slabs, or backfill against structures or bridge abutments. Shape and Texture: Steel slag is a crushed product having hard, dense, angular and roughly cubical particles.
What does slag do to concrete?
It typically replaces part of the portland cement in concrete mixes. According to the Slag Cement Association, an industry trade group, incorporating slag cement as a supplement in concrete offers higher strength, reduced permeability and improved resistance to chemical attack.
Is slag cement good for concrete?
Supplementary cementing materials Concrete containing slag cement as partial cement replacement can have a higher slump and improved particle dispersion compared to concrete mixes without slag cement, irrespective of the use of water-reducing admixtures.
What is slag cement disadvantages?
The concrete using Ground Granulated Blast Furnace Slag (GGBS) has some disadvantages like as lower initial strength and higher dry shrinkage. Therefore, in this study, long term durability of concrete made with Metakaolin and GGBS under marine environment has been investigated.
Is slag good for a driveway?
Steel slag is the ideal material for unpaved parking lots or driveways. Steel slag properties include high angularity that provides stability, heavy unit weight to stay in place and “free lime” that provides for a weak cementing effect aiding compaction and is ideal for areas prone to heavy truck traffic.
What is a good substitute for concrete?
We have collated 11 green building materials that offer alternatives to concrete, and a lower environmental impact. Straw Bales. Grasscrete. Rammed Earth. HempCrete. Bamboo. Recycled Plastic. Wood. Mycelium.
Does slag make concrete stronger?
Slag cement improves many of the strength and durability properties of hardened concrete. Slag cement is a hydraulic binder that, like portland cement, reacts with water to form cementitious material (calcium-silicate hydrate or CSH). The resulting cement paste is stronger and denser, thus improving the concrete.
Is slag cement cheaper than portland cement?
Fly ash and Slag will typically be 18% cheaper than Portland cement. When a mix includes 20% fly ash, this will provide savings of 3.5% in cost. The advantage of slag is its ability to substitute more of cement. Giving savings of up to 9% in cement cost with a 50% slag to cement content ratio.
Is code slag a cement?
IS 455 (1989): Portland Slag Cement – Specification [CED 2: Cement and Concrete] Page 2 Page 3 Page 4 IS 455: 1.
What are the disadvantages of slag?
A disadvantage of LD slag is its greater weight compared to natural rock, and this has an impact on logistics and transport costs.
Is slag cement good for plastering?
There are three main Cement Grades from which you can choose. These are Ordinary Portland Cement (OPC), Portland Slag Cement (PSC) and Portland Pozzolana Cement (PPC) available in the market. OPC is available in two grades — 43 and 53. Both grades are considered best for plastering work.
What is the purpose of slag?
Slag floats on the surface of the molten metal, protecting it from oxidation by the atmosphere and keeping it clean. Slag forms a coarse aggregate used in certain concretes; it is used as a road material and ballast and as a source of available phosphate fertilizer.
Is slag good for anything?
Although the construction industry does use some slag as an aggregate, most is simply discarded. However, slag could be used to treat acid soils or acid mine drainage. Doing so would both offset the cost of restoring abandoned mine areas, as well as decrease steel manufacturers’ current waste footprint.
How much does a ton of slag cost?
Steel slag costs $25 to $39 per ton or $35 to $54 per yard, depending on the quantity ordered and size of stones. Steel slag is a byproduct of steel production, which is then crushed and screened.
How many yards is a ton of slag?
Approximate Weights of Various Construction Material Per Cubic Yard Material lbs./ cu. yd. tons/ cu. yd. Slag, screenings 2700 1.35 Slag, machine 2592 1.29 Slag, sand 1485 .74 Shale 4374 2.18.
What is poor man’s concrete?
Soil-cement is a mixture of Portland cement, natural soil, and water used to form a hard, semi-rigid paving surface. It is most often used in highways or as a sub-base for asphalt or other forms of paving, but it can also be used as a cheap stand-alone paving surface for driveways, sidewalks, patios, or garage floors.
What is the cheapest way to buy concrete?
What Is The Cheapest Way To Buy Concrete? The cheapest way to buy concrete is to mix your own by purchasing pre-mixed bags for $4.49 each and renting a concrete mixer for $120 per day. The second best way, it to buy a bulk truckload full (10 cubic yards) for $1,169 including delivery.
Why is concrete so cheap?
That’s because modern concrete is basically a mixture of water, aggregate (i.e., small rocks), sand and Portland cement. But concrete has attributes that cement alone does not. First, it’s more economical. Rock and sand are cheaper than cement alone, so mixing them in makes concrete cheaper than pure cement.
What is premium slag cement?
Portland Slag Cement, commonly known as PSC, is blended cement. Slag is, essentially, a non-metallic product comprising of more than 90% glass with silicates and alumino-silicates of lime. PSC has been voted as the most suitable cement for mass construction because of its low heat of hydration.
What is the difference between OPC and slag cement?
Due to presence of slag, PSC is usually lighter in colour than OPC. The words Portland Slag Cement is written on all PSC cement bags. Further, due to its improved properties, PSC is generally priced higher than OPC in the market.
How do you water new concrete?
DO spray new concrete with water. One of the most common methods for curing concrete is to hose it down frequently with water—five to 10 times per day, or as often as you can—for the first seven days. Known as “moist curing,” this allows the moisture in the concrete to evaporate slowly.
Which cement is best for roof?
Use of OPC 53 grade and PPC ( Portland pozzolana cement) is the best cement for roof dhalai and for all type of RCC structure like footing,slab, beam and column.
Can we use PSC cement for slab?
PSC’s chemical composition gives it several advantages over ordinary cement. PSC cement can be used for all types of residential and commercial projects. It complements work on dams and other water retaining structure due it is high resistance alkali-silica reactions and fewer shrinkage cracks.
What is fly ash cement?
Fly ash is used as a supplementary cementitious material (SCM) in the production of portland cement concrete. A supplementary cementitious material, when used in conjunction with portland cement, contributes to the properties of the hardened concrete through hydraulic or pozzolanic activity, or both.
