Is slag the same as fly ash?

Concrete Properties Slag cement is a more uniform product than fly ash. As a result, concrete made with slag cement will generally have more uniform properties than concrete made with fly ash.

Is slag good for concrete?

The use of slag in concrete has several benefits, including reduced energy, reduced greenhouse gas emissions, and reduced use of raw materials.

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. It is a recovered industrial by-product of an iron blast furnace.

Which cement is best for concrete?

Both OPC and PPC cements are good for construction of concrete slab. OPC is the most commonly used cement in industrial and large construction, PPC is most commonly used for small residential constructions. PPC is used where possibilities of sulphate attack is higher as it has good sulphate resistance compared to OPC.

Why slag is used in cement making?

The use of slags in raw mixes increased the mechanical strength of cements by over 50%.

Where is slag cement used?

Slag cement is used in virtually all concrete applications: Concrete pavements. Structures and foundations. Mass concrete applications, such as dams or retaining walls (SCIC #9, “Reducing Thermal Stress in Mass Concrete”)

Does slag break down?

Air-cooled blast furnace slag, even though is quite brittle and prone to breakdown under impact loading, has a hardness measured by the Mohs scale between 5 and 6 (similar to durable igneous rock).

Does slag cause rust?

A weld slag inclusion can cause corrosion of the weld. The contact of the two different materials (the weld and the slag) may result in rapid oxidation. Slag inclusions can also form crevices that allow for a higher corrosion rate.

How does slag effect concrete?

Slag cement is most widely used in concrete, either as a separate cementitious component or as part of a blended cement. It works synergistically with portland cement to increase strength, reduce permeability, improve resistance to chemical attack and inhibit rebar corrosion.

Is fly ash and slag cheaper than 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.

What is fly ash in concrete?

Fly Ash is the most widely used SCM in concrete and is a byproduct of coal combustion in electric power generating plants. The use of fly ash in concrete can contribute to LEED points through local materials, recycled contents and innovation credits.

What is slag cement?

Slag cement, originally known as ground granulated blast-furnace slag (GGBFS), is a byproduct from the production of iron. The blast furnace is used to refine iron ore into iron and the resulting components from the heating of ingredients are iron and molten slag.

Should I use fly ash or slag in my volumetric mixer?

With the combination of both cost savings and strength increase, SCMs such as fly ash and slag should always be considered for certain applications. Learn more about how to set up your volumetric mixer with a fly ash bin by contacting the Bay-Lynx team at 905-304-3900.