What Are Supplementary Cementitious Materials?
About SCM
Supplementary cementing materials (SCMs) are materials added to the process of making concrete that make it more economical, enhance strength and durability and help reduce the overall C02 emissions of concrete.
SCMs Reduce Carbon Foot Print
SCMs are used to substitute either portland cement clinker in the production of composite cements or cement in the production of concrete. The use of SCMs is widespread in the concrete industry because of the economic and performance benefits they provide. Recently, SCMs have been receiving increasing attention for the role they play in reducing the carbon footprint of concrete, since the energy use and CO2 emissions from portland cement clinker manufacturing significantly outweigh those of other concrete components, and SCMs have a smaller environmental impact than portland cement clinker [1]. The demand for high quality SCMs is large, as exemplified by the fact that the world average clinker factor (percentage of clinker in cement) decreased from 0.85 in 2003 to 0.77 in 2010, and long-term predictions are that this number will continue to decrease as far as 0.71.
Fly ash, the most commonly used pozzolan in concrete, is a by-product of thermal power generating stations. Commercially available fly ash is a finely divided residue that results from the combustion of pulverized coal and is carried from the combustion chamber of the furnace by exhaust gases.
Fly Ash Limitations
As a by-product of burning coal, fly ash has seen a dramatic drop in availability, as many coal fired electrical plants are being off-lined due to environmental pressure related to air pollution. Many plants are being converted over to burn natural gas, which is both cheaper and cleaner than coal. This leaves the concrete/cement industry looking for a new, more reliable resource to replace fly ash.
THE FUTURE OF FLY ASH / Caltrans Report
The Important future Of SCM Materials
As the supply of fly ash decreases, alternative SCMs will play a major role in the construction industry where concrete is used. Attached is a detailed paper discussing the relevance of natural pozzolan and other SCM solutions.
MORE ABOUT SCM MATERIALS / Mineralogical Society Of America
Concrete In Practice
n its most basic form, concrete is a mixture of Portland cement, sand, coarse aggregate and water. So what sounds simple is really an exact science of mixtures and byproducts. The attached document explains in detail the science of concrete and how SMC’s enhance modern day concrete.
Industry News
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Go back in time with us as we dive into the Amador County newspaper archives from the late 1800's and throughout the 1900's and see what they were saying about the kaolin clay deposits here in the Ione area, and how they still relate to us and our operations today!...
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Time Travel Tuesday – November 2024, From the Amador Ledger Archives
- Time Travel Tuesday - November 2024, From the Amador Ledger Archives Go back in time with us as we dive into the Amador County newspaper archives from the late 1800's and throughout the 1900's and see what they were saying about the kaolin clay deposits here in the...
Time Travel Tuesday – October 2024, From the Amador Ledger Archives
- Time Travel Tuesday - October 2024, From the Amador Ledger Archives Go back in time with us as we dive into the Amador County newspaper archives from the late 1800's and throughout the 1900's and see what they were saying about the kaolin clay deposits here in the...
Time Travel Tuesday – September 2024, From the Amador Ledger Archives
- Time Travel Tuesday - September 2024, From the Amador Ledger Archives Go back in time with us as we dive into the Amador County newspaper archives from the late 1800's and throughout the 1900's and see what they were saying about the kaolin clay deposits here in the...
Purebase provides its blended supplementary cementitious material to UC Davis Pavement Research Center for concrete test track
Purebase provides its blended supplementary cementitious material to University of California Pavement Research Center for concrete test track IONE, CA, AUGUST 29, 2024 (GLOBE NEWSWIRE) — Purebase Corporation (OTCQB: PUBC), a natural resource development company...
Time Travel Tuesday – Amador County is considered the heart of the Motherlode in California because of its ever-so-rich gold mining history
- Time Travel Tuesday - August 2024, From the Amador Ledger Archives Go back in time with us as we dive into the Amador County newspaper archives from the late 1800's and throughout the 1900's and see what they were saying about the kaolin clay deposits here in the...
Time Travel Tuesday – June 2024 See what they were saying about the kaolin clay deposits here in the Ione area.
- Time Travel Tuesday - June 2024, From the Amador Ledger Archives Go back in time with us as we dive into the Amador County newspaper archives from the late 1800's and throughout the 1900's and see what they were saying about the kaolin clay deposits here in the Ione...
Time Travel Tuesday – 07-09-2024 Go back in time with us as we dive into the Amador County newspaper archives from the late 1800’s
- Time Travel Tuesday - July 2024, From the Amador Ledger Archives Go back in time with us as we dive into the Amador County newspaper archives from the late 1800's and throughout the 1900's and see what they were saying about the kaolin clay deposits here in the Ione...
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