Argo Graphene Solutions Reports Graphene-Infused Concrete Test Improves Compressive Strength 11% over Design

Rhea-AI Summary

Argo Graphene Solutions (OTCQB: ARLSF) reported ASTM 28-day compressive strength results from a Bristol, Tennessee concrete pour dated November 20, 2025. Independent testing on three slabs (total 12.5 cubic metres) by Diversified Materials Testing showed an 11% increase in 28-day compressive strength, equivalent to 4,449 psi versus a 4,000 psi design mix. The company said results align with prior tests by the University of Melbourne and Ceylon Graphene and noted its new Regina, Saskatchewan facility will support formulation improvements. A 56-day cylinder break test is pending and the company will update shareholders when available.

Positive

• Compressive strength +11% (28-day)
• Measured 4,449 psi vs 4,000 psi design mix
• Independent testing by Diversified Materials Testing
• Onsite pour totaled 12.5 cubic metres across three slabs

Negative

• Results based on three slabs (limited sample size)
• 56-day cylinder break results pending confirmation

Vancouver, British Columbia--(Newsfile Corp. - November 20, 2025) - Argo Graphene Solutions Corp. (CSE: ARGO) (OTCQB: ARLSF) (FSE: 94Y) ("Argo" or the "Company"), a leader in innovative graphene-based technologies, is pleased to announce the results of its ASTM 28-day compressive strength test on the recent test pour of Argo's graphene-infused concrete mix in Bristol, Tennessee, which was initially announced on October 8, 2025.

The test was carried out by Diversified Materials Testing, LLC, based in Bristol, TN, USA, and involved industry-standard compressive strength tests (on days 7, 21, and 28) on three concrete slabs totalling 12.5 cubic metres. The poured slab sizes included two 20-foot-by-30-foot slabs on grade and one 15-foot-by-25-foot slab on grade.

The 28-day test results showed a total increase in compressive strength of 11%, or 4,449 psi, on a 4,000 psi design mix. The results from a 56-day cylinder break, when ready, are expected to further confirm Argo's graphene design criteria. The Company will provide a further update to its shareholders once the results are available.

"We are very pleased to see our results confirming an 11% increase on our first round of testing from a physical concrete pour onsite. We feel these results validate our thesis and business case of graphene-infused concrete as tested by the University of Melbourne and Ceylon Graphene. Our recently opened facility in Regina, Saskatchewan, is a great addition for the Company as we intend to improve on our formulation as we work to bring a game-changing product to market," said Scott Smale, CEO of Argo.

About Argo Graphene Solutions Corp.

Argo Graphene Solutions Corp. is a Canadian advanced materials company dedicated to developing sustainable high-performance solutions for the construction and agricultural industries. Through subsidiaries like Argo Green Concrete Solutions Inc. Argo leverages cutting-edge graphene technologies to create eco-friendly products that address global challenges in infrastructure renewal and carbon reduction.

For further information, please contact:

Scott Smale, CEO
Argo Graphene Solutions Corp.
Email: scott.smale@argographene.com
Phone: 306-596-2673
Website: www.argographene.com

LinkedIn: https://www.linkedin.com/company/97315371/admin/dashboard/
Instagram: https://www.instagram.com/argographene/
Facebook: https://www.facebook.com/argographene/
X / Twitter: https://x.com/ArgoGraphene

The Canadian Securities Exchange has not reviewed this press release and does not accept responsibility for its adequacy or accuracy.

Forward-Looking Statements
Certain information in this press release constitutes "forward-looking information" under Canadian securities legislation, including statements regarding the development of Argo's technology and the creation of eco-friendly products. Forward-looking statements are based on management's opinions and estimates as of the date of this release and are subject to known and unknown risks, uncertainties, and other factors that may cause actual results to differ materially. These factors include, but are not limited to, the receipt of necessary regulatory approvals. Argo undertakes no obligation to update forward-looking statements except as required by applicable securities laws. Readers should not place undue reliance on forward-looking information.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/275269

FAQ

What did Argo Graphene Solutions (ARLSF) report on November 20, 2025 about concrete strength?

Argo reported a 28-day compressive strength increase of 11%, measuring 4,449 psi on a 4,000 psi design mix from an onsite Bristol, Tennessee pour.

How were ARLSF's graphene concrete test results validated?

The tests were performed by Diversified Materials Testing on three slabs totalling 12.5 cubic metres, using industry-standard 7/21/28-day compressive strength protocols.

Do ARLSF investors have a follow-up timeline for additional test data?

The company said a 56-day cylinder break test is pending and will provide a further shareholder update when those results are ready.

What does the 11% strength improvement mean for ARLSF's commercial prospects?

The company views the 11% 28-day gain as validation of its graphene-infused concrete thesis and plans formulation improvements at its Regina facility to advance commercialization.

How large was the test pour that produced ARLSF's results?

The test pour comprised three slabs — two 20x30-foot slabs and one 15x25-foot slab on grade — totalling 12.5 cubic metres.