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Granular Subbase (GSB) is a durable, high-performance crushed gabbro aggregate supplied per metric ton for use in road construction and civil infrastructure projects. Produced from Abronn’s quarry deposits of high-grade GABBRO, this material is engineered to provide excellent load-bearing capacity, compaction performance, and long-term stability as a subbase layer beneath pavements, yards, and industrial platforms.

Quality & Standard Reference:

Our quarry material includes Armour Rock quality aligned with international practice and confirmed to:

• CIRIA / CUR / CETMEF (2007)
• C-683

Typical Applications:

• Road and highway subbase layers
• Industrial yards, hardstands, and laydown areas
• Infrastructure backfilling where strong, durable aggregate is required
• Projects requiring high-quality gabbro-derived aggregates