Plasticizer admixture GGBS

pavingfor concrete structuresfor outdoor use

Overview
Added to construction materials to lower carbon and improve performance and durability. When used in combination with cement, GGBS is a cementitious addition that helps produce lower carbon concretes and offers improved long-term performance and durability compared with Portland cement alone. It reduces the risk of early-age cracking in large concrete pours and improves resistance to aggressive ground conditions and chemical attacks.

Benefits

• Reduced risk of early-age cracking in large concrete pours
• Improved durability against sulfate attack and aggressive ground conditions
• Enhanced resistance to chloride ingress
• Reduced risk of alkali–silica reaction
• Lower embodied CO2 than Portland Cement (reduced life‑cycle carbon footprint of mixes)
• Quality assured with independent third‑party certification and a UKCA Mark

Applications

• Grout
• Engineered solutions
• Marine works
• Concrete block paving
• Soil stabilisation
• Tunnelling

User guidance
Concrete, mortars and grouts containing Portland cements and GGBS must be specified and used correctly for best performance. The cement content must be correct and the water:cement ratio should be as low as possible consistent with satisfactory placing, thorough compaction and effective curing. The final finish quality depends on the user having the required skills and familiarity with the materials and application methods. Tarmac cannot be held responsible where workmanship has not been carried out in accordance with good practice.

Characteristics / technical specifications

• Product commercial name: Ground Granulated Blast Furnace Slag (GGBS)
• Product type: cementitious addition for bulk cement/concrete blends
• Primary function: reduce embodied CO2 and improve durability/performance of concrete
• Strength: strength gain observed after 28 days (typical performance characteristic)
• Durability: enhanced sulfate resistance and improved chloride resistance
• Alkali risk: reduces risk of Alkali‑Silica Reaction
• Quality assurance: independent third‑party certification; UKCA Mark
• Specification notes: ensure correct cement content, minimise water:cement ratio, ensure satisfactory placing, compaction and curing
• Typical supply form on site: bulk cement (bulk handling/discharge arrangements as per bulk cement products)