RC35 / PAV2
The grade RC35 (or labelled PAV2) corresponds to a characteristic compressive strength around 35 N/mm², paired with air-entrainment for external durability. This mix is designed for heavier duty applications than standard domestic slabs: where reinforcement is embedded, vehicle loadings are higher, or external exposures are more demanding.
Technical details
- Compressive strength ~35 N/mm² at 28 days
- Air-entrained (PAV2) variants enhance weather/durability performance in freeze/thaw or salt?laden environments
- Mix design includes higher cement content, lower water/cement ratio, better aggregate grading and more stringent control of materials
- Reinforcement is often present – thus correct cover, compaction, and placement are critical
- For industrial/external loads, slab design should consider modulus of elasticity, shrinkage, joint spacing, load concentrations and fatigue. (See design codes such as EN?1992?1?1 for details)
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Typical applications & key benefits
Typical applications
- Heavy-duty external paving for industrial units, yards, plant areas, agricultural yards
- Raft foundations and piling slabs where loads are higher and reinforcement is embedded
- External slabs subject to frequent vehicle movement (forklifts, HGVs) and turning zones
- Storage yards for heavy goods, loading bays, logistics facilities
- Areas where long life and durability with minimal maintenance are demanded
Key benefits
- Significantly higher strength and durability than standard mixes – ideal for demanding use
- Air-entrained for improved freeze/thaw and salt exposure durability on external surfaces
- Compatible with reinforcement, giving structural integrity for industrial slabs
- Lower lifecycle cost due to less maintenance, fewer repairs, extended durability
Specification & durability considerations
- Ensure the slab design accommodates heavy vehicle loads, turning, dynamic loads, concentrated wheel loads, and fatigue
- External exposure may be classified as XF or XD (freeze/thaw, de-icing salts) – check that mix/admixture meets required exposure class
- Jointing and slab layout must suit heavy duty use (e.g., appropriate contraction/expansion joints, dowelled or not depending)
- Reinforcement placement and concrete cover must meet structural drawings and standards
- Curing, finishing and timing of traffic are key; heavy loads too soon can damage slab
Ordering & delivery advice
Provide: slab thickness, reinforcement/mesh details, traffic loading (type of vehicles, frequency), vehicle turning zones, finish required (power-float, broom finish or steel trowel), external environment (salt, freeze/thaw), pumping requirements, accessibility. Inform of any early loading or overlay requirements.







































