Charcon brochure

INSTALLATION GUIDE

INSTALLATION DESIGN-UNITS 3-6 mm 600 mm nominal Linear drainage unit Wearing Course Base Course Wearing Course Base Course

Cementitious road base

Bitumous road base

150 min 150 min

GENERAL PRINCIPLES All units are unreinforced: protect from stresses caused by thermal expansion of cementitious paving materials. Leave 1mm gap between each unit to prevent damage from thermal expansion of the units themselves. Expansion joints MUST be installed on each side of drainage runs in concrete pavements or those incorporating a cement bound/lean mix concrete roadbase. DO NOT place these joints directly adjacent to any trafficked unit as this would allow units to rock under trafficking and may allow water ingress into the base or sub- grade. Recommended position of joints (minimum distances): ST4 concrete bed and haunch. Haunch to extend to half unit height. 25mm class 1 mortar mix 1:3 Allowance made for expansion of cementitious roadbase or reinforcement of concrete surround 3-6 mm 600 mm nominal 600 mm nominal 150 min 150 min Linear drainage unit RC slab expansion joint as opposite 25mm thick highly compressible joint filler topped with 25x25mm polysulphide or similar mastic sealant 25mm class 1 mortar mix 1:3 3-6 mm Charcon Europa Block Paving Stretcher course of CBP on mortar or 50mm of granolithic concrete PC Kerb as edge restraint Linear drainage unit

HAUNCHING Recommended typical haunches (to within 100mm of top unit) are: For Clearway / Safeticurb ® / Mini Highway ST4 concrete For Highway ST1 concrete minimum 125mm width

Note: As Highway units are not regularly trafficked, expansion joints could be placed directly against them. However, 125mm distance is recommended to avoid ingress of water between the unit and carriageway construction. BASE FOUNDATIONS Recommended typical foundations are: For Clearway/Safeticurb ® Minimum 150mm depth of ST4 concrete with a 25mm bed of Class 1 mortar (1:3 cement: sand) to allow easy adjustment of units to line and level For Highway Minimum 75mm of concrete Note: Strength, overall depth and width of the base may need to be increased when laid on low - strength sub-grades. For Mini Highway Minimum of 100mm depth of ST4 concrete

Sand bed

100

100

25mm class 1 mortar mix 1:3

600mm from Clearway/Safeticurb ® units (see Figs 11-13) 125mm from Highway units (see Figs 5-6) 25mm class 1 mortar mix 1:3 ST4 concrete bed and haunch 150 min

Extent of additional haunching required to ensure lateral stability on minor roads with minimal depth of carriageway construction

Channel grating

Surfacing

Footway or verge

100 mm max

Class 1 mortar Top unit

Class 1 Mortar*

Standard highway Base Unit

Concrete haunch

Concrete base & haunch

min 125

460

125 min

460

Fig 5. Standard top base unit

Fig 5a. Highway joint detail

Fig 6. Channel grating/concrete drainage top

147

TECHNICAL INFORMATION: charcon.technical@aggregate.com

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