INSTALLATION GUIDE
MAINTENANCE SURFACE WATER DRAINAGE MAINTENANCE
PAVING MAINTENANCE AND CLEANING Maintenance, Cleaning And Sealing of Interlocking Concrete Pavements When properly installed, precast concrete pavements have very low maintenance and provide an attractive surface for decades. Under foot and tyre traffic, concrete pavements often become exposed to dirt, stains and wear. This is common to all pavements. During the initial life of the pavement the joints between the pavers will be relatively porous. The ingress of water will consolidate the jointing sand and it is important that the joints are regularly filled with jointing sand to replace the sand consolidated by rainwater. The joints will soon become semi- impervious due to detritus tending to seal the joints. Until this has occurred the paving should only be brushed by hand. Mechanical sweepers and in particular sweepers with high suction forces should not be used. If they are used there is a real risk of loss of jointing sand from between the pavers. A liquid substance which stabilises joint filling sand, impedes its unwanted removal by suction cleaners and at the same time helps to prevent the ingress of water during the early lift of the pavement may be used. If any form of surface sealing is used on the pavers it must be applied in strict accordance with the manufacturers instructions and it must be accepted that it may have an effect on the colour of the paving, its skid slip resistance and may require on-going maintenance.
Routine maintenance procedures Inspect system regularly for obstructions, or heavy detritus build-up. Empty gully pots/inspection chambers to remove all silt. Where necessary, cleaning or unblocking can be achieved by: High pressure water jetting Hand rodding For Highway/Mini Highway If necessary, cut back road surfacing adjacent to inlet holes in order to ensure unimpeded access for surface water. Routine maintenance procedures Inspect system regularly for obstructions, or heavy detritus build-up. Empty gully pots/inspection chambers to remove all silt. Where necessary, cleaning or unblocking can be achieved by: High pressure water jetting Hand rodding GOOD PRACTICE The following are general principles of good site practice which will contribute to successful installations: Handling Handle all products with care on site. Avoid damage to edges and faces. On-site storage Prior to installation, stack materials bed on bed on a hard level surface: protect from rain. Sitework Protect channels and gratings from concrete droppings and mortar splashes during installation. This may be achieved by temporary covering of openings with hardboard or plywood sheeting. Protect slot apertures (especially if no iron insert is included) from stone damage during construction, particularly where site vehicle trafficking is likely after system installation. Do not begin construction of adjacent footways and/or surfacing of carriageways until base and haunch concrete have achieved adequate strength.
General With correct design and installation, maintenance needs for all linear drainage systems should be minimal. However, it is essential to continued efficient drainage performance that all channels, inlets and outlets are kept free from blockage or accumulations of silt and debris. To that end, regular inspection is recommended. Frequency of inspection and maintenance is dependent on local conditions, the surrounding environment, and on the actual gradient within the installed system. Any temporary blockages can be successfully eliminated provided that: Sufficient inspection/access points are designed into the system No hardened material is allowed to choke the bore Commissioning and handover On completion of installation: Flush all excess mortar and building debris from the bore Empty silt traps Clean out/clear all inlet holes (including slots or grid apertures) For Safeticurb ® units DBA Slot apertures without cast iron inserts can be damaged when stones are impacted into the slot by vehicles. Clear all loose stones. (Slots should also be protected during construction when stones are present). For Safeticurb ® units DBA/DBK Ensure slot apertures are cleared of all loose stones. (This is especially important when adjacent soft landscaping works are undertaken). Further advice is available from the Technical Services Department, tel 01335 372222.
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TECHNICAL INFORMATION: charcon.technical@aggregate.com
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