The product selector has been designed to aid you in the decision making process when specifying materials for your project.
All SteelPhalt slag aggregates typically achieve a PSV of 63. However, following research undertaken by Transport Research Laboratory and published in reports PPR737, PPR773 and PPR810, SteelPhalt’s products performed satisfactory in all the categories identified in the highlighted cells within the table below (which is taken from HD 36/06) and where the recommended PSV is frequently higher than 63.
To see what alternative products could be used, just hover the cursor over the required cell to show which SteelPhalt products we suggest.
Any products / values not highlighted indicate there are no products currently available.
NOTE: All options are SteelPhalt's recommendations but ultimately the product choice is down to the customer. Where designers are knowledgeable or have other experience of particular site conditions, an alternative PSV value can be specified.
|Site Category||Site Description||IL||Minimum PSV required for given IL, traffic level and type of site|
|Traffic (cv/lane/day) at design life|
|A1||Motorways where traffic is generally free-flowing on a relatively straight line||0.30||50||50||50||50||50||55||55||60||65||65|
|A2||Motorways where some braking regularly occurs (e.g. on 300m approach to an off-slip)||0.35||50||50||50||55||55||60||60||65||65||65|
|B1||Dual carriageways where traffic generally free-flowing on a relatively straight line||0.30||50||50||50||50||50||55||55||60||65||65|
|B2||Dual carriageways where some braking regularly occurs (e.g. on 300m approach to an off-slip)||0.35||50||50||50||55||55||60||60||65||65||65|
|C||Single carriageways where traffic is generally free-flowing on a relatively straight line||0.35||50||50||50||55||55||60||60||65||65||65|
|G1/G2||Gradients >5% longer than 50m as per HD 28||0.45||55||60||60||65||65||68+||68+||68+||68+||HFS|
|K||Approaches to pedestrian crossings and other high risk situations||0.50||65||65||65||68+||68+||68+||HFS||HFS||HFS||HFS|
|Q||Approaches to major and minor junctions on dual carriageways and single carriageways where frequent or sudden braking occurs but in generally a straight line||0.45||60||65||65||68+||68+||68+||68+||68+||68+||HFS|
|R||Roundabout circulation areas||0.45||50||55||60||60||65||65||68+||68+||HFS||HFS|
|S1/S2||Bends (radius <500m) on all types of road, including motorway link roads; other hazards that require combined braking and cornering||0.45||50||55||60||60||65||65||68+||68+||HFS||HFS|