Road structure – process – or apparatus – Traffic director – Vibration inducing member
Patent
1995-03-07
1996-10-01
Suchfield, George A.
Road structure, process, or apparatus
Traffic director
Vibration inducing member
404 32, 404 77, 404 79, 404 93, E01C 735, E01C 1943, E01F 904
Patent
active
055607349
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a method of laying a bitumastic simulated paved surface, to a paved surface so-laid and to bitumastic material particularly suitable for use in such a surface layer.
BACKGROUND OF THE INVENTION
There has been increased use recently of attractively paved surfaces which may use differently coloured stone slabs or bricks for use as a walk-on or drive-on paved surface with an aesthetically pleasing appearance, in some cases areas of different coloured bricks or paving providing guidance for drivers of vehicles, for example in showing routes and individual parking areas in car parks. A difficulty with such paved surfaces is their expense, particularly where individual slabs, bricks or blocks are laid since first a good foundation needs to be provided and then the paving needs to be carefully laid on that foundation, with it being necessary for the foundation and the blocks to be very stable and very firmly laid, in order to avoid the possibility of cracking the blocks under vehicle loading. It has been proposed to use a concrete simulated paved area in which concrete is laid and, while it is still soft, grooves are provided in its upper surface to simulate the spaces between individual paving stones. This concrete can be coloured to give the appearance of, for example, a brick laid area but generally this prior process has the disadvantage of the expense due to the need to excavate and provide a substantial foundation, with the concrete layer itself needing to be at least 150 mm thick if it is to be able to resist cracking and bear the load of vehicles passing thereover.
SUMMARY OF THE INVENTION
The present invention has an object to provide an improved surfacing material which will give the appearance of a paved area and which not only will be less expensive to lay but will also provide advantages as regards resistance to wear and waterproofing, as compared with prior surfacing.
An exemplary use of the simulated paved layer is to improve the appearance of traffic speed control humps on roads. In this connection, it should be noted that while herein we have referred to speed control humps, this term is also intended to cover speed control ramps and tables which are alternative terms sometimes used depending upon the cross-section of the hump and whether it has a substantially flat top surface.
There has, in recent years, been a development of the use of speed control humps for use in traffic calming schemes where humps are applied across the road to encourage drivers to drive more slowly if their travel is not to be made too uncomfortable or their vehicle damaged, due to excessive speed over the humps. Conventionally, these humps are presently produced either by using a tarmac material applied over the road where the hump is to be formed or by fabricating them using concrete paving blocks. The use of "MACADAM" road surfacing material, whilst cheap, is undesirable, especially where quite heavy traffic loads may be expected since "MADADAM" road surfacing material control humps tend to break up with the shock of repeated impacts from traffic wheels. Accordingly, the presently preferred construction is that using paving blocks but humps made using such blocks are several times more expensive than the "TARMACADAM" road surfacing material ones, due to the amount of preparation of the road, excavation being required to provide a proper foundation for the blocks, the increased expense of laying the blocks and the increased cost of the blocks themselves as compared with "TARMACADAM" road surfacing material.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present hump has some degree of resilience which whilst not in any way detracting from the effect of the hump in discouraging fast vehicle travel thereover, is far more resistant to wear, especially under high traffic loads, than the previous "TARMACADAM" humps and which is substantially cheaper to lay than the humps produced using blocks. Additionally, the softer more resilient structure for the humps means that i
REFERENCES:
patent: 4130516 (1978-12-01), Gagle et al.
patent: 5026609 (1991-06-01), Jacob et al.
patent: 5033906 (1991-07-01), Jordan
patent: 5122009 (1992-06-01), Vivier
patent: 5215402 (1993-06-01), Stowell et al.
Lucas Graham J.
McIntosh James
Roadtex Limited
Suchfield George A.
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