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- W754483587 abstract "This article outlines how to produce 'whisper' concrete, and reports two trials of its use in the UK. 'Whisper' concrete is an exposed aggregate concrete surface, which was first developed in Austria about six years ago. During its production, a 40mm deep upper layer, consisting of a special mix containing high-quality non-skid aggregate, is laid 'wet on wet' over a 200mm thick lower layer, containing typical concrete aggregate such as limestone or gravel. The surface is then sprayed with a chemical retarder, to prevent the cement mortar from setting at the surface. 12-24 hours later, the surface is mechanically brushed, and the cement mortar removed, to create a surface with a special texture. The first 'whisper' concrete trials in the UK, were approved a few years ago with the aim of producing a concrete road surface at least as quiet as hot rolled asphalt. A 1.2km section was laid on the M18 motorway in December 1993, and a 4km section was laid on the A50 trunk road in May 1995. The Transport Research Laboratory (TRL) is now monitoring the performance of both these stretches of road. The trial results show that the 'whisper' concrete surfaces are about 2-3 dB(A) quieter than hot rolled asphalt, and have least as good skid resistance. The tone of the new surfaces' noise also seems to be more acceptable." @default.
- W754483587 created "2016-06-24" @default.
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- W754483587 date "1996-01-01" @default.
- W754483587 modified "2023-09-26" @default.
- W754483587 title "WHISPER CONCRETE: AN ADVANCE IN LOW NOISE, LONG LIFE ROAD TECHNOLOGY" @default.
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