1887

n Journal of the South African Institution of Civil Engineers - Comparative strength parameters of waterbound macadam and crushed stone basecourses : technical paper

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Abstract

The reintroduction of waterbound macadam (WBM) as a basecourse for roads could result in a significant increase in employment per unit of expenditure in road construction, and high quality roads could be produced. The WBM and crushed stone design catalogues in the road design manual TRH4 (CSIR 1985) recommend similar layer thicknesses for the various traffic and road categories. Comparative strength tests have now been carried out that indicate that designs for roads with WBM basecourses may not need to be as conservative as designs for roads with crushed stone basecourses.

Die herinstelling van watergebinde macadam (WBM) kroonlae kan vir 'n merkwaardige toename in werksgeleenthede per eenheidskoste van padkonstruksie sorg, tesame met die bou van paaie van hoe gehalte. Die ontwerpgids vir paaieTRH4 (WNNR 1985) gee dieselfde aanbevelings wat laagdiktes ens betref, vir beide WBM en gewone gebreekte klip (klipslag) met betrekking tot verskeie verkeerspatrone. Druksterktetoetse wat onlangs uitgevoer is, het bewys dat die ontwerp van paaie met WBM-kroonlae nie so konserwatief soos die gewone klipslag hoef te wees nie.

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/content/civileng1/35/3/EJC26714
1993-01-01
2016-12-08
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