Appropriate standards have been developed for low-volume roads in kenya. In the post-independence era, the road network expanded considerably and there was rapid depletion of high-quality materials both for maintenance and for new construction. The network had also expanded into difficult areas, devoid of high-quality road building materials but of high agricultural and economic potentials. Therefore the low-cost pavement research program was started in 1982 with the aim of optimizing the use of local materials of marginal quality forpavement layers and thereby reducing total road costs. Particular emphasis was put on using laterites, quartzites, coral gravels, and weathered rock, on subbase, base, and surface layers. Different bituminous binders--straight-run bitumen, short residue, cut backs, and emulsions--were also studied. In order to achieve optimum results, the program was targeted to areas devoid of high-quality materials forpavement and surface layers. Several trial sections were located onvarious low-volume roads throughout the country. This paper appearsin transportation research record no. 1291, Fifth international conference on low-volume roads, may 19-23, 1991, raleigh, north carolina, volume 2.
Samenvatting