Natural Asphalts: Their Occurrence, Properties and Use in Road Construction in Columbia

摘要

This report describes the results obtained from a field and laboratory study of natural rock asphalts occurring in the Intendencia of Caqueta, Republic of Colombia. The aims of the study were to locate sources of asphalt, to estimate available quantities and, by testing representative samples, to evaluate the suitability of the asphalt for use either as bases or surfacings in a proposed road building project. (Copyright (c) Crown Copyright 1982.)