Abstract
A revised method is proposed for the testing of binder distributors for uniformity of transverse distribution of binder: it uses a light fuel oil with physical properties at low temperatures equivalent to those of surface dressing binders at normal elevated spraying temperatures. The temperature of test is reduced from around 150 degrees c to 40 degrees c and efficiency of testing is improved because the operatives carrying out the tests work in a less dangerous environment. A simple empirical test is proposed for assessing the point at which the test material becomes unsuitable for further use by reason of contamination by bituminous residues in the binder distributors. (Author/publisher)