Abstract
In this papaer, at first, the empirical equations for predicting the dry density, achieved by 8 passes with full-sized rollers, were derived from the data of the compaction tests carried out with small-sized smooth steel-wheeled rollers and small-sized pneumatic tyre-type rollers, under the condition of various diameters, weights and a given width.
We showed that the increment of dry density achieved by 8 passes could be expressed by the exponential function of the factor W/B2Dγd0 indicating the compaction capacity of the rollers, coefficients. a1, a2 in those equations by the linear function of the ratio (w/wopt) of the moisture content to the optimum moisture content for compaction and other coefficients b1, b2 by the palabola function of the, ratio.
Secondly, the relation between experimental coefficients aγ, bγ, which were derived in the equation relating to the number of passes and the rolled-dry density, and the ratio (w/wopt) were considered as follows.
The products of coefficient aγ by initial dry density γd0 was expressed by the hyperbolic function of the ratio, while bγ, γd0 were the result of the palabola function of the ratio.
