PROPORTIONING FOR NON-AIR-ENTRAINED RCCP

This article presents the basic principles and a detailed procedure for proportioning non-air-entrained RCCP mixes. The procedure, called the optimal paste volume method, is a simple three-step process that usually involves a relatively small number of laboratory trial batches. The originality of the method is that workability and strength requirements are treated in two independent steps. Simple graphs are provided to help select the approximate volumetric paste dosage and w/cm to meet workability and strength requirements. Several trial batches (usually two or three) are required to precisely determine the final mix proportions that reflect the particular physico-chemical characteristics of the cementitious materials and aggregates.