Technical guide - Continuous hot mix production
The French expertise
The document presents the French experience on the continuous manufacture of hot-coated materials. The technique is strong of thirty years of developments and concerns today half of the hot-coated materials production. This development has been made possible and easiness by a joint work between the plants manufacturers, the contractors of works, the awarding authorities and contract managers.
The document presents the French experience on the continuous manufacture of hot-coated materials. The technique is strong of thirty years of developments and concerns today half of the hot-coated materials production. This development has been made possible and easiness by a joint work between the plants manufacturers, the contractors of works, the awarding authorities and contract managers.
The bituminous mixing plants are on the whole one half - thousand of units, 20 % are mobile plants, in majority continuous, and 80 % are stationary plants, of which 35 % are continuous.
The expansion of the continuous technique is at once due to the large national programs of new and maintenance works towards 1970, to the formalization of the quality requirements on the production of aggregates and on the composition of materials, and to the successive technological improvements on the continuous plants. These last allow today the incorporation of some recycled aggregates until 50 % of the end product, and respect the strictest environmental standards dealing with release of gas.
After a brief recall of the two types of process: continuous and discontinuous, and a detailed description of the components and the working of a continuous plant, the document describes two real cases of sites.
