Recycling Seal Coat Pavements with Self-Cementing Fly Ash. Phase 1 Final Report

摘要

It is proposed that existing pavements can be pulverized in place, sufficient quantities of Class C fly ash and water added, and the resulting mixture compacted to produce a stabilized pavement base section. A laboratory study was conducted to evaluate the degree of stabilization that could be attained and the physical factors influencing the degree of stabilization. Amount and maximum diameter of hydrocarbon bound particles, gradation of mineral aggregate, fly ash content and use of a retarder were studied. The laboratory study was supplemented by information obtained from construction of a field test section. Influence of the self-cementing fly ash on the recycled mixtures was evaluated on the basis of compressive strength, CBR and durability as evaluated by vacuum saturation in accordance with ASTM C-593. The study indicates that the proposed recycling procedure is both technically and economically feasible.