PROCESS FOR MAKING EXPANSION JOINT MATERIAL

摘要

A process of producing an asphalt-impregnated fiberboard comprises the steps of forming an aqueous slurry of a fibrous material, asphalt and rubber, mixing the slurry to uniformly distribute its components, dewatering the slurry to form a wet mat, pressing the wet mat to consolidate it, and drying the consolidated wet mat. Fiberboards made by the process can be employed as durable resilient expansion joints between various types of structural members.