Patent ID: 6503318
Filing Date: 2003-01-07
Classification: C04B,H01B,Y10S

Abstract:
A method for making conductive concrete, the method comprising the steps of:(A) mixing coarse porous conductive coke aggregate particles with water to form pre-saturated coke particles, said coke particles having particle sizes greater than 3 mm and an open pore volume that when saturated have a water content of about 10 to about 25%; (B) adding to the pre-saturated coke particles a superplasticiser and mixing to disperse the superplasticiser; (C) adding a Portland cement binder to the superplasticiser treated pre-saturated coke particles and mixing to form an aqueous concrete mixture having a weight ratio of water to cement binder of about 0.2 to 0.75; (D) adding to said aqueous concrete mixture fine conductive coke aggregate particles having particle sizes less than 3 mm and mixing to form a moldable concrete mixture in which the coarse conductive coke particles comprise at least 50% by weight of the total conductive coke particles; (E) molding the moldable concrete mixture with compaction and vibration; and (F) curing the compacted concrete mixture by air-drying for at least about four hours.