Rubber Added Fly Ash for Underground Petroleum Tanks

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Title: Rubber Added Fly Ash for Underground Petroleum Tanks

Author(s): G. Baykal and K. Koprulu

Publication: Special Publication

Volume: 153

Issue:

Appears on pages(s): 549-560

Keywords: fly ash; permeability; rubber; seepage; subsurface structures; tanks (containers); wastes; Materials Research

Date: 6/1/1995

Abstract:
Due to increasing volumes of fly ash production each year, new utilization areas must be found. A new application had been developed at Bogazici University. Fly ash with various weight percentages of rubber tire chips were mixed and compacted at a water content wet side of optimum. Sealed single ring infiltrometer and falling head permeability tests were conducted on these specimens with water and gasoline as the permeants. Unconfined compression and split tensile strength tests were conducted to evaluate the mechanical behavior of the proposed liner material. When gasoline was permeated through rubber-fly ash specimens, a decrease was observed in the permeability as compared to that measured during water permeation. This decrease is due to the physical characteristic of rubber, expansion upon contact with gasoline. The expanded rubber holds some portion of the gasoline in itself, while sealing the voids and blocking the passageways for further leakage. For the above-mentioned technique, patent protection has been applied. This technique has a good application in the field because the liability for the underground petroleum storage tanks will decrease considerably when this technique is used.