Use of tank bottom sludge to construct and upgrade unpaved roads

Ramzi Taha, Hossam Hassan, Amer Al-Rawas, Basma Yaghi, Ahmed Al-Futaisi, Ahmad Jamrah, Yahya Al-Suleimani

Research output: Chapter in Book/Report/Conference proceedingChapter

3 Citations (Scopus)

Abstract

Tank bottoms are the liquids and residue, such as heavy hydrocarbons, solids, sands, and emulsions, that collect at the bottom of the treating vessel or that remain at the bottom of storage tanks after a period of service. Sludge composition is 50% to 65% crude oil, 20% to 35% water, and 5% to 20% solids. Disposal of tank sludge is a significant item of tank maintenance costs. Results are presented on the use of tank bottoms as a binder to construct and upgrade unpaved roads. Various sludge samples were initially characterized for chemical and physical composition, then three mixtures were prepared by using blends of aggregates and tank bottoms. No bitumen was used in the mixes. The mixtures include hot mix (aggregate and sludge were both heated), heated sludge and cold aggregate mix, and cold mix (no heat was applied). The Marshall mix design (ASTM D1559) was followed in the preparation and testing of the specimens. Results indicate that tank bottoms act as a binder to the aggregate and can provide significant strength. Heating both the sludge and the aggregate resulted in the highest stability value of 11.9 kN. An optimum sludge content of 6.5% by total weight of the mixture satisfied the requirements for low (3.3 kN) or medium (5.3 kN) trafficked surfaces or base layers according to Asphalt Institute specifications. Other mix properties, such as flow, air voids, voids in mineral aggregate, and voids filled with asphalt, were acceptable.

Original languageEnglish
Title of host publicationLow-Volume Roads
Pages208-214
Number of pages7
Volume1
Edition1989
DOIs
Publication statusPublished - 2007

Publication series

NameTransportation Research Record
Number1989
Volume1
ISSN (Print)0361-1981

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ASJC Scopus subject areas

  • Civil and Structural Engineering

Cite this

Taha, R., Hassan, H., Al-Rawas, A., Yaghi, B., Al-Futaisi, A., Jamrah, A., & Al-Suleimani, Y. (2007). Use of tank bottom sludge to construct and upgrade unpaved roads. In Low-Volume Roads (1989 ed., Vol. 1, pp. 208-214). (Transportation Research Record; Vol. 1, No. 1989). https://doi.org/10.3141/1989-24