Extensive survey of the influence of oil products on the structural behavior of high and normal strength concrete

Dissertant

Dawud, Samir Fawzi

University

University of Technology

Faculty

-

Department

Department of Building and Construction Engineering

University Country

Iraq

Degree

Master

Degree Date

2000

English Abstract

Oil has a great importance in all fields of life.

It is a basic source of energy all over the world.

The storage of oil in reinforced concrete tanks has been investigated from the beginning of the century as a result of critical shortage of steel plates as well as the problems of serviceability, safety, and high maintenance costs associated with steel containers. Previous investigations studied the effect of oil products on the properties of multi typed concrete.

The present research deals with experimental test results of available investigations related with the permeability characteristics and mechanical properties of concrete exposed to oil products.

These properties included compressive strength (fc), splitting tensile strength (fsp), modulus of elasticity (Ec) and modulus of rupture (fr) as well as the elevated temperature effect of oil saturated concrete. Several empirical accurate relationships of such properties were obtained by using statistical analysis based on existing experimental works.

These relationships were used widely in the design procedures of reinforced concrete circular cylindrical tank walls containing oil products.

A computer program containing all the necessary procedures of design and analysis of such structures was carried out in this research.

Six types of liquids were adopted in the parametric study of this work (water, gas oil, Kuwait crude oil, North Sea crude oil, Basrah crude oil, and Kirk.uk crude oil) for the sake of comparing among these liquids.

Cylindrical concrete tank walls containing water needed larger values of hoop tension and shear stress resistance than those containing different types of oil products.

Consequently, the required ring steel reinforcement for tanks storing oil products is much less than water tanks.

For the moderate size tanks, the reinforcement for oil tank walls was in the range of 57-67 as a percent of water tank walls.

The specific weight of liquid has a major effect on the thickness of tank walls of similar volumes.

For instance, the wall thicknesses for water storage tanks were required to be between 1.9-3.9 times and 2.2-4.9 times the required thicknesses for gas oil and crude oil tanks respectively.

A.

significant advantage in oil product storage is that bottom (maximum) radial displacement is much less.

Water storage, for example, had up to 3.4 times the radial displacement of tanks with oil products. It was found, based on results of existing research that oil product storage losses per day depended on the coefficient of permeability and type of stored liquid.

For example, for moderate size tanks, the greatest loss was for gas oil storage.

This was about 18 times when compared with North Sea crude oil, the later being the product with the least losses because of its wax content. It is concluded that tanks containing crude oil are more successful and cost saving than the case with gas oil.

This is due to the smaller losses of crude oil compared with gas oil liquids.

Main Subjects

Civil Engineering

Topics

• Mechanical properties
• Reinforced concrete

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-306203