Properties of self compacting concrete exposed to oil products

Dissertant

Swaidawi, Ali Adil Ali Ali

Thesis advisor

Khalil, Wasan Ismail
al-Mishhadani, Shakir A.

University

University of Technology

Faculty

-

Department

Department of Building and Construction Engineering

University Country

Iraq

Degree

Master

Degree Date

2013

English Abstract

Oil products have been stored or transported successfully by steel tanks.

However as a result of the steel corrosion and high maintenance costs, engineering investigation have started to study other alternatives.

One of these alternatives is the use of concrete tanks for oil products storage.

Self Compacted Concrete (SCC) is a new generation of concrete.

Its behavior after the exposure to oil products is still unknown.

that after soaking period of 180 days in crude oil, motor oil, fuel oil and gas oil the reduction in l^PV is 11.15%,13.04%, 11.72% and 10.01%, while the reduction in dynamic modulus of elasticity is 23.63%, 26.9%, 24.55% and 22.1% respectively.

Self compacted concrete specimens exposed to wetting and drying cycles in crude oil and gas oil show increase in mechanical and dynamic properties till five exposure cycles in comparison with the reference specimen (not exposed to cycles).

A^er six cycles of exposure (180 days) in crude oil and gas oil these properties decrease in comparison with the reference.

The reduction in compressive strength, splitting tensile strength, modulus of rapture, static modulus of elasticity, UPV and dynamic modulus of elasticity after six cycles of exposure (180 days) in crude oil are 13.92%, 19.09%, 9.34% , 13.88% , 6.18% and 12.54 %,while the reduction for SCC exposed to six cycles in gas oil were 5.26%, 9.27%, 1.09%, 4.36%, 2.79% and 5.79 respectively.

Generally the results indicate that the mechanical and dynamic properties of SCC subjected to wetting and drying cycles in motor and fuel oil are enhanced in comparison with the reference.

The aim of this investigation is to study the effect of continuous or wetting and drying cycles exposure to water or different oil products (crude oil, gas oil, motor oil and fuel oil) on the mechanical properties (compressive strength, splitting tensile strength, modulus of rupture, static modulus of elasticity) and dynamic properties (ultrasonic pulse velocity, dynamic modulus of elasticity) ,length change, total absorption and density of SCC after different exposure periods (28 ,60 , 90 , 120, 150and 180) for continuous exposure and different number of wetting and drying cycle (1,2,3,4 and 5 cycles) for wetting and drying cycles exposure.

Each exposure cycle includes one month immersion in water or different oil product and then ten days drying.

The test results for SCC continuously immersed in water indicate that the mechanical and dynamic properties are enhanced as the exposure period increased.

The mechanical and dynamic properties of SCC continuously exposed to oil products are adversely affected.

After socking period of 180 days in crude oil, motor oil, fuel oil and gas oil the reduction in compressive strength is 27.93%, 40.74%, 37.69% and 23.81%, while the reduction in splitting tensile strength is 27.77%, 32.51%, 30.88% , and 25.65% respectively .The reduction in modulus of rapture is 24.01%, 25.98% , 24.67% and 21.92%, while the reduction in static modulus of elasticity is 29.53%, 42.33%,39.45% and 26.7% for SCC continuously exposed to crude oil, , motor oil fuel oil and gas oil respectively in comparison with reference (exposed to water at same exposure period).

The results also show

Main Subjects

Engineering & Technology Sciences (Multidisciplinary)

Topics

• Concrete

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-417364