An experimental study to the design of pressure inside fire-resistant concrete

Dissertant

Mahmud, Ali Sad

Thesis advisor

Hasan, Shakir Sakran
Gross, Ulrich

University

University of Technology

Faculty

Department of Mechanics and Equipments Engineering

University Country

Iraq

Degree

Master

Degree Date

2013

English Abstract

The developing steam-pressure inside fire-resistant concrete during first heating can exceed the strength of concrete and cause an explosive spalling.

A technique for an experimental device was designed and used in this research for more understanding to the behavior of the pore-pressure-sensor under various conditions.

This technique is able to measure the real amount of pore-pressure and able to compare and calibrate the pore-pressure sensors.

Tn addition, a control program was designed for recording and measurement computerized for the obtained results.

Various studies have been carried-out on fire resistance concrete specimens by this technique, the specimens have different diameters (3.6, 4.3, 5.1, 6.6, 7 and 8.5 cm) and heights (5 and 7 cm), with a pressure and temperature up to 3 bar and 120 °c respectively.

The results showed that the type and the volume of the fluid filling the space inside the tube-pressure-sensor have a highly influence on its response.

Tn which, by the use of water instead of air as a fluid filling this space, the time delay was reduce by (75 %), also by reducing the space volume, a reduction of (67 %) in the time delay is achieved.

Tn addition, the leakage between the tube and the concrete that initiated by shrinkage cracks have a high influence and cause a big error in the measurement.

Main Subjects

Engineering & Technology Sciences (Multidisciplinary)

Topics

• Temperatures
• Reinforced concrete

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-417493