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Leaking roofs in Tunisia

Johansson, Erik LU and Kalantari, Farhad (1989) In Report TVBM 3039.
Abstract
Summary

The leaking of water through roofs is a major problem in many parts of Tunisia. As a part of a collaboration between "École N: ionale d'Ingénieurs de Tunis" (E.N.I.T.) and Lund University, Institute of Science and Technology (L.N.T.H.), Sweden, a measuring method has been developed to compare the watertightness of different roofing membranes. With the method, three roof structues with different types of bituminous membranes were tested.



The measuring equipment consists of a plastic tube containing a concrete slab covered with a roofing membrane. The diameter of the tube is 30 cm and the height is 8 cm. The joint between the specimen and the tube is tightened and water is poured on top of the specimen in... (More)
Summary

The leaking of water through roofs is a major problem in many parts of Tunisia. As a part of a collaboration between "École N: ionale d'Ingénieurs de Tunis" (E.N.I.T.) and Lund University, Institute of Science and Technology (L.N.T.H.), Sweden, a measuring method has been developed to compare the watertightness of different roofing membranes. With the method, three roof structues with different types of bituminous membranes were tested.



The measuring equipment consists of a plastic tube containing a concrete slab covered with a roofing membrane. The diameter of the tube is 30 cm and the height is 8 cm. The joint between the specimen and the tube is tightened and water is poured on top of the specimen in order to estimate the flow of water that penetrates the membrane and the slab. The tube with its specimen rests on a plastic bowl containing a bed of a wet salt with a low and well defined relative humidity. Thus, all specimens are exposed

to the same type of climate and the penetration will be greatþ promoted by the big difference between the humidity above the membrane (liquid water) and below the concrete slab. The results obtained after 1000 hours of measuring were plotted in diagrams showing how much water that had run through the specimens at a certain time.



The measuring method has been analysed and it has been proposed how to use the method to make it possible to calculate a quantitative value of the watertightness. Finally, an economic analysis was made in order to compare the costs of making the three roof structures. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Book/Report
publication status
published
subject
keywords
water, roofs, economic analysis, Tunisia
in
Report TVBM
volume
3039
pages
14 pages
publisher
Division of Building Materials, LTH, Lund University
external identifiers
  • other:TVBM-3039
ISSN
0348-7911
language
English
LU publication?
yes
id
48b8eebb-ec83-4526-85be-f99236a166e1 (old id 1290503)
date added to LUP
2009-02-03 16:48:25
date last changed
2016-04-16 04:56:09
@techreport{48b8eebb-ec83-4526-85be-f99236a166e1,
  abstract     = {Summary<br/><br>
The leaking of water through roofs is a major problem in many parts of Tunisia. As a part of a collaboration between "École N: ionale d'Ingénieurs de Tunis" (E.N.I.T.) and Lund University, Institute of Science and Technology (L.N.T.H.), Sweden, a measuring method has been developed to compare the watertightness of different roofing membranes. With the method, three roof structues with different types of bituminous membranes were tested.<br/><br>
<br/><br>
The measuring equipment consists of a plastic tube containing a concrete slab covered with a roofing membrane. The diameter of the tube is 30 cm and the height is 8 cm. The joint between the specimen and the tube is tightened and water is poured on top of the specimen in order to estimate the flow of water that penetrates the membrane and the slab. The tube with its specimen rests on a plastic bowl containing a bed of a wet salt with a low and well defined relative humidity. Thus, all specimens are exposed<br/><br>
to the same type of climate and the penetration will be greatþ promoted by the big difference between the humidity above the membrane (liquid water) and below the concrete slab. The results obtained after 1000 hours of measuring were plotted in diagrams showing how much water that had run through the specimens at a certain time.<br/><br>
<br/><br>
The measuring method has been analysed and it has been proposed how to use the method to make it possible to calculate a quantitative value of the watertightness. Finally, an economic analysis was made in order to compare the costs of making the three roof structures.},
  author       = {Johansson, Erik and Kalantari, Farhad},
  institution  = {Division of Building Materials, LTH, Lund University},
  issn         = {0348-7911},
  keyword      = {water,roofs,economic analysis,Tunisia},
  language     = {eng},
  pages        = {14},
  series       = {Report TVBM},
  title        = {Leaking roofs in Tunisia},
  volume       = {3039},
  year         = {1989},
}