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Concrete slab on the ground and moisture control : verification of some methods to improve the moisture conditions in the foundation

Harderup, Lars-Erik LU (1991) In Report TVBH 1005.
Abstract
This work deals with different types of repair methods for concrete slab on the ground damaged by moisture. Many of the available methods involve some kind of mechanical ventilation of the foundation. The basic principle for all these systems is the same. By establishing air movement through an air-permeable layer below or above the concrete slab, the flowing air can absorb moisture from surrounding materials. When the air has passed through the layer, it is transported out, and away from, the foundation. Three methods of this type have been examined by extensive field rneasurements in a few buildings.



Improved drainage system constitute another type of repair method frequently used for Concrete slabs in the ground with... (More)
This work deals with different types of repair methods for concrete slab on the ground damaged by moisture. Many of the available methods involve some kind of mechanical ventilation of the foundation. The basic principle for all these systems is the same. By establishing air movement through an air-permeable layer below or above the concrete slab, the flowing air can absorb moisture from surrounding materials. When the air has passed through the layer, it is transported out, and away from, the foundation. Three methods of this type have been examined by extensive field rneasurements in a few buildings.



Improved drainage system constitute another type of repair method frequently used for Concrete slabs in the ground with moisture problems originating from the ground. A system of this type was

investigated in a building for two years . The joint water levels close to the drain pipes and below the building were measured every four hours.



Three transient numerical models are presented in the report. All the models can be used to predict temperatures in different parts of mechanically-ventilated foundations. One of the models can also be used to predict moisture conditions in mechanically ventilated foundations.



Superposition and scaling were applied in order to demonstrate a method of determining the temperature-distribution in a ventilated layer on the basis of diagrams and simple manual calculations. (Less)
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author
opponent
  • unknown], [unknown
organization
publishing date
type
Thesis
publication status
published
subject
keywords
Concrete slab, moisture, repair methods, ventilated foundation, drainage, numerical methods, grunder, grundplattor, platta på mark, betongplattor, fuktskador, reparationsmetoder, dränering, ventilerade konstruktioner, fukt, fukttransport, relativ fuktighet, temperatur, luftflöden, beräkningsmodeller, teori, fältundersökningar, mätresultat
in
Report TVBH
volume
1005
pages
174 pages
publisher
Byggnadsfysik LTH, Lunds Tekniska Högskola
defense location
Sektionen för väg- och vattenbyggnad, John Ericssons väg 1, Hörsal V:A, Tekniska fakulteten vid Lunds universitet
defense date
1991-05-22 13:15
external identifiers
  • other:TVBH-1005
ISSN
0349-4950
ISBN
91-628-0295-X
language
English
LU publication?
yes
id
28ab849b-bf2d-4b53-b06a-c22f64b49623 (old id 8056150)
date added to LUP
2015-10-14 16:06:18
date last changed
2016-09-19 08:44:58
@phdthesis{28ab849b-bf2d-4b53-b06a-c22f64b49623,
  abstract     = {This work deals with different types of repair methods for concrete slab on the ground damaged by moisture. Many of the available methods involve some kind of mechanical ventilation of the foundation. The basic principle for all these systems is the same. By establishing air movement through an air-permeable layer below or above the concrete slab, the flowing air can absorb moisture from surrounding materials. When the air has passed through the layer, it is transported out, and away from, the foundation. Three methods of this type have been examined by extensive field rneasurements in a few buildings.<br/><br>
<br/><br>
Improved drainage system constitute another type of repair method frequently used for Concrete slabs in the ground with moisture problems originating from the ground. A system of this type was<br/><br>
investigated in a building for two years . The joint water levels close to the drain pipes and below the building were measured every four hours.<br/><br>
<br/><br>
Three transient numerical models are presented in the report. All the models can be used to predict temperatures in different parts of mechanically-ventilated foundations. One of the models can also be used to predict moisture conditions in mechanically ventilated foundations.<br/><br>
<br/><br>
Superposition and scaling were applied in order to demonstrate a method of determining the temperature-distribution in a ventilated layer on the basis of diagrams and simple manual calculations.},
  author       = {Harderup, Lars-Erik},
  isbn         = {91-628-0295-X},
  issn         = {0349-4950},
  keyword      = {Concrete slab,moisture,repair methods,ventilated foundation,drainage,numerical methods,grunder,grundplattor,platta på mark,betongplattor,fuktskador,reparationsmetoder,dränering,ventilerade konstruktioner,fukt,fukttransport,relativ fuktighet,temperatur,luftflöden,beräkningsmodeller,teori,fältundersökningar,mätresultat},
  language     = {eng},
  pages        = {174},
  publisher    = {Byggnadsfysik LTH, Lunds Tekniska Högskola},
  school       = {Lund University},
  series       = {Report TVBH},
  title        = {Concrete slab on the ground and moisture control : verification of some methods to improve the moisture conditions in the foundation},
  volume       = {1005},
  year         = {1991},
}