Mechanical Performance of Liquid-Applied Roof Waterproofing Systems
Publication: Journal of Performance of Constructed Facilities
Volume 27, Issue 3
Abstract
This study characterizes the mechanical performance of unreinforced and reinforced liquid-applied roof waterproofing systems (LARWS) based on several polymer types and links it to the pedestrian accessibility of roofs. The influence of the thickness and reinforcement on the system’s performance was assessed on free-film samples of cementitious, acrylic, liquid silicone, liquid rubber, and polyurethane-based systems. Tensile properties and resistance to dynamic and static indentation were determined. Further verification of fitness for intended use was assessed with watertightness and flexibility at low-temperature tests. The type of product was the most influential parameter on the mechanical performance of LARWS. The cementitious and the polyurethane-based systems had a much higher resistance to indentation than all the others, which were, at best, only fit for nonaccessible roofs. The use of internal reinforcement can improve the resistance to dynamic or static indentation. Using an extra coat of the product yields a higher resistance only to dynamic indentation. Deformability or stiffness could not be directly linked to a system’s resistance to indentation. A flexibility test at a low temperature () found that the mechanical performance of LARWS was not severely affected by those conditions.
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References
Al-Bahar, S. (2005). “Moisture effect on selected polymer-based membranes used for waterproofing building basements.” Poly. Compos., 26(3), 276–286.
Allenstein, P. (2007). “Global roofing trends going green: Cold-liquid-applied membranes offer earth-friendly product.” Interface, 25(9), 32–36.
Al-Zahrani, M. M., Al-Dulaijan, S. U., Ibrahim, M., Saricimen, H., and Sharif, F. M. (2002). “Effect of waterproofing coatings on steel reinforcement corrosion and physical properties of concrete.” Cement Concr. Compos., 24(1), 127–137.
ASTM. (2009). “Standard guide for use of high solids content, cold liquid-applied elastomeric waterproofing membrane with separate wearing course.” ASTM C898, West Conshohocken, PA.
ASTM. (2011). “Standard specification for high solids content, cold liquid-applied elastomeric waterproofing membrane for use with separate wearing course.” ASTM C836, West Conshohocken, PA.
Comité Européen de Normalisation (CEN). (1999a). “Flexible sheets for waterproofing—Part 1—Bitumen sheets for roof waterproofing—Determination of flexibility at low temperature.” EN 1109, Brussels, Belgium.
Comité Européen de Normalisation (CEN). (1999b). “Flexible sheets for waterproofing—Part 1—Bitumen sheets for roof waterproofing—Determination of tensile properties.” EN 12311-1, Brussels, Belgium.
Comité Européen de Normalisation (CEN). (2009). “Flexible sheets for waterproofing—Bitumen, plastic and rubber sheets for roof waterproofing—Determination of resistance to impact.” EN 12691, Brussels, Belgium.
D’Annunzio, J. A. (2000). “Liquid applied and cold applied roofing and waterproofing systems in the United States.” Proc., 11th Int. Waterproof. Roof. Congress, National Roofing Contractors Association, Rosemont, IL, 512–521.
Delgado, A. H., Mukhopadhyaya, P., Normandin, N., and Paroli, R. M. (2005). “Characteristics of membranes and insulations used for low-slope roofs.” IRC Building Science Insight 2005 Seminar Series, Institute for Research in Construction, National Research Council, Ottawa, Canada.
European Organization for Technical Approvals (EOTA). (2004a). “Determination of the resistance to dynamic indentation.” TR 006, Brussels, Belgium.
European Organization for Technical Approvals (EOTA). (2004b). “Determination of the resistance to static indentation.” TR 007, Brussels, Belgium.
European Organization for Technical Approvals (EOTA). (2004c). “Determination of the watertightness.” TR 003, Brussels, Belgium.
European Organization for Technical Approvals (EOTA). (2004d). “Guideline for European technical approval of liquid applied roof waterproofing kits.” ETAG 005, Brussels, Belgium.
Kirn, W. A. (2006). “Cool roof coatings to reduce energy demand and temperature in an urban environment.” Interface, 24(6), 23–30.
Kosednar, J., and Mailvaganam, N. P. (2005). “Selection and use of polymer-based materials in the repair of concrete structures.” J. Perform. Constr. Facil., 19(3), 229–233.
Leonard, J. (2007). “Reflective roof coatings retain their radiative properties.” Interface, 25(8), 15–18.
Litvan, G. G. (1996). “Waterproofing of parking garage structures with sealers and membranes: The Canadian experience.” Constr. Build. Mater., 10(1), 95–100.
Mailvaganam, N. P. (1996). “Elastomeric waterproofing membranes for parking garage decks.” Mater. Perform., 35(10), 24–29.
Mailvaganam, N. P., and Collins, P. (2000). “Factors affecting the proper installation of parking garage membranes.” Constr. Canada, 42(6), 11–14.
Mailvaganam, N. P., and Collins, P. (2004). “Workmanship factors influencing quality of installed parking garage waterproofing membranes.” J. Perform. Constr. Facil., 18(3), 121–126.
Mailvaganam, N. P., Collins, P. G., Lacasse, M. A., and Paroli, R. M. (1998). “The performance of elastomeric parking garage membrane systems.” Constr. Build. Mater., 12(6–7), 393–402.
Morgado, F., Lopes, J. G., de Brito, J. and Feiteira, J. (2012). “Portuguese irrigation canals: Lining solutions, anomalies and rehabilitation.” J. Perform. Constr. Facil., 26(4), 507–515.
Ohama, Y. (1995). Handbook of polymer-modified concrete and mortars: Properties and process technology, Noyes Publications, Park Ridge, NJ.
Ohama, Y. (1996). “Polymer-based materials for repair and improved durability: Japanese experience.” Constr. Build. Mater., 10(1), 77–82.
Information & Authors
Information
Published In
Journal of Performance of Constructed Facilities
Volume 27 • Issue 3 • June 2013
Pages: 244 - 251
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jun 11, 2011
Accepted: Nov 17, 2011
Published online: Nov 19, 2011
Published in print: Jun 1, 2013
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