A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation of Masonry Chimney Materials for Venting Category-I Gas Appliances. Topical Report, June 1990-April 1993
The objective of the study was to evaluate the durability of masonry chimney materials when exposed to the wetter conditions imposed by the newer higher-efficiency, Category-I, fan-assisted gas appliances compared to the drier chimney conditions which have existed with conventional draft-hood-equipped appliances. An experimental study was performed with test specimens made of representative types of five different mortars and two clay tiles, using three spray chambers to simulate the expected conditions of temperature, wetness, and condensate acid levels for 12,000 wetting and drying cycles, including some freeze/thaw cycles, over a 16-month test period. The test results show that all of the chimney mortars and clay tiles tested for compressive strength withstood the wetter chimney conditions anticipated with the newer, mid-efficiency, Category-I gas appliances. The weaker mortars tended to gain strength during the exposure period, while the stronger mortars and the clay tiles tended to lose some strength. However, moisture migration through the masonry materials is expected to be worse under wetter conditions, and future chimney designs should consider ways to minimize water problems by using waterproof materials and by providing a drain.
Evaluation of Masonry Chimney Materials for Venting Category-I Gas Appliances. Topical Report, June 1990-April 1993
The objective of the study was to evaluate the durability of masonry chimney materials when exposed to the wetter conditions imposed by the newer higher-efficiency, Category-I, fan-assisted gas appliances compared to the drier chimney conditions which have existed with conventional draft-hood-equipped appliances. An experimental study was performed with test specimens made of representative types of five different mortars and two clay tiles, using three spray chambers to simulate the expected conditions of temperature, wetness, and condensate acid levels for 12,000 wetting and drying cycles, including some freeze/thaw cycles, over a 16-month test period. The test results show that all of the chimney mortars and clay tiles tested for compressive strength withstood the wetter chimney conditions anticipated with the newer, mid-efficiency, Category-I gas appliances. The weaker mortars tended to gain strength during the exposure period, while the stronger mortars and the clay tiles tended to lose some strength. However, moisture migration through the masonry materials is expected to be worse under wetter conditions, and future chimney designs should consider ways to minimize water problems by using waterproof materials and by providing a drain.
Evaluation of Masonry Chimney Materials for Venting Category-I Gas Appliances. Topical Report, June 1990-April 1993
S. G. Talbert (author) / B. Hindin (author) / P. Kumar (author)
1993
68 pages
Report
No indication
English
Construction Materials, Components, & Equipment , Architectural Design & Environmental Engineering , Materials Degradation & Fouling , Chimneys , Masonry , Durability , Corrosion , Weathering , Mortars(Materials) , Construction materials , Compressive strength , Venting , Clays , Condensates , Gas appliances
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