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- Niklewski, Jonas, et al.
(författare)
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Strengthened clay brick and lightweight aggregate concrete block walls tested under eccentric axial loading – a feasibility study on different strengthening techniques
- 2020
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Ingår i: Brick and Block Masonry - From Historical to Sustainable Masonry : Proceedings of the 17th International Brick and Block Masonry Conference - Proceedings of the 17th International Brick and Block Masonry Conference. - : CRC Press. - 9780367565862 - 9781003098508 ; , s. 987-993
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Konferensbidrag (refereegranskat)abstract
- Strengthening of masonry walls is a means to improve the energy performance of modern external masonry walls without further increasing their total thickness. The present paper evaluates the feasibility - here refer-ring to ease-of-application and structural performance - of several techniques aimed at strengthening mason-ry walls subjected to eccentric axial loading. Four full scale walls made of solid clay bricks and lightweight aggregate concrete blocks were strengthened using externally bonded reinforcement of conventional steel mesh, high-strength steel wire, masonry reinforcement and mechanically fastened strips of steel sheet. Each of the studied strengthening techniques is feasible from a structural perspective. Mechanically fastened steel strips require the least work, and no render is required since the steel is not exposed to fire. Steel mesh can be applied directly on the wall surface, which lowers the thickness of the render layer. Continued research with more replicates will confirm the presented conclusions.
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| 2. |
- Shahreza, S.k., et al.
(författare)
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Making decision on repointing of clay brick facades on the basis of moisture content and water absorption tests results – a review of assessment methods
- 2020
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Ingår i: Brick and Block Masonry - From Historical to Sustainable Masonry : Proceedings of the 17th International Brick/Block Masonry Conference (17thIB2MaC 2020), July 5-8, 2020, Kraków, Poland - Proceedings of the 17th International Brick/Block Masonry Conference (17thIB2MaC 2020), July 5-8, 2020, Kraków, Poland. - : CRC Press. - 9781003098508 ; , s. 617-623
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Konferensbidrag (refereegranskat)abstract
- Use of clay brick masonry in façades is often motivated by its aesthetic values and durability. Yet, mortar joints exposed to climate agents erode over time, expected to cause elevated moisture content and water absorption. Thus, it is often recommended that 40- to 50-year-old facades should be repointed – a measure which is intrusive and costly. Decision is in many cases taken without a clear evidence that repointing will diminish water absorption and moisture content in the renovated walls. This paper presents the results of a state-of-the-art study on field and laboratory methods to measure moisture content and water absorption in clay brick masonry. For common buildings, use of low cost and time efficient measurement methods is feasible. However, prior to measurements, analysis of technical and climate data combined with a visual inspection might give a rational basis for decision on repointing or other alternative maintenance measures.
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