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Jones, Dennis
Publications (6 of 6) Show all publications
Verbist, M., Nunes, L., Jones, D. & Branco, J. M. (2019). 11 - Service life design of timber structures. In: Bahman Ghiassi and Paulo B. Lourenço (Ed.), Long-term Performance and Durability of Masonry Structures: Degradation Mechanisms, Health Monitoring and Service Life Design (pp. 311-336). Elsevier
Open this publication in new window or tab >>11 - Service life design of timber structures
2019 (English)In: Long-term Performance and Durability of Masonry Structures: Degradation Mechanisms, Health Monitoring and Service Life Design / [ed] Bahman Ghiassi and Paulo B. Lourenço, Elsevier, 2019, p. 311-336Chapter in book (Refereed)
Abstract [en]

Wood has been widely used by humans for millennia as a construction material and can be easily found in everyday life, anywhere around the world. Since wood is a natural, sustainable, and organic composite material, it can be affected by several wood-deteriorating agents under suitable climate exposure conditions, which may threaten the long-term performance of timber structures in their service life. In that context, this chapter covers the background, guidelines, and current research that can help engineers and architects when designing timber structures. It provides extended knowledge about different wood-deteriorating agents, the natural durability of wood, and the use class concept. Based on this, durability models can be established, taking into account the potential presence over time of wood deterioration agents and allowing design for improved service life. Preventive measures and protection systems can be defined from the beginning, whereas on-site monitoring and maintenance of timber structures should be continuously performed.

Place, publisher, year, edition, pages
Elsevier, 2019
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-72751 (URN)10.1016/C2016-0-03710-5 (DOI)978-0-08-102110-1 (ISBN)
Available from: 2019-01-31 Created: 2019-01-31 Last updated: 2019-01-31Bibliographically approved
Jones, D. (2019). COST FP1303 “performance of bio-based building materials”. Paper presented at COST Action meeting, 6–7 September2017, Zagreb, Croatia. Wood Material Science & Engineering, 14(1)
Open this publication in new window or tab >>COST FP1303 “performance of bio-based building materials”
2019 (English)In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 14, no 1Article in journal, Editorial material (Refereed) Published
Place, publisher, year, edition, pages
Taylor & Francis, 2019
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-71689 (URN)10.1080/17480272.2018.1528569 (DOI)000451558500001 ()2-s2.0-85054573001 (Scopus ID)
Conference
COST Action meeting, 6–7 September2017, Zagreb, Croatia
Available from: 2018-11-21 Created: 2018-11-21 Last updated: 2019-02-27Bibliographically approved
Gaff, M., Kačík, F., Gašparík, M., Todaro, L., Jones, D., Corleto, R., . . . Čekovská, H. (2019). The effect of synthetic and natural fire-retardants on burning and chemical characteristics of thermally modified teak (Tectona grandis L. f.) wood. Construction and Building Materials, 200, 551-558
Open this publication in new window or tab >>The effect of synthetic and natural fire-retardants on burning and chemical characteristics of thermally modified teak (Tectona grandis L. f.) wood
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2019 (English)In: Construction and Building Materials, ISSN 0950-0618, E-ISSN 1879-0526, Vol. 200, p. 551-558Article in journal (Refereed) Published
Abstract [en]

This article deals with the effect of various temperatures of thermal modification and fire retardants on selected burning characteristics and chemical wood components of teak (Tectona grandis L. f.) wood. The thermal modification was carried out at temperatures 160 °C, 180 °C and 210 °C. Subsequently, thermally modified wood was treated by natural (arabinogalactan) and synthetic (ammonium phosphate) fire retardants. The effect of thermal modification as well as fire retardant was detected by burning characteristics such as weight loss, burning rate, maximum burning rate, ratio of the maximum burning rate and time to reach maximum burning rate. The chemical changes caused by the influence of these factors were determined by changing the content of cellulose, hemicelluloses, holocellulose, lignin and extractives. The relationship between burning characteristics and chemical changes in the thermally modified wood was analyzed using Spearman’s correlation. The results showed that the thermal modification of teak wood had a negative effect on its ignition and burning properties. Synthetic fire retardant had the highest retardation effect in all cases. The natural fire retardant caused a better retardation effect on thermally modified wood at temperature 180 and 210 °C. The relative content of lignin, extractives and cellulose increased, while the amount of holocellulose and particularly hemicelluloses decreased.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Teak, Burning characteristics, Thermal modification, Chemical components, Fire retardant
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-72828 (URN)10.1016/j.conbuildmat.2018.12.106 (DOI)000458942400052 ()2-s2.0-85059173635 (Scopus ID)
Note

Validerad;2019;Nivå 2;2019-02-08 (johcin)

Available from: 2019-02-08 Created: 2019-02-08 Last updated: 2019-03-11Bibliographically approved
Ugovšek, A., Šubic, B., Starman, J., Rep, G., Humar, M., Lesar, B., . . . Lozano, J. I. (2018). Short-term performance of wooden windows and facade elements made of thermally modified and non-modified Norway spruce in different natural environments. Paper presented at COST FP1303 Final meeting - Building with Bio-Based Materials: Best Practice and Performance Specification;6-7 September 2017;Faculty of Forestry, University of Zagreb, Zagreb, Croatia. Wood Material Science & Engineering, 14(1), 42-47
Open this publication in new window or tab >>Short-term performance of wooden windows and facade elements made of thermally modified and non-modified Norway spruce in different natural environments
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2018 (English)In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 14, no 1, p. 42-47Article in journal (Refereed) Published
Abstract [en]

Thermally modified wood is becoming an increasingly popular material for different applications in buildings. Laboratory tests indicated a positive effect of thermal modification on durability, dimensional stability and thermal conductivity of wood. Therefore, windows and facade elements made of thermally modified Norway spruce and non-modified Norway spruce were tested in the field and installed in different test objects which were exposed at five locations in Europe (Slovenia, Germany, Sweden, and Spain). Results from monitoring showed that elements and windows made of thermally modified spruce (TMS) had considerably lower wood moisture content compared to the ones made of non-modified spruce and that wax further positively influenced moisture performance. Colour changes of TMS were more intensive compared to non-modified spruce but were successfully retarded by adding pigments to the wax. Mould and stain growth was largely dependent on the location, amount of precipitation and relative humidity.

Place, publisher, year, edition, pages
Taylor & Francis, 2018
Keywords
Norway spruce, thermal modification, wax, wooden facades, wooden windows
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-70188 (URN)10.1080/17480272.2018.1494627 (DOI)000451558500006 ()2-s2.0-85049625839 (Scopus ID)
Conference
COST FP1303 Final meeting - Building with Bio-Based Materials: Best Practice and Performance Specification;6-7 September 2017;Faculty of Forestry, University of Zagreb, Zagreb, Croatia
Note

Konferensartikel i tidskrift

Available from: 2018-08-01 Created: 2018-08-01 Last updated: 2019-02-13Bibliographically approved
Sandberg, D. & Jones, D. (2018). Wood modification ‒ different processes and their use in Europe.. In: Németh R, Teischinger A, Rademacher P, Bak M. (Ed.), Proceedings of the 8th hardwood conference with special focus on "new aspects on hardwood utilization - from science to technology": . Paper presented at 8th Hardwood Conference on New Aspects of Hardwood Utilization - From Science To Technology,OCT 25-26, 2018, Sopron, HUNGARY (pp. 12-13). Sopron
Open this publication in new window or tab >>Wood modification ‒ different processes and their use in Europe.
2018 (English)In: Proceedings of the 8th hardwood conference with special focus on "new aspects on hardwood utilization - from science to technology" / [ed] Németh R, Teischinger A, Rademacher P, Bak M., Sopron, 2018, p. 12-13Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Nowadays, wood modification is referred to as a process used to improve the physical, mechanical, or aesthetic properties of sawn timber, veneer or wood particles used in the production of wood composites. Though many aspects of these treatments are known, the fundamental influence of the process on product performance, the environment, and end of life scenarios remain relatively unknown. It is essential to integrate interactive assessment of process parameters, developed product properties, and environmental impacts. To optimize modification processing to minimize environmental impacts, much more information must be gathered about all process related factors affecting the environment. Wood modification represents an assortment of innovative processes currently being adopted in the wood protection sector or are at different stage of development (Fig. 1). These processes produces a material that can be disposed at the end of a product's life cycle without presenting any environmental hazards greater than those that are associated with the disposal of unmodified wood. 

Place, publisher, year, edition, pages
Sopron: , 2018
National Category
Wood Science Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-71301 (URN)000474688100003 ()978-963-359-096-6 (ISBN)
Conference
8th Hardwood Conference on New Aspects of Hardwood Utilization - From Science To Technology,OCT 25-26, 2018, Sopron, HUNGARY
Available from: 2018-10-22 Created: 2018-10-22 Last updated: 2019-08-16Bibliographically approved
(2017). Performance of Bio-Based Building Materials. Woodhead Publishing Limited
Open this publication in new window or tab >>Performance of Bio-Based Building Materials
2017 (English)Book (Other academic)
Abstract [en]

Performance of Bio-based Building Materials provides guidance on the use of bio-based building materials (BBBM) with respect to their performance. The book focuses on BBBM currently present on the European market. The state-of-the-art is presented regarding material properties, recommended uses, performance expectancies, testing methodology, and related standards.

Chapters cover both ‘old and traditional’ BBBM since quite a few of them are experiencing a comeback on the market. Promising developments that could become commercial in the near future are presented as well.

The book will be a valuable reference resource for those working in the bio-based materials research community, architects and agencies dealing with sustainable construction, and graduate students in civil engineering.

Place, publisher, year, edition, pages
Woodhead Publishing Limited, 2017. p. 650
National Category
Wood Science Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-70692 (URN)10.1016/C2015-0-04364-7 (DOI)978-0-08-100982-6 (ISBN)
Available from: 2018-08-31 Created: 2018-08-31 Last updated: 2018-09-05Bibliographically approved
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