A new lightweight masonry block: Thermal and mechanical performance

• Autorzy: Sousa L. C. , Sousa H. , Castro C. F. , Antonio C. C. , Sousa R.

Identyfikatory

DOI

10.1016/j.acme.2013.08.003

• Języki publikacji: EN

Abstrakty

EN

The concerns with masonry building envelope performance, particularly thermal efficiency, are causing major changes in masonry solutions, mainly in south European countries, where traditionally the mild winter climate justified the use of high thermal masonry wall performance. The new European Directives regulations require different solutions. This paper describes the development a new masonry system, based on lightweight concrete units, intended for construction of large single leaf external walls without thermal insulation materials. A detailed analysis and optimization has been performed by FEM, under thermal point of view. This work was followed by a set of experimental tests in order to characterize the mechanical behavior of single units and masonry specimens. The concerns with productivity and ergonomics are also considered according their importance to the solution cost.

Słowa kluczowe

EN

large block systems; thermal performance; mechanical performance; experimental characterization

PL

wydajność cieplna; wydajność mechaniczna; beton; materiały termoizolacyjne

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2014
• Tom: Vol. 14, no. 1
• Strony: 160--169
• Opis fizyczny: Bibliogr. 23 poz., rys., tab., wykr.

Twórcy

autor

Sousa L. C.

• Department of Mechanical Engineering/IDMEC, Faculty of Engineering, University of Porto, Porto, Portugal
• Institute of Mechanical Engineering (IDMEC), University of Porto, Porto, Portugal

autor

Sousa H.

• DEC/GEQUALTEC, Faculty of Engineering, University of Porto, Porto, Portugal

autor

Castro C. F.

• Department of Mechanical Engineering/IDMEC, Faculty of Engineering, University of Porto, Porto, Portugal
• Institute of Mechanical Engineering (IDMEC), University of Porto, Porto, Portugal

autor

Antonio C. C.

• Department of Mechanical Engineering/IDMEC, Faculty of Engineering, University of Porto, Porto, Portugal
• Institute of Mechanical Engineering (IDMEC), University of Porto, Porto, Portugal

autor

Sousa R.

• GEQUALTEC, Faculty of Engineering, University of Porto, Porto, Portugal

Bibliografia

• [1] R. Veiga, F. Carvalho, H. Sousa, Experimental evaluation of water tightness of single leaf walls. In: Proceedings of the 12th International Brick/Block Masonry Conference, 2000.
• [2] S. Alves, H. Sousa, Paredes Exteriores de Edificios em Pano Simples, Lidel-Edicoes Tecnicas, Lda, Lisboa-Porto-Coimbra, 2003.
• [3] A. Tavil, Thermal behavior of masonry walls in Istanbul, Construction and Building Materials 18 (2) (2004) 111–118.
• [4] A.M. Bastos, H. Sousa, A. F. Melo, Methodology for the design of light weight concrete with expanded clay aggregates, Journal of Masonry Society 23 (1) (2005) 73–84.
• [5] K.S. Al-Jabri, A. W. Hago, A.S. Al-Nuaimi, A.H. Al-Saidy, Concrete blocks for thermal insulation in hot climate, Cement and Concrete Research 35 (8) (2005) 1472–1479.
• [6] J.J. Coz Diaz, P.J.C. Garcia Nieto, M.B. Betegon Biempica, Prendes Gero, Analysis and optimization of the heat- insulating light concrete hollow brick walls design by the finite element method, Applied Thermal Engineering 27 (8–9) (2007) 1445–1456.
• [7] B. Topcu, I.B. Isikdag, Manufacture of high heat conductivity resistant clay bricks containing perlite, Buildingand Environment 42 (2007) 3540–3546.
• [8] O. Unal, T. Uygunog˘lu, A. Yildiz, Investigation of properties of low-strength light weight concrete for thermal insulation, Building and Environment 42( 2007) 584–590.
• [9] O.A. Abdou, K.S. Murali, The effect of air cells and mortar joints on the thermal resistance of concrete masonry walls, Energy and Buildings 21 (2) (1994) 111–119.
• [10] M.P. Morales, M.C. Juarez, J. Domenech, Study of the geometry of a voided clay brick using rectangular perforations to optimize its thermal properties, Applied Thermal Engineering 31 (3) (2011) 11–12.
• [11] M.P. Morales, M.C. Juarez, P. Munoz, Influence of tongue and groove system on the thermal properties of large-format voided clay bricks for single-leaf walls, Construction and Building Materials 30 (5) (2012) 169–173.
• [12] D.E. Goldber, Genetic Algorithms in Search, Optimization and Machine Learning, Addison-Wesley, Reading, MA, 1989.
• [13] C.A.C. Antonio, A study on synergy of multiple cross over operators in a hierarchical genetic algorithm applied to structural optimization, Structural and Multidisciplinary Optimization 38 (2) (2009) 117–135.
• [14] L.C. Sousa, C.F. Castro, C.C. António, H. Sousa, Topology optimisation of masonry units from the thermal point of view using a genetic algorithm, Construction and Building Materials 25 (5) (2011) 2254–2262.
• [15] EN ISO10211: 2007, Thermal Bridge sin Building Construction – Heat Flow sand Surface Temperatures – Detailed Calculations, CEN TC89/WG1, Brussels, 2007.
• [16] EN 1745: 2002 E, Masonry and Masonry Products – Methods for Determining Design Thermal Values, CEN, Brussels, 2002.
• [17] RCCTE, Portugal – Leis, Decretos, etc. Regulamentodas Características de Comportamento Térmi code Edifícios, D.L. No. 80/2006 de 4 de Abril, 2006.
• [18] F.P. Incopera, D.P. Dewitt, Fundamentals of Heat Transfer, John Wiley & Sons, New York, 1981.
• [19] ABAQUS/CAE User's Manual, 2003.
• [20] EN 1996-1-1:2005 (Eurocode 6), Design of Masory Structures – Part1-1:General Rules for Reinforced and Unreinforced Masonry, CEN, Brussels, 2005.
• [21] EN 772-1:2011, Methods of Test for Masonry Units – Part 1: Determination of Compressive Strength, CEN, Brussels, 2011.
• [22] EN 1052-1:1998, Methods of Test for Masonry, Part1: Determination of Compressive Strength, CEN, Brussels, 1998.
• [23] EN 1998-1: 2004 (Ed.1), Eurocode 8: Design of Structures for Earthquake Resistance, Part1: General Rules, Seismic Actions and Rules for Buildings, CEN, Brussels, 2004.