Computational assessment of thermal performance of contemporary ceramic blocks with complex internal geometry in building envelopes

Recycling of Mining Waste in the Production of Masonry Units

“…In recent decades, the brick industry has evolved continuously, producing a wide range of masonry units (solid and perforated bricks, blocks with vertical or horizontal cavities) [23,24], whose thermal characteristics have been improved to meet the thermal requirements imposed by norms. As can be seen in the scientific literature, the thermal properties of bricks was optimized by increasing the volume of cavities, by changing the cavity geometry or the profile of exterior surface [26][27][28][29], and by filling the cavities with different thermal insulation materials [30][31][32][33][34]. Another solution studied and adopted for ceramic product optimization in terms of embodied energy or thermal performance was the incorporation in the clay matrix, organic or inorganic waste [35,36], resulted from different activities.…”

Dynamic thermal behaviour characterization of integrated insulation clay hollow blocks for buildings energy simulations applications

“…Integrated insulation clay hollow blocks have a complex geometry with 2 different materials: clay and mineral wool along high thickness (from 30 to 42.5 cm here) (see Figure 1) with integrated thermal bridges. The equivalent thermal conductivity λ eq (or thermal resistance R in m².K.W -1 ) is often well known [3][4][5][6][7][8][9][10][11][12][13] or well compiled [1] for energetic calculations. However, the equivalent density ρ eq and mainly heat capacity c peq are poorly assessed or are assessed by simplified methods [14][15][16][17][18] although some authors note the difficulty of modelling 2D or 3D blocks in 1D because of their complex design [7].…”

“…However, the equivalent density ρ eq and mainly heat capacity c peq are poorly assessed or are assessed by simplified methods [14][15][16][17][18] although some authors note the difficulty of modelling 2D or 3D blocks in 1D because of their complex design [7]. Many authors only work on hollow clay blocks but the majority of them investigates only the steady state behaviour (λ eq ) [3][4][5][6][7][8][9][10][11][12][13]. Some authors have worked on their dynamic thermal behaviour [14,16,[19][20][21][22][23][24] without quantifying the equivalent density and heat capacity but by investigating others transient indicators (time-lag, phase shifting, block response time, heat-flux decrement factor).…”