Energy performance and thermal proprieties of three types of unfired clay bricks

Azhary, Karima El; Raefat, Saad; Laaroussi, Najma; Garoum, Mohammed

doi:10.1016/j.egypro.2018.07.059

Cited by 20 publications

(7 citation statements)

References 13 publications

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“…The thermal performance of the white categories' is lower than the red ones. This work agrees with the other studies 13 , 46 – 50 (Table 4 ) that demonstrated the decreasing thermal properties after fiber reinforcement.…”

Section: Resultssupporting

confidence: 93%

Physicochemical and thermomechanical performances study for Timahdite sheep wool fibers application in the building's insulation

Atbir

Taïbi

Aouan

et al. 2023

Sci Rep

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The present research focuses on the development and thermomechanical characterization of unfired solid bricks based on clay (white and red) and Timahdite sheep wool, which are local, durable, abundant, and economical materials. As this clay material is incorporated with sheep wool in the form of yarn multi-layers in opposite directions. It achieves good thermal and mechanical performance and a lightness of these bricks as acquired progress. This new method of reinforcement offers significant thermo-mechanical performance for the composite for thermal insulation in sustainable buildings. Several physicochemical analyses to characterize the raw materials were used. Thermomechanical measurements to characterize the elaborated materials. The wool yarn effect was significant on the mechanical behavior of the developed materials at 90 days, with flexural strength from 18 to 56% for the white clay. And 8–29% for the red one. Decrease in compressive strength from 9 to 36% for the white clay and 5–18% for the red one. These mechanical performances are accompanied by thermal conductivity gain ranging from 4 to 41% for the white and 6–39% for the red for wool fractions: 6–27 g. This green multi-layered bricks from abundant local materials with optimal thermo-mechanical properties, qualified for the intended use for thermal insulation and energy efficiency in the construction and development of local economies.

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Section: Resultssupporting

confidence: 93%

Physicochemical and thermomechanical performances study for Timahdite sheep wool fibers application in the building's insulation

Atbir

Taïbi

Aouan

et al. 2023

Sci Rep

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“…The results are summarised in Table 1. The obtained parameter values correspond to medium weight clay brick [22], however, a significantly higher thermal conductivity coefficient was recorded. A similar value of the coefficient was recorded in [23] by making measurements for the entire wall, both bricks and binder (mortar).…”

Section: Methodsmentioning

confidence: 71%

Thermal Fluxes and Solar Energy Storage in a Massive Brick Wall in Natural Conditions

Owczarek

2021

Energies

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The thermal state of building elements is a combination of steady and transient states. Changes in temperature and energy streams in the wall of the building in the transient state are particularly intense in its outer layer. The factors causing them are solar radiation, ambient temperature and long-wave radiation. Due to the greater variability of these factors during the summer, the importance of the transient state increases at this time. The study analysed heat transfer in three aspects, temperatures in the outer, middle and inner parts of the wall, heat fluxes between these layers and absorption of solar energy, heat transfer coefficient on the wall exterior was also calculated. The analysis is based on temperature measurements at several depths in the wall and measurements of solar radiation. The subject of research is a solid brick wall. The results show that the characteristics of heat flow in winter and summer for the local climate show distinct differences. In the winter, the maximum temperature difference between the external and internal surface of the wall was 10 °C and in summer, 20 °C. In the winter, the negative flux on the internal surface reached 10 W/m2 and on the external 40 W/m2 and was constant throughout the day. The mean heat transfer coefficient on the exterior surface for winter week was 8 W/(mK). A Nusselt and Biot number for dimensionless convection analysis was calculated. The research contributes to the calculation of the variability of heat or cold demand in a daily period and to learn about the processes of energy storage in the wall using sensible heat.

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“…Many types of research focused on finding alternative building materials that can provide more thermal insulation than traditional materials and have less harm to the environment or improve the thermal quality of the traditional building materials. In Morocco, three types of unfired brick were tested as a sustainable alternative to building materials with better thermal properties and low embodied energy [23,24]. Material embodied energy represents the energy used to manufacture and produce the material and the energy used to transport the material to construction sites.…”

Section: Walls System Construction In Iraqmentioning

confidence: 99%

A Practical Alternative Wall System to Promote Buildings Energy Efficiency: A Comparative Environmental Study

Alyasari¹,

Altaweel²,

Dhumad³

2023

IJSDP

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The development in science and technology in the building industry has proven that the use of traditional construction methods has become undesirable because of its adverse effects on the building itself in terms of weight and thermal performance, thus affecting the energy efficiency of the building. Reducing energy consumption is a high-priority issue at various societal and economic levels. Thermal performance is the extent to which the design of a building responds to the daily and seasonal changing in climatic conditions. Designing buildings that achieve thermal comfort in harmony with the external environment requires involving appropriate modern technologies. The present simulation-based research assesses thermal performances by testing different wall systems, which are Brick Wall (BW), Cellular Concrete Wall (CCW), Concrete Block Wall (CBW), and Izocrete Block Wall (IBW). The thermal performance of a wall system is characterized by its surface temperature when exposed to solar radiation. Preliminary results indicate that the new technology of wall systems plays a vital role in reducing temperature swings, which leads to reducing the internal temperature and thus promotes the building's energy efficiency. The IBW was found to be efficient and best during the test period, followed by CCW.

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Energy performance and thermal proprieties of three types of unfired clay bricks

Cited by 20 publications

References 13 publications

Physicochemical and thermomechanical performances study for Timahdite sheep wool fibers application in the building's insulation

Physicochemical and thermomechanical performances study for Timahdite sheep wool fibers application in the building's insulation

Thermal Fluxes and Solar Energy Storage in a Massive Brick Wall in Natural Conditions

A Practical Alternative Wall System to Promote Buildings Energy Efficiency: A Comparative Environmental Study

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