Improving the thermal transmittance of single-brick walls built of clay bricks lightened with paper pulp

  1. Muñoz, P. 1
  2. Juárez, M.C. 1
  3. Morales, M.P. 2
  4. Mendívil, M.A. 1
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 Universidad Autónoma de Chile
    info

    Universidad Autónoma de Chile

    Temuco, Chile

    ROR https://ror.org/010r9dy59

Revue:
Energy and Buildings

ISSN: 0378-7788

Année de publication: 2013

Volumen: 59

Pages: 171-180

Type: Article

DOI: 10.1016/J.ENBUILD.2012.12.022 SCOPUS: 2-s2.0-84873804476 WoS: WOS:000317449000018 GOOGLE SCHOLAR

D'autres publications dans: Energy and Buildings

Objectifs de Développement Durable

Résumé

One of the most important factors in the thermal behavior of exterior walls is the thermal conductivity of the clay in their bricks. The higher the percentage of lightening additives incorporated, the better the thermal behavior of the bricks. But as their thermal characteristics are improved the mechanical properties of bricks deteriorate. The goal is to study the influence of paper pulp as a lightening additive on the thermal and mechanical properties of the fired clay, and to improve the thermal properties as far as possible without the mechanical properties falling below the required levels. This involved the preparation of test specimens that were then subjected to the corresponding assays of thermal conductivity and mechanical strength. It is found that around 15% of paper pulp can be added without the brick's mechanical properties ceasing to comply with current legislation. This amount of paper pulp has improved conductivity properties by 39.69% compared to the clay without additives, recording a minimum conductivity value at 10 °C of 0.45 W/m-K. This decrease in the conductivity of the clay results in a 16% improvement in equivalent thermal transmittance for brick walls made in the same way. © 2013 Elsevier B.V.