Physical-mechanical performance criteria of cement-soil mortars for earth building coating

Autores

  • Ana Paula da Silva Milani UFMS
  • Flávia Gaspar Rangel Dias Universidade Federal de Mato Grosso do Sul - UFMS 79070-900, Campo Grande, MS

Palavras-chave:

hydrated lime, air entraining agent, bonding, workability, shrinkage

Resumo

Soil as a mortar aggregate may improve the physical-mechanical compatibility between the coating system and earth-wall substrate, as well as present greater durability when stabilised with cement. Based on these concepts, the physical-mechanical behaviour of mortars comprising soil, cement, lime and admixture was analysed to be used as coating for earth constructions. Cement-soil mortars using the ratio of sandy soil equal to or less than 1:6 in the cement:soil dosage shows a potential for an application as earth wall coating. However, to improve its workability in the fresh state, it is necessary to add hydrated lime or chemical admixture at a limited proportion so it does not damage the physical performance of the mortar. To qualify the cement-soil mortars for earth building coating, the minimum requirements for volumetric shrinkage, tensile bond strength and compressive strength must be met simultaneously and the following criteria are indicated: minimum compressive strength of 4 MPa; zero volumetric shrinkage index and minimum tensile bond strength of 0.20 MPa.

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Biografia do Autor

Ana Paula da Silva Milani, UFMS

Coordenadora da Pós-graduação em Eficiência Energética e Sustentabilidade da Faculdade de Engenharias, Arquitetura e Urbanismo e Geografia - FAENG/UFMS

Flávia Gaspar Rangel Dias, Universidade Federal de Mato Grosso do Sul - UFMS 79070-900, Campo Grande, MS

Graduada em Engenharia Civil na Faculdade de Engenharias, Arquitetura e Urbanismo e Geografia - FAENG/UFMS

Publicado

06.06.2018

Como Citar

MILANI, A. P. da S.; DIAS, F. G. R. Physical-mechanical performance criteria of cement-soil mortars for earth building coating. Ambiente Construído, [S. l.], v. 18, n. 2, p. 133–142, 2018. Disponível em: https://seer.ufrgs.br/index.php/ambienteconstruido/article/view/72000. Acesso em: 28 mar. 2024.