Produção Nacional
Influence of the Blocks and Mortar’s Compressive Strength on the Flexural Bond Strength of Concrete Masonry
2018; Springer International Publishing; Linguagem: Inglês
10.1007/978-3-319-72484-3_60
ISSN2367-1181
AutoresGustavo Henrique Nalon, Rita de Cássia S. S. Alvarenga, Leonardo Gonçalves Pedroti, Marcelo Arruda Alves, Roseli Oliveira Guedes Martins, Carol Ferreira Rezende Santos, Igor Klaus Rocha Andrade, Beatryz Cardoso Mendes,
Tópico(s)Concrete and Cement Materials Research
ResumoThis work presents an experimental investigation of the influence of concrete blocks and mortar’s compressive strength on the flexural bond strengthFlexural Bond Strength , normal to the bed joints, of concrete structural masonry. Third-point beam tests were performed on concrete prisms, considering two different kinds of concrete blocks (compressive strength of 5.9 and 8.2 MPa) and six different cement-lime mortar compositions (compressive strength around 30, 70, and 120% of the blocks’ net area compressive strength). Units’ absorption and mortar’s initial flow and water retentivity were not varied, but remained within the suitable range for use in structural masonry. For both types of concrete blocks, it was observed an increase on the prism’s flexural bond strengthFlexural Bond Strength with the increase of the mortars’ compressive strength. A lower mortar’s water-cement ratio led to higher bond strength. When fixing the ratio between mortar’s and concrete block’s compressive strength, it was noticed that the increase on the blocks’ strength contributed to a slight increase on the masonry’s flexural bond strengthFlexural Bond Strength , except when using high strength mortar, in which the increase was significantly greater.
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