Name: LUÍS GUSTAVO FIORESE VINCO
Type: MSc dissertation
Publication date: 29/08/2017
Advisor:
Name |
Role |
|---|---|
| GEILMA LIMA VIEIRA | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| GEILMA LIMA VIEIRA | Advisor * |
| PATRÍCIO JOSÉ MOREIRA PIRES | Internal Examiner * |
Summary: The use of Portland cement mortars for the production of roof and wall coverings is a reality in civil works in Brazil. Among the production stages of the mortar coating, the surface finishing, is considered as an empirical procedure, WHERE the mason officer presses the surface of the mortars with the fingers of the hands to define in which moment (resistance), after Application of the mortar under the substrate, the shear should be applied with the leveling ruler. This procedure, because it is totally empirical, lacks a quality control system so that execution failures and pathological manifestations at this stage are less recurrent. Thus, this work aims to evaluate the moisture behavior of the mortars applied to the substrate and the evolution of the resistance of the coating mortars in the fresh state based on surface measurements of shear strength with the aid of the Vane Shear Test, (CPII-Z-32 and CPIII-40-RS), two types of substrates (ceramic block and concrete block), with and without the application of slab and two traces commonly used on site, 1: 1 : 6 and 1: 2: 9 (cement: cal: sand). The tests allowed to evaluate that the evolution of the Surface Resistance to Shear (RSC) for ceramic blocks is 4.45 times larger than the concrete block. Mortars produced with CPII-Z-32 cement generate approximately 30% greater growth when compared to mortars produced with CPIII-40-RS. However, the substrates with slabs and 1: 1: 6 traces (cement: lime: sand) generate a 15% increase in CRS when compared to the non-plated base and the 1: 2: 9 traces (cement: lime: sand) , Respectively.
Keywords: Rendering mortar; Surface Resistance to Shear (RSC); Vane Shear Test.
