Banca de DEFESA: DEIZE DAIANE PINTO GUILHERME

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : DEIZE DAIANE PINTO GUILHERME
DATE: 09/12/2019
TIME: 08:30
LOCAL: Auditório do CTEC
TITLE:

STUDY OF THERMAL AND MECHANICAL PERFORMANCE IN COATING MORTARS WITH REPLACEMENT OF NATURAL AGGREGATE BY EXPANDED VERMICULITE.

KEY WORDS:

Thermal mortar, thermal insulation, characterization.

PAGES: 86
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

The interest of the thermal performance of buildings is increasingly frequent due to user requirements and improvements in the supervision of the performance standard NBR 15575 (ANBT, 2013), which establishes the minimum efficiency criteria of a building. We highlight the charges related to thermal behavior, because they impact on the construction, the environment and affect the comfort and costs of users. An alternative to solve this problem is to change the constituent materials of the building systems, such as the use of lightweight aggregates with thermal insulation potential. In this context, the objective of the present work is to analyze the thermal and mechanical performance of natural mortar with expanded vermiculite. The experimental procedure began with the characterization of the materials and the production of the mortars with the trace volume 1: 1: 6 (cement: lime: sand) with replacements of 25, 30, 35, 40, 45 and 50% of the sand by vermiculite. , and then fresh tests (consistency, density and water retention), hardened tests (density, tensile and compressive strength, modulus of elasticity, capillary and immersion absorption and adhesion resistance) and finally thermal testing with the KD-2Pro appliance and thermal performance through a prototype simulating the incidence of heat on a wall. The results show that the workability was improved according to the incorporation of expanded vermiculite, the density in the fresh and hardened state was reduced, the compressive strength decreased slightly, the voids index and the bond strength increased. All sealing systems with ceramic bricks coated by the mortars under analysis met the requirements established by NBR 15575 (ANBT, 2013). The thermal performance evaluated by the prototype showed an improvement in thermal insulation according to the incorporation of expanded vermiculite, obtaining more significant results for mortars with 45 and 50% substitution, which came to isolate 34 ° C and 40 ° C, respectively. Therefore, the expansion of expanded vermiculite in cement mortars is able to benefit from thermal insulation without causing major damage to other mortar properties, making it a product with good thermal and mechanical performance.

BANKING MEMBERS:
Presidente - 671.403.354-00 - KLEBER CAVALCANTI CABRAL - UFERSA
Interna - 1717461 - LUCIANA DE FIGUEIREDO LOPES LUCENA
Externo à Instituição - WENDELL ROSSINE MEDEIROS DE SOUZA - UFERSA