Banca de DEFESA: VALONE SANTOS NUNES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : VALONE SANTOS NUNES
DATE: 29/10/2020
TIME: 08:30
LOCAL: Sala virtual (videoconferência)
TITLE:

Evaluation of the effect of the partial replacement of cement for limestone residues on the mechanical and thermal properties of light concrete

KEY WORDS:

Lightweight concrete, ultra-lightweight concrete, low density, cement consumption, and limestone residue.

PAGES: 111
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUMMARY:

The use of lightweight concrete was first recorded over 3000 years ago. Due to their thermal properties, lower cost and greater production capacity, both lightweight concrete and ultra-lightweight concrete have been explored in the construction of prefabricated structural lightweight concrete buildings, bridges, marine platforms and fair-faced concrete buildings. Therefore, this work aimed to evaluate the effects on the mechanical and thermal properties of lightweight concrete (CL), with partial replacement of cement by limestone residue, using fine quartz sand, expanded clay, and expanded vermiculite, as leaf aggregates. The mechanical behavior was performed through tests of resistance to compression, dynamic elasticity module and indirect traction by diametrical compression, and the physical behavior through tests of water absorption by immersion, void index, porosity, specific mass, thermal conductivity in addition to microstructural analysis (FRX and DRX) of the limestone residue. For comparison purposes, a reference concrete mix was made without any substitution and, from it, a partial substitution of cement was made in 5%, 10%, 15%, 20% and 25%, by limestone residue. Another important factor considered in the study was the consumption of cement, which remained between 262.5 and 350 kg / m³. All concrete density less than 1.0 g / cm³, with a reduction of up to 7.78% with the replacement of 25% of cement with limestone waste.

BANKING MEMBERS:
Presidente - 1298936 - ANTONIO EDUARDO MARTINELLI
Externo ao Programa - 1149530 - JOSE AIRTON CUNHA COSTA
Externo à Instituição - KLEBER CAVALCANTI CABRAL - UFERSA