Banca de DEFESA: ANDRE BARROSO MOURAO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ANDRE BARROSO MOURAO
DATE: 14/12/2021
TIME: 09:00
LOCAL: https://conferenciaweb.rnp.br/webconf/junia-nunes-de-paula
TITLE:

USE OF ASHES FROM SUGAR CANE BAGGAGE FROM THE PRODUCTION OF ARTISAN CACHAÇA AS A PARTIAL REPLACEMENT TO CEMENT IN THE PROPERTIES OF CEMENT MORTARS

KEY WORDS:

Sustainability, sugarcane bagasse ash, residues, mortar.

PAGES: 88
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Construção Civil
SPECIALTY: Materiais e Componentes de Construção
SUMMARY:

The cement industry accounts for approximately 7% of global CO2 emissions inherent to human action, mainly due to the large consumption of energy and volume of emissions resulting from the production of clinker, the main constituent of Portland cement. Supplementary cementitious materials (MCS) they are sustainable alternatives for reducing these impacts, as they improve some properties of cementitious compounds and can be used as a partial replacement for cement, thus reducing clinker consumption. Sugarcane bagasse ash (CBCA) is an alternative to MCS as it is a residue from the sugar-alcohol industry that is rich in amorphous silica, which can lead to improvements in the properties of mortars and concretes. This study aims to evaluate the effects of partial replacement of cement by CBCA on the mechanical and physical properties of mortars. The ashes were collected at Decision, a manufacturer of artisanal cachaça, located in Sabinópolis-MG. Two ash samples were used, CBCA-M, ash submitted to the grinding procedure, and CBCA-MR, submitted to grinding and reburning. The grinding procedure was the same for the two samples and the reburning took place at a temperature of 600 oC for 3 hours. The pozzolanic activity of the ash was evaluated using the Pozzolanic Activity Index (IAP) test according to NBR 5752 (ABNT, 2014) and by the conductivity method proposed by Luxán et al (1989). Reference mortars were produced with 10% and 20% replacement (by volume) of cement by the two samples of CBCA to carry out the following tests: compressive strength (7, 28 and 91 days); tensile strength(28 days); immersion water absorption index. The results show that CBCA-M and CBCA-MR are non-pozzolanic materials, the addition of ash did not affect the tensile strength of the mortars and, for compressive strength, the mortars with 10% CBCA-MR had similar performance to the reference. As for the absorption index, the addition of ash with a coarser particle size than cement produced mortars with greater porosity open to water.

BANKING MEMBERS:
Presidente - JUNIA NUNES DE PAULA
Interno - AUGUSTO CESAR DA SILVA BEZERRA
Externo à Instituição - FERNANDO DO COUTO ROSA ALMEIDA - UFMG
Externo à Instituição - NORMANDO PERAZZO BARBOSA - UFPB