Banca de QUALIFICAÇÃO: JULIANA SOFIA FONSECA CAMARGOS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : JULIANA SOFIA FONSECA CAMARGOS
DATE: 20/12/2022
TIME: 14:00
LOCAL: https://conferenciaweb.rnp.br/webconf/paulo-henrique-ribeiro-borges
TITLE:

On the development of foamed alkali-activated slag mortars: factors governing the physical and mechanical properties

KEY WORDS:

Foamed alkali-activated materials; hydrogen peroxide; aluminium powder; sodium dodecyl sulfate, thermal curing

PAGES: 50
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Construção Civil
SPECIALTY: Materiais e Componentes de Construção
SUMMARY:

The industrialization of civil construction is an important phenomenon that has grown in the past decades and modular construction is one of its segments. In this context, it is interesting to produce lighter elements as cladding materials and foamed mortars are one attractive option once they combine low density and enough mechanical strength for different applications. They can be produced by different routes and the most applied ones are the chemical foaming method that uses foaming agents, and mechanical foaming method, that uses surfactants. The necessity of reducing the impacts of civil construction on the environment inspires the development of new sustainable materials, given that Portland cement (PC) is the second most used material in the world and the production of 1 ton of PC is responsible for releasing around 0.8 tons of CO₂. Alkali activated materials (AAM) are binders that act as alternatives to PC and alkali-activated foams (AAF) combine the benefits of foamed structures and alkali-activated matrices. The goal of this work is to study the influence of the type and percentage of different foaming agents, the use of surfactants and the curing temperature on the physical, mechanical and functional properties of alkali activated foams. [JC1] Alkali-activated blast furnace slag (BFS) was chosen as binder. Hydrogen Peroxide and Aluminum powder will be used as foaming agents while Sodium dodecyl sulfate (SDS) will be employed as surfactant. The results may confirm whether (i) the increase in the foaming agent will result in the production of mortars with lower densities; (ii) the use of surfactants promotes the production of mortar with higher compressive strength for the same density and (iii) thermal curing promotes higher compressive strength at short term (early curing age).

COMMITTEE MEMBERS:
Interna - FLAVIA SPITALE JACQUES POGGIALI
Presidente - PAULO HENRIQUE RIBEIRO BORGES
Externo à Instituição - WHITE JOSÉ DOS SANTOS - UFMG