Work

Effect of Alkali-activation in the Microstructure, Setting-time and Compressive Strength of Portland Cement Pastes and Mortars

Year: 2008

Type: article

Abstract: This work presents a study about alkali-activation of Portland cement pastes and mortars by Na 2 O, K 2 O, Na 2 SiO 3 and K 2 CO 3 , in proportions of 0, 3, 5, 10 and 15%, in weight. The aim was correlate the microstructures formed with the properties developed in the fresh and hardened stages. The results show that the alkalis changes the chemical equilibrium of all hydrates formed, and this promotes lower compressive strength in final ages. Quickly setting times and early-high compressive strengths have been obtained with alkalis, but as Na 2 SiO 3 and K 2 CO 3 were more efficient.

Source: Revista Brasileira de Aplicações de Vácuo

DOI: 10.17563/rbav.v24i2.93

Authors: Luiz Guilherme Meira de Souza, F. J. Silva, Clelio Thaumaturgo

Language: Portuguese

Topic: Concrete and Cement Materials Research

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

OpenAlex ID: W2728054888

FWCI:

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