EECA - Artigos publicados em periódicos
URI Permanente para esta coleção
Navegar
Navegando EECA - Artigos publicados em periódicos por Assunto "Aditivo superplastificante"
Agora exibindo 1 - 1 de 1
Resultados por página
Opções de Ordenação
Item Efeitos do uso de aditivo com nanosílica em suspensão coloidal na consistência e resistência mecânica do concreto(Ricardo Prado Abreu Reis, 2017-04) Campos Neto, Tiago Ferreira; Geyer, André Luiz BortolacciThe concrete’s performance depends on its behavior in the fresh and hardened states. Generally, studies of nanosilica (nS) are focused on performance analysis in the hardened state and they are founded on the use of the mineral admixture in dry grains. Thus, this paper aims to evaluate the effects of superplasticizer admixture use with nanosilica in colloidal suspension in the consistency and strength of the concrete. Two mixtures were produced with the same materials and identical proportions, however with different superplasticizes, one with and the other without nanosilica. The mixture without nanosilica (CC) was used as reference to analyse the effects of the presence of mineral admixture in the other mixture (CnS), both in the development of the consistency and the mechanical strength of the concrete. For evaluation of these properties were carried slump tests as a function of time and compressive strength at 28 days. The results showed that the concrete without nanosilica presented greater time available for handling and also higher slump values throughout the test. However, the concrete with the superplasticizer with nanosilica performed better in the hardened state, reaching highest mechanical strength.