A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Influence of Dispersion Methods of Microcrystalline Cellulose on the Mechanical Behavior of Cement Pastes
The idea of using cellulose-based reinforcement is to explore all the benefits of the cellulose, the main component responsible for the strength of plants. With notable mechanical and physical properties, microcrystalline cellulose (MCC) inclusions are able to reinforce different types of matrices. In cementitious materials, the investigations about microcrystalline cellulose inclusions are quite recent. Moreover, the challenge involving dispersion is one of the limiting factors with regard to the full effectiveness of their properties. In order to assess the effect of the inclusion of MCC on the mechanical properties of cement pastes, compression and four-point bending tests were carried out with several contents of MCC, from 0.05% to 1% in mass of cement. The present work also aims to compare different methods of dispersion of microcrystalline cellulose into water by means of mechanical and chemical approaches, for further addition in cement pastes. The methods include mechanical stirring, superplasticizer addition, surfactant addition, and ultrasonication. Results show an impressive enhancement of the flexural properties of more than 5 and 8 times for strength and modulus, respectively with 0.75% of MCC. The use of ultrasonication as a dispersion method showed to be the most effective to disperse 0.05% of MCC.
Influence of Dispersion Methods of Microcrystalline Cellulose on the Mechanical Behavior of Cement Pastes
The idea of using cellulose-based reinforcement is to explore all the benefits of the cellulose, the main component responsible for the strength of plants. With notable mechanical and physical properties, microcrystalline cellulose (MCC) inclusions are able to reinforce different types of matrices. In cementitious materials, the investigations about microcrystalline cellulose inclusions are quite recent. Moreover, the challenge involving dispersion is one of the limiting factors with regard to the full effectiveness of their properties. In order to assess the effect of the inclusion of MCC on the mechanical properties of cement pastes, compression and four-point bending tests were carried out with several contents of MCC, from 0.05% to 1% in mass of cement. The present work also aims to compare different methods of dispersion of microcrystalline cellulose into water by means of mechanical and chemical approaches, for further addition in cement pastes. The methods include mechanical stirring, superplasticizer addition, surfactant addition, and ultrasonication. Results show an impressive enhancement of the flexural properties of more than 5 and 8 times for strength and modulus, respectively with 0.75% of MCC. The use of ultrasonication as a dispersion method showed to be the most effective to disperse 0.05% of MCC.
Influence of Dispersion Methods of Microcrystalline Cellulose on the Mechanical Behavior of Cement Pastes
RILEM Bookseries
Serna, Pedro (editor) / Llano-Torre, Aitor (editor) / Martí-Vargas, José R. (editor) / Navarro-Gregori, Juan (editor) / de Souza, Letícia O. (author) / Souza, Lourdes Maria Silva (author) / de A. Silva, Flávio (author)
RILEM-fib International Symposium on Fibre Reinforced Concrete ; 2021 ; Valencia, Spain
Fibre Reinforced Concrete: Improvements and Innovations II ; Chapter: 74 ; 871-878
RILEM Bookseries ; 36
2021-09-05
8 pages
Article/Chapter (Book)
Electronic Resource
English