Effect of EVA on the fresh properties of cement paste
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
23/10/2013
23/10/2013
2012
|
| Resumo |
The improved workability effect of latex in dry mortars has not been fully clarified. The purpose of this research was to investigate the influence cif the EVA copolymer on the cement hydration and on the rheological properties of cement pastes. The results pointed to a minor influence of EVA on cement hydration and to a ball-bearing effect. In fact, the shear thinning behavior of reference paste at 15 min after mixing changed to shear thickening owing to the EVA addition. This behavior could be explained by the decrease in the interparticle separation distance as consequence of the solid content increase in case of shearing detachment of weakly adhered EVA particles from the cement particles surfaces. The expected EVA plasticizing effect was observed at 60 min. Such behavior points to the stabilization of EVA on the cement particles surfaces, thus resulting in a steric barrier effect. (C) 2011 Elsevier Ltd. All rights reserved. CAPES CAPES CNPq CNPq |
| Identificador |
CEMENT & CONCRETE COMPOSITES, OXFORD, v. 34, n. 2, supl. 4, Part 1-2, pp. 255-260, FEB, 2012 0958-9465 http://www.producao.usp.br/handle/BDPI/35655 10.1016/j.cemconcomp.2011.10.004 |
| Idioma(s) |
eng |
| Publicador |
ELSEVIER SCI LTD OXFORD |
| Relação |
CEMENT & CONCRETE COMPOSITES |
| Direitos |
closedAccess Copyright ELSEVIER SCI LTD |
| Palavras-Chave | #CEMENT PASTE #EVA #REDISPERSIBLE POLYMER POWDER #RHEOMETRY #RHEOLOGY #CALORIMETRY #RHEOLOGICAL BEHAVIOR #PORTLAND-CEMENT #ADMIXTURES #HYDRATION #CONSTRUCTION & BUILDING TECHNOLOGY #MATERIALS SCIENCE, COMPOSITES |
| Tipo |
article original article publishedVersion |
