Artículo
Evaluation of the hydration of Portland cement modified with polyvinyl alcohol and nano clay
Fecha de publicación:
01/2011
Editorial:
Trans TEch Publishers
Revista:
Key Engineering Materials
ISSN:
1013-9826
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Polyvinylalcohol (PVA) is a polymer soluble in hot water, it has the property of film formation and it can improve the concrete performance. The effects of PVA modified with nano clay on the cement hydration reaction have been investigated by means of semiadiabatic calorimeter, FTIR spectroscopy and SEM. FTIR spectroscopy was employed to monitor chemical transformation of cement. The morphology of the different samples was compared by means of SEM micrographs. With the semiadiabatic calorimeter the hydration kinetic was measured to compare the heat rate of the admixtures materials. Fixing the water-cement ratio, w/c, in 0,45, the ratio of polymer to cement (p/c) was 2 wt% and the ratio of clay to polymer was 4 wt% (0.8wt.% related to cement). The polymer and modified polymer admixtures produced a retardation effect on the kinetic of cement hydration, but the clay acts as nucleating agent. The increase of the temperature with time was measured and a new model with four parameters was employed and the kinetic parameters were determined for each sample.
Palabras clave:
BENTONITE
,
CEMENT
,
CLAY
,
HYDRATION
,
POLYMER
,
POLYVINYLALCOHOL
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Articulos(INTECIN)
Articulos de INST.D/TEC.Y CS.DE LA ING."HILARIO FERNANDEZ LONG"
Articulos de INST.D/TEC.Y CS.DE LA ING."HILARIO FERNANDEZ LONG"
Citación
Piqué, Teresa María; Balzamo, Humberto Marcelo; Vázquez, Analía; Evaluation of the hydration of Portland cement modified with polyvinyl alcohol and nano clay; Trans TEch Publishers; Key Engineering Materials; 466; 1-2011; 47-56
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