TY - JOUR
T1 - Quantitative correlations among textural characteristics of C-S-H gel and mechanical properties
T2 - Case of ternary Portland cements containing activated paper sludge and fly ash
AU - Goñi, S.
AU - Frias, M.
AU - Vegas, I.
AU - García, R.
AU - De La Villa, R. Vigil
PY - 2012/9
Y1 - 2012/9
N2 - The hydraulic activity of ternary Portland cements containing different proportions of commercial thermally activated paper sludge (APS(I)) and fly ash (FA) from coal combustion was evaluated from the textural characterization of the C-S-H gels formed during hydration. The study was accomplished by means of the specific surface area (SSA) and pore-size distribution (PSD), which were measured by the sorption isotherms of nitrogen gas and the BET method. The microstructure was characterized by scanning electron microscopy (SEM). The incorporation of such admixtures (APS and FA) clearly revealed an increase in both porosity and SSA. This effect decreased with the progress of hydration, together with a refinement of the nano-porous structure of C-S-H. In addition, high correlations were found between nano-structural characteristics of the C-S-H gel and mechanical compressive strengths.
AB - The hydraulic activity of ternary Portland cements containing different proportions of commercial thermally activated paper sludge (APS(I)) and fly ash (FA) from coal combustion was evaluated from the textural characterization of the C-S-H gels formed during hydration. The study was accomplished by means of the specific surface area (SSA) and pore-size distribution (PSD), which were measured by the sorption isotherms of nitrogen gas and the BET method. The microstructure was characterized by scanning electron microscopy (SEM). The incorporation of such admixtures (APS and FA) clearly revealed an increase in both porosity and SSA. This effect decreased with the progress of hydration, together with a refinement of the nano-porous structure of C-S-H. In addition, high correlations were found between nano-structural characteristics of the C-S-H gel and mechanical compressive strengths.
KW - Activated paper sludge
KW - Calcium-silicate-hydrate (C-S-H)
KW - Compressive strength
KW - Fly ash
KW - Surface area
KW - Ternary blended cement
UR - http://www.scopus.com/inward/record.url?scp=84862894028&partnerID=8YFLogxK
U2 - 10.1016/j.cemconcomp.2012.05.002
DO - 10.1016/j.cemconcomp.2012.05.002
M3 - Article
AN - SCOPUS:84862894028
SN - 0958-9465
VL - 34
SP - 911
EP - 916
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
IS - 8
ER -