Details

Autor(en) / Beteiligte

• García-Maté, M.
• De la Torre, A.G.
• León-Reina, L.
• Aranda, M.A.G.
• Santacruz, I.

Titel

Hydration studies of calcium sulfoaluminate cements blended with fly ash

Ist Teil von

• Cement and concrete research, 2013-12, Vol.54, p.12-20

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The main objective of this work is to study the hydration and properties of calcium sulfoaluminate cement pastes blended with fly ash (FA) and the corresponding mortars at different hydration ages. Laboratory X-ray powder diffraction, rheological studies, thermal analysis, porosimetry and compressive strength measurements were performed. The analysis of the diffraction data by Rietveld method allowed quantifying crystalline phases and overall amorphous contents. The studied parameters were: i) FA content, 0, 15 and 30wt.%; and ii) water addition, water-to-CSA mass ratio (w/CSA=0.50 and 0.65), and water-to-binder mass ratio (w/b=0.50). Finally, compressive strengths after 6months of 0 and 15wt.% FA [w/CSA=0.50] mortars were similar: 73±2 and 72±3MPa, respectively. This is justified by the filler effect of the FA as no strong evidences of reactivity of FA with CSA were observed. These results support the partial substitution of CSA cements with FA with the economic and environmental benefits.