Beneficial use of limestone filler with calcium sulphoaluminate cement

Abstract The present study compares the cement hydration process and the mortar properties of samples containing calcium sulphoaluminate clinker and gypsum combined with quartz filler or limestone filler. Two different calcium sulphoaluminate clinker to gypsum mass ratios are tested, 5.26 and 2.50, at 20 °C and at 5 °C. Cement hydration is studied by isothermal calorimetry, X-ray diffraction and thermogravimetry on cement pastes containing filler. Setting time, strength development and volume stability are measured on mortar samples containing additional sand. The results show that the use of limestone filler instead of quartz filler modifies the cement hydration process and is beneficial for the mortar properties at 20 °C and at 5 °C. It accelerates the early hydration of the cement, thus shortening the initial setting time. After some days, the calcite from the limestone filler leads to the formation of hemicarbonate, which tends to stabilize ettringite and to minimize the formation of monosulphoaluminate. This efficiently increases the strength of the mortars containing limestone filler rather than quartz filler.

[1]  J. Pera,et al.  Immobilization of Heavy Metals by Calcium Sulfoaluminate Cement , 2005 .

[2]  E. Gartner.  Industrially interesting approaches to “low-CO2” cements ☆ , 2004 .

[3]  Liang Zhang,et al.  Development of the use of sulfo- and ferroaluminate cements in China , 1999 .

[4]  J. Pera,et al.  Development of self-leveling screed based on calcium sulfoaluminate cement: Modelling of curling due to drying , 2008 .

[5]  F. Winnefeld,et al.  Calorimetric and thermogravimetric study on the influence of calcium sulfate on the hydration of ye’elimite , 2010 .

[6]  F. Glasser,et al.  Hydration of calcium sulphoaluminate cements , 1996 .

[7]  B. Lothenbach,et al.  The Role of Calcium Carbonate in Cement Hydration , 2007 .

[8]  B. Lothenbach,et al.  A thermodynamic approach to the hydration of sulphate-resisting Portland cement. , 2006, Waste management.

[9]  F. Winnefeld,et al.  Influence of calcium sulfate and calcium hydroxide on the hydration of calcium sulfoaluminate clinker , 2009 .

[10]  L. Santoro,et al.  Long-term behaviour of hydraulic binders based on calcium sulfoaluminate and calcium sulfosilicate , 1995 .

[11]  R. Talero,et al.  Early hydration of portland cement with crystalline mineral additions , 2005 .

[12]  E. Kadri,et al.  Combined effect of chemical nature and fineness of mineral powders on Portland cement hydration , 2010 .

[13]  Barbara Lothenbach,et al.  Thermodynamic properties of Portland cement hydrates in the system CaO–Al2O3–SiO2–CaSO4–CaCO3–H2O , 2007 .

[14]  N. Setter,et al.  The effect of fillers on strength of cement mortars , 1977 .

[15]  B. Franke.  Bestimmung von Calciumoxyd und Calciumhydroxyd neben wasserfreiem und wasserhaltigem Calciumsilikat , 1941 .

[16]  B. Lothenbach,et al.  The AFm phase in Portland cement , 2007 .

[17]  B. Lothenbach,et al.  Hydration of calcium sulfoaluminate cements — Experimental findings and thermodynamic modelling , 2010 .

[18]  B. Lothenbach,et al.  Thermodynamic Modelling of the Effect of Temperature on the Hydration and Porosity of Portland Cement , 2008 .

[19]  H.-J. Kuzel,et al.  Solid solution of ettringites part I: incorporation of OH− and CO32- in 3CaO.A12O3.32H2O , 1990 .

[20]  J. Pera,et al.  New applications of calcium sulfoaluminate cement , 2004 .

[21]  F. Glasser,et al.  Hydration of calcium sulfoaluminate cement at less than 24 h , 2002 .

[22]  G. D. Schutter,et al.  Cement Hydration In The Presence Of High Filler Contents , 2005 .

[23]  Erick Ringot,et al.  Mineral admixtures in mortars Effect of inert materials on short-term hydration , 2003 .

[24]  W. A. Gutteridge,et al.  Filler cement: The effect of the secondary component on the hydration of Portland cement: Part I. A fine non-hydraulic filler , 1990 .

[25]  F. Hanic,et al.  Mechanism of hydration reactions in the system C4A3SCSCaOH2O referred to hydration of sulphoaluminate cements , 1989 .

[26]  F. Glasser,et al.  High-performance cement matrices based on calcium sulfoaluminate–belite compositions , 2001 .

[27]  M. Ribeiro.  Expansive cement blend for use in shrinkage-compensating mortars , 1998 .

[28]  H. Darweesh.  Limestone as an accelerator and filler in limestone-substituted alumina cement , 2004 .

[29]  Fredrik P. Glasser,et al.  Investigation Of The Microstructure And Carbonation Of CSA-Based Concretes Removed From Service , 2005 .

[30]  Frank Winnefeld,et al.  The ternary system Portland cement–calcium sulphoaluminate clinker–anhydrite: Hydration mechanism and mortar properties , 2010 .

[31]  Lars Wadsö,et al.  Applications of an eight-channel isothermal conduction calorimeter for cement hydration studies , 2005 .

[32]  J. Ideker,et al.  Advances in alternative cementitious binders , 2011 .

[33]  G. Saoût,et al.  Influence of limestone on the hydration of Portland cements , 2008 .

[34]  Erick Ringot,et al.  Efficiency of mineral admixtures in mortars: Quantification of the physical and chemical effects of fine admixtures in relation with compressive strength , 2006 .

[35]  Liangbo Zhang.  Microstructure and performance of calcium sulfoaluminate cements , 2000 .