Effect of a Carboxylic Acid on Rheological Properties of a High Alumina Cement Mortar

Document Type : Research Article


1 Research Unit on Emerging Materials (RUEM), University Ferhat Abbas Setifl, Setif 19000, ALGERIA

2 Laboratory of Non Metallic Materials, Institute of Optics and Precision Mechanics, University Ferhat Abbas Setif1, Setif 19000, ALGERIA

3 Laboratory MATEIS (UMR CNRS 5510), Bat. Blaise PASCAL, INSA, Villeurbanne, FRANCE


In this work, we studied the effect of carboxylic acid on the rheological properties of a high-alumina cement mortar (CH45) produced by the Algerian firm REFRACTAL.The investigated properties are setting time, water consumption, electrical conductivity, pH, density and the compressive strength. The results show a setting time of about 200 min for the acid free, 180 min with 0.1 % of carboxylic acid and 18 hours with 2 % of this acid. A significant reduction in water consumption was noticed. The water/cement ratio of the acid free-mortar is reduced from 0.24 to 0.16 with 2% acid. The rheological investigations carried out on the mortar-water mixtures with and without carboxylic acid show a Newtonian behavior. The setting of hydrated mortar-water with acid mixtures shows an increase in the apparent density leading to an improvement of the compressive strength.


Main Subjects

[1] Oliveira I.R., Ortega F.S., Pandolfelli V.C., Hydration of CAC Cement in a Castable Refractory Matrix Containing Processing Additives. Ceram. Int., 35 (4), p. 1545 (2009).
[2] Smith A., El Hafiane A., Bonnet Y., Quintard J.P., Tanouti B., Role of a Small Addition of Acetic Acid on the Setting Behavior and on the Microstructure of a Calcium Aluminate Cement, J. Am. Ceram. Soc., 88(8), p. 2079 (2005). 
[3] Scrivener K.L., Compas A., Calcium Aluminate Cements, Chapter 13, in: "Lea’s Chemistry of Cement and Concrete", Edition P. C. Hewlett, (2004).
[5] Currell B.R., Grzeskowiak R., Migley H.G., Parsonage J.R., The Acceleration and Retardation of Set High Alumina Cement by Additives, Cem. Concr. Res., 17(3), p. 420 (1987).
[6] Pivinskii Yu.E., Dyakin Pav. V., Dyakin P.V., Dispersing (Deflocculating) Aluminas.  Refract. Ind. Ceram., 45(3), p. 201 (2004).
[7] Scrivener K.L., "Historical and Present Day Application of Calcium Aluminate Cements. in Calcium Aluminate Cements", [Edited by R. J. Mangabhai and F. P. Glasser,] The University Press, Cambridge (2001).
[8] Aitcin P.C., Baron J., "Les Adjuvants Normalisés Pour Bétons. Les Bétons-Bases et Données Pour Leur Formulation", [Edition Eyrolles,] Paris (1996).
[9] American Society for Testing and Materials, "ASTM C305-99", Annual Book of ASTM Standards, West Conshohocken, Pa (2002).
[10] Oprea G., Troczynski T., Esanu F., Rheology Studies on Bonding Systems for Self-Flow Refractory Castables. 5th Unified International Technical Conference on Refractories- a Worldwide Technology (UNITECR’97). Radisson Hotel, New Orleans, LA. 1(3), p. 613-624 (1997).
[14] Neville A.M., "Properties of Concrete", Longman, London (1995).
[17] Banfill P.F.G., Kithing D.R., "Use of a Controlled Stress Rheometer to Study the Yield Stress of Oil Well Cement Slurries, In Rheology of Fresh Cement and Concrete", Editors: Banfill P.F.G., Spon E., Spon F.N., Chapman and Hall (1991).
[18] Shunsuke H., Kazuo Y., Rheology and Early Age Properties of Cement Systems, Cem. Concr. Res., 8(2), p. 175 (2008).
[19] Couarraze G., Grossiord J.L., "Initiation à La Rhéologie Technique et Documentation", Lavoisier, Paris, (1993).
[20] El Hafiane Y., Smith A., Bonnet J.P., Tanouti B., Effect of a Carboxylic Acid on the Rheological Behavior of an Aluminous Cement Paste and Consequences on the Properties of the Hardened Material, J. Eur. Ceram. Soc., 25(7), p. 1143 (2005).
[21] Chartier T., "Procédés de Mise en Forme Des Céramiques Matériaux et Processus Céramiques", Edition Hermés Science Publication, Paris, (2001). 
[22] Hidber P.C., Graule T.J., Gauckler L.J., Influence of the Dispersant Structure on Properties of Electrostatically Sstabilized Aqueous Alumina Suspensions, J. Eur. Ceram. Soc., 17(2-3), p. 239 (1997).
[23] Jolicoeur C., Simard M.A., Chemical Admixture-Cement Interactions: Phenomenology and Physico-Chemical Concepts, Cem. Concr. Compos., 20(2-3), p. 87 (1998).