Sulphate attack on concrete

The types of disruption observed during sulphate attack on mortars or concretes, and the chemical processes involved, are summarized. Concrete mix design and binder type have an important influence on concrete performance in sulphate environments. The present UK Codes of Practice (based on BRE Digest 250) reflect the technical information available for various binders currently used in the UK. Sulphate-resisting Portland cement is a purpose-made cement designed to resist sulphates. The chemical factors giving rise to its sulphate resistance are well understood, and its performance has been uniformly good in experimental trials throughout the world. This cement is the standard by which other binders are judged, and should continue to be the preferred binder for concretes expected to withstand sulphate concentrations in ground waters greater than 3000 mg SO4− −/l. Although partial replacement of ordinary Portland cement (OPC) by various latent hydraulic binders can lead to improved sulphate resistance, the ...

[1]  William Stewart Holden,et al.  Water treatment and examination , 1970 .

[2]  T. Thorvaldson,et al.  Studies on the Action of Sulphates on Portland Cement: III. The Effect of the Addition of Silica Gel to Portland Cement Mortars on Their Resistance to Sulphate Action , 1929 .

[3]  A M Paillere,et al.  COMPORTEMENT A L'EAU DE MER DES CIMENTS AVEC ET SANS CONSTITUANTS SECONDAIRES A EFFET POUZZOLANIQUE - INFLUENCE DU TRAITEMENT THERMIQUE ET DE LA PRESENCE D'ENTRAINEUR D'AIR , 1981 .

[4]  M. Moukwa,et al.  Deterioration of concrete in cold sea waters , 1990 .

[5]  H. Taylor Chemistry of Cements , 1938, Nature.

[6]  Mufid A. Samarai,et al.  The disintegration of concrete containing sulphate-contaminated aggregates , 1976 .

[7]  T. Thorvaldson,et al.  The Action Of Sulphate Solutions On Steam-Cured Composite Cement Mortars , 1938 .

[8]  W. H. Harrison Durability tests on building mortars — effect of sand grading , 1986 .

[9]  E. Tkalcec,et al.  Influence of amorphous silica (silica dust) on the properties of portland cement mortars , 1987 .

[10]  L. Heller,et al.  Effect of chloride solutions on portland cement , 1966 .

[11]  M. L. Conjeaud,et al.  Mechanism of Sea Water Attack on Cement Mortar , 1980 .

[12]  A Paillere,et al.  INFLUENCE DU CIMENT SUR LA DEGRADATION DU BETON EN MILIEU MARIN , 1985 .

[13]  Menashii D. Cohen,et al.  Durability of Portland Cement-Silica Fume Pastes in Magnesium and Sodium Sulfate Solutions , 1988 .

[14]  Della M. Roy,et al.  C4A3S hydration ettringite formation, and its expansion mechanism: I. expansion; Ettringite stability , 1981 .

[15]  D C Teychenne,et al.  SULPHATE RESISTANCE OF BURIED CONCRETE; SECOND INTERIM REPORT ON LONG-TERM INVESTIGATION AT NORTHWICK PARK , 1981 .

[16]  J. V. Aardt,et al.  Thaumasite formation: A cause of deterioration of portland cement and related substances in the presence of sulphates , 1975 .

[17]  G J Osborne THE EFFECTIVENESS OF A CARBONATED OUTER LAYER TO CONCRETE IN THE PREVENTION OF SULPHATE ATTACK . PROTECTION OF CONCRETE. PROCEEDINGS OF THE INTERNATIONAL CONFERENCE HELD AT THE UNIVERSITY OF DUNDEE, SEPTEMBER 11-13, 1990 , 1990 .

[18]  P. T. Sherwood,et al.  The Stabilization with Cement of Weathered and Sulphate-Bearing Clays* , 1957 .

[19]  D. W. Hobbs Expansion and shrinkage of oversulphated portland cements , 1978 .

[20]  Edgardo F. Irassar SULFATE RESISTANCE OF BLENDED CEMENT: PREDICTION AND RELATION WITH FLEXURAL STRENGTH , 1990 .

[21]  John Clough Thresh,et al.  The Examination of Water and Water Supplies , 1925, The Indian Medical Gazette.

[22]  N. J. Crammond,et al.  Thausamine in failed cement mortars and renders from exposed brickwork , 1985 .

[23]  R Peltier RESULTS OF LONG-TERM TESTS ON THE RESISTANCE OF CEMENT TO SEA WATER, CARRIED OUT AT THE MARITIME LABORATORY IN LA ROCHELLE , 1973 .

[24]  G. L. Kalousek,et al.  Concrete for long-time service in sulfate environment , 1972 .

[25]  N. J. Crammond EXAMINATION OF MORTAR BARS CONTAINING VARYING PERCENTAGES OF COARSELY CRYSTALLINE GYPSUM AS AGGREGATE , 1984 .

[26]  E. J. Benton,et al.  MECHANISM OF SEAWATER ATTACK ON CEMENT PASTES , 1970 .