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Fly ash in concrete: Properties and performance, RILEM Report 7
Cement & Concrete Composites 13 (1991) 275-276
Book Reviews Corrosion Rates of Steel in Concrete, A S T M STP 1065. Edited by Neal S. Berke, Victor Chaker and David Whiting. Available in Europe from American Technical Publishers Ltd., 27-29 Knoll Piece, Wilbury Way, Hitchin, Herts, SG4 0SX. 1990. ISBN 0-8031-1458-3. Price: £34.00.
depends on many factors and these are discussed in one paper. The influence of blastfurnace slags on the corrosion rate of steel in concrete is also reported in one paper. The corrosion of steel in concrete in now recognised as a multibillion dollar problem in several parts of the world. Whilst the techniques reported and the views expressed in the papers in this volume may not all be adopted or shared, they go a long way in enhancing our understanding on the initiation and monitoring of corrosion. In this respect, this publication will be highly valued by all researchers and engineers involved in reinforced concrete.
One of the problems facing engineers confronted with corrosion of steel in reinforced concrete structures is the development of test methods that can be used to determine and predict corrosion rates of steel in concrete. Nondestructive techniques can be very helpful not only in identifying corrosion in its early stages but also in evaluating new corrosion protection methods, and indeed, in developing maintenance and repair strategies. The papers included in this ASTM Special Technical Publication address this problem, and proFly Ash in Concrete: Properties and Performance, vide a good starting point to the evaluation of test RILEM Report 7. Edited by K. Wesche. Published by E & FN Spon (Chapman and Hall), London. methods related to corrosion rates of steel in concrete. 1991. ISBN 0-419-15790-5. Price: £37.50. There are thirteen papers included in this This comprehensive report is the result of the publication. The papers were presented at a work of the RILEM Technical Committee 67Symposium held in Baltimore, Maryland, USA in FAB, 'Use of Fly Ash in Building'. Constituted in June 1988. Of the thirteen papers, eight deal with corrosion measurements using a wide range of 1981, the main objectives of the Committee were techniques. The techniques discussed include to produce a state-of-the-art document describing the properties of fly ash concrete and its use in polarization resistance measurements, macrocell current measurements, electrochemical impebuilding and to make recommendations on new or dance measurements, potential mapping and the modified test methods relating to the use of fly ash. The publication is evidence that both objectuse of the double-counter electrode system. The papers highlight the limitations of these methods, ives have largely been achieved - over 800 references are quoted as the basis for the report and and the relevance of the measured values to corrosion in real structures. two test methods are recommended. The report is One of the difficulties met with in practice is undoubtedly a commendable effort by a large number of experts over a considerable period of the possibility of increased galvanic action between the parent concrete and the repaired time, and should offer a sound and world-wide concrete. One paper addresses the evolution of source of information to all researchers on concrete. the degradation of repaired specimens and the results of electrochemical testing of such speciThe report is divided into five major sections. mens. Partially submerged concrete in chlorideThe first section deals with the characterization of containing water also creates problems, and fly ash in relation to mineralogical and chemical corrosion measurements in such columns are also composition, granulometry, water requirement, pozzolanicity etc. This is followed by a section reported in another paper. The critical concentration of CI- necessary to devoted to properties in the fresh state including initiate corrosion of steel embedded in concrete setting and plastic shrinkage. Section three 275 Cement & Concrete Composites (13) ( 1991 ) - © 1992 Elsevier Science Publishers Ltd, England. Printed in Great Britain
276
Book reviews
describes the properties of the hardened mortar and concrete - by far the largest of all sections, extending to about 120 printed pages. This section discusses hydration and strength development, deformation behaviour, frost and chemical resistance, carbonation and chloride attack. Section four is devoted to uses of fly ash, and this includes bricks, blocks, lightweight aggregates, road construction and soil stabilization. All the references are grouped together in section five and the appendix with the two recommended test methods concludes the report.
Inevitably a report such as this is not quite upto-date, and developments reported during the last five years are not fully incorporated. Some misconceptions are carried forward - such as the cause of reduced water demand being due to the spherical shape and ball bearing effect. Modulus of rupture is defined as the ratio of maximum tensile stress to strain. These are minor omissions and do not deter the value of the comprehensive nature and coverage of the report. A report such as this is an invaluable guide and reference text for further research and usage of fly ash.
Book Reviews Corrosion Rates of Steel in Concrete, A S T M STP 1065. Edited by Neal S. Berke, Victor Chaker and David Whiting. Available in Europe from American Technical Publishers Ltd., 27-29 Knoll Piece, Wilbury Way, Hitchin, Herts, SG4 0SX. 1990. ISBN 0-8031-1458-3. Price: £34.00.
depends on many factors and these are discussed in one paper. The influence of blastfurnace slags on the corrosion rate of steel in concrete is also reported in one paper. The corrosion of steel in concrete in now recognised as a multibillion dollar problem in several parts of the world. Whilst the techniques reported and the views expressed in the papers in this volume may not all be adopted or shared, they go a long way in enhancing our understanding on the initiation and monitoring of corrosion. In this respect, this publication will be highly valued by all researchers and engineers involved in reinforced concrete.
One of the problems facing engineers confronted with corrosion of steel in reinforced concrete structures is the development of test methods that can be used to determine and predict corrosion rates of steel in concrete. Nondestructive techniques can be very helpful not only in identifying corrosion in its early stages but also in evaluating new corrosion protection methods, and indeed, in developing maintenance and repair strategies. The papers included in this ASTM Special Technical Publication address this problem, and proFly Ash in Concrete: Properties and Performance, vide a good starting point to the evaluation of test RILEM Report 7. Edited by K. Wesche. Published by E & FN Spon (Chapman and Hall), London. methods related to corrosion rates of steel in concrete. 1991. ISBN 0-419-15790-5. Price: £37.50. There are thirteen papers included in this This comprehensive report is the result of the publication. The papers were presented at a work of the RILEM Technical Committee 67Symposium held in Baltimore, Maryland, USA in FAB, 'Use of Fly Ash in Building'. Constituted in June 1988. Of the thirteen papers, eight deal with corrosion measurements using a wide range of 1981, the main objectives of the Committee were techniques. The techniques discussed include to produce a state-of-the-art document describing the properties of fly ash concrete and its use in polarization resistance measurements, macrocell current measurements, electrochemical impebuilding and to make recommendations on new or dance measurements, potential mapping and the modified test methods relating to the use of fly ash. The publication is evidence that both objectuse of the double-counter electrode system. The papers highlight the limitations of these methods, ives have largely been achieved - over 800 references are quoted as the basis for the report and and the relevance of the measured values to corrosion in real structures. two test methods are recommended. The report is One of the difficulties met with in practice is undoubtedly a commendable effort by a large number of experts over a considerable period of the possibility of increased galvanic action between the parent concrete and the repaired time, and should offer a sound and world-wide concrete. One paper addresses the evolution of source of information to all researchers on concrete. the degradation of repaired specimens and the results of electrochemical testing of such speciThe report is divided into five major sections. mens. Partially submerged concrete in chlorideThe first section deals with the characterization of containing water also creates problems, and fly ash in relation to mineralogical and chemical corrosion measurements in such columns are also composition, granulometry, water requirement, pozzolanicity etc. This is followed by a section reported in another paper. The critical concentration of CI- necessary to devoted to properties in the fresh state including initiate corrosion of steel embedded in concrete setting and plastic shrinkage. Section three 275 Cement & Concrete Composites (13) ( 1991 ) - © 1992 Elsevier Science Publishers Ltd, England. Printed in Great Britain
276
Book reviews
describes the properties of the hardened mortar and concrete - by far the largest of all sections, extending to about 120 printed pages. This section discusses hydration and strength development, deformation behaviour, frost and chemical resistance, carbonation and chloride attack. Section four is devoted to uses of fly ash, and this includes bricks, blocks, lightweight aggregates, road construction and soil stabilization. All the references are grouped together in section five and the appendix with the two recommended test methods concludes the report.
Inevitably a report such as this is not quite upto-date, and developments reported during the last five years are not fully incorporated. Some misconceptions are carried forward - such as the cause of reduced water demand being due to the spherical shape and ball bearing effect. Modulus of rupture is defined as the ratio of maximum tensile stress to strain. These are minor omissions and do not deter the value of the comprehensive nature and coverage of the report. A report such as this is an invaluable guide and reference text for further research and usage of fly ash.