Download or read book Guide Specification for Concrete Subject to Alkali silica Reactions written by and published by . This book was released on 2007 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guide Specification for Concrete Subject to Alkali silica Reactions written by and published by . This book was released on 1994 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PCA s Guide Specification for Concrete Subject to Alkali silica Reactions written by Rachel Jean Detwiler and published by . This book was released on 2003 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aggregates susceptible to alkali-silica reaction must sometimes be used in concrete. The concrete industry published a Guide Specification for Concrete Subject to Alkali-Silica Reactions (1998) to aid users in identifying susceptible aggregates and verifying the effectiveness of candidate control measures. In this work, three fly ashes of different CaO contents and one GGBFS were tested in two different dosages to determine their effectiveness in controlling expansions. The test program was designed to examine the relative importance of three mechanisms by which supplementary cementing materials control expansion due to alkali-silica reaction: (1) dilution of alkalies, (2) reduction of permeability and diffusivity, and (3) binding of alkalies. A moderately reactive quartzite aggregate was used for all tests. Following the Guide Specification for Concrete Subject to Alkali-Silica Reactions, the ASTM C 1260 expansion at 14 days showed that 15% and 25% of the low-CaO fly ash and 50% GGBFS were all effective in controlling expansions. The same combinations of cementitious materials also were tested according to ASTM C 1293 for two years. In this test 25% of the low-CaO fly ash and 50% of the GGBFS were effective in controlling expansions. Petrographic examination of selected prisms at the end of these tests showed that both the extent of alkali-silica reaction and the degree of microcracking were consistent with the expansions. Additional ASTM C 1293 specimens were made with concentrations of alkali comparable to that of the control specimens. The results showed that the beneficial effect of supplementary cementing materials in controlling expansions due to alkali-silica reaction cannot be attributed only to dilution of the alkalies.
Download or read book Guide Specifications for Concrete Subject to Alkali silica Reactions written by Mid-Atlantic Regional Technical Committee and published by . This book was released on 1993 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Alkali Silica Reaction in Concrete written by R N Swamy and published by CRC Press. This book was released on 1991-09-01 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the fundamental causes and spectrum effects of ASR. It considers he advances that have been made in our understanding of this problem throughout the world.
Download or read book Alkali silica Reaction in Concrete written by CRC Press and published by . This book was released on 1997 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete can deteriorate as a result of an interaction between alkaline pore fluids (prinicipally originating from the Portland cements) and reactive minerals in certain types of aggregates. The mechanism of deterioration is known as alkali-aggregate reaction (AAR); it can occur in a number of forms, the most common being alkali-silica reaction (ASR). This Digest is in four parts. Part 1 gives the background to the detailed and simplified guidance contained in Parts 2 and 4. Part 2 gives detailed guidance for minimising the risk of damaging ASR in new construction. Part 3 gives worked examples. Part 4 gives simplified guidance for new construction using aggregates of normal reactivity.
Download or read book Alkali Aggregate Reaction in Concrete written by Marc-Andre Berube and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alkali silica Reaction in Concrete written by Building Research Establishment. Centre for Concrete Construction and published by . This book was released on 1999 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete can deteriorate as a result of an interaction between alkaline pore fluids (prinicipally originating from the Portland cements) and reactive minerals in certain types of aggregates. The mechanism of deterioration is known as alkali-aggregate reaction (AAR); it can occur in a number of forms, the most common being alkali-silica reaction (ASR).
Download or read book Alkali silica Reaction in Concrete Background to the guidance notes written by and published by . This book was released on 2004 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete can deteriorate as a result of an interaction between alkaline pore fluids (prinicipally originating from the Portland cements) and reactive minerals in certain types of aggregates. The mechanism of deterioration is known as alkali-aggregate reaction (AAR); it can occur in a number of forms, the most common being alkali-silica reaction (ASR).
Download or read book Alkali silica Reaction in Concrete written by and published by . This book was released on 1997 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete can deteriorate as a result of an interaction between alkaline pore fluids (prinicipally originating from the Portland cements) and reactive minerals in certain types of aggregates. The mechanism of deterioration is known as alkali-aggregate reaction (AAR); it can occur in a number of forms, the most common being alkali-silica reaction (ASR). This Digest is in four parts. Part 1 gives the background to the detailed and simplified guidance contained in Parts 2 and 4. Part 2 gives detailed guidance for minimising the risk of damaging ASR in new construction. Part 3 gives worked examples. Part 4 gives simplified guidance for new construction using aggregates of normal reactivity. This Digest gives guidance for general concreting applications; guidance for concrete in highly specialised applications is outside its scope. For highway structures, in particular, information is available from the Highways Agency.
Download or read book Alkali silica Reaction in Concrete written by D. W. Hobbs and published by Thomas Telford Publishing. This book was released on 1988 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Very Good,No Highlights or Markup,all pages are intact.
Download or read book Alkali silica Reaction in Concrete written by CRC Press and published by . This book was released on 1997 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete can deteriorate as a result of an interaction between alkaline pore fluids (prinicipally originating from the Portland cements) and reactive minerals in certain types of aggregates. The mechanism of deterioration is known as alkali-aggregate reaction (AAR); it can occur in a number of forms, the most common being alkali-silica reaction (ASR). This Digest is in four parts. Part 1 gives the background to the detailed and simplified guidance contained in Parts 2 and 4. Part 2 gives detailed guidance for minimising the risk of damaging ASR in new construction. Part 3 gives worked examples. Part 4 gives simplified guidance for new construction using aggregates of normal reactivity. This part of the Digest contains simplified, essential recommendations for minimising the risk of damaing ASR; it applies to concrete in which aggregates of normal reactivity are to be used with cementitious materials, with mix designs commonly used in the UK. The decision to provide simplified guidance was taken in response to comments received at the public comment stage of this 1997 revision of the Digest. This simplified guidance is not a substitute for the full recommendations: if you have any doubt about any aspect of this guidance, you should refer to the full text in Part 2. Because the guidance for aggregate combinations classified as normal reactivity is more onerous than that for low reactivity aggregates, the guidance here can be used for both.
Download or read book Alkali silica Reaction in Concrete written by Building Research Establishment. Centre for Concrete Construction and published by . This book was released on 1999 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete can deteriorate as a result of an interaction between alkaline pore fluids (prinicipally originating from the Portland cements) and reactive minerals in certain types of aggregates. The mechanism of deterioration is known as alkali-aggregate reaction (AAR); it can occur in a number of forms, the most common being alkali-silica reaction (ASR).
Download or read book The CRC Handbook of Mechanical Engineering written by D. Yogi Goswami and published by CRC Press. This book was released on 2004-09-29 with total page 2690 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of this standard-setting handbook provides and all-encompassing reference for the practicing engineer in industry, government, and academia, with relevant background and up-to-date information on the most important topics of modern mechanical engineering. These topics include modern manufacturing and design, robotics, computer engineering, environmental engineering, economics, patent law, and communication/information systems. The final chapter and appendix provide information regarding physical properties and mathematical and computational methods. New topics include nanotechnology, MEMS, electronic packaging, global climate change, electric and hybrid vehicles, and bioengineering.
Download or read book Alkali silica Reaction in Concrete Detailed guidance for new construction written by and published by . This book was released on 2004 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete can deteriorate as a result of an interaction between alkaline pore fluids (prinicipally originating from the Portland cements) and reactive minerals in certain types of aggregates. The mechanism of deterioration is known as alkali-aggregate reaction (AAR); it can occur in a number of forms, the most common being alkali-silica reaction (ASR).
Download or read book Concrete Construction Engineering Handbook written by Edward G. Nawy and published by CRC Press. This book was released on 2008-06-24 with total page 1586 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Concrete Construction Engineering Handbook, Second Edition provides in depth coverage of concrete construction engineering and technology. It features state-of-the-art discussions on what design engineers and constructors need to know about concrete, focusing on - The latest advances in engineered concrete materials Reinforced concrete construction Specialized construction techniques Design recommendations for high performance With the newly revised edition of this essential handbook, designers, constructors, educators, and field personnel will learn how to produce the best and most durably engineered constructed facilities.
Download or read book Alkali sicilica Reaction written by and published by . This book was released on 1987 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
