SPECIFICATIONS AND GUIDELINES FOR PRODUCTION OF AAR RESISTANT CONCRETE IN NORWAY
作者单位：SINTEF Civil and Environmental EngineeringNO-7465 TrondheimNorway SINTEF Civil and Environmental EngineeringNO-7465 TrondheimNorway Dr.ing.S.W.DanielsenP.O.Box 144 TillerNO-7476 TrondheimNorway Control Council for Concrete ProductsP.O.Box 53 BlindernNO-0313 OsloNorway Norwegian Public Roads AdministrationP.O.Box 8142NO-0033 OsloNorway NorBetong ASP.O.Box 15NO-5847 BergenNorway NorcemP.O.Box 38NO-3991 BrevikNorway
会议名称：《第十二届国际混凝土碱集料反应会议》
会议日期：1000年
学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学]
关 键 词：Alkali-aggregate reactivity Concrete materials Specifications
摘 要：正 AAR was recognised as a durability challenge in Norway some 15 years ago. Since then, several comprehensive national research projects on this subject have been carried out. These projects have strongly focused on test methods and corresponding criteria for the prediction of AAR as observed on Norwegian concrete structures. In 1996 the Norwegian Concrete Association produced a publication giving guidelines for handling AAR in Norway. Based on technological knowledge obtained after 1996, and the fact that the publication now shall be a harmonised normative reference document to the new concrete materials standard, NS-EN 206, a revised version of the publication will be provided in September *** 2004 edition is divided into two major parts. Part 1 is in formal terms describing the mandate and the use of the publication, and how concrete constituents and concrete recipes shall be tested and evaluated with respect to potential AAR. Individual aggregates and blends of aggregates shall be evaluated by petrographical analyses as a first step. The evaluation based on result from these analyses can be reassessed by a mortar bar expansion test, while a concrete prism expansion test can be used to reassess the evaluation from any of these tests. For the evaluation of binders and concrete compositions, only the concrete prism expansion test can be used. Part 2 gives advisory guidelines for how the concrete industry can fulfil the requirements given in the Part 1 specifications. More complementary descriptions of the test methods and corresponding evaluation criteria are presented and illustrated by examples. Part 2 also provides a survey of binders and corresponding alkali contents documented to be suited for production of AAR resistant concrete containing all types and amounts of Norwegian reactive aggregates. This survey will be updated whenever new binders obtain satisfactory documentation. The revised publication will be a valuable and updated tool for handling AAR