CONSIDERATIONS WHEN SPECIFYING LITHIUM ADMIXTURES TO MITIGATE THE RISK OF ASR
作者单位：Scott Wilson Pavement Engineering9/10 Faraday BuildingNottingham Science and Technology ParkUniversity BoulevardNottinghamNG7 2QPUK. Building Research EstablishmentGarston WatfordWD25 9XXUK. Department of Civil EngineeringHead HallUniversity of New BrunswickFrederictonNBE3B 5A3Canada.
会议名称：《第十二届国际混凝土碱集料反应会议》
会议日期：2004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：Lithium Specification Pulverized-fuel ash Fly ash.
摘 要：正 Based on research conducted at the Building Research Establishment （BRE） and work from across the globe, theUK has established recommended addition levels of lithium admixtures as one method to minimize the risk ofdeleterious alkali-silica reaction （ASR）.These addition levels allow increases in the permitted alkali content of concrete mixtures beyond that previouslyrecommended in the UK, and allow for combinations of lithium admixtures with pulverized-fuel ash （pfa） alsoknown as fly ash, a supplementary cementitious material or Type Ⅱ*** the impossibility of testing every lithium admixture addition level in combination with every alkali contentconcrete mixture, the recommendations are based on a pragmatic approach to safe specification. Thisspecification process includes interpolation of threshold levels and determination of an appropriate margin ofsafety based on concrete batching practices in the UK and embodied in European *** paper provides an overview of the use of lithium salts to mitigate deleterious ASR and provides furtherresearch evidence to validate the findings of previous authors. The paper explains the research basis for the UKrecommendations and describes the approach to the safe specification of lithium admixtures. Theserecommendations were published in BRE Information paper IP 1/02, and are now included in the 2004 edition ofBRE Digest 330, and referenced in the British Standard, BS 8500.