Alkali-silica reactivity of different natural sands

Category Other
Group GSI.IR
Location International Geological Congress,oslo 2008
Author Tudrul, Atiye۱; Hasdemir, Selahattin۲; Yilmaz, Murat۱
Holding Date 17 September 2008

Natural sands are potential materials from the point of alkali-aggregate reaction in concrete. The objective of this study is to determine alkali-silica reactivity of selected natural sands in different origin and composition. The study was carried out on natural sands that are widespread in the Marmara Region of Turkey.
Samples were collected from sand quarries located in BlackSea Shore-Akp‎nar Region, Çorlu, Muratl‎ and Sinekli Regions, فstanbul-Ömerli Region and Bursa-Mustafakemalpa‏a Region, which provide a significant amount of fine aggregate for concrete production The mineralogical and chemical composition of the sands were firstly determined. Accelerated mortar bar test were then used to evaluate the potential alkali reactivity of the sands. As a result of this study; active silica (chert, chalcedony etc.), metamorphised quartz and rock particles are potentially deleterious for alkali-aggregate reactions.