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Alternative ways to characterize fine particlesfor concrete


Testing of different types of sand

 


Historically, glaciofluvial materials deposited during the ice age have provided a good source of concrete aggregate in Sweden. These natural aggregates are of rounded shape and quite favourable grading. Nevertheless, alternative sources of aggregate are now considered due to environmental reasons and to preserve the remaining eskers. Crushed rock presents a good replacement for the concrete industry. However, it is important to adjust the mix design of the concrete accordingly to the new properties of the material. Most rock in Sweden is granite, showing a large variation in the properties of the crushed fines. This variation needs to be studied and classified since many of the fresh and hard concrete properties are dependent on the fines. According to [1], three main factors that affect the flow properties of fresh concrete are particle shape, friction and interlocking.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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