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Fine aggregate testing methods for field conditions

Mix optimization and process control


The most commonly used methods for sand quality control in concrete production are evidently particle size distribution or grading based on sieve analysis. Usually the test results show that the delivered sand is within specification requirements and no further actions are required. The test results are just filed as stated in the quality control scheme. In the era of high performance concrete this procedure is not sufficient. The concrete producers have to know more about the properties of the aggregates used, especially the properties of the sand. Although sand usually accounts for only half of the aggregate volume, it has a pronounced effect through various mechanisms, such as particle packing, specific surface and mineralogy. More detailed information on sand properties helps selecting the most suitable sand quality in case several alternative suppliers are available. It also helps identifying changes in sand properties which may cause production problems.

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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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