Abstract
Construction company Skanska a.s. is active in the field of reinforcement structures. Skanska finds measuring of early-age compressive strength very important because of removing of the formwork. This paper deals with three nondestructive methods for estimating compressive strength. Skanska started a collaboration with institute of building testing FAST VUT at the beginning of the year. Collaboration was focused on measuring of early-age strength of concrete with rebound hammer SilverSchmidt PC L. The paper includes the equation for calculation of compressive strength of C 30/37 XC4 from the rebound coefficient. Evaluation was done using results from rebound hammer and press value of crushed cubes. Calculated equation was compared with equation provided by producer of the hammer. This paper also deals with Concremote monitoring system, which is used for estimating early age compressive strength in the structure. This system, offered by company Doka, is based on maturity method. This paper shortly presents experiences with use of Concremote on site BD Hornomecholupska.
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