Applied Research Of Ultrasonic-Rebound Synthetic Method In Inspecting Concrete Strength Of Bridge Structure

The dissertation adopts the means of experiment to research the influence factors and ultrasonic-rebound synthetic method of inspecting Concrete strength. The aim is to increase the inspection accuracy of ultrasonic-rebound synthetic method .The dissertation first analyzes the affecting factors and designs across experiment and introducts ultrasonic-rebound synthetic method curve formula, at the same time The dissertation studied two kinds of the ultrasonic-rebound synthetic method which effectively applied ultrasonic-rebound synthetic method in examining different characteristic bridge structure strength.The dissertation chooses the limestone aggregate used on freeway in Jiangsu province according to different match ratio strength grade in the room environment and open field. cement test piece,special constructed test piece and engineering entity test piece applied, the three aspects have be analysed in research.The research of Experimenting indicate the ultrasonic even measure is capable in concrete examine.the even velocity of ultrasonic is less to versus,and the method of the ultrasonic even measure has better relativity to versus, two kinds of ultrasonic even measure can convert to each other; while the axes of reinforcing steel aplombs the spreading direction of ultrasonic, there is no influence to the velocity of ultrasonic. while the axes of reinforcing steel bar parallel the spreading direction of ultrasonic, reinforcing steel bar can avoid the affect to velocity of ultrasonic to leave the certain distance.The damp appearance and the dry appearance of the test piece have little affect to the velocity of ultrasonic,the affect even can be neglected;the outcome of the structure strength is identical when compared to the ultrasonic even measure and ultrasonic versus measure.