Abstract
The article considers methods of control for measuring the tension force of the reinforcing element for creating prestress in prefabricated reinforced concrete structures. The basic methods of control for measuring the tension force of the reinforcing element of pre-stressed reinforced concrete are gravity method, methodof measuring according to the indicators of the dynamometer, method of measuring by the indicators of the pressure gauge, method of measuring along the length of the elongation bar, method of transverse pulling of the bar and frequency method. The processes of calibration of instruments and evaluation of the tension force of the reinforcing element are described too. The simultaneous use of two methods for measuring the pre-tension in bar secures better control of the manufacture of reinforced concrete structures. In the construction of monolithic bridges prestressed concrete to control of the tension bars are often used: the methods of measuring the force by the indicators of the pressure gauge and the methods of measuring the force by the indicators of the elongation of the bar. Reliable measurement assurance at all stages of the production of reinforced concrete structures pre-tension will significantly reduce the risks emergence of defect in the parameters controlled by measurements. For control the value of bar tensionin manufacturing of prefabricated stressed reinforced concrete elements it is expedient to use method of transverse pulling of the bar and frequency method. In modern conditions for the development of enterprises for the manufacture of construction products, the actual question is the introduction of automation into production processes and control over their quality. The introduction of automation in the production process, and quality control tension barsto create prestressing concrete structures will reduce labor-intensive and time for produce one element. Metrological ascurance for automation of execution and control processes behind the measurements of tightening forces in production of reinforcing element are actuality area of research.
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