Method and device for measuring load temperature strain coefficient of concrete test piece at high temperature

• Main Authors: SHEN LEI, CAO MAOSEN, REN QINGWEN
• Format: Patent
• Language: Chinese; English
• Published: 21.04.2020
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention provides a method and device for measuring the load temperature strain coefficient of a concrete test piece at a high temperature. The device comprises a cylindrical thermal insulation layer which is used for sleeving the periphery of the cylindrical concrete test piece; a heating element and a temperature measuring element which are arranged on the inner wall of the cylindrical thermal insulation layer; two bearing plates which are arranged at two axial ends of the concrete test piece respectively; heat preservation layer arranged between the bearing plates and the end surface of the concrete test piece respectively; and an axial displacement meter used for measuring the axial deformation length ofthe concrete test piece. The device measures the free axial deformation length, the load axial deformation length and the radial deformation length of the concrete test piece, and obtains a thermal expansion coefficient of the concrete free temperature strain, a deformation coefficient of the axial lo