A new type of core sample tensile strength test device

Abstract

A novel core sample tensile strength test device includes a sleeve with a pull plate, a test piece fixing sleeve, a washer and a pull-out device. The test piece fixing sleeve includes the sleeve, the upper part of the sleeve wall is an inner wire part with uniform thickness, and the bottom of the inner wire part gradually becomes thicker downwards, and the cross section is a positive trapezoid; the gasket is composed of two semicircular arcs of the same size , its thickness gradually decreases along the vertical direction, and the cross-section is an inverted trapezoid matching the positive trapezoid at the lower part of the sleeve. The washer and the test piece fixing sleeve can be engaged with each other to clamp the test piece; the sleeve with pull plate is threadedly connected with the inner part of the sleeve, one end of the pulling device is hinged with the sleeve with pull plate, and the other end is connected with It is hinged with the tensile testing machine. The invention simplifies the preparation and processing processes of bonding, pulling out of the tensile test piece and the drawing plate, peeling off of the broken test piece and the drawing plate, etc., and improves the working efficiency to the greatest extent.

Description

technical field [0001] The invention relates to a novel core sample tensile strength testing device. Background technique [0002] When the traditional method is used to test the tensile strength of concrete core samples, use building structural glue (usually epoxy resin) to bond the two ends of the core sample to the steel drawing plate respectively, and place it carefully for several hours (usually about 24 hours). load test. The traditional method mainly has the following disadvantages: [0003] 1. It is difficult to fully bond the pull plate and the core sample, and the pull plate is easy to fall off during the test. If it falls off, the epoxy cement needs to be removed and bonded again, which is time-consuming and laborious, and the success rate cannot be guaranteed; [0004] 2. Epoxy resin has certain toxicity. The harmless treatment procedure of damaged test pieces and remaining materials is cumbersome and costly. If it is not handled properly, it will cause environ...

AI Technical Summary

Problems solved by technology

[0003] 1. It is difficult to fully bond the pull plate and the core sample, and the pull plate is easy to fall off during the test. If it falls off, the epoxy cement needs to be removed and bonded again, which is time-consuming and laborious, and the success rate cannot be guaranteed;

[0004] 2. Epoxy resin has certain toxicity. The harmless treatment procedure of damaged test pieces and remaining materials is cumbersome and costly. If it is not handled properly, it will cause environmental pollution; and it will cause damage to the health of operators in the process of sample preparation and treatment of test pieces. ;

[0005] 3. Epoxy resin is expensive, and cannot be reused, and the test cost is high;

[0006] 4. After the epoxy resin has bonded the drawing plate and the core sample, it needs to stand still for 1 day before the loading test can be carried out. After the core sample is damaged, it will take a lot of time and manpower to peel off the core sample and the drawing plate, so one set of tests It usually takes 2 to 3 days for the equipment to complete the tensile strength test of a core sample, and it will take at least 1 week for a set of equipment to conduct a set of core sample tests, and the time and labor costs are high

Images