Concrete testing device for loading and freeze-thawing coupling effect

Abstract

The invention relates to the technical field of concrete test and in particular relates to a concrete testing device for a loading and freeze-thawing coupling effect. The concrete testing device comprises a fixed frame, an isolating plate, a bottom pedestal, a plurality of fixing rods and two or more trapezoidal screw rods; the plurality of fixing rods are uniformly distributed on the fixed frame,the isolating plate and the bottom pedestal and vertically pass through the fixed frame, the isolating plate and the bottom pedestal; the trapezoidal screw rods vertically pass through the fixed frame and the isolating plate and are equidistantly distributed; the trapezoidal screw rod at the upper end of the fixed frame is provided with a runner; the trapezoidal screw rod located between the isolating plate and the bottom pedestal is provided with a connecting plate; the corresponding bottom pedestal located below the connecting plate is provided with a concrete test piece box; and a testingcavity is provided with a freeze-thawing liquid inlet valve and a freeze-thawing liquid outlet valve. The concrete testing device is simple and clear in theory, convenient to use, capable of continuously applying a load under a freeze-thawing environment, also capable of testing the compressive strength of a concrete test piece subjected to freeze-thawing cycle and free of moving a concrete material.

Description

technical field [0001] The invention relates to the technical field of concrete testing, in particular to a concrete testing device for coupled action of load and freeze-thaw. Background technique [0002] In actual engineering, infrastructure gradually exposed some durability problems. Most of the damage to building concrete was caused by the coupling of load, carbonation, freeze-thaw, and corrosion. At present, more and more people pay more and more attention to the durability of concrete structures, and the relevant experimental research is gradually considering the coupling effect of multiple factors from a single element. The loading of files presents many difficulties. Therefore, it is of great significance for future research to establish a concrete test device for the coupled action of load and freeze-thaw. [0003] At present, there are already some concrete loading devices under the coupling of multiple factors in China, which are mainly divided into two types: o...

AI Technical Summary

Problems solved by technology

The device can carry out the load test immediately after the freeze-thaw test without moving the concrete material, but has the following disadvantages: 1. Its structure and installation equipment are relatively complicated; 2. Controllers such as motor controllers and jack controllers consume more energy; 3. Only a single concrete specimen can be processed, and the efficiency is low; 4. The concrete residue after loading is not easy to handle

[0005] The announcement number is CN103674708A, and the announcement date is March 26, 2014. The Chinese patent "Experimental Loading Device for Concrete Durability Research Under Multi-Factor Coupling" has four screws and pressure rings arranged symmetrically. The upper channel steel, upper kun shaft, concrete specimen, lower kun shaft, and lower channel steel are simple to operate, but have the following disadvantages: 1. It is impossible to accurately control the load uniformity of multiple nuts, and the four bolts If it is tightened at the same time, it is not easy for one person to operate, and multiple people need to do it at the same time

2. The strain gauge is easily affected during the freezing and thawing process, resulting in inaccurate results. You should choose a strain gauge with temperature self-compensation or add a compensation sheet

Images