Cement-based material axial pressure creep testing device capable of regulating and controlling temperature, humidity and load

Abstract

The invention discloses a cement-based material axial pressure creep testing device capable of regulating and controlling temperature, humidity and load. The cement-based material axial pressure creep testing device comprises: an integral testing framework, wherein the integral testing framework consists of a fixed steel frame, a bearing support column, a bearing lever, a protecting device, a stabilizing device, bolts and the like; an axial pressure load regulation and control system composed of a slidable connecting device, a dead load counterweight device and a force transmission device; a test condition control system consisting of a temperature regulation and control device and a humidity regulation and control device; and a creep data acquisition and recording system consisting of a cement-based material sample, an axial pressure deformation measuring device and a data transmission and acquisition device. According to the invention, after a test piece and a deformation testing device are installed, the position of a bearing support column is adjusted, a counterweightblock matched with creep stress needed for testing is placed on a bearing tray, the needed temperature and humidity are set, and finally the temperature and humidity change is checked regularly and the creep degree progress is recorded; and the whole axial pressure creep testing device and method are simple and easy to implement, and the deformation characteristics of the cement-based material under various temperature and humidity and different creep stresses can be obtained.

Description

technical field [0001] The invention relates to the field of durability performance testing of cement-based materials, in particular to axial pressure creep testing technology, in particular to a cement-based material axial pressure creep testing device and testing method capable of regulating temperature, humidity and load. Background technique [0002] The axial creep of cement-based materials refers to the phenomenon that the strain of cement-based materials increases continuously under the action of continuous compressive stress. As an important factor affecting the durability and safety performance of materials and engineering structures, axial creep is significantly affected by ambient temperature, humidity and loading stress. Therefore, it is of great significance to be able to accurately determine the influence of temperature, humidity and stress level changes on the axial creep properties of cement-based materials. [0003] At present, the axial creep test of cemen...

AI Technical Summary

Problems solved by technology

However, these devices either use hydraulic jacks that are difficult to maintain a constant stress and springs with high rigidity to provide stress, or use counterweights with a large demand as the stress provider, and it is difficult to achieve accurate and convenient goals.

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