Cement-based material compression creep testing device

Abstract

The invention discloses a cement-based material compression creep testing device which comprises a double-station gate-type loading machine, wherein cement-based material cast test pieces which are connected in series through middle metal connecting discs are clamped between upper pressing discs and lower pressing discs on the double-station gate-type loading machine; load sensors are connected with the lower pressing discs; the load sensors are connected with a computer; the computer is connected with a control end of a hydraulic control part through a controller and a hydraulic servo system and is used for controlling the hydraulic driving part to act upwards and downwards to achieve load control; the double-station gate-type loading machine is mounted inside a sealed adiabatic box body; temperature, humidity, pH value and salt mist regulating equipment is mounted inside the box body. The acidity, the alkalinity and the salt mist can be adjusted. By improving a load control system of loading equipment, a stable and adjustable environment adjusting system can be provided, and the cement-based material compression creep testing device has the advantages of precise data measurement, high measurement efficiency and high automation degree.

Description

technical field [0001] The invention belongs to the technical field of testing cement-based materials, and in particular relates to a compression creep testing device for cement-based materials. Background technique [0002] Creep of cement-based materials refers to the continuous and increasing strain phenomenon of cement-based materials under continuous load. Creep characteristics are directly related to external conditions such as curing temperature and humidity. It is of great practical significance to simulate the creep characteristics of cement-based materials in extreme environments such as high temperature, high humidity, high salt and strong acid-base corrosion. [0003] Commonly used compression creep loading equipment is usually divided into lever type, lever spring type, spring type and hydraulic type. Due to the large size of the lever-type and lever-spring-loaded equipment, it is expensive to install a large-volume environmental chamber, which is usually used ...

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Problems solved by technology

Due to the large size of the lever-type and lever-spring-loaded equipment, it is expensive to install a large-volume environmental chamber, which is usually used to test the creep characteristics at room temperature, while the spring-loaded equipment has stress relaxation during loading, and the equipment needs to be loaded periodically adjustment, the effect of voltage stabilization is poor, the measurement accuracy is low, the hydraulic loading equipment has a compact structure, and the load is stable, but the existing loading equipment is expensive, and the compression creep measurement cycle is long, and the common compression experimental equipment can only perform a single test piece at a time Compression test, measurement efficiency is very low

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