Concrete durability testing device and method under synergistic action of freezing-thawing and loading

Abstract

The invention provides a concrete durability testing device and method under the synergistic action of freezing-thawing and loading. The concrete durability testing device comprises a testing device body, a constant hydraulic source device and a control circuit, the testing device body comprises a freeze-thaw box, a specimen box, a jack, a movable pressing plate, limiting rods, an electric refrigeration unit and an electric heating unit, concrete specimens are placed in the specimen box, the two sides of the concrete specimens are limited through the limiting rods, and the jack is arranged onthe upper part of the freeze-thaw box; and a water inlet pipe and a water outlet pipe are arranged on the specimen box, and a freeze-thaw liquid inlet pipe and a freeze-thaw liquid outlet pipe are arranged on the freeze-thaw box. The concrete durability testing method includes the steps of (a), specimen manufacturing; (b), specimen placement; (c), equipment connection; (d), constant load applying;(e), water and freeze-thaw liquid introducing; (f), freeze-thaw cycle control; and (g), test analysis. According to the concrete durability testing device, a concrete durability test of the concretespecimens under the synergistic action of freezing-thawing circulation and loading can be implemented automatically, the beneficial effects are significant, and the concrete durability test device issuitable for application and popularization.

Description

technical field [0001] The invention relates to a concrete durability test device and method, more specifically, to a concrete durability test device and method under the synergistic action of freeze-thaw-load. Background technique [0002] Concrete is the most widely used engineering material in infrastructure construction in my country. For hydraulic concrete structures in cold regions, they are continuously subjected to the synergistic effect of load and freeze-thaw cycles during service, resulting in gradual damage to the concrete structure from the surface to the inside, reducing the safety performance of the structure, and may lead to the collapse of the concrete structure in severe cases , causing huge casualties and economic losses. Therefore, using reasonable test devices and methods to study the durability of concrete structures under the synergistic effect of load-freeze-thaw cycles is a hot issue that scholars at home and abroad are currently paying attention to...

AI Technical Summary

Problems solved by technology

Although the device can compensate the load of the specimen by regularly adjusting the runner, the error is relatively large by adjusting the runner each time to compensate for the load difference, and the increase in the number of compensations will lead to the continuous accumulation of load errors, which cannot meet the continuous application of stable loads. requirements

In addition, the repeated observation and compensation process is cumbersome, consumes more manpower and material resources, and has a low degree of automation

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