Laboratory determination method of sulfate erosion depth in concrete

Abstract

The invention discloses a laboratory determination method of sulfate erosion depth in concrete, and belongs to the concrete testing field. The laboratory determination method of sulfate erosion depth in concrete includes the following steps: manufacturing a concrete column test block: pre-pasting a foil gauge on the surface of a plain round steel bar, and pouring concrete by taking the plain round steel bar as the center to manufacture a concrete column test block, wherein the length of the concrete column test block is equal to the length of the plain round steel bar; immersing the concrete column test block in a barrel with sulfate liquor; using a pressure testing machine to perform an axle pressure test on the test block: disposing the barrel with the concrete column test block on the pressure testing machine, performing an axle pressure test with the specified constant pressure on the upper and lower surfaces of the concrete column test block, wherein the test time is not less than half a year, and the steel bar strain epsilons is obtained through the foil gauge on the plain round steel bar, and then through force equilibrium, by means of three formulas, the depth DeltaL that the concrete is eroded by sulfate can be derived; and changing the specified constant pressure, calculating the depth DeltaL that the concrete is eroded by sulfate in different pressure and in different time.

Description

technical field [0001] The invention belongs to the field of concrete measurement, in particular to a laboratory method for measuring the depth of sulfate erosion of concrete. Background technique [0002] Concrete has a strong ability to resist external erosion and has a durability similar to natural stone, so when using concrete, only its strength is often considered. However, in the actual use environment, concrete is eroded by harmful substances in various external factors such as air, soil, and water, or the physical and chemical effects of harmful components in concrete itself, and the durability of concrete will be degraded. One-third of my country's land is under the action of acid rain. In the actual environment, sulfate is widely distributed in the soil and water environment. Therefore, sulfate erosion is an important performance that affects the durability of concrete. They pass Various transport mechanisms penetrate into the interior of concrete and react with ce...

AI Technical Summary

Problems solved by technology

[0003] There is no simple and practical laboratory method for measuring the depth of sulfate attack of concrete

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