Slip form concrete on-site demoulding strength measuring device and method

Abstract

The invention discloses a slip form concrete on-site demoulding strength measuring device and method. The measuring device comprises a shell, a displacement sensor and a vertical centering base, a control device, a power supply device, a pressure sensor and a buzzer are arranged in the shell; the power supply device supplies power to the measuring device; one end of a distance measuring rod is connected with the buzzer in the shell, and the other end extends out of the shell and is connected with the displacement sensor; the probe and the displacement sensor are arranged at the same end of theshell, a digital display screen and a control panel are arranged on the shell, a probe hole matching the probe is formed in the center of the vertical centering base, at least two base support arms are further arranged on the vertical centering base, and support arm holes matching the base support arms are formed in the shell. The method comprises two steps of sample preparation and on-site determination. The device is used for measuring the real demolding strength of the slip form concrete site, and the demolding time is further accurate in combination with a comparison mortar measurement method, so that errors can be greatly reduced, and the construction quality and safety are improved.

Description

technical field [0001] The invention relates to a measuring device and a measuring method, in particular to a measuring device and method for on-site demoulding strength of slipform concrete. Background technique [0002] Sliding formwork pouring concrete is a relatively common concrete construction process, which is mainly used in shafts, pier walls, concrete panels, inclined shafts and other parts of hydropower and water conservancy projects. During the construction of sliding formwork concrete, it is necessary to determine the release strength of the concrete when the sliding formwork is lifted. When the concrete stripping strength of the sliding formwork is low, the concrete is easy to collapse; when the concrete stripping strength is too high, it will be difficult to lift the sliding formwork, and the concrete will crack. If the release strength of slipform concrete is too low or too high, quality accidents and safety accidents are prone to occur. [0003] The existin...

AI Technical Summary

Problems solved by technology

When the concrete stripping strength of the sliding formwork is low, the concrete is easy to collapse; when the concrete stripping strength is too high, it will be difficult to lift the sliding formwork, and the concrete will crack

If the release strength of slipform concrete is too low or too high, quality accidents and safety accidents are prone to occur

[0003] The existing method measures the penetration resistance by sieving the mortar, and draws the relationship curve between time and penetration resistance. , finding the corresponding time on the graph is the demoulding time. During on-site construction, as long as the concrete reaches the above-mentioned demoulding time, the demoulding can be carried out, because the existing methods cannot truly reflect the strength of the on-site slip-form concrete when demoulding, so The error is large, and quality accidents and safety accidents are prone to occur, so there is a need for a device and method for measuring the demoulding strength of slipform concrete on site

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