Concrete test piece and device for testing and evaluating self-curing capacity for water seepage of crack, and test and evaluation method

Abstract

The invention discloses a concrete test piece and a device for testing and evaluating the self-curing capacity for water seepage of a crack, and a test and evaluation method. The concrete test piece comprises a test piece body and a crack ejecting device, wherein the test piece body is cylindrical; the crack ejecting device comprises a wedge-shaped body arranged at the top end of the test piece body; the pointed end of the wedge-shaped body is embedded into the test piece body, to form a top pressing end; the upper end of the wedge-shaped body is exposed out of the test piece body, to form a pressure applying end; the test and evaluation device comprises a water pressure container, a pressure test pipe and a water blocking tank; the water pressure container is cylindrically barrel-shaped; the pressure test pipe is communicated with the water pressure container and the water storage tank respectively. The concrete test piece and the device are simple in structure, convenient to manufacture, easy and feasible, and can be conveniently used for testing and evaluating the self-curing capacity for water seepage of the concrete crack. The test and evaluation method is simple in process and high in practicability, and can provide an accurate evaluation and judgment basis for the anti-seepage effect of a self-curing anti-seepage additive.

Description

technical field [0001] The present invention relates to the technical field of waterproof engineering such as water conservancy and hydropower engineering, municipal engineering, and water engineering, and in particular to a concrete crack automatic healing technology, in particular to a concrete test piece for testing and evaluating crack water seepage and self-healing ability, an evaluation device and a concrete test piece using the concrete test piece. The method for evaluating the software and the evaluation device. Background technique [0002] Hydraulic concrete structures generally have the function of retaining water or work underwater, such as concrete dams, sluices, water tunnels, aqueducts, waterproof underground works of municipal engineering, etc. Cracks are a common disease of concrete structures. Cracks often appear in the hydraulic concrete projects mentioned above. After cracks appear, water leakage or seepage often occurs along the cracks. Water leakage wil...

AI Technical Summary

Problems solved by technology

When cracks occur and water seeps into the cracks, calcium is precipitated in the concrete, and the active substance in the anti-seepage admixture chemically reacts with the precipitated calcium to form crystals, blocking the anti-seepage channel, thereby achieving the purpose of anti-seepage; therefore This admixture is a kind of crack self-healing active admixture (such as Xilikang), and the crack self-healing ability of this self-healing admixture currently lacks effective testing and evaluation means

[0004] If the market does not have detection methods and means for admixtures, it is difficult to supervise the products by relying on merchants or theoretical and experimental data. If unscrupulous manufacturers use inferior raw materials to produce, the admixtures are applied to large barrages and other places. Waiting for an accident to rectify, the consequences will be unimaginable

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