Chemically optimized fiber concrete ring type constrained cracking device

Abstract

The present invention discloses a chemically optimized fiber concrete ring type constrained cracking device. The chemically optimized fiber concrete ring type constrained cracking device comprises a ring type constrained cracking device, an OH-semipermeable membrane, and a curing container. The ring type constrained cracking device is composed of two concentric rings and is provided with a steel bottom plate on the bottom; the outer ring of the two concentric rings is two semi-circular plastic templates integrally connected by using two bolts; and the inner ring is a steel ring, and the innerside of the inner ring is divided into four equal parts affixed with strain gauges. The OH-semipermeable membrane is sleeved outside the outer ring and tightly wraps the outer ring surface. A NaOH solution of 0.08 mol / L is in the curing container. According to the technical scheme of the present invention, the high-strength fiber concrete is induced by chemical weakening to be cracked under the constrains, so that the time of the anti-crack performance test can be reduced; the cracking time can be accurately determined by using the strain gauge, so that problems that the traditional concrete crack anti-crack test device has a long time in tests and is difficult to monitor the crack are solved; and the concrete crack anti-crack test device is fully optimized to improve the efficiency and applicability of the anti-crack test device.

Description

technical field [0001] The invention relates to the field of measuring the crack resistance of concrete, in particular to an optimized concrete ring restraint cracking device for measuring the crack resistance. Background technique [0002] The current concrete material is the most widely used engineering composite material in construction engineering. Cracks will inevitably occur during the service of concrete, and provide channels for harmful ions and substances to enter the concrete, thereby corroding the steel bars and weakening the bearing capacity and durability of the concrete structure. , so to correctly detect and evaluate the crack resistance of concrete is the premise of reducing or avoiding the cracking of concrete structure. At present, the confinement ring method using a ring-type confinement cracking device is currently recognized as a standard method for evaluating the crack resistance of concrete at home and abroad. However, the constrained circle method ha...

AI Technical Summary

Problems solved by technology

However, when the ordinary ring-type restraint cracking device is used to measure the crack resistance of fiber-reinforced concrete, due to its strong crack resistance, it is difficult to shrink and crack, resulting in a long test period of the crack resistance test, high randomness and chance, and it is impossible to correctly evaluate its crack resistance.

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