Real-time monitoring device of concrete capillary water absorption rate under load

Abstract

The invention belongs to the concrete material durability monitoring equipment technology field and especially relates to the real-time monitoring device of a concrete capillary water absorption rateunder a load. The main body structure comprises a concrete test piece, a left steel plate, a right steel plate, a preformed hole, a threaded rod, a spring, a pull nut, a pressing nut, a suction box, asealing ring, a cover plate, a number one high strength bolt, a number two high strength bolt, a water injection pipe, a water injection valve , a water supply tank, a water outlet pipe, a silicone hose, a water storage tank, an air pressure balance hole, a mass sensor, a multi-channel data collector, a computer and a strain gauge. Force transmission is performed among the right steel plate, thepull nut and the pressing nut through a spring, and the mass sensor is connected with the computer. The mass reduction amount of the water storage tank and the change rule of time can be transmitted to the computer in real time and a concrete test piece cumulative water absorption curve can be drawn in real time. The capillary water absorption of a concrete test piece is tested continuously in real time, and the high-precision measurement requirements of the capillary water absorption of the concrete test piece under different loads can be realized.

Description

Technical field: [0001] The invention belongs to the technical field of concrete material durability monitoring equipment, and in particular relates to a real-time monitoring device for capillary water absorption of concrete under sustained load. Background technique: [0002] Concrete is a multi-phase and multi-scale heterogeneous material. During the service process, external aggressive ions enter the interior of the concrete through various forms such as diffusion, infiltration, and migration. The continuous path formed by the internal pores and micro-cracks will Accelerate the intrusion of medium, and the external load will cause the formation and development of the internal pore structure and cracks in the concrete, which makes the deterioration mechanism of concrete under the coupling effect of load and environment more complicated. The alternation of the two phases will cause the internal expansion stress of the concrete to increase the number of new micro-cracks, the...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem existing in the prior art that it is difficult to realize the coupling process of concrete applying continuous load and capillary water absorption, and it is impossible to carry out real-time and continuous monitoring of the water absorption of the specimen, and to develop a real-time capillary water absorption rate of concrete under sustained load. monitoring device

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