Concrete pumping full simulation test device and detection method

Abstract

The invention relates to a concrete pumping whole-course simulation test device and a detection method, and belongs to the technical field of concrete pumping performance measurement, and aims to conveniently evaluate the concrete pumping performance by simulating the flow of a concrete mixture in different pump pipe units, measuring the resistance of concrete in a pump pipe and calculate the whole-course pressure-flow relationship of the pump pipe. The device comprises a plurality of simulation units, wherein each simulation unit comprises a bent pipe simulation unit and a straight pipe simulation unit, the simulation unit is internally provided with two quasi-rigid chains, the mutually approaching end parts of the two quasi-rigid chains are respectively provided with pistons in a matchedmode, the outer end faces of the two pistons are provided with a concrete sample therebetween, the free ends of the quasi-rigid chains are connected with an external power device I and an external power device II through rigid straight rods, and the quasi-rigid chains and the pistons can slide in the axial direction of the inner wall of the simulation unit under the action of an external force. According to the method, the pressure loss in the whole pumping process is calculated by measuring the flow resistance of concrete in different pump pipe units.

Description

technical field [0001] The invention relates to the technical field of concrete mixture pumping performance measurement, in particular to a concrete pumping whole process simulation test device and method. Background technique [0002] In the field of construction engineering, the delivery of concrete mixture is an important link in the construction of the main structure. For example, self-compacting concrete has been widely used in super high-rise buildings, and concrete is efficiently conveyed through advanced pumping equipment for pouring. In the process of formulating and implementing the concrete pumping construction plan, it is an important content to pre-evaluate the pumping performance (usually expressed as the relationship between the pumping flow rate and the total pressure loss). According to the current industry standard, the calculation formula of pumping pressure loss is derived from the empirical formula based on slump index proposed by Morinaga in 1973; with...

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Problems solved by technology

Use real pumping equipment and pipelines, such as horizontal coil full-length tests, which are obviously the closest to real pumping conditions, but the cost is too high

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