Portable concrete slump test device for municipal road engineering

Abstract

The invention belongs to the technical field of municipal roads, and relates to a portable concrete slump testing device for municipal road engineering. The device comprises a bottom plate, two semi-conical cylinders are arranged on the bottom plate, a mounting base is fixedly connected to the top of the bottom plate and provided with an avoidance groove, first and second fixing plates are rotatably connected to the inner side of the avoidance groove through a rotating shaft, and the first fixing plate is located at the top of the second fixing plate; the two semi-conical cylinders can rotate,when both cylinders are closed, concrete can be poured in, and then the semi-conical cylinders can be rotated directly to expose and detect the molded concrete. Thus, the structure is simple, the semi-conical cylinders tend not to inclined by means of rotation, a slump cylinder exposes the molded concrete in a more stable way, and the slump cylinder tends not tin influence the concrete shape.

Description

technical field [0001] The invention relates to the technical field of municipal highways, in particular to a portable concrete slump test device for municipal highway engineering. Background technique [0002] Slump mainly refers to the plasticizing performance and pumpability of concrete. The main factors affecting concrete slump are gradation changes, water content, weighing deviation of weighing instruments, the amount of admixtures, and the temperature of cement that is easily overlooked. , the test method generally uses a trumpet-shaped slump barrel with an upper mouth of 100mm, a lower mouth of 200mm, and a height of 300mm, pouring concrete into it and filling it three times. After tamping, smoothing, and then pulling up the barrel, the concrete will slump due to its own weight. The height of the highest point of the concrete after the collapse is subtracted from the height of the barrel (300mm), which is called the slump. If the difference is 10mm, then The slump is...

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Problems solved by technology

[0003] The Chinese patent with the publication number (CN207502531U) discloses a slump test equipment for building concrete. The patented technology is engaged with a rack and a gear plate, the rack fixing frame fixes the direction of the rack, and the handle drives the rotating shaft to rotate. , the rotating shaft drives the gear plate to rotate, so that the rack drives the slump cylinder to move upwards, avoiding the phenomenon that the shape of the concrete is affected when the slump cylinder is lifted, resulting in inaccurate measurement, but this method realizes the slump through the cooperation of various parts For the lifting of the slump cylinder, the accuracy of multiple parts will decrease under long-term use. Therefore, it is necessary to regularly check multiple parts. If the verticality of the lifting is not accurate, the slump cylinder will tilt when it is raised and lowered. , directly affects the shape of the concrete, therefore, those skilled in the art provide a portable concrete slump test device for municipal highway engineering, to solve the problems raised in the above-mentioned background technology

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