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A technology of concrete and fluidity, applied in the direction of flow characteristics, measuring devices, instruments, etc., can solve the problems of long experiment period, unsuitable application, complicated operation, etc., and achieve the effect of simple structure and flexible and convenient use.
Inactive Publication Date: 2009-12-23
CHINA FIRST HIGHWAY ENG CO LTD
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[0003] The purpose of the present invention is to provide a new concrete fluidity testing device to solve the problems of complex operation, long experiment period, high cost, large influence factors of human error, and unsuitability for application in actual engineering in the existing concrete fluidity testing device. Measuring instrument
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specific Embodiment approach 1
[0007] Specific implementation mode one: (see Figure 1 to Figure 5 ) This embodiment consists of a housing 1, an upper cover 2, a piston 3, a rack 4, a sealing ring 5, a screw 6, a gasket 7, a nut 8, a handle 9, a gear 10, a gear shaft 11, a bushing 12, and a backing plate 13 , a sleeve 14, a sliding pin 17 and a handle cover 18, a circular through hole 1-2 is opened on the wall of the lower side of the shell 1, a fan-shaped groove 1-4 is opened in the top of the shell 1, and a backing plate 13 is provided with Sector-shaped tenon 13-2, backing plate 13 is set in the top of the shell 1, the sector-shaped tenon 13-2 on the backing plate 13 matches the fan-shaped groove 1-4 on the shell 1, and the center of the backing plate 13 has a sliding hole 13-1, the rack 4 is arranged on the upper side of the casing 1, the piston 3 is arranged on the lower side of the casing 1, the lower end of the rack 4 is fixedly connected to the upper end of the screw 6, and the lower end of the scre...
specific Embodiment approach 2
[0008] Specific implementation mode two: (see figure 1 , figure 2 ) The bottom end of the housing 1 in this embodiment is an inverted cone 1-1. The setting of the inverted cone is convenient for use, and the others are the same as the first embodiment.
specific Embodiment approach 3
[0009] Specific implementation mode three: (see figure 1 , Figure 4 ) In this embodiment, a strip-shaped through-hole 1-3 is opened between every two rows of circular through-holes 1-2 on the lower wall of the housing 1 . The elongated through holes 1-3 are conducive to the suction of concrete, and the others are the same as in the second embodiment.
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Abstract
A novel measuring instrument for the mobility of mixing concrete relates to a concrete measuring instrument. Aimed at the detects of the existing detecting method for the working performance of the concrete, the invention provides the novel measuring instrument for the mobility of mixing concrete for meeting the demands of accurately, simply, conveniently and fast detecting the mobility of the concrete in an actual project. A round through hole is arranged on a wall at the lower side of the shell of the invention; the lower end of a rack is fixedly connected with the upper end of a screw; the lower end of the screw is connected with a piston by thread; a gear is engaged with the rack; the rack is matched with the slide hole of a backing plate; a slide pin is fixed on the outer wall of the shell; a sleeve is provided with a through coaxial slot; the upper end of the coaxial slot is provided with an upper horizontal slot; the lower end of the coaxial slot is provided with a lower horizontal slot. The novel measuring instrument has the beneficial effects that: the measuring instrument has a simple structure, is flexibly and conveniently used and can fast and accurately measure the mobility of the concrete; besides, the measured data can scientifically estimate the flow properties of the concrete.
Description
technical field [0001] The invention relates to a concrete fluidity measuring instrument. Background technique [0002] At present, there are many kinds of instruments for evaluating the fluidity of concrete, such as the most common slump method, which evaluates the workability of concrete by measuring the slump value and slump expansion of concrete, and the L-shaped flow meter method, Orimet flow meter method, V-shaped funnel method, U-shaped filling test, J-shaped flow meter test, VSI method and slump method and other detection methods. Analysis and comparison of the existing detection methods found that there are many deficiencies. For example, the slump test is not sensitive enough for high fluidity self-compacting concrete, which generally changes within the range of 24-29cm. For example, the VSI method lacks accurate standards and largely depends on the experience of the tester, which is highly subjective and difficult to control. The disadvantage of the V-shaped fun...
Claims
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Application Information
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