Determination method of bus of arc-shaped wall of slump cone based on iteration method
A method for determining the slump value, which can be used in instruments, calculations, electrical and digital data processing, etc.
Active Publication Date: 2016-10-12
南京弘正建设发展有限公司
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Problems solved by technology
[0004] In view of the above existing problems, the present invention aims to provide a method for determining the generatrix of the arc-shaped wall of the slump cylinder based on the iterative method, aiming at the problem that the slump value of the existing standard slump cylinder is affected by uncertain factors , analyze the force of concrete when lifting the slump cylinder, and then improve the wall curve of the standard slump cylinder based on reducing the influence of friction
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Embodiment
[0040] Embodiment: refer to attached Figure 1-5 The method for determining the generatrix of the arc-shaped wall of the slump cylinder based on the iterative method shown is aimed at reducing the influence of the inhomogeneity of the concrete material and the unskilled manual operation on the measured value of the slump by reducing the friction force. Invention ideas are introduced in detail:
[0041] (1) In order to study the influence of the angle between the generatrix of the wall of the slump wall and its plane projection on the friction force of the concrete, a model in which the diameter of the lower surface of the bottom of the tube is constant and the included angle is an independent variable is considered.
[0042] like figure 1 , now take the whole concrete as the force object to carry out the force analysis, and list the balance equation
[0043] s is the contact area;
[0044] Let s=1, f=G / (sinα-cosα / μ) after simplification;
[0045] Take the reciprocal of b...
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The invention discloses a determination method of a bus of an arc -shaped wall of a slump cone based on an iteration method, aims at reducing influences from non-uniformity of a concrete material and unskilled manual operation to a slump measuring value through reducing friction force, and provides a corresponding mechanical model and a function curve computing method about the model, a point-taking method and a specifically determined method steps of a cylindrical wall bus function in a later period. The novel slump cone has the beneficial effects that as the determination method proceeds from contradictions of a system per se rather than introducing other parameters from the exterior of the system, the influences from the non-uniformity of the concrete and the unskilled manual operation to the slump measuring value can be reduced by reducing the friction force based on the fluctuation of the friction force, and the slump value measured in scientific research and a construction site can be more accurate.
Description
technical field [0001] The invention relates to the field of measuring instruments for material properties of civil engineering materials, in particular to a method for determining the generatrix of a curved wall of a slump cylinder based on an iterative method. Background technique [0002] Concrete slump mainly refers to the plasticizing performance and pumpability of concrete, and specifically refers to the measured value of the fluidity of the concrete mixture when the plasticity and water retention meet the requirements. Therefore, it can also be said that the size of the slump value reflects the workability of concrete. The workability of concrete is the performance of whether the concrete is easy to construct and operate and is uniform and dense. It is a very comprehensive performance which includes fluidity, cohesion and water retention. At present, the workability is usually expressed by measuring the slump and consistency. The test method adopted is: use a trumpet...
Claims
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Login to View More IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 庞汉松何培玲陆韬张伟伟范杰钮逸珺
Owner 南京弘正建设发展有限公司