Control method for preparing concrete by completely using machine-made sand
A control method and machine-made sand technology, applied in the direction of mixing operation control, mixing operation control device, chemical instrument and method, etc., can solve problems such as poor pumping performance, improve pumping performance, avoid hidden dangers in engineering quality, and protect ecology environmental effects
Inactive Publication Date: 2020-12-01
青州中联水泥有限公司
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a control method for concrete preparation using all machine-made sand, which solves the problems of segregation, bleeding, and poor pumping performance that are easy to occur when all machine-made sand is used to prepare concrete, and realizes the preparation of all machine-made sand concrete
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[0026] Below in conjunction with embodiment, further set forth the present invention. In the following detailed description, certain exemplary embodiments of the invention are described by way of illustration only. Needless to say, those skilled in the art would realize that the described embodiments can be modified in various different ways, all without departing from the spirit and scope of the present invention. Accordingly, the description is illustrative in nature and not intended to limit the scope of the claims.
[0027] Realize the technology of using machine-made sand to prepare concrete, and focus on solving the problems of concrete segregation, bleeding and poor pumping performance. The root cause is that the machine-made sand has poor shape, sharp edges and corners, poor particle gradation, a small proportion of fine powder, and coarse fineness modulus. Therefore in order to solve the above problems, the present invention will analyze respectively from four aspec...
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Abstract
The invention discloses a control method for preparing concrete by completely using machine-made sand. The control method comprises the following steps: 1, optimizing the mixing proportion of each rawmaterial in a mixing scheme, and exploring the optimal sand ratio and the optimal water-binder ratio of each model of concrete; 2, adjusting the powder consumption in the mixing scheme; 3, ensuring the stable quality of the machine-made sand; and 4, strengthening process quality control and fine adjustment of water and additives in the actual production process. According to the technology, the concrete can be prepared by completely using the machine-made sand, and the workability of the concrete specifically comprises obviously improved fluidity, water-retaining performance and pumping performance, so that normal pumping construction of the pumping concrete is realized, and the problems of pump blockage due to segregation and bleeding, difficulty in pumping and the like are solved. Concrete preparing through complete using of the machine-made sand conforms to the industrial policy of vigorously popularizing and using the machine-made sand in China at present, has important social benefits for avoiding excessive exploitation of the river sand and protecting the ecological environment, and has great significance for avoiding concrete quality accidents caused by using inferior riversand and further avoiding hidden danger of engineering quality.
Description
technical field [0001] The invention relates to the technical field of concrete preparation, in particular to a control method for preparing concrete using machine-made sand. Background technique [0002] At present, the fine aggregate in the concrete batching plan of commercial mixing enterprises is mostly river sand or river sand and machine-made sand, and the ratio is about 1:1. However, in recent years, river sand has been over-exploited and used in various regions of the country, and high-grade river sand is rarely used. At present, most of the river sand used by commercial mixing enterprises is weathered sand, which has problems such as large mud content and low strength. After use, the concrete structure entity is generally It has low strength, poor durability, and is prone to hidden dangers in engineering quality. However, due to quality defects such as coarse fineness modulus and poor particle gradation of machine-made sand, it is common to use machine-made sand to...
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IPC IPC(8): B28C7/04C04B28/00C04B18/02
CPCB28C7/0418B28C7/0481C04B28/00C04B2111/00146C04B2111/00991C04B14/02
Inventor 李保明徐明于光民王国杰刘永杰
Owner 青州中联水泥有限公司