A Proportioning Method of Compact Concrete

Abstract

The invention discloses a method for mixing dense concrete, which comprises the following steps: (1) initially determining the net slurry and measuring the density; (2) determining the coarse aggregate and its dosage; (3) determining the fine aggregate and its dosage; (4) ) Determine the amount of net slurry and the preliminary benchmark mix ratio; (5) Trial mix and check the benchmark mix ratio based on workability; (6) Determine the production mix ratio and try to mix and test. The technical scheme of this application is based on the proportion of coarse aggregate, fine aggregate and net slurry volume, fully based on the fluctuation of raw materials, the influence of production and construction links, local materials, based on the actual raw material detection data, and avoiding the use of empirical data Breaking away from reality, it can make dense concrete develop towards lightweight and multi-functional, environmental protection and energy saving, reduce engineering costs and better seismic performance, and at the same time achieve the effects of quality control, cost reduction, and resource conservation.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for mixing dense concrete. Background technique [0002] Dense concrete is a kind of concrete that leaves no voids or air inside the concrete structure, mainly including ordinary concrete, high-strength concrete, high-performance concrete, impermeable concrete, etc. At present, the dense concrete is basically designed according to the current "General Concrete Mixing Ratio Design Regulations" (JGJ55-2011). The design principle is: the strength of concrete products is mainly based on the water-cement (ash) ratio to determine the strength of concrete. According to the statistical data, it is assumed that the bulk density of the concrete is prepared by one side, and the preliminary amount of each raw material is adjusted according to the volume error; the initial determination of the amount of raw materials: the water consumption of the single side concrete is se...

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Problems solved by technology

[0005] 1. At present, the requirements of marketization are getting higher and higher, the market competition is becoming more and more fierce, and quality and cost control are becoming more and more important. However, the current mixing ratio method of dense concrete still stays on the basis of ideal raw materials, and the setting of bulk density restricts concrete to light Developing in the direction of quality, the mix ratio of dense concrete is mainly determined based on empirical statistics, which leads to a large gap between the mix ratio of concrete in use and raw materials. In addition, there are many influencing factors in production and construction, resulting in concrete quality, technology and cost control. "Machine, material" has a huge impact

[0006] 2. Due to the simplicity and idealization of the current dense concrete mix ratio method, it is necessary to rely on technicians to summarize and improve through multiple experiments and practices, and invest a lot of energy and manpower. Due to the different conditions of raw materials and specific production and construction links in various regions, the level of technical personnel is different , many empirical methods of mixing ratios have been produced from practice, all of which have certain innovative aspects and principles, but basically have limitations and lack of promotion

[0008] 4. The range of empirical parameters of the current proportioning method is too large and too much, which is separated from the actual situation of raw materials and the production process, resulting in large adjustments in the later stage, large fluctuations in quality, and the comprehensive cost of concrete is too high or the difference is large and difficult to control. How to proceed scientifically and rationally Concrete ratio is an urgent technical problem to be solved

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