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Production method for concrete

A manufacturing method and concrete technology, which is applied to clay preparation devices, chemical instruments and methods, mixers, etc., can solve the problems of increasing or decreasing the degree of freedom of concrete, and achieve the effect of increasing the degree of freedom and reducing manufacturing costs

Active Publication Date: 2015-03-25
AIZAWA CONCRETE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Concrete must be poured within a specified time after manufacture, but if the setting and hardening time can be adjusted, there will be fewer restrictions on time, and the degree of freedom in the manufacture and handling of concrete will increase

Method used

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  • Production method for concrete
  • Production method for concrete
  • Production method for concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In the following experiments, it was confirmed that the concrete production method of the present invention can control the setting and hardening, and that the setting retarding effect of the retarder can be released by the physical action caused by mixing.

[0029] (1) General conditions

[0030] When various conditions are changed to produce concrete, the conditions are common for materials other than retarders. That is, the materials used and their ratios are constant as shown below.

[0031] [Table 1]

[0032]

mixed water

cement

fine aggregate

Coarse aggregate

AE superplasticizer

AE additives

Concrete 1m 3 Material weight (kg)

167

361

889

937

3.61

0.014

[0033] Note) Surface water is not included in the weight of aggregate.

[0034] [Table 2]

[0035]

mixed water

cement

fine aggregate

Coarse aggregate

AE superplasticizer

AE additives

Material...

Embodiment 2

[0066] The mixing time required to produce concrete varies greatly depending on the type of mixing device. Then, the following experiments were conducted, in which it was confirmed that the effect of the present invention was obtained even when the type of the mixing device was changed and the time of the concrete mixing step was changed.

[0067] (1) General conditions

[0068] When various conditions are changed to manufacture concrete, the materials and ratios to be used are constant, as described below.

[0069] [Table 4]

[0070]

mixed water

cement

fine aggregate

Coarse aggregate

AE superplasticizer

AE additives

Concrete 1m 3 Material weight (kg)

167

361

831

1023

3.61

0.0325

[0071] Note) Surface water is not included in the weight of aggregate.

[0072] [table 5]

[0073]

mixed water

cement

fine aggregate

Coarse aggregate

AE superplasticizer

AE additives...

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PUM

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Abstract

To provide a low-cost production method for concrete in which setting and hardening are appropriately controlled and there is a high degree of freedom in production and handling. This concrete production method is configured from a cement paste mixing step and a concrete mixing step. In the cement paste mixing step, cement, mixing water, and a retardant are mixed together to obtain a cement paste. As a result, setting and hardening of the cement paste are inhibited, and it is possible to store the cement paste for a predetermined length of time. In the concrete mixing step, an aggregate is mixed into the cement paste in order to obtain concrete. This mixing cancels the setting retardation effect of the retardant.

Description

technical field [0001] The invention relates to a production method of concrete which is added with retarder to control setting time. Background technique [0002] Concrete is manufactured by putting gravel, sand, cement, mixing water, etc. measured according to a prescribed ratio into a mixer, and mixing for a prescribed time. In the concrete manufactured like this, various admixtures are added according to the purpose. For example, water reducing agent can reduce mixed water while ensuring fluidity; separation reducing agent can reduce the amount of bleeding. When it is intended to control the setting and hardening time of concrete, a retarder to delay setting and hardening and an accelerator to accelerate hardening are added. Concrete must be poured within a specified time after manufacture, but if the setting and hardening time can be adjusted, there will be fewer restrictions on time, and the degree of freedom in the manufacture and handling of concrete will increase....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28C7/02B01F23/57
CPCB28C5/003C04B40/06C04B40/0028C04B14/02C04B28/02C04B2103/20B01F23/57B01F23/511B01F33/80B01F33/834B01F2101/28
Inventor 中村圣二酒井亨青木凉
Owner AIZAWA CONCRETE CORP
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