JPS6117460A - Manufacture of concrete - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Object of the Invention (Field of Industrial Application) The present invention relates to an improvement in a method for producing concrete that is widely used in various buildings, structures, civil engineering construction, etc.

(Prior art) Plasticizers, so-called water-reducing agents, in concrete production are
It is usually composed of melamine sulfonic acid formaldehyde or naphthalene sulfonic acid formaldehyde, etc., and has the effect of increasing the hydration of the surface of cement particles and increasing the amount of slump. Therefore, cement can be kneaded with less water and the unit water volume can be reduced, so there is less shrinkage after pouring, and phenomena such as cracks are extremely reduced, resulting in improved watertightness and durability. However, conventionally, this fluidizing agent had to be added and kneaded at the construction site, or it had to be added afterward, such as by adding it to the mixer of a mixer truck. I didn't get it.

(Problem to be solved by the invention) As mentioned above,
Glidants were mixed at the construction site or after being added to the mixer in the mixer truck, but in addition to the mixing work at the construction site, the stirring in the mixer truck was performed to prevent the concrete from hardening in the mixer tank. are the main ones, and the original mixing effect cannot be expected, and the uniform dispersion effect of the fluidizing agent is not exhibited, and therefore, the above-mentioned excellent effects inherent to the fluidizing agent cannot be fully exhibited.

In addition, in conventional plant mixers, the degree of concrete adhesion to the mixer blades and tank is extremely high, and it requires a great deal of effort and effort to dispose of and clean it, and it is extremely difficult for people to enter the mixer to clean it. This is dangerous, and if thorough cleaning is not possible, it will affect the stirring operation, so a solution has been awaited.

(2) Structure of the invention (Means for resolving the problem IN!) The above problems are achieved by a concrete manufacturing method characterized by adding and kneading a fluidizing agent every time during the concrete manufacturing process in a plant mixer. This is what I am trying to do.

(Example) In the present invention, which has a unique idea when adding a fluidizing agent, the fluidizing agent has almost the same effect in any case as long as it is added during the concrete manufacturing process in the plant mix. It is something that can be demonstrated.

One example is an example in which it is added to a mixer and kneaded together with sand, cement, and water. In another embodiment, when gravel is added to the mortar, it is added and kneaded together with the gravel. Still another embodiment is an embodiment in which sand, cement, water, etc. are kneaded and added to the kneaded mortar and kneaded.

(3) Effects of the Invention According to the present invention, since the fluidizing agent is added and kneaded during the concrete production process in a plant mixer with a high stirring effect, there is a means of post-addition such as addition to the mixer in a mixer truck. Unlike conventional plasticizers, superplasticizers are dispersed and mixed extremely uniformly, so they can increase the hydration of the surface of cement particles and increase the amount of slump. can be manufactured.

In addition, the plant mixer has a high fluidization property because it mixes with a fluidizing agent added, and therefore, the degree of concrete adhesion to the Miki tank and blades is weak, and therefore, even when cleaning after concrete production, etc. It can be sufficiently washed away by pouring water on it, and has many useful effects, such as eliminating the need for dangerous work such as having a person enter the mixer to clean it.

Claims (1)

[Claims] 1) A method for producing concrete, which comprises adding and kneading a fluidizing agent during the concrete production process in a plant mixer. 2) The fluidizing agent in claim 1 refers to cement during the concrete production process in a plant mixer,
A method for producing concrete, characterized in that it is added to a mixer together with aggregate, water, etc. and kneaded. 3) A method for manufacturing concrete, characterized in that the fluidizing agent according to claim 1 is added and kneaded together with gravel at the time of inputting gravel into the mixer during the concrete manufacturing process in a plant mixer. 4) A method for producing concrete, characterized in that the fluidizing agent according to claim 1 is added to kneaded mortar during the concrete production process in a plant mixer and mixed together with gravel.