JPS62202169A - Method for transporting concrete/mortar - 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 (a) Industrial Utilization The present invention relates to a method for transporting concrete mortar, which is used to transport concrete mortar in particulate form.

(b) The prior art applicant disclosed in Japanese Patent Application Laid-Open No. 60-218100 (dry kneading of cement and aggregate in a sub-zero atmosphere, and at that time, micronized ice was put into the cement). Kneading in the air,
The cement that has been dry-wired is similarly put into a formwork in a sub-zero atmosphere, compressed and formed, and then heated to melt the ice mixed into the cement. We are proposing a method of solidifying cement by causing it to react.

(C)0 Problems that the invention attempts to solve In this method,
It is now possible to solidify cement with water at a level equivalent to its theoretical hydration amount, making it possible to manufacture concrete and mortar components with high strength and durability. The question is whether to do so.

In view of the above-mentioned circumstances, the present invention aims to provide a method for transporting concrete and mortar that can efficiently transport concrete in the form of particles.

(d) Means for solving the problem, that is, the present invention involves kneading cement and water in the state of solid particles of water to produce concrete mortar in the state of solid particles; It is configured to transport concrete mortar in a particulate state to a predetermined location along with a carrier gas via a transport pipe.

(e) Operation With the above-described configuration, the present invention operates such that concrete mortar is transported to a predetermined location through a transport pipe by a carrier gas.

(f), Example Examples of the present invention will be specifically described below.

To manufacture concrete and mortar, first add aggregate such as sand to cement in a dry state and dry it. The purpose of this drying is to mix cement and aggregate evenly, and during this drying, ice in the form of solid fine particles is simultaneously thrown into the cement and mixed. This operation is carried out in sub-zero conditions, so that the ice mixed with the cement is mixed as a solid with the cement and other aggregates. The particle size of ice is preferably similar to that of cement, and ice with this particle size is produced by applying ultrasonic vibrations to liquid water to atomize it, and then instantaneously cooling the atomized water. do. Further, the amount of water mixed in as ice is set to about the theoretical hydration amount that hydrates the cement.

In this way, once the drying of fine particulate ice, cement, and aggregate is completed at sub-zero temperatures, the dryed concrete/mortar is used to connect the drying site and the concrete/mortar placement site. Powder is transported under pressure to the pouring site using a carrier gas such as compressed air through a transport pipe laid in the concrete. Since the concrete mortar at this point remains in a solid particle state, it can be transported smoothly through the transport pipe. This transportation may be carried out in a sub-zero atmosphere or, if the casting site is close (that is, if the transportation distance is short), it may be carried out at atmospheric temperature (00C or higher). If it is carried out at atmospheric temperature, there is a possibility that some of the ice in the concrete/mortar will melt and start hydrating with the cement, but even in this case, the concrete/mortar may not be able to be poured during the hydration process. The product arrives at the installation site, is poured into a predetermined placement location, and is allowed to complete hydration at the placement location.

On the other hand, concrete and mortar, which is pumped together with a carrier gas through a transport pipe in a sub-zero atmosphere, is injected into formwork at the pouring site, but since concrete and mortar are still in a dry particle state, they cannot be placed inside the formwork. The pouring will be carried out smoothly. When the concrete mortar that has been poured into the formwork is heated naturally or forcibly,
The ice in concrete and mortar melts and turns into water, which causes a hydration reaction with the surrounding cement and solidifies and hardens.

The ice in concrete and mortar is thoroughly and uniformly mixed with the cement by drying, so that the cement undergoes a sufficient hydration reaction and solidifies with the theoretical hydration amount of water. Note that the above-described heating operation can also be performed in the middle of the transport pipe or on the discharge side of the transport pipe depending on the situation at the site.

Furthermore, in the above embodiment, water is mixed with cement in the form of fine ice particles, but water and cement may be mixed in any form as long as they are mixed in the form of solid particles. Transport via transport pipes is possible.

For example, water encapsulated in microcapsules is poured into cement, the water and cement in the microcapsule state are mixed in the state of solid particles, and the concrete mortar in the state of solid particles is conveyed through a transport pipe with a carrier gas. The microcapsules in the poured concrete and mortar are destroyed by heating or shaking using electromagnetic waves, etc., and the water and cement in the microcapsules are hydrated. It is also possible to do so.

Furthermore, water is impregnated into a water-absorbing polymer in the form of fine particles, and this state is kneaded with cement to obtain concrete mortar in the form of solid particles. After mixing, the concrete/mortar can maintain a solid particle state for a while), and the concrete/mortar in the particle state is transported to the casting site with a carrier gas through a transport pipe, and then poured. It is also possible to use a method in which the water contained in the polymer is discharged by applying pressure or vibration, and the water causes a hydration reaction.

(g) 0 Effects of the Invention As explained above, according to the present invention, cement and water are kneaded in the solid particle state of the water to produce concrete mortar in the solid particle state, and the solid particle state is Since the concrete mortar is transported to a predetermined location along with the transport gas through the transport pipe, the concrete mortar in the form of solid particles can be continuously and efficiently transported.

Claims (1)

[Claims] Cement and water are kneaded in the form of solid water particles to produce concrete/mortar in the form of solid particles, and the concrete/mortar in the form of solid particles is conveyed together with a carrier gas through a transport pipe. A method of transporting concrete and mortar configured to be transported to a designated location.