JPS62197539A - Method for casting construction member - 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 Application Field The present invention is a method for forming construction members such as columns and beams using formwork members manufactured from cementite containing water at a theoretical hydration level. The present invention relates to a method of pouring a construction member.

(b) The prior art applicant disclosed in Japanese Patent Application Laid-open No. 60-218100 that cement and aggregate were mixed in air in a sub-zero atmosphere, and at that time, micronized ice was poured 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 becomes 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 high durability. Therefore, the future challenge is how to apply and utilize concrete and mortar components manufactured by this method.

In view of the above-mentioned circumstances, the present invention provides a construction member in which concrete and mortar members made of cement solidified with water at a theoretical hydration level can be used for pouring construction members such as columns and beams. The purpose of this project is to provide a method for placing concrete.

(d) Means for solving the zero problem, that is, the present invention manufactures a formwork member (2) having a concrete/mortar casting space (2a) using cement containing water at a theoretical hydration level. , pour concrete mortar (7) into the concrete/mortar casting space (2a), and pour the construction member (1) using the formwork member (2) and the poured concrete/nirkle. Configured to build.

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description should not be limited to the descriptions in the drawings. The following r (el
The same applies to the column ``, action''.

(C) 0 effect With the above-described configuration, the present invention provides that the formwork member (2) having high strength and high durability manufactured from cement containing approximately the theoretical hydration amount is the construction member (1). It acts as if it were used as a disposable formwork.

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a sectional view showing an example of a column to which the construction member casting method according to the present invention is applied.

As shown in FIG. 1, the pillar 1, which is a construction member, has a mold member 2 that forms the outer shape of the pillar 1, and the mold member 2 is formed into a cylindrical shape in a direction perpendicular to the plane of the drawing. ing. Formwork member 2
, a plurality of main reinforcements 3 of a column 1 are erected in a direction perpendicular to the plane of the paper in the figure, and hoop reinforcements 5 are provided between each main reinforcement 3 to connect the main reinforcements 3. Inside the formwork member 2, a concrete/mortar casting space 2a with a circular cross section is formed in a cylindrical shape in a direction perpendicular to the plane of the drawing. It is poured and filled.

Since the pillar 1 has the above-mentioned configuration, when constructing the pillar 1, it is first necessary to manufacture the formwork member 2. An example of the manufacturing method will be described below.

That is, when manufacturing the formwork member 2, it is first necessary to knead cement for manufacturing the formwork member 2. To mix cement, first add aggregate such as sand to the cement in a dry state and dry mix it. The purpose of this drying is to mix cement and aggregate evenly, and during this drying, ice in the form of 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.

In this way, when drying of fine particle ice, cement, and aggregate at below freezing point is completed, main reinforcing bars 3 etc. are placed on the drying cement in a sub-zero atmosphere, and four corners are placed. The mold is placed in a cylindrical mold 6, and in this state, the mold 6 is rotated at high speed around the center of gravity G of the mold using a rotation drive means. Then, the mixture of cement, ice, and aggregate in the formwork 6 is compression-molded by the centrifugal force accompanying the rotation, forming the formwork member 2 in which a cylindrical concrete/mortar casting space 2a is formed. .

At this time, even if there are reinforcing bars such as main reinforcement 3 in the formwork, the formwork 6
Pressure forming of the concrete inside is performed smoothly by centrifugal force.

In this way, the formwork member 2 has been compressed and formed by centrifugal force.
When the cement is forcibly or naturally heated, the ice in the compressed cement melts and becomes water, which causes a hydration reaction with the surrounding concrete and solidifies, completing the creation of the formwork member 2. Since the ice in the cement is thoroughly and uniformly mixed with the cement by the dry grinding, the cement with water at the level of theoretical hydration causes a sufficient hydration reaction and hardens.

Therefore, the amount of water mixed into cement as ice is approximately the theoretical hydration amount.

In this way, when the formwork member 2 is manufactured in a factory or the like using cement containing water equivalent to the theoretical hydration amount, the manufactured formwork member 2 is transported to the construction site of the column 1, and then further 1 at the location where it should be constructed. Next, when concrete mortar 7 is cast in the concrete mortar casting space 2a in the installed formwork member 2, the formwork member 2 acts as a sacrificial formwork, and the formwork member 2 and concrete·
The column 1 is constructed with concrete mortar 7 placed in the mortar placement space 2a.

In addition, although the above-mentioned example described the case where this invention was applied to the construction of the pillar 1, this invention is not limited to the construction of the pillar 1,
Of course, the present invention can be applied to any construction member such as a beam or other construction member that can be constructed using the formwork member 2. Furthermore, the formwork member 2 does not have to have a closed cross-sectional shape as shown in FIG. It may have any shape such as cross-sectional shape.

Furthermore, regarding the manner in which water is mixed with the cementite when constructing the formwork member 2, in addition to mixing water in the form of fine ice particles as in this example, water is encapsulated in microcapsules. kneading with Shichimeni in the form of a mold, heating or shaking the microcapsules to destroy them after compression molding the mold member 2, and hydrating the water and cement in the microcapsules;
It is also possible to configure the formwork member 2 to be manufactured.

Furthermore, water is impregnated into a water-absorbing polymer in the form of fine particles, and mixed with cement in that state to obtain concrete mortar in the form of particles. After mixing, concrete and mortar can maintain their particle state for a while).
It is also possible to form the formwork member 2 by putting the concrete mortar in the form of particles into the formwork 6.

Furthermore, it is of course possible to place the concrete 1...mortar 7 with reinforcing members such as reinforcing bars placed in the concrete placement space 2a.

(g) 6 Effects of the Invention As explained above, according to the present invention, the formwork member 2 having the concrete/mortar casting space 2a is manufactured using cement containing water in a theoretical hydration amount. Then, concrete and mortar is cast and filled in the concrete and mortar casting space 2a, and construction members such as columns 1 and beams are cast and constructed using the formwork member 2 and the cast concrete and mortar 7. Therefore, the formwork member 2, which has high strength and high durability and is manufactured using water at a theoretical hydration level, is used as a waste formwork to cast and construct construction members such as columns and beams. This opens up a wide range of applications for general structures. Further, since the formwork member 2 can be expected to have high strength, the construction member can be easily applied to high-rise buildings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an example of a column to which the construction member casting method according to the present invention is applied. 1...Construction member (column) 2...Formwork member 2a...Concrete/mortar placement space 7.
...Concrete/mortar applicant Mitsui Construction Co., Ltd. agent Patent attorney Phase 1) Shinji (and 1 other person) Drawing, '> Yu (no change in content) Fig. 1 Column 1 No. 71 μMorph 1 March 27, 1985 1, Indication of the case Patent Application No. 39508 of 1988 2, Name of the invention Method of placing construction members 3, Relationship with the person making the amendment case Patent applicant address Chiyoda-ku, Tokyo 3-10-1 Iwamotocho Name: Mitsui Construction Co., Ltd. Representative Ryoji Machida 4, Agent

Claims (1)

[Claims] A formwork member having a space for placing concrete and mortar is manufactured using cement containing water at a theoretical hydration level, and the space for placing concrete and mortar is poured and filled. , a method for pouring a construction member, comprising: constructing the construction member by pouring and constructing the construction member using the formwork member and the poured concrete/mortar.