JPH022001A - Apparatus for preparing concrete product - Google Patents

Abstract

PURPOSE:To inexpensively provide a concrete product of high quality by making the early drying and premature cure of cement paste possible by a retaining mold apparatus itself. CONSTITUTION:Each of bottom plate 11 and side boards 12 of a retaining mold apparatus 10 is made by covering both surfaces of a thick heat insulating material with cover members 15, 15 such as metal members and the side boards 12... are erected on the bottom plate 11 in an almost square shape to form a framework. A top plate 16 prepared by covering both surfaces of thick heat-insulating material 14 with the cover members 15, 15 is placed on the upper part of the retaining mold unit 13 of the uppermost stage to hermetically close the retaining mold unit 13. The retaining mold units 13 each having cement paste or mortar 1 cast thereon are stacked in four stages and the top plate 16is placed on the upper part of the retaining mold unit 13 of the uppermost stage to hermetically close the units 13. By this method, the paste or mortar 1 is thermally insulated for about 3hr at about 50 deg.C and the temp. thereof becomes about 60 deg.C within 6hr by the action of a heat generating additive 9 and the generation of heat of hydration reaction and this high temp. state is held in the heat-insulated retaining mold units 13 for a long time and, thereafter, demolding becomes possible.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for producing concrete products such as concrete plates and concrete blocks, and in particular, the present invention relates to an apparatus for producing concrete products such as concrete plates and concrete blocks. The present invention relates to a formwork device for drying and hardening manufacturing.

[Prior art] Conventionally, when producing concrete products such as concrete plates and concrete blocks quickly and in large quantities, expensive early-strengthening cements have been used as cement materials, or drying and curing of cement paste has been required. An insulating room, steam room, or high-pressure steam room, etc. is installed in which the temperature is raised using electrical energy or fire, and the cement paste poured into the specified formwork is stored in the insulating room to allow early hardening and hardening. It was intended to increase strength.

However, in order to install such a heating room, a steam room, a high-pressure steam room, etc. that use electrical energy or fire to raise the temperature, there is a problem in that they all require a huge amount of expense and area. was there.

[Purpose of the Invention] The present invention was devised in view of the above-mentioned problems and problems in the prior art, and is a method that uses electric energy or fire, etc., as in the conventional insulating room, steam room, or high-pressure steam room. This makes it easy to dry and harden the cement paste early, mainly in the formwork equipment itself, without using it, and because it does not require huge amounts of equipment or area for that equipment, it can lead to high-quality products. The object of the present invention is to provide a concrete product manufacturing apparatus that can provide concrete products at low prices.

[Structure of the Invention] The concrete product manufacturing apparatus according to the present invention comprises at least a cement paste produced by mixing and kneading cement and hot water at 40°C to 75°C, and an exothermic additive that is added to the cement paste to generate heat. and a formwork device into which cement paste is introduced, and the formwork device includes a bottom plate formed by covering both sides of a heat-retaining and insulating material with a covering member, and a bottom plate that stands up above the outer periphery of the bottom plate. The formwork units are stacked in multiple tiers, each consisting of a frame and an end board formed by covering both sides of the heat-retaining and insulating material with a covering material. The formwork unit is characterized by placing a top plate formed by molding and sealing the inside of the formwork unit, or at least a cement paste produced by mixing and kneading cement and warm water at a temperature of 40°C to 75°C; A heat-generating additive that is added to cement paste to generate heat; and a molding device into which the cement paste is introduced, the molding device comprising a bottom plate formed by covering both sides of a heat-insulating material with a covering member; The end board is constructed by standing up above the outer periphery of the bottom board, and is formed by covering the heat-retaining insulation material with covering members from both sides. Formwork units made up of partition plates are stacked in multiple tiers, and a top plate formed by covering both sides of the heat-insulating material with a covering material is placed on top of the top formwork unit, which is then sealed. It is characterized by this.

[Embodiments of the invention] The present invention will be described below based on an embodiment shown in the drawings.

In the drawings, reference numeral 1 indicates cement paste.

The cement paste 1 is produced by adding at least cement 4 and hot water 5 to a first mixer 3 located on the upper stage side of the mixer device 2 and kneading them.

This hot water may have a temperature in the range of 40°C to 75°C, preferably about 60°C.

This cement paste 1 is mixed by the first mixer 3 shown in the drawing, and then the entire amount is fed into either the second mixer 7 or the third mixer 8 installed on the lower stage via the switching damper 6. and kneaded again.

At this time, if foamed concrete is to be produced, a large amount of foam 20 formed by a foaming device (not shown) is in the second mixer 7 and third mixer 8 on the lower stage side. injected into the body.

Roughly, heat-generating additive 9 is added to this concrete paste 1.
is added.

This exothermic additive 9 may be present in a small amount and reacts with the concrete paste 1 to generate heat. An example is zirconium.

By adding this exothermic additive 9, the temperature of the concrete paste 1 itself can be raised and maintained at around 60°C continuously.

Next, reference numeral 10 indicates a formwork device. The formwork device 10 includes a plurality of formwork units 13 each having a bottom plate 11 and an end plate 12 that stands upward from the outer peripheral edge of the bottom plate 11 and is stacked in four stages in the illustrated embodiment. It is configured.

The bottom plate 11 is constructed by covering both sides of a thick heat-insulating material 14 made of plastic foam or the like with covering members 15, 15 such as metal members.

Similarly, the end plate 12 is constructed by covering a thick heat-insulating material 14 made of plastic foam or the like with covering members 15, 15 such as metal members, and the end plate 12... It stands up in a substantially rectangular shape on the bottom plate 11 and has a framework.

In addition, on the top of the uppermost form unit 13, a thick heat-insulating material 1 made of plastic foam or the like is provided.
A top plate 16 is placed on both sides of the mold unit 4 and covered with covering members 15 and 15 such as metal members, and seals the inside of the form unit 13.

Next, a second embodiment of the present invention will be described. As shown in the drawing, a formwork unit 13 composed of a bottom plate 11, an end plate 12, and so on includes a plurality of partition plates 1 intersecting each other at approximately right angles.
7... is installed.

These plurality of partition plates 17... can be easily installed at any floor position within the formwork unit 13, thereby allowing concrete plates of a desired size (particularly small shapes) to be installed. It is said to be easily obtained.

Further, this partition plate 17 is also constructed by covering both sides of a thick heat-insulating material 14 made of plastic foam or the like with covering members 15 and 15 such as metal members.

In the above configuration, in order to assemble the formwork unit 13, first place the four end plates 12...
are prepared, the mounting holes 18 at both ends of these end boards 12 communicate with the mounting holes 18 in the opposing end boards 12... and the bottom plate 11, and the fastening members 19 are inserted into the numbered holes 18.18. Formwork unit 12 is formed.

Formwork units 13 are thus formed, stacked in four stages, and a top plate 16 is placed on the formwork unit 13 in the uppermost stage.

Therefore, in order to manufacture concrete products such as concrete plates or concrete blocks, cement paste or cement mortar 1 is first produced, but as mentioned above, the water used for this is heated to around 60°C, and the warm water Using a mixer 3.7.8, cement 1, foam 20 formed with a foaming agent, and optionally various aggregates are mixed together with a heat-generating additive 9, and an appropriate amount is kneaded. Produce cement paste or cement mortar 1.

Then, the cement paste or cement mortar 1
is poured into the formwork unit 13. Furthermore, the next formwork unit 13 is installed, and cement paste or cement mortar 1 is poured into this formwork unit 13.

Thereafter, the formwork units 13 in which the cement paste or cement mortar 1 has been poured are stacked in four stages, and a top plate is placed above the top formwork unit 13 to keep the inside of the formwork unit 13 warm and insulated. 16 is placed and sealed.

As a result, the cement paste or cement mortar 1 is kept warm at approximately 50'C in the formwork unit 13 for about 3 hours, and reaches 60°C in several hours due to the action of the exothermic additive 9 and the generation of hydration reaction heat. This high temperature state is maintained within the insulated form unit 13 for a long time.

For example, concrete plates or blocks can be demolded in about 3 hours and 30 minutes or 5 hours.

[Effects of the Invention] The present invention has the above configuration, and the concrete product manufacturing apparatus according to the present invention does not use electrical energy or fire unlike conventional insulating rooms, steam rooms, or high-pressure steam rooms. Mainly, the formwork equipment itself can easily dry and harden the cement paste early, and it does not require huge amounts of equipment or area for that equipment, which results in high quality concrete. Qin has the excellent effect of being able to provide products at low prices.

The cement used is Portland cement.
It has sufficient strength compared to other methods of using early-strengthening cement.

Further, the formwork device according to the present invention may be left to be cast outdoors, for example, in the middle of winter.

Roughly speaking, the present invention allows easy assembly and demolding of the formwork device itself, making it easy for anyone to work on, and can be poured both indoors and outdoors, and does not require any hot air from outside after casting. At the pouring site, the hot air from the cement paste or cement mortar itself in the formwork equipment and the heat generated by the heat-generating additive generate high temperatures in a short period of time, and the high temperature is maintained for a long period of time, resulting in rapid hardening. In addition, good quality concrete products can be obtained at low cost, resulting in great advantages in terms of time and economy.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a schematic perspective view showing an embodiment of the present invention, FIG.
FIG. 3 is a schematic view showing the connection state of the bottom plate and the end plate, FIG. 4 is a plan view showing another embodiment of the present invention, and FIG. 5 is a schematic view showing a mixer device for cement paste or cement mortar. 1. Cement paste or cement mortar, 2. Mixer device, 3. First mixer 4. Cement, 5. Hot water, 6. Switching damper, 7. Second mixer 8. Third mixer 9.・・Exothermic additive, 10・ 11・ 12・ 13・ 14・ 15・ 16・ 17・ 18・ 19・ 20・ ・Formwork device, ・Bottom plate, ・End plate, ・Formwork unit, ・Heat insulation material, ・Covering member, ・Top plate, ・Partition plate, ・Mounting hole, ・Fastening member, ・Foam.

Claims (2)

[Claims] (1) A cement paste produced by mixing and kneading at least cement and hot water of 40°C to 75°C, a heat-generating additive added to the cement paste to generate heat, and a formwork device into which the cement paste is introduced. The formwork device includes a bottom plate formed by covering both sides of a heat-retaining and insulating material with a covering member, and a frame that stands up above the outer peripheral edge of this bottom plate, and the formwork device is formed by covering both sides of the heat-retaining and insulating material with a covering member. Formwork units made up of end boards formed by the same method are stacked in multiple tiers, and a top plate formed by covering both sides of the heat-insulating material with a covering material is placed on top of the topmost formwork unit. Concrete product manufacturing equipment characterized by a sealed interior (2) A cement paste produced by mixing and kneading at least cement and hot water of 40°C to 75°C, a heat-generating additive added to the cement paste to generate heat, and a formwork device into which the cement paste is introduced. The formwork device includes a bottom plate formed by covering both sides of a heat-retaining and insulating material with a covering member, and a frame raised upward from the outer periphery of this bottom plate, and the formwork device is formed by covering both sides of the heat-retaining and insulating material with a covering member. The formwork units are stacked in multiple tiers, each consisting of a gable plate formed with a single-layered end plate and a plurality of partition plates containing heat-retaining insulation material that can be installed at any location within the gable plate. A concrete product manufacturing device characterized by placing a top plate formed by covering both sides of a heat-insulating material with a covering material and sealing the inside of a formwork unit.