JPH0142805B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method and apparatus for producing concrete products with a buffer layer.

(Prior art) The closest prior art to this invention is the
-There is an invention in Publication No. 33670. A mixture of crushed rubber chips and adhesive is spread on the bottom of the formwork, a milky white acetic acid vinyl resin is applied on top of it, cement is immediately sprinkled on top of it, and the formwork The vinyl acetate resin is filled into the voids of the mixture by vibrating it, and then fresh concrete is filled on top of it and vibrated again, and once solidified, it is demolded.

(Problems to be Solved by the Invention) The invention of the above-mentioned publication is based on the vibrator shown in the drawing, the explanatory text "The kneaded material 3 is made substantially flat by hitting it with a trowel," etc. Although this invention appears to have been a success in the laboratory after much time and effort, it cannot be denied that there are problems in implementing it industrially, as described below.

In other words, a "mixture" of rubber chips and adhesive
It is a material that is extremely difficult to handle industrially because it sticks to anything.How do you feed a certain amount of it into a mold from a kneading device? There is a question of whether to spread it evenly.

It is also difficult to uniformly apply acetic acid vinyl resin on the leveled mixture in such a large amount as to fill the voids in the mixture.

Even if these were done manually, not only would it be a labor-intensive and time-consuming task;
Even after filling the mold, it takes a long time until the entire mold solidifies and can be removed from the mold, and during that time the mold must be left unattended, which is unavoidable.

(Means for Solving the Problems) The above-mentioned conventional technology relies solely on the bridging action of adhesives and vinyl acetate resin to bond rubber chips to each other and to concrete; however, this invention utilizes bonding by pressure compression, In other words, it utilizes the pressure bonding action, which consists of (1) maintaining fluidity in the form of granular or piecemeal elastic materials, and voids in each individual piece that have a viscosity that allows them to be bonded to each other and to the concrete in the formwork; Fill the required amount of this as a buffer material in layers in a forming form, overlap it with the concrete layer filled before or after it, and press the press plate down into the form to form the material layer. Concrete with a buffer layer, characterized in that it is integrated with the concrete layer at the same time as it is hardened, and in a curing step, the concrete layer is hardened and the strength of the joint between the materials and the concrete is increased. Product manufacturing method (2) By adding viscous liquid or viscous powder to the granular or fragmented elastic material and mixing it, the material surface maintains fluidity as a mass, and each piece is bonded to each other and molded. A covering layer is made to enable pressure bonding with the inner concrete, and the required amount of this is filled as a buffer material into the forming form in a layered manner, overlapping with the concrete layer filled before or after, and the press plate is placed inside the above formwork. At the same time, the material layer is compressed to make it porous and solidified, and at the same time, it is integrated with the concrete layer, and in the curing process, the concrete layer is hardened and the joint strength of the mutually crimped parts of the materials and the crimped part with the concrete is increased. (3) A method for manufacturing a concrete product with a buffer layer characterized by proceeding with the following steps:
By adding and mixing viscous liquid or viscous powder to granular or fragmented elastic material, the material maintains fluidity as a mass on the surface of the material, and each individual piece can be crimped with each other and with concrete in the formwork. Create a coating layer, use this as a buffer material, add the above viscous liquid and viscous powder curing agent to the required amount, and immediately after mixing,
Filling the forming form in layers, stacking it with a concrete layer filled before or after it, pressing down a press plate into the formwork, hardening the material layer into a porous state, and at the same time integrating it with the concrete layer, A method for producing a concrete product with a buffer layer, characterized in that, in a curing step, the concrete layer is hardened and the strength of the joint between the materials and the concrete is increased. (4) Scope of Claims 2 or 3
(5) Granular or piece-like elastic material;
By mixing a granular inelastic material and a viscous liquid or viscous powder, it maintains fluidity as a mass, and each elastic material has a coating layer that allows for mutual compression and compression with the concrete in the formwork. Then, fill the required amount of the above-mentioned mixed material as a buffer material into the molding form in layers, overlap it with the concrete layer filled before or after it, and press down the press board into the above-mentioned formwork to harden the above-mentioned mixed material layer. At the same time, a method for producing a concrete product with a buffer layer, characterized in that it is integrated with the concrete layer, and in a curing step, the concrete layer is hardened and the strength of each crimped part of the mixed material layer is increased, (6) Patent A method for producing a concrete product with a buffer layer, wherein the powdery non-elastic material contains ferrite;
(7) A granular or fragmentary elastic material, or a composite material in which a powdery inelastic material is mixed, is made into a state in which it maintains fluidity as a lump and can be pressed against the above elastic material, and the above-mentioned material in this state is and concrete are filled into the forming form in layers one after the other, with an intermediary agent injection step in between, so that they are laminated via the pressure bonding intermediary agent between the two, and a press plate is pressed down into the above-mentioned formwork. At the same time as the elastic material or mixed material is hardened, the material layer, the mediating agent layer, and the concrete layer are integrated, and in the curing process, the concrete layer is hardened, and the mutual crimping portions of the materials and the mediating crimping portions with the concrete are cured. (8) A method for producing concrete products with a buffer layer characterized by increasing the joint strength of A block with plenty of voids that maintains its elasticity and has a viscosity that can be compressed between the elastic materials and between the elastic material and the concrete is used as a buffer material in the required amount to form a dish-shaped surface pallet of an inverted instant demolding concrete forming device. Fill the mold with concrete, cover the opening of the formwork filled with concrete with the above-mentioned surface pallet, use a press device to press the above material onto the upper surface of the concrete in the formwork through the surface pallet, and turn the formwork to attach the surface pallet to the bottom. A method for producing a concrete product with a buffer layer, characterized in that the product is demolded, the concrete hardens and the bonding strength increases between each material and between the material and the concrete in a curing process, and then the surface pallet is peeled off. (9) A granular or fragmentary elastic material, or a composite material mixed with a powdery inelastic material, maintains fluidity as a mass, and each elastic material is bonded directly or indirectly to the concrete in the formwork. A common outer layer is formed on the upper surface of the formwork in which a plurality of adjacent paving stone blocks are simultaneously molded by partitioning the formwork into a block with plenty of voids and having a viscosity that allows it to be compressed. A frame is provided, and while the formwork is vibrated, concrete is first filled into the paving stone block forming space, and then the block-like material is superimposed on this and filled into the common outer frame, and then pressed from above using a press plate. A method for manufacturing a concrete product with a buffer layer, characterized in that the material layer is made porous by rolling down and at the same time integrated with the concrete below, (10) Claims 1, 2, 4, 5, 6, 7
(11) A method for manufacturing concrete products with a buffer layer, in which the entire or surface layer of the concrete is mixed with a hydrophilic polymer resin; (11) A formwork for forming the product; A vibrating device that vibrates the formwork, a press device that lowers a press plate from above into the formwork, and a plurality of sliding hoppers that alternately advance onto the formwork from the side and feed material into the formwork. A parent hopper, a hardened concrete supply device to one of the parent hoppers, and a buffer material supply device to the other parent hopper, comprising a granular or piece-like elastic material, a granular inelastic material, and a viscous liquid or viscous material. A concrete product with a buffer layer, comprising: a mixer equipped with a metering and feeding device for each powder; and a curing field for simultaneously proceeding with the curing of the concrete and the curing of the viscous liquid or the viscous powder. manufacturing equipment, (12) a mold for molding a product, a vibrating device that vibrates the mold, a press device that lowers a press plate from above into the mold, and a press that lowers a press plate from above onto the mold; A concrete supply device that drops concrete, a buffer material supply device that advances onto the formwork from another direction and drops the buffer material, and a granular or piece-like elastic material, a granular inelastic material, and a viscous liquid or viscous powder. , a buffer material mixer equipped with respective metering and feeding devices, and a curing field for simultaneously proceeding with the curing of the concrete and the curing of the viscous liquid or viscous powder; This is an apparatus for producing concrete products with a buffer layer, characterized in that a feeding path by Euphida has a hardening agent supply device for the viscous liquid or viscous powder particles.

(Operation) This invention effectively utilizes the existing equipment of an immediate demolding concrete product manufacturing plant. In other words, not only the process of forming the concrete part of the target product using a formwork, but also the process of forming the buffer layer and joining it with concrete, use the same filling method and pressing means as concrete, and the above-mentioned compression forming and joining process. conduct. In other words, the elastic material that becomes the buffer layer is in the form of granules or fragments, which can flow as nodules and have a viscosity that can be compressed so that when compressed, the materials can be bonded to each other and the material and concrete. This makes it possible to apply the same filling means as conventional hardened concrete, and it also makes it possible to press the concrete in the formwork using a press for pressurizing the concrete. As a result, by simply adding a small amount of equipment to the existing equipment of the concrete product mass production factory, we were able to successfully create mass production equipment for concrete products with a buffer layer.

The buffer layer of this product is a compressed aggregate of particles or fragments, and unlike the conventional technology, the gap is not filled with adhesive liquid to bond it to the concrete layer.
It generally maintains porous properties and water permeability, making it suitable for paving boards, etc.

The concrete with the buffer layer filled and crimped into the formwork is either immediately removed from the mold or sent together with the formwork to a curing field to harden the concrete layer, depending on the slump value of the concrete and the properties of the elastic material crimped part. The curing is performed at a temperature and time that promotes the bonding strength of the elastic material crimped portion.

The adhesive force between the inner surface of the mold and the elastic material layer during immediate demolding is still weak, and even when demolding after curing, the elastic material is in the form of particles or fragments, so it does not harden like when liquid material hardens. The mold can be easily demolded by applying a demolding agent to the inner surface of the mold in advance or by applying vibration to the mold during demolding without causing any adhesion.

In the above-mentioned instant demolding concrete product manufacturing factory, for example, when making machi blocks, a face pallet containing mortar is turned upside down on top of a formwork filled with concrete, and the product is demolded onto the face pallet. There is a method of reversing the formwork.

By applying this invention to this method, we have opened a method for easily attaching a buffer layer to products of any shape, by laying the buffer material on the surface pallet, placing it face down on concrete in the formwork, and pressurizing it. .

Furthermore, when forming a plurality of paving stone blocks at the same time by partitioning the inside of the formwork, a new method for making flexible paving stone blocks was opened by crimping the common buffer layer of the present invention on top of the plurality of paving stone blocks. .

Additionally, as an apparatus for carrying out the manufacturing method of this invention,
A mixer equipped with a metering and feeding device for each material for supplying buffer materials, a parent hopper and a sliding hopper for receiving the kneaded materials have been newly added to the equipment of a conventional instant demolding concrete product manufacturing factory, and concrete hardening and sliding hoppers have been newly added. We proposed a concrete product manufacturing device with a buffer layer that makes the most effective use of existing equipment by reusing or creating a new curing field that simultaneously hardens viscous liquids, etc.

In addition, if the buffer material contains viscous liquid or viscous powder,
We present a method to prevent the material from hardening in the parent hopper by adding and mixing these hardening agents to the buffer material just before it is introduced into the formwork. By performing the mixing in the supply path by the screw feeder of the material supply device, we have presented the simplest and most effective means of uniformly mixing the hardening agent while propelling the required amount of material just before feeding.

(Embodiment) Figure 1 is an explanatory diagram of one embodiment of this invention.
G is concrete, G is a buffer material mainly composed of granular or fragmentary elastic material, 1 is a mold for forming the pavement board M which is the target product of this example, 2 is an excitation device thereof, 3 is a press device, 4 and 4' are sliding hoppers for concrete and buffer material, respectively; 5 and 5' are parent hoppers for concrete and buffer material, respectively;
a and 5'a are mixers that send mixed materials to each,
The curing equipment is for conventional concrete, so the diagram is omitted.
Only the slat conveyor 6 heading from the molding plant to the curing plant is shown. Product M placed on conveyor 6 is the fourth
This is a concrete pavement board with a buffer layer shown in the figure.

In this embodiment, an instant demolding type concrete product forming apparatus using hardened concrete is used as is, and a new parent hopper 5' for buffer material G, A sliding hopper 4' is added. The press device 3 and the vibration device 2 attached to the formwork 1 are already installed, and the formwork 1 is of a type that allows concrete products to be demolded downward. The formwork bottom plate 1a is supported and driven by a lifting cylinder 7, and after filling with concrete, when the bottom plate 1a is lowered to the position indicated by the chain line in FIG. The equipment was used as is.

To explain the process in order, first, each parent hopper 5,
Materials will be put into 5'. Ordinary hardened concrete is poured into the parent hopper 5 from the mixer 5a. The mixer 5'a, which feeds materials into the newly added parent hopper 5', mixes granular or fragmented elastic material (urethane chips), powdery granular elastic material (lime carbonate), and viscous liquid or viscous powder (urethane resin liquid).
Each metering device g, p, v is attached.
When the mixture is fed from these feeding devices into a mixer 5'a according to the composition described below and mixed, it becomes a mass with many voids and has fluidity similar to concrete, but it hardens when compressed and a strong bond is obtained by curing.

The elastic material can be either rubber or synthetic resin, but there are two ways to give the particles or pieces the compressive properties that allow them to be joined by pressing them: one is to make the material itself viscous through heating or chemical treatment, and the other is to make the outer surface viscous. There is a method of applying a film.

In either method, rather difficult conditions are imposed, such as having to appropriately combine the contradictory properties of fluidity and viscosity, but even if it is called viscosity, it only needs to be fixed when compressed. Even if the adhesion is weak at first, it can be strengthened through curing.

In order to increase fluidity, it is not always necessary to increase the amount of liquid on the surrounding surface of the material. In a near-dry state, when they come into contact with each other while flowing, they do not stick and maintain good fluidity, but they may be fixed by strong pressure.

In the above example, a coating made of a viscous liquid (urethane resin) and inelastic powder (lime carbonate) is applied to the material.Increasing the resin liquid increases fluidity, and lime has the opposite effect, so Fluidity and compressibility can be adjusted by adjusting the distribution, making it easy to determine the optimal mixture experimentally.

Now, after putting concrete C and buffer material G into the main hoppers 5 and 5' on both sides to create the state shown in Fig. 1, in this embodiment, first, as shown in Fig. 2, the concrete side sliding hopper 4 is placed in the formwork 1. Proceed upward. The sliding hopper 4 slides on the fixed sliding plate 9 at the height of the upper edge of the formwork 1, and during the movement, the exit of the parent hopper 5 is
This is a well-known structure that is closed by a horizontal closing plate 10 attached to the rear.

FIG. 2 shows the state in which the concrete C in the sliding hopper 4 has fallen into the formwork 1 and its surface has been made almost horizontal either by the vibration device 2 alone or with the help of the press device 3. When the formwork 1 is vibrated by the vibrating device 2, the surface of the poured concrete C is leveled, and at the same time, the voids inside the concrete and every corner of the formwork are evenly filled with concrete.

Then, when the sliding hopper 4 is returned to its original position and the sliding hopper 4' on the opposite side is advanced onto the formwork 1, the cushioning material G falls onto the concrete C in the formwork 1 as shown in FIG. Since the formwork 1 is vibrated by the , it spreads flatly and forms an elastic material layer, similar to concrete. In reality, slightly more cushioning material G than required enters the sliding hopper 4', so when returning the sliding hopper 4',
Scrape off the excess and smooth the surface.

Then, the press device 3 is operated to press and compact both materials in the formwork 1 with the press plate 3a. During this time, it is preferable to apply vibration to the formwork 1 so that the granular or piece-like elastic materials can be assembled without any voids and the maximum crimping area can be obtained.

Then, when the force of the lifting cylinder 7 supporting the formwork bottom plate 1a is loosened, the concrete C layer and the cushioning material G layer integrated within the formwork 1, in other words, the product M It is sandwiched between the press plate 3a and the mold bottom plate 1a and is pushed out downward. The press plate 3a is returned upward, and the extrusion cylinder 8 transfers the product M onto the conveyor 6, which conveys the product M to a curing area. The process from demolding to curing remains the same as before. The curing conditions are determined so as to both harden the concrete and increase the joint strength of the crimped portion of the elastic material. The urethane resin liquid that makes up the elastic material coating layer in this example will harden even if left at room temperature in a curing field, but since it has thermosetting properties, it is best to cure it at a high temperature that can also be used for concrete to accelerate hardening.

The product M thus obtained is a concrete paving board with a porous buffer layer in the form of compressed and aggregated urethane chip agglomerates. This porous buffer layer becomes water permeable unless the pressing pressure is excessively high, so if the concrete that forms the main body of the paving board is made of well-known water permeable concrete, the paving board will have both buffering properties and water permeability.

In addition, if the concrete layer is sufficiently hardened using a press plate 3a shaped to form water guide grooves on the upper surface of the concrete filled in the formwork 1, and then an elastic material layer is built on top of it, as shown in Fig. 5. This results in a water-permeable buffer pavement board having water guide grooves 11.

In the above embodiment, the hard concrete buffer material with a low moisture content was pressed, so the concrete layer and the buffer material layer could be joined relatively easily. However, if concrete with a high moisture content was poured, it would become somewhat troublesome. However, recently, water-resistant adhesives have been developed, and if used as a viscous liquid, they can generate a certain degree of bonding force even within the formwork, making it possible to create a sufficiently strong bond in a curing field.

In addition, as a means to strengthen the bond between the concrete layer and the buffer material layer, a pressure bonding agent layer such as a polyester resin may be inserted between the two layers. This is equivalent to a primer in road paving work.
A strong joint between the two layers is created by adding a mediating agent injection step between the steps of forming the concrete or buffer material layer on the formwork described above, and providing a mediating layer of appropriate thickness between the two layers. In addition, a hydrophilic polymer may be mixed into the concrete in advance to improve adhesion.

No matter which method is used, mucus adheres to the inner surface of the formwork 1 at the portions that come into contact with the buffer material layer and the sprayed mediator, and when left to stand, this hardens. Therefore, in this embodiment, when pressing down the press plate 3a to demold the product M, the periphery of the press plate 3a scrapes off the mucus adhering to the inner surface of the form 1 and allows it to seep into the periphery of the product M. .

When creating slopes and grooves 11 on the upper surface of the lower concrete layer as shown in FIG. 5, it is preferable to insert a special push plate from the side under the press plate 3a. Furthermore, if the press plate 3a has a corrugated surface, the upper surface of the buffer layer is corrugated to prevent slippage, and at the same time, the upper surface of the concrete layer is also corrugated to increase the bonding area with the buffer layer and increase peeling resistance. Various effective irregularities other than waveforms can be considered.

In the above embodiment, the concrete was first poured into the formwork 1 and then the buffer material was poured, but if the order was reversed, the concrete would easily enter the gaps between the elastic materials due to its own weight and vibration.

However, in order to spread the cushioning material G flatly on the bottom of the formwork 1, as in the case where the concrete C is poured first, not only vibration but also support from the press plate 3a and other supports are required.

It depends on the material of the elastic material, but if there are problems such as a buffer layer made of porous elastic material being too soft or easily falling off when kicked by shoes,
This can be easily improved by mixing the above-mentioned powdery non-elastic material, such as lime carbonate.

In addition, instead of demolding the plate-shaped product to the bottom (or top) of the formwork as in the example shown in Figure 1, if the product is a block, the formwork is flipped 180 degrees and released by gravity. Make a mold. This is the case when a buffer layer is attached to the surface of the block.

The embodiment shown in FIG. 6 is such that the formwork 1 filled with concrete C can be turned over 180 degrees by a chain wheel 12 so that its opening can face directly below. The formwork support mechanism 13 is equipped with a rotating pallet support 15 for placing a surface pallet 14 and lowering it into the opening of the formwork 1, and moving it from the solid line position to the chain line position in the figure.
Turn 180°.

While the pallet receiver 15 is vibrated by the vibrating device 2 on the back side, the cushioning material G is evenly dropped onto the pallet 14 by the supply conveyor 16 that moves back and forth. When the filling of concrete into the formwork 1 is completed, the conveyor 16 is withdrawn, the pallet receiver 15 is rotated, the surface pallet 14 is placed face down on the upper surface of the formwork 1, and the pallet receiver 15 is immediately returned to its original position. Then, the press plate 3a is lowered, and the buffer material G is pressed and crimped onto the upper surface of the concrete C from above the surface pallet 14. After returning the press plate 3a upward, the chain wheel 12 is turned to reverse the formwork 1, and the surface pallet 15 is
The product M with the mark is dropped downward as shown by the chain line to remove it from the mold. Then, this is placed on a conveyor, sent to a curing field, and when it has properly hardened, the process of peeling off the surface pallet is the same as in the conventional method in which mortar is placed in the surface pallet.

Although each of the above embodiments has one buffer layer attached to one concrete block, it is also easy to attach a common buffer layer to a plurality of blocks.
Fig. 7 shows an example of the product, and Fig. 8 shows the main parts of the manufacturing equipment. In this embodiment, a common cushioning material G layer is pressed onto 16 paving stone blocks C. As shown in Fig. 8, a modified formwork is constructed by simply adding a common outer frame 1b for forming a layer of buffer material G common to each block to the upper surface of the formwork 1 for simultaneously molding a plurality of adjacent paving stone blocks C. It is.

If this modified formwork 1' is placed in the position of formwork 1 in Figure 1 and concrete C is dropped onto the bottom of the formwork and vibrated as shown in Figure 2, the concrete will be flattened into the recesses for forming each paving stone block. It fits. then the third
As shown in the figure, the cushioning material G is dropped onto the upper layer, compressed by the press plate 3a and solidified into one piece, and then the 16 push-up protrusions 17 are attached to the bottom plate 1a of the formwork shown in Figure 1 as shown in Figure 8. The modified bottom plate 1'a is raised and the product is demolded upward. It goes without saying that Concrete C may have a water-permeable composition.

It is also possible to make the mold 1' into a fixed bottom plate and attach it to a reversing device as shown in FIG. 6 to reverse and demold the mold. The vertical and horizontal grooves 18 on the upper surface of the buffer layer are for improving flexibility.

Next, a manufacturing apparatus of the present invention shown as an embodiment in FIG. 1 will be described. Although the manufacturing method of the present invention can be carried out using various types of manufacturing equipment, as mentioned earlier, the method that most effectively utilizes the existing equipment of a concrete product manufacturing plant is shown here.

The main parts are the above-mentioned product forming mold 1, its vibration device 2, press device 3, sliding hopper 4, 4',
Each parent hopper 5, 5' and a mixer 5'a for the parent hopper 5' are provided with measuring and feeding devices g, p, and v for the elastic material, inelastic granular material, and viscous material, respectively, and curing equipment (not shown). be. The only new addition to the existing instant demolding molding equipment is the preparation and supply equipment for the cushioning material G.

The operation description has been described above, so to add to the attached equipment, when spraying the bonding agent between the buffer material layer and the concrete layer, the injection nozzle is not shown, but one or more injection pipes are placed on standby. It is only necessary to advance it from the position below the press plate 3a. This also applies to the manufacturing method using an inverted mold.

In the embodiment shown in FIG. 9, when a mixture of a granular or piece-like elastic material, a granular inelastic material, and a viscous liquid or viscous powder is used as the material for the buffer layer, a hardening agent for the viscous liquid or viscous powder is used. It has a device that supplies the material either by dripping or spraying onto the material just before it is placed in the mold, immediately spreads and mixes it evenly over the entire material, and then drops it into the mold. In this embodiment, the present invention is applied to the equipment shown in FIG. 1, and the only difference is that there is a material measuring chamber 19 between the buffer material G parent hopper 5' and the sliding hopper 4', and shutters above and below it. mechanism 20, 20',
Feeding path 2 entering the screw feeder 21 below
2. Hardening agent dripping port 23 installed on the ceiling in the middle,
These are the dropping device 24 and the like. After closing only the lower shutter 20' of the measuring chamber 19 and receiving the material G from the parent hopper 5' into the chamber, closing the upper shutter 20 and opening 20', the required amount of material G is delivered to the feeding path 22.
falls. When the screw feeder 21 is driven, the material G advances to the outlet, but when the curing agent is dripped from the dripping port 23, the screw blades spread and mix it throughout the material G, so that it slides from the outlet. When it falls into the hopper 4', it penetrates evenly and promotes the subsequent hardening of the adhesive component.

Note that this invention in which a curing agent is supplied to the buffer material immediately before it is filled into the mold, and the screw feeder performs diffusion mixing and propulsion at the same time is not limited to the method of feeding the material into the mold via a sliding hopper. It goes without saying that it may be directly poured into the formwork from the screw feeder. Furthermore, since the material is dropped continuously in small amounts from the screw feeder, it is well known that the screw feeder itself drops the material while moving the side that receives it, so that the material is piled up in one place. It is also good to avoid.

In other respects, the embodiments of the manufacturing method and manufacturing apparatus of the present invention can be varied and applied in a variety of ways depending on the implementation conditions and the well-known techniques of the engineer in charge.

For example, the powder-like inelastic material mixed into the cushioning material may be pigments, glass beads, or other materials, and by using magnetically sensitive materials such as ferrite, it is easy to make paving blocks for guiding blind people that can be sensed by a blind person's cane. be.

An example of the composition of the buffer material G and concrete C of the above embodiment is shown below.

[Buffer material]

Urethane chips (particle size 1.5-3.0mm) 585g Lime carbonate 180g Urethane resin liquid (product name Hamatite) 135g [Concrete 1] Cement 1600g Water 590g Crushed stone (1.5-3.0mm) 2700g River sand 4880g [Concrete 2: Water permeable Properties] Cement 1750g Water 490g Crushed stone (2.5-5.0mm) 7000g [Concrete 3: Contains polymer] Cement 1600g Emulsion (SBR) 160g Water 430g Crushed stone 2700g River sand 4880g (Note) SBR stands for styrene, butadiene, rubber. In short,
A milky white liquid containing 40% polymer and 60% moisture. (Effects of the invention) This invention maintains fluidity in the form of granular or fragmented elastic materials, and allows individual pieces to be crimped together and with concrete in formwork. By making it into a state with a high viscosity, it has properties similar to hardened concrete that hardens when squeezed by hand, making it possible to use the hardened concrete quantitative supply mechanism, filling, and pressure forming of conventional instant demolding concrete forming equipment. , a demolding mechanism;
Using the technology of the Japanese Patent Publication No. 58-2042 ``Method and Manufacturing Apparatus for Composite Concrete Products'' that the applicant had previously developed, a mass production method was established in which a buffer layer made of the above material and a concrete layer were bonded and formed within a formwork. .

When using a cushioning material made by adding viscous liquid or viscous powder to an elastic material, it is possible to create the required pressure-adhesive coating layer on the surface of the material, compared to when the material itself is given pressure-adhesive properties by heating, etc. , technically easy and highly practical.

In addition, if you add a granular inelastic material to the main elastic material and use a mixture of viscous liquid or viscous powder, the granular inelastic material can fill the gaps between the granular or fragmented elastic materials. filling, increasing the overall compressive strength. It also serves to appropriately weaken the fluidity of the elastic material block and reduce the water permeability of the product.

In addition, by spraying a crimping agent layer between the concrete layer and the elastic material layer, the crimping area becomes significantly larger than in the case of direct crimping between the concrete, elastic material particles, and pieces. Increases bonding strength and reliability.

In addition, when attaching a buffer layer to a product that requires inversion demolding, it is possible to use the same process as before by inserting the above-mentioned buffer material instead of mortar into the surface pallet, which was conventionally filled with surface mortar and placed over the opening of the formwork. This paved the way for products with a buffer layer.

In addition, after filling the formwork with concrete to partition the inside of the formwork and form multiple paving stone blocks at the same time,
By layering the above-mentioned baby-boom material on top of them,
A method for easily attaching a common buffer layer is disclosed.

In addition, we proposed a manufacturing device that added a small amount of equipment to the conventional hard concrete molding equipment and that could be operated in the same way as before. In addition, a hardening agent that accelerates the hardening of viscous liquid or viscous powder mixed into the buffer material,
Immediately before the material is introduced into the formwork, the device drops or sprays it into the supply path entering the screw conveyor, and when the screw completes the diffusion and mixing, the material is dropped. This device prevents the buffering material from curing in the hopper and promotes curing within the formwork. Facilitate work management.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of one embodiment of the manufacturing apparatus of the present invention, Figs. 2 and 3 are explanatory diagrams of its operation order, and Figs.
The figure is a perspective view of two examples of products made with the above device.
Fig. 6 is an explanatory diagram of an embodiment for a product that is immediately removed from the mold by reversal, Figs. 7 and 8 are perspective views of another product and an explanatory diagram of the main parts of the molding equipment, and Fig. 9 shows a hardening agent immediately before dropping the cushioning material. FIG. 2 is an explanatory diagram of a manufacturing apparatus that adds C...Concrete, G...Buffer material, 1...
Formwork, 2... Vibration device, 3... Press device, 4,
4'...Sliding hopper, 5,5'...Parent hopper,
5a, 5'a...mixer, g, p, v...measuring and supplying devices for elastic material, inelastic material, and viscous material, respectively.

Claims (1)

[Scope of Claims] 1. A granular or piece-like elastic material that maintains fluidity as a nodule, and each individual piece has a viscosity that can be bonded to each other and to the concrete in a formwork, and is rich in voids. Fill the forming form with the required amount as a buffer material in layers, overlap with the concrete layer filled before or after it, press down the press plate into the form, harden the material layer, and at the same time add the concrete. A method for manufacturing a concrete product with a buffer layer, characterized in that, in a curing step, the concrete layer is hardened and the bonding strength of the mutually crimped portion of the materials and the crimped portion with the concrete is increased. 2 By adding and mixing viscous liquid or viscous powder to granular or fragmented elastic material, the material surface maintains fluidity as a mass of material, and each individual piece can be crimped with each other and with the concrete in the formwork. A covering layer is made to make the process possible, and the required amount of this is filled as a buffer material into the forming form in a layered manner, and it is overlapped with the concrete layer filled before or after that, and the press board is pressed down into the formwork to achieve the above-mentioned effect. It is characterized by hardening the material layer to make it porous and at the same time integrating it with the concrete layer, and in the curing process, promoting hardening of the concrete layer and increasing the joint strength of the mutually crimped portions of the materials and the crimped portions with the concrete. A manufacturing method for concrete products with a buffer layer. 3 By adding and mixing viscous liquid or viscous powder to granular or fragmented elastic material, the material surface maintains fluidity as a mass of material, and each individual piece can be crimped with each other and with the concrete in the formwork. Using this as a buffer material, add the above-mentioned viscous liquid and viscous powder curing agent to the required amount, and immediately after mixing, fill the mold in layers, and fill the concrete before or after that. The layers are stacked, and a press plate is pressed down into the formwork to solidify the material layer into a porous layer, and at the same time, it is integrated with the concrete layer, and in the curing process, the concrete layer is hardened and the materials are crimped together. A method for manufacturing a concrete product with a buffer layer, characterized by increasing the bonding strength of the crimped portion and the concrete. 4. A method for producing a concrete product with a buffer layer according to claim 2 or 3, wherein the viscous liquid or viscous powder has thermosetting properties. 5. By mixing granular or fragmentary elastic material, granular inelastic material, and viscous liquid or viscous powder, the nodule maintains fluidity, and each of the above elastic materials is bonded to each other and to the concrete in the formwork. Create a covering layer that enables crimping, fill the required amount of the above mixed material as a buffer material into the molding form in a layered manner, overlap it with the concrete layer filled before or after it, and press the press plate into the above formwork. Concrete with a buffer layer is characterized in that it hardens the mixed material layer and at the same time integrates with the concrete layer, so that in a curing step, the concrete layer is hardened and the strength of each crimped part of the mixed material layer is increased. Product manufacturing method. 6. A method for producing a concrete product with a buffer layer according to claim 5, wherein the powdery inelastic material contains ferrite. 7 A granular or fragmentary elastic material or a composite material mixed with a powdery inelastic material is brought into a state in which it maintains fluidity as a lump and can be pressed against the above elastic material, and the above material in this state and concrete and are filled into the molding frame in a layered manner, sandwiching the mediating agent injection step, so that they are laminated via the compression mediating agent between the two, and the press plate is pressed down into the molding material to form the elastic material. At the same time as hardening the material or mixed material, the material layer, the mediating agent layer, and the concrete layer are integrated, and in the curing process, the concrete layer is hardened, and the mutual crimping parts of the materials and the mediating crimping part with the concrete are joined. A method for manufacturing concrete products with a buffer layer characterized by increasing strength. 8 A granular or fragmentary elastic material, or a composite material mixed with a powdery inelastic material, maintains fluidity in the form of a mass, and is used between elastic materials and between elastic materials,
The space between the concrete is a block with plenty of voids that has a viscosity that allows it to be compressed, and the required amount of this is filled as a buffer material into the dish-shaped surface pallet of the reversible instant demolding type concrete forming equipment, and the opening of the formwork filled with concrete is filled with the required amount as a buffer material. The area is covered with the above-mentioned surface pallet, and the material is pressed onto the upper surface of the concrete in the formwork through the surface pallet using a press device.The product with the surface pallet attached below is removed from the mold by reversing the form, and in the curing process, the concrete is removed. Curing and between each material,
A method for producing a concrete product with a buffer layer, which is characterized by increasing the bonding strength between the material and the concrete, and then peeling off the surface pallet. 9 A granular or fragmented elastic material, or a composite material mixed with a powdery inelastic material, maintains fluidity as a mass, and each elastic material can be crimped with each other or directly or indirectly with concrete in a formwork. A common outer frame is placed on the top surface of the formwork for forming a plurality of adjacent paving stone blocks at the same time by partitioning the inside of the formwork and forming a common buffer layer for each block. First, concrete is filled into the paving stone block forming space while vibrating the formwork, and then the nodule-like material is superimposed on this and filled into the common outer frame, and then pressed down from above with a press plate. A method for producing a concrete product with a buffer layer, characterized by hardening the material layer into a porous layer and at the same time integrating it with the concrete below. 10 In the manufacturing method described in any one of claims 1, 2, 4, 5, 6, and 7, the entire or surface layer of the concrete has a buffer layer mixed with a hydrophilic polymer resin. Manufacturing method for concrete products. 11 A mold for forming a product, a vibrating device that vibrates the mold, a press device that lowers a press plate from above into the mold, and a press device that alternately advances from the side onto the mold to feed the material. a plurality of sliding hoppers, each parent hopper, a device for supplying hardened concrete to one of the parent hoppers, and a device for supplying cushioning material to the other parent hopper, the device comprising: A mixer equipped with a metering and feeding device for each of the inelastic material, the viscous liquid or the viscous powder, and a curing field for simultaneously proceeding with the curing of the concrete and the curing of the viscous liquid or the viscous powder. Manufacturing equipment for concrete products with a characteristic buffer layer. 12 A formwork for forming a product, an excitation device that vibrates the formwork, a press device that lowers a press plate from above into the formwork, and a concrete supply that advances onto the formwork from the side and drops concrete. a device;
A cushioning material supply device that advances from a different direction onto the above-mentioned formwork and drops the cushioning material, and a metering and feeding device for granular or piece-like elastic material, granular inelastic material, and viscous liquid or viscous powder are attached. The buffer material supply device is equipped with a buffer material mixer and a curing field for simultaneously curing the concrete and curing the viscous liquid or viscous powder, An apparatus for manufacturing a concrete product with a buffer layer, characterized in that it has a curing agent supply device for the viscous liquid or viscous powder.