JP2011080230A - Pavement material composition, pavement material using the pavement material composition, and method for preparing pavement material composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for preparing a pavement material composition, by which the pavement material composition is prepared on construction site into a composition with a viscosity suitable for construction without receiving influences on characteristics caused by differences in a production site of gravel-like aggregate and in collecting time of the gravel or the like. <P>SOLUTION: The method for preparing the pavement material composition comprises: a sprinkling process for sprinkling an aqueous emulsion 6 from above the aggregate 5 after accommodating the aggregate 5 mixed on the construction site in a transparent resin sheet 7 covering the inner surface of an accommodating container 4; a permeation settling process for settling an emulsion layer 10 so that the layer permeates downward along the gap between the aggregates 5 according to the gravity, the emulsion layer of the aqueous emulsion 6 being formed while temporarily remaining on the layer upper surface 9a of the aggregate layer 9 of the aggregate 5 by the sprinkling process; and a composition extracting process for extracting the aggregate 5 and the pavement material composition 1 of the aqueous emulsion 6 together with the transparent resin sheet 7 from the accommodation container 4 after the permeation mixture of the aqueous emulsion 6 into the aggregate layer 9 is completed while the emulsion layer 10 is lost from the layer upper surface 9a of the aggregate layer 9. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a paving material composition, a paving material using the paving material composition (hereinafter simply referred to as “paving material”), and a method for preparing the paving material composition (hereinafter simply referred to as “preparing method”). In particular, the present invention relates to a pavement composition, a pavement, and a preparation method using an inorganic gravel aggregate containing natural stone.

  Conventionally, asphalt pavement, cement pavement, and concrete from the viewpoints of road surface protection, dust-proofing measures, environmental measures, etc. for road surfaces around the building and the ground, or indoor floor surfaces, and part of the wall surfaces of buildings. Various pavement materials such as pavement are laid (or attached). Furthermore, with the recent boom in gardening, etc., the garden in the building site may be designed and improved according to the taste of the resident, and even in this case, the sidewalks etc. provided in the garden are paved above. It is paved with timber and decorated with aesthetics.

  In particular, paving materials laid for the purpose of improving aesthetics and scenery use, for example, fine-grained aggregates such as natural stones of several mm to several tens of millimeters to synthesize colorless and transparent epoxy resins and urethane resins. A hard material can be obtained by mixing with a solvent-based adhesive containing a resin and curing the mixture. As a result, a paving material having sufficient strength against impacts, etc., and excellent weather resistance against rainwater, etc. is formed, the type of stone of aggregate such as natural stone used as aggregate, difference in quarrying place, By appropriately changing the color, size, shape, etc., it is possible to arbitrarily select a paving material in consideration of the residents' preferences and the balance with the surroundings, and design a garden or the like.

  At this time, the paving material is formed by curing a paving material composition formed by mixing the aggregate and the adhesive, and the aggregate is a two-component curing type composed of two liquids of the main agent and the curing agent. A mixture of adhesives is mainly used. Here, the adhesive is used to harden the fine aggregates so that they aggregate together, and to maintain a certain shape (for example, a flat plate shape) as a paving material, and has the above-mentioned impact resistance and weather resistance. In order to construct a paving material composition so that it becomes a paving material of a predetermined thickness as required, use one that has been prepared to an appropriate viscosity with good handling properties during construction such as glazing operations There is a need. For example, the main component (polyol component having an alcohol group) and the curing agent component (diisocyanate component having an isocyanate group) as raw materials for urethane resin are dissolved in an organic solvent such as toluene and xylene, On the other hand, when the main agent and the curing agent are mixed in a specified amount, a urethane bond is generated between the main agent and the curing agent, and the paving material having the above characteristics is formed by the progress of the curing reaction. Here, toluene, which is a volatile organic solvent, is gradually evaporated into the atmosphere during the curing and drying processes. Some of the two-component curable adhesives have a curing reaction accelerated by moisture (water) in the air.

  However, in the case of a two-component curable adhesive, the curing reaction proceeds rapidly after the main agent and the curing agent are mixed, and therefore, the work capable of applying the pavement composition containing the adhesive to the construction target surface. The time (pot life) was limited. In other words, it cannot be mixed in advance at factories that manufacture paving material compositions, and even when the main agent and curing agent are mixed at the construction site, the pot life is often relatively short. In some cases, the entire amount of the mixed paving material composition could not be used up.

  Furthermore, when pavement material is to be constructed on a wide range of construction target surfaces, it is not possible to prepare a large amount of pavement composition at one time, and the weight and mixing of aggregates and adhesives according to the construction target surface area It was necessary to carry out the work several times. In addition, it is necessary to clean the instruments and equipment used for weighing and mixing (for example, measuring instruments, toro boats, kneading mulberries, etc.) before curing, and an organic solvent is required for cleaning. Here, the organic solvent used for cleaning could not be treated at the construction site, and it was necessary for the construction company to take it back to the office and dispose of it at a dedicated waste disposal facility. Furthermore, in the case of a two-component curing type adhesive, the paving material that has been cured has changed to a hard material and lacks flexibility. For this reason, when an excessively strong impact is applied, there is a problem that a part or all of the pavement material is cracked or chipped without elastic deformation. That is, there was almost no resistance to durability and durability.

  On the other hand, the applicant of the present application has developed a polymer-based aqueous emulsion formed by mixing an organic polymer such as polypropylene, a dispersant such as polyvinyl alcohol, and water in order to eliminate the above problems. Application to paving material compositions, paving materials, and the like using this as a one-component dry-curing adhesive has already been performed (see Patent Document 1).

  The so-called “premix type” paving material composition using the above aqueous emulsion as an adhesive does not contain an organic solvent such as toluene in its components, and the worker stirs and mixes at the construction site. It was not necessary to prepare, and it was possible to construct the construction target surface immediately after opening the container, and it had good handling properties. Furthermore, compared to the case of the two-component curing type, the workable time for construction becomes longer, and re-construction and paving material surface correction work and the like may be relatively easy.

  However, when the above-mentioned “premix type” pavement material composition is used, the following problems may occur. In other words, fine-grained inorganic gravel aggregates used in pavement compositions are produced in countries around the world such as Japan, China, and the Philippines. It had been. Therefore, many were exposed to seawater etc., and the contained component was different individually. Also, even if sand is collected on the same land, the moisture content (drying rate), salinity concentration, etc., depending on the time of sand collection, the state of transport until it is transported to Japan, or the storage method after sand collection, etc. There were cases where the various characteristics of were significantly different.

  Therefore, the difference in the above characteristics may cause a difference in curability with the aqueous emulsion. Therefore, when pre-mixed with gravel aggregate and adhesive (aqueous emulsion) at the manufacturing factory, the curing reaction proceeds during storage and transportation until reaching the construction site from the manufacturing factory, rather than being suitable for construction. There was a possibility of high viscosity. For this reason, handling properties are reduced, and good coating may not be performed.

  Therefore, in view of the above circumstances, the present invention has an object to provide a paving material composition having a viscosity suitable for construction at a construction site without being affected by characteristics due to differences in the production place of the gravel-like aggregate or the timing of sand collection. Furthermore, it is an object of the present invention to provide a pavement material composition, a pavement material, and a preparation method that are excellent in handling properties that can reduce the work burden of a contractor.

  In order to solve the above-described problems, the pavement composition of the present invention is “gray-like aggregates and sprinkled from above at the construction site of the gravel-like aggregates, and penetrates between the gravel-like aggregates according to gravity. Thus, it is mainly composed of a one-component dry curing aqueous emulsion mixed with the gravel aggregate.

  Here, the gravel aggregate is assumed to be an inorganic aggregate mainly composed of an inorganic material such as natural stone such as sand, gravel, rocks, crushed stone, or ceramic grains of about several mm to several tens of mm. , Japan, China, and other countries are assumed. On the other hand, the aqueous emulsion does not use an organic solvent as in the conventional two-component curable adhesive, but the main agent is dispersed in water using a dispersant and is in an emulsified state. For example, a known material such as an acrylic ester can be used. In addition, the water-based emulsion has a property of exhibiting an adhesive function by allowing the water contained therein to gradually evaporate by being left in the atmosphere and to become sticky by drying. Then, when drying is finally completed, it is solidified (hardened), and the mixed aggregates are bonded to each other, and can be shaped into a pavement having a desired shape such as a plate shape. In other words, unlike the conventional two-part curable adhesive, it is not necessary to mix the main agent and the curing agent to accelerate the curing reaction, and the pot life can be extended compared to the conventional type. It becomes possible.

  Therefore, according to the paving material composition of the present invention, a one-component dry-curing aqueous emulsion is used as an adhesive for the paving material composition. At this time, mixing of the gravel aggregate and the aqueous emulsion is performed immediately before construction at the construction site. Furthermore, at the construction site, a predetermined amount of aqueous emulsion is sprinkled on the gravel-like aggregate from above, and mixed between the gravel-like aggregates with the aqueous emulsion so as to penetrate downward according to gravity. It will be in the state. Therefore, it is not necessary to perform a kneading operation for mixing both at the construction site. Here, since the aqueous emulsion has a predetermined viscosity, immediately after being sprinkled from above the gravel aggregate, it stays on the upper surface of the aggregate layer of the gravel aggregate and gradually penetrates into the interior. Therefore, it takes about several minutes to complete the mixing.

  Further, the pavement composition of the present invention has, in addition to the above structure, “the aqueous emulsion is composed of at least one organic polymer, a polyvinyl alcohol component having a saponification degree of 95% or more mixed with the organic polymer, water And “” may be included.

  Here, the organic polymer used in the aqueous emulsion is, for example, an olefin resin such as polyethylene resin or polypropylene resin, a polymer or copolymer such as styrene polymer, vinyl chloride polymer or vinyl acetate polymer, butyral resin, or the like. It is possible to use various other known synthetic resins having thermoplasticity, and at least one kind of such synthetic resin is selected and used. Furthermore, a copolymer component such as an alkyl acrylate / styrene copolymer may be added as necessary for the modification of the aqueous emulsion.

  On the other hand, the polyvinyl alcohol component generally exhibits water-soluble properties and is known as a well-known synthetic resin. The polyvinyl alcohol component acts as a dispersant for maintaining the state of the aqueous emulsion by dispersing the organic polymer and maintaining it in an emulsified state. Here, the place where the construction of the pavement material by the pavement material composition is performed is often an outdoor road surface around the building, except for a part. Therefore, the paving material composition of the present invention needs to have sufficient water resistance against moisture such as rain water in the state of the paving material after completion of construction. As described above, since the polyvinyl alcohol component generally exhibits water solubility, the use of the polyvinyl alcohol component as a dispersant in the above pavement composition may reduce the water resistance of the pavement after drying and curing. is there.

  However, the paving material composition of this embodiment employs a polyvinyl alcohol component having a saponification degree of 95% or more. Here, when the value of the saponification degree is small, it means that the solubility in water is high as described above. On the other hand, when the saponification degree is 95% or more, the insolubility in water is high. I mean. Therefore, the aqueous emulsion of the pavement material composition of the present embodiment can be configured as an aqueous emulsion by using a polyvinyl alcohol component having a high saponification degree, and can be dissolved in rainwater or the like even after drying and curing. This makes it possible to exhibit strong water resistance that does not occur. As a result, it is possible to construct a pavement material outdoors.

  Therefore, according to the paving material composition of the present invention, it is possible to form a water-resistant aqueous emulsion with an organic polymer and a polyvinyl alcohol component having a controlled saponification degree, and the use outdoors can be limited. Absent. Here, as the organic polymer used in the aqueous emulsion, for example, those having an average molecular weight of 3000 to 100,000 are used, and for the polyvinyl alcohol component, those having an average molecular weight of 500 to 3000 are exemplified. Can do. Furthermore, penetration between gravel aggregates is facilitated.

  On the other hand, the pavement material of the present invention is “a pavement material using the above-mentioned pavement material composition, which is sprinkled from above at a construction site of the gravel aggregate and the gravel aggregate, and the gravel aggregate. A pavement material composition having a one-part dry-curing type aqueous emulsion mixed with the gravel-like aggregates by penetrating in accordance with gravity during coating is formed by applying to a predetermined thickness and drying and curing. It is mainly composed of what is done.

  Therefore, according to the pavement material of the present invention, by using the above-mentioned pavement material composition, it is coated (applied) by glazing or the like so as to have a predetermined coating thickness, and left in such a state for a long time. It is formed by curing an aqueous emulsion. Thereby, it becomes possible to construct a pavement material by a simple operation using the pavement material composition having the above-described excellent action. Furthermore, the pavement material has a property as a soft member that can be deformed with respect to the stress when a certain level of stress is applied due to the property of the one-component dry-curing aqueous emulsion. Therefore, in order to apply a pavement material composition to a construction target surface having a curved surface or a concavo-convex surface in order to give a particularly aesthetic decoration, when trying to form a pavement material, during construction work, during drying, etc. Even at the stage, correction and deformation work according to the shape of the construction target surface can be easily performed. That is, post-correction after construction is possible. Thereby, even if it is a case where it redoes by failure of construction, etc., it becomes possible to adjust a shape easily and to adjust to a final form.

  On the other hand, the preparation method of the present invention is “a method for preparing the pavement material composition described above, which is performed at a construction site where the pavement material is applied, and is defined in advance from above the storage container in which the gravel aggregate is stored. A sprinkling step of sprinkling an amount of a one-component dry-curing aqueous emulsion, and the gravel-like aggregate, which is sprinkled on the gravel-like aggregate in the container, temporarily on the upper surface of the aggregate layer of the gravel-like aggregate An infiltration and standing step for allowing the aqueous emulsion of the formed emulsion layer to infiltrate downward according to gravity between the gravel-like aggregates, and the penetration of the aqueous emulsion into the aggregate layer are completed. And a composition take-out step of taking out the pavement composition in which the gravel aggregate and the aqueous emulsion are infiltrated and mixed from the container after the emulsion layer disappears.

  Therefore, according to the preparation method of the present invention, the gravel aggregate stored in the storage container and the aqueous emulsion mixed with the gravel aggregate are individually conveyed to the construction site. Then, both mixing and preparation work are performed at the construction site. At this time, the gravel-like aggregate stored in the storage container forms an aggregate layer exhibiting an appearance along the shape inside the container of the storage container. Then, the container lid of the storage container is opened, and the aqueous emulsion is sprinkled from above the aggregate layer stored in the storage container. The amount of the aqueous emulsion to be sprinkled is defined in advance by the weight and particle size of the gravel aggregate.

  At this time, immediately after the aqueous emulsion is sprinkled on the aggregate layer composed of the gravel-like aggregate that is contained, the aqueous emulsion immediately penetrates into the aggregate layer (between the gravel-like aggregates). Instead, a liquid layer (emulsion layer) of an aqueous emulsion is temporarily formed on the upper surface of the aggregate layer. Since the aggregate layer is a collection of a plurality of granular gravel aggregates, fine gaps are formed between the gravel aggregates. As a result, the temporarily formed aqueous emulsion of the emulsion layer gradually falls downward through the gap according to gravity. Therefore, the surface of each grain of the gravel-like aggregate is gradually permeated while being wetted with the aqueous emulsion, thereby creating a state in which the aqueous emulsion exists between the gravel-like aggregates. As a result, the emulsion layer finally disappears from the upper surface of the aggregate layer, and the gravel aggregate and the aqueous emulsion are infiltrated and mixed. In addition, when there is much aqueous emulsion with respect to gravel-like aggregate, aqueous emulsion will accumulate near the bottom part of the storage container accommodated, and on the other hand, when there is not enough aqueous emulsion, gravel-like bone near the bottom part will be collected. These conditions are not preferred because the aqueous emulsion may not reach the material. Therefore, the amount of the aqueous emulsion for the gravel aggregate needs to be measured strictly at the time of factory shipment.

  As a result, at the construction site, it is only necessary to sprinkle the aqueous emulsion on the gravel-like aggregate, and a great burden is not imposed on the contractor. Further, it does not require complicated mixing work unlike the two-component curing type, and management of the pot life is not so much required. Furthermore, the difference in the production area of gravel-like aggregates and the processing after sand collection does not rapidly increase the viscosity during construction by mixing the aqueous emulsion immediately before construction.

  Further, in the preparation method of the present invention, in addition to the above configuration, “a bag-like transparent resin sheet is interposed between the storage container and the gravel aggregate, and the composition removing step includes the gravel aggregate. And a kneading step of kneading the pavement composition by taking out the pavement composition into which the aqueous emulsion has permeated and mixed with the transparent resin sheet from the container and applying pressure from the outside of the transparent resin sheet; May be included.

  Therefore, according to the preparation method of the present invention, since the bag-like transparent resin sheet is provided in the storage container, the container inner wall of the storage container and the gravel aggregate are not in direct contact. Therefore, the aqueous emulsion sprinkled from above the gravel aggregate does not come into contact with the container inner wall, and it is not necessary to clean the container inner wall after the osmotic mixing. In addition, the gravel-like aggregate can be easily taken out from the container and is made of a transparent material. Therefore, the osmotic mixed state of the gravel-like aggregate and the aqueous emulsion (in other words, the wetness) is a transparent resin. It can be visually recognized from the outside of the seat.

  Here, the transparent resin sheet can be constructed using a flexible material made of polypropylene resin or the like, and can be easily deformed by an external pressure. For this reason, when a part where the infiltration mixing state is not very good is visually recognized, the wet condition can be made uniform by performing an operation of applying force by using a finger or a hand from the outside of the transparent resin sheet. It becomes possible to do. The said operation | work can be easily implemented after taking out from a storage container, and does not become a burden of a construction contractor. Furthermore, it is transported to the surface near the work target in a state of being accommodated in a transparent resin sheet, and is removed by evaporating from the bag while being applied little by little to prevent evaporation and drying of water in the water-based emulsion. Can be extended.

  According to the effect of the pavement composition of the present invention, without using any organic solvent, a one-part dry-curing type aqueous emulsion is used, and a contractor uses a prescribed amount of water based on gravel aggregates at the construction site. By simply sprinkling the emulsion, you can start construction work as it is. In other words, complicated preparation work at the construction site becomes unnecessary, and simple preparation work (mixing work) that does not impose a burden on the worker at the work site is sufficient, and the work burden and work mistakes of the contractor can be significantly reduced. . Furthermore, the problem that the hardening and viscosity of the aqueous emulsion increase due to the influence of the gravel-like aggregate that varies depending on the region where the product is produced and the sand collection conditions can solve the problem associated with the preparation immediately before the construction. In addition, measures such as fire and ventilation with respect to organic solvents and restrictions on handling are eased, and it is possible to perform construction indoors. In addition, by using an aqueous emulsion containing a polyvinyl alcohol component with a high degree of saponification, it can be used outdoors, and a soft material that can be deformed against stress can be used to correct paving materials for post-construction correction and rise. Construction becomes easy.

It is explanatory drawing which shows the structure of the (a) pavement material of this embodiment, and the gravel-like aggregate accommodated in the storage container (b). It is a flowchart which shows an example of the flow of the preparation method of a pavement material composition. It is explanatory drawing which shows typically an example of the flow of the preparation method of a paving material composition.

  Hereinafter, each of the pavement material composition 1, the pavement material 2, and the preparation method 3 which are one Embodiment of this invention is demonstrated based on FIG. 1 thru | or FIG. Here, FIG. 1 is an explanatory view showing (a) the configuration of the pavement material 2 and (b) the gravel aggregate 5 (hereinafter referred to as “aggregate 5”) accommodated in the storage container 4 of the present embodiment. FIG. 2 is a flowchart showing an example of the flow of the preparation method 3 of the pavement material composition 1, and FIG. 3 is a schematic diagram showing an example of the flow of the preparation method 3 of the pavement material composition 1.

  The pavement material composition 1 of this embodiment uses an aggregate 5 containing fine granular natural stone of about several millimeters, and an organic polymer mixed with the aggregate 5 and made of polypropylene resin or the like as a dispersant. And an aqueous emulsion 6 that is dispersed in water and prepared in an emulsified form. Here, the aggregate 5 and the aqueous emulsion 6 are conveyed to the construction site in a state where they are accommodated in separate containers. For example, the aggregate 5 is housed in a housing container 4 composed of a resinous 20 kg capacity polypeel can and supplied in a state where contact with the atmosphere or the like is blocked. At this time, a bag-like transparent resin sheet 7 is interposed between the container inner wall 4 a of the storage container 4 and the aggregate 5, and the aggregate 5 is contained in the transparent resin sheet 7. Is housed in. In the present embodiment, a colorless and transparent polypropylene resin sheet is used as the transparent resin sheet 7. Thereby, the state, color, etc. of the aggregate 5 accommodated from the outside can be visually recognized. Further, a thick material having a certain degree of strength is used so that it will not be broken by pressure applied from the outside after taking out, which will be described later.

  On the other hand, the aqueous emulsion 6 is stored in the liquid container 8 in a predetermined amount according to the weight of the aggregate 5 to be mixed, and is transported to the construction site. Here, the input amount of the aqueous emulsion 6 to the aggregate 5 is set in advance in a predetermined range (for example, 2.2 kg to 2.5 kg) depending on the type and particle size of the aggregate 5, and in the case of the present embodiment, It is set so that 2.2 kg of aqueous emulsion 6 is sprinkled on 20 kg of aggregate 5.

  The polyvinyl alcohol component contained in the aqueous emulsion 6 has a saponification degree of 95% or more, and has water resistance against rainwater after drying and curing. Here, it is known that about 98% of the saponification degree of the polyvinyl alcohol component is a theoretical upper limit value. In this embodiment, a polyvinyl alcohol component having a saponification degree in the range of 95% to 98% is used. Has been. Thereby, it becomes possible to construct the pavement material 2 having excellent weather resistance that does not deteriorate even if it is exposed to rainwater after drying and curing.

  Next, an example of the preparation method 3 of the pavement material composition 1 of the present embodiment will be described. Here, the aggregate 5 and the aqueous emulsion 6 individually accommodated using the storage container 4 and the liquid container 8 described above are conveyed to the construction site. Then, the lid 4b of the container 4 (polypel can) in which the aggregate 5 is accommodated is opened, and the bag mouth 7a of the transparent resin sheet 7 enclosing the aggregate 5 is opened to prepare for preparation. To do. Thereby, a part of aggregate 5 is exposed to air | atmosphere in the state accommodated in the storage container 4. FIG. Here, the poly pail can used as the container 4 is generally formed so that the diameter of the pail can decreases toward the bottom, and has an inverted trapezoidal shape when observed from the side. Therefore, the aggregate 5 filled in the polypeel can has an outer shape that substantially matches the inner shape of the polypeel can, and forms an aggregate layer 9 having a reverse truncated cone shape (FIG. 3A, etc.). reference).

  In the above state, the lid of the liquid container 8 of the aqueous emulsion 6 conveyed separately is opened, and a prescribed amount of the aqueous emulsion 6 is sprinkled from above the aggregate 5 (aggregate layer 9) (shaking step S1: FIG. 3). (See (b)). A space corresponding to the layer height of the emulsion layer 10 described later is provided on the upper end of the opening of the container 4 and the layer upper surface 9a of the aggregate layer 9. Here, the aqueous emulsion 6 sprinkled from above the aggregate layer 9 does not immediately penetrate into the aggregate layer 9, and the aggregate 5 (sand) is dry or the aggregate 5. When the particle size is small, the particles temporarily stay on the upper surface 9a of the aggregate layer 9. That is, the emulsion layer 10 made of the aqueous emulsion 6 is formed on the layer upper surface 9a (see FIG. 3C).

  Here, the aggregate layer 9 is formed by agglomerating fine granular aggregates 5, and there are minute voids through which the aqueous emulsion 6 can pass between the aggregates 5. Therefore, immediately after the shaking, the aqueous emulsion 6 that will form the emulsion layer 10 moves downward according to gravity through the gap. That is, it is gradually absorbed by the aggregate layer 9 so as to penetrate (permeate) the aggregate layer 9. And it leaves still until the aqueous | water-based emulsion 6 of the emulsion layer 10 permeate | transmits the inside of the aggregate layer 9 completely (osmosis stationary process S2: Refer FIG.3 (d)). At this time, the time until the infiltration is completed largely depends on the viscosity of the aqueous emulsion 6 to be used and the particle size of the aggregate 5. Here, although it is possible to use a low-viscosity aqueous emulsion that immediately starts penetrating into the aggregate layer 9 immediately after being shaken, the entire amount is collected near the bottom of the container 4, and the aggregate layer 9 is not biased up and down. May occur and is not considered suitable for use. On the other hand, a high-viscosity aqueous emulsion has a long stay in the upper surface 9a of the aggregate layer 9 and takes a long time to completely reach the lower part of the aggregate layer 9, and has practicality in construction work. Not. Therefore, in view of work efficiency at the construction site, it is considered preferable to use an aqueous emulsion 6 having an appropriate viscosity that completes the penetration in about 2 to 3 minutes.

  When the penetration of the aqueous emulsion 6 into the aggregate layer 9 is completed (emulsion layer 10 disappears), the preparation of the paving material composition 1 of the present embodiment is completed. That is, the pavement composition 1 of the present embodiment does not require the work of kneading or stirring the aggregate 5 and the aqueous emulsion 6 at the manufacturing factory or the construction site as in the past, and the labor of the operator Can be reduced.

  Thereafter, the pavement composition 1 composed of the aggregate 5 and the aqueous emulsion 6 is taken out from the storage container 4 in the transparent resin sheet 7 (composition removal step S3: see FIG. 3 (e)). Here, as for the transparent resin sheet 7, the pavement material composition 1 accommodated in the inside can be visually recognized as it is. Therefore, when the aggregate 5 and the aqueous emulsion 6 are not sufficiently mixed, in other words, the surface of the aggregate 5 may not be wet with the aqueous emulsion 6. For example, when a natural stone having a relatively large particle size is used, the flow path of the aqueous emulsion 6 may be fixed and may not sufficiently penetrate between the individual aggregates 5. In such a case, pressure is applied from the outside of the transparent resin sheet 7 to deform the flexible transparent resin sheet 7 so that the aggregate 5 and the aqueous emulsion 6 are squeezed out (kneading step S4). As a result, the mixed state of both becomes sufficient, and finally the preparation work of the paving material composition 1 is completed. Further, the bag-shaped transparent resin sheet 7 prevents the hand of the contractor and the inner portion of the container 4 from being stained with the aqueous emulsion 6. Therefore, it is possible to greatly reduce operations such as cleaning work and cleaning liquid processing at the construction site.

  In addition, in the flowchart of FIG. 2, a part of the flow of the process which forms the pavement material 2 using the prepared pavement material composition 1 with the said preparation method 3 is shown. As a result of the above preparation, it is possible to apply the pavement material composition 1 mixed in the transparent resin sheet 7 to the construction target surface 11 (coating step S5). At this time, when applying to the construction target surface 11 in a narrow space, only a necessary amount may be taken out little by little from the bag of the bag-like transparent resin sheet 7. On the other hand, when coating is performed on the wide construction target surface 11 at a time, the pavement material composition 1 in the transparent resin sheet 7 may be taken out at a time. In the present embodiment, a description of a general coating operation and a known operation such as a primer treatment before coating is omitted for the sake of brevity.

  Thereby, the pavement material composition 1 having a coating thickness of, for example, about 5 mm to 10 mm is applied on the base (construction target surface 11), and in this state, the one-part dry curing type of the pavement material composition 1 is applied. The pavement material 2 of this embodiment is formed by performing drying and curing treatment (curing step S6) of the aqueous emulsion 6 of this embodiment. In addition, although the process of drying and curing changes with time, temperature, etc., about 24 hours or more are required. That is, since the one-component dry-curing aqueous emulsion 6 is used, the time required for complete drying and curing is inevitably longer than that of a conventional two-component curing-type adhesive. Therefore, when the construction target surface is outdoors, pavement laid due to changes in the natural temperature, such as rain, night dew, condensation, or strong winds during curing, due to changes in the outside air temperature that take longer to dry and harden than usual. There may be fluctuations in the finish of the material 2 and the like. For this reason, it is necessary to select a period when the temperature change and climatic condition change are relatively small. In addition, a sheet for preventing rain or dust may be placed on the pavement 2 during curing to take measures to protect it from dust or the like.

  When the curing time elapses, the pavement material composition 1 is dried and cured, and is formed as the pavement material 2. At this time, by appropriately changing the color, type, size, and the like of the aggregate 5 to be kneaded with the aqueous emulsion 6, it is possible to construct the pavement 2 that exhibits an atmosphere that matches the surrounding landscape. Here, most of the aqueous emulsion 6 is colorless and transparent, or even when white or the like is used, it changes to colorless and transparent after drying, and is included inside when drying and curing are completed. The color and shape of the gravel aggregate 4 can be visually recognized. The pavement material 2 has a property that is easily deformable with respect to stress without causing cracks or chipping due to a strong impact, unlike a conventional one using a two-component curable adhesive. Therefore, it has the advantage that it can be deformed by a strong impact and can absorb the force.

  As described above, according to the pavement material composition 1 of the present embodiment, the aqueous emulsion 6 containing a polyvinyl alcohol component having a saponification degree of 95% or more is used and shaken from above the aggregate 5 at the construction site. It can be prepared by simply performing a simple work. Therefore, an excessive load is not imposed on the contractor. Furthermore, since the aggregate 5 and the aqueous emulsion 6 are mixed immediately before the construction and prepared as the paving material composition 1, it does not solidify during transportation, increases in viscosity, and does not become difficult to apply. In particular, the gravel aggregate 4 is produced from nature, and the effect of hardening and high viscosity due to sand collection conditions and subsequent processing can be reduced by the preparation method 3 concerned.

  The present invention has been described with reference to preferred embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention as described below. And design changes are possible.

  That is, in the preparation method 3 of the pavement material composition 1 of the present embodiment, pressure is applied from the outside to the pavement material composition 1 taken out together with the transparent resin sheet 7 to further mix the aggregate 5 and the aqueous emulsion 6. However, the present invention is not limited to this, as long as the aqueous emulsion 6 is sprinkled from above the aggregate 5 and can penetrate into the aggregate layer 9 sufficiently to achieve osmotic mixing. The kneading step S4 described above may be omitted. In this case, the configuration of the transparent resin sheet 7 can be omitted, and the aggregate 5 may be stored directly in the storage container 4.

1 Paving material composition 2 Paving material (paving material using paving material composition)
3 Preparation method (Preparation method of paving material composition)
4 Container 5 Aggregate (gravel-like aggregate)
6 Aqueous emulsion 7 Transparent resin sheet 7a Bag mouth 8 Liquid container 9 Aggregate layer 9a Top surface 10 Emulsion layer S1 Shaking process S2 Instillation standing process S3 Composition extraction process S4 Kneading process S5 Coating process S6 Curing process

Japanese Patent Application No. 2009-72670

Claims (5)

Gravel aggregate,
A one-component dry-curing type aqueous emulsion sprinkled from above at the construction site of the gravel-like aggregate and mixed with the gravel-like aggregate by penetrating between the gravel-like aggregates according to gravity. A pavement material composition characterized by that. The aqueous emulsion is
At least one organic polymer;
A polyvinyl alcohol component having a saponification degree of 95% or more mixed with the organic polymer;
It has water, The paving material composition of Claim 1 characterized by the above-mentioned. A pavement material using the pavement material composition according to claim 1 or 2,
Gravel aggregate,
A pavement sprinkled from above at the construction site of the gravel-like aggregate, and a one-component dry-curing type aqueous emulsion mixed with the gravel-like aggregate by penetrating between the gravel-like aggregates according to gravity. A pavement material formed by applying a material composition to a predetermined thickness, followed by drying and curing. A method for preparing a paving material composition according to claim 1 or 2,
A sprinkling step of sprinkling a predetermined amount of one-part dry-curing type aqueous emulsion from above the storage container in which gravel-like aggregates are stored, which is performed at a construction site for constructing pavement materials,
The aqueous emulsion of the emulsion layer sprinkled on the gravel-like aggregate and temporarily formed on the upper surface of the aggregate layer of the gravel-like aggregate in the container is interposed between the gravel-like aggregates. An osmotic standing step of standing so as to penetrate downward according to gravity;
After the permeation of the aqueous emulsion into the aggregate layer is completed and the emulsion layer disappears, a composition take-out step of taking out the pavement composition in which the gravel aggregate and the aqueous emulsion are permeated and mixed from the container A method for preparing a pavement composition comprising the steps of: A bag-like transparent resin sheet is interposed between the container and the gravel aggregate,
The composition removing step includes
The pavement composition in which the gravel-like aggregate and the aqueous emulsion are infiltrated and mixed is taken out of the container together with the transparent resin sheet, and the pavement composition is applied by applying pressure from the outside of the transparent resin sheet. The method for preparing a paving material composition according to claim 4, further comprising a kneading step of kneading.

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