JP2006219828A - Surface treating method and surface treating device for paving material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface treating method and a surface treating device for a paving material for easily eliminating a binder stuck to an exposed part of aggregate on the surface of the paving material. <P>SOLUTION: A mist-like liquid is sprayed onto the surface 1 of a molding block comprising at least the aggregate 3 and the binder 2 containing cement, or the surface 1 of the block is exposed to steam to eliminate the binder 2 stuck around the surface exposed part of the aggregate 3 on the surface 1 of the block. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for manufacturing a paving material in which the natural color of aggregate is exposed on the surface, and a manufacturing apparatus therefor.

  In recent years, including shopping streets, sidewalks, and parks, water permeability and non-water permeability using aggregates such as seed stones (for example, decorative stones) used for makeup in order to bring out natural colors in consideration of the landscape. A lot of pavement material made of conductive concrete has come to be used.

  In such a pavement, the block of the surface layer constituting the surface exposed to the outside uses a cement paste or cement mortar as a binder and aggregates are joined together. At this time, there was a problem that the binder adhered to the exposed portion of the aggregate on the surface of the paving material, and the effect of the aggregate, that is, the effect of the aggregate for cosmetic use was reduced.

In order to solve such problems, several methods for treating the surface of the pavement material and removing the binder attached to the surface have been disclosed (for example, see Patent Documents 1 to 4). In patent document 1, the method of grind | polishing the surface of a pavement material is proposed. Patent Document 2 proposes a method in which a setting retarder that delays solidification of cement or mortar as a binder is infiltrated into the surface layer of the pavement, and then sprayed with water to wash out the surface binder. Patent Document 3 proposes a method for washing out the binder adhering to the surface by spraying high-pressure water onto the surface of the pavement material. In patent document 4, the method of removing the binder adhering to the surface by brushing the surface of a pavement material is proposed.
JP-A-5-24955 JP 2001-39784 A JP 2001-269920 A JP 2003-49402 A

  However, the method according to Patent Document 1 has a problem that the surface of the pavement material is mirror-finished by polishing and becomes slippery in rainy weather. In addition, in the method according to Patent Document 2, since the concrete curing temperature and the amount of water contained in the binder are actually varied, it is difficult to remove the binder attached to the surface under certain conditions, and it is washed out with water. There was a problem that the aggregate moved and lost its shape. Further, in the method according to Patent Document 3, since a large amount of water is consumed, the cost is increased, and in addition, the treatment of waste water containing mortar and the like has been a problem. Further, in the method according to Patent Document 4, there has been a problem that the surface of the aggregate is easily peeled off or the aggregate is easily damaged by the surface brushing.

  As described above, in order to remove the binder adhering to the aggregate, there is only a technique that requires much labor and cost. Moreover, the above method has a possibility of impairing the appearance of the aggregate due to polishing, brushing or out of shape.

  Therefore, the present invention has been made in view of the above problems, and without deteriorating the appearance of the aggregate, the cement paste or cement mortar adhered to the exposed portion of the aggregate on the surface of the pavement is very much used. It is an object of the present invention to provide a surface treatment method and a surface treatment apparatus for a pavement that can be easily removed.

  In order to solve the above problems, the surface treatment method of a pavement material of the present invention is a method of treating the surface of a block-shaped pavement material in which aggregates are joined together using a paste or mortar containing at least cement as a binder, A step of producing a block material by kneading the binder and aggregate, a step of forming the block material into a block shape, a mist-like shape on the block surface at a timing after the block shape is formed and before the binder is cured. And a step of removing a binder attached around the exposed surface portion of the aggregate in the surface layer of the block by spraying a liquid.

  Thereby, the binder adhering to the exposed portion of the aggregate on the surface of the pavement can be removed very easily without impairing the appearance of the aggregate. That is, according to the present invention, by spraying a mist-like liquid, the binder adhering to the periphery of the exposed surface portion of the aggregate in the surface layer of the block is removed, so that the coupling between the aggregates is not disturbed. The binder in the surface layer of the block can be removed. Moreover, since the mist-like liquid is used, it is easy to permeate the inside of the binder, and the fluidity of the binder can be improved. As a result, it becomes easy to remove the binder attached around the exposed surface portion of the aggregate in the surface layer of the block. In addition, in order to further promote this action, the temperature of the liquid may be set higher than normal temperature (room temperature).

  In the surface treatment method having the above-described configuration, an organic solvent such as water, alcohols, and acetone can be used. Of these, water is preferred because it is easy to handle.

  In this case, the binder adhering to the exposed portion of the aggregate on the surface of the pavement can be removed with a very simple device that is exposed to water vapor without impairing the appearance of the aggregate. In this case, since the water does not ooze out of the pavement material, no waste liquid treatment is required.

  Further, according to the present invention, the binder removed by the liquid such as mist-like water or the vapor such as water vapor penetrates into the block and stays in the block, so that the mechanical properties of the block are enhanced. can do.

  Moreover, in the surface treatment method of the said structure, it is preferable that the particle diameter of a mist-like liquid is 1000 micrometers or less, and it is more preferable that it is 300 micrometers or less.

  When the particle size of the mist-like liquid is 300 μm or less, the interaction between the binder and the liquid proceeds more rapidly, and the binder can be removed more rapidly. In this case, the binder is removed within a few minutes after the mist-like liquid is sprayed on the surface of the pavement.

  In addition, a part or all of the removed binder stays inside the block.For example, the binder further adheres to a gap generated at the contact portion between the aggregates inside the block, thereby increasing the bonding strength between the aggregates. It also becomes.

  Further, in the surface treatment method described above, a gas such as air may be injected after removing the binder attached around the exposed surface portion of the aggregate in the surface layer of the block. As a result, the water containing the binder component remaining on the surface of the aggregate can be removed, and as a result, a more vivid and natural-colored aggregate can be exposed on the surface.

  In order to solve the above-mentioned problems, the surface treatment method for a pavement according to the present invention is a method for treating the surface of a block-shaped pavement in which aggregates are joined using at least cement-containing paste or mortar as a binder. Then, the block and the aggregate are kneaded to produce a block material, the block material is formed into a block shape, and the block surface is steamed at the timing after the block shape is formed and before the binder is completely cured. And removing the binder adhering to the periphery of the exposed surface portion of the aggregate in the surface layer of the block.

  In this method, the vapor has a very high interaction with the binder, and even when the binder is hardened, the binder can be removed if the binder is not yet hardened. Also, the amount of vapor exposed to the block surface may be very small. When the vapor is liquefied, the binder is simultaneously melted, and a very fine liquid in which the binder is dissolved penetrates into the block. Accordingly, not all waste liquid treatment is required, and all the binder uniformly penetrates into the block, so that no waste liquid is generated. In particular, it is preferable that the steam is water vapor, and the above-described effects are prominent when the steam is water vapor.

  In addition, all of the removed binder stays inside the block, and the binder adheres more uniformly to the gap, resulting in an increase in the bonding strength between the aggregates.

  Also in this case, in order to expose the aggregate with a clear and natural color on the surface, after removing the binder adhering to the surface exposed portion of the aggregate in the surface layer of the block, gas such as air is removed. You may spray.

  In order to solve the above problems, the surface treatment apparatus for a pavement material according to the present invention treats the surface of a block-shaped pavement material in which aggregates are bonded together using at least a cement-containing paste or mortar as a binder, A device for removing the binder adhering to the periphery of the exposed surface portion of the aggregate in the surface layer, the means for uniformly spraying a mist-like liquid over the entire block surface of the paving material, and the particle size of the liquid is 1 It is characterized by comprising means for adjusting to ˜1000 μm and means for adjusting the temperature of the liquid to any temperature between room temperature and the boiling point of the liquid.

  Thereby, the binder adhering to the exposed portion of the aggregate on the surface of the pavement can be removed very easily without impairing the appearance of the aggregate. That is, according to the present invention, by spraying a mist-like liquid, the binder adhering to the periphery of the exposed surface portion of the aggregate in the surface layer of the block is removed, so that the coupling between the aggregates is not disturbed. The binder in the surface layer of the block can be removed. Moreover, since the mist-like liquid is used, it is easy to permeate the inside of the binder, and the fluidity of the binder can be improved. As a result, it becomes easy to remove the binder attached around the exposed surface portion of the aggregate in the surface layer of the block. In addition, in order to further promote this action, the temperature of the liquid may be set higher than normal temperature (room temperature).

  Moreover, in the said structure, it is preferable that the particle diameter of a mist-like liquid is 1000 micrometers or less, and it is more preferable that it is 300 micrometers or less. That is, when the particle size of the mist-like liquid is 300 μm or less, the interaction between the binder and the liquid proceeds more quickly, and the binder can be removed more rapidly. In this case, the binder is removed within a few minutes after the mist-like liquid is sprayed on the surface of the pavement. At this time, a part or all of the removed binder stays inside the block. For example, the binder further adheres to a gap formed at the contact portion between the aggregates inside the block, thereby increasing the bonding strength between the aggregates. It will be a result.

  In addition, the surface treatment apparatus for a pavement according to the present invention treats the surface of a block-shaped pavement in which aggregates are joined using at least a cement-containing paste or mortar as a binder, and the aggregate in the surface layer of the block. An apparatus for removing a binder adhering to the periphery of a surface exposed portion, characterized by comprising means for generating steam and means for uniformly applying steam to the entire block surface of the paving material.

  This also has the same effect as the surface treatment apparatus for a pavement agent of the present invention, and the waste liquid that removes the binder adhering to the exposed portion of the aggregate on the surface of the pavement very easily. It is possible to provide a device that does not require any processing.

  Further, according to the present invention, the binder attached to the exposed portion of the aggregate on the surface of the pavement is removed with a very simple device that is exposed to steam without deteriorating the appearance of the aggregate. be able to. In this case, since the liquid consisting of vapor does not ooze out of the pavement material, no waste liquid treatment is required.

  Further, according to the present invention, the binder removed by the liquid such as mist-like water or the vapor such as water vapor penetrates into the block and stays in the block, so that the mechanical properties of the block are enhanced. can do.

  By the surface treatment method of a pavement material or the surface treatment apparatus of the present invention, the binder adhered to the exposed portion of the aggregate on the surface of the pavement without damaging the appearance of the aggregate, such as mist-like water The liquid can be removed by a very simple method or apparatus in which the liquid is sprayed on the surface of the pavement material or vapor such as water vapor is exposed to the surface of the pavement material. In this case, since it can be performed with a very small amount of liquid or vapor, almost no treatment of the waste liquid is required.

  In these pavement surface treatment methods or surface treatment devices, since no load is applied to the aggregate when removing the binder, the bond strength between the binder and the aggregate of the molded block before curing is determined. Even if you don't mind, there will be no flaking or loss of shape of the aggregate. Accordingly, the pavement material by the surface treatment method or the surface treatment apparatus of the present invention is limited by the mixing ratio of the binder and the aggregate, the size and shape of the aggregate, and whether the block is a water permeable block or a water impermeable block. It can be applied to all kinds of paving materials using aggregates.

  As described above, by the surface treatment of the pavement according to the present invention, the binder attached to the exposed portion of the aggregate on the surface of the pavement can be removed very easily.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In the embodiment of the present invention, the present invention can be applied to all kinds of pavement materials using cement paste or cement mortar as a binder and decorative stone as an aggregate.

  For forming these paving materials into block shapes, generally known processes are employed. First, cement paste or cement mortar (hereinafter referred to as a binder) and decorative stone (hereinafter referred to as aggregate) are used. Mix and add water and knead using a concrete mixer or the like to obtain a block material for molding. Using this block material, it is molded into a block shape using a mold of an appropriate size. Molding is performed, for example, by vibration pressure molding.

  In general, for pavement materials, the mixture of binder and the size of the aggregate are adjusted to eliminate the voids and the permeable concrete block formed so that there is a void between the aggregate and the aggregate. It can be distinguished from a non-permeable concrete block pavement formed so as to be filled with a binder.

  Below, the case of the water-permeable concrete block and the non-water-permeable concrete block is taken as an example, and the method of removing the binder adhering to the exposed part of the aggregate on the surface of these blocks will be described.

  FIG. 1 schematically shows the surface treatment of a permeable concrete block. Moreover, FIG. 2 has shown typically the mode of the surface treatment of a water-impermeable concrete block.

  Removal of the binder adhering to the surface of the aggregate of the molded body block is performed on the molded body block after completion of the molding process.

  Fig.1 (a) and FIG.2 (a) have shown the state of the surface layer part containing the molded object block surface 1 before surface treatment with sectional drawing. In the case of a water-permeable concrete block (see FIG. 1A), the aggregate 3 is not so densely filled and there are voids 4 that are not filled with the binder 2. On the other hand, in the case of the non-permeable concrete block (see FIG. 2A), the aggregate 3 is more densely filled than in the case of the permeable concrete block, and the gap 5 generated between the aggregates 3 is the binder 2. Filled with.

  Next, the binder adhering to the surface 1 of the molded body block is removed. The binder 2 attached to the surface 1 of the molded body block is removed by a method of spraying a mist-like liquid onto the surface 1 of the block or a method of exposing water vapor to the surface 1 of the molded body block.

  When spraying a mist-like liquid on the surface 1 of a block, first, a mist-like liquid is sprayed over the whole surface 1 of a molded object block using a spraying apparatus (illustration omitted). In this description, water is used as the liquid. It is preferable to perform spraying of mist-like water within 10-30 after shaping | molding into a block shape. When it is performed after one hour has elapsed, the binder 2 covering the aggregate 3 is hardened, so that it takes time to remove the binder 2. If 24 hours have passed since molding, the binder 2 can no longer be removed.

  For example, the amount of water to be sprayed is calculated from the apparent surface area of the molded body block, although it varies depending on the type of the binder 2 used in the molded body block and the adhesion amount of the binder 2. The “apparent surface area” simply refers to the surface area obtained from the geometric size of the block.

  The binder 2 adhering to the aggregate 3 on the surface 1 of these molded body blocks is washed out with water and removed.

  FIG.1 (b) and FIG.2 (b) have shown the state of the surface layer part containing the molded object block surface 1 after surface treatment with sectional drawing. In the case of the water permeable block (see FIG. 1B), the binder 2 on the block surface 1 is removed to such an extent that the binder surface 2 is not substantially visually observed. Moreover, also in the case of a water-impermeable block (refer FIG.2 (b)), the binder 2 of the block surface 1 is removed. However, in the case of the non-permeable block as shown in FIG. 2, the gap 5 generated between the aggregates 3 is filled with the binder 2, so that the binder 2 is not completely washed out and the binder in the gap 5 portion. 2 remains unremoved.

  In the method of exposing water vapor to the surface 1 of the molded body block, the surface 1 of the molded body block 1 is treated by exposing the entire surface 1 of the molded body block to water vapor using a water vapor generator (not shown). And after performing surface treatment, it is set as a pavement material through the manufacturing process of general pavement materials, such as curing a block.

  In the present embodiment, the binder 2 attached to the aggregate 3 on the surface 1 of the molded body block is removed using mist-like water or water vapor, but this is a preferred example. However, the present invention is not limited to this, and it is not necessary to use water as long as it is a mist-like liquid or vapor. For example, an organic solvent such as alcohols or acetone may be used. However, it is preferable to use water in consideration of cost and workability. The temperature of the water may be room temperature water or about 3 ° C. The temperature of water may be higher than room temperature (for example, a temperature close to 100 ° C.). It is considered that the higher the water temperature, the more efficiently the binder can be removed. Moreover, it is preferable that the particle diameter of mist-like water is 1000 micrometers or less. More preferably, it is 300 μm or less. In addition, the minimum of the particle size is about 1 micrometer.

  Further, the decorative stone is used as the aggregate, but the decorative stone is not necessarily used, and the size and weight thereof are not limited and can be arbitrarily changed.

  In this embodiment, cement paste or cement mortar is used as the binder. However, this is a preferable example, and other embodiments may be used as long as cement is contained. For example, a polymer may be mixed as an auxiliary.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to this Example.

  In this example, a pavement material for a water-permeable concrete block composed of a surface layer portion and a foundation portion was produced. And the surface of the surface layer part of this pavement material was processed.

  Table 1 shows the blending of raw materials for producing the pavement material of this example.

舗装材の表層部分の表層用コンクリートは、白色ポルトランドセメント（太平洋セメント（株）製）をバインダに、７号砕砂を骨材に使用した。

As the surface layer concrete of the surface layer portion of the pavement material, white Portland cement (manufactured by Taiheiyo Cement Co., Ltd.) was used as a binder, and No. 7 crushed sand was used as an aggregate.

  Moreover, the concrete for the base layer of the base layer portion of the pavement material used normal Portland cement (manufactured by Taiheiyo Cement Co., Ltd.) as a binder and blast furnace slag as an aggregate.

  The pavement material was prepared by first kneading the surface layer portion and the base portion separately with the raw material composition shown in Table 1 to obtain the respective block materials. These block materials were used to form a block shape using a 300 × 300 × 60 mm mold. Molding was performed by vibration pressure molding with the vibration time of the concrete block molding machine for immediate removal set to 5 seconds. At the time of molding, the surface layer portion was 10 mm so that the base layer portion had a thickness of 50 mm.

  Immediately after such a molding step, the block-shaped molded body was removed. Then, about 2 minutes later, using a spraying device, sprayed sprayed water at room temperature (about 20 ° C.) evenly over the entire block surface (surface of the surface layer portion).

  Thus, a block-shaped molded body was obtained in which the cement paste adhering to the surface of the aggregate exposed on the surface of the surface concrete was washed out with water.

  Finally, the molded body was heated to 60 ° C. at a rate of temperature increase of 15 ° C./hour, held at 60 ° C. for 4 hours, and then naturally cooled to room temperature, whereby water-permeable water with no cement paste attached to the surface. A concrete pavement material was obtained.

  Further, in the case of washing out with water vapor, block molding was performed in exactly the same process as in the case of washing out by spraying the above-described mist-like liquid, and the block-shaped molded body was immediately demolded after the process. Thereafter, the steam was uniformly exposed to the entire block surface (surface of the surface layer portion) using an apparatus for generating steam after about 2 minutes to wash out the block.

  Then, as in the case of washing out by spraying the above-described mist-like liquid, finally, the molded body was heated to 60 ° C. at a temperature rising rate of 15 ° C./hour and held at 60 ° C. for 4 hours. As a result, the pavement material of a water-permeable concrete block with no cement paste attached to the surface was obtained.

  The present invention can be implemented in various other forms without departing from the spirit or main features thereof. Therefore, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is indicated by the claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  The present invention is particularly useful for concrete blocks.

The mode of the surface treatment of the water-permeable concrete block which concerns on embodiment of this invention is shown typically, (a) is sectional drawing explaining the state of the block surface before surface treatment, (b) is after surface treatment It is sectional drawing explaining the state of the block surface. The mode of the surface treatment of the impermeable concrete block which concerns on embodiment of this invention is shown typically, (a) is sectional drawing explaining the state of the block surface before surface treatment, (b) is surface treatment. It is sectional drawing explaining the state of the back block surface.

Explanation of symbols

1 Block surface 2 Binder (paste or mortar)
3 Aggregate 4 Gap 5 Gap

Claims (9)

It is a method of treating the surface of a block-shaped pavement material in which aggregates are joined together using a paste or mortar containing at least cement as a binder,
Kneading the binder and the aggregate to produce a block material;
Forming the block material into a block shape;
After forming into a block shape, by spraying a mist-like liquid on the block surface at a timing before the hardening of the binder proceeds, it adheres around the exposed surface portion of the aggregate in the surface layer of the block And a step of removing the binder.   The pavement surface treatment method according to claim 1, wherein the mist-like liquid is water.   The particle size of the mist-like liquid is 300 µm or less, The method for producing a pavement material according to claim 1 or 2. It is a method of treating the surface of a block-shaped pavement material in which aggregates are joined together using a paste or mortar containing at least cement as a binder,
Kneading the binder and the aggregate to produce a block material;
Forming the block material into a block shape;
After forming into a block shape, the binder adhering around the exposed surface portion of the aggregate in the surface layer of the block is removed by exposing the block surface to steam at a timing before the binder is completely cured. A surface treatment method for a paving material, comprising: a step.   The surface treatment method for a paving material according to claim 4, wherein the steam is steam.   The surface treatment method for a pavement according to any one of claims 1 to 5, further comprising a step of injecting air onto the block surface after the step of removing the binder. Treating the surface of a block-shaped paving material in which aggregates are joined using a paste or mortar containing at least cement as a binder, and removing the binder adhering to the periphery of the surface exposed portion of the aggregate in the surface layer of the block A device for performing
Means for spraying a mist-like liquid uniformly on the entire block surface of the paving material;
Means for adjusting the particle size of the liquid to 1-1000 μm;
A pavement surface treatment apparatus comprising: a means for adjusting the temperature of the liquid to an arbitrary temperature between room temperature and the boiling point of the liquid. Treating the surface of a block-shaped paving material in which aggregates are joined using a paste or mortar containing at least cement as a binder, and removing the binder adhering to the periphery of the surface exposed portion of the aggregate in the surface layer of the block A device for performing
Means for generating steam;
A surface treatment apparatus for a paving material, characterized in that steam is uniformly applied to the entire block surface of the paving material.   The surface treatment method for a paving material according to claim 8, wherein the steam is steam.

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