JP5926563B2 - Block pavement construction method - Google Patents

Description

The present invention relates to a block pavement construction method formed by laying a plurality of paving blocks with a mortar interposed between them and a base layer.

  As a pavement that constitutes the surface layer part of the sidewalk and roadway, in addition to asphalt pavement and concrete pavement, stone-pasted block pavement is generally known, and according to this block pavement, a paved surface excellent in landscape is formed. Is possible.

  Further, as a pavement structure for forming a block pavement, for example, as shown in FIG. 3, for example, cementtro 51 is spread on a base layer 50 made of foundation concrete, asphalt concrete, a crushed stone base, etc. For example, basa mortar in which cement and river sand are mixed at a ratio of 1: 3 is spread as a mortar 52, for example, with a thickness of about 30 mm, and then the cement tro 51 is sprayed on the top surface of the spread mortar 52. A block pavement structure is formed by laying a plurality of paving blocks (paving stones) 53 vertically and horizontally on these and filling joints mortar 55 in joints 54 between the paved blocks 53 arranged side by side. Generally known (see, for example, Non-Patent Document 1).

“Scenic Stone and Pavement”, January 20, 1994, published by Gihodo Publishing Co., Ltd., pages 107-116

  However, in the block pavement structure using the above-mentioned conventional mortar made of Basa mortar, especially when block pavement is used in the roadway section, the limit bending strain of the block pavement integrated with the pavement block after the mortar solidifies Is not so large, for example, the floor mortar is easily damaged by a load from above by a vehicle or the like, and may cause cracks in the paving block. Moreover, since the adhesive force between the floor mortar and the paving block by cementtro is not sufficient, the paving block may be peeled off from the floor mortar. Furthermore, the joint mortar filled in the joint between the paving blocks arranged side by side is also inferior in elasticity, so the joint mortar may peel off from the joint.

The present invention can effectively increase the limit bending strain of block pavement after the mortar is solidified, and can effectively improve the adhesive force between the mortar and the paving block. The purpose is to provide a construction method .

Moreover, an object of this invention is to provide the construction method of the block pavement which can improve the elasticity of the joint mortar with which the joint part between the arranged blocks for paving was filled effectively.

The present invention relates to a block pavement construction method formed by laying a plurality of paving blocks with a mortar interposed between the base layer and the thermoplastic resin in the mortar or on the surface of the mortar. A material and a metal material are blended or laid, and after laying the paving block on the mortar, the metal material is heated by applying electromagnetic induction from above the paving block, A step of softening the thermoplastic material, and a step of filling joints in the joints between the plurality of paving blocks laid out, and the thermoplastic material is blended in the joints mortar, Bro the blending ratio of the thermoplastic material that is blended into the mortar, which is larger than the blending ratio of the thermoplastic material formulated in the insole mortar By providing a method of constructing click pavement is obtained by achieving the above object.

  In the block pavement construction method of the present invention, the thermoplastic material is preferably a thermoplastic resin.

  In the block pavement construction method of the present invention, the metal material is preferably a metal net.

According to the block pavement construction method of the present invention, the limit bending strain of the block pavement after the mortar is solidified can be effectively increased, and the adhesive force between the mortar and the paving block can be effectively increased. Can be improved.

Moreover, according to the construction method of the block pavement of this invention, the elasticity of the joint mortar with which the joint part between the arranged blocks for pavement was filled can be improved effectively.

1 is a schematic cross-sectional view illustrating a block pavement construction method and a block pavement structure according to a preferred first embodiment of the present invention. It is a schematic sectional drawing explaining the construction method and block pavement structure of block pavement concerning 2nd Embodiment with preferable this invention. It is a schematic sectional drawing explaining the conventional rock pavement structure.

  A block pavement structure 10 according to a preferred first embodiment of the present invention shown in FIG. 1 is formed by a block pavement construction method described later, and is excellent in durability and, for example, a plurality of pavement structures arranged vertically and horizontally. The pavement block (paving stone) 11 constitutes a surface layer portion of the roadway that is excellent in aesthetics. In the block pavement structure 10 of the first embodiment, the mortar 12 includes a thermoplastic material, so that the mortar 12 may be damaged or the pavement block 11 may be repeatedly subjected to a traveling load from a vehicle, for example. It has a function of effectively preventing the occurrence of cracks over a long period of time. Moreover, the block pavement structure 10 of this 1st Embodiment improves the adhesive force with the block 11 for paving | paving because the thermoplastic material was heated and softened when the floor mortar 12 solidified, and the block 11 for paving | paving is It is provided with a function for effectively avoiding peeling from the mortar 12 over a long period of time.

  And the construction method of the block pavement of the first embodiment is a construction method of forming a block pavement by arranging a plurality of paving blocks 11 with a mortar 12 interposed between the base layer 13 and the mortar. 12 is blended with a thermoplastic material, and a metal material 14 is laid in the floor mortar 12. After the paving blocks 11 are laid on the floor mortar 12, the upper side of the paving block 11 is Heating the metal material 14 by applying electromagnetic induction includes softening the thermoplastic material.

  As a result, the block pavement structure 10 of the first embodiment includes a floor mortar layer 15 formed on the base layer 13 by the floor mortar 12 containing the thermoplastic material and the metal material 14, and the floor mortar layer 15 And a plurality of paving blocks 11 arranged on top of each other.

  In addition, the block pavement construction method of the first embodiment includes a step of filling joints mortar 17 into joints 16 between a plurality of paving blocks 11 laid out side by side, and the joint mortar 17 is thermoplastic. Ingredients are blended.

  Thus, in the block pavement structure 10 of the first embodiment, the joint mortar 17 containing the thermoplastic material is filled in the joint portions 16 between the plurality of paved blocks 11 arranged. .

  In this 1st Embodiment, the base layer 13 used as the support layer of the block pavement structure 10 consists of foundation concrete formed on the roadbed layer 20 by a crushed stone roadbed like the conventional block pavement structure, for example. Moreover, the base layer 13 can also be formed using asphalt concrete, asphalt pavement material, a concrete floor board, a crushed stone base, etc.

  In the first embodiment, the base mortar 12 containing a thermoplastic material is laid on the base layer 13. The floor mortar 12 contains water, cement, fine aggregate, and a thermoplastic material in a predetermined blending amount suitable for use as a floor mortar for block paving, and, if necessary, other mortars. Formed by mixing admixtures.

  Here, examples of the cement blended in the floor mortar 12 include known ordinary Portland cement, early-strength Portland cement, super-early-strength Portland cement, moderately hot Portland cement, blast furnace cement, silica cement, fly ash cement, and the like. Various cements can be used.

  As the fine aggregate to be blended in the mortar 12, various known fine aggregates such as river sand, hill sand, mountain sand, screenings, silica sand, limestone and volcanic rock can be used.

  As other admixtures to be mixed with the bed mortar 12, various known admixtures such as a rapid hardening admixture, a setting modifier, and an expandable admixture can be used.

  In the first embodiment, a thermoplastic material is blended in the mortar 12. The thermoplastic material blended in the mortar 12 includes polyolefins such as polyethylene and polyethylene terephthalate, polystyrene, polypropylene, polyvinyl acetate, polyamide, polyamideimide, ethylene-vinyl acetate copolymer (EVA), urethane, SBR, CR And the like; and bituminous materials such as asphalt and tar; and the like. These can be used alone or in combination of two or more. Moreover, it is preferable to use a thermoplastic resin as the thermoplastic material. Among thermoplastic resins, particularly polyamides, polyolefins, urethanes, EVAs, etc. have melting points that match the heating temperatures assumed by heating with electromagnetic induction heating of the metal material 14, and are suitable for hot melts. Therefore, it is preferably used in the present invention. Among thermoplastic resins, especially polyamides, polyolefins, urethanes, EVAs and the like are blended in the mortar 12 together with bitumen materials such as asphalt and tar, and are familiar with the bitumen materials when heated and melted. Since it is good, it is preferably used in the present invention. Furthermore, the shape of the thermoplastic resin is not particularly limited, and examples thereof include a sheet shape, a granular shape (pellet shape), and a powder shape. In the first embodiment, for example, asphalt waste fine particles and a thermoplastic resin such as EVA are blended as a thermoplastic material.

  The thermoplastic material preferably used in the present invention has a softening point (melting point) in the range of 40 to 150 ° C., particularly 60 to 90 ° C., and is heated with the electromagnetic induction heating of the metal material 14. It is preferable because it has a melting point that matches the heating temperature assumed in (1) and is suitable for hot melt. The softening point (melting point) of the thermoplastic material can be measured in accordance with, for example, JIS K7121, JIS K7121, and JIS K7206.

  Each material of the mortar 12 blended as described above is mixed with a predetermined blending amount of water, for example, by a mixing mixer, and is not yet solidified before solidification, as in the conventional construction method. For example, the mortar layer 15 is formed by laying and leveling with a thickness of about 30 mm.

  In the first embodiment, when spreading the mortar 12 on the base layer 13, the metal material 14 is preferably disposed in the middle of the mortar layer 15, for example, in the central portion in the thickness direction of the mortar layer 15. It is laid to be embedded.

  Here, in the present invention, the metal material blended in the floor mortar or laid on the surface of the floor mortar or the surface of the floor mortar is particularly a material as long as it is conductive and has an appropriate electrical resistance. There is no restriction | limiting, For example, iron, stainless steel, copper, aluminum, aluminum alloy etc. can be used. These 1 type can also be used individually or in combination of 2 or more types. In addition, the shape of the metal material is not particularly limited. For example, a sheet shape, a film shape, a net shape, or the like that can form front and back surfaces of a certain area, a spherical shape or an irregular shape (an irregular shape). For example, those having various shapes such as those having an irregular shape or those having an irregular shape), powders such as iron sand, or fibers such as steel wool. Among these metal materials, iron mesh is inexpensive and stainless steel does not rust, so it is preferably used in the present invention. The iron mesh also does not rust after being rapidly oxidized by electromagnetic induction heating. These metal nets, such as an iron net and a stainless steel net, are embedded in the underlay mortar layer 15 so as to be integrated with the underlay mortar layer 15 to reinforce the bending strength of the underlay mortar layer 15. When the metal material is granular or powdery such as iron sand, it is mixed in the mortar 12 and mixed with other materials using a mixing mixer or the like to be contained in the mortar layer 15. You can also. In the first embodiment, as the metal material 14, for example, a # 5 mm iron net is laid in the mortar 12 and embedded in the mortar layer 15.

  When the mortar layer 15 is formed by spreading the mortar 12 on the base layer 13 and the mortar layer 15 is not yet solidified, a plurality of paving blocks 11 are placed on the mortar 12 adjacent to the pavement. The joints 16 having a width of, for example, about 3 to 15 mm are formed between the blocks 11 and are laid out vertically and horizontally by the same method as the conventional construction method.

  Here, as the paving blocks used in the present invention, various known paving blocks known as block paving block materials such as concrete flat plates, bricks, natural stones, ceramics, glass, tiles, interlocking blocks, elastic blocks, etc. A block can be used, and its shape is not particularly limited. In the first embodiment, a concrete block material having a square planar shape of, for example, about 300 to 500 mm in length and having a thickness of about 20 to 200 mm can be used as the paving block 11.

  When a plurality of paving blocks 11 are laid out vertically and horizontally on the floor mortar 12, the floor mortar layer 15 is not yet solidified, and between adjacent paving blocks 12 by a method similar to the conventional construction method. The formed joint portion 16 is filled with joint mortar 17. In the first embodiment, a thermoplastic material is blended in the joint mortar 17.

  The joint mortar 17 is blended with water, cement, fine aggregate, and thermoplastic material in a predetermined blending amount suitable for use as a joint mortar for block paving, like the mortar 12. It is formed by mixing other admixtures as necessary. As the thermoplastic material blended in the joint mortar 17, as in the case of the mortar 12, polyolefin such as polyethylene and polyethylene terephthalate, polystyrene, polypropylene, polyvinyl acetate, polyamide, polyamideimide, ethylene-vinyl acetate copolymer (EVA) ), Thermoplastic resins such as urethane, SBR, CR, etc .; bitumen materials such as asphalt, tar, etc .; these can be used alone or in combination of two or more. Moreover, it is preferable to use a thermoplastic resin as the thermoplastic material. Among thermoplastic resins, especially polyamides, polyolefins, urethanes, EVAs, etc. have melting points that match the expected heating temperature when heated by electromagnetic induction heating of the metal material 14 laid on the mortar 12. Since it is suitable for hot melt, it is preferably used in the present invention.

In the first embodiment, the blending ratio of the thermoplastic material blended in the joint mortar 17 is larger than the blending ratio of the thermoplastic material blended in the mat mortar 12 . The blending ratio of the thermoplastic material blended in the joint mortar 17 is higher than the blending ratio of the thermoplastic material blended in the mat mortar 12, thereby improving the elasticity of the joint mortar 17. The effect of preventing the joint mortar 17 from peeling off from the joint portion 16 can be more efficiently exhibited.

  In the first embodiment, the pavement blocks 11 are laid out on the mortar 12, and the joint mortar 17 is filled in the joints 16 of the pavement block 12, before the mortar layer 15 is solidified. The metal material 14 is heated by electromagnetic induction from above the paving block 11 to soften the thermoplastic material contained in the mortar 12 and the joint mortar 17.

  Here, as an apparatus for heating the metal material 14 contained in the mortar layer 15 from above the paving block 11 by electromagnetic induction, for example, substantially the same as the electromagnetic induction coil unit described in Japanese Patent Application Laid-Open No. 2007-291839. An electromagnetic induction heating device (IH remover) 18 having the following structure can be used. The electromagnetic induction heating device 18 includes an electromagnetic induction coil in the same manner as the electromagnetic induction coil unit described in Japanese Patent Application Laid-Open No. 2007-291839. For example, by supplying high frequency power to the electromagnetic induction coil via an electric cable from a high frequency power generator (not shown), eddy current due to electromagnetic induction is applied to the metal material 14 embedded in the mortar layer 15. By generating it, the metal material 14 is caused to generate heat by the electric resistance of the metal material 14. When the base mortar layer 15 and the joint mortar 17 are heated by the heat generation of the metal material 14 and reach the softening point (melting point) of the thermoplastic material, the thermoplastic material contained therein is softened and melted.

  Further, in the first embodiment, the metal material 14 is moved by moving the electromagnetic induction heating device 18 at a speed of, for example, 5 to 200 cm / min along the upper surface of the paved blocks 11 arranged. The thermoplastic material contained in the mortar layer 15 and the joint mortar 17 can be heated and melted sequentially by generating heat sequentially. The mortar layer 15 and joint mortar 17 in which the contained thermoplastic materials are sequentially heated and melted are solidified as time passes, and the heat-melted thermoplastic material is cured by returning to room temperature. As a result, the block pavement structure 10 of the first embodiment in which the floor mortar 12, the plurality of paving blocks 11, and the joint mortar 17 are integrated is formed.

  And according to the block pavement construction method and the block pavement structure 10 of the first embodiment having the above-described configuration, it is possible to effectively increase the limit bending strain of the block pavement after the mortar 12 is solidified. At the same time, the adhesive force between the mortar 12 and the paving block 11 can be effectively improved.

  That is, according to the first embodiment, the thermoplastic material is blended in the mortar 12 and the metal material 14 is laid in the mortar 12, and the paving block 11 is placed on the mortar 12. After laying and arranging, the block pavement structure 10 is formed through a process of heating the metal material 14 by applying electromagnetic induction from above the pavement block 11 and softening the thermoplastic material. Therefore, according to the first embodiment, the mortar 12 is still hardened in addition to the fact that the limit bending strain of the entire block pavement is increased because the mortar 12 includes the thermoplastic material. As the thermoplastic material is heated by electromagnetic induction heating of the metal material 14 and is softened and melted in the process of solidifying from the state in which no thermoplastic resin is solidified, the thermoplastic material is more closely integrated with the fine aggregates in the mortar 12 and the like. Therefore, it becomes possible to improve the critical bending strain in a more stable state. As a result, for example, even if a traveling load from the vehicle is repeatedly received, it is possible to effectively prevent the mortar 12 from being damaged or cracking in the paving block 11 over a long period of time. become.

  Further, in the process in which the mortar 12 is solidified from the state where it has not yet solidified, the thermoplastic material is heated and softened by electromagnetic induction heating of the metal material 14, so that the mortar 12 is spread through the softened and molten thermoplastic material. It becomes possible to improve the adhesive force between the mortar 12 and the paving block 11. This makes it possible to effectively prevent the paving block 11 from being peeled off from the mortar 12 over a long period of time.

  Further, according to the first embodiment, the joint mortar 17 containing the thermoplastic material is filled in the step of filling the joint mortar 17 into the joint 16 between the plurality of paving blocks 11 arranged. Yes. Therefore, according to the first embodiment, since the joint material mortar 17 includes the thermoplastic material, in addition to the improved elasticity, the mat mortar 12 is solidified from a state where it has not yet solidified. In the course of the process, the thermoplastic material is heated and softened and melted by electromagnetic induction heating of the metal material 14, so that the thermoplastic material is more closely integrated with the fine aggregates in the joint mortar 17, etc. It becomes possible to improve the elasticity in a more stable state. As a result, for example, even when a traveling load from the vehicle is repeatedly received, it is possible to effectively prevent the joint mortar 17 from peeling off from the joint part 16 over a long period of time.

  FIG. 2 explains a block pavement construction method and a block pavement structure according to a second preferred embodiment of the present invention. In the second embodiment shown in FIG. 2, the same components as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted. To do.

  And in this 2nd Embodiment, the construction method of block pavement is in the construction method which forms block pavement by laying down a plurality of blocks 11 for pavement by interposing floor mortar 12 'between base layers 13, For example, a thermoplastic material that also serves as an adhesive layer 19 and a metal material 14 ′ are laid on the surface of a mortar 12 ′ that is not blended with a thermoplastic material, and the paving blocks 11 are laid on the mortar 12 ′. After that, the method includes a step of heating the metal material 14 ′ by applying electromagnetic induction from above the paving block 11 to soften the thermoplastic material that also serves as the adhesive layer 19.

  As a result, the block pavement structure 10 of the second embodiment includes a floor mortar layer 15 ′ formed by a floor mortar 12 ′ formed on the base layer 13 and not containing a thermoplastic material, and the floor mortar layer 15 ′. A metal material 14 'laid on the surface, a thermoplastic material serving as an adhesive layer 19 laid over the metal material', and a plurality of paving blocks 11 laid on the metal material 14 '. The

  The block pavement construction method of the second embodiment includes a step of filling joints mortar 17 ′ in joints 16 between a plurality of paving blocks 11 arranged in the joint mortar 17 ′. A thermoplastic material is blended.

  Thereby, in the block pavement structure 10 ′ of the second embodiment, the joint mortar 17 ′ containing the thermoplastic material is filled in the joint portions 16 between the plurality of paved blocks 11 arranged. become.

  According to the second embodiment, as the metal material 14 ', a sheet or film made of, for example, iron, stainless steel, copper, aluminum, aluminum alloy, or the like, similar to the metal material 14 of the first embodiment. Various shapes such as a shape, a net shape, and an irregular shape can be used. Further, as the thermoplastic material, the same polyolefin material as the thermoplastic material of the second embodiment, polyolefin such as polyethylene and polyethylene terephthalate, polystyrene, polypropylene, polyvinyl acetate, polyamide, polyamideimide, ethylene-vinyl acetate copolymer (EVA) ), Urethane, SBR, CR and other thermoplastic resins; bitumen materials such as asphalt and tar; and the like.

  In the second embodiment, as the metal material 14, for example, a metal net such as an iron net or stainless steel net of about # 5 mm is used. Further, as the thermoplastic material also serving as the adhesive layer 19, a sheet material having a thickness of preferably about 2 to 10 mm made of a thermoplastic resin such as EVA is used. Further, as the mortar 12 ′ constituting the mortar layer 15 ′, a mortar that does not contain a thermoplastic material can be used, but a mortar that contains a thermoplastic material can also be used. Furthermore, as the joint mortar 17 ′ containing the thermoplastic material filled in the joint portion 16, a highly elastic mortar using a thermoplastic resin as a binder can be used.

  Also by the block pavement construction method and the block pavement structure 10 ′ of the second embodiment, by moving the electromagnetic induction heating device 18 along the upper surface of the pavement blocks 11 arranged side by side, a metal material is obtained. The first embodiment is configured such that 14 ′ is sequentially heated to sequentially heat and melt the thermoplastic material laid on the surface of the mortar layer 15 ′ and the thermoplastic material contained in the joint mortar 17 ′. The effect similar to that of the block pavement construction method and the block pavement structure 10 is achieved.

  Further, according to the second embodiment, the thermoplastic material laid over the metal material 14 ′ disposed on the mortar layer 15 ′ also serves as the adhesive layer 19. The adhesive force between the '(laying mortar layer 15') and the paving block 11 is further improved, and the paving block 11 is peeled off from the pouring mortar 12 '(laying mortar layer 15') over a long period of time. Can be avoided more effectively. The metal material 14 ′ made of a metal net such as an iron net or a stainless net disposed on the mortar layer 15 ′ can also exert a reinforcing function for improving the overall bending strength of the block pavement.

The present invention is not limited to the above embodiments. For example, the block pavement construction method of the present invention can be applied not only to a roadway but also to a sidewalk, a promenade, a plaza, a building periphery, a rooftop, and the like.

10, 10 'Block pavement structure 11 Pavement block 12, 12' Laying mortar 13 Base layer 14, 14 'Metal material 15, 15' Laying mortar layer 16 Joint portion 17, 17 'Joint mortar 18 Electromagnetic induction heating device 19 Adhesive layer ( Thermoplastic material)
20 Roadbed layer

Claims (3)

In the construction method of block pavement formed by laying a plurality of paving blocks with a mortar interposed between them and the base layer,
In the floor mortar or on the surface of the floor mortar, a thermoplastic material and a metal material are blended or laid,
After laying the paving block on the mortar, heating the metal material by applying electromagnetic induction from above the paving block, and softening the thermoplastic material ;
A step of filling joint mortar into joints between the plurality of paving blocks arranged side by side, wherein a thermoplastic material is blended in the joint mortar,
A block pavement construction method in which a blending ratio of the thermoplastic material blended in the joint mortar is larger than a blending ratio of the thermoplastic material blended in the mat mortar .   The block pavement construction method according to claim 1, wherein the thermoplastic material is a thermoplastic resin.   The block pavement construction method according to claim 1, wherein the metal material is a metal net.

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