JP2909929B2 - How to build a block pavement - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for constructing a block pavement. More specifically, the present invention can be applied to a sidewalk, a community road, a shopping mall or a bicycle path, a park, a plaza, a parking lot, and a general road to provide an aesthetically pleasing block pavement with excellent durability. The present invention relates to a method for constructing a block pavement.

BACKGROUND ART Block pavement has been practiced for a long time, but block pavement has only recently begun to be fully implemented on general roadways.

The block pavement construction method that has been generally practiced in the past is to spread cushioning sand on the basement of the lower ground, the roadbed, and the road, etc., and arrange the pavement block on top of it to roll the surface. In this method, the joint space formed between the paving blocks arranged is filled with joint sand and finished by rolling with a compactor or the like. However, building a block pavement on a roadway by this method has the following problems. That is, in the block pavement constructed by this method, since the sand used is not sticky, the joint sand flows out or scatters due to rainwater or wind. As a result, the impact of traffic vehicles
There has been a major problem that vibrations and the like are increased and the cushion sand is moved, leading to early destruction of the block pavement.

Therefore, in order to address these problems, a method has been proposed and implemented in which an empty kneaded cement mortar in which cement and sand are mixed is used instead of conventional cushion sand and joint sand. In this method, an empty kneading cement mortar is laid, a pavement block is disposed thereon, and rolling is performed.Filling the empty kneading cement mortar in a joint space portion, water is sprinkled, and further, empty kneading with rainwater is performed. A hydration reaction occurs in the cement in the cement mortar, and the cushion sand and joint sand composed of the empty kneaded cement mortar are solidified and fixed in a mortar shape, and the paving block is fixed to the roadbed to block the pavement. Is how to build.

However, although this method was effective to some extent for light traffic, the solidified solid cement cement mortar was inherently brittle, so early joints were required for heavy traffic such as large vehicles on general roadways. However, there is a problem that cracks occur and become ragged, and as a result, there is no difference from the one using the cushion sand, which results in damage to the block pavement.

In addition, as a method of fixing cushion sand and joint sand when constructing a block pavement, a method of fixing cushion sand and joint sand by spraying a water-soluble prepolymer, or a method of cushioning a mixture of hydraulic slag and a water-soluble polymer is used. There have been proposals to use sand and joint sand instead.However, any of these methods may cause cracks in heavy traffic, causing joint sand to flow out due to rainwater. It has not been possible to solve the problem of block pavement damage due to heavy traffic.

An object of the present invention is to solve these conventional problems, and can be carried out not only on a sidewalk, a landscape pavement such as a plaza, but also on a general road having heavy traffic such as a large car, and with an aesthetic appearance. It is an object of the present invention to provide a method for constructing a block pavement capable of obtaining a block pavement having excellent durability.

DISCLOSURE OF THE INVENTION The present invention proposes a method of using a cement asphalt mortar (hereinafter simply referred to as “CA mortar”) as a means for fixing a pavement block when constructing a block pavement.

That is, according to the present invention, a tack coat layer is provided by spraying a bituminous emulsion on a base such as a road, and then an aggregate is laid on the upper surface to form an aggregate layer. After arranging the blocks with their top heights aligned, the joint space formed between the blocks
Using a mortar for injection, a funnel for injection, a funnel for injection, or a tremy tube, etc., the buffer support layer is formed by filling the gap between the aggregate layers by uniformly injecting and filling the gap between the aggregate layers. It also provides a method for building a block pavement that has excellent durability with aesthetic appearance, by filling the joint with filler material other than CA mortar or CA mortar to form joints and integrally fixing the block on the base. is there.

CA used in the method for constructing block pavement in the present invention
Since mortar has adhesiveness and viscoelasticity unlike general cement mortar, the buffer support layer formed by filling the gaps of the aggregate layer, which is the support layer of the block, with CA mortar is an adhesive layer. As well as having an excellent function, the base and the block are firmly fixed via the tack coat layer, and the joint is filled with joints consisting of CA mortar or injected joint material other than CA mortar Since they are effectively fixed to each other, it is possible to provide a block pavement which can sufficiently withstand even a general roadway.

Further, since the CA mortar used in the method of constructing a block pavement according to the present invention has viscoelasticity different from general cement mortar, the cushioning support layer as an adhesive layer is capable of preventing impact, vibration, and the like due to vehicle traffic. It also has an excellent function as a cushion layer that effectively absorbs and relaxes, and joints made of CA mortar or injected joint material other than CA mortar filled in joint space part can prevent the behavior of individual blocks due to vehicle traffic etc. As a result, it is possible to provide a block pavement with excellent durability even for heavy traffic.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1, FIG. 2, and FIG. 3 are longitudinal sectional side views showing an outline of an implementation state of a method for constructing a block pavement according to the present invention. FIG. 1 is a longitudinal sectional side view showing a state in which an aggregate is laid to form an aggregate layer and a paving block is temporarily placed. FIG. 2 shows the gap between the aggregate layer and the joint space.
FIG. 4 is a vertical sectional side view showing an injection state of CA mortar;
The figure is a longitudinal side view showing the completed state of the block pavement.

FIG. 4 shows an example in which a narrow groove is provided on the bottom surface of the pavement block, FIG. 5 shows an example in which a fine groove is provided in the upper part of the aggregate layer, and FIG. An example in which a hollow perforated pipe is embedded in a narrow groove is shown. FIG. 7 shows an example in which a filling material is temporarily provided, and FIG. 8 is a longitudinal sectional side view showing a state in which CA mortar is injected into a joint space divided by the filling material.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method for constructing a block pavement of the present invention will be described in detail.

The base in the present invention is, for example, existing bituminous pavement,
Concrete pavement and roadbed. Further, it includes earth-based pavement on sidewalks, parks, plazas, and the like, bridge pavement, and concrete slabs and steel slabs.

The bituminous emulsion used in the present invention is an asphalt emulsion and a modified asphalt emulsion.

Asphalt emulsions are those obtained by emulsifying and dispersing asphalt in water with an emulsifier, dispersant, stabilizer, etc., depending on the type of emulsifier used for emulsification, cationic asphalt emulsion, anionic asphalt emulsion, nonionic asphalt emulsion, clay type emulsion. And so on. In the present invention, a cationic asphalt emulsion is used as the asphalt emulsion used as the tack coat layer on the substrate. As the cationic asphalt emulsion, for example, JI
PK1 to PK4 in the standard of S K2208 petroleum asphalt emulsion are exemplified. As the asphalt emulsion used for the CA mortar, a nonionic asphalt emulsion is mainly used. As the standard of nonionic asphalt emulsion, the numerical value is specified in JIS K 2208 petroleum asphalt emulsion MN-1.

Modified asphalt emulsion is made of natural rubber,
Emulsified and dispersed in water using an emulsifier, a dispersant, a stabilizer, or the like, asphalt modified by mixing a polymer or the like, or natural rubber, a latex of a polymer, or the asphalt emulsion, or , Emulsion and the like. As typical modified asphalt emulsions, there are PKR-T and PKR-S in the standard of rubber-containing asphalt emulsion by the Japan Asphalt Emulsion Association.

The aggregate used in the present invention is an aggregate described in "Asphalt Pavement Guidelines" issued by the Japan Road Association, and includes crushed stone, crushed stone, gravel, steel slag, and the like. Further, asphalt-coated aggregates obtained by coating these aggregates with asphalt, recycled aggregates, and the like can also be used. In addition, artificially fired aggregates, fired foamed aggregates, artificial lightweight aggregates, ceramic particles, emery, and the like can also be used as similar granular materials. Further, the aggregate may have a continuous particle size or a single particle size. Generally, the particle size range is 5-13mm
No. 6 crushed stone or crushed stone is used.

The pavement block used in the present invention is a natural stone, a pavement concrete, a flat plate, a brick, an interlocking block, an elastic block, a tile, and the like. It is preferable that these paving blocks are provided with a narrow groove on the bottom surface.

Natural stones are mainly marble, granite, andesite,
Stone materials such as granite are used. As the shape of the stone,
Cube split stone, shaped stone, irregular stone, and the like are used.

As a concrete plate for paving, mainly JIS A530
As the concrete plate for pavement specified in 4, a normal plate, a color plate, a washing plate, a pseudo-stone plate, and the like are used, but a transparent horizontal plate, a tiled plate, a painted plate, and the like can also be used.

The bricks include ordinary bricks, interlocking block bricks, etc.
The one that conforms to 1250 is used.

As the interlocking block, a block that conforms to the quality standard of the interlocking block described in “Interlocking Block Pavement” published in 1994 by the Interlocking Block Association is used.

As the elastic block, one obtained by adding a liquid urethane resin or the like as a binder to a granular rubber obtained by pulverizing a waste tire or the like and subjecting it to heat compression molding is used.

As the tile, tiles of porcelain, porcelain, pottery, etc. specified in JIS A5209 are mainly used. Elastic tiles with viscoelastic properties added to the tiles can also be used.

The CA mortar used in the present invention means 50 to 230 parts by weight of an asphalt emulsion, 0 to 100 parts by weight of a rapid-hardening admixture, 60 to 330 parts by weight of a fine aggregate, and 0 to 5 parts of a setting modifier based on 100 parts by weight of cement. It is a CA mortar comprising parts by weight, 0 to 0.05 parts by weight of aluminum powder, 0 to 40 parts by weight of an expandable admixture, 1 to 5 parts by weight of an additive and a required amount of added water.

As cement used for CA mortar, for example, ordinary Portland cement, early strength Portland cement,
Ultra-high strength Portland cement, moderate heat Portland cement, blast furnace cement, silica cement, fly ash cement, sulfate resistant cement, jet cement and the like.

The asphalt emulsion used for the CA mortar may or may not contain a polymer,
Asphalt emulsions containing polymers are preferred.

The polymer-containing asphalt emulsion is a nonionic asphalt emulsion obtained by mixing the asphalt emulsion and the resin emulsion in a weight ratio of 99 to 75: 1 to 25, preferably 95 to 75: 5 to 25. The asphalt emulsion used for the polymer-containing asphalt emulsion is a nonionic asphalt emulsion, which is prepared by emulsifying and dispersing asphalt in water using a nonionic emulsifier, a dispersant, a stabilizer and the like. The nonionic asphalt emulsion usually has a solid content in the range of 40 to 70% by weight.
When the solid content is less than 40% by weight, viscoelasticity cannot be imparted to the CA mortar, whereas when the solid content exceeds 70% by weight, the viscosity increases and the viscosity is good. CA mortar cannot be obtained. As the asphalt in the nonionic asphalt emulsion, it is preferable to use one having a penetration (25 ° C.) of about 40 to 300 in consideration of the properties after decomposition and hardening.

Examples of the resin emulsion used for the asphalt emulsion containing a polymer include an SBR emulsion, an acrylic emulsion, and an EVA emulsion. In the present invention, an SBR emulsion is mainly used. The SBR emulsion is weakly alkaline and has a good mixability with the cement and the nonionic asphalt emulsion. The solid content of the SBR emulsion is usually 50% by weight.

A polymer-containing asphalt emulsion can be usually prepared by uniformly mixing and dispersing a resin emulsion in a nonionic asphalt emulsion by high-speed stirring.

The ratio of the nonionic asphalt emulsion to the resin emulsion in the polymer-containing asphalt emulsion is usually in a weight ratio of nonionic asphalt emulsion: resin emulsion = (99 to 75) :( 1 to 25), preferably (95 to 95). 75):
(5 to 25). The ratio of resin emulsion is 1
When it is less than 5, the required viscoelasticity cannot be imparted to the CA mortar, and when it is 5 or more, sufficient viscoelasticity can be imparted. On the other hand, when the ratio of the resin emulsion exceeds 25, the polymer-containing asphalt emulsion is thickened and a good CA mortar cannot be obtained. Also, the pumping operation by the pump becomes difficult.

The amount of the asphalt emulsion containing a polymer is usually in the range of 50 to 230 parts by weight based on 100 parts by weight of cement.
If the amount of the polymer-containing asphalt emulsion is less than 50 parts by weight, the viscoelasticity cannot be imparted to the CA mortar, whereas if the amount of the polymer-containing asphalt emulsion exceeds 230 parts by weight, the CA mortar The strength of the CA mortar decreases, and the bearing capacity of the CA mortar packed bed decreases.

The rapid-hardening admixture used in the CA mortar is a mixture obtained by mixing calcium aluminate and anhydrous gypsum at a weight ratio of 1: 1.4 to 2.9. This mixture imparts rapid hardening to the cement and gives the CA mortar an early strength development. If the mixing ratio of anhydrous gypsum is less than 1.4, rapid hardening is weak, and if the mixing ratio of anhydrous gypsum exceeds 2.9, rapid hardening becomes too strong to control the pot life.

The amount of the rapid-hardening admixture is usually in the range of 0 to 100 parts by weight, preferably 0 or 40 to 70 parts by weight, based on 100 parts by weight of cement. If the amount of the rapid-hardening admixture exceeds 100 parts by weight, the rapid-hardening property becomes too strong, and the work becomes difficult.

The fine aggregate used for the CA mortar is river sand, hill sand, mountain sand, screenings, silica sand and the like. Usually, the particle size preferably has an FM value (coarse particle ratio) in the range of 1.0 to 1.6. If the FM value is less than 1.0, the CA mortar thickens,
On the other hand, when the FM value exceeds 1.6, material separation is likely to occur.

In place of the fine aggregate, a powdered material of a mineral such as fly ash or silica powder may be used.

The amount of the fine aggregate is usually in the range of 60 to 330 parts by weight based on 100 parts by weight of cement. Use 60 fine aggregate
When the amount is less than part by weight, the volumetric shrinkage of the cured CA mortar is liable to occur. On the other hand, when the amount of the fine aggregate exceeds 330 parts by weight, material separation occurs and the work becomes difficult.

The setting modifier used in the CA mortar is a polycarboxylic acid or the like, for example, a jet setter, etc.
It is useful for adjusting the pot life of mortar. The amount of the setting modifier used is usually in the range of 0 to 5 parts by weight based on 100 parts by weight of cement. If the use amount of the setting regulator exceeds 5 parts by weight, the pot life is sufficient but early development of strength cannot be expected.

The aluminum powder used in the CA mortar is used in the range of 0 to 0.05 parts by weight for adjusting the expansion coefficient. Consumption
If it exceeds 0.05 parts by weight, the CA mortar may be expanded and destroyed, which is not preferable.

Lime and CSA are used as expandable admixtures for CA mortar.
There is a system. The expansive admixture not only has the effect of preventing cracking due to volume shrinkage of the CA mortar injected and filled into the voids of the aggregates and joints, but also prevents the material separation of the CA mortar and provides dispersibility and water tightness. It is also useful. The amount of the expandable admixture used is usually 0 to 40 parts by weight, preferably 0 or 10 to 15 parts by weight, based on 100 parts by weight of cement. If the amount of the expandable admixture exceeds 40 parts by weight, the CA mortar may undesirably expand and break.

Additives used in CA mortar include fluidizers and air entrainers. The superplasticizer is for improving the workability of the CA mortar, and the air entrainer is effective for improving the frost resistance of the CA mortar. The amount of additives used is usually 10
It is in the range of 1 to 5 parts by weight with respect to 0 parts by weight. If the fluidizing agent is less than 1 part by weight, there is no effect, and if it exceeds 5 parts by weight, material separation and curing failure of the CA mortar are caused, which is not preferable. When the amount of the air entraining agent is less than 1 part by weight, there is no effect. On the contrary, when the amount is more than 5 parts by weight, the curing of the CA mortar is remarkably inhibited. The fluidizing agent and the air entraining agent may be used alone or in combination.

As the added water used for the CA mortar, fresh water is usually used. For example, tap water, industrial water, groundwater, river water, and the like.

The CA mortar used in the present invention can be produced by the following preparation method. That is, first, a required amount of asphalt emulsion is charged into a predetermined container, and each required amount of added water, a setting modifier, an additive, etc. is added while stirring with a hand mixer to prepare a mixed solution. Next, the required amounts of cement, rapid-hardening admixture, fine aggregate, and aluminum powder are added to the mixture, and the mixture is kneaded with high-speed stirring, whereby the CA mortar of the present invention can be prepared. In addition, in order to increase the work efficiency, in advance, a hardened admixture in cement,
A mixture in which fine aggregate and aluminum powder are mixed in required amounts, or an asphalt emulsion in which additives and the like are mixed in advance in an asphalt emulsion may be used. The prepared CA mortar is immediately subjected to an injection operation.

As the joint sand used in the present invention, the fine aggregate used in the above-mentioned CA mortar is used.

As the injected joint material other than the CA mortar used as the filler in the joint space, a heated injection joint material or a room temperature injection joint material is used. The heating type joint material is selected from joint products made of elastomer asphalt, elastomer resin or the like. In addition, the cold-filled joint material is selected from joint products made of polysulfide, urethane resin, epoxy resin, acrylic resin, silicone resin and the like.

Next, the state of implementation of the block pavement construction method according to the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a base made of, for example, existing asphalt pavement, and reference numeral 2 denotes a tack coat layer provided on the base 1 by spraying a bituminous emulsion. The tack coat layer may not be provided depending on the situation at the site, but it is preferable to provide a tack coat layer in order to enhance the adhesion between the base layer and the aggregate layer. 3 is based on aggregate 1
It is an aggregate layer formed by laying on it. Reference numeral 4 denotes a paving block, which is placed on the aggregate layer 3 in a temporarily placed state. These paving blocks 4, 4 ...
A joint space 5 is formed in a portion where they are adjacent to each other. Reference numeral 6 denotes side surfaces of the pavement blocks 4, 4,... Opposed to each other in the joint space 5, and the surfaces of the side surfaces 6, 6,.
The asphalt coating treatment with a bituminous emulsion in advance on the bottom surface of ... is effective in increasing the adhesion between the paving block 4 and the buffer support layer 9 described later.

In FIG. 2, reference numeral 7 denotes a CA mortar, which is injected along the joint space 5 by, for example, an injection jar 8 or the like. The injected CA mortar 7 is filled in the gaps of the aggregate layer 3 and solidifies by combining the respective aggregates. The cement asphalt concrete in which the CA mortar and the aggregate are mixed and solidified (hereinafter simply referred to as “CA concrete”) ")
Form a layer. Since this CA concrete layer is formed of CA mortar and an aggregate having adhesiveness and viscoelasticity, not only does the base 1 and the pavement block 4 be firmly fixed, but also the pavement block 4 , 4... Function elastically as a buffer support layer 9 for effectively absorbing and mitigating impacts and vibrations due to vehicle traffic. Further, the CA mortar 7 filled in the joint space 5 forms an elastic joint material 10, and connects the paving blocks 4, 4,... To each other. Although the entire joint space 5 may be filled with the elastic joint material 10, as shown in FIGS. 2 and 3, the joint sand 11 is partially left over the joint space 5. May be filled.

Also, after filling the aggregate layer with CA mortar, the filler to the joint space 5 may be filled with a heated joint filler or a normal temperature joint filler other than CA mortar. When the joint space other than the mortar is filled in the joint space 5, the water shielding of the joint after service and the followability of the joint to expansion and contraction can be further improved.

Further, a narrow groove 12 may be provided on the bottom surface of the paving block 4 as shown in FIG. When the narrow grooves 12 are provided on the bottom surface of the paving block 4 as described above, the air in the aggregate layer 3 passes through the narrow grooves 12 when the CA mortar is injected, as shown by arrows in FIG. Since it is quickly discharged to the outside, the filling rate of the CA mortar can be increased. Further, since the CA mortar itself can flow through the narrow groove 12, there is an effect that the CA mortar can be quickly filled into the aggregate layer 3 covered with the paving block 4.
In addition, the CA mortar injected and filled into the narrow groove 12 and hardened has a function of a stopper of the pavement block 4 with respect to the buffer support layer 9, so that the pavement block 4 keeps the vehicle even when a traffic vehicle passes. Has the effect of preventing it from moving back and forth, left and right due to vibrations and shocks of the vehicle.

FIG. 4 shows a case where two narrow grooves 12 are provided in one pavement block 4 in parallel in one direction. However, the direction and the number of the narrow grooves 12 are not limited thereto. , Fourth
Two more fine grooves may be provided in a direction orthogonal to the two fine grooves 12 shown in the figure, or they may cross obliquely. Needless to say, three or more per pavement block may be used, and conversely, one may be used. When the number of pavement blocks is reduced, it is advantageous to increase the width and depth per one.

Instead of providing a narrow groove on the bottom surface of the paving block 4, it is also possible to provide a narrow groove 13 on the upper surface of the aggregate layer 3, as shown in FIG. 5, for example. The narrow groove 13 may be formed by any method. For example, the narrow groove 13 can be formed by scraping off the aggregate on the upper surface of the aggregate layer 3 and removing a part of the aggregate. Can be formed also by making a groove-like depression on the upper surface of the aggregate layer 3 by pressing the groove. CA
The discharge of air in the aggregate layer 3 due to the filling of the mortar is the fifth.
As shown by the arrow in the figure, this is quickly performed through the narrow groove 13 provided on the upper surface of the aggregate layer 3. In addition, this narrow groove 13
The mortar itself can also flow through it, so it can quickly reach the inside of the aggregate layer 3 covered with the paving block 4.
CA mortar can be filled.

FIG. 5 shows an example in which two narrow grooves 13 are provided in parallel for each pavement block, but the number and direction of the narrow grooves 13 are not limited to this. It may be provided diagonally to the pavement block or may intersect each other.

Further, a hollow perforated pipe 14 can be embedded in the narrow groove 13 provided in the aggregate layer 3, as shown in FIG. As the hollow perforated tube 14, a hollow perforated tube made of metal such as steel or plastic such as vinyl chloride can be used.
Also, the pipe to be buried is not limited to the one shown in the figure,
A tube in which a metal wire such as steel or a plastic wire such as vinyl chloride is wound in a coil spring shape, or a hollow mesh tube made of metal such as steel or plastic such as vinyl chloride may be used. These hollow perforated pipes, coil spring-shaped pipes, and hollow mesh pipes can be appropriately combined and used together.

In FIG. 6, with the filling of the CA mortar, air in the aggregate layer 3 enters the inside of the hollow perforated tube 14 from the hole 15 of the hollow perforated tube 14 and passes through the inside of the hollow perforated tube 14. Immediately discharged outside.

In the above description, the case where a narrow groove is provided on a pavement block, the case where a fine groove is provided above an aggregate layer, and the case where a hollow perforated pipe is buried in the fine groove above the aggregate layer are respectively different. However, it goes without saying that these three means may be used in combination as appropriate.

At the time of CA mortar injection, as shown in FIG.
Joint space 5 formed between paving blocks 4, 4,...
It is preferable to temporarily install the filling members 16, 16,... At appropriate plane positions. The filling members 16, 16,... Are, for example, round bar-shaped members made of styrene foam or the like, and the lower end thereof is in contact with the upper surface of the aggregate layer 3 and is substantially vertically erected. It is a plug. Multiple fillings 1
The joint space portion 5 is divided into a plurality of planar regions by 6, 16,.... In FIG. 7, the three paving blocks are temporarily provided at intersections where the three paving blocks are in contact with each other. However, the provisional position is not limited to this, and may be any position in the joint space formed by the adjacent paving blocks.

FIG. 8 shows a case in which CA mortar is injected into the joint space 5 surrounded by the filling materials 16, 16,....
As is clear from the figure, the injected CA mortar is blocked by the filling materials 16, 16,... Closing the joint space 5, and does not spread to the surface of the aggregate layer in a wider area than necessary. . In the CA mortar staying in a certain area, an osmotic pressure into the aggregate layer 3 is generated by its own weight, and the CA mortar quickly penetrates into the aggregate layer 3 as shown by an arrow in FIG. CA
The mortar filling workability is improved, and the filling rate is also improved.

After the CA mortar has sufficiently penetrated and filled in the aggregate layer 3,
The fillings 16, 16 …… were removed, and then the joint space 5
CA mortar or joint filling material other than CA mortar is filled.

Examples will be shown below, and the features of the present invention will be described in more detail.

(Example 1) As a large car, a route bus passes at about 80 vehicles / day. The method for constructing a block pavement according to the present invention was implemented on an existing asphalt pavement where the traffic type is A traffic.

The tack coat layer in this embodiment is an adhesive layer between the existing asphalt pavement serving as a base and the pavement block.
It is provided to make the buffer support layer filled with CA mortar more firmly adhere to the base. The bituminous emulsion used for this tack coat is a cationic rubber-containing asphalt emulsion, and is manufactured by Nichireki Co., Ltd., with cation GM (evaporation residue 55.0% by weight, evaporation residue penetration (25 ° C.) 93 )It was used.

The aggregate layer in this embodiment is initially formed by laying No. 6 crushed stone on a base having a tack coat layer for paving block installation to an average thickness of about 3 cm. After the installation of the pavement block, after filling and solidifying the CA mortar into the gaps between the aggregates, it functions as an adhesive layer between the base and the pavement block, and after the It functions as a buffer support layer that effectively absorbs and moderates shocks and vibrations. In addition, the buffer support layer also has a role as an uneven leveling layer when the substrate has irregularities.

As a paving block, a natural stone block was used because the site is adjacent to the park and it is necessary to harmonize with the landscape. As this natural stone block, a granite shaped stone material of China (dimensions: length 30 cm, width 30 cm, thickness 12 cm) was used.

Asphalt coating was applied to the side and bottom portions of the natural stone block in advance to improve the adhesion between the aggregate and the buffer support layer formed of CA mortar and the elastic joint formed of CA mortar. As the bituminous emulsion used for the asphalt coating of the natural stone block, the same material as that used for the tack coat was used.

For CA mortar, 200 parts by weight of polymer-containing asphalt emulsion, 100 parts by weight of cement, 5
A CA mortar comprising 6 parts by weight, 166 parts by weight of fine aggregate, 0.7 parts by weight of a setting modifier, 0.03 parts by weight of aluminum powder, 1.0 part by weight of an air entraining agent as an additive, and 30 parts by weight of added water was used.

As the cement, ordinary Portland cement manufactured by Chichibu Onoda Cement Co., Ltd. is used. As the polymer-containing asphalt emulsion, Nichireki PMS emulsion manufactured by Nichireki Co., Ltd. (nonionic asphalt emulsion: resin emulsion = 8)
7.5: 12.5, evaporation residue 60.2% by weight, penetration (25 ° C) 87)
As a rapid-hardening admixture, APS manufactured by Onoda Co., Ltd., in which anhydrous gypsum was mixed in a ratio of 2.0 to 1.0 by weight of calcium aluminate, and silica sand No. 6 (Yamagata product) was used as a fine aggregate. Silica sand: FM value 1.47)
AP setter manufactured by Chichibu Onoda Cement Co., Ltd., and aluminum powder C-250 manufactured by Nakajima Metal Foil & Powder Co., Ltd.
As an additive, an air entrainer Vinsol manufactured by Yamamune Chemical Co., Ltd. was used, and as an additive water, tap water was used.

In this example, silica sand was used as the joint sand.

Hereinafter, the implementation status in this embodiment will be described in more detail.

First, cations on the surface of existing asphalt pavement
GM was sprayed at a rate of 0.4 l / m 2 to form a tack coat layer. Then, after crushing No. 6 crushed stone to an average thickness of about 3 cm thereon, it was lightly rolled with an iron roller to form an aggregate layer. Subsequently, at predetermined positions on the aggregate layer, the bottom and side surfaces of the natural stone block were previously coated with cation GM at a rate of approximately 0.5 liter / sq.m. After arranging them and temporarily placing them, the upper surface was lightly rolled with a vibro plate, and the height position of the upper surface of the granite was adjusted to be uniform to complete the laying of the granite.

Next, prior to the injection operation of the CA mortar, preparation of the CA mortar was started.

The preparation of the CA mortar was performed using a 100-liter plastic container and a hand mixer. For the first preparation of CA mortar, first add the required amount of PMS emulsion and added water to a poly container and slowly add the required amount of the coagulation regulator AP setter while slowly stirring with a hand mixer. After preparing, and subsequently adding each required amount of ordinary cement, rapid-hardening admixture, silica sand No. 6, aluminum powder and air entraining agent to the mixture, the stirring speed of the mixer is set to 1000 times / minute for 3 minutes. Preparation was performed by kneading and mixing. The prepared CA mortar was immediately used for injection work,
Preparation of the mortar for the second and subsequent times was performed according to the progress of the pouring operation.

As a result of the test, the physical properties of the CA mortar and the CA concrete obtained by mixing the CA mortar and the aggregate and solidifying were as follows.
As shown in the table.

For the injection work, the previously prepared CA mortar was immediately subdivided into an injection jar having an outlet matching the joint width of the joint space, and the tip of the injection outlet of the injection jar was inserted into the joint space. Fill the gap between the aggregate layers with CA mortar to form a buffer support layer, and fill a part of the joint space with the elastic joint material by slowly pouring it along the joint space. Was formed. The filling workability of the CA mortar was good. Finally, the remaining portion above the joint space was filled with silica sand to finish the work of the method of the present invention.

Since the CA mortar used was a quick-hardening type, it was possible to open the traffic early after construction.

The natural stone block in the block pavement constructed in this way is firmly fixed on the base by the cushioning support layer and the elastic joints. It is not in a good condition because the original form of construction was maintained as it was.

(Example 2) A block pavement was directly constructed on a pavement roadbed.

Except that the CA mortar used was different, all of the materials used and the construction procedure were carried out in the same manner as in Example 1.

The CA mortar used in this example was based on 100 parts by weight of cement, 130 parts by weight of a polymer-containing asphalt emulsion, 150 parts by weight of fine aggregate, 0.02 parts by weight of aluminum powder, 2 parts by weight of an air entraining agent as an additive, and CA mortar consisting of 35 parts by weight of added water. And as cement,
Chichibu Onoda Cement Co., Ltd.'s fast-strength Portland cement was used as a polymer-containing asphalt emulsion; Nichireki Co., Ltd.'s Nichireki PMT emulsion (nonionic asphalt emulsion: resin emulsion = 90: 10, evaporation residue: 60.8% by weight, Penetration (25 ° C) 83), fine aggregate is silica sand 6
No. (Yamagata silica sand: FM value 1.47), as aluminum powder,
C-300 manufactured by Nakajima Metal Foil & Powder Co., Ltd., Vinsol manufactured by Yamamune Chemical Co., Ltd. was used as an air entraining agent, and tap water was used as added water.

Preparation of the CA mortar was performed on site using a 70 liter plastic container and a hand mixer. First, PMT emulsion and added water are put into a poly container, silica sand No. 6, aluminum powder and air entrainer are added while slowly stirring with a hand mixer, and then high strength Portland cement is added. The mixture was kneaded for 4 minutes at a stirring speed of 1000 times / minute and adjusted by mixing.

Mix this CA mortar and this CA mortar with aggregate,
As a result of the test, the physical properties of the solidified CA
As shown in the table.

The natural stone block in the block pavement constructed using this CA mortar is firmly fixed on the roadbed by the cushioning support layer and the elastic joint, as in Example 1.
It has sufficient durability for heavy traffic on general roadways.

(Example 3) As in Example 2, a block pavement was directly constructed on a pavement roadbed.

However, as a paving block, a concrete paving plate is used, and on the bottom surface, the air in the aggregate layer accompanying the CA mortar filling is rapidly reduced so that the CA mortar can be quickly filled into the aggregate layer. For the purpose of degassing
A narrow groove was formed. The formed narrow groove is as shown in FIG. 4 and has a width of 1 cm and a depth of 1 cm.
Two narrow grooves were formed per piece.

After the paving blocks were placed, prior to filling with the CA mortar, a filling material was temporarily provided in the joint space between the paving blocks. As the filling material, use styrofoam with a diameter of about 13 mm formed in a round bar shape, and at an appropriate position in the joint space extending in a plane, with an appropriate interval, the lower end of the filling material is almost vertically It was inserted so as to be in contact with the upper surface of the material layer. The filler material divided the joint space into areas of approximately one square meter on the pavement surface.

CA mortar was injected into the divided joint space to fill the aggregate layer. After confirming that the filling of the aggregate layer was completed, the filling material was removed, and subsequently, CA mortar was also injected into the joint space and filled to complete the block pavement.

The CA mortar used in this example was 100 parts by weight of cement, 150 parts by weight of a polymer-containing asphalt emulsion, 120 parts by weight of fine aggregate, 18 parts by weight of an expandable admixture, 0.01 part by weight of aluminum powder, and as an additive. CA mortar consisting of 1 part by weight of air entrainer and 50 parts by weight of added water.

As the cement, fast-strength Portland cement manufactured by Chichibu Onoda Cement Co., Ltd., and as the polymer-containing emulsion, Nichireki PMT emulsion (Nonionic asphalt emulsion: resin emulsion = 90:10, evaporation residue 61.0) %, Penetration 93 (25 ° C), as fine aggregate,
Silica No.6, lime-based Onoda AP manufactured by Onoda Co., Ltd. as an inflatable admixture, C-300 manufactured by Nakajima Metal Foil Powder Co., Ltd. as aluminum powder, and additives as an additive Air entrainer Vinsol manufactured by Yamamune Chemical Co., Ltd. was used, and tap water was used as added water.

The production of CA mortar was performed on site using a grout mixer with a capacity of 120 liters. First, add Nichireki PMT emulsion and added water, and add silica sand No. 6, aluminum powder, and additives while stirring at low speed (300 rpm).
Subsequently, after adding the expansive admixture and the early-strength Portland cement, the rotation speed of the mixer was increased to 500 rpm (500 r.p.
m.) and kneaded and mixed for 3 minutes.

Mix this CA mortar and this CA mortar with aggregate,
The physical properties of the solidified CA concrete were 3rd as a result of the test.
As shown in the table.

Except for the above, a block pavement was constructed directly on the pavement base in the same construction procedure as in Example 2.

The block pavement constructed in this way is described in Example 1.
Similarly to the above, the cushioning support layer and the elastic joint are firmly fixed on the roadbed, and not only have sufficient durability against heavy traffic on general roads, but also the used pavement block. By providing a narrow groove on the bottom,
Example 2 The temporary installation of the filling material in the joint space portion resulted in Example 2
The injection and filling of the CA mortar could be performed promptly, and the penetration of the CA mortar into the aggregate layer was extremely uniform and sufficient.

Further, by adding the expandable admixture to the CA mortar, the expansion rate of the CA mortar was +2.1 (%), and the expansion rate of the CA mortar of Example 2 in which the expandable admixture was not added was +1.
Compared with 2 (%), a result with less volume shrinkage was obtained.

(Example 4) As a paving block, a concrete paving plate having a length of 60 cm, a width of 40 cm, and a thickness of 5 cm was used. Instead of providing a narrow groove on the bottom surface of the paving concrete plate, a φ2c was placed on the top of the aggregate layer.
A block pavement was constructed using the same materials and the same construction procedure as in Example 3, except that semicircular narrow grooves of about m were provided at intervals of 20 cm parallel to the longitudinal direction of the road.

The injection and filling work of the CA mortar could be performed quickly, and the penetration of the CA mortar into the aggregate layer was extremely uniform and sufficient. The constructed block pavement was firmly fixed on the roadbed by its cushioning support layer and elastic joints as in Example 1, and had sufficient durability against heavy traffic on a general roadway. .

(Example 5) The same material and the same as Example 4, except that a hollow perforated pipe made of vinyl chloride of φ2 cm was buried in a narrow groove provided above the aggregate layer at intervals of 20 cm in parallel with the longitudinal direction of the road. In the construction procedure, block pavement was constructed.

The injection and filling work of the CA mortar could be performed quickly, and the penetration of the CA mortar into the aggregate layer was extremely uniform and sufficient. The constructed block pavement was firmly fixed on the roadbed by its cushioning support layer and elastic joints as in Example 1, and had sufficient durability against heavy traffic on a general roadway. .

(Example 6) After filling the aggregate layer with CA mortar, as a filler for the joint space between the pavement blocks, a polysulfide-based room-temperature joint filler (Nichireki Co., Ltd., NeoTail Seal Cold) In addition, when filling the aggregate layer with the CA mortar, no filling material was hypothesized in the joint space portion, and otherwise the block pavement was constructed using the same material and the same construction procedure as in Example 3.

The constructed block pavement is firmly fixed on the roadbed by the buffer support layer and the high expansion and contraction injection joint,
It had higher durability against heavy traffic on general roads.

INDUSTRIAL APPLICABILITY The present invention is configured as described above and has the following effects.

1) The present invention is different from the conventional method in that even if the foundation has some irregularities, and even if the paving block is not well-formed, the paving block can be formed by the laying thickness of the aggregate. The height of the upper surface of the pavement can be easily adjusted, and the gap between the aggregates is filled with CA mortar that provides uniform strength, so that the buffer support layer that bonds the pavement block and the base can be easily formed. Because it can be done, it has a practical benefit with excellent workability.

2) According to the present invention, since the CA mortar filled in the aggregate layer exhibits an adhesive property, the paving block can be installed only temporarily, so that the installation work is quick and no special mason is required. It has good profitability with excellent workability.

3) Use of quick-hardening CA mortar has the benefit of opening up traffic early after construction.

4) Since the present invention uses CA mortar which has strong adhesiveness and elasticity, the buffer support layer filled with CA mortar firmly fixes the pavement block to the base and has elasticity made of CA mortar. The joints can firmly fix the blocks to each other. Therefore, the block pavement constructed using the present invention has the following effects:
Vibration and the like can be effectively absorbed and alleviated, and it is possible to sufficiently cope with stress generated by vehicle traffic and the like, so that it is possible to provide a block pavement having excellent durability even for heavy traffic on general roads. .

5) The CA mortar is formed by forming a narrow groove on the bottom surface of the pavement block or the upper part of the aggregate layer, or by burying a hollow perforated pipe or the like in the narrow groove formed on the upper part of the aggregate layer. At the time of filling, the air in the aggregate layer can be quickly discharged, and the filling workability is further improved.

6) By temporarily arranging a plurality of filling materials at arbitrary plane positions in the joint space formed between the pavement blocks, CA
The mortar filling workability is improved, and the
The filling rate of CA mortar is improved.

7) Filling the aggregate layer with CA mortar, and then using a resilient injected joint material other than CA mortar in the joint space formed between the pavement blocks, thereby blocking the joint after service. The ability to follow the expansion and contraction of the joint and the water-based joint can be further enhanced.

Since the construction of the block pavement of the present invention has excellent effects as described above, it can be used for pavement of general roadways to provide a block pavement having excellent appearance and excellent durability.

Needless to say, the present invention exerts excellent durability even when applied to various types of block pavement on conventional sidewalks, open spaces, and the like.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Katsutoshi Sato 2-7-8 Satsuki, Utsunomiya City, Tochigi Prefecture (72) Inventor Takuro Kurokawa 1-2-8 Higashi Kusatsu, Kusatsu City, Shiga Prefecture Pastel Heights 103 (56) Reference Document JP-A-7-286301 (JP, A) JP-A-56-12402 (JP, A) JP-A-56-77503 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E01C 5/00

Claims (11)

(57) [Claims] 1. A tack coat layer is provided on a base such as a road by spraying a bituminous emulsion as needed, and then an aggregate is laid on the upper surface thereof to form an aggregate layer. After arranging a large number of paving blocks on the upper surface thereof at the same height, the cement asphalt mortar is uniformly injected from the joint space formed between the paving blocks to form the bone. The buffer support layer is formed by filling the gaps between the material layers, and the joint space is uniformly filled with cement asphalt mortar or injected joint material other than cement asphalt mortar, and the pavement block is integrally formed on the base. A method for constructing a block pavement, characterized in that the block pavement is fixed. 2. The method for constructing a block pavement according to claim 1, wherein the aggregate has a single particle size or a continuous particle size. 3. The method according to claim 1, wherein the aggregate is an asphalt-coated aggregate. 4. The method according to claim 1, wherein when the pavement block is provided, a bituminous emulsion is previously applied to the bottom and side surfaces of the pavement block, and the asphalt coating treatment is performed. Item 4. The method for constructing a block pavement according to item 2, item 2 or item 3. 5. The pavement block according to claim 1, wherein a narrow groove is provided on a bottom surface of the pavement block.
Item 5. The method for constructing a block pavement according to item 4 or 4. 6. The block pavement according to claim 1, wherein a fine groove is formed on an upper part of the aggregate layer. How to build. 7. A hollow grooved tube, a coil spring-shaped tube, or a hollow mesh tube, or a combination thereof, is buried in a narrow groove formed above the aggregate layer. 7. The method for constructing a block pavement according to claim 6, wherein 8. An upper surface of an aggregate layer having a lower end at an arbitrary plane position of a joint space formed by arranging a pavement block,
Along the height direction of the pavement block, temporarily provide a plurality of filling materials to block at least up to the upper end of the paving block, and then apply cement asphalt mortar to the joint space surrounded by the filling material. After filling and filling the gap between the aggregate layers, the filling material is removed, and the joint space is uniformly filled with a cement asphalt mortar or an injected joint material other than the cement asphalt mortar. 1st, 2nd, 3rd, 4th, 5th
Item 8. The method for constructing a block pavement according to item 6, 6 or 7. 9. A cement asphalt mortar comprising 50 to 230 parts by weight of an asphalt emulsion per 100 parts by weight of cement,
0 to 100 parts by weight of rapid-hardening admixture, 60 to 330 parts by weight of fine aggregate, 0 to 5 parts by weight of setting modifier, 0 to 0.05 parts by weight of aluminum powder, 0 to 40 parts by weight of expandable admixture, additive 1 to 1 A cement asphalt mortar consisting of 5 parts by weight and added water, claims 1, 2, 3, 4, 5, and 6.
Item 7. The method for constructing a block pavement according to item 7, 7 or 8. 10. The cement according to claim 1, wherein the cement is ordinary Portland cement, early-strength Portland cement, ultra-high-strength Portland cement, moderate heat Portland cement, blast furnace cement,
Any one or two of silica cement, fly ash cement, sulfate resistant cement and jet cement
10. The method for constructing a block pavement according to claim 9, wherein the pavement comprises at least one species. 11. The asphalt emulsion comprising a nonionic polymer-containing asphalt emulsion obtained by mixing the asphalt emulsion and the resin emulsion in a weight ratio of 99 to 75: 1 to 25. 10. The method for constructing a block pavement according to claim 9.