JP7236751B2 - Floorboards with non-slip layer used for temporary passages and construction method for the non-slip layer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a floor plate with an anti-slip layer used for temporary bridges, temporary piers and entry gantrys, temporary passages accompanying road excavation, etc. More particularly, the present invention relates to temporary bridges, temporary piers and entry gantrys, and road excavation. The present invention relates to a construction method for a floorboard (lining board or laying iron plate, checkered steel plate) provided with an anti-slip layer and an anti-slip layer used for temporary passages etc.

Temporary bridges, temporary piers, access platforms, and temporary passages accompanying road excavation are temporary structures that are installed before the main construction work and removed after the main construction work is completed. Temporary bridges are bridges that are built for temporary use, such as bridges that are used for bridge replacement work, emergency bridges that are built in the event that the bridge is damaged by floods or earthquakes, or bridges that are built to allow construction vehicles to pass through. say a bridge Temporary piers and entry gantrys are passages and construction work that are provided for transporting workers, construction machinery, materials, etc. from the shore or shoulder for underwater construction or underwater construction, and construction on excavated floors with height differences. It is used as a work pier for
Metal floorboards are used for these temporary bridges, temporary piers, access gantrys, and temporary passages accompanying road excavation. is used. These floorboards vary in size, floor unevenness, etc., depending on their respective uses.

Of the above-mentioned floorboards, when excavating under the road surface for underground construction or installing a temporary bridge, the lining board is used to cover the road with a temporary support structure that allows cars and people to pass. It is used as a temporary member provided on the upper part of the support structure. The lining plate generally has a single panel structure made by continuously welding a special H-shaped steel with uneven patterns formed on the surface to prevent slipping. are laid side by side.
In addition, iron plates are mainly used at construction and work sites to secure material delivery routes and secure scaffolding for heavy machinery and heavy transport equipment on soft ground with poor scaffolding. A plurality of laying iron plates are laid side by side on the above-described support structure in the same manner as the lining plates.
A checkered steel plate is a metal plate with small grid-like stripes on the surface, and has an anti-slip effect.
While the lining plate has a certain thickness, the laying iron plate and the checkered steel plate are thin plates.

Since these floorboards (covering plate, laying iron plate, checkered steel plate) are made of iron, the slip resistance of the upper surface is reduced, and foreign matter such as oil on the surface of the iron material or hydroplane between the upper surface of the lining plate and the tire in rainy weather. Due to the frequent accidents caused by the phenomenon, it is common to apply anti-slip flooring materials on the upper surface of the conventional floorboards to prevent slipping accidents.
Before applying the non-slip floor material to the top surface of the lining board, mask the anti-slip floor material to prevent it from falling on the edge of the lining board. Apply tape, apply a primer for iron materials, apply anti-slip flooring paint and aggregates to the top surface of the lining board using a spatula or trowel, and then dry it after securing the surface roughness. A non-slip floor was installed. However, a large amount of the anti-slip flooring paint runs down between the masking tape and the edge of the top surface of the lining plate during painting work, resulting in a high loss rate and a problem that the anti-slip flooring material is consumed rapidly. There is Furthermore, there is a problem that waste is generated due to consumption of masking tapes, brushes, and loss of anti-slip flooring paint, and construction time and costs increase. Furthermore, there is a problem that the work efficiency is lowered due to the need for processes such as masking removal and coating/removal of the end portion of the lining plate.

In addition, if the load on the lining plate or the external environment causes distortion, or if multiple pieces are stacked vertically, the non-slip coating layer applied to the top surface of the lining plate will be covered by the load of the lining plate. There is a problem that it peels off from the upper surface of the work board and damage such as cracks occurs. Therefore, the lining board produced by such a construction process has a high defect rate, and wasteful repair work and maintenance costs are incurred, resulting in a decrease in economic efficiency and productivity.
In addition, since the coating of the non-slip flooring material needs to be dried with the conventional lining board, it becomes possible to laminate after about 6 to 8 hours have passed, and rapid construction processing cannot be performed.

Various patented inventions and devices have been proposed as anti-slip measures for covering plates.
In Patent Document 1, a mixture of a curable resin and an aggregate is poured onto an anticorrosive primer applied to the surface of a lining plate to allow the aggregate to settle and the resin to rise to the surface. Before the resin hardens, the non-slip aggregate that is evenly spread is adhered to the floating resin, and then after curing the resin, matte reinforcing resin is applied and cured to make the surface of the lining plate slippery. We are proposing a method of constructing pavement material.
In Patent Document 2, as an anti-slip treatment, the upper surface of a plurality of square steel pipes joined side by side is sprayed with sand, or a sheet-like member or plate-like member that generates friction is attached to the surface. are proposing to
In Patent Document 3, a temporary road surface is formed by covering the upper part of the support structure with a lining plate provided with an anti-slip layer provided on the upper side of the support structure temporarily provided for the passage of cars and people. and an upper plate portion provided on the support structure, and an upper plate portion provided below the upper plate portion to reinforce the support strength against the load applied to the upper plate portion to support the space between the upper plate portion and the support structure. a coating film guide portion projecting upward along the upper edge of the upper plate portion and forming an application space therein; A lining board with a non-slip layer is proposed, including a non-slip layer on which the flooring is painted.

JP-A-8-3907 JP-A-9-296407 Japanese Patent No. 6328840

However, the non-slip layers of Patent Literatures 1 and 2 cannot solve the problem that the coating layer peels off from the upper surface of the lining plate or damage such as cracks occurs. In addition, in the proposal of Patent Document 3, it is necessary to provide a reinforcing portion at the lower portion of the upper plate portion in order to reinforce the supporting strength against the load applied to the upper plate portion of the lining plate, which increases labor and costs. There's a problem. Furthermore, in the lining boards of Patent Documents 1 to 3, when a plurality of lining boards are juxtaposed to form a unit, it is not possible to prevent the adjacent lining boards from being displaced from each other.

In order to solve the above problems, the present invention minimizes the loss of non-slip flooring materials, and sprays polyurea resin to improve the wear resistance, slip resistance, adhesion and installation convenience of the non-slip layer. It is an object of the present invention to provide a floorboard having an anti-slip layer and a construction method thereof.

The invention pertaining to the present application is a temporary floor plate with an anti-slip layer used for temporary bridges, temporary piers and gantrys, temporary passages accompanying road excavation, etc. A slip composed of a polyurea resin formed by a chemical reaction in which a curing agent whose main component is a copolymer of and a main agent whose main component is polyoxypropylenediamine or diethyltoluenediamine are collided and mixed at high pressure and sprayed. It is characterized by comprising a stop layer.

It is preferable that the top surface of the temporary floor board is overlaid with an anti-slip layer, and that at least the upper layer contains aggregate or ceramics. Preferably, the non-slip layer has a three-layer structure comprising an upper layer, a middle layer, and a lower layer, and the upper layer and the middle layer contain aggregate or ceramic. Aggregates may be selected from the group consisting of quartz, silicon dioxide, silicon carbide, jade, glass beads and mixtures thereof, but are not particularly limited. The formed non-slip layer has a thickness of 2 to 5 mm, and is preferably formed according to the dimensions of the temporary floorboard.

In addition, the invention according to the present application is a lining plate in which a plurality of H-shaped steels having the same cross-sectional shape are connected by aligning the height of the flange outer surface and the longitudinal direction, and the upper plate is attached to the top surface and the side plate is attached to the side surface, The upper plate and the side plate are sprayed by colliding and mixing a curing agent whose main component is a copolymer of methylenediphenyl diisocyanate and polypropylene glycol and a main agent whose main component is polyoxypropylenediamine or diethyltoluenediamine at high pressure. It is characterized by having an anti-slip layer made of polyurea resin formed by a chemical reaction at.

The upper plate of the lining plate is preferably laminated with an anti-slip layer, and at least the upper layer contains aggregate or ceramic. Preferably, the upper plate has a three-layered anti-skid layer structure comprising an upper layer, a middle layer and a lower layer, and the upper layer and the middle layer contain aggregate or ceramic. Aggregates may be selected from the group consisting of quartz, silicon dioxide, silicon carbide, jade, glass beads and mixtures thereof, but are not particularly limited. The formed non-slip layer has a thickness of 2 to 5 mm, and is preferably formed according to the dimensions of the temporary floorboard.

Furthermore, the present invention provides a non-slip construction method on the construction surface of a temporary floor board equipped with an anti-slip layer, which is used for temporary bridges, temporary piers and gantrys, temporary passages accompanying road excavation, etc. A surface treatment process for performing surface treatment, a primer application process for applying a primer to the construction surface, a curing agent mainly composed of a copolymer of methylene diphenyl diisocyanate and polypropylene glycol, and polyoxypropylene diamine or and a polyurea spraying step of forming a polyurea resin formed by a chemical reaction by colliding, mixing and spraying a main agent containing diethyltoluene diamine as a main component at high pressure.
The method is characterized by including a step of spraying polyurea resin onto the top surface of the temporary floor plate and then spraying aggregate or ceramics to form a second layer and a third layer. Aggregates may be selected from the group consisting of quartz, silicon dioxide, silicon carbide, jade, glass beads and mixtures thereof, but are not particularly limited. The formed non-slip layer has a thickness of 2 to 5 mm, and is preferably formed according to the dimensions of the temporary floorboard.

Furthermore, the present invention provides a construction surface for a lining plate in which a plurality of H-shaped steels having the same cross-sectional shape are connected by aligning the height of the flange outer surface and the longitudinal direction, and the upper plate is attached to the top surface and the side plates are attached to the four sides. In the non-slip construction method, a base treatment step of applying a base treatment to the base of the construction surface, a primer application step of applying a primer to the construction surface,
A hardening agent whose main component is a copolymer of methylenediphenyl diisocyanate and polypropylene glycol, and a main agent whose main component is polyoxypropylenediamine or diethyltoluenediamine, are sprayed onto the construction surface after collision and mixing at high pressure. and a polyurea spraying step to remove the polyurea resin formed by the reaction.
In addition, the upper plate of the lining plate is characterized by including a step of spraying polyurea resin and subsequently spraying aggregate or ceramic to form a second layer and a third layer. . Aggregates may be selected from the group consisting of quartz, silicon dioxide, silicon carbide, jade, glass beads and mixtures thereof, but are not particularly limited. The formed non-slip layer has a thickness of 2 to 5 mm, and is preferably formed according to the dimensions of the temporary floorboard.

Since the lining plate having the non-slip layer according to the present invention can be quickly constructed, the cost and time required for construction can be reduced, thereby improving economic efficiency. In addition, since polyurea resin is used, damage to the non-slip layer is minimized and durability of the product is improved. In addition, since polyurea resin dries very quickly and hardens, it is possible to form a non-slip layer even if it is tilted immediately after application, without the unevenness of the coating film. This will improve the aesthetics of the product.

Furthermore, since not only the upper plate but also the side plates are provided with the non-slip layer, there is an effect that when a plurality of lining plates are arranged side by side to form a unit, the adjacent lining plates can be prevented from slipping. .

1 is a diagram showing a lining plate having a construction surface according to Example 1. FIG. 1 is a schematic cross-sectional view showing an anti-slip layer finished by the construction method of Example 1. FIG. 1 is a perspective view schematically showing a cross section of an anti-slip layer finished by the construction method of Example 1. FIG. 4 is a flow chart showing steps of a construction method according to Example 1. FIG. FIG. 4 is a diagram showing how a worker sprays a polyurea resin in the construction method according to Example 1; FIG. 4 is a diagram showing how one worker sprays polyurea resin while another worker sprays aggregate in the construction method according to Example 1. FIG. Fig. 2 shows the measurement points of the slip resistance value (BPN) of the iron plate X1 coated with polyurea according to the present application and the lining plate Y1 coated with polyurea according to the present application. 8 is a table and a graph showing results of a demonstration test according to Example 2;

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In each figure, the same parts are denoted by the same numbers, and overlapping descriptions are omitted. In addition, the present invention is not limited to the examples shown below.

Embodiment 1 will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a lining plate having a construction surface according to Example 1. FIG. FIG. 2 is a schematic diagram showing an anti-slip layer finished by the construction method of Example 1. FIG. FIG. 3 is a schematic diagram showing an anti-slip layer finished by the construction method of Example 1. FIG. FIG. 4 is a flow chart showing steps of the construction method according to the first embodiment.

FIG. 1 is a perspective view showing a general covering plate 1. FIG. When excavating under the road surface or installing a temporary bridge for underground construction, the lining plate 1 is used to cover the road and temporarily install a support structure through which cars and people can pass. It is used as a temporary member provided on the top. As shown in FIG. 1, the lining plate 1 has an uneven pattern formed on the upper surface UB for slip prevention.

Please refer to FIG. FIG. 2 is a schematic cross-sectional view showing an anti-slip layer finished by the construction method of Example 1. FIG. Moreover, FIG. 3 is a perspective view schematically showing a cross section of the non-slip layer finished by the construction method of Example 1. As shown in FIG. 2 and 3, the upper surface UB and side surfaces SB of the covering plate 1 are coated with a special primer to form a primer coating layer 11. As shown in FIG. A polyurea resin layer 12 is formed thereon.
A second polyurea resin layer 13 and a third polyurea resin layer 14 are further formed on the upper surface UB. With such a coating structure, it is possible to realize a non-slip layer that is high in strength, resistant to impact and abrasion, and excellent in impact resistance, abrasion resistance, and high load. In addition, the work is completed extremely quickly, including drying.

Here, the polyurea resin will be explained.
Polyurea resin is a resin compound formed by a chemical reaction between isocyanate and polyamine. It cures very quickly, from several seconds to several tens of seconds, and has excellent waterproof, chemical, abrasion, and heat resistance, as well as high flexibility. It is a material that exhibits high conformability to the occurrence and behavior of cracks in the substrate. In view of such material characteristics, the inventor of the present application adopted it as an anti-slip agent for floorboards, etc., and after repeated experiments, compared to conventional coating agents, it is possible to shorten the construction time due to its quick curing effect. Furthermore, it was found that the waterproof, wear-resistant, and flexible properties can prevent slipping between the upper surface of the lining plate and the tire in the event of foreign matter such as oil or in rainy weather.

FIG. 4 is a flow chart showing an example of the steps of the construction method according to the present invention.
Please refer to FIG. The anti-slip layer construction method of Example 1 includes a base treatment step (S110) for applying base treatment to the base of the construction surface, a primer application step (S120) for applying a primer, and a polyurea spraying step (S130). and polyurea spraying and aggregate dispersion step (S140).
Prior to the construction method, as a preparatory step, the surroundings of the construction surface are protected against scattering. In some cases, the lifting holes and side cuts on the construction surface are cured.

The surface treatment step (S110) includes a cleaning step (S111) for cleaning the oily/stained surface of the work surface, an oil treatment/rust treatment/unevenness adjustment/roughening step (S112), and a water content of the work surface. measurement step (S113).
The surface treatment is a pretreatment such as a chipping treatment in which dust or the like is treated with a grinding machine such as a grinder, or a cleaning treatment of removed debris or the like. Specifically, the condition of the surface to be worked on is carefully checked, cleaned, and contaminants such as oil, soil, and mud adhering to it are removed. It also removes rust and existing paint. In addition, unevenness is adjusted and the surface of the construction surface is roughened with a keren. Furthermore, the moisture content of the construction surface is measured with equipment, and after confirming that the moisture content is 8% or less, the process proceeds to the next step.

In the primer application step (S120), a primer is applied as a surface treatment agent on the construction surface to form the primer application layer 11 shown in FIGS. The primer is applied by spraying or hand painting. Also, the primer is preferably applied by weighing the main agent and the curing agent in a ratio of 2:1, and sufficiently stirring the mixture.

In the polyurea spraying step (S130), the polyurea resin P used is composed of a curing agent mainly composed of a copolymer of methylene diphenyl diisocyanate and polypropylene glycol and a main agent mainly composed of polyoxypropylene diamine or diethyltoluene diamine. It is formed by a chemical reaction that impinges, mixes, and injects.
Note that in the polyurea spraying step (S130), work is performed after confirming whether the primer applied in the primer coating step (S120) is cured and whether the coated surface is dry. In addition, in advance, using a dedicated machine (reactor) in which two drums are set, the spray gun L1 for exclusive use of polyurea, which has been supplied with the above-mentioned curing agent and main agent as the material of the polyurea resin P, is set. , to ensure that the polyurea resin P is properly cured, and to carry out the spraying operation.

Please refer to FIG. FIG. 5 is a diagram showing how a worker sprays the polyurea resin P in the construction method according to the first embodiment.
As shown in FIG. 5, a worker W1 is spraying a polyurea resin P onto the upper surface UB of the lining board 1 using a polyurea spray gun L1. Note that the surface hardening time of the polyurea resin P is 5 to 10 seconds, so it is necessary for the operator W1 to quickly spray in the direction of the arrow in FIG. In the polyurea spraying step (S130), the polyurea resin P is sprayed directly onto the construction surface from a distance of about 1 m.

The base treatment step (S110), the primer application step (S120), and the polyurea spraying step (S130) described above are commonly performed on the upper surface UB and the side surfaces SB.

For the upper surface UB, in addition to the above steps, the polyurea spraying and aggregate scattering steps (S140) are performed. That is, after the polyurea spraying step (S130), the second polyurea resin layer 13 and the third polyurea resin layer 14 are formed. to scatter.
Please refer to FIG. FIG. 6 is a diagram showing how one worker W1 sprays polyurea resin P while another worker W2 sprays aggregate K in the construction method according to the first embodiment. As shown in FIG. 6, a worker W1 uses a polyurea spray gun L1 to spray polyurea resin P onto the upper surface UB of the covering plate 1, and a worker W2 uses a lysing gun L2 to spray aggregate K. are doing. Note that the surface hardening time of the polyurea resin P is 5 to 10 seconds, so it is necessary for the operator W1 to quickly spray in the direction of the arrow in FIG. In the polyurea spraying step (S140), the polyurea resin P is sprayed directly onto the construction surface from a distance of about 1 m.
The aggregate K can be selected from the group consisting of quartz, silicon dioxide, silicon carbide, jade, glass beads and mixtures thereof.

Polyurea resin P may be scattered and sprayed onto the upper surface UB after the above steps have been completed. Sprinkling and spraying polyurea resin P is not about 2m away from the upper surface UB and direct spraying, but aiming for a space about 20 to 30cm above the upper surface UB. Let

Clean up after completing the above work. When cleaning up the curing material, be sure to wear a mask, etc., so as not to inhale the flying powder. Also, after confirming that all scattered objects are gone, remove safety equipment such as protective clothing.

Example 2 will be described with reference to tables and drawings. Table 1, which will be described later, shows the results of the demonstration test according to Example 2.
In Example 2, the anti-slip effect is recognized by having the anti-slip layer in the temporary floor plate with the anti-slip layer used for temporary bridges, temporary piers, boarding platforms, temporary passages accompanying road excavation, etc. The fact that a demonstration test was conducted to determine whether the
The technical standards of the Japan Road Association stipulate that "if necessary, add a slip resistance value as a pavement performance index", and it is necessary to measure the value, that is, the BPN value. In addition, according to the "Pavement construction management guidelines (July 2nd year of Reiwa)" that stipulates standard values for slip resistance values in NEXCO East Japan, Central Japan, and West Japan, a standard value of BPN value of 60 or more is set for roadways. Therefore, in the demonstration test according to Example 2, it was decided that the BPN value of the temporary floorboard provided with the anti-slip layer should be verified to be at least 60 or more.

The demonstration test according to Example 2 was conducted at NIPPO Co., Ltd. Kansai Branch Laboratory (441 Choanji-cho, Yamatokoriyama City, Nara Prefecture).
Regarding the selection of test methods, the technical standards of the Japan Road Association mentioned above specify the following three types of test methods. That is, a method using a sliding friction coefficient by a slip resistance measuring wheel, a method using a dynamic friction coefficient by a DF tester, and a pendulum type skid resistance tester. As a result of examining the demonstration test related to Example 2, there are only 7 slip resistance measurement vehicles nationwide and the test cannot be performed on the desired date, so it was rejected. It was rejected due to large variations, and the pendulum-type skid resistance tester was judged to be suitable for this verification test because of its small variations.
Here, the pendulum-type skid resistance tester is a tester in which the pavement surface to be measured is sufficiently sprinkled with water, then the slider is swung down and brought into contact with the surface to be measured, and the resistance value at that time is read and recorded on a scale. (BPN) can be determined.

Regarding the demonstration test, four times (July 1, 2020, September 7, November 12, January 7, 2021) at intervals of once every two months from the start of the test in July 2020 carried out.
For each of the above-mentioned demonstration tests, two iron plates (size: 1830 mm × 915 mm) coated with polyurea according to the present application (X1, X2) and two lining plates (size: 3000 mm × 1000 mm) coated with polyurea according to the present application were used. Sheets Y1 and Y2, and for comparison with these figures, a lining plate coated with a non-slip special synthetic resin paint "Nunslide (registered trademark)" from Dainippon Toryo Co., Ltd. (dimensions: 3000 mm × 1000 mm, hereinafter , simply referred to as “Nunslide lining plate”). The polyurea-coated iron plate and the polyurea-coated lining plate, which were prepared in pairs, were selected at random, and the coating was not superior or inferior.
FIG. 7 shows the measurement points x11, x12, and x13 of the iron plate X1 coated with polyurea according to the present application, and the measurement points y11, y12, and y13 of the slip resistance values (BPN) of the lining plate Y1 coated with the polyurea according to the present application. indicates Although not shown, the measurement points of the slip resistance value (BPN) are the iron plate X2 at the same locations x21, x2, and x23 as X1, and the lining plate Y2 at the same locations y21, y22, and y23 as Y1. . For the Nanslide® lining (not shown), measurements were taken at the center of the lining.

Table 1 below lists the slip resistance values (BPN) measured in each demonstration test. Each time, the road surface temperature at the measurement point was measured, and the measurement was performed on the wet road surface.
Table 1 is explained in detail.
The slip resistance values (BPN) at the measurement points x11, x12, and x13 of the polyurea-coated iron plate X1 were 66, 66, and 67 on July 1, 69, 66, 66, and November on September 7, respectively. It showed 77, 74, 74 on the 12th and 85, 82, 80 on January 7th. The slip resistance values (BPN) at measurement points x21, x22, and x23 of iron plate X2 coated with polyurea were 69, 71, 74 on July 1, 73, 73, 73 on September 7, and November, respectively. It showed 79, 79, 80 on the 12th and 85, 89, 88 on January 7th.
The slip resistance values (BPN) at measurement points y11, y12, and y13 of covering plate Y1 coated with polyurea were 55, 67, and 66 on July 1, 76, 75, and 78 on September 7, respectively. It showed 89, 84, 85 on November 12th and 91, 93, 95 on January 7th. The slip resistance values (BPN) at measurement points y21, y22, and y23 of covering plate Y2 coated with polyurea were 54, 54, and 62 on July 1, 78, 75, and 72 on September 7, respectively. It showed 83, 85, 83 on November 12th and 85, 90, 89 on January 7th.
The slip resistance value (BPN) of the Nanslide (registered trademark) lining plate was 83 on July 1, 71 on September 7, 78 on November 12, and 83 on January 7, respectively. rice field.

Then, after the measurement on January 7, the correction value at the road surface temperature of 20° C. was calculated according to Equation 1. Table 2 shows correction values for each measurement point.
That is, the average correction values of the measurement points x11, x12, and x13 of the polyurea-coated iron plate X1 (July, September, November, and January) are 72, 73, 76, and 72, and the polyurea-coated iron plate The average correction values of measurement points x21, x22, and x23 of X2 were 77, 79, 79, and 77, respectively.
In addition, the average correction values of measurement points y11, y12, and y13 of polyurea-coated lining plate Y1 were 66, 83, 86, and 83, and the measurement points of y21, y22, and y23 of iron plate y2 coated with polyurea were The average corrected values of were 61, 82, 83, and 78.
On the other hand, the correction values for each time of the Nanslide (registered trademark) lining plate were 88, 78, 77, and 73.

FIG. 8 shows the results of the demonstration test according to Example 2, the average correction value of each time of the polyurea-coated iron plates X1 and X2, the average correction value of the polyurea-coated lining plates Y1 and Y2, and the nonslide ( 1 is a table and a graph comparing correction values of a registered trademark) lining plate. As shown in Table 2 and FIG. 8, as a result of measurement with a pendulum type skid resistance tester, the skid resistance value (BPN) of the lining plate and iron plate provided with the anti-slip layer according to the present application is the standard for a BPN value of 60 or more on the roadway proved to exceed the value In addition, the slip resistance value (BPN) of the lining plate and the iron plate provided with the anti-slip layer according to the present application is the commercially available non-slip special synthetic resin paint "Nunslide (registered trademark)" of Dainippon Toryo Co., Ltd. Compared to the slip resistance value (BPN) of the lining plate coated with , the measured value in July is low, but the average corrected values in September, November, and January are all higher than that. .

In the above, preferred embodiments of the construction method of the covering plate provided with the non-slip layer and the construction method of the non-slip layer according to the present invention have been described, but various modifications are possible without departing from the technical scope of the present invention. will be understood.

The construction method according to the present invention can be applied in a short time regardless of whether it is construction in a narrow place or a large area. It can also be used for concrete floors, etc., and can be used in a wide range.

1 Y Covering plate 11 Primer layer 12 Polyurea layer 13 14 Polyurea layer containing aggregate S110 Substrate treatment step S111 Oil surface/dirt surface cleaning S112 Oil treatment/rust treatment/unevenness adjustment/roughening S113 Moisture content of construction surface Rate measurement S120 Primer application step S130 Polyurea spraying step S140 Polyurea spraying and aggregate spraying step P Polyurea K Aggregate L1 L2 Spraying device W1 W2 Worker X Iron plate

Claims (2)

Temporary floorboards with a non-slip layer used for temporary bridges, temporary piers and access platforms, temporary passages accompanying road excavation, etc.
A curing agent containing a copolymer of methylenediphenyl diisocyanate and polypropylene glycol as a main component and a main agent containing polyoxypropylenediamine or diethyltoluenediamine as a main component are sprayed onto the top surface and side surfaces by colliding and mixing them at high pressure. Equipped with an anti-slip layer made of polyurea resin formed by a chemical reaction in
The top surface is formed according to the dimensions of the temporary floorboard, with the non-slip layer having a thickness of 2 to 5 mm, and has a three-layer structure of an upper layer portion, a middle layer portion, and a lower layer portion. A temporary floorboard characterized by containing aggregate or ceramic in part. A lining plate in which a plurality of H-section steels having the same cross-sectional shape are connected by aligning the height of the flange outer surface and the longitudinal direction, and the upper plate is attached to the top surface and the side plate is attached to the side surface,
The upper plate and the side plate are sprayed by colliding and mixing a curing agent mainly composed of a copolymer of methylenediphenyl diisocyanate and polypropylene glycol and a main agent mainly composed of polyoxypropylenediamine or diethyltoluenediamine at high pressure. Equipped with an anti-slip layer made of polyurea resin formed by a chemical reaction in
The upper plate has a thickness of 2 to 5 mm, and is formed according to the dimensions of the temporary floor plate. A lining plate characterized by containing aggregate or ceramic in part.

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