JP2002234764A - Slurried mortar and mortar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide slurried mortar capable of easily performing on-site execution matching with the shape to be executed with an inexpensively available material to an overturning accident due to a slip frequently occurring at a labor accident, a home, etc., capable of continuing its effect over a long period and capable of easily repairing when the reduction of the effect such as deterioration and cracking in emergency is caused, and to provide mortar formed by using the slurried mortar. SOLUTION: The slurried mortar contains 55-70 wt.% fine aggregate, 10-25 wt.% cement, 5-20 wt.% aqueous resin and 10-25 wt.% water. The mortar contains 60-85 wt.% fine aggregate, 11-30 wt.% cement and 6-25 wt.% aqueous resin. As the aqueous resin, for example, one or more kinds selected among an acrylic aqueous resin, an epoxy-based aqueous resin and an urethane-based aqueous resin can be used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mortar containing fine aggregate, cement, an aqueous resin and water, and a mortar obtained by solidifying the slurry mortar and having excellent slip resistance and abrasion resistance.

[0002]

2. Description of the Related Art In a kitchen of a restaurant or a cafeteria, people come and go very busy, and food juices and ingredients, oil during cooking splash and spill, and the floor surface is very slippery. The floor is made of concrete that is inexpensive, durable, and relatively slippery against such dirt.However, when people pass each other in a small cooking place, they move in an unreasonable posture, so that they can prevent falling. Had no anti-slip effect.

[0003] In a factory, machine oil is scattered,
The feet around the machinery and equipment were also slippery, and as a result of falling, the human body was caught in the peripheral machinery and equipment, and the risk of injuries was increased and the risk of death was extremely great.

[0004] In some cases, an iron plate is laid on irregularities such as grooves formed in road construction to cover the emergency.
Since the surface of the iron plate is smooth, there is a danger that pedestrians, automobiles and the like will slip and cause an accident.

[0005] In addition, many of the accidents at the construction site are caused by slipping or falling due to slipping, and any of the above-mentioned occupational accidents has been regarded as a serious accident cause.

In recent years, even at home, the floor of a bathhouse,
Bathtubs, washroom floors, dressing rooms, and toilet floors are very slippery places for the elderly, and accidents involving the elderly falling frequently occur in these places.

[0007] In addition, the poolside, the wharf, the sidewalk, the slope, the emergency stairs, and the like have a problem of a fall accident due to a slip, and a manager is often held responsible for the accident.

[0008]

At present, anti-slip mats have been introduced to prevent the above-mentioned locations from slipping. However, the mats need to be processed according to the object to be used or the locations. Take it. In addition, in order to use the mat as a part of the whole, the mat itself must be fixed to the floor surface so as not to slip, and as soon as the mat is fixed, the advantage of the portable mat is lost.

[0009] A commercially available non-slip coating material is
It is only necessary to apply and apply according to the shape and area of the target floor surface, and it is said that the usability is good, but the effect is often 1 to 2 years, and if you do not always know when the effect is effective, It is dangerous for pedestrians who are hard to notice it.

According to the present invention, it is easy to perform on-site construction in accordance with the shape of a construction object with a material that can be obtained at a low cost, and the effect can be maintained for a long period of time in case of a work accident, a fall accident caused by slipping frequently at home, etc. It is an object of the present invention to provide a slurry-like mortar that can be easily repaired in the event that effects such as deterioration and cracking are reduced, and a mortar formed using the same.

[0011]

The slurry-like mortar according to the present invention has a fine aggregate of 55% to 70% by weight, a cement of 10% to 25% by weight, and an aqueous resin of 5% to 5% by weight.
20 wt% and water are contained in the range of 10 wt% to 25 wt%.

Here, the fine aggregate is 55 wt% to 70 wt%.
The reason is that when the amount of fine aggregate is less than 55 wt%, the frictional force is reduced and the anti-slip effect cannot be expected, and 70 wt%
When the amount exceeds 55%, the amount of water used increases, the mortar after drying and solidification becomes brittle, and there is a disadvantage that cracks and peeling occur. However, if the fine aggregate is 55 wt% to 70 wt%, there is no such disadvantage, and desired This is because a mortar having mechanical properties can be obtained.

As the fine aggregate, one or two or more selected from sand, ceramics (eg, glass chips), rubber chips, FRP chips, fly ash, zeolite, cork chips, charcoal powder, and stone processing chips are used. can do.
Glass / ceramic waste has a particularly large anti-slip effect.

When sand is used as the fine aggregate, the size of the sand is preferably from 10 mesh to 70 mesh. The reason why the size of the sand is set to 10 mesh to 70 mesh is that if the size of the sand is larger than 10 mesh, the eyes become too coarse, and if the size of the sand is smaller than 70 mesh, the anti-slip effect becomes too small. Is between 10 mesh and 70 mesh without such inconvenience and a mortar having a desired anti-slip effect can be obtained.

[0015] Further, the cement is 10 wt% to 25 wt%.
The reason is that if the cement content is less than 10% by weight, the fine aggregates do not sufficiently adhere to each other, become brittle, have no strength, and
If it exceeds 5 wt%, it becomes brittle against impact, cracks easily occur, and the flexural strength decreases. However, if the cement content is 10 wt% to 25 wt%, there is no such disadvantage, and desired mechanical properties are obtained. Is obtained.

As the cement, Portland cement (JIS R 5210) or mixed cement (JIS
R 5211-5213) can be used.
Portland cement is usually Portland cement,
Includes early-strength Portland cement, ultra-high-strength Portland cement, moderate heat Portland cement, and sulfate-resistant Portland cement. Blended cement includes blast furnace cement, silica cement, and fly ash cement.

The reason why the amount of the aqueous resin is set to 5 wt% to 20 wt% is that when the amount of the aqueous resin is less than 5 wt%, the adhesive force is reduced, the abrasion resistance is deteriorated, and the abrasion is liable to occur.
%, The construction cost becomes excessively high, the adhesive strength at the time of drying remains, there is a disadvantage that dust easily adheres, and cleaning becomes difficult. However, when the aqueous resin is 5 wt% to 20 wt%, such a problem is caused. This is because a mortar having desired mechanical properties can be obtained without inconvenience.

As the aqueous resin, for example, one or more selected from an acrylic aqueous resin, an epoxy aqueous resin and a urethane aqueous resin can be used. May be used.
In addition, additives can be used depending on the application.

The reason why the water content is set to 10 wt% to 25 wt% is that if the water content is less than 10 wt%, kneading, spraying and forming become difficult. This is because mortar having desired mechanical properties can be obtained without such inconvenience when the water content is 10 wt% to 25 wt%. The water content contained in the aqueous resin is included in this numerical range (wt%), and the numerical value range (wt%) of the aqueous resin excludes the water.

In the mortar according to the present invention, the fine aggregate is 60 wt% to 85 wt%, and the cement is 11 wt% to 3 wt%.
0 wt% and an aqueous resin in the range of 6 wt% to 25 wt%.

Here, the fine aggregate is added in an amount of 60 wt% to 85 wt%.
The reason is that when the fine aggregate is less than 60 wt%, the frictional force is reduced and the anti-slip effect cannot be expected, and
If the mortar is more than 50%, the mortar becomes brittle and cracks or peels off.
When the content is set to t%, such a disadvantage does not occur and a mortar having desired mechanical properties can be obtained.

As the fine aggregate, one or two or more selected from sand, ceramics (such as glass chips), rubber chips, FRP chips, fly ash, zeolite, cork chips, coal powder, and stone processing chips are used. can do.
Glass dust has a particularly large anti-slip effect.

When sand is used as the fine aggregate, the size of the sand is preferably 10 mesh to 70 mesh. The reason why the size of the sand is set to 10 mesh to 70 mesh is that if the size of the sand is larger than 10 mesh, the eyes become too coarse, and if the size of the sand is smaller than 70 mesh, the anti-slip effect becomes too small. Is between 10 mesh and 70 mesh without such inconvenience and a mortar having a desired anti-slip effect can be obtained.

In addition, cement is used in an amount of 11 wt% to 30 wt%.
The reason is that if the cement content is less than 11% by weight, the fine aggregates do not sufficiently adhere to each other, become brittle, and have no strength.
If it exceeds 0 wt%, it becomes brittle to impact, cracks are easily formed, and the bending strength is disadvantageously reduced. However, if the cement content is 11 wt% to 30 wt%, there is no such disadvantage, and desired mechanical properties are obtained. Is obtained.

As the cement, Portland cement (JIS R 5210) or mixed cement (JIS
R 5211-5213) can be used.
Portland cement is usually Portland cement,
Includes early-strength Portland cement, ultra-high-strength Portland cement, moderate heat Portland cement, and sulfate-resistant Portland cement. Blended cement includes blast furnace cement, silica cement, and fly ash cement.

The reason why the amount of the aqueous resin is set to 6 wt% to 25 wt% is that when the amount of the aqueous resin is less than 6 wt%, the adhesive force is reduced, the abrasion resistance is deteriorated, and the abrasion is liable to occur.
%, The construction cost becomes too high, the adhesive strength at the time of drying remains, dust easily adheres, and cleaning becomes difficult. However, when the aqueous resin is 6 wt% to 25 wt%, such a problem is caused. This is because a mortar having desired mechanical properties can be obtained without inconvenience.

As the water-based resin, for example, one or more selected from an acrylic water-based resin, an epoxy water-based resin, and a urethane-based water-based resin can be used. May be used.
In addition, additives can be used depending on the application.

The mortar according to the present invention contains some water in addition to the above-mentioned components depending on the degree of drying. The cement as a component of the slurry-like mortar refers to the cement before hardening, and the cement as the component of the mortar refers to the cement after hardening. Also,
The aqueous resin that is a component of the slurry mortar refers to an aqueous resin before curing, and the aqueous resin that is a component of the mortar refers to an aqueous resin after curing.

Further, the ratio of the component composition of the mortar described above was calculated by calculation based on the numerical range of the component composition of the slurry mortar excluding water.

[0030]

FIG. 1 is a process diagram showing a process for forming a mortar according to the present invention. As shown in the figure, fine aggregate, cement, an aqueous acrylic resin, and water were weighed and kneaded to obtain a slurry-like mortar. Here, the fine aggregate is 50 wt% or more.
75wt%, cement is 8wt% ~ 30wt%, acrylic aqueous resin is 4wt% ~ 25wt%, water is 8wt% ~
30 wt%.

Next, the mortar in the form of a slurry was poured into a plate-shaped mold, cured for 48 hours, air-dried for another week, and the properties of the obtained mortar were examined.

According to this experiment, as shown in Sample No. 8, when the fine aggregate content was 50 wt%, the frictional force was reduced and the anti-slip effect could not be expected. Is 75 wt%, the amount of water used increases, the mortar after drying and solidification becomes brittle, and there is a disadvantage that cracks and peeling occur. However, as shown in Sample Nos. 9 to 12, the fine aggregate is 55 wt% to 70 wt%. It can be seen that mortar having desired mechanical properties can be obtained without such inconvenience.

Further, as shown in Sample No. 14, when the cement content was 8 wt%, the fine aggregates did not adhere sufficiently to each other, and became brittle, resulting in a disadvantage that strength was not obtained. As shown in Sample No. 19, When the cement content is 30 wt%, it becomes brittle against impact, cracks easily occur, and the flexural strength decreases. However, as shown in Sample Nos. 15 to 18, when the cement content is 10 wt% to 25 wt%, there is no such inconvenience. It can be seen that a mortar having desired mechanical properties can be obtained.

Further, as shown in Sample No. 20, when the content of the acrylic water-based resin is 4 wt%, the adhesive strength is reduced, the abrasion resistance is deteriorated, and the acrylic resin is easily worn away.
As shown in Sample No. 26, the acrylic water-based resin
When the content is wt%, the construction cost becomes too high, the adhesive strength at the time of drying remains, dust easily adheres, and the cleaning becomes difficult. However, as shown in Sample Nos. 21 to 25, an acrylic aqueous resin is used. However, when the content is 5 wt% to 20 wt%, there is no such disadvantage, and it can be seen that mortar having desired mechanical properties can be obtained.

As shown in Sample No. 27, the water content was 8%.
When it becomes wt%, kneading and spraying become difficult,
As shown in Sample No. 32, when water becomes 30 wt%, coagulation is slowed down, and there is a disadvantage that components are separated.
As shown in FIG. 31, it is found that when water is 10 wt% to 25 wt%, such a disadvantage does not occur and a mortar having desired mechanical properties can be obtained.

Next, the slurry-like mortar was applied on an iron plate and solidified, and the frictional force was measured. The results are as shown in Table 1.

From the results of this experiment, it is understood that when mortar is applied on an iron plate, the frictional force becomes extremely large. In particular, regarding the size of the fine aggregate, as shown in Sample No. 7, there is an inconvenience that the non-slip effect is reduced when the mesh size is 80 mesh, but as shown in Sample Nos.
It can be seen that mortar having desired mechanical properties can be obtained without such inconvenience with 0 mesh to 70 mesh.

[0038]

[Table 1]

In the above embodiment, the acrylic resin was used as the aqueous resin. However, similar results were obtained when the epoxy resin or the urethane resin was used as the aqueous resin.

[0040]

According to the present invention, it is possible to prevent a fall in a slippery place such as a floor of a kitchen in a cafeteria or a restaurant, a repair / repair site of a railway car, or a slippery place in a home. .

Further, according to the present invention, since inexpensive raw materials are used, anti-slip work is performed on slippery places such as floors in cafeterias and restaurants, repair / repair sites for railway vehicles, and slippery places in homes. Can be constructed at low cost regardless of the shape and area of the target floor surface.

Further, according to the present invention, there is an effect that a floor surface excellent in slip resistance and abrasion resistance (durability) can be formed as compared with ordinary cement concrete.

[Brief description of the drawings]

FIG. 1 is a process chart showing a mortar forming process according to the present invention.

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Claims (10)

[Claims] 1. Fine aggregate: 55 wt% to 70 wt%, cement: 10 wt% to 25 wt%, aqueous resin: 5 wt%
A slurry-like mortar containing 20 wt% and water in a range of 10 wt% to 25 wt%. 2. The slurry mortar according to claim 1, wherein the fine aggregate is made of sand, and the size of the sand is 10 to 70 mesh. 3. The fine aggregate is selected from one or two or more selected from sand, ceramic (such as glass chips), rubber chips, FRP chips, fly ash, zeolite, cork chips, charcoal powder, and stone processing chips. The slurry-like mortar according to claim 1 or 2, wherein 4. The cement according to claim 1, wherein the cement is Portland cement and / or mixed cement.
A mortar in a slurry form according to any one of claims 1 to 3. 5. The aqueous resin according to claim 1, wherein the aqueous resin is at least one selected from an acrylic aqueous resin, an epoxy aqueous resin, and a urethane aqueous resin.
A mortar in the form of a slurry according to any one of claims 4 to 4. 6. The fine aggregate is 60 wt% to 85 wt%, the cement is 11 wt% to 30 wt%, and the aqueous resin is 6 wt%.
Mortar characterized by being contained in a range of 25 wt%. 7. The mortar according to claim 6, wherein the fine aggregate is made of sand, and the size of the sand is 10 mesh to 70 mesh. 8. The fine aggregate is selected from one or two or more selected from sand, ceramic (such as glass chips), rubber chips, FRP chips, fly ash, zeolite, cork chips, charcoal powder, and stone processing chips. Mortar according to claim 6 or 7, characterized in that: 9. The cement according to claim 6, wherein the cement is Portland cement and / or mixed cement.
A mortar according to any one of claims 1 to 8. 10. The aqueous resin is an acrylic aqueous resin,
The mortar according to any one of claims 6 to 9, wherein the mortar comprises one or more selected from an epoxy-based aqueous resin and a urethane-based aqueous resin.