JPS63219754A - Execution of self-leveling floor material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of constructing a self-leveling flooring material (rolled flooring material, hereinafter referred to as SL material).

[Prior art]

SL material takes advantage of its self-smoothness, which occurs when it is kneaded with water to form a slurry, and is cast onto a base material to form a horizontal surface, then hardened to create a smooth surface. Used to obtain the floor surface.

Since this slurry has curability, the time it takes to exhibit self-smoothness is limited. If this time is considered as the pot life, the pot life of SL material soot generally depends on the material type/composition, water ratio, etc.
Although it varies depending on conditions such as temperature, it is about 10 to 120 minutes.

If the area where the SL material soot slurry (hereinafter also simply referred to as slurry) is placed or the volume of the slurry placed is large and the pot life will be exceeded from the start to the end of the slurry placement, use a dragonfly. Even after leveling the entire surface, SL
In areas where the material has progressed to harden and the fluidity of the slurry has decreased, there is a problem in that uneven leveling of register marks occurs, making it impossible to obtain satisfactory horizontal accuracy and flatness of the finished floor surface.

In this way, there are restrictions on the pot life of SL material soot to maintain its fluidity, and as a countermeasure to this problem, conventionally, when pouring SL material soot, the area of the entire pouring area and the volume of slurry to be poured are large. In some cases, the slurry kneading ability,
In order to obtain an appropriate slurry pouring volume according to the capacity of the pouring pump, before pouring, divide the subfloor surface into appropriate sections using wooden or various plastic partitions, and divide the subfloor surface into sections. After sealing the gaps between the materials to prevent the slurry from leaking, pour the slurry, and wait until the slurry has hardened and the surface can be easily walked on.Usually, the next day after the slurry is poured, the material is poured. The construction method adopted is to remove the wood, repair the area where the wood was removed using a repair material such as hardened SL material or cement mortar, and after the repair material has hardened, level it with a sander, etc. to finish the work. It is being

[Problem that the invention seeks to solve]

In the conventional method, as mentioned above, it is necessary to install and seal the wood, and also to remove the wood after the slurry has hardened.
After the removal site has been repaired and the repaired area has hardened,
The disadvantage is that the work process is complicated, as it requires a smooth finish using a sander, etc., and efficiency is low.

The present invention provides a method that allows slurry to be cast without being restricted by the pot life of SL material, saves labor during construction, and improves the horizontal accuracy and flatness of the finished floor surface. The purpose is to provide.

[Means for solving problems]

The present inventors have devised the temporary partition material used when pouring SL material soot slurry and its handling.
Material slurry - Can be poured without being restricted by its pot life, easy to install temporary partition materials before slurry pouring, and easy to move temporary partition materials after slurry pouring, The present invention was completed after discovering that it is possible to save labor during construction because it does not require work such as removal and repair and leveling of the removal trace, and it is also possible to improve the horizontal accuracy and flatness of the finished floor surface. . That is, the present invention provides a method for pouring self-leveling flooring slurry while partitioning the base floor surface into two or more sections using a temporary partition material, Steps (1), (2)
A method for constructing a self-leveling flooring material, characterized by successively repeating steps (3) and (3).

Step (1): Install a temporary partition material on the base floor surface and create a temporary partition section with an area such that the time required to cast the self-leveling flooring slurry to a predetermined level is within the pot life of the slurry. Create.

Step (2): The slurry is placed on the inside and outside of the obtained temporary partition section with temporary partition materials in between.

Step (3): Next, the temporary partition material is removed while the poured slurry retains its fluidity.''

In the method of the present invention, commonly used gypsum-based or inorganic cement-based SL materials can be used.
L materials include those based on gypsum such as α-hemihydrate gypsum, β-hemihydrate gypsum, and type anhydrite, and inorganic cement-based SL materials include ordinary Portland cement and early-strength Portland cement.

Examples include those based on cements such as ultra early strength Portland cement, moderate heat Portland cement, special Portland cement, blast furnace cement, fly ash cement, rapid hardening cement, and alumina cement.

These base materials include river sand, mountain sand, sea sand, and silica sand.

Various lightweight aggregates, slags, fly ash and other fine aggregates can be mixed, and if necessary, this type of S
Various additives such as dispersants, thickeners, antifoaming agents, expansion inhibitors, shrinkage inhibitors, and setting regulators used in the L material can be blended.

The SL material slurry in the present invention refers to a slurry prepared by adding appropriate water and/or polymer dispersion to the SL material and kneading the mixture.

The pot life of SL material slurry means the time during which the slurry maintains fluidity and exhibits self-smoothness. In the present invention, the state in which the slurry maintains fluidity refers to the state in which the flow value of the slurry is 70 mm or more, preferably 130 mm or more, and more preferably 150 m+++ or more.

The test method for the flow value of SL materials is as per the Housing and Urban Development Corporation Act.
III), fill the frame with the kneaded sample, pull up the open frame, and after the spread of the mixed sample has stopped, measure the diameters in two perpendicular directions, and use the average value as the flow value.

The temporary partition material used in the present invention is one that can hold up the poured SL material soot to ensure a predetermined pouring level and is easily movable. However, the material and shape are not limited.

Examples of the material include metal, wood, bamboo, synthetic resins such as polystyrene, polyethylene, and polyvinyl chloride, and various natural or synthetic fibers. In addition, those having water absorbing properties may be used after being treated with salt water using a water-adding agent.

The shape may be a fixed shape such as a round bar shape, a square bar shape, a plate shape, or a lobe shape or a tubular shape that has the flexibility to set a free partition shape, and the cross-sectional shape is not limited. Various fiber ropes, soft synthetic resin pipes, and the like can be suitably used as the temporary partition material of the present invention.

If the subfloor is uneven and a gap is created between the temporary partition material and the subfloor, use a temporary partition made of a material that is flexible enough to adapt to the unevenness of the subfloor, or the part that contacts the subfloor. It is preferable to use a temporary partition made of the above-mentioned flexible material. Examples of such flexible material include sponge or synthetic resin processed into a sponge shape, such as foamed polyurethane resin. can be mentioned. In addition, in the method of the present invention, leakage of the pouring slurry from the gap between the temporary partition material and the subfloor is allowed as long as it is possible to ensure a predetermined pouring thickness of the pouring slurry.

The temporary partition material preferably has an appropriate length to form a temporary partition section on the subfloor surface, and its width is preferably as narrow as possible to ensure the above-mentioned function.

In addition, when using temporary partition material with a specific gravity lower than the specific gravity of the SL material slurry to be cast, either press the temporary partition material with a heavy object to prevent it from lifting up, or temporarily fix it to the subfloor with nails, etc. It may be temporarily fixed with an easily peelable adhesive.

The area of the section to be partitioned using temporary partition materials is the SL used.
Material slurry: Determined according to injection rate and pot life.

That is, the time required to pour the slurry to a predetermined level in one compartment is within the pot life of the slurry, and more preferably, the predetermined level is poured into two adjacent compartments with a temporary partition material in between. A temporary partition section is created by installing a temporary partition material on the base floor surface so that the time required for pouring the slurry is within the pot life of the slurry.

When using SL material soot slurry with a short pot life or when the slurry injection rate is low, the compartment area should be made smaller.When using a slurry with a long pot life or when the slurry injection rate is high, the compartment area should be reduced. can be made larger.

The SL material soot slurry casting procedure in the method of the present invention is performed in the first step.
This will be explained using figures. As shown in middle section ■ in Figure 1, temporary partition materials are installed at position a on the base floor surface, and also at position b as necessary, to create temporary partition sections ■ and ■ of appropriate areas. to make.

Either the slurry is injected to a predetermined level into both the resulting compartments ■ and ■ (method A), or the slurry is injected into the compartment ■ to a predetermined level, while the entire surface of the compartment ■ side is injected. Even if the slurry is not filled to a predetermined level, as soon as the slurry reaches a predetermined level along the temporary partition material that separates compartment ■ and compartment ■ (method B), Level the poured slurry with a dragonfly, and while the slurry maintains fluidity, a.
Remove the temporary partition material installed at the location.

The removed temporary partition material can be used as a temporary partition material to create sections after ■ if necessary. In other words, in this case, move the temporary partition material from position a to position C and create section ■ Inject the slurry to a predetermined level in (2) and (3), level the poured slurry with a dragonfly as necessary, and remove the temporary partition material installed at position (b) while the slurry maintains its fluidity.

By repeating these operations sequentially and continuously, even if the area to be poured is large or the volume of slurry to be poured is large, SL material slurry can be cast without being substantially restricted by the pot life of the slurry. can be set.

When the temporary partition material is removed while the poured SL material slurry maintains its fluidity, that is, the flow value of the slurry is within the above range, the slurry will flow from both sides into the space between the two adjacent compartments. There will be no difference in level.

The method of the present invention surprisingly improves the horizontal accuracy of the finished floor surface by removing the partition material before the cast SL material slurry has hardened, which was not done in conventional methods. It can improve flatness and also make it possible to save a lot of labor during construction.

〔Effect of the invention〕

■) SL material soot slurry has a formulation that cures in a short time, making it possible to install SL material in areas that require large areas or large volumes of SL material without being restricted by its inherent pot life. - can also be used, or construction can be performed under conditions where the pot life is shortened, such as in the case of cement-based SL materials at low temperatures.

2) Small capacity equipment such as SL material soot slurry mixing tank and pouring pump can be used.

3) There is no need for the various work that was done in the conventional method, such as installing the wood before pouring the SL material slurry, removing the wood after the slurry has hardened, and repairing and leveling the remains of the removed material, so that it can be done at the time of construction. Significant labor savings are possible. Furthermore, the horizontal accuracy and flatness of the finished floor surface can be improved compared to conventional methods.

〔Example〕

Next, the present invention will be explained in detail using Examples and Comparative Examples.

Example-1, Comparative Example-1 and Reference Example-1゜Area 150
M (10m Xtsm) concrete slab first
As shown in the figure, the area is 50rrf (5m x 10m
) three medium compartments 1. The area was divided into sections II and II, and a cement-based skin slurry prepared as described below was poured into each section to an average thickness of 20 m5. The temperature at the time of pouring the slurry was 25°C.

- Cement-based SL material: "One Two Floor-C" (product name 1 Nitto Kagaku Kogyo ■).

・Sand: Sea sand (2m or less).

・Sand stop: 2.0° ・Water pressure (>70.24 for the total of SL material and sand.

[Flow value] Immediately after kneading: 192 m5. (Temperature: 25"C
).

1) Example-1゜As shown in Figure 1, middle section 1 (5m x 10m)
In order to divide the floor surface into five sections (■ to ■) of 5 m x 2 m each, iron angles (4 CI , I removed the temporary partitions ■ and ■.

SL material soot slurry pouring pump discharge amount is 0.25 rrf
/hr.

After pouring SL material soot slurry to a predetermined level in the obtained sections (2) and (2) and leveling it with a dragonfly, the temporary partition material at position a was removed and moved to position C.

At this point, the passing time of the SL material slurry after kneading was approximately 100 minutes, and the flow value of the slurry with skin was 171.
It was tm.

Next, SL material soot slurry was poured into the obtained section (2) to a predetermined level and leveled with a register mark, and then the temporary partition material at position zb was removed and moved to position d.

Subsequently, SL material soot slurry was poured into the obtained section (2) to a predetermined level and leveled with a dragonfly, and then the temporary partition material at position C was removed. Next, add S to the section ■ to a predetermined level.
After pouring the L material soot slurry and leveling it with a dragonfly, the temporary partition material at position d was removed.

At the time when the temporary partitions at locations c and d were removed, the elapsed time from immediately after the SL material slurry was mixed was approximately 50 minutes, and the flow value of the round material slurry was 185M.

The pouring conditions were good, and the construction was completed in one day without any repair work required.

After the SL material has hardened, measure the level at each point using a transint level at five locations per 1m square of the finished floor surface, each corner and the center, and calculate the ratio of the level difference to the distance between each two points. The horizontal level accuracy and flatness were calculated and the average value was used to display the horizontal level accuracy and flatness.

The horizontal level accuracy and flatness in this example are 1
/1000.

2) Comparative Example-1゜As shown in Figure 1, medium section II (5m Xtom
) is divided into small sections of 4 to 3 meters in length (■~
■) In order to partition the floor into
A, x 4.5 cIa x length 5 m) was installed as a sidewall, and the gap between the sidewall and the subfloor surface was sealed with cement paste.

18th, SL material slurry was poured into each of the three small sections (■ to ■) to a predetermined level, leveled with a dragonfly, and left to harden. The discharge amount of the pouring pump is 0.
The section with the largest pouring capacity at 25 rrr/hr (5
m x 4 m), the elapsed time from immediately after kneading the SL material soot at the end of casting was about 100 minutes, and the SL material soot flow value was 175 mo+.

On the second day, after the round timbers had hardened, the wood was removed and the remains of the removal were covered with mortar.

On the third day, after the repair material had hardened, sanding was performed to remove the level difference that had occurred in the repaired area.

Although the pouring conditions were good, repair work was required and it took three days to complete the construction.

The horizontal level accuracy and flatness of the finished floor surface after curing the round material is 1/30 when expressed using the method according to Example-1.
It was 0.

The horizontal level accuracy and flatness of the finished floor surface in each small section were almost the same as in Example-1, but the finished condition of the entire constructed floor surface including the repaired area where the wood was removed is inferior.

3) Reference Example-1° As shown in Fig. 1, the entire floor surface of a medium section m (5 m x 10 m) was treated as one section, and SL material slurry was poured continuously from the end. The discharge amount of the pouring pump is 0.3nf/h
r, but the SL material soot slurry at the end of pouring
The elapsed time after kneading was about 3 hours, and the SL material slurry
The flow value was 59+w. The fluidity of the round material slurry decreased and uneven leveling occurred.

Construction was completed in one day, but the condition of the pouring was poor and repair work was required. The horizontal level accuracy and flatness of the finished floor surface after curing were 1790 when expressed by the method according to Example-1.

Example-2, Comparative Example, Primer'-rl! on a concrete slab with a 2° area of 150 m (10 x 15 m). VA? l-200J (Showa Kobunshi ■) was applied, and temporary partition sections with different areas were created using temporary partition materials of various materials and shapes.

SL material soot slurry 20ffI shown in Table 1 was placed in the obtained compartment.
It was poured to a thickness of II and leveled using a register mark.

The temperature at the time of slurry pouring was 18° C., and the pump discharge rate was 13.3 f/min.

The horizontal level accuracy and flatness of the finished floor surface after curing were expressed in the same manner as in Example-1.

The results are shown in Table 2.

Example-3, Comparative Example- 3゜Area on a concrete slab of LOOrd (5 x 20m)? -rEVA M-200J (Showa Kobunshi ■) was applied, and a soft polyurethane packer (4 x 5 x 500 cm) was temporarily fixed with concrete nails as a temporary partition material to create temporary partition sections with different areas.

The SL material soot slurry shown in Table 3 was placed in the obtained section to a thickness of 20 treble and leveled using a dragonfly.

The temperature at the time of slurry pouring was 20°C, and the pump discharge rate was 20! /minute.

The horizontal level accuracy and flatness of the finished floor surface after curing were expressed in the same manner as in Example-1.

The results are shown in Table 4.

Table 1 ・Gypsum-based SL material: "One-Two Floor-No. 1".

(Product name, Nitto Chemical Industry ■).

・Sand: Sea sand (less than 2IIl+1).

・Sand stop: 1.0.

・Water ratio (relative to the total of SL material and sand) 70.25;
・ [Flow value] Immediately after kneading = 204I11. (Temperature: 1
8'C); Table 3 - SL material = α hemihydrate gypsum 100 parts Puftat (Ajinomoto@) 0.2 parts CM C0, 2 parts Mermen) F-10 (Showa Denko ■) 0.8 parts - Sand: sea sand・Sand stop: 1.0°・Water ratio (total of SL material and sand>! 0.23
;・ [Flow value] Immediately after kneading +210 kaku, (temperature = 20
℃); Table 2 Table 4 Note) *1... Time elapsed from immediately after kneading the SL material soot slurry.

[Brief explanation of drawings]

FIG. 1 is a reference diagram for explaining the SL material soot slurry casting procedure in the method of the present invention. Explanation of symbols; ■... Base floor surface for pouring SL material. +, n, m, ... middle section. all)+C+d+...Position where temporary partition material is installed. ■,■,■,■,■,...Temporary partition section. ■、■、■、・・・Small plot 1 Patent applicant Nitto Chemical Industry Co., Ltd. Procedures Amendment (Method) June 18, 1988 Commissioner of the Patent Office Black 1) Ming M. 1, Indication of the case Showa 1962 Patent Application No. 52171 2 Name of the invention Construction method for self-leveling flooring 3 Relationship with the person making the amendment Patent applicant No. 5-1 Marunouchi-chome, Chiyoda-ku, Tokyo 100, Showa 62
May 6, 1988 (May 26, 1986) 5. [Brief explanation of drawings] column of the list of amendments. 6. Contents of amendment (1) The column of "Brief explanation of drawings" of the specification shall be amended as follows. 1) On page 21, line 3, "Reference figure for explanation" is corrected to "Explanatory figure for illustration."

Claims (1)

[Claims] In a method for pouring a self-leveling flooring material, the subfloor surface is divided into two or more sections using a temporary partition material, and then a self-leveling flooring slurry is poured,
A method for constructing self-leveling flooring, characterized by successively repeating the following steps (1), (2), and (3) to continuously install the flooring. Step (1): Install a temporary partition material on the base floor surface and create a temporary partition section with an area such that the time required to cast the self-leveling flooring slurry to a predetermined level is within the pot life of the slurry. Create. Step (2): The slurry is placed on the inside and outside of the obtained temporary partition section with temporary partition materials in between. Step (3): Next, while the poured slurry maintains its fluidity, the temporary partition material is removed.