JP2000038566A - Concrete or mortar composition and set product thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a composition providing a set product which can protect against water leak even in the case of occurrence of cracks or crazes by compounding a surfactant with a highly water-absorbing polymer, a gelling agent therefor, and water. SOLUTION: There is provided a concrete or mortar composition prepared by mixing 1-30 wt.% water leak preventive with a concrete or a mortar. The water leak preventive is prepared by mixing 100 pts.wt. water with 0.01-10 pts.wt. surfactant, 0.01-10 pts.wt. highly water-absorbing polymer, 0.1-20 pts.wt. gelling agent therefor, and, optionally, 1-10 pts.wt. hydrophilic glue such as gelatin. The surfactant used is selected among anionic, cationic, nonionic, amphoteric, and like surfactants and is desirably, e.g. a biodegradable sodium fatty acid salt. The highly water-absorbing polymer is exemplified by polysodium (meth)acrylate, poly(meth)acrylamide, or alginic acid. The gelling agent used is exemplified by bentonite, montmorillonite, calcium acetate or aluminum sulfate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete or mortar composition containing a water leakage preventing agent having good water stopping performance and a cured product thereof.

[0002]

2. Description of the Related Art To stop water leakage from a roof, a floor or a wall, a sealing agent is applied and filled into a leaking point such as a hole or a crack or a gap which causes the leaking. The entire roof must be replaced, the waterproof sheet must be completely replaced, the walls must be spray-painted, and the tiles must be completely replaced. In many cases, it is extremely difficult to identify the infiltration point of the leaked water, so that simple repair simply by applying and filling a sealant is often not solved. In the case of rain leaks, the compensation period is often as long as 5 to 10 years, during which time the contractor, the contractor whose compensation has expired, and sometimes the owner, have to bear a large amount of expenses. Have been. In this regard, Tokuhei 7-966
72 and JP-A-5-140537 disclose a spray rain-preventing agent, which discloses a method of closing a crack that causes water leakage with a water-insoluble powder or silica sol dispersion.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a concrete or mortar composition which does not leak even if cracks or cracks occur.

[0004]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention. That is, the present invention relates to a concrete or mortar containing (1) (a) a surfactant, (b) a superabsorbent polymer, (c) a gelling agent for a superabsorbent polymer, and (d) a water leakage preventing agent containing water. A composition, (2) a cured product obtained by curing the concrete or mortar composition according to the above (1).

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The surfactant (component (a)) used in the present invention facilitates the introduction of the water leakage preventing component (hereinafter, simply referred to as the water leakage preventing component) in the water leakage preventing agent of the present invention to a leaking infiltration point. Surfactants may be of any type, anionic, cationic, nonionic, amphoteric, etc., specifically, fatty acid salts, phosphates, polyoxyethylene glycol, tetraalkyl ammonium salts, Examples thereof include an alkyl ether sulfate, an alpha olefin sulfonate, and a fatty acid alkanolamide, and these may be used alone or in combination of two or more. From the viewpoint of the environment, it is preferable to select one having good biodegradability.
Specific examples include fatty acid sodium, fatty acid potassium, sodium alkyl ether sulfate, sodium alpha-olefin sulfonate, fatty acid alkanolamide, alkylamine oxide and the like. The amount of the surfactant is usually 0.01 to 10 parts by weight, preferably 0.3 to 3 parts by weight, based on 100 parts by weight of water (component (d)).

The superabsorbent polymer used in the present invention ((b)
Component) reacts partially with the superabsorbent polymer gelling agent (component (c)) to form a water-insoluble gel, and the unreacted remainder becomes a gel binder, and when mixed into concrete or mortar, water leaks. After entering the gap of concrete or mortar causing intrusion, it blocks and
It works to prevent infiltration of water leakage. As the superabsorbent polymer used in the present invention, a substance that absorbs and swells in a short time and swells up to about several hundred times its own weight is used, and a non-crosslinked polymer is preferable. Specific examples of the superabsorbent polymer that can be used include alkali metal poly (meth) acrylate, sodium (meth) acrylate-vinyl alcohol copolymer (saponified methyl (meth) acrylate-vinyl acetate copolymer). Poly (meth) such as saponified poly (meth) acrylonitrile polymer, hydroxyethyl methacrylate polymer, poly (meth) acrylamide
Acrylic acid derivatives, alginic acid, sodium alginate, potassium alginate, alginic acid derivatives such as alginate propylene glycol ester, starch, starch derivatives such as sodium starch glycolate, potassium starch glycolate, sodium starch phosphate, potassium starch phosphate, methylcellulose And cellulose derivatives such as hydroxypropylcellulose, sodium carboxymethylcellulose and potassium carboxymethylcellulose. Preferred are sodium poly (meth) acrylate, poly (meth) acrylamide, alginic acid, sodium alginate, potassium alginate, propylene glycol alginate, starch, sodium starch glycolate, sodium starch phosphate, methylcellulose, hydroxypropylcellulose Or sodium carboxymethylcellulose. These superabsorbent polymers may be used alone or as a mixture. The amount of the superabsorbent polymer is water ((d) component) 1
The amount is usually 0.01 to 10 parts by weight, preferably 0.02 to 2 parts by weight based on 00 parts by weight.

Further, another hydrophilic paste may be mixed with the superabsorbent polymer. The hydrophilic sizing agent may be any of a natural sizing agent, a synthetic polymer sizing agent, and the like, but is preferably a synthetic polymer sizing agent that does not easily rot. Specific examples include gelatin, glue, and acrylic emulsions. When the hydrophilic paste is used, the amount of the hydrophilic paste is usually 1 to 10 parts by weight based on 100 parts by weight of water (component (d)).
The hydrophilic paste has a function of preventing the water leakage preventing agent from flowing out after entering the water leakage entry point.

As the gelling agent (c) for the superabsorbent polymer, silicate, water-soluble alkaline earth metal salt, alum, water-soluble aluminum salt, water-soluble iron salt, water-soluble manganese salt, water-soluble zinc salt or alkali Earth metal oxides and the like, silicates such as bentonite, montmorillonite, smectite, beaterite, nontronite, hectorite, laponite, saponite and other metal cations possessed by self and cations possessed by superabsorbent polymer It is a silicate mineral having an ion exchange capacity of, and water-soluble alkaline earth metal salts include calcium acetate, calcium chloride, calcium nitrate, magnesium acetate, magnesium chloride, magnesium nitrate, magnesium sulfate, and the like. Alum, iron alum, etc., as water-soluble aluminum salts. Is aluminum acetate, aluminum chloride, aluminum sulfate, and aluminum nitrate, etc., iron acetate as the water-soluble iron salts, iron chloride, iron sulfate, and iron nitrate, etc., as the water-soluble manganese salt of manganese acetate,
Manganese chloride, manganese sulfate and the like; water-soluble zinc salts include zinc acetate, zinc chloride, zinc nitrate and zinc sulfate; and alkaline earth metal oxides include magnesium oxide and calcium oxide. Preferred are bentonite, montmorillonite, smectite, magnesium acetate, calcium acetate, aluminum acetate, and aluminum sulfate. The superabsorbent polymer gelling agent serves to make the superabsorbent polymer a water-insoluble gel. For this reason, cracks and gaps that cause water leakage can be closed. Further, the clogged one is not dissolved again in water and does not flow away. The amount of the gelling agent of the superabsorbent polymer is usually 0.1 to 20 parts by weight based on 100 parts by weight of water (component (d)). The weight of the superabsorbent polymer other than the silicate mineral is preferably equal to or less than the weight of the superabsorbent polymer.

The water leakage preventive used in the present invention can be obtained by uniformly mixing the above components at a predetermined ratio. In this case, the order of mixing the components is arbitrary. The concrete or mortar composition of the present invention can be obtained by kneading the thus obtained water leakage preventive agent into ordinary concrete or mortar. The mixing ratio of the water leakage inhibitor to concrete or mortar is usually 1 to 30% by weight.
(Internally divided). Further, the mixing ratio may be adjusted so as not to impair the fluidity of the concrete or mortar used.

[0010] When repairing a leak location with the concrete or mortar composition of the present invention, the leaked portion is closed with the concrete or mortar composition of the present invention, or when the leak location is unknown, a roof that leaks. The floor or wall may be uniformly coated on the entire surface with the concrete or mortar composition of the present invention. Further, the cured product of the present invention in which the concrete or mortar composition of the present invention is used for the roof, floor or wall itself does not have a risk of water leakage even if cracks or cracks enter after construction.

[0011]

Next, the present invention will be described in more detail by way of examples.

Example 1 (1) Surfactant: 10 g of sodium stearate
(Reagent, manufactured by Wako Pure Chemical Industries, Ltd.) (2) Superabsorbent polymer: sodium polyacrylate
5 g (trade name: Panakayak F, manufactured by Nippon Kayaku Co., Ltd.) (3) Gelling agent for superabsorbent polymer: bentonite 3
0 g (trade name: Super Ben, manufactured by Kunimine Industries Co., Ltd.) (4) Water 1000 g These were sufficiently mixed to obtain a viscous liquid (water leakage inhibitor).

Separately, a commercially available sand-containing cement (trade name:
Aso Katei Cement, Aso Cement Co., Ltd.) 3.0
Kg was prepared, and 700 g of the above water leakage inhibitor was added thereto and kneaded well to obtain a mortar composition of the present invention. Next, this was put into a mold and solidified into the shape shown in FIG. 1 to obtain a cured product of the present invention. After this concrete container was split into two (Fig. 2), it was re-assembled and reinforced with wire, and water was poured into the container as shown in Fig. 3, and water immediately leaked from the joint, but it took about 5 minutes. Water leakage stopped. Water was poured until it was full, but did not leak. After standing for 30 minutes, water was drained from the container, and the container was dried at 60 ° C. for 3 days. After the vessel had cooled to room temperature, it was poured again with water, but no water leaked out of the seams. Also,
This was left standing for three days with water, but no water leaked from the joint.

Example 2 (1) Surfactant: 5 g of sodium stearate (reagent, manufactured by Wako Pure Chemical Industries, Ltd.): 5 g of sodium lauryl sulfate (trade name: Emal 10 powder, manufactured by Kao Corporation) ( 2) Superabsorbent polymer: 20 g of sodium carboxymethylcellulose (reagent, manufactured by Wako Pure Chemical Industries, Ltd.) (3) Gelling agent of superabsorbent polymer: 40 g of smectite (trade name: Synthetic smectite SWF, Corp Chemical Co., Ltd.) (4) Water 1000 g These were sufficiently mixed to obtain a viscous liquid (water leakage inhibitor).

Separately, a commercially available sand-containing cement (trade name:
Aso Katei Cement, Aso Cement Co., Ltd.) 3.0
Kg was prepared, and 700 g of the above water leakage inhibitor was added thereto and kneaded well to obtain a mortar composition of the present invention. Next, this was put into a mold and solidified into the shape shown in FIG. 1 to obtain a cured product of the present invention. After this concrete container was split into two (Fig. 2), it was re-assembled and reinforced with wire, and water was poured into the container as shown in Fig. 3, and water immediately leaked from the joint, but it took about 5 minutes. The leak stopped. Water was poured until it was full, but did not leak. After standing for 30 minutes, water was drained from the container, and the container was dried at 60 ° C. for 3 days. After the vessel had cooled to room temperature, it was poured again with water, but no water leaked out of the seams. Also,
This was left standing for three days with water, but no water leaked from the joint.

Example 3 (1) Surfactant: 20 g of sodium lauryl sulfate
(Product name: Emal 10 powder, manufactured by Kao Corporation) (2) Superabsorbent polymer: 10 g of sodium carboxymethylcellulose (reagent, manufactured by Wako Pure Chemical Industries, Ltd.) (3) Gelling agent of superabsorbent polymer: aluminum sulfate 3 g (reagent, manufactured by Wako Pure Chemical Industries, Ltd.) (4) Water 1000 g These were sufficiently mixed to obtain a viscous liquid (water leakage inhibitor).

Separately, a commercially available cement containing sand (trade name:
Aso Katei Cement, Aso Cement Co., Ltd.) 3.0
Kg was prepared, and 700 g of the above water leakage inhibitor was added thereto and kneaded well to obtain a mortar composition of the present invention. Next, this was put into a mold and solidified into the shape shown in FIG. 1 to obtain a cured product of the present invention. After this concrete container was split into two (Fig. 2), it was re-assembled and reinforced with wire, and water was poured into the container in the state of Fig. 3, and water immediately leaked from the joint, but it took about 10 minutes. The leak stopped. Water was poured until it was full, but did not leak. After leaving for 30 minutes,
The container was drained and the container was dried at 60 ° C. for 3 days.
After the vessel had cooled to room temperature, it was poured again with water, but no water leaked out of the seams. Further, this was left standing for 3 days with water, but no water leaked from the joint.

Example 4 (1) Surfactant: 20 g of sodium oleate (reagent, manufactured by Wako Pure Chemical Industries, Ltd.) (2) Superabsorbent polymer: 10 g of sodium carboxymethyl cellulose (reagent, manufactured by Wako Pure Chemical Industries, Ltd.) (3) Gelling agent for superabsorbent polymer: bentonite 5
0 g (trade name, Super Ben, manufactured by Kunimine Industries Co., Ltd.) (4) Water 1000 g These were sufficiently mixed to obtain a viscous liquid (water leakage inhibitor).

Separately, a commercially available cement containing sand (trade name:
Aso Katei Cement, Aso Cement Co., Ltd.) 3.0
Kg was prepared, and 700 g of the above-mentioned water leakage preventing agent was added thereto, followed by well kneading to obtain a mortar composition of the present invention. Next, this was put into a mold and solidified into the shape shown in FIG. 1 to obtain a cured product of the present invention. After this concrete container was split into two (Fig. 2), it was re-assembled and reinforced with wire, and water was poured into the container in the state of Fig. 3, and water immediately leaked from the joint, but it took about 10 minutes. The leak stopped. Water was poured until it was full, but did not leak. After standing for 30 minutes, water was drained from the container, and the container was dried at 60 ° C. for 3 days. After the vessel had cooled to room temperature, it was poured again with water, but no water leaked out of the seams. Further, this was left standing for 3 days with water, but no water leaked from the joint.

[0020]

According to the present invention, the mortar or concrete composition has an excellent ability to block water leaks, and the walls, roofs, floors and the like obtained by curing the mortar or concrete are capable of penetrating water through cracks generated in them. By utilizing the water, the cracked portion is quickly filled with the water leakage preventive agent, so that it is possible to prevent infiltration of the intruded water.

[Brief description of the drawings]

Fig. 1 Concrete container

FIG. 2 is a concrete container of FIG. 1 divided into two parts.

FIG. 3 is a view obtained by restoring the two-part container obtained in FIG. 2;

[Explanation of symbols]

 1; concrete container 2; seam 3; wire

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2E109 AA07 AB01 AB04 CA02 CA06 CB01 FA11 4H017 AA04 AA24 AA28 AA31 AB01 AB17 AC04 AC05 AD05 AD06 AE03

Claims (2)

[Claims] 1. A concrete or mortar composition containing (a) a surfactant, (b) a superabsorbent polymer, (c) a gelling agent for a superabsorbent polymer, and (d) a water leakage preventing agent containing water. . 2. A cured product obtained by curing the concrete or mortar composition according to claim 1.