JPH04260675A - Technique for preventing corrosive metal material in inorganic cured product from rust - Google Patents

Abstract

PURPOSE:To protect a corrosive metal material in an inorganic cured article and improve durability by attaching a mortar composition obtained by blending a porous aggregate in which a rust-proofing agent and alkali metal salt is enclosed to the surface of an inorganic cured article. CONSTITUTION:A nitrous acid salt such as calcium nitrite, borate such as peroxyethylenebisgrecerol borate and aqueous solution of rust preventive such as organic carboxylic acid salt based rust preventive are added to a porous aggregate such as crushed granules of natural zeolite or granules of allophane to absorb water into the porous aggregate. Then the aggregate is dried to afford an aggregate in which rust proofing agent is built, which is mixed with other aggregate generally used and then blended with a mortar composition. Then the mortar composition is applied to the surface of an inorganic cured article in which corrosive metal such as a steel material is embedded and the surface is cured to provide the objective inorganic cured article. The cured article exhibits rust-proofing effect over the long period, because uniformly dispersed and blended rust preventive is gradually dissolved in the cured article little by little.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a method for rust-preventing corrosive metal materials in inorganic hardened materials, which can protect steel materials such as building blocks and lath mortar and improve durability during repair or renovation. Regarding. More specifically, mortar compositions containing aggregates containing rust preventive agents and alkali metal salts can be used on surfaces or repaired areas such as concrete in which corrosive metal materials are embedded, lightweight aerated concrete (ALC), and lath mortar. An inorganic cured product that can be applied to the aggregate so that the rust preventive agent and alkali metal salt in the aggregate can prevent corrosive metal materials from rusting and prevent the deterioration of the inorganic cured product. The purpose is to provide a construction method for rust-proofing corrosive metal materials inside.

0002

[Prior Art] When a corrosive metal material such as reinforced concrete is embedded with an inorganic hardened material, when rust occurs in the corrosive metal material due to the intrusion of rainwater, the volume expansion causes cracks to occur in the inorganic hardened material. Crush it. especially,
When a high concentration of chlorine ions are mixed in the inorganic cured product, the corrosive metal material corrodes relatively easily. Conventionally, as methods for rust-preventing corrosive metal materials in inorganic cured products as described above, the following methods have been disclosed, for example. ■Unexamined Japanese Patent Publication No. 55-78764,
A method is described in which a solution of a water-soluble silicate compound is applied to the surface of reinforced concrete or an inorganic material to impregnate it, and then a cement paste is coated. ■Unexamined Japanese Patent Application 1986-2
Publication No. 04683 describes a method of coating and impregnating the surface of an inorganic material containing a steel material with an aqueous solution of an inorganic salt having a rust-preventing effect, and then a method of overcoating with a cement-based composition. ■Unexamined Japanese Patent Publication No. 60-231478 discloses a method of applying an aqueous solution of a water-soluble silicate to the surface of an inorganic material containing a steel material, and then applying an aqueous solution of an inorganic salt having a rust-preventing effect to the surface, and then applying an aqueous solution of a water-soluble silicate. The document describes a method of then overcoating with a cement-based composition. ■Japanese Unexamined Patent Publication No. 62-74090 discloses a method of applying and impregnating the surface of an inorganic material containing steel with an aqueous solution of inorganic salts having a rust-preventing effect, and then coating the surface with a silicone-based and/or silane-based primer. , and a method for applying a top coat of paint afterwards. ■Tokuho 1-35
No. 788 describes a rust-preventing mortar and a rust-preventing paint mixed with lithium silicate. ■Unexamined Publication Hei 1-2
Publication No. 01088 describes a method in which the surface of an inorganic material containing a metal material is coated and impregnated with an aqueous solution of an inorganic salt and/or silicate compound, and then a treatment agent containing an organic titanate as a main component is applied. ing. ■Unexamined Patent Publication 1986-20
Publication No. 1444 states that the surface of a building has a glass transition point of 0.
A method for forming a coating film containing a synthetic resin at a temperature of 0.degree. C. or less is described. ■Japanese Patent Application Laid-open No. 158880/1988 states that
It describes a method of applying and impregnating reinforced concrete with a rust preventive agent whose main component is polyhydric alcohol-based nitroester, then applying an aqueous lithium silicate solution, and then applying a silicone-based penetrating water repellent. . ■Unexamined Patent Publication Hei 1-29
Publication No. 8185 describes a method of coating and impregnating an aqueous solution of lithium silicate on the surface of concrete containing steel materials, then coating and impregnating an aqueous solution of calcium nitrite, and then further applying a cement-based composition. has been done.

0003

[Problem to be Solved by the Invention] However, among the above-mentioned rust prevention methods, the methods of
The surface of each inorganic material is coated (impregnated) with either or both of an aqueous solution of a rust preventive agent such as calcium nitrite, an aqueous solution of an alkali metal salt such as lithium silicate, or a cement-based composition is then applied. This type of method results in uneven application amount and uneven penetration amount, resulting in uneven chemical diffusion effect and a decline in rust prevention effect over time. . Also,
Since the number of processing steps is large, the construction process is complicated and the construction time is also long. Furthermore, since the repair mortar composition has a low moisture permeability, if condensation water or the like occurs within the inorganic material, the moisture will remain inside the inorganic material without dissipating to the outside, and the rust prevention effect will be halved. In particular, ■, ■, and ■ are overcoated with silicone-based and/or silane-based primers, processing agents mainly composed of organic titanates, silicone-based penetrating water repellents, and paints, so the moisture inside the inorganic materials described above is Since it is difficult to dissipate to the outside, the rust prevention effect decreases significantly over time.

[0004] In addition, the above-mentioned method (1) imparts gas barrier properties to the surface of the building by forming a synthetic resin coating film, and similarly to the above-mentioned methods (2) to (2) and (2) to (3), Since the moisture contained in the material is difficult to dissipate, the rust prevention effect is not sufficient.

[0005]

[Means for Solving the Problems] The present invention has been proposed in view of the above, and includes a rust preventive agent built into porous aggregate on the surface of an inorganic hardened material in which a corrosive metal material is embedded. The present invention relates to a method for rust-preventing corrosive metal materials in an inorganic cured product, which is characterized by applying a mortar composition containing aggregates containing: Furthermore, in the present invention, an aggregate in which an alkali metal salt is incorporated in the porous aggregate may be used in combination with the above-mentioned aggregate. It is also possible to apply a mortar composition containing an aggregate containing .

[0006] The porous aggregate used in the present invention described above is
The material and properties are not particularly limited as long as it has micropores and water absorption performance. Therefore, not only inorganic aggregates but also organic foamed aggregates such as ethylene-vinyl acetate foamed aggregates may be used as the porous aggregate of the present invention. However, in particular, by using porous aggregates having the particle size, air-dried bulk density, and water absorption rate shown below, it is possible to improve the workability of troweling the inorganic cured product blended with the porous aggregate, and to obtain It is possible to reduce the water permeability of the inorganic cured (molded) product and to improve the water permeability. That is, the particle size is 5 to 0.06 mm, more preferably 2.0 mm, taking into account the troweling work.
It is sufficient to use a material having a diameter of 5 to 0.1 mm. Also,
The air-dried bulk specific gravity may be 1.5 to 0.1. When it is 1.5 or more, the impregnating and adsorbing ability of the rust preventive agent decreases, and the moisture permeability of the obtained inorganic cured product decreases. Also,
If it is less than 0.1, the resulting inorganic cured product will have lower strength and higher water permeability and water absorption, which is not preferred. Furthermore, the water absorption rate may be 500 to 15 wt%. If it exceeds 500 wt%, the impregnating and adsorbing ability for rust preventive agents and alkali metal salts will increase, but the strength of the obtained mortar will decrease and water permeability and water absorption will increase, which is not preferable. Moreover, when it is less than 15 wt%, the impregnating and adsorbing ability of the rust inhibitor and alkali metal salt becomes low, and the moisture permeability of the obtained inorganic cured product decreases. Porous aggregates with the above-mentioned air-dried bulk specific gravity and water absorption rate include natural zeolite (mordenite, clinoptilolite, xM(2/n)O.Al2
crushed granules of O3 ・ySiO2 ・zH2 O),
Granules, granulated pellets, granulated granules, allophane (A
llophane, natural silica alumina gel, Al2
O3 ・mSiO2 ・nH2 O+Al(OH)3
) granular products, granular products, diatomaceous earth granulated and fired particles, or tuff-based natural glass fired products, rhyolite-based natural glass pumice,
Examples include crushed calcium silicate particles, foamed glass particles, crushed firebrick particles, and crushed ALC particles.

[0007] Furthermore, the rust preventive used in the present invention is
Those specified in A 6205 "Rust preventive agent for reinforced concrete" can be used, such as nitrites such as calcium nitrite and sodium nitrite, pyroxyethylene bisglycerol porate, and polyoxyethylene bisglycerol. Examples include boric acid esters such as porate and oleate, organic carboxylate salts, and the like.

In order to incorporate the above-mentioned rust preventive agent into the above-mentioned porous aggregate, an aqueous solution of the rust preventive agent is added to the porous aggregate to absorb water, and then dried to remove water. For example, the porous aggregate may be impregnated with an aqueous solution of a rust preventive agent to absorb sufficient water, and then air-dried.

[0009] The aggregate thus prepared can be mixed with other generally used aggregates as appropriate and incorporated into a mortar composition. In the inorganic hardened (molded) product obtained by curing this mortar composition, the rust preventive agent is uniformly dispersed and mixed, and the rust preventive agent gradually dissolves in minute amounts, maintaining the rust preventive effect over a long period of time. Demonstrate. Therefore, when the mortar composition described above is applied to the surface of an existing inorganic hardened (molded) object, the rust preventive agent will diffuse and permeate into the interior of the existing inorganic hardened (molded) object, preventing its deterioration. It can be prevented.

[0010] Furthermore, the surface of the aggregate described above may be coated with cement and then hardened and granulated. As the above-mentioned cement, for example, Portland cement, Portland mixed cement, white cement, jet cement, etc. can be used. in this case,
After adding an aqueous solution of rust preventive to the porous aggregate and allowing it to absorb water,
It is sufficient to coat the surface of the porous aggregate with cement without drying, and the cement hardens with moisture on the surface of the porous aggregate by curing. Since the surface of the aggregate obtained in this way is covered with cement, the solubility of the built-in rust preventive agent is further delayed, and the rust preventive effect of the mortar composition containing this agent is longer. .

[0011] Furthermore, instead of the above-mentioned rust preventive agent, for example, an aggregate in which an alkali metal salt such as lithium silicate or lithium nitrite is incorporated in the porous aggregate may be incorporated into the mortar composition. good. Aggregates in which alkali metal salts are incorporated into porous aggregates can be produced by adding an aqueous solution of alkali metal salts to porous aggregates, absorbing water, and then drying to evaporate the water. can. Or,
After an aqueous solution of an alkali metal salt is added to the porous aggregate to absorb water, cement may be coated on the surface of the porous aggregate without drying, and the aggregate may be hardened and granulated.

[0012] When such aggregate containing an alkali metal salt is blended into a mortar composition, the alkali metal salt gradually dissolves in small amounts, making the inorganic cured product alkaline over a long period of time, and preventing rust. be able to. Therefore, when the mortar composition described above is applied to the surface of an existing inorganic cured (molded) object, the alkali metal salt will diffuse and permeate into the interior of the existing inorganic cured (molded) object. The rate of decomposition can be delayed.

[0013] The present invention uses a mortar composition containing aggregates with a built-in rust preventive agent or aggregates with a built-in rust preventive agent and whose surface is coated with cement. It is applied to the surface of the embedded inorganic cured material, but it also includes aggregates that contain alkali metal salts, or aggregates that contain alkali metal salts and whose surface is covered with cement. Alternatively, the inorganic cured product can be more effectively prevented from deteriorating.

[0014] As mentioned above, the present invention provides a rust preventive agent,
A mortar composition containing an aggregate containing an alkali metal salt may be applied directly to the surface of the inorganic cured material, but
Cement paste may be applied as a primer material. As mentioned above, undercoating with cement paste improves the adhesion of the mortar composition in the present invention.
The high alkalinity of cement paste can also improve the rust prevention effect of reinforcing bars. Further, in this case, adhesion can be further stabilized by mixing a cement-mixing polymer dispersion into the cement paste. As described above, a polymer dispersion for mixing with cement may be used to stabilize adhesion as long as it does not reduce the moisture permeability of the mortar composition of the present invention.

[0015] As the above-mentioned cement paste, Portland cement, Portland-based mixed cement, etc. can be used, and an appropriate amount of water is added to this and kneaded into a paste. A sticky agent and fine aggregate may be mixed. On the other hand, the amount of the polymer dispersion for cement mixing cannot be limited depending on the type of dispersion, but it should be used at a solid content of 0.5 to 30% based on the powder. The polymer dispersion used for mixing with cement is not particularly limited as long as it does not mix into cement and causes abnormalities and has a sufficient starting time, but examples include acrylic resin emulsion, ethylene/vinyl acetate copolymer Emulsions, multicomponent synthetic resin emulsions consisting of ethylene, vinyl acetate, styrene, acrylic esters, SBR latex, epoxy resin emulsions, etc. are suitable.

[0016] In particular, for parts made of corrosive metal materials and structures with high chloride ion concentration, JIS
The rust prevention effect is further improved by mixing a rust preventive agent specified in A6205.

[0017] The mortar composition of the present invention contains aggregate containing a rust preventive agent and an alkali metal salt as described above, but this rust preventive agent and alkali metal salt are contained in trace amounts. It gradually dissolves and diffuses, and the rate of diffusion is accelerated by water from the surface, and some of it may be washed away by the water. Therefore, if a cement-based composition is applied as a top coat material after applying the mortar composition of the present invention, the diffusion and outflow of the above-mentioned rust preventive agent and alkali metal salt will be suppressed, and the composition will last for a long period of time. The effect can be continued.

The above-mentioned cement composition is a mixture of Portland cement, white cement, Portland mixed cement, etc., with fine aggregate, inorganic admixtures, dispersants, thickeners, etc., and water is added at the time of use. This is something that I have carefully refined. In this case, in order to improve the adhesion and stabilize the cement-based composition, a polymer dispersion for admixing with cement may be mixed to an extent that does not impair moisture permeability. The above-mentioned polymer dispersions for mixing with cement include acrylic resin emulsions, ethylene/vinyl acetate copolymer emulsions, ethylene, vinyl acetate, styrene,
Suitable examples include multicomponent synthetic resin emulsions made of acrylic acid esters, SBR latex, and epoxy resin emulsions.

[0019] In addition, the above-mentioned cement paste for the top coat also contains the following:
The rust prevention effect is further improved by mixing a rust preventive agent.

[0020]

[Examples] Examples of the present invention are shown below. First, aggregates A to K were produced as follows. The porous aggregates shown in Table 1 below were used.

[0021]

[Table 1]

[0022] Aggregate A: Add 6.9 g of Sabinon P (rust preventive agent, manufactured by Chrest Chemical Co., Ltd.) to 120 cc of tap water and stir thoroughly to dissolve. Next, 58 g of zeolite 1014 (porous aggregate),
After adding 229 g of zeolite 1424 (porous aggregate) and stirring thoroughly to absorb water, the mixture is placed in a dryer at 50° C. and dried.

Aggregate B: Add 13.8 g of Sabinon P (rust preventive agent) to 120 cc of tap water and stir thoroughly to dissolve. Next, zeolite 1
After adding 58 g of Zeolite 014 (porous aggregate) and 229 g of Zeolite 1424 (porous aggregate) and stirring thoroughly to absorb water, the mixture was placed in a dryer at 50° C. and dried.

Aggregate C: Add 6.9 g of Sabinon P (rust preventive agent) to 120 cc of tap water and stir thoroughly to dissolve. Next, Zeolite 10
Add 58 g of 14 (porous aggregate) and 229 g of zeolite 1424 (porous aggregate) and stir thoroughly to absorb water, then add 140 g of ordinary Portland cement and stir,
Adhesive granulation. After curing this at 20°C and 65% for 48 hours, it was placed in a dryer at 50°C and dried.

Aggregate D: Add 13.8 g of Sabinon P (rust preventive agent) to 120 cc of tap water and stir thoroughly to dissolve. Next, zeolite 1
After adding 58 g of Zeolite 1424 (porous aggregate) and 229 g of Zeolite 1424 (porous aggregate) and thoroughly stirring to absorb water, 140 g of ordinary Portland cement was added and stirred to adhere and granulate. After curing this at 20°C and 65% for 48 hours, it was placed in a dryer at 50°C and dried.

Aggregate E: Add 6.9 g of Sabinon P (rust preventive agent) to 200 cc of tap water and stir thoroughly to dissolve. Next, 188.2 g of Isolite No. 1 (porous aggregate) and 168 g of Isolite No. 2 (porous aggregate) were added and thoroughly stirred to absorb water.
Add 200 g of ordinary Portland cement and stir to adhere and granulate. After curing this at 20°C and 65% for 48 hours, it was placed in a dryer at 50°C and dried.

Aggregate F: Add 13.8 g of Sabinon P (rust preventive agent) to 200 cc of tap water and stir thoroughly to dissolve. Next, isolite 1
After adding 188.2 g of No. (porous aggregate) and 168 g of Isolite No. 2 (porous aggregate) and stirring thoroughly to absorb water, 200 g of ordinary Portland cement was added and stirred.
Adhesive granulation. After curing this at 20°C and 65% for 48 hours, it was placed in a dryer at 50°C and dried.

Aggregate G: Add 20.7 g of Sabinon P (rust preventive agent) to 200 cc of tap water and stir thoroughly to dissolve. Next, isolite 1
After adding 188.2 g of No. (porous aggregate) and 168 g of Isolite No. 2 (porous aggregate) and stirring thoroughly to absorb water, 200 g of ordinary Portland cement was added and stirred.
Adhesive granulation. After curing this at 20°C and 65% for 48 hours, it was placed in a dryer at 50°C and dried.

Aggregate H: Add 110 g of LINI-25 (lithium nitrite aqueous solution, manufactured by Nissan Chemical Industries, Ltd.) to 100 cc of tap water and stir thoroughly to dissolve. Next, 188.2 g of Isolite No. 1 (porous aggregate), 1 g of Isolite No. 2 (porous aggregate)
After adding 68 g and thoroughly stirring to absorb water, the mixture is placed in a dryer at 50°C and dried.

Aggregate I: Add 110 g of LINI-25 (lithium nitrite aqueous solution) to 100 cc of tap water and stir thoroughly to dissolve. Next, 188.2 g of Isolite No. 1 (porous aggregate) and 168 g of Isolite No. 2 (porous aggregate) were added and stirred thoroughly to absorb water, followed by 200 g of ordinary Portland cement.
Add and stir to adhere and granulate. This at 20℃, 65%
After curing for 48 hours, place in a dryer at 50°C to dry.

Aggregate J: Add 110 g of ZOL-510 (lithium silicate aqueous solution, manufactured by Nissan Chemical Industries, Ltd.) to 100 cc of tap water and stir thoroughly to dissolve. Next, 188.2 g of Isolite No. 1 (porous aggregate), 1 g of Isolite No. 2 (porous aggregate)
After adding 68 g and thoroughly stirring to absorb water, the mixture is placed in a dryer at 50°C and dried.

Aggregate K: Add 110 g of ZOL-510 (lithium silicate aqueous solution) to 100 cc of tap water and stir thoroughly to dissolve. Next, 188.2 g of Isolite No. 1 (porous aggregate) and 168 g of Isolite No. 2 (porous aggregate) were added and stirred thoroughly to absorb water, followed by 200 g of ordinary Portland cement.
Add and stir to adhere and granulate. This at 20℃, 65%
After curing for 48 hours, place in a dryer at 50°C to dry.

Mixing Examples 1 to 12 Using the above-mentioned aggregates A to K, repair/renovation mortar compositions having the blending compositions shown in Tables 2 and 3 were mixed and prepared.

Comparative Examples 1 to 5 Repair/renovation mortar compositions having the compositions shown in Tables 2 and 3 were mixed and prepared without using aggregates A to K.

[0035]

[Table 2]

[0036]

[Table 3]

Specimen 1: The repair/renovation mortar compositions of the above-mentioned blending examples 1 to 12 and comparative examples 1 to 5 were prepared according to the Architectural Institute of Japan standard JASS 15M.
-102 and kneaded with the amount of water shown in Tables 2 and 3,
Place in a 4 x 4 x 16 cm mold and shape. After curing in humid air for 48 hours at a temperature of 20° C. and a humidity of 80% or more, it was removed from the mold and cured for up to 2 weeks in a constant temperature and humidity room at a temperature of 20° C. and a humidity of 65%.

Specimen 2: Specimen 2 was prepared under the same conditions as Specimen 1 described above except that it was molded to a size of 7×7×2 cm.

Specimen 3: The front and back surfaces (7 x 7 cm) of the specimen 2 described above were coated with a cement composition, and cured in a constant temperature and humidity room at a temperature of 20° C. and a humidity of 65% for up to 2 weeks. This was designated as specimen 3. Two days before the end of curing, the sides were sealed with epoxy resin paint. The above cement composition is made by mixing 25 kg of Fujilite #10 (manufactured by Fujikawa Kenzai Kogyo Co., Ltd.), 2.5 kg of polymer dispersion for mixing with acrylic cement (solid content 60%), and water into a paste. I used what I had prepared.

Specimen 4: Specimen 4 was prepared under the same conditions as Specimen 3 described above, except that a cement composition containing a rust preventive agent was applied as an overcoat. The above-mentioned cement composition containing rust preventive agent contains 25 kg of Fujilite #10 (manufactured by Fujikawa Kenzai Kogyo Co., Ltd.), 250 g of Sabinon P (rust preventive agent), and a polymer dispersion (solid content) for mixing with acrylic cement. 60%) and water were kneaded into a paste.

Test 1: Rust generation test After measuring the weight of the cured specimen, the temperature was 50°C.
The specimens were placed in a Franchi machine with a humidity of 90% or higher, and the occurrence of rust was observed. Items with no rust at all ◎ Items with almost no rust ■ Items with a slight amount of rust △ Items with a significant amount of rust × Items with significant rust ××
(n=3), and the results are shown in Tables 4-6. As a comparative condition, the specimen was placed in a sealed polystyrene container and the rust formation was similarly observed in a constant temperature and humidity chamber at 20° C. and 65%.

Test 2: Measurement of moisture absorption weight In Test 1 described above, the change in weight (g) of the specimen was measured (n=3) at the same time as the state of rust formation was observed, and the results are shown in Tables 4 to 6. .

Test 3: Measurement of bending strength After completing each of the above tests 1 and 2, the bending strength (kg
/cm2) was measured (n=3) and the results are shown in Tables 4 and 5. Test machine: Shimadzu Autograph AG5000C crosshead speed 0.5mm/min

Test 4: Measurement of the area of the neutralized portion After completing each of the above-mentioned tests 1, 2, and 3, a 1% solution of phenolphthalein was sprayed on the fractured cross section, and the area ratio of the neutralized portion was determined. (%) was measured (n=3) and the results are shown in Tables 4 and 5.

[0045]

[Table 4]

[0046]

[Table 5]

[0047]

[Table 6]

[0048]

[Effects of the Invention] As explained above, the method of rust-preventing corrosive metal materials in inorganic cured products of the present invention uses rust preventive agents and alkali to repair or repair parts of existing inorganic cured (molded) products. By applying a mortar composition containing metal salts, the rust preventive agent and alkali metal salts can be diffused into the interior of the mortar composition.
This existing inorganic hardening (
(molded) products can be prevented from deteriorating. In other words, the method of the present invention can prevent deterioration of inorganic cured materials for an extremely long period of time, compared to a method in which a rust preventive agent and an alkali metal salt are simply mixed into a mortar composition and applied. can. Furthermore, by applying a mortar composition containing aggregates containing a rust preventive agent and an alkali metal salt and whose surface is coated with cement, the above-mentioned rust preventive effect can be further prolonged. Therefore, the construction method of the present invention can particularly protect the building frame and lath mortar steel materials, etc., and improve their durability during repair or renovation. In addition, applying a primer coat of cement paste before applying the mortar composition improves the adhesion of the mortar composition.
The high alkalinity of cement paste can also improve the rust prevention effect of reinforcing bars. Furthermore, if a cement-based composition is applied after applying the mortar composition, the diffusion and outflow of the rust preventive agent and alkali metal salt in the mortar composition will be suppressed, and the effect will continue for a long period of time. can be done. In addition, the construction method of the present invention can be applied to both new construction and repair or renovation, and the specific work is no different from normal repair or renovation work, so it has extremely high practical value. be.

Claims (16)

[Claims] Claim 1: Applying a mortar composition comprising porous aggregate containing a built-in rust preventive agent to the surface of an inorganic cured product in which a corrosive metal material is embedded. A method of rust-preventing corrosive metal materials in inorganic cured materials. [Claim 2] The surface of the inorganic hardened material in which the corrosive metal material is embedded is mixed with aggregate in which a rust preventive agent is incorporated in the porous aggregate and the surface thereof is coated with cement. A method for rust-preventing corrosive metal materials in inorganic cured materials, characterized by applying a mortar composition. 3. Aggregate in which a rust preventive agent is built into the porous aggregate and the surface thereof is coated with cement, and porous bone on the surface of the inorganic hardened material in which the corrosive metal material is embedded. A method for rustproofing corrosive metal materials in an inorganic cured material, characterized by applying a mortar composition made by blending the material with aggregate containing an alkali metal salt. [Claim 4] The surface of the inorganic hardened material in which the corrosive metal material is embedded is composed of porous aggregate in which a rust preventive agent is incorporated and the surface thereof is coated with cement, and porous bone. A corrosive metal material in an inorganic cured material is coated with a mortar composition comprising an aggregate containing an alkali metal salt and whose surface is coated with cement. Rust prevention method. [Claim 5] After applying a mortar composition comprising porous aggregate containing aggregate containing a rust preventive agent to the surface of the inorganic cured product in which the corrosive metal material is embedded. ,
A method for rust-preventing corrosive metal materials in an inorganic cured material, which comprises applying a cement-based composition or a cement-based composition mixed with a rust preventive agent. [Claim 6] The surface of the inorganic hardened material in which the corrosive metal material is embedded is mixed with aggregate in which a rust preventive agent is incorporated in the porous aggregate and the surface thereof is coated with cement. A method for rust-preventing corrosive metal materials in an inorganic cured material, which comprises applying a mortar composition and then applying a cement-based composition or a cement-based composition mixed with a rust preventive agent. [Claim 7] The surface of the inorganic hardened material in which the corrosive metal material is embedded is composed of porous aggregate in which a rust preventive agent is incorporated and the surface thereof is coated with cement, and porous bone. It is characterized by applying a mortar composition made by blending an aggregate with an alkali metal salt built into the material, and then applying a cement-based composition or a cement-based composition mixed with a rust preventive agent. A method of rust-preventing corrosive metal materials in inorganic cured materials. [Claim 8] The surface of the inorganic cured material in which the corrosive metal material is embedded is composed of porous aggregate containing a rust preventive agent and whose surface is coated with cement, and porous bone. Cement mixed with a cementitious composition or a rust preventive agent after applying a mortar composition made of aggregate that contains alkali metal salts and whose surface is coated with cement. A method for rust-preventing corrosive metal materials in inorganic cured materials, which comprises applying a system composition. 9. A mortar composition in which a cement paste is applied to the surface of an inorganic cured material in which a corrosive metal material is embedded, and then an aggregate containing a rust preventive agent is mixed into the porous aggregate. A method of rust-preventing corrosive metal materials in inorganic cured materials, which is characterized by coating the material. 10. After applying cement paste to the surface of the inorganic hardened material in which the corrosive metal material is embedded, a rust preventive agent is incorporated into the porous aggregate, and the surface is covered with cement. A method for rust-preventing corrosive metal materials in an inorganic cured product, which is characterized by applying a mortar composition containing aggregate. [Claim 11] After applying cement paste to the surface of the inorganic hardened material in which the corrosive metal material is embedded, a rust preventive agent is incorporated into the porous aggregate, and the surface is coated with cement. Corrosive metal materials in an inorganic cured product are rust-proofed by applying a mortar composition made of aggregate and aggregate in which an alkali metal salt is incorporated in the porous aggregate. construction method. [Claim 12] After applying cement paste to the surface of the inorganic hardened material in which the corrosive metal material is embedded, a rust preventive agent is incorporated into the porous aggregate, and the surface is covered with cement. An inorganic cured product characterized by applying a mortar composition formed by blending aggregate with porous aggregate containing an alkali metal salt and whose surface is coated with cement. A construction method to prevent corrosive metal materials inside from rusting. 13. A mortar composition in which cement paste is applied to the surface of an inorganic cured material in which a corrosive metal material is embedded, and then an aggregate containing a rust preventive agent is mixed into the porous aggregate. 1. A method for rust-preventing corrosive metal materials in inorganic cured materials, which comprises applying a cement-based composition or a cement-based composition mixed with a rust preventive agent. 14. After applying cement paste to the surface of the inorganic hardened material in which the corrosive metal material is embedded, a rust preventive agent is incorporated into the porous aggregate, and the surface is covered with cement. A method for preventing corrosive metal materials in an inorganic cured product, which is characterized by applying a mortar composition containing aggregate and further applying a cement composition or a cement composition containing a rust preventive. A construction method that rusts. [Claim 15] After applying cement paste to the surface of the inorganic hardened material in which the corrosive metal material is embedded, a rust preventive agent is incorporated into the porous aggregate, and the surface is coated with cement. A cement-based composition that is coated with a mortar composition made by blending aggregate and porous aggregate with an alkali metal salt incorporated therein, and further mixed with a cement-based composition or a rust preventive agent. A method of rust-preventing corrosive metal materials in inorganic cured materials, which is characterized by applying. [Claim 16] After applying cement paste to the surface of the inorganic hardened material in which the corrosive metal material is embedded, a rust preventive agent is incorporated into the porous aggregate, and the surface is coated with cement. Applying a mortar composition formed by blending aggregate and porous aggregate containing an alkali metal salt and whose surface is coated with cement,
A method for rust-preventing corrosive metal materials in an inorganic cured product, which further comprises applying a cement-based composition or a cement-based composition mixed with a rust preventive agent.