JPH02229775A - Method for curing hydraulic system - Google Patents

Abstract

PURPOSE:To prevent cracking and efflorescence and to increase strength by impregnating water, steam, etc., into a water absorbing hydraulic system and wet-curing this hydraulic system. CONSTITUTION:A water absorbing hydraulic system is formed, e.g. by adding a proper amt. of a reactive agent. Steam, water or a reactive soln. is impregnated into the hydraulic system and this hydraulic system is wet-cured, cured with steam or cured in an autoclave.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention can reduce water permeability, reduce shrinkage rate to prevent cracks, increase strength, or further improve surface and formwork contact. This article relates to a hydraulic curing method that can make surfaces glossy and suppress efflorescence.

[Conventional technology] As curing methods for hydraulic systems including cement systems, air dry curing,
Moist curing, underwater curing, steam curing, and autoclave curing are known. It is also known to use an expansion agent to reduce shrinkage.

[Problem to be solved by the invention] Air-drying of cement-based materials not only causes water to evaporate before the eternal reaction progresses, creating many water gaps and increasing water absorption, but also causes cement particles to evaporate during evaporation. The cohesive force acts between them, causing them to contract and form cracks, and the generated efflorescence components (water-soluble salts mainly composed of calcium hydroxide that are generated when water is added to cement) become cement particles and aggregates. When it dries and dries by absorbing rainwater, etc., it migrates to the surface as the water evaporates, reacts with carbon dioxide gas, and produces secondary efflorescence.

In the case of cement-based curing in water, the dry hardened material is cured in water, so not only does it already have high water absorption, but the efflorescence component elutes and escapes to the outside, further increasing its water absorption and reducing the amount of efflorescence component. The strength also decreases accordingly. Furthermore, since efflorescence components are eluted in water, if the water is taken out and dried, the efflorescence components will adhere to the surface and secondary efflorescence will occur.

As a very efficient moist curing method for cement,
There is a known method of curing in a curing chamber filled with water.
The relationship between the volume of the curing room and the surface area of the cement system, the opening and closing of the door,
Due to the degree of airtightness of the curing room, it is extremely difficult to maintain the humidity at 100% and evaporation of water is unavoidable.Although this is the best energy-saving method, it cannot be called complete curing.

Element-based steam curing requires thermal energy, so it is only used within approximately 500 degrees Celsius to increase demolding strength, and the hydration reaction does not take place sufficiently, resulting in air-dry curing after demolding. Because of this, the water evaporates and the Eiwa reaction is reduced.
It has great strength and water absorption.

Autoclave curing of AIC, commonly known as product name Iton, etc.
If you cover the O-1 crepe curing immediately after foaming, the foam will be soaked by the pressure, so avoid foaming and wait a few hours before curing in the autoclave.Water evaporates and creates water gaps during curing, causing water absorption. The sex is great. In autoclave curing of cement-based products, curing is performed after demolding to prevent surface staining due to water droplets and corrosion of the mold, and the same applies to the above.

In other words, since the evaporation of water is invisible, water evaporation creates water gaps and becomes water absorbent, causing initial shrinkage, making it impossible to obtain sufficient strength, and furthermore, the efflorescence component moves to the surface. No one notices that efflorescence occurs due to the reaction with carbon dioxide gas, underwater curing is too complicated and is rarely practiced in practice, and wet curing and steam curing are also used in Waseda IB.
The current situation is that it is only used for type 2.

Incidentally, the use of an expanding agent not only increases the cost but also creates water gaps and requires skill in its usage.

The object of the present invention is to provide a cement-based curing method that solves the above problems.

[Means for Solving the Problems] In order to achieve the above object, the hydraulic system curing method of the present invention adds water vapor, water, Alternatively, the hydraulic system is impregnated with a reaction solution and subsequently subjected to wet curing, steam curing, or autoclave curing. It is characterized by

In addition, after demolding, a hydraulic system made with or without addition of an appropriate amount of reactant and cured in a sealed manner, wet-cured, or steam-cured is impregnated with steam, water, or a reaction liquid, and the hydraulic system is subsequently moistened. Curing, steam curing, or autoclave curing may be used.

In addition, it is made by adding an appropriate amount of reactant and is sealed and moistened.
Alternatively, the steam-cured hydraulic system may be moist-cured, steam-cured, or autoclaved after demolding.

[Effect] When a water-absorbing hydraulic system prepared with or without the addition of an appropriate amount of reactant is impregnated with steam, water, or a reaction liquid, and subsequently subjected to moist curing, steam curing, or autoclave curing, the hydraulic system is sufficiently cured. The hydration reaction proceeds smoothly without running out of the water necessary for the reaction, regardless of whether it is a cement-based, silica-based, or cement-silica-based product, as it is cured in a water-containing state while suppressing the evaporation of water. Since it is not soaked and cured, in the case of cement or cement silica, the efflorescence component hardens without being eluted to the outside, resulting in a hardened product that is dense, difficult to absorb water, has little shrinkage, and has high strength. The water-absorbing hydraulic system may be a cured product, and may be an uncured product with a water-cement ratio of 40% or less, such as green roof tiles after press dewatering of thick slate or concrete blocks after vibration press molding. Hydration of water to cement (mostly bound water 2
5%, gel water 15%, total 40%. ]. In addition, if the hydraulic system is made by adding an appropriate amount of reactant or is cured by impregnating it with a reaction liquid, if the hydraulic system is cement-based or cement-silica-based, the reactant or reaction liquid may be an efflorescence component. As a result of the reaction, the cured product becomes denser, less water absorbent, less shrinkable, and has higher strength, and the efflorescence component is consumed, which is effective in suppressing efflorescence.

In addition, when the water-absorbing hydraulic system described in Section 7 is demolded by closed curing, humid curing, or steam curing, the permanent reaction progresses better than that of air-dry curing. The action and effect are even more remarkable.

In addition, when a hydraulic system made by adding an appropriate amount of a reactant and cured in a hermetically sealed state, moist-cured, or steam-cured is subjected to moist-curing, steam-curing, or autoclave curing after demolding, the curing before demolding will cause a permanent reaction. In addition, the efflorescence component and the reactant react,
Cement glue and reactants are generated in the capillary water,
It also has a water-retaining effect and becomes more compact, less water-absorbent, has low shrinkage, and has high strength.The above-mentioned effects progress during curing after demolding, and even though it is cured without water impregnation, it is effective in suppressing efflorescence. Most effective and necessary.

[Example] Examples will be described while comparing cases where a reactant (for kneading) and a reaction liquid (for impregnation) are used and cases where they are not used. Incidentally, Boltland Cement 1~ was used as the cement, and the numbers indicate parts by weight. In addition, in both wet curing methods, water is poured into the bottom of a Styrofoam curing box, a slatted board is placed on top of it, and the test specimen is placed on top of the slatted board to prevent it from getting wet.
It was covered with a styrofoam lid and sealed tightly for curing.

Example 1 Raw mortar with cement:sand = 1:2 was pressed and dehydrated, molded, air-dried for 2 days, immersed in a reaction solution for 2 hours, taken out, kept wet for 8 days, and taken out. 4
The bending strength of the specimen that was air-dried for one day (test specimen B) was 165
．． The flexural strength of the specimen weighing 2 kg and wet-cured by soaking in water instead of the reaction solution (test specimen C) was 157 kg, and the same-day flexural strength of the specimen cured in air (test specimen A) was 123.2 KQ. Water was dropped on test specimens A, B, and C to investigate the state of water absorption, and test specimens A, B, and C were the easiest to absorb water, while specimens B were the least likely to absorb water.

Example 2 Fresh mortar with cement 1~:sand = 1 = 3, water-cement ratio 55% (using water to which 1% of the cement amount of reactant was added) was wet-cured for 24 hours immediately after molding, and then taken out. After demolding, the sample was soaked in water for 5 minutes, kept wet for 9 days, and then air-dried (test specimen B). The 14-day compressive strength was 286 KCI; The 14-day compressive strength of the specimen (test specimen A) was 142 Kq. In addition, when water was dropped onto test specimen B with a dropper, it was difficult to absorb water, so much so that it could be mistaken for water repellency.
absorbed water easily.

Example 3 A foaming solution was prepared by adding 1 part of a reactant and 1 part of a foaming agent to 100 parts of water, and 34 parts of the foaming solution and 100 parts of cement were kneaded to make a paste. Add 13 parts of foam made with the foaming liquid and knead to make a foam-containing paste. Immediately after molding, the aerated concrete is soaked in water for 5 minutes, and after 24 hours it is soaked in water for 5 minutes. The 28-day compressive strength of the aerated concrete, which was then air-dried and cured, was 54.9 KCJ (specific gravity 0.68), approximately A
It exhibited strength equivalent to that of LC, and exhibited so little water absorption that it could be mistaken for water repellency.

Example 4 100 parts of cement, 200 parts of sand, 1 part of reactant, and 59 parts of water were mixed together and placed in a plastic container with an open top.The mixture was then immediately placed in a curing box filled with hot water at 90 degrees Celsius, sealed, and kept moist for 72 hours. Those that were cured, taken out, and demolded had greater gloss on the surface in contact with the container and lower water absorption than those that had been air-dried and cured.

Example 5 100 parts of cement, 10 parts of red husk, and 38 parts of water to which 1% of the reactant was added were kneaded and molded into a plate shape on a plastic plate. Immediately after molding, the mixture was steam-cured at 35 degrees for 16 hours, i.e., at 560 degrees. The object had a shiny surface. Immediately after demolding, soak in water, 2
When taken out after 4 hours and dried, eluate adhered to the surface, but it could be easily wiped off, the gloss did not disappear, and the color became slightly darker. Here, soak in water for 24 hours for 10 minutes.
When the eluate was wiped off each time, no eluate came out, the luster did not disappear, the color became even darker, and the water absorbency decreased, even showing water repellency.

Example 6 The molded specimen of Example 5 was steam-cured at 40 degrees for 72 hours, and the surface became glossy. Even after soaking in water for 24 hours, the gloss did not disappear, and no efflorescence was observed. Ta.

Example 7 Fresh mortar with a cement:chamotte ratio of 1:2 and a water-cement ratio of 60% was dehydrated by pressing immediately after kneading and molded into a plate shape.
Immediately after molding, the mortar was dried in a drying oven, baked at 1200 degrees, and slowly cooled for 24 hours. It was soaked in the reaction solution for 1 hour, and the surface was coated and the mortar itself became difficult to absorb water. A cured product was obtained.

As described above with respect to the seven embodiments, the present invention cures the cement system by suppressing the vaporization of water, promotes the smooth production of cement glue, and further reacts the efflorescence component with the reactant or reaction liquid. filling the capillary with the produced cement gel or further reactants to reduce the initial shrinkage of the cement system;
The purpose is to increase the strength, make it non-water absorbent, or suppress efflorescence, and the curing to suppress water evaporation may be airtight curing, moist IF curing, steam curing, or autoclave curing. Examples Humid rJI curing and steam curing in
Either moist curing, steam curing or autoclave curing may be used. In addition, to supplement the water or reaction solution that is insufficient in the cement system, impregnation methods such as brushing, spraying, dipping, etc. can be used. Moreover, the supplement of water is not limited to a cured product, but may be an uncured product with a low water-to-cement ratio. It is desirable to supplement the cured product with enough water or reaction solution to form a cement gel or to allow the reaction agent or reaction solution to react with the efflorescence component, but do not add enough water or reaction solution to prevent the efflorescence component from eluting and migrating to the surface. It is preferable to avoid impregnating with a thick layer in order to suppress the occurrence of secondary efflorescence.

When the purpose is to make the cement non-absorbent and increase its strength, the surface of the cement-based material is initially cured at high humidity (80% or more and 100% or less) to the extent that there is no dripping of dew condensation from the ceiling of the curing room. Once it is no longer contaminated by dripping with dew condensation water, it is desirable to cure it at a higher humidity, for example around 100% humidity, and if there is insufficient water, it may be impregnated with insufficient water (reaction liquid may be used) and cured.

When the purpose is to suppress efflorescence, it is preferable that the humidity is not 100%, but the humidity is kept high enough to avoid exposure, and the temperature is increased.

However, if the humidity is below 100%, the water will evaporate, so supplement the lack of water as needed to continue growing. The above method involves opening the curing chamber at regular intervals during humid curing or steam curing to shorten the period of 100% humidity, and then performing high-humidity curing.
This is achieved by constantly curing at high humidity and supplementing the lack of water by sprinkling water as necessary.

In addition, if curing with suppressed vaporization is performed at a temperature of about 30 degrees or higher, a gloss will appear on the top surface, if it is carried out at a temperature of about 30 degrees or less, a gloss will appear on the surface in contact with the formwork, and if it is carried out at a temperature of about 30 degrees, a gloss will appear on the top surface. It appears that the upper surface and the surface in contact with the formwork are glossy. That is, by selecting the temperature at the initial stage of curing (within about 3 to 6 hours), the surface and/or bottom surface can be made glossy or matte (although matte does not necessarily require the addition of a reactant). ), when creating a gloss on the surface in contact with the formwork, use a formwork with a smooth surface such as plastic without using a release agent. Incidentally, the use or non-use of the reactant and the reaction solution can be carried out depending on the purpose. The above-mentioned top surface gloss can be achieved even at temperatures below 30 degrees if there is no or very little water evaporation, but if the water is 30 U or higher, the reaction rate is fast, and the surface layer is formed quickly before the efflorescence component migrates to the surface. It is thought that the reaction progresses and gloss can be easily produced. Also, the gloss of the surface in contact with the formwork can be maintained even at temperatures above 30 degrees because the surface does not come into contact with the air, but the luster tends to disappear when water condenses and circulates around the surface. For glossy materials, including Examples 4 to 6, it is important to suppress secondary efflorescence, and it is preferable to perform the efflorescence suppression method described above.

The regimen of this invention can take the following embodiments.

(1) In Example 7, instead of chamotte, large stones, igneous rocks,
Refractory aggregates such as pottery scraps can be used, and the molding is not limited to press dehydration molding. Further, if the progress of the hydration reaction during drying is small, baking may be carried out at a temperature of 1,200 degrees or less, and if the hydration reaction is progressing considerably, baking may be carried out at a temperature of about 1,450 degrees.

(2) Supplementation of insufficient water such as steam curing or moist curing may be performed as many times as necessary.

(3) Curing in a sealed container is included in wet curing.

(4) Coat a synthetic resin emulsion (preferably one with a reactive agent added to it.Add a pigment when using it as a paint) on the surface of uncured materials such as fresh mortar or fresh concrete, or apply a vinyl coating. It may be cured by covering it with a non-water permeable material such as foam or styrofoam, or a non-water permeable heat insulating material.

These are included in wet curing, and removing sheets etc. is included in demolding.

(5) When placing an uncured material on the ground or concrete for curing, if the ground is damp and does not absorb moisture,
It is not necessarily necessary to provide an impermeable material layer between the ground and the like.

(6) The curing chamber can be filled with water in multiple stages or filled with sand or gravel, and steam can be sent to the curing chamber filled with water to raise the dew point or high humidity and stop the steam. Humidity and temperature can be adjusted by circulating hot water to evaporate and heat it, or by sending heated air. Alternatively, the curing room may be divided into sections and each section may be kept at an appropriate temperature and humidity for curing.

(7) Air may be pumped into a curing cover or a curing chamber and pressurized to suppress the vaporization of water for curing. Included in ll regimen.

(8) Air or carbon dioxide gas may be injected using pressure changes to react with the efflorescence component inside.

(9) The uncured product may be one to which flavoring agents, gravel, crushed stone, fibers, etc. are added.

(10) The cement is not limited to Boltland cement, and may be white Boltland cement, blast furnace cement, fly ash cement, or the like. Further, the uncured product may be prepared by adding a synthetic resin emulsion. The synthetic resin emulsion referred to in this invention also includes a synthetic rubber emulsion.

(11) The formwork, container, or curing chamber may be made of or surrounded by a non-water permeable material or a non-water permeable heat insulating material such as styrofoam. Those using non-water-permeable insulation materials not only save thermal energy, but also enable high-temperature, high-humidity curing by utilizing the heat of Eiwa reaction.

(12) The uncured product may be a high-temperature product kneaded with hot water or sprayed with steam.

<<13>> Curing while suppressing vaporization is carried out at at least 500 degrees Celsius or higher, preferably at 2000 degrees Celsius or higher, and more preferably at 30 degrees Celsius or higher.
00 to 5000 degrees or more is desirable.

(14) Two curing rooms will be provided, one for curing after molding (the first
Curing) and curing after demolding (second curing) may be performed in another room. Initially, steam curing is performed in a curing chamber filled with water, then the steam is stopped and the curing is switched to wet curing (first curing).After demolding, immersion in water or initial steam curing is performed in a curing chamber filled with water, resulting in insufficient water. Supplementing water, then switching to moist curing, supplementing the insufficient water as necessary and performing moist curing (second curing) will reduce corrosion of the formwork, save thermal energy, and provide economical and good curing. A cured product with remarkable strength properties can be obtained after curing for about 3 to 5 days in total. The curing temperature can be selected depending on the purpose.

(15) When curing a hollow body such as a hem pipe, seal both sides of the formwork with non-water permeable lids and pressurize the hollow part to 100% or high humidity by, for example, injecting steam. First curing is performed by coating the inner surface with a synthetic resin emulsion to form a film, supplementing the lack of water after demolding, and curing in a curing room or within a curing cover, or by coating the outer surface with a synthetic resin emulsion. Membrane 2
You may carry out subsequent curing.

(16) The cured product after molding may be impregnated with the reaction liquid to suppress primary efflorescence, and the cured product after demolding may be impregnated to suppress secondary efflorescence.

(17) When the time has passed and the water has evaporated by the time the cured product is molded and transported to the curing room, or when the water-to-cement ratio is 4.
In the case of an uncured molded product with a content of 0% or less, water may be sprayed or steam may be sprayed to replenish evaporated water or insufficient water, and the product may be transported to a curing room and cured while suppressing vaporization.

(18) The raw material is not limited to cement-based materials, nor is it limited to mere Eiwa reaction. For example, a product obtained by adding silica sand fine powder or the like and water to Bortland cement or foaming or foaming using a foaming agent or a foaming agent may be cured in an autoclave. In addition, lime and bozolan or cement may be used as the main raw materials, and aluminum powder or the like may be used as a foaming agent for foaming, as in conventional ALC.

Regarding foaming agents and autoclave curing, please refer to March 1963.
"Aerated Concrete" published by Ohmsha Co., Ltd. on May 15th
The manufacturing technology for the product names Iton, Ciporex, Durox, and Thermocon is introduced in , so detailed explanations are omitted. Foaming may be carried out by using a water-reducing foaming agent, a foaming agent and a water-reducing agent, or a foaming agent. When curing a general cement system, including ALG, in an autoclave, it is preferable to cure it by suppressing vaporization or supplementing insufficient water before carrying it into a curing room. I! The same applies when producing calcium acid plates.

(19) When molding a pole or the like by centrifugal force molding, an uncured material to which a coloring agent has been added may be molded first, and then an uncured material to which no coloring material has been added may be laminated and molded.

(20) When curing a hollow body such as a culvert box, sand or gravel is spread on top of the concrete or non-water permeable sheet that has formed the recesses, and water is poured on top of it. It is also possible to cure the item by covering it with a curing cover and increasing the humidity to 100% by, for example, sending steam.

(21) Reactants and reaction solutions include manganic acid, permanganic acid, orthophosphoric acid, metaphosphoric acid, hypophosphoric acid, phosphorous acid, silicic acid,
Acids such as sulfuric acid, nitric acid, hydrochloric acid, carboxylic acids (tartronic acid, malic acid, tartaric acid, gluconic acid, gulonic acid, citric acid, ascorbic acid, etc.), alkalis such as baking soda, ammonia water, water glass, etc. Commercially available products include silica sol such as Taloid (trade name) manufactured by Catalysts & Chemicals Co., Ltd., Mighty 150 (high condensation salt of naphthalene sulfonic acid/formalin), and Mighty 2 manufactured by Kao Corporation.
000, or water-reducing agents such as Sunflow MA (lignin-based) manufactured by Sanyo Kokusaku Valp Co., Ltd., thickeners such as Metroose and Hi-Metrose manufactured by Shin-Etsu Chemical Co., Ltd.
The presence of water, such as various silicones and microsilicas, various AE agents, fluidizing agents, efflorescence inhibitors, swelling agents, surfactants, foaming agents, water repellents such as potassium stearate, or mixtures thereof, etc. Any agent that reacts with the cement or its products under the conditions can be used, including those that react with multiple agents to reduce capillary space. Mighty 150 or Mighty 150 to which an appropriate amount of acid, alkali, and salts were added was used as the reactant in the examples, but the reactant is not limited to this. Specifically, for example, the following can be used as the reactant and reaction solution.

(A) Strong acids such as hydrochloric acid, hydrochloric acid, or nitric acid are 1,/
A dilution solution of about 1 million to 1/10 million can be used.

(8) For carboxylic acids such as tal-1-ronic acid, malic acid, tartaric acid, gluconic acid, gulonic acid, citric acid, ascorbic acid, etc., use a dilution or dissolution solution of about 1/200 to 1/500,000. Can be done.

(c) For alkalis such as lvJ, aqueous ammonia, and water glass, a dilution or solution of about 1/100 to 1/200,000 can be used.

(0) Silicas such as silica, silicone, and microsilica, thickeners such as Metrose, water reducers, water repellents, and other additives for coatings such as AE agents and fluidizers are 3 to 1/2
Dilutions as high as 100 can be used.

([) A mixture of two or more of the above drugs can be used.

When used as a reaction agent, the amount used is preferably about 0.3 to 100% based on the amount of cement used, and when used as a reaction liquid, it can be used as is.

(22) A container can be provided under the pallet or rack on which the cement-based material is placed, and water can be added together with sand, gravel, fibers, etc. for curing.

(23) To color cement-based materials, efflorescence can be suppressed by applying a paint containing the above-mentioned reactive agent or a synthetic resin emulsion containing a pigment, a reactive agent, or a stabilizer. .

(24) Humidity curing includes curing the airtight curing chamber by humidifying it with a commercially available humidifier. Includes children who get wet. Alternatively, a humidifier may be used to humidify a hollow part such as a fume pipe or a culvert box to provide high humidity containing 100%. In the case of a fume pipe, etc., if the sealing lids on both sides are made of non-water permeable heat insulating material, and the formwork for forming the cylinder is made of heat insulating material, or if it is covered with heat insulating material, the heat of reaction can be used to increase the temperature. Moist curing can be performed.

(25) Impregnating the hydraulic system with steam to supplement insufficient water includes impregnating moisture with the above-mentioned humidifier or the like.

(26) When the KiV pillar is filled to a certain extent with cement 1 to gel or the reaction product of the reactant or reaction solution with the efflorescence component,
Water retention occurs and efflorescence components are also trapped. Therefore, the internal efflorescence component may be reacted with the carbon dioxide gas by applying a pressure change or pressure as appropriate and injecting air or carbon dioxide gas.

(27) In this invention, if an object or method used in one embodiment is appropriate for the other embodiment, it can be used, utilized, or applied to the other embodiment.

[Effects of the invention] Conventional curing is mainly used to quickly develop demolding strength in order to improve the rotation of the mold, and the amount of water vaporized before curing and after IQ molding is large, which causes shrinkage, water absorption, and Unaware that it was related to the development of Chinese cabbage and low strength, the most essential initial curing within about 5 days after molding was neglected.

However, this invention is constructed as described above, and by curing while suppressing water evaporation, it is possible not only to suppress primary white spots, but also to suppress water pores and have low water absorption, or no water absorption, or water absorption. It is possible to create a cement-based hardened product that exhibits even water repellency, has low shrinkage, is hard to crack, has high strength, and is effective in suppressing secondary efflorescence, and has a luster that does not disappear even when immersed in water. Cured products that have been cured and cured products that have melted! S! It is also possible to save heat energy when wet curing, and the cured product produced has excellent durability and does not corrode the internal reinforcing steel! However, by adding fibers such as carbon fibers or knotted acrylic fibers or net materials, or by pre-stressing, it is possible to create cured products with high bending and tensile strength. It can be used to fill and cure spaces such as safes, fittings, panels, and countertops, and can also be mixed with lightweight aggregates such as hard perlite. block, reef,
Widely used in the production of secondary cement products such as kelp root wraps, tetra pots, concrete balls, retaining walls, artificial trees, PC boards, large flat boards, various decorative boards, permanent walls, piles, hume pipes, culvert boxes, side gutters, etc. In addition to construction of reinforced concrete, cellular reinforced concrete, and other cement-based structures on site (sealing and curing, impregnation with water or reaction solution after demolding, and use of adhesive tape on the surface, etc.) Cover and cure using non-permeable material such as sheets.

In addition, in the case of painted mortar, a synthetic resin emulsion is applied after the raw mortar is applied and cured by forming a film, but after the raw mortar is applied, it is covered with a plastic sheet and cured, and if water evaporation is observed. The plastic sheet is removed, the mortar is impregnated with water or the reaction solution, and the mortar is covered again with a plastic sheet and cured. Note that the plastic sheet may be foamed. Further, the mortar base is preferably water-impermeable, and a foamed plastic with an uneven pattern may be pressed and pressed onto the mortar surface. 》, concrete paved paths, concrete base for asphalt paved roads,
Not only can it be used for construction and civil engineering works such as basement construction, but it can also be used to make conventional ALC non-water absorbent and increase its strength. It is extremely versatile, as it can also be used to manufacture furnace structures.

Claims (3)

[Claims] (1) Impregnating a water-absorbing hydraulic system, prepared with or without the addition of an appropriate amount of reactant, with steam, water, or a reaction liquid, and subsequently moist-curing, steam-curing, or autoclaving the hydraulic system. A hydraulic curing method characterized by: (2) After demolding, a hydraulic system made with or without the addition of an appropriate amount of reactant and sealed, wet, or steam-cured is impregnated with steam, water, or a reaction solution, and the hydraulic system is subsequently moistened. A hydraulic curing method characterized by curing, steam curing, or autoclave curing. (3) Curing of a hydraulic system, which is characterized by adding an appropriate amount of a reactant and curing the hydraulic system in a hermetically sealed, moist, or steam-cured state, followed by demolding and then moist-curing, steam-curing, or autoclave curing. Law.