KR100519605B1 - The manufacturing method and composition of Restoration mortar with function of sulfuric acid resistance - Google Patents

Abstract

The present invention is an ultra-fine powder sewage sludge mixture 50 to 80 kg, ordinary portland cement 10 to 30 kg, calcium sulfo aluminate-based shrinkage compensator 35 to 55 kg of inorganic binder composed of 1 to 10 kg ratio, acrylic or styrene butadiene copolymer 1 to 5 kg of selected resin composition, 0.1 to 0.5 kg of any compound selected from surfactants based on lignosulfonate, naphthalene formaldehyde (sulfonated naphthalene formaldehyde condensate), methyl cellulose or ethyl cellulose or polysaccharide 0.01 to 0.03 kg of any one compound selected from (polysaccharide) thickeners, 0.05 to 0.1 kg of polyethylene fiber, 40 to 60 parts by weight of size 1 yarn, 40 to 60 parts by weight of silica sand 38 to 45 Preparation of acid-resistant cross-sectional recovery mortar composed of 7-15 kg of porous silicate aggregate And a process for the composition.

Description

The manufacturing method and composition of Restoration mortar with function of sulfuric acid resistance}

The present invention relates to a composition of the acid-resistant cross-sectional recovery mortar and a method for manufacturing the same, in detail, the acid-resistant cross-section that extends the service life of the facility in the long term by inhibiting chemical corrosion and increasing durability of concrete facilities in a special chemical environment The present invention relates to a recovery mortar, and to a method and composition for producing acid-resistant cross-sectional recovery mortar applied to the maintenance and reinforcement of sewer concrete structures, various polluting facilities, and general concrete structures.

In particular, the present invention relates to a repair mortar developed to be ideally applied to the repair of structures in poor environments, such as the repair of sewage and chemical structures that are eroded by sulfuric acid. In spite of its excellent physical properties, polymer mortar, which is widely used as the first type of portland cement and polymer, is not suitable for use in an environment where chemical corrosion is strong. This problem is due to the lack of a general understanding of the specific chemical environment of concrete and the in-depth analysis of the causes of degradation of structures. It is necessary to precede the development of the. In addition, when the maintenance of facilities is becoming more important these days, it is more important to select a method using materials that are suitable for the use environment.

In general, one of the most important reasons for the soundness of concrete structures is alkalinity (alkalinity, pH). (OH that is generated by the Na, K, CSH, Ca (OH) _2, etc. ^-) alkaline given from the concrete by the reinforcement is a are protected from corrosion Ca (OH) ₂ is the most important alkali source.

The alkalinity of the concrete is not continuously maintained but is consumed by the external environment. The causes are directly elution associated with the inflow and outflow of water, carbonation reaction by infiltration of carbon dioxide, and indirectly corrosive substances. Porosity of concrete microstructure, and acceleration of carbon dioxide infiltration. If the coated concrete around the reinforcing bar is neutralized and loses its alkalinity, the reinforcing bar is corroded. At this time, cracks occur due to the accompanying expansion pressure, and the surrounding concrete is popped out, which ultimately shortens the life of concrete. The concept of neutralizing concrete is as follows.

Ca (OH) ₂ + CO ₂ → CaCO ₃ + H ₂ O

(Reduction of OH ^- concentration in pore solution)

The number of years that the concrete is neutralized is usually about 60 years, but the speed is rapidly progressing according to the change of the natural environment (greenhouse effect, acid rain, etc.) and the use environment. The sewage structure to which the present invention is specifically applied does not have an advantageous condition in terms of durability of concrete structures due to the repeated use of wet and dry, highly corrosive wastewater, and the concentration of acid rain in the rainy season. It is an urgent situation. Chemical erosion of concrete can be divided into two types according to the mechanism of erosion.

1) Deterioration and collapse of concrete by causing chemical reaction with cement hydrate of concrete and converting cement hydrate which is insoluble in water to soluble substance. These include the majority of acids, animal and vegetable oils of any kind, inorganic salts of any kind, and corrosive gases such as hydrogen sulfide or sulfur dioxide.

2) Represented by sulphates, which are accompanied by expansion when reacting with cement hydrate in concrete to form new compounds. The concrete is deteriorated by the expansion pressure at this time. Chemical erosion of concrete structures is inherently problematic under special circumstances, such as industrial facilities such as chemical and food factories, marine environments, sulphate soil areas and hot spring areas, and is not so important for concrete under normal conditions. However, the importance of concrete structures is increasing due to the problem of acid rain, decomposition of hydrates by carbon dioxide, sulfuric acid produced by the action of microorganisms in sewage treatment facilities and sewers, etc. Chemical corrosion of concrete refers to a change in concrete caused by a chemical reaction. Decomposition of hydrates brings about the action of microorganisms with the formation of organic, inorganic acids, animal and vegetable oils, corrosive gases, carbon dioxide and sulfuric acid. . In addition, the production of expandable compounds include animal and vegetable oils, sulfate seawater and alkaline concentrated solutions, and the hardening of the hardened body due to dissolution and dissolution of hydrates may include the action of rich chloride and nitrate solutions. The process of chemically eroding concrete in sewage structures is as follows.

Currently, sewage-related facilities in Korea have not only been installed for a long time, but also aging is rapidly progressing. The repair methods currently adopted mainly include the cross-sectional repair method for repairing partial damaged parts, and the coating method for repairing deteriorated parts as a whole. Commonly used materials are polymer cements containing polymers in ordinary Portland cement, which are characterized by high compressive, flexural and adhesive strength characteristics. Therefore, there is an advantage that the whole, even with a thin coating thickness, can exhibit the integrity and repair effect with the member. The patent status of these materials is as follows. Korean Unexamined Patent Publication (Patent No. 2002-0053898) is a patent on cross-sectional expansion material that combines silica sand and various characteristic improving agents mainly based on Portland cement, and has excellent adhesion, tensile strength, impact resistance, durability, chemical resistance, breathability and workability. There is this. Korean Patent Application Publication No. 2000-0063356 describes polymer cement section restorative materials mainly composed of polymer, cement, and silica sand, and Korean Patent Application Publication No. 1998-075893 discloses garnet, white portland cement, and alumina. The present invention relates to a cross-sectional restorative material composed of cement, polymers, and other performance enhancing agents. All of these existing technologies have reasonable aspects for repairing general structures, but they have problems to be applied to repairing harsh environments such as sewage structures and polluting facilities. The reason for this is that, as described above, the resistance to chemical erosion of concrete such as sulfuric acid is significantly lacking in the existing polymer mortar, and thus, long term chemical corrosion of concrete is avoided when repairing sewage structures using these materials. It is difficult and ultimately causes problems that cause severe deterioration such as steel corrosion by neutralization. Therefore, in the case of sewage structures mainly intended for use in the present invention, it is essential to ensure acid resistance with chemical corrosion resistance of concrete due to the occurrence of sulfuric acid. It is very likely that you will be deteriorated.

The present invention is intended to be used exclusively in sewage structures and various polluting facilities in consideration of the chemical environment of the use conditions in consideration of the problems appearing in the repair materials for sewage structures in the past, which has acid resistance, adhesiveness, and excellent strength characteristics. It is to provide the construction suitability to develop acid resistant mortar and to be easily applied to various existing methods.

In particular, the present invention is not only not only has the construction characteristics suitable for mechanized construction for rationality of repair work, but also has a great feature in that it provides easy construction and economic efficiency in improving work efficiency such as a large amount of one-time construction.

The ultimate object of the present invention is to impart chemical resistance to materials used in repairing chemically degraded concrete structures, thereby inhibiting the formation of compounds exhibiting fragility against acids and various chemicals in cement hydrates. It provides the function to keep the concrete structure fundamentally healthy by giving a great effect and not causing any damage to other physical properties, thereby dramatically improving the chemical erosion resistance of the concrete. It is yet another object of the present invention to provide the physical properties of materials that are the primary prerequisites for repairing degraded concrete. That is, it gives excellent physical properties to the deteriorated part of the mother concrete and adheres well to the existing structure so that it does not drop out again and expresses strength expression (compression, bending tension), waterproofness, salt resistance, etc. It is an object of the present invention to provide a method and composition for producing an acid resistant cross-sectional recovery mortar having increasing physical properties.

In order to achieve the above object, the present invention is a copolymer resin composition such as acrylic or styrene butadiene, surfactant, shrinkage compensator, thickener based on the inorganic binder which combines ordinary portland cement with ultrafine powder sewage sludge mixture The present invention relates to a method and composition for producing an acid-resistant cross-sectional recovery mortar, which is an acid-resistant mortar prepared by mixing a combination of fibers and silica.

More specifically, the composition of the acid-resistant cross-sectional recovery mortar of the present invention is composed of ultra fine powder sewage sludge mixture 50 to 80 kg, ordinary portland cement 10 to 30 kg, calcium sulfoaluminate-based shrinkage compensator 1 to 10 kg ratio From 35 to 55 kg of the inorganic binder, 1 to 5 kg of the resin composition selected from the acrylic or styrene-butadiene copolymers, any one compound selected from surfactants of lignosulfonate and sulfonated naphthalene formaldehyde condensate 0.01 to 0.03 kg of any one compound selected from methyl cellulose or ethyl cellulose or a polysaccharide thickener, 0.05 to 0.1 kg of polyethylene fiber, 40 to 60 parts by weight of size 1 yarn, size 2 yarn To 40 to 60 parts by weight of silica sand 38 to 45 kg, porous silica The aggregate is composed of 7 to 15 kg, and the composition of the ultra fine powder of sewage sludge slag is any one compound selected from 5 to 10 kg of clay or pumice and 80 to 90 kg of sewage sludge, and 1 to 5 kg of anhydrous gypsum compound. It can be seen that the composition.

Ultrafine powder sewage sludge slag-based mixture in the present invention is a method for producing the following. The sewage sludge generated in the sewage is dried so that moisture is 10% or less, and 5 to 10 kg of clay or pumice is added to 80 to 90 kg of the dried sewage sludge. A combination of mixed sewage sludge and clay or pumice is calcined at 1300 to 1500 ^° C. in a rotary furnace to produce sewage sludge. The average chemical composition of sewage sludge is shown in Table 1, and the sintering reaction yields a hardenable mineral phase whose hydration is similar to that of ordinary portland cement. However, considering the Ca / Si ratio of sewage sludge slag, when it is mixed with ordinary portland cement to cause the hydration reaction, it lowers the Ca / Si ratio of the entire hydration system and thus plays a role of suppressing the formation of calcium hydroxide. The sewage sludge produced through the sintering reaction has a lumped shape, so it is pulverized using a ball mill. Before grinding, the anhydrous gypsum is mixed with 1 to 5 parts by weight of sewage sludge to grind the powder to 4000 to 8000 cm ² / g. As such, an ultra-fine powder sewage sludge-based slag mixture is produced.

Hereinafter, the present invention will be described in more detail. Ultra-fine powder sewage sludge slag mixture prepared in the same manner as described above prepared an inorganic binder composed of 50 to 80 kg, 10 to 30 kg of ordinary portland cement, 1 to 10 kg of calcium sulfoaluminate-based shrinkage compensator and the inorganic binder To 35 to 55 kg of the composition. 1 to 5 kg of any one compound selected from a resin composition selected from acrylic or styrene butadiene copolymers, and a surfactant selected from lignosulfonate or sulfonated naphthalene formaldehyde condensate based on the entire mortar composition. 0.1-0.5 kg of one compound, 0.01-0.03 kg of methylcellulose or any one selected from ethylcellulose or polysaccharide-based thickener, and 0.01-0.03 kg of polyethylene fiber, 0.05-0.1 kg of polyethylene fiber are combined, and the fine powder composition is combined. Based on the combination, the silica sand is combined to 45 to 60 kg based on the fine powder composition to form a final composition. The silica sand 40 to 60 parts by weight of size 1 yarn, 40 to 60 parts by weight of size 2 yarn. The composition is prepared by mixing homogeneously using a zero gravity mixer. Table 2 shows the combinations of the compositions.

Referring to the functional mechanism of each composition used in the invention as follows. The mechanism is divided into chemical and physical mechanisms. Ultra-fine powder sewage sludge mixture lowers the Ca / Si ratio of the entire inorganic binder system to below 1.5 level, producing calcium hydroxide (Ca (OH) ₂ ), which is the most vulnerable compound to acid and salt produced by hydration of cement-based materials. The most important role to realize the object of the present invention in the whole composition system by suppressing and converting into calcium silicate (CSH) to impart chemical resistance and excellence in the filling effect and long-term strength expression due to its own powder. In charge of. Here, the Ca / Si value of the inorganic system usually refers to the Ca / Si value of Ca (OH) ₂ and CSH, which are the main hydrates when the Portland cement is hydrated. Considering that the Si value is 1.5 level, it means that much Ca (OH) ₂ is produced. Therefore, lowering the specific gravity of Ca in the inorganic system can relatively suppress the generation of Ca (OH) ₂ .

In particular, the sewage sludge-based mixture has excellent sulfuric acid resistance, which significantly improves corrosion resistance by sulfuric acid produced in sewage structures. Anhydrous gypsum used in the manufacture of sewage sludge mixtures acts as a stimulator to promote the hydration of sewage sludge slag, and is an expansive substance, which is an expansive substance in combination with Ca and Al components eluted from the hydration of portland cement and sewage sludge It contributes to the production of linttite and shrinkage control. However, this sewage sludge mixture is disadvantageous in terms of chemical resistance when the amount is less than 50 kg of the total composition, in terms of initial curing and shrinkage when the amount is more than 80 kg. Ordinary portland cement, used as other inorganic binders, acts as an early strength and hydration promoting agent.

The action of the organic compound used in the present invention is as follows. Copolymer resin composition such as acrylic or styrene butadiene not only improves the workability of the composition and imparts a suitable viscosity for construction, but also connects the pores of the water-curable body resulting from condensation of cement-based compounds completely. By forming dense tissue, it blocks the diffusion of carbon dioxide and other harmful components and significantly improves the adhesion performance with maternal concrete, which is a very important requirement for repair of structures. At this time, if the amount of the resin composition to be added is 1kg or less, it does not exhibit good adhesion performance with the mother concrete, but if it is 5kg or more, it will adversely affect the initial workability. The surfactant plays a decisive role in lowering the predetermined unit quantity required for the work and drastically improving the work performance to give workability required for construction. At this time, if the amount of the surfactant added is 0.1 kg or less, the work performance of the mortar itself is not expressed, and if it is 0.5 kg or more, the flowability becomes excessive, and thus the workability suitable for the workability is not provided. Thickener serves to control the viscosity of the mortar according to the construction situation and at the same time has a moisturizing action to prevent the rapid evaporation of moisture and to maintain a constant, and to increase the viscosity of the paste when excessively added and causes a lot of difficulties in construction Preference is given to additions to the levels indicated in. Shrinkage compensator controls cracks due to shrinkage that may occur during repair of large sections and significantly improves the dry shrinkage of mortar in the long term. When the amount added is less than 1 kg, the effect of shrinkage control is insignificant. Above 5 kg will result in overexpansion or decrease in compressive strength. Fiber used in the present invention serves to suppress the occurrence of cracking in the long-term age by improving the resistance to dry shrinkage in the mortar.

At this time, if the amount of the added fiber is 0.05kg or less, the effect is insignificant, and 0.1kg or more adversely affects the workability of the entire mortar.

In the present invention, there are two fine aggregates added as a composition of mortar, one of which is a combination of siliceous silica sand and porous siliceous aggregate. Silica sand not only improves resistance to shrinkage but also has chemical resistance on its own components, and in this case, it is important to use silica sand with a particle size adjusted to maintain proper workability. At this time, the added silica is in the amount of 45 kg or less of the total composition, the amount of the binder is increased, there is a risk of causing excessive shrinkage of the mortar, and if more than 60 kg has a disadvantage of deteriorating the compressive strength.

(Table 1) Sewage sludge chemical composition (Unit: percentage)

  division SiO ₂ Al ₂ O ₃ Fe ₂ O ₃ CaO MgO Cl ^- H ₂ O 49.2 30.04 9.96 5.29 1.61 640 ppm 70.1

Table 2 Acid-resistant cross-sectional recovery mortar compound composition (unit: parts by weight)

division Ultra Fine Powder Sewage Slag Mixture Common Portland Cement Shrinkage Compensation Material Powdered resin Surfactants Thickener fiber Aggregate 25 to 35 6-15 2 to 4 1 to 5 0.1 to 0.5 0.01 to 0.03 0.05 to 0.1 53

Hereinafter, the present invention will be described in detail through examples.

Example 1

First process (production of ultra fine powder sewage sludge mixture)

After adding 10 kg of clay or pumice to 85 kg by weight of sewage slurries dried to 10% or less, and then mixing 5 kg of anhydrous gypsum into sewage slag produced by firing at 1300 to 1500 ^o C in a rotary furnace, using a ball mill The powder is pulverized to 4000 ~ 8000cm ² / g to prepare a fine powder sewage sludge mixture,

Second process (production of acid resistant cross-sectional recovery mortar)

Ultrafine powder sewage sludge slag mixture material prepared in the first step 77Kg ordinary portland cement 14Kg, calcium sulfoaluminate-based shrinkage compensator 44.28 kg of an inorganic binder prepared by mixing 9kg, acrylic copolymer reemulsifying powder resin 2.5 kg, lignosulfonate-based surfactant 0.1kg, methylcellulose thickener 0.02kg, polyethylene fiber 0.1kg was added and 40kg by weight No. 1, 60kg by weight No. 2 mixed 53kg of silica sand By mixing in a gravity-free mixer to prepare an acid-resistant cross-sectional recovery mortar.

Example 2

First process (production of ultra fine powder sewage sludge mixture)

5 kg of clay or pumice is added to 90 kg of sewage sludge dried to less than 10% moisture, and then 5 kg of anhydrous gypsum is mixed with sewage sludge produced by firing at 1300 to 1500 ^o C in a rotary furnace. Grinding to 4000 ~ 8000cm ² / g to prepare the ultra fine powder sewage slag mixture,

Second process (production of acid resistant cross-sectional recovery mortar)

Ultrafine powder sewage sludge slag mixture prepared in the first step, 77 Kg of ordinary portland cement, 44.28 kg of inorganic binder prepared by mixing calcium sulfoaluminate-based shrinkage compensator at a rate of 9 kg, styrene-butadiene copolymer Flammable powder resin 2.5kg, Sulfonated naphthalene formaldehyde condensate-based surfactant 0.1kg, Polysaccharide thickener 0.02kg, Polyethylene fiber 0.1kg is added, Size 1 40 parts by weight, Size 2 No. 60 45 kg of silica sand mixed in the weight part ratio and 8 kg of porous silicate aggregate were mixed in a gravity-free mixer to prepare an acid resistant cross-sectional recovery mortar.

Experimental Example (1)

The acid resistant cross-sectional recovery mortar prepared in Example 1 was made into a specimen and various performance evaluations were performed. Table 3 shows the compounding ratio of the examples and Table 4 shows the results of the performance evaluation.

Experimental Example (2)

The acid resistant cross-sectional recovery mortar prepared in Example 2 was made into a specimen and various performance evaluations were performed. Table 3 shows the compounding ratio of the examples and Table 4 shows the results of the performance evaluation.

Comparative Experimental Example (1 to 2)

For comparison with Examples, a standard specimen was prepared by mixing standard yarn and tap water with ordinary portland cement having a powder degree of 3200 cm ² / g. (Comparative Example 1) Also, a polymer mortar circulated on the market was obtained to obtain tap water 17 After adding the parts by weight, the mortar was kneaded in a stirring mixer to prepare specimens, and various performance evaluations were performed. (Comparative Example 2) Table 3 shows the results of the performance evaluation in Table 3.

Table 3 Formulation Composition of Examples and Comparative Examples (Unit: parts by weight)

division Ultra Fine Powder Sewage Slag Mixture Common Portland Cement Shrinkage Compensation Material Powdered resin Surfactants Thickener fiber Quartz sand Porous Silicate Aggregate water Example 1 34.08 6.2 4 2.5 0.1 0.02 0.1 53 17 Example 2 34.08 6.2 4 2.5 0.1 0.02 0.1 45 8 17 Comparative Example 1 47 53 17 Comparative Example 2

Table 4 Performance Evaluation Results

  division Compressive strength (kgf / cm ² ) Adhesion Strength (kgf / cm ² ) Flexural strength (kgf / cm ² ) Acid resistance (5% H ₂ SO ₄ ) 28 days immersion Dry shrinkage (× 10 ^-4 mm) 7 days 28 days 7 days 28 days 7 days 28 days  Weight change rate (%)   Acid penetration depth (mm) Example 1 469 514 21 27 70 97 4.4 2.8 -470 Comparative Example 1 463 556 7 12 23 48 -36.8 7.0 -1600 Comparative Example 2 272 373 11 16 57 73 -23.4 3.6 -865

Intangible and intangible effects that can be achieved in the present invention are as follows.

First, by presenting a manufacturing method that can utilize social wastewater waste, which is a social problem, as a repair material for major structures, it relies on landfill or ocean dumping after incineration, causing environmental pollution as well as economic costs. Waste was valued as a resource recycling material.

Second, as a method for repairing sewage structures among infrastructural infrastructures that are potentially invisible or left unattended for long periods of time, the design concept of materials closest to the physicochemical specificities of the use environment is introduced, in addition to the construction method alone. By maximizing the effect of repairing the structure using these materials.

Third, the present invention can be utilized not only in sewage facilities but also in fields requiring chemical resistance such as chemical plant floors, livestock processing plants, and port structures.

Claims (4)

In the composition of the acid-resistant cross-sectional recovery mortar, Ultra fine powder sewage sludge mixture 50 to 80 parts by weight, 10 to 30 parts by weight of ordinary portland cement, 35 to 55 kg of inorganic binder composed of calcium sulfoaluminate-based shrinkage compensator, 1 to 10 parts by weight, copolymer of acrylic or styrene butadiene 1 to 5 kg body weight selected resin composition, 0.1 to 0.5 kg of any one compound selected from surfactants based on lignosulfonate, sulfonated naphthalene formaldehyde condensate, methyl cellulose or ethyl cellulose or polysaka 0.01 to 0.03 kg of any one compound selected from a polysaccharide thickener, 0.05 to 0.1 kg of polyethylene fiber, 40 to 60 parts by weight of size 1 yarn, and 40 to 60 parts by weight of size 2 yarn, Acid resistance, characterized in that 45kg, porous silicate aggregate is composed of 7 to 15kg If the composition of the repair mortar. The composition of claim 1, wherein the ultra fine powder of sewage sludge mixture is  Sewage sludge 80-90 kg of any one compound selected from 5 to 10 kg of clay or pumice, and 1 to 5 parts by weight of anhydrous gypsum compound composition of the acid-resistant cross-sectional recovery mortar. In the production method of acid resistant cross-sectional recovery mortar, First process (production of ultra fine powder sewage sludge mixture) 5 to 10 kg of clay or pumice is added to 80 to 90 kg of sewage sludge dried to less than 10% of water, and then 1 to 5 kg of anhydrous gypsum to sewage slag produced by firing at 1300 to 1500 ^o C in a rotary furnace. After mixing, using a ball mill to pulverize the powder to 4000 ~ 8000cm ² / g to prepare a fine powder sewage sludge mixture, Second process (production of acid resistant cross-sectional recovery mortar) Ultrafine powder sewage sludge slag mixture prepared in the first process 50 to 80 kg, ordinary portland cement 10 to 30 kg, calcium sulfoaluminate-based shrinkage compensator 35 to 55 kg of inorganic binder composed of 1 to 10 kg ratio, acrylic or 0.1 to 0.5 kg of any one compound selected from styrene butadiene copolymer selected from surfactant composition of 1 to 5 kg, lignosulfonate, sulfonated naphthalene formaldehyde condensate-based surfactant, methyl cellulose or ethyl 0.01 to 0.03 kg of any one selected from cellulose or polysaccharide thickener, 0.05 to 0.1 kg of polyethylene fiber, 40 to 60 parts by weight of size 1 yarn, 40 to 60 parts by weight of size 2 yarn 45 to 60 kg is added to the silica sand, characterized in that prepared by mixing in a gravity Acid recovery method for producing a cross-section mortar. In the production method of acid resistant cross-sectional recovery mortar, First process (production of ultra fine powder sewage sludge mixture) 5 to 10 kg of clay or pumice is added to 80 ~ 90 kg of sewage sludge dried to less than 10% water, and then calcined at 1300 to 1500 ^o C in a rotary furnace and mixed with 1 to 5 kg of anhydrous gypsum in the produced sewage slag The powder was pulverized to 4000 to 8000 cm ² / g to prepare ultra fine powder sewage slag mixture, Second process (production of acid resistant cross-sectional recovery mortar) Ultrafine powder sewage sludge slag mixture prepared in the first process 50 to 80 kg, ordinary portland cement 10 to 30 kg, calcium sulfoaluminate-based shrinkage compensator 35 to 55 kg of inorganic binder composed of 1 to 10 kg ratio, acrylic or 1 to 5 kg of the selected resin composition in the styrene-butadiene copolymer, 0.1 to 0.5 kg of any one compound selected from surfactants based on lignosulfonate, naphthalene formaldehyde (sulfonated naphthalene formaldehyde condensate), methyl cellulose or ethyl cellulose Or 0.01 to 0.03 kg of any one compound selected from polysaccharide thickeners, 0.05 to 0.1 kg of polyethylene fiber, 40 to 60 parts by weight of size 1 yarn, and 40 to 60 parts by weight of size 2 yarn. 38 to 45 kg of silica sand and 7 to 15 kg of porous silicate aggregate were added in a zero gravity mixer. The combined acid recovery method of manufacturing cross-section, characterized in that the mortar prepared.