KR101755172B1 - Ultra rapid harding ceramic mortar composition for road repair and strengthening and construction method thereof - Google Patents

Abstract

The present invention has a simple workability in which only water can be mixed without using a separate primer in a work site, and it is cured quickly while maintaining excellent adhesion with concrete roads and asphalt roads, and has high strength and excellent waterproof function It has high tensile strength, no shrinkage, high durability, low tensile strain, excellent elastic modulus and freezing and thawing resistance. It can control curing time in the range of 30 ~ 90 minutes even in winter, A ceramic mortar composition for repairing reinforcement at an ultra-low-speed road which can be used in an underwater construction and can be used in a cryogenic warehouse at a cryogenic temperature, and can be used as an aggregate of crushed stone, and can be mixed with seawater Wherein the mortar composition is selected from the group consisting of Calcined Calcium Oxide 10 to 20 parts by weight of Magnesite, 20 to 20 parts by weight of Magnesite, 10 to 20 parts by weight of Magnesite, 5 to 10 parts by weight of Magnetite, 10 to 15 parts by weight of Ammonium Dihydrogen Phosphate or P ₂ O ₅ , 3 to 5 parts by weight of a hydration reaction modifier, and 20 to 40 parts by weight of crushed stone.

Description

TECHNICAL FIELD [0001] The present invention relates to a ceramic mortar composition for repairing reinforcement at a very low speed, and a method for constructing the same. BACKGROUND ART < RTI ID = 0.0 >

The present invention relates to a ceramic mortar composition for repair and reinforcement at an ultra-high speed road, and more particularly to a ceramic mortar composition and a method for constructing a concrete mortar composition for repairing and reinforcing concrete roads and asphalt High curing speed, high strength, no shrinkage, high durability, low tensile strain, excellent elastic modulus and freezing and thawing resistance. It is possible to adjust the curing time in the range of 30 to 90 minutes in winter and to have high compressive strength and adhesion strength. It is possible to use crushed stone as aggregate and mix with seawater (seawater, sea water) Ceramic mortar for repair and reinforcement at ultra-low speeds that can be used for cryogenic warehouses Compositions and to the application method.

In general, concrete structures are subjected to various natural or anthropogenic effects after construction, and their physical performance deteriorates due to physical and chemical deformation depending on the service years. Especially, in recent years, there has been an increasing effort to restore safety and performance by carrying out maintenance in terms of securing safety and performance of construction structures. If the aging phenomenon of the construction structure accelerates, it causes the sectional defects in the structure, that is, the concrete portion due to the expansion pressure caused by the corrosion of steel bars, freezing and thawing, and carbonation (neutralization) Which poses a risk of safety in terms of safety.

In order to remedy such problems, the maintenance of the structure should be stopped in case of repair or reinforcement work because the work should be stopped during the construction period.

On the other hand, most of the fast-setting or ultra-high-speed mortar used as a maintenance material is typically mortar based on ordinary Portland cement, and various kinds of mortars have been manufactured and used in the past. For example, there is a method of preparing a mortar by adding CSA (calcium sulfoaluminate) or a latex system and adding a predetermined powdery binding material. Most of these conventional fast-setting or quick-setting mortars are based on the formation reaction point of Ettringite, which is an expansive substance obtained from the chemical reaction between cement and water. Based on the constituent minerals expressing rapid hardness, CA · CA2 as aluminate-based mortar, calcium fluoro mainly composed of C11A7 and CaF ₂ as a main component can be divided into ah alloy mortar as a main component an aluminate-based mortar, and CSA.

However, the aluminate mortar has a problem that after the hydration reaction, the product is transferred to a secondary hydrate exhibiting low strength and is not stable over a long period of time. In particular, it is vulnerable to calcium chloride, which may deteriorate durability. In addition, calcium fluoroaluminate-based and boron-based mortars are relatively superior in performance, but require separate firing processes and may not be economical because additional processes are required to be pulverized into fine powder.

In addition, most of the mortar prepared through the above-mentioned alkali activating materials is not quick-hard but quick-acting, and at least one day is required for the strength to be exhibited after mixing with water. For example, it is difficult to apply to road repair in the winter, bridge repair, construction at a place in contact with water, and the like.

For this reason, in order to overcome the problem of the strength development time of the mortar, the alumina cement and the jet cement developed in the cement industry have been used to manufacture the quick-setting mortar. However, due to the nature of the repair mortar used for the external environment, Its use is limited because it is very sensitive to the durability (freeze-thaw, carbonation, etc.) related to the quality of the mortar and the outside temperature (drying shrinkage, etc.).

In order to solve such a problem, Korean Patent Laid-Open Publication No. 10-2015-0047929 discloses that 10 to 20 parts by weight of phosphate, 3 to 6 parts by weight of calcium silicate, 15 to 25 parts by weight of silica fume, 20 to 60 parts by weight of inorganic binder, 10 parts by weight of magnesium oxide and 5 to 10 parts by weight of magnesium oxide, it is possible to repair the road in an environmentally friendly manner without containing lime components such as existing Portland cement, to solve the problem of delay in curing time in winter, Since the curing time is faster than that of Portland cement, it is possible to repair the defective part of the road in a short time, thereby achieving economical and excellent stability.

However, in the above-mentioned prior art, it is not possible to mix only water without using a separate primer, and there is a problem that it is not enough to be used in underwater and cryogenic freezing warehouses.

As a known technique for solving such a problem, Korean Patent Publication No. 10-1507765 discloses a method in which water is mixed at a proper ratio and placed in a field, and after 30 minutes, applied at a high compression strength of 20 MPa or more and a high adhesion strength of 1.7 MPa or more (MgO, light) and sodium phosphate monobasic (NaH2PO4) which were fired at a temperature of 600 to 700 占 폚 as a composition were mixed at a weight ratio of 1: 1 占 짹 0.2 to obtain a first composition. A ceramic mortar composition for repairing cracks on a pavement having 25 to 5 parts by weight of calcium silicate (CaSiO3), 15 to 5 parts by weight of a calcined shell powder and 30 to 10 parts by weight of silica and having a composition of 100 wt% have.

However, the composition according to the prior art has insufficient properties such as compressive strength, adhesion strength, etc., so that it is not possible to obtain a desired degree of characteristics in the field of construction.

Korean Patent Publication No. 10-2015-0047929 Korean Patent Publication No. 10-1507765

It is an object of the present invention to provide a ceramic mortar composition for repairing and repairing a ceramic mortar for repair and reinforcement at an ultra-high speed road, which can be mixed only with water without using a separate primer, And to provide a construction method.

It is also an object of the present invention to provide a ceramic mortar composition for repair and reinforcement at a very low speed that satisfies all the test standards for structural characteristics, suitability characteristics, and durability characteristics required in mortar construction.

The ceramic mortar composition for repairing and repairing ultra-high speed roads according to the present invention comprises 5 to 10 parts by weight of Calcined Calcium Oxide or Magnetite, 1 to 5 parts by weight of Ammonium Dihydrogen Phosphate or P ₂ O ₅ 10 to 15 parts by weight of dolomite, 10 to 20 parts by weight of dolomite, 20 to 40 parts by weight of an inorganic binder, 3 to 5 parts by weight of a hydration reaction modifier, and 20 to 40 parts by weight of crushed stone.

In this case, the light calcium oxide may be a particle size of 60 mesh or less, and the magnetite may be a magnetite mixture in which 0.5 to 1 part by weight of Na ₂ S is mixed with 100 parts by weight of magnetite.

The inorganic binder may be any one or more selected from blast furnace slag, micro silica fume, zeolite, meta kaolin and slag, and the phosphorus pentoxide may be potassium hydroxide or potassium carbonate per 100 parts by weight of phosphorus pentoxide And 3 to 5 parts by weight of a phosphorus pentoxide mixture.

The method for constructing a ceramic mortar composition for repairing reinforcement at a very high speed according to the present invention includes the steps of removing floor debris and contaminants from a repair target area and arranging the surface cleanly (S410); (S420) of spraying water on the object to be treated so as to maintain moisture to such an extent as to moisten the object without water; (S430) mixing the ceramic mortar composition into an electric mixer and then mixing the mixture with water; Measuring the temperature of the mixed ceramic mortar composition (S440); (S450) of placing the ceramic mortar composition having the temperature measured at a repair target site (S450). In the case of performing the freezing or freezing warehouse construction in a subzero temperature range, phosphoric acid And the mixture is added.

The ceramic mortar composition for repairing reinforcement according to the present invention has a fast speed, high strength, no shrinkage and high durability, and has a low tensile strain with time, an excellent elastic modulus and freezing and thawing resistance, There is an advantage of maintaining excellent high ductility.

In addition, the ceramic mortar composition for repairing reinforcement according to the present invention is excellent in impact resistance and excellent in abrasion resistance, is free from damage and crack due to high load, is easy to repair and reinforce, can shorten construction time and work process, It is very suitable as construction, concrete structure repair, and earthquake-proof structure maintenance and reinforcement material.

In addition, according to the present invention, the ceramic mortar composition for repairing reinforcement at an ultra-high speed road can mix an admixture and a filler material according to a necessary condition to provide an emergency such as a highway, an airport floor, a bridge, a tunnel, a railroad, a harbor, various tanks, a water treatment facility, It can be used as construction structure and reinforcement material for reinforced concrete.

Further, even when mixed with any inorganic aggregate, the ceramic mortar composition for maintenance and reinforcement of ultra fast speed according to the present invention maintains excellent compressive strength and adhesion strength without deteriorating the strength, and the ceramic mortar composition of 1/3 thickness There is an advantage that it is possible to obtain a more excellent strength through the composition.

Accordingly, the ceramic mortar composition for repairing reinforcement at ultra-rapid speeds according to the present invention satisfies all of the requirements of structural characteristics, fit characteristics, and durability characteristics required for mortar construction.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart of a method for constructing a ceramic mortar composition for repair and reinforcement at ultra-rapid speeds according to the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention and may vary depending on the intentions or customs of the client, the operator, the user, and the like. Therefore, the definition should be based on the contents throughout this specification.

First, a ceramic mortar composition for repairing and repairing ultra-high speed roads according to the present invention will be described.

First, the initial velocity around road rehabilitation ceramic mortar composition according to the present invention is gyeongso calcium oxide (Calcined Calcium Oxide) or magnetite (Magnetite) 5 ~ 10 parts by weight of a first ammonium phosphate (Ammonium Dihydrogen Phosphate) or phosphorus pentoxide (P ₂ O ₅₎ it is prepared by mixing 10 to 15 parts by weight dolomite 10 to 20 parts by weight of inorganic bonding material 20 to 40 parts by weight, hydration control agent 3-5 parts by weight, and crushed stone (crushed stone) 20 to 40 parts by weight.

Herein, the light calcium oxide is obtained by heating calcium hydroxide or calcium carbonate, and is obtained by heating calcium oxide at a temperature of 700 to 1200 ° C. The light calcium oxide serves to control the strength and curing time of the ceramic mortar composition . If the content of the light calcium oxide is less than 5 parts by weight, the strength is weakened and the curing time is delayed. If the content of the light calcium oxide exceeds 10 parts by weight, the curing time becomes too fast and the construction becomes difficult.

It is preferred that the lightly calcium oxide be used as a fine powder having a particle size of 60 mesh or less for uniform mixing in the composition.

It is also possible to use magnetite in place of the light calcium oxide. When magnetite is used, it is preferable to use a magnetite mixture in which 0.5 to 1 part by weight of Na ₂ S is mixed with 100 parts by weight of magnetite.

In addition, the first ammonium phosphate reacts with light calcium oxide to increase the adhesiveness and to enable the product to be molded, and serves as a catalyst to cause a chemical reaction of the raw material. If the content of the first ammonium phosphate is less than 10 parts by weight, the adhesion is decreased and the curing time and the termination time for curing are delayed. If the content of the first ammonium phosphate is more than 15 parts by weight, .

Instead of the primary ammonium phosphate, phosphorus pentoxide may be used. In this case, it is preferable to use a phosphorus pentoxide mixture in which 3 to 5 parts by weight of a component selected from potassium hydroxide or potassium carbonate is mixed with 100 parts by weight of phosphorus pentoxide .

The dolomite is a filler which is used in various fields and exhibits mineralogical properties such as whiteness degree, chemical durability, high basicity, high melting point and excellent heat insulation property. The dolomite prevents the occurrence of cracks after application and improves the chemical durability. If the content of dolomite is less than 10 parts by weight, cracks are likely to occur and chemical durability may deteriorate. Even if the content of dolomite exceeds 20 parts by weight, the cost is increased without changing the physical properties of the product, .

The inorganic binder is a mixture of meta kaolin and blast furnace slag, and the mixture is added in a weight ratio of 70:30 to 30:70. The meta-kaolin can fill the gap between mineral particles such as light calcium oxide and the fine aggregate to make the cured body have a dense structure and increase the adhesion with the aggregate to enable a high strength invention and to decrease permeability and absorbency, It enhances the resistance to freezing and thawing and makes products with excellent durability. In addition, blast furnace slag improves watertightness and abrasion resistance and increases workability.

If the content of the inorganic binder is less than 20 parts by weight, compression strength, durability, water tightness and abrasion resistance are deteriorated. If the content of the inorganic binder exceeds 40 parts by weight, quickness, fast flowability and workability are lacking. Here, the inorganic binder may be a mixture of components selected from the group consisting of meta kaolin, blast furnace slag, micro silica fume and zeolite.

In addition, the hydration reaction controlling agent serves to control the curing curing time of the ceramic mortar composition. That is, in the case of hot weather or large-scale construction, the hardening or curing time of the ceramic mortar composition can be delayed by using a hydration reaction controlling agent to control the workability of the work. If the content of the hydration reaction regulator is less than 3 parts by weight, the curing time becomes too fast to reduce the workability. If the content of the hydration regulator exceeds 5 parts by weight, the curing time is too long to affect the initial compressive strength, .

The Crushed Stone is a mineral or rock pearstone mainly composed of limestone and dolomite, and serves as a filler for the ceramic mortar composition. The crushed stone has a crushed stone having a particle size of 12 to 18 mesh (average particle diameter of 1.3 mm) ranging from 20 to 30 parts by weight, a crushed stone having a particle size of 18 to 24 mesh (average particle diameter of 0.9 mm) (Crushed stone) having a particle size of 24 to 60 mesh (average particle diameter of 0.5 mm) is in the range of 30 to 40 parts by weight, and it is preferable to mix three types of crushed stone having different particle sizes . If the content of the crushed stone is less than 20 parts by weight, the compressive strength of the ultrafiltration and the termination is lowered, and if the content of the crushed stone exceeds 40 parts by weight, the compressive strength and workability of the ultrafiltration and termination are lowered.

Next, with reference to FIG. 1, a method of constructing a ceramic mortar composition for repairing reinforcement at a very high speed according to the present invention will be described.

First, the floor debris and pollutants in the place to be repaired are removed and the surface is cleaned up (S410).

Thereafter, water is sprayed on the place to be repaired so that moisture is retained so as to be moist without water (S420).

Thereafter, 5 to 10 parts by weight of light calcium oxide, 10 to 15 parts by weight of ammonium phosphate, 10 to 20 parts by weight of dolomite, 20 to 40 parts by weight of inorganic binder, 3 to 5 parts by weight of hydration reaction modifier, And 40 parts by weight of a ceramic mortar composition were put into an electric mixer, and water was added thereto to be mixed. At this time, 15 ± 5 parts by weight of water is added to 100 parts by weight of the ceramic mortar composition, and the mixture is mixed by an electric mixer for 3 to 5 minutes. In the case of subzero cold or frozen warehouse construction, 1 to 5 parts by weight of phosphoric acid is added and mixed.

Thereafter, the temperature of the mixed ceramic mortar composition is measured (S440).

Thereafter, the ceramic mortar composition whose temperature is measured is laid in the maintenance object place (S450). At this time, the temperature of the ceramic mortar composition at the time of pouring is 20 to 30 캜, more preferably 26 to 28 캜.

Hereinafter, the present invention will be described in more detail with reference to Preparation Examples. It should be apparent to those skilled in the art that these examples are for illustrative purposes only and are not to be construed as limiting the scope of the present invention.

[Preparation Example 1] Preparation of ceramic mortar composition for repair and reinforcement at ultra high speed road according to the present invention

(a) 9.5 g of light calcium oxide and 14.5 g of ammonium phosphate monobasic are dry mixed to form a dry mixture.

(b) 15 g of dolomite, 25 g of inorganic binder, 3 g of hydration reaction regulator and 33 g of crushed stone are mixed with the dry mixture to obtain a ceramic mortar composition.

Table 1 shows the acceptance criteria for the structural characteristics, the compatibility characteristics, and the durability characteristics of the ceramic mortar composition for repairing reinforcement at the first speed.

division Item Test basis standard Remarks rescue
characteristic Compressive strength KS F 2405 21Mpa or more
(Based on opening time) 3 pieces / set, Φ10 × 20 cm Flexural strength KS F 2408 3.15MPa or more
(Based on opening time) 3 pieces / set, Φ10 × 10 × 40㎝ Bond strength KS F 2762 1.4MPa or more
(Based on opening time) 3 pieces / 1 set, width 30 × length 30cm - square plate
Install repair material on old concrete plate fitness
characteristic Drying shrinkage KS F 2424 0.15 or less
(4 hours to 7 days of installation) 3/1 set, 4 x 4 x 16 cm - Rectangle
Mortar test, municipal curing Thermal expansion
Coefficient AASHTO TP 60 4.0 to 20.0 x 10 < ^-6 > / DEG C
(7 days curing) 3 pieces / set, Φ10 × 20 cm Modulus of elasticity KS F 2438 1.13 to 7.80 × 10 ⁴ MPa
(7 days curing) Utilization of compressive strength specimen Durability
characteristic Saline infiltration
Resistance KS F 2711 Below 200 ℃
(7 days curing) 2 pieces / set, Φ10 × 20 cm Freeze-thaw
Resistance KS F 2456 More than 80%
(14 days curing) 2 pieces / set, Φ10 × 10 × 40 cm Scaling
Resistance SS 13 72 44
Method A Above grade
(7 days curing) 2 pieces / 1 set, 15 × 15 × 5cm-square plate
56 cycles Wear
Resistance ASTM C 779 2 mm or less (30 minutes)
(7 days curing) 2 pieces / 1 set, 30 × 30 × 5cm - square plate
Procedure B

The structural characteristics of the ceramic mortar composition for repair and reinforcement at the ultra-rapid speed according to the present invention were tested for the test standards shown in Table 1, and the test results for the adhesion strength are shown in Table 2 below. However, the above test was conducted by Korea Institute of Construction & Urban S & T Korea Institute of Construction &

Test item Young unit Test Inspection Method Test result Bond strength 2 hours MPa KS F 2762 -'06 1.56 4 hours 1.88

As can be seen from Table 2, the adhesion strength of the ceramic mortar composition for repairing reinforcement at the initial speed according to the present invention rises with lapse of time, and it has already met the criteria of structural characteristics after 1 hour as the minimum measurement time .

Table 3 below shows the test results of the ceramic mortar composition for repairing reinforcement at the ultra-rapid speed according to the present invention with respect to the compression flexural strength according to the test standard of Table 1 above. However, the above test was carried out by Korea Institute of Construction & Living Environment Test.

Test Items unit Test Methods Test result Compressive strength -1 (1 hour) MPa KS F 2405: 2010
26.2 Compressive strength -2 (1 hour) 24.0 Compressive strength -3 (1 hour) 24.6 Compressive strength -1 (3 hours) 30.8 Compressive strength -2 (3 hours) 24.8 Compressive strength -3 (3 hours) 26.8 Compressive strength-7 (4 hours) 27.8 Compressive strength-8 (4 hours) 32.1 Compressive strength-9 (4 hours) 30.1

As can be seen from the above Table 3, the compressive strength of the ceramic mortar composition for repairing reinforcement at the initial speed according to the present invention already satisfied the criteria of the structural characteristics after 1 hour as the minimum measurement time.

Table 4 shows the test results of the ceramic mortar composition for repairing reinforcement at the initial speed according to the present invention with respect to the bending strength according to the test standard shown in Table 1 above. However, the above test was carried out by Korea Institute of Construction & Living Environment Test.

Test Items unit Test Methods Test result Flexural strength -1 (2 hours) MPa KS F 2408: 2000
5.7 Flexural strength -2 (2 hours) 5.7 Flexural strength -3 (2 hours) 5.9 Flexural strength -1 (4 hours) 5.5 Flexural strength -2 (4 hours) 5.9 Bending strength -3 (4 hours) 6.5

As can be seen from Table 4, the flexural strength of the ceramic mortar composition for repairing reinforcement at the initial speed according to the present invention has already met the criteria of the structural characteristics after 2 hours as the minimum measurement time.

Next, the shrinkage, thermal expansion coefficient and elastic modulus of the ceramic mortar composition for repairing reinforcement at the ultra-high speed road according to the present invention were measured according to the test standard of Table 1, same. However, the above test was conducted by Korea Institute of Construction & Urban S & T Korea Institute of Construction &

Test Items unit Test Methods Test result Dry shrinkage (7 days) % KS F 2424-'95 0.0507 Thermal Expansion Coefficient (Day 7) / C AASHTO TP 60-'10 6.6 × 10 ^-6 Elastic modulus (day 7) MPa KS F 2438-'02 1.90 x 10 ⁴

As shown in Table 5, the shrinkage rate of shrinkage was significantly lower than that of the test standard, and the thermal expansion coefficient and elastic modulus satisfied all the test standards.

Next, in order to determine the durability of the ceramic mortar composition for repairing reinforcement at the ultra-rapid speed road according to the present invention, abrasion resistance, freeze-thaw resistance and scaling resistance according to the test standards shown in Table 1 were measured and the results are shown in Table 6 . However, the above test was conducted by Korea Institute of Construction & Urban S & T Korea Institute of Construction & Also, the freeze-thaw resistance was measured by the A method for 300 cycles as the relative dynamic modulus.

Test Items unit Test Methods Test result Abrasion Resistance (Day 7) Mm ASTM C 779-'10 (type B) 0.65 Freeze-thaw resistance (14 days) % KS F 2456-'08 81.0 Scaling Resistance (Day 7) Kg / ㎡ SS 13 72 44: 2005
(Method A) Great m ₅₆ : 0.22 m ₅₆ / m ₂₈ : 1.88

The results of Table 6 show that the abrasion resistance, freeze-thaw resistance and scaling resistance all satisfy the test criteria.

Therefore, it was found that the ceramic mortar composition for repair and reinforcement at ultra-rapid speeds according to the present invention is suitable for use as a quick-setting mortar by satisfying all of the test criteria for structural characteristics, suitability characteristics, and durability characteristics. In other words, it has high tensile strength, high shrinkage, no shrinkage, high durability, low tensile strain with time, excellent elastic modulus and freeze - thaw resistance.

It is highly resistant to impact and excellent abrasion resistance. It is free from damage and crack due to high load, easy to repair and reinforce, shortens construction time and work process, and is suitable for emergency repair work, concrete structure repair, and earthquake resistant structure maintenance reinforcement material. Do. In addition, according to the necessary conditions, it can be used as emergency construction materials such as highways, airport floors, bridges, tunnels, railways, harbors, various tanks, water treatment facilities, water supply and sewage facilities, and reinforcing concrete reinforcing materials by mixing admixture and filler. Further, even when mixed with any inorganic aggregate, excellent compressive strength and adhesion strength can be maintained without lowering the strength, and even more excellent strength can be obtained even through a 1/3 thickness ceramic mortar composition than a general Portland cement structure .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Various changes, modifications or adjustments to the example will be possible. Therefore, the scope of protection of the present invention should be construed as including all changes, modifications, and adjustments that fall within the spirit of the technical idea of the present invention.

Claims (7)

5 to 10 parts by weight of light calcium oxide, 10 to 15 parts by weight of ammonium phosphate monobasic, 10 to 20 parts by weight of dolomite, 20 to 40 parts by weight of inorganic binder, 3 to 5 parts by weight of hydration reaction modifier and 20 to 40 parts by weight of crushed stone ≪ / RTI &
The lightly calcium oxide is obtained by heating calcium oxide to a temperature of 700 to 1200 ° C, and has a particle size of 60 mesh or less,
The inorganic binder is a mixture of meta kaolin and blast furnace slag in a weight ratio of 70:30 to 30:70,
The crushed stone comprises 20 to 30 parts by weight of crushed stone having a particle size of 12 to 18 mesh, 30 to 40 parts by weight of crushed stone having a particle size of 18 to 24 mesh and 30 to 40 parts by weight of crushed stone having a particle size of 24 to 60 mesh Wherein the ceramic mortar composition for repair and reinforcement at ultra low speed roads is characterized by being a mixture.
delete delete delete delete A construction method using the ceramic mortar composition for repair and reinforcement at the initial speed according to claim 1,
Removing the floor debris and pollutants in the repair target place and arranging the surface cleanly (S410);
(S420) of spraying water on the object to be treated so as to maintain moisture to such an extent as to moisten the object without water;
(S430) mixing the ceramic mortar composition into an electric mixer and then mixing the mixture with water;
Measuring the temperature of the mixed ceramic mortar composition (S440);
(S450) placing the ceramic mortar composition having the temperature measured at the repair target site (S450) on the surface of the ceramic mortar composition.
The method of claim 6,
Wherein the mixing is performed by adding 1 to 5 parts by weight of phosphoric acid in the case of subzero cold or freezing warehouse construction.

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