WO2015088203A1 - Appareil pour la production de béton à durcissement rapide par mélange et dissipation d'air dans du béton normal et ajout à ce dernier d'adjuvant conférant une haute résistance initiale, et son procédé de production - Google Patents

Appareil pour la production de béton à durcissement rapide par mélange et dissipation d'air dans du béton normal et ajout à ce dernier d'adjuvant conférant une haute résistance initiale, et son procédé de production Download PDF

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Publication number
WO2015088203A1
WO2015088203A1 PCT/KR2014/011981 KR2014011981W WO2015088203A1 WO 2015088203 A1 WO2015088203 A1 WO 2015088203A1 KR 2014011981 W KR2014011981 W KR 2014011981W WO 2015088203 A1 WO2015088203 A1 WO 2015088203A1
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WIPO (PCT)
Prior art keywords
concrete
mixed
fast
crude steel
air
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PCT/KR2014/011981
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English (en)
Korean (ko)
Inventor
윤경구
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강원대학교산학협력단
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Priority to CN201480075265.6A priority Critical patent/CN105992681B/zh
Priority to US15/103,269 priority patent/US10207233B2/en
Priority claimed from KR1020140174606A external-priority patent/KR101614119B1/ko
Publication of WO2015088203A1 publication Critical patent/WO2015088203A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00146—Sprayable or pumpable mixtures
    • C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite

Definitions

  • the present invention relates to a fast-hard concrete manufacturing apparatus for manufacturing fast-hard concrete and a method of manufacturing the same, and more particularly, to the air-mixing material to the air bubbles to be removed in the formation of fast-hard concrete with a general concrete mixture
  • the air-mixing material to the air bubbles to be removed in the formation of fast-hard concrete with a general concrete mixture
  • the cost aspect should be considered since it is much more expensive than the crude cement concrete, and the other, the resistance to freeze-thawing or cracking is weakened, reducing the long-term utility.
  • the crude concrete expresses 21 MPa compressive strength, which is the practical strength within 3 days, and expresses early strength by using crude steel cement or using crude steel mixed material or crude chemical chemical admixture.
  • Ultra-tensioned concrete expresses the practical strength in one day, and early strength is generally expressed by using a crude steel mixed material.
  • Cemented carbide cements are used in various emergency constructions because they exhibit utility strength after 3 hours of mixing with water.
  • the cemented carbide cements are classified into alumina cemented carbide, amorphous alumina cemented carbide, and Irwin cemented carbide according to the constituent minerals exhibiting the cementing properties.
  • These cemented carbide cements are blended 20 to 45% of each cemented carbide clinker powder with ordinary Portland cement, depending on its properties.
  • the cemented state refers to a state in which the cement paste is still soft, but the fluidity is lost, and the time of the cement paste is referred to as a cementing time, and the time is elapsed to show a solidified state. This is called.
  • the present invention has been made to solve the above problems, an object of the present invention, by mixing water, cement, aggregates, etc. mixed with air bubbles and crude steel mixed material in ordinary concrete transported to the site to improve the ball bearing effect of bubbles
  • the mixed concrete is used to form a mixed concrete, and when the mixed concrete is discharged, it is blown with high-pressure air to reduce the excess air contained in the mixed concrete, and at the same time, a large increase in slump due to the large amount of bubbles is achieved.
  • the present invention provides a fast concrete manufacturing apparatus and a method for manufacturing the fast concrete to produce fast concrete by adding air mixing and dissipation and crude steel mixture to the normal concrete shortening the fast concrete reduced to the slump range of the normal concrete.
  • Another object of the present invention because it is possible to manufacture only the amount of fast-hard concrete at the construction site, through the air mixing and dissipation and the addition of crude steel mixed materials to ordinary concrete that can improve the economics by reducing production and construction cost
  • An object of the present invention is to provide a fast concrete manufacturing apparatus and a method for manufacturing the fast concrete.
  • the present invention provides a fast-hard concrete manufacturing apparatus for producing fast-hard concrete through the air mixing and dissipation and the addition of crude steel mixture to the ordinary concrete,
  • a normal concrete forming unit which mixes water, cement, and aggregate at a predetermined ratio to form normal concrete
  • a bubble and crude mixed material input unit for adding bubbles and crude steel mixed material to the ordinary concrete to increase the slump of the ordinary concrete
  • the mixed concrete is mixed with the ordinary concrete and the air bubbles and the crude steel mixed material is mixed with the common concrete and the air bubbles and the crude steel mixed material while the bubble formed in the concrete concrete and the shaft formed inside the ready-mixed truck and the mixing member projecting on the shaft rotates by the power of the motor.
  • the fast concrete shorting portion for shortening the fast concrete to reduce the slump increased due to the bubble to the slump range of the ordinary concrete while blowing out the bubbles contained in the mixed concrete by blowing with high pressure air of 5 atm or more It is characterized by including the configuration.
  • the present invention the method of producing fast-hard concrete to produce fast-hard concrete by adding air mixing and dissipation and crude steel mixed material to the ordinary concrete,
  • the mixed concrete is mixed with the ordinary concrete and the air bubbles and the crude steel mixed material is mixed with the common concrete and the air bubbles and the crude steel mixed material while the bubble formed in the concrete concrete and the shaft formed inside the ready-mixed truck and the mixing member projecting on the shaft rotates by the power of the motor.
  • Mixed concrete forming step of forming
  • the mixed concrete in which the crude steel mixed material is well dispersed in the ordinary concrete is formed by using the ball bearing effect of bubbles and crude steel mixed material in ordinary concrete, and the mixed concrete is discharged.
  • the high-pressure air to reduce the excess air contained in the mixed concrete at the same time by reducing the slump significantly increased due to the large amount of bubbles in the concrete concrete slump range, the fast hardening can be secured You can have this advantage.
  • FIG. 6 is an enlarged photograph of the bubble slurry produced by FIG. 5
  • 15 is a slump photograph of the present invention fast-hard concrete
  • 17 is a graph of slump loss variable according to time of the mixed concrete of the present invention
  • FIG. 1 is a flowchart of the present invention
  • FIG. 2 is a schematic diagram of the present invention.
  • the fast-hard concrete manufacturing apparatus for producing fast-hard concrete through the mixing of air and dissipation and the addition of crude steel mixture to the normal concrete, the normal concrete forming unit to form a normal concrete by mixing water, cement, aggregate in a certain ratio ( 110 is configured, the bubble and the crude steel mixed material input unit 120 is configured to increase the slump of the ordinary concrete by injecting bubbles and crude steel mixed material into the ordinary concrete, the normal concrete, the normal concrete.
  • the mixed air bubbles and the crude steel mixed material is mixed with ordinary concrete and air bubbles and crude steel mixed materials while the shaft 131 formed inside the ready-mixed concrete truck 111 and the mixing member 132 protruding from the shaft 131 rotate with the power of a motor.
  • the mixed concrete forming unit 130 is formed to form a mixed concrete, and when the mixed concrete is discharged, it is blown with high pressure air of 5 atm or more
  • the slump increase caused by the bubble dissipation, while the bubbles contained in the mixed concrete is typically configured to include a hard concrete in a short tingbu 140 syotting in a hard concrete that reduced to a range of concrete slump.
  • the fast-hard concrete manufacturing apparatus for producing fast-hard concrete through the mixing of air, dissipation, and crude steel mixed materials in ordinary concrete
  • the normal concrete forming unit for forming the normal concrete by mixing water, cement, aggregate in a certain ratio 110 is configured, the bubble and the crude steel mixed material input unit 120 is configured to increase the slump of the ordinary concrete by injecting bubbles and crude steel mixed material into the ordinary concrete
  • the normal concrete, the normal concrete Mixed concrete forming unit for supplying the bubble and the crude steel mixed material is supplied to the movement guide member 134 through the hopper 133 and at the same time by mixing the normal concrete and the foam and the crude steel mixed material by the rotation of the screw 135 to form a mixed concrete 130 'is formed, and when the mixed concrete is discharged, bubbles contained in the mixed concrete are blown into the air of high pressure of 5 atm or more Dissipation, while the increase in slump due to air bubbles is typically configured to include a hard concrete in a short tingbu 140 syotting in a hard concrete that reduced
  • the bubble and the crude steel mixed material input unit 120 is preferably added to the bubble and the slurry sequentially or to the bubble slurry mixed with the bubble and the slurry.
  • the slurry is preferably produced by mixing the crude steel mixture material and water.
  • the crude steel mixture material is formed by mixing at least one or one or more of an alumina-based carbide tip clinker powder, an amorphous alumina-based carbide tip clinker powder, and an Arwin-based carbide tip clinker powder.
  • the crude concrete expresses 21 MPa compressive strength, which is a practical strength within 3 days after mixing with water, and the crude steel mixed material is mixed at 5 to 20 parts by weight based on 100 parts by weight of cement, which usually forms concrete.
  • the super rough steel concrete expresses 21 MPa compressive strength, which is a practical strength within 1 day after mixing with water, and the crude steel mixed material is mixed with 15 to 25 parts by weight based on 100 parts by weight of cement, which usually forms concrete.
  • the superhard concrete expresses 21 MPa compressive strength, which is a practical strength within 3 hours after mixing with water, and the crude steel mixed material is mixed at 25 to 40 parts by weight based on 100 parts by weight of cement, which usually forms concrete.
  • the bubble is generated by any one of a foaming agent, a bubble generator, and a foaming agent, and is mixed so as to be 20 to 40% based on the normal concrete 100 basis.
  • the antifoaming agent is added to reduce the excessive bubbles in terms of strength and slump of fast-hard concrete.
  • the fast concrete shorting part 140 is provided with a shorting guide member 141, which is formed to be detachably mounted to the mixed concrete forming part and has a diameter smaller in the center than both ends thereof penetrated therein so that the mixed concrete is compressed and discharged. And an air supply hole 142 for supplying high pressure air of 5 atm or more to dissipate bubbles contained in the mixed concrete that is penetrated by the shorting guide member 141 and moved to the shorting guide member 141. It is provided including.
  • the air supply hole 142 is radially inclined to the outer circumferential surface of the shorting guide member 141.
  • the ordinary concrete of 40mm or less of slump is transferred to the construction site by a dump truck.
  • At least one of the alumina-based cemented carbide clinker powder, amorphous alumina-based cemented carbide clinker powder, Irwin-based cemented carbide clinker powder from the bubble and the crude steel mixed material input unit 120 or A slurry is produced by mixing the crude steel mixture material formed by mixing one or more with water in a ratio of 1: 1, and the slurry produced by mixing the bubbles produced by the foaming agent and the bubble generator to form a bubble slurry, and then put into ordinary concrete.
  • the bubble slurry is preferably mixed by mixing 1 kg of crude steel mixture material: 8 to 10 L of air bubbles, but preferably considering the strength and slump of the final fast-hard concrete.
  • the foaming agent is a method of injecting bubbles made from the outside into the ordinary concrete already blended, usually diluted with 30 to 50 times of water to obtain a volume of air up to about 80 as a mixed material to physically introduce bubbles by the surface active action
  • the effective amount of bubbles in the present invention preferably contains 20 to 40% of the air compared to the entire fast-hard concrete, the bubble has a shape close to the spherical shape and the size of the fine bubbles present in the range 0.01 ⁇ 0.3mm Is preferred.
  • the bubble may be generated as a blowing agent, which is usually added to concrete and stirred, and generates bubbles in the process of remixing, which is formed by the high speed rotation of the mixer. Although the distribution is relatively uniform, a large difference occurs in the amount of bubble generation depending on the mixing time.
  • the foaming agent is aluminum powder, it is preferable to use 0.1 ⁇ 0.5% of the entire fast-hard concrete.
  • FIG. 6 An enlarged photograph of the bubble slurry containing the bubble and the crude steel mixture material is shown in FIG. 6, and the size of the bubble A contained in the bubble slurry is about 0.1 to 1 mm while the crude steel mixture material (S) is formed between the bubbles. ) Are evenly distributed.
  • the bubble slurry in which the bubbles and the slurry are mixed is added to ordinary concrete.
  • the bubbles and the slurry may be sequentially added to the normal concrete.
  • a crude steel mixture material formed by mixing at least one or at least one of air bubbles, alumina-based carbide tip clinker powder, amorphous alumina-based carbide tip clinker powder, and Awin-based carbide tip clinker powder without mixing the slurry. It can be put in.
  • the crude steel concrete expressing 21 MPa compressive strength within 3 days is formed by mixing 5 to 20 parts by weight of the crude steel mixed material based on 100 parts by weight of the cement to form the ordinary concrete, expressing 21 MPa compressive strength within 1 day
  • the super rough steel concrete is formed by mixing 15 to 25 parts by weight of the crude steel mixed material based on 100 parts by weight of the cement to form the ordinary concrete, and the superhard concrete expressing 21 MPa compressive strength within 3 hours forms the ordinary concrete. It is formed by mixing 25 to 40 parts by weight of the crude steel mixed material based on 100 parts by weight of cement, which is less than the above range, the high strength and high durability is lower, and when it is larger than the above range, the high strength and high durability is not shown higher This is because city parks rise.
  • the mixing ratio is usually mixed with 300 ⁇ 400l of bubble slurry per 1m3 of concrete so that 30 to 35% of the bubble content is contained in the mixed concrete.
  • the mixed concrete forming unit 130 may include at least one shaft 131 formed inside the ready-mixed concrete truck 111 at the same time as the shaft 131 rotates with the power of a motor.
  • the mixing member 132 formed radially or more rotates, the mixture of ordinary concrete and bubble slurry or bubble and crude steel mixture or foaming agent and crude mixture is mixed with the crude steel mixture material well dispersed in ordinary concrete by using the ball bearing effect of bubbles. To form concrete.
  • the slump 40mm or less of the concrete is transported to the dump truck is supplied to the movement guide member 134 through the hopper 133 of the mixed concrete forming unit 130 'and at the same time the movement guide member
  • the normal concrete supplied to the 134 moves along the movement guide member 134 by the rotation of the screw 135, and bubbles and crude steel mixed material input unit 120 moves on the normal concrete moving along the movement guide member 134.
  • bubble and crude steel mixed material are added, and the ordinary concrete and the crude steel mixed material are mixed by the rotation of the screw 135.
  • the bubble and the crude steel mixed material can be added separately, but since the mixing time of the bubble and the crude steel mixed material and the normal concrete according to the rotation of the screw 135 is short, it is preferable to add the bubble slurry to the normal concrete.
  • the mixed concrete forming unit 130 ′ is a vertical stirring mixer, which is formed to be inclined so that the outlet side is higher than the inlet side so that bubble slurry and ordinary concrete are easily mixed by the height difference of the mixing member 135. do.
  • Figure 10 shows the slump of the normal concrete, the mixing ratio of water, cement, aggregate, etc. used for the normal concrete is generally in accordance with the standard compounding ratio widely used, showing a slump 0mm state
  • Figure 11 It shows that the slump of ordinary concrete after the bubble slurry is blended is 230 mm. That is, FIG. 10 shows that the amount of air present in the normal concrete before the bubble slurry is blended is 3%. However, FIG. 11 shows that the amount of air present in the normal concrete in which the bubble slurry is blended is 26%.
  • the present invention as shown in Figure 12 to 13, to add a defoaming agent to the mixed concrete in order to reduce the amount of air contained in the mixed concrete mixed in the mixed concrete forming unit 130, 130 ' Or shortening is performed by the fast concrete shortening unit 140.
  • the antifoam agent is a substance that suppresses the generation of air bubbles used for the purpose of removing and controlling air bubbles mixed so as to evenly disperse the crude steel mixture material in ordinary concrete. V), and suppressing the generation of bubbles from the beginning is called suppression, and in the present invention, it can be used as a defoamer for the purpose of removing the excessive bubbles already present.
  • antifoaming agents used in the mixed concrete, it is preferable to mix 0.1 to 2.0 parts by weight based on 100 parts by weight of fast-hard concrete.
  • the mixed concrete forming part 130 is detachably attached to the ready-mixed concrete truck 111 or the moving guide member 134 of the mixed concrete forming part 130 ′. It is supplied to the inlet of the installed shorting guide member 141.
  • the diameter of the central portion is smaller than both ends of the inlet and the outlet through which the shorting guide member 141 penetrates inside, the mixed concrete supplied to the shorting guide member 141 is compressed to generate pressure.
  • the mixed concrete passes through the central portion of the shorting guide member 141 to the outlet larger than the diameter of the central portion at the same time the compressed air of high pressure or more than 5 atm shorting guide member 141 While supplied to the air supply hole 142 is formed to be inclined radially on the outer peripheral surface of the shorting guide member 141 is vortexed by the outlet of the shorting, the compressed air and mixed concrete is spread by the spray method as well as the compressed air and mixed concrete While colliding, a large amount of bubbles contained in the mixed concrete is dissipated.
  • the amount of bubbles contained in the mixed concrete in which the bubbles are dissipated is not only close to the range of the amount of air contained in the ordinary concrete before mixing the bubble slurry, but also reduces the amount of air contained in the mixed concrete to 3-7% while reducing the amount of air contained in the mixed concrete. It can be shortened to fast-hard concrete to ensure workability, high strength and high durability.
  • the basic properties and durability of the fast-hard concrete were measured according to KS regulations and ASTM, and the detailed outline thereof is shown in Table 1, and as shown in FIGS. 16 to 17, the slump loss test was not performed while measuring at intervals of 5 minutes. , Continuous stirring of the mixed concrete, slump loss test results for the mixed concrete containing the crude steel mixed material and bubbles, after about 15 to 20, the slump drop of less than 200mm occurs, about 30 to 35 minutes Afterwards, it can be seen that most of the mixed concrete appears to lose fluidity.
  • the condensation experiment of mixed concrete as shown in Figure 17 and Table 2, as a result of the condensation experiment on the mixed concrete, the RHA-20% variable was found to be the initial 68 minutes, the termination 98 minutes, the RHA -30% variable 59 minutes were concluded and 76 minutes were terminated.
  • the RHA-30% (AB) variable it can be seen that the settling delay is significantly increased compared to the conventional formulation.
  • the compressive strength of mixed concrete as shown in Fig. 18, satisfies more than 12 hours 21MPa only in the RHA-30% variable, and satisfies more than 21MPa in all the variables after 1 day, and RHA-30% having a large coagulation delay.
  • the variable (AB) shows strength characteristics similar to those of RHA-20%.
  • the present invention although the alumina-based super-speed clinker powder, amorphous alumina-based super-speed clinker powder, and Awin-based super-speed clinker powder, etc. as an example of the crude steel mixture material in the above embodiment, but exhibits the properties of fast-hardening in addition to the crude steel mixture
  • the manufacturing apparatus and the manufacturing method of the present invention can be applied to other crude steel mixture material that is economically recognized.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

La présente invention porte sur un appareil pour la production de béton à durcissement rapide et sur son procédé de production, le béton à durcissement rapide étant produit par mélange et dissipation d'air dans du béton normal et ajout à ce dernier d'un adjuvant conférant une haute résistance initiale. En ce qui concerne la formation de béton à durcissement rapide, du béton mélangé est formé par ajout et mélange d'un grand volume de bulles d'air destinées à être ensuite évacuées, avec un adjuvant conférant une haute résistance initiale, à du béton normal déjà mélangé, l'adjuvant conférant une haute résistance initiale étant amené à être dispersé de façon égale dans ce dernier au moyen de l'effet de roulement à billes des bulles d'air, et lorsque le béton mélangé est déchargé, un béton à durcissement rapide est projeté alors que l'air en excès contenu dans le béton mélangé est dissipé au moyen d'air à haute pression, l'affaissement qui était monté en raison de la grande quantité de bulles d'air ayant été réduit à la plage d'affaissement du béton normal.
PCT/KR2014/011981 2013-12-10 2014-12-08 Appareil pour la production de béton à durcissement rapide par mélange et dissipation d'air dans du béton normal et ajout à ce dernier d'adjuvant conférant une haute résistance initiale, et son procédé de production WO2015088203A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201480075265.6A CN105992681B (zh) 2013-12-10 2014-12-08 基于对普通混凝土进行空气混入和消除及早强混合材料添加的制作快硬混凝土的快硬混凝土制作装置及其的制作方法
US15/103,269 US10207233B2 (en) 2013-12-10 2014-12-08 Apparatus for producing rapid-hardening concrete by intermixing and dissipating air in normal concrete and adding early-strength admixture thereto, and method for producing same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2013-0153232 2013-12-10
KR20130153232 2013-12-10
KR10-2014-0174606 2014-12-08
KR1020140174606A KR101614119B1 (ko) 2013-12-10 2014-12-08 보통콘크리트에 공기 혼입과 소산 및 조강혼합재료 첨가를 통한 속경성 콘크리트를 제조하는 속경성 콘크리트 제조장치 및 이의 제조방법

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938786A (en) * 1972-12-04 1976-02-17 Jean Bernold Apparatus for wet spraying of concrete
KR20000055032A (ko) * 1999-02-02 2000-09-05 정순착 현장 타설용 경량기포콘크리트 제조장치
KR20050087029A (ko) * 2004-02-24 2005-08-31 (주) 지오시스 단열성능이 우수한 현장 타설용 조강형 기포 콘크리트 및이의 제조방법
JP2007145652A (ja) * 2005-11-29 2007-06-14 Denki Kagaku Kogyo Kk 超速硬・高流動セメント組成物及びそれを用いたモルタル又はコンクリート
JP2007297250A (ja) * 2006-05-02 2007-11-15 Denki Kagaku Kogyo Kk 超速硬セメント組成物、超速硬モルタル組成物、及び超速硬グラウトモルタル
KR101133569B1 (ko) * 2009-09-30 2012-04-05 강상수 폴리머 모르타르 조성물의 분사장치, 및 이를 이용한 콘크리트 구조물의 보수공법

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938786A (en) * 1972-12-04 1976-02-17 Jean Bernold Apparatus for wet spraying of concrete
KR20000055032A (ko) * 1999-02-02 2000-09-05 정순착 현장 타설용 경량기포콘크리트 제조장치
KR20050087029A (ko) * 2004-02-24 2005-08-31 (주) 지오시스 단열성능이 우수한 현장 타설용 조강형 기포 콘크리트 및이의 제조방법
JP2007145652A (ja) * 2005-11-29 2007-06-14 Denki Kagaku Kogyo Kk 超速硬・高流動セメント組成物及びそれを用いたモルタル又はコンクリート
JP2007297250A (ja) * 2006-05-02 2007-11-15 Denki Kagaku Kogyo Kk 超速硬セメント組成物、超速硬モルタル組成物、及び超速硬グラウトモルタル
KR101133569B1 (ko) * 2009-09-30 2012-04-05 강상수 폴리머 모르타르 조성물의 분사장치, 및 이를 이용한 콘크리트 구조물의 보수공법

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