KR101272277B1 - Method of manufacturing the rapid formation of aggregates and particulates - Google Patents

Method of manufacturing the rapid formation of aggregates and particulates Download PDF

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KR101272277B1
KR101272277B1 KR20120126906A KR20120126906A KR101272277B1 KR 101272277 B1 KR101272277 B1 KR 101272277B1 KR 20120126906 A KR20120126906 A KR 20120126906A KR 20120126906 A KR20120126906 A KR 20120126906A KR 101272277 B1 KR101272277 B1 KR 101272277B1
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mixture
weight
fine particle
injection material
powder
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Korean (ko)
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박명규
유용선
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(주)케미우스코리아
서진이엔씨(주)
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K17/00—Soil-conditioning materials or soil-stabilising materials
    • C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
    • C09K17/10—Cements, e.g. Portland cement
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/30—Oxides other than silica
    • C04B14/303—Alumina
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • C04B18/141—Slags
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
    • C04B22/142—Sulfates
    • C04B22/143—Calcium-sulfate
    • 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
    • C04B28/04—Portland cements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
    • 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
    • C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Paleontology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

PURPOSE: A manufacturing method of fine particle grout and a quick hardening admixture is provided to secure stability of an initial displacement from a weak soil foundation tunnel digging construction to raise the initial strength of the grout by mixing the compositions of the quick hardening admixture and fine particle grout at an optimal combination ratio. CONSTITUTION: A manufacturing method of quick hardening admixture and fine particle grout comprises the following steps. (a) Bauxite whose content of aluminum trioxide Al2O3 is 80% or greater, anhydrous gypsum of which calcium sulfate(CaSO4) is combined without water, and calcium oxide(CaO) mixed in a mass rate of 12:10:3. (b) Mixture of the step(b) is quickly cooled by fusing at 1,000-1,100°C. (c) Mixture of the step(c) is pulverized into 3,000-5,000cm/g and produces quick hardening admixture. (d) A mixture is produced by mixing the quick hardening admixture powder, Portland cement, and blast furnace slag powder with a mass rate of 1:5:4. (e) The mixture is first pulverized to 5,500-6,500cm/g and produce fine particle grout by processing the first pulverized powder with the second pulverized to 7,500-8,500cm/g.

Description

급경성 혼합재와 미립자 주입재의 제조방법{method of manufacturing the rapid formation of aggregates and particulates}Method of manufacturing the rapid formation of aggregates and particulates

본 발명은 급경성 혼합재와 미립자 주입재의 제조방법에 관한 것으로, 특히 토사층, 연약지반이나 용수부위의 터널 굴착시 보조공법으로 시행되는 그라우팅에 있어서, 칼슘알루미네이트를 주성분으로 하는 급경성 혼합재와 미립자 주입재를 사용하여 우수한 침투효과를 기대함과 동시에 초기에 높은 강도를 발휘하여 연약지반 터널의 초기 안정성을 기대할 수 있는 급경성 혼합재와 미립자 주입재의 제조방법에 관한 것이다.The present invention relates to a method for producing a rigid mixture and fine particle injection material, particularly in grouting carried out as an auxiliary method during the excavation of tunnels in the soil layer, soft ground or water parts, the radical mixture and calcium particle injection material composed mainly of calcium aluminate The present invention relates to a method for producing a rigid mixture and a fine particle injection material, which can be expected to provide excellent penetration effect and at the same time exhibit high strength at the initial stage of the soft ground tunnel.

본 발명의 명세서에서 상기 초기 안정성을 기대하는 급경성 혼합재와 미립자 주입재의 혼합물을 "R.M.G(Rapid hardening Multi Grouting)조성물"이라 하고, 상기 급경성 혼합재와 미립자 주입재의 혼합물을 이용한 지반보강 주입공법을 "R.M.G(Rapid hardening Multi Grouting)공법"이라 한다.In the specification of the present invention, the mixture of the hard mixture and the particulate injecting material which is expected to have the initial stability is referred to as "RMG (Rapid hardening multi-grouting) composition", and the ground reinforcement injection method using the mixture of the hard mixture and the particulate injecting material is " RMG (Rapid hardening Multi Grouting) method is called.

일반적으로 토사나 풍화토 또는 저토피 구간의 터널 건설 시 굴착 보조 공법으로 사용되는 강관 다단이나 지반보강공법에는 주요 공정으로 그라우팅(grouting) 공정이 터널 건설 시 안정성 확보를 위해 사용되고 있다.In general, the grouting process is used to secure stability when constructing tunnels in steel pipe multi-stage or ground reinforcement methods, which are used as excavation aids when constructing tunnels in soil, weathered soil, or low toffee sections.

그러나 최근까지 국내에서 사용되는 그라우팅 방법은 분말도가 2,800∼3,400㎠/g의 보통 포틀랜드시멘트를 물-시멘트비 168∼300% 주입하는 방법을 사용하고 있다.However, until recently, the grouting method used in Korea has used a method of injecting a normal portland cement having a powder level of 2,800 to 3,400 cm 2 / g into a water-cement ratio of 168 to 300%.

하지만, 상기한 보통 포틀랜드시멘트만 주입재로 사용할 경우에는 시멘트가 경화하여 발현하기까지 수일에서 수십 일이 소요되어 조기에 안정성을 기대하기가 어렵다.However, when only the above-mentioned ordinary portland cement is used as the injection material, it takes several days to several tens of days for the cement to harden and it is difficult to expect stability early.

이에 이산화규소(SiO2)와 알칼리의 혼합물인 규산화알칼리염을 주원료로 한 규산소다 즉, 물유리(water glass)를 주로 사용하여, 초기 겔 형성과 조기강도를 확보할 수 있었다. Therefore, it was possible to secure initial gel formation and early strength by mainly using silicon silicate, which is a mixture of silicon dioxide (SiO 2 ) and alkali, and silicon silicate, that is, water glass.

그러나 상기한 규산소다는 Na2OㆍnSiO2(n=2~4)를 주성분으로 하기 때문에 지하수가 있는 부위에 사용되었을 경우 경화체가 수축하거나, Na, Si 이온이 용탈되는 현상으로 작업 기간 내 내구성을 기대하기가 어려운 단점이 있다.However, since sodium silicate is mainly composed of Na 2 O · nSiO 2 (n = 2 ~ 4), when it is used in a part with groundwater, the hardened body contracts or Na, Si ions are leached out, which leads to durability in working period. It is difficult to expect.

현재까지 이러한 단점을 보완하고자 시멘트계 급결재와 규산소다를 변형한 합성실리카 계열의 급결재의 연구가 활발히 진행되었다. To this end, researches on cement-based fasteners and synthetic silica-based fasteners modified with sodium silicate have been actively conducted.

그러나 현재까지 개발된 연구에서는 규산소다의 용탈 문제를 해결한 무기계, 합성실리카 재료가 연구되어 겔 타임과 용탈 문제를 해결하였다.However, in the researches developed to date, inorganic and synthetic silica materials that solve the problem of dissolution of sodium silicate have been studied to solve the gel time and leaching problem.

그러나 실제로 그라우팅 작업에는 높은 물-시멘트비(중량비율 168~ 300%)의 슬러리(slurry) 형태로 주입재가 사용되어 초기(1시간, 3시간, 6시간, 12시간 등)에 강도 발현이 증진되지 않아서 토사 및 풍화토 등의 초기 하중이 발생하거나 변위가 크게 발생하는 조건에서의 안정성에 문제가 제기되어 왔다.In practice, however, the grouting process uses injection materials in the form of slurries with a high water-cement ratio (weight ratio of 168 to 300%), so that strength development is not enhanced initially (1 hour, 3 hours, 6 hours, 12 hours, etc.). Problems have arisen in the stability under conditions in which initial loads such as soil and weathered soil are generated or displacement is large.

이에, 본 발명은 상기한 바와 같은 제문제점을 해결하기 위해 안출된 것으로, 터널 굴착용 보조공법으로 사용되는 그라우팅 공정에서 사용되는 주입재의 초기강도(1시간, 3시간) 강도를 기존 주입재의 재령 28일 이상의 강도를 발현하여, 연약지반 터널 굴착 공사에서 초기 변위에 대한 안정성을 확보하며, 경화체의 용탈이 없고, 장기 강도(재령 28일 강도)의 안정적인 발현을 통해 경화체의 내구성을 확보하도록 한 급경성 혼합재와 미립자 주입재의 제조방법을 제공하는데 목적이 있다. Accordingly, the present invention has been made to solve the problems described above, the initial strength (1 hour, 3 hours) of the injection material used in the grouting process used as a tunnel drilling auxiliary method of reinforcement of the existing injection material 28 Rapid rigidity to express more than one strength, to ensure stability against initial displacement in soft ground tunnel excavation construction, no dissolution of hardened body, and secure durability of hardened body through stable expression of long-term strength (age 28 days) It is an object of the present invention to provide a method for producing a mixture and a particulate injection material.

이와 함께, 주입용 주재료로 미립화된 주입재를 사용하여 침투성능을 증대시켜 안정적인 주입재를 제공하는데 다른 목적이 있다.Along with this, another purpose is to provide a stable injection material by increasing the penetration performance by using the atomized injection material as a main material for injection.

상기한 목적을 달성하기 위한 본 발명에 따른 급경성 혼합재와 미립자 주입재의 제조방법은 삼산화알루미늄 Al2O3의 함유량이 80% 이상인 수산화알루미늄광물(보크사이트, Bauxite)과 결정수를 갖지 않은 황산칼슘염(Calcium Sulfate, CaSO4)인 무수석고(anhydrous gypsum)와 산화칼슘(CaO)을 12:10:3의 중량비율로 혼합하여 1,000 ~ 1,100℃의 온도에서 용융하여 급랭한 후, 분말도 3,000~5,000㎠/g로 분쇄하여 분말화하여 급경성 혼합재를 제조하는 단계; 상기 급경성 혼합재 분말과 포틀랜드시멘트와 고로슬래그 분말을 1:5:4의 중량비율로 혼합하여 혼합물을 제조하는 단계; 상기 혼합물을 분말도 5,500~6,500㎠/g가 되도록 1차 분쇄하고, 2차로 분말도 7,500~8,500㎠/g로 분쇄하여 미립자 주입재를 제조하는 단계로 이루어짐을 특징으로 한다.In order to achieve the above object, the method for preparing the steep mixture and the particulate injecting material according to the present invention is an aluminum hydroxide mineral (voxite, Bauxite) having a content of aluminum trioxide Al 2 O 3 or more and calcium sulfate having no crystal water. Anhydrous gypsum, calcium salt (Calcium Sulfate, CaSO 4 ) and calcium oxide (CaO) are mixed at a weight ratio of 12: 10: 3, melted and quenched at a temperature of 1,000 to 1,100 ° C, and then the powder is 3,000 to Pulverizing at 5,000 cm 2 / g to powder to prepare a rigid mixture; Preparing a mixture by mixing the rapid mixture powder, the portland cement, and the blast furnace slag in a weight ratio of 1: 5: 4; The mixture is first pulverized to have a powder degree of 5,500 to 6,500 cm 2 / g, and the powder is secondly pulverized to 7,500 to 8,500 cm 2 / g to prepare a particulate injection material.

이상에서 설명한 바와 같이, 본 발명에 따른 급경성 혼합재와 미립자 주입재의 제조방법은 급경성 혼합재와 미립자 주입재의 조성물 및 배합비에 따라 지반 보강용 주입재의 초기(1시간, 3시간) 강도가 종래 주입재의 재령 28일 이상의 강도 발현이 가능하여 초기 지반 변위에 대한 안정성을 기대할 수 있다. As described above, according to the present invention, the method of preparing the rigid mixture and the particulate injecting material has the initial (1 hour, 3 hours) strength of the ground reinforcing filler according to the composition and the mixing ratio of the rigid mixture and the particulate injecting material. At least 28 days of strength can be developed and stability against initial ground displacement can be expected.

이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.

본 발명에 따른 급경성 혼합재와 미립자 주입재의 제조방법은 삼산화알루미늄 Al2O3의 함유량이 80% 이상인 수산화알루미늄광물(보크사이트, Bauxite)과 결정수를 갖지 않은 황산칼슘염(Calcium Sulfate, CaSO4)인 무수석고(anhydrous gypsum)와 산화칼슘(CaO)을 12:10:3의 중량비율로 혼합하여 1,000 ~ 1,100℃의 온도에서 용융하여 급랭한 후, 분말도 3,000~5,000㎠/g로 분쇄하여 분말화하여 급경성 혼합재를 제조하는 단계; 상기 급경성 혼합재 분말과 포틀랜드시멘트와 고로슬래그 분말을 1:5:4의 중량비율로 혼합하여 혼합물을 제조하는 단계; 상기 혼합물을 분말도 5,500~6,500㎠/g가 되도록 1차 분쇄하고, 2차로 분말도 7,500~8,500㎠/g로 분쇄하여 미립자 주입재를 제조하는 단계로 이루어진다.According to the present invention, the method for preparing the steep mixture and the fine particle injection material includes aluminum hydroxide mineral (Bouxite, Bauxite) having an aluminum trioxide Al 2 O 3 content of 80% or more and calcium sulfate salt having no crystal water (Calcium Sulfate, CaSO 4). ) Anhydrous gypsum and calcium oxide (CaO) are mixed at a weight ratio of 12: 10: 3, melted and quenched at a temperature of 1,000 to 1,100 ° C, and the powder is also pulverized to 3,000 to 5,000㎠ / g. Powdering to prepare a rigid mixture; Preparing a mixture by mixing the rapid mixture powder, the portland cement, and the blast furnace slag in a weight ratio of 1: 5: 4; The mixture is first pulverized so that the powder is 5,500 ~ 6,500 cm 2 / g, and the powder is secondly pulverized to 7,500 ~ 8,500 cm 2 / g to prepare a particulate injection material.

여기서, 상기 급경성 혼합재 100중량%에 대하여 응결조정제 0.1∼1.5중량%를 첨가하되, 상기 응결조정제는 시트릭산 50∼60중량%, 쇼듐염 10∼20중량%, 칼슘염 20∼30중량%로 구성된다.Here, 0.1 to 1.5% by weight of a coagulation modifier is added to 100% by weight of the rapid mixture, wherein the coagulant is 50 to 60% by weight of citric acid, 10 to 20% by weight of sodium salt, and 20 to 30% by weight of calcium salt. It is composed.

즉, 상기 급경성 혼합재 100중량%에 대하여 시트릭산 50∼60중량%, 쇼듐염 10∼20중량%, 칼슘염 20∼30중량%로 구성된 응결조정제 0.1∼1.5중량%를 함께 사용하여, 그라우팅 작업에 소요되는 작업 가능 시간(workable time)을 확보하는 지연효과와 적정 작업 시간 이후에는 강도 증진에 도움이 되는 촉진제(accelerator)로써의 역할을 하는 최적의 효과를 얻도록 한다.That is, grouting operation is performed using 0.1 to 1.5% by weight of a coagulation modifier composed of 50 to 60% by weight of citric acid, 10 to 20% by weight of sodium salt, and 20 to 30% by weight of calcium salt with respect to 100% by weight of the rigid mixture. The delay effect of securing the workable time required for the work and the optimum effect of acting as an accelerator to help increase the strength after the proper working time are obtained.

또한, 상기 미립자 주입재 100중량%에 물의 혼합비율은 80∼300중량%로 구성된다.
상기 미립자 주입재 100중량%에 나프탈렌설포네이트 나트륨염의 분산제를 0.5∼2.0중량%를 첨가한다.In addition, the mixing ratio of water to 100% by weight of the fine particle injection material is composed of 80 to 300% by weight.
0.5 to 2.0 wt% of a dispersant of naphthalenesulfonate sodium salt is added to 100 wt% of the fine particle injection material.

즉, 상기 미립자 주입재의 침투 효과를 극대화하기 위해 나프탈렌설포네이트 나트륨염을 분산제로 미립자 주입재 100중량%에 0.5∼2.0중량%로 사용함으로써 미립자의 입자가 정전기 반응으로 인해 뭉치는 현상을 방지하여 주입재의 지반 내에서 침투 성능을 극대화한다.That is, by using naphthalenesulfonate sodium salt as a dispersant in an amount of 0.5 to 2.0% by weight to 100% by weight of the particle injection material in order to maximize the penetration effect of the particle injection material to prevent the particles of the particles agglomeration due to the electrostatic reaction of the injection material Maximizes penetration performance in the ground.

또한, 본 발명은 급경성 혼합재, 미립자 주입재, 응결조정제와 분산제를 적정한 중량비율로 사용함으로써 겔 타임을 1∼3분의 완결형과 5∼15초의 급결형, 30분 이상의 초 완결형의 다양한 형태로 조절할 수 있어 다양한 조건하에서 현장여건에 부합하게 사용할 수 있다. In addition, the present invention uses a rigid mixture, fine particle injection, a coagulant modifier and a dispersant in an appropriate weight ratio, various types of gel time of 1 to 3 minutes, 5 to 15 seconds, 30 minutes or more It can be used to meet the site conditions under various conditions.

특히, 급경성 혼합재와 미립자 주입재를 각 물과 100중량%로 혼합한 각각의 슬러리에 중량비율 1:1로 혼합하여 경화체를 제조할 경우 1시간에 41kgf/㎠, 3시간에 85kgf/㎠의 일축 압축강도 발현이 되어 1시간에 종래 주입재의 재령 28일 일축 압축강도에 보다 높은 결과를 얻을 수 있어, 연약지반 터널 시공 시 안정성의 확보와 조기 굴착으로 인한 시공 비용을 절감할 수 있다. In particular, when preparing a cured product by mixing the rigid mixture and the particulate injection material with each water mixed with 100% by weight in a weight ratio of 1: 1, 41 kgf / cm 2 per hour and 85 kgf / cm 2 per hour The compressive strength is expressed, and thus, a higher result can be obtained in the uniaxial compressive strength of 28 days of conventional injection materials in one hour, thereby reducing the construction cost due to securing stability and early excavation when constructing soft ground tunnels.

분말도가 7,500㎠/g의 미립자 주입재와 물을 200중량%, 분산제를 미립자 주입재 0.5중량%로 혼합한 슬러리만을 주입재로 사용한 경화체의 경우에도 12시간 16kgf/㎠의 일축 압축강도 발현되어, 급경성 혼합재를 사용하지 않는 간편한 주입 방식인 1.0shot 형태의 시공방법에 적용이 가능하며, 조기에 높은 강도 발현이 가능하여, 침투성능이 요구되는 지반에서의 그라우팅의 적용 범위가 확대될 수 있다.In the case of a cured product using only a slurry having a powder level of 7,500 cm 2 / g and a slurry containing 200% by weight of water and 0.5% by weight of a particle injection material as the injection material, the uniaxial compressive strength of 16 kgf / cm 2 was expressed for 12 hours. It can be applied to the 1.0shot type construction method, which is a simple injection method without using a mixed material, and can express high strength at an early stage, so that the application range of grouting on the ground requiring penetration performance can be expanded.

또한, 주입재와 물이 분리되는 블리딩(bleeding) 현상이 부피 비율 기준 3%로 종래 급결재를 사용하지 않은 주입재보다 대단히 낮기 때문에 주입재의 주입 후 블리딩 현상으로 인한 체적 감소 효과 방지가 가능하여 확실한 보강 효과를 기대할 수 있다.In addition, since the bleeding phenomenon in which the injection material and the water are separated is much lower than the injection material without using the conventional quickener at a volume ratio of 3%, it is possible to prevent the volume reduction effect due to the bleeding phenomenon after the injection of the injection material, thereby ensuring a reinforcement effect. You can expect.

본 발명에 따른 급경성 혼합재와 미립자 주입재 등의 각 재료의 혼합시 중량비를 조절할 경우 겔 타임의 조정이 가능하여 다양한 형태의 주입 방식에 적합하며 종래의 주입 장비를 사용할 수 있으므로 경제적인 시공이 가능할 것을 기대할 수 있다.When adjusting the weight ratio when mixing the materials such as the rigid mixture and the particulate injection material according to the present invention, the gel time can be adjusted to suit various types of injection methods, and the conventional injection equipment can be used, so that economical construction is possible. You can expect

Claims (5)

삼산화알루미늄 Al2O3의 함유량이 80% 이상인 수산화알루미늄광물(보크사이트, Bauxite)과 결정수를 갖지 않은 황산칼슘염(Calcium Sulfate, CaSO4)인 무수석고(anhydrous gypsum)와 산화칼슘(CaO)을 12:10:3의 중량비율로 혼합하여 1,000 ~ 1,100℃의 온도에서 용융하여 급냉한 후, 분말도 3,000~5,000㎠/g로 분쇄하여 분말화하여 급경성 혼합재를 제조하는 단계;
상기 급경성 혼합재 분말과 포틀랜드시멘트와 고로슬래그 분말을 1:5:4의 중량비율로 혼합하여 혼합물을 제조하는 단계;
상기 혼합물을 분말도 5,500~6,500㎠/g가 되도록 1차 분쇄하고, 2차로 분말도 7,500~8,500㎠/g로 분쇄하여 미립자 주입재를 제조하는 단계로 이루어짐을 특징으로 하는 급경성 혼합재와 미립자 주입재의 제조방법.Aluminum hydroxide minerals (Boxite, Bauxite) with an aluminum trioxide Al 2 O 3 content of 80% or more, anhydrous gypsum and calcium oxide (CaO), calcium sulfate salt (Calcium Sulfate, CaSO 4 ) Mixing 12 to 10: 3 by weight to melt at a temperature of 1,000 to 1,100 ° C., quenching and pulverizing the powder to 3,000 to 5,000 cm 2 / g to prepare a hard mixture;
Preparing a mixture by mixing the rapid mixture powder, the portland cement, and the blast furnace slag in a weight ratio of 1: 5: 4;
The mixture is first pulverized to a powder degree of 5,500 ~ 6,500 cm 2 / g, and the powder is secondly pulverized to 7,500 ~ 8,500 cm 2 / g to prepare a particulate injection material of the rigid mixture and particulate injection material, characterized in that Manufacturing method. 제1항에 있어서,
상기 급경성 혼합재 100중량%에 대하여 응결조정제 0.1∼1.5중량%를 첨가함을 특징으로 하는 급경성 혼합재와 미립자 주입재의 제조방법.The method of claim 1,
A method of producing a hard mixture and fine particle injection material characterized by adding 0.1 to 1.5% by weight of a coagulation modifier to 100% by weight of the hard mixture. 제2항에 있어서,
상기 응결조정제는 시트릭산 50∼60중량%, 쇼듐염 10∼20중량%, 칼슘염 20∼30중량%로 구성됨을 특징으로 하는 급경성 혼합재와 미립자 주입재의 제조방법.The method of claim 2,
The coagulation modifier is 50 to 60% by weight of citric acid, 10 to 20% by weight of sodium salt, 20 to 30% by weight of calcium salt, the method of producing a rigid mixture and fine particle injection material. 제1항에 있어서,
상기 미립자 주입재 100중량%에 물의 혼합 비율은 80∼300중량%로 구성됨을 특징으로 하는 급경성 혼합재와 미립자 주입재의 제조방법.The method of claim 1,
The mixing ratio of water to 100% by weight of the fine particle injection material is 80 to 300% by weight of the manufacturing method of the hard mixed material and the fine particle injection material. 제4항에 있어서,
상기 미립자 주입재 100중량%에 나프탈렌설포네이트 나트륨염의 분산제를 0.5∼2.0중량%를 첨가함을 특징으로 하는 급경성 혼합재와 미립자 주입재의 제조방법. 5. The method of claim 4,
A method for producing a hard mixture and fine particle injection material, characterized in that 0.5 to 2.0% by weight of a dispersing agent of naphthalenesulfonate sodium salt is added to 100% by weight of the fine particle injection material.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07309658A (en) * 1994-05-12 1995-11-28 Nittetsu Cement Co Ltd Grout material
KR20070088975A (en) * 2006-02-27 2007-08-30 소양섭 A manufacturing process of prepackaged repairing materials using rapid setting agent composite by inorganic alkali and cementious)
KR101074258B1 (en) 2011-07-05 2011-10-17 주식회사 유니온 Cement mineral based accelerating agent used amorphous calcium aluminate made by water cooling method and manufacturing method thereof
KR101149343B1 (en) 2011-08-26 2012-05-29 동부엔지니어링 주식회사 Composition of slow setting cement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07309658A (en) * 1994-05-12 1995-11-28 Nittetsu Cement Co Ltd Grout material
KR20070088975A (en) * 2006-02-27 2007-08-30 소양섭 A manufacturing process of prepackaged repairing materials using rapid setting agent composite by inorganic alkali and cementious)
KR101074258B1 (en) 2011-07-05 2011-10-17 주식회사 유니온 Cement mineral based accelerating agent used amorphous calcium aluminate made by water cooling method and manufacturing method thereof
KR101149343B1 (en) 2011-08-26 2012-05-29 동부엔지니어링 주식회사 Composition of slow setting cement

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