KR100549958B1 - Ground reinforcing composites in environmentally friendly inorganic system and its ground reinforcing construction method thereof - Google Patents

Ground reinforcing composites in environmentally friendly inorganic system and its ground reinforcing construction method thereof Download PDF

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KR100549958B1
KR100549958B1 KR1020050024590A KR20050024590A KR100549958B1 KR 100549958 B1 KR100549958 B1 KR 100549958B1 KR 1020050024590 A KR1020050024590 A KR 1020050024590A KR 20050024590 A KR20050024590 A KR 20050024590A KR 100549958 B1 KR100549958 B1 KR 100549958B1
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ground
ground reinforcement
component
slurry
calcium
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정시영
이주석
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정시영
이주석
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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
    • C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
    • C09K17/18—Prepolymers; Macromolecular compounds
    • C09K17/32—Prepolymers; Macromolecular compounds of natural origin, e.g. cellulosic materials
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/32—Aluminous cements
    • 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
    • C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
    • C09K17/48—Organic compounds mixed with inorganic active ingredients, e.g. polymerisation catalysts

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Abstract

본 발명은 친환경 무기계 지반보강재 조성물 및 이를 이용한 지반보강공법에 관한 것으로, 그 목적은 종래의 약액주입공법에 비해 경화체의 강도가 매우 높고, 장기 내구성이 우수하며, 영구 차수 및 지반보강을 동시에 달성할 수 있는 친환경 무기계 지반보강재 조성물 및 이를 이용한 지반보강공법을 제공하는 것이다. The present invention relates to an environment-friendly inorganic ground reinforcement composition and a ground reinforcement method using the same, the purpose of which is that the strength of the cured body is very high, long-term durability is superior, compared to the conventional chemical liquid injection method, can achieve both the permanent order and ground reinforcement It is to provide an environmentally friendly inorganic ground reinforcement composition and ground reinforcement method using the same.

본 발명은 알루미나시멘트 성분 10 ~ 35wt%, 칼슘설포알루미네이트(CSA) 성분 25 ~ 45wt%, 석고 10 ~ 30wt%, 칼슘 플루오로 알루미네이트 성분 5 ~ 20wt%, 반응성 조절제(RT) 0.3 ~ 5.0wt% 을 포함하여 이루어져 있으며, 이와 같은 지반보강재 조성물에 의해 지반을 보강하도록 되어 있다.The present invention is alumina cement component 10 ~ 35wt%, calcium sulfoaluminate (CSA) component 25 ~ 45wt%, gypsum 10 ~ 30wt%, calcium fluoroaluminate component 5 ~ 20wt%, reactive modifier (RT) 0.3 ~ 5.0wt It consists of%, and is to reinforce the ground by such ground reinforcement composition.

그라우트, 지반보강, 지반보강조성물, 연약지반, 지반보강공법 Grout, ground reinforcement, ground reinforcement composition, soft ground, ground reinforcement method

Description

친환경 무기계 지반보강재 조성물 및 이를 이용한 지반보강공법{Ground reinforcing composites in environmentally friendly inorganic system and its ground reinforcing construction method thereof}Ground reinforcing composites in environmentally friendly inorganic system and its ground reinforcing construction method

도 1 은 본 발명에 따른 시공블록도1 is a construction block diagram according to the present invention

도 2 는 본 발명에 따른 지반주입 장비의 고정예시도2 is a fixed example of the ground injection equipment according to the present invention

도 3 은 본 발명에 따른 관입완료 예시도Figure 3 is a complete view of penetration in accordance with the present invention

도 4 는 본 발명에 따른 무기계 지반보강재 1차 분사 예시도Figure 4 is an illustration of the inorganic ground reinforcement primary injection according to the present invention

도 5 는 본 발명에 따른 무기계 지반보강재 분사완료 예시도Figure 5 is an illustration of the completion of the inorganic ground reinforcement injection in accordance with the present invention

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

(1) : 무기계 지반보강재 분사 장비(1): inorganic ground reinforcement injection equipment

(2) : 2중 강관(2): double steel pipe

(10) : 무기계 지반보강재(10): inorganic ground reinforcement

본 발명은 친환경 무기계 지반보강재 조성물 및 이를 이용한 지반보강공법에 관한 것으로, 친환경적이고 내구성이 우수한 무기질계 지반보강재 조성물을 연약지반에 주입하여 연약지반을 강화 또는 안정화시킬 수 있는 친환경 무기계 지반보강재 조성물 및 이를 이용한 지반보강공법에 관한 것이다. The present invention relates to an environment-friendly inorganic ground reinforcement composition and a ground reinforcing method using the same, an environment-friendly inorganic ground reinforcement composition that can strengthen or stabilize the soft ground by injecting environmentally friendly and durable inorganic ground reinforcement composition into the soft ground and the same It relates to the ground reinforcement method used.

현재, 연약지반의 차수 및 지반 보강을 위하여 물 유리계 및 약액 주입공법 에 의한 지반 보강공법이 널리 사용되고 있다. 이들 지반 보강공법은 시공 당시 지반 속에서 물과 그라우트 재교가 반응하여 대부분 회석이 되며, 시공 후 일정 기간이 경과되면 그라우트 성분 중 물유리 성분의 용탈현상으로 인하여 차수 및 보강 효과가 감소하게 되므로, 다시 그라우트 작업을 하여 재시공해야 하는 문제점이 있었다. At present, ground reinforcement method by water glass and chemical injection method is widely used for ordering and reinforcement of soft ground. These ground reinforcement methods are mostly lime due to the reaction of water and grout in the ground at the time of construction, and after a certain period of time, the order and reinforcement effect are reduced due to the leaching of the water glass component of the grout. There was a problem to rework after work.

또한, 대부분 그라우트 재료의 성분 중에는 물유리계 성분이 첨가되어 있으며, 이러한 물유리계 성분은 강알카리성으로 토양 및 지하수의 오염을 초래하게 되고, 이로 인해 지반이 약한 수리시설물, 해안 지반 보강시 지하수 및 인근 토양을 오염되어 또다른 환경문제가 발생되었다.In addition, most of the components of the grout material are water glass-based components, and these water glass-based components are strongly alkaline, causing contamination of soil and groundwater, which causes weak ground repair facilities, groundwater and nearby soils when reinforcing the ground. The pollution caused another environmental problem.

또한, 해안 공사시 일반적인 물유리가 해수와 접촉하였을 경우 해수 중의 황산염은 수산화칼슘 및 칼슘 알루미네이트와 같은 시멘트 수화생성물과 반응하여 에트링가이트를 생성하게 되므로, 체적 팽창압에 의해 시멘트 경화제가 파괴되는 문제점이 있었다. In addition, when general water glass is in contact with seawater during coastal construction, sulfate in seawater reacts with cement hydration products such as calcium hydroxide and calcium aluminate to produce ettringite, which causes the problem that cement hardener is destroyed by volume expansion pressure. there was.

또한, 6가 크롬(Cr+6)은 국제 암 연구센터 및 미국 환경보호국에서 석면과 더불어 2대 발암물질로 지정되어 있는 중금속으로, 인체 피부암 및 인체 체내에 축 적이 되어 각종 암을 유발시키는 발알 물질로 구분되어 있으나, 시멘트의 제조 과정에서 시멘트 원료에 포함되어 있는 천연의 3가 크롬(Cr+3)의 일부는 소성 과정에서 산화되어 6가 크롬(Cr+6)으로 변화되므로 인체에 좋지 않은 영향을 주는 등 많은 문제점이 있었다. Hexavalent chromium (Cr +6 ) is a heavy metal that has been designated as the second carcinogen in addition to asbestos by the International Cancer Research Center and the US Environmental Protection Agency. However, some of the natural trivalent chromium (Cr +3 ) contained in the cement raw material in the manufacturing process of the cement is oxidized during the calcination process and converted into hexavalent chromium (Cr +6 ), which is not good for the human body. There were many problems such as giving.

본 발명은 상기와 같은 문제점을 해소하기 위한 것으로 그 목적은 종래의 약액주입공법에 비해 경화체의 강도가 매우 높고, 장기 내구성이 우수하며, 영구 차수 및 지반보강을 동시에 달성할 수 있는 친환경 무기계 지반보강재 조성물 및 이를 이용한 지반보강공법을 제공하는 것이다. The present invention is to solve the above problems, the purpose is that the strength of the cured body is very high compared to the conventional chemical liquid injection method, excellent long-term durability, environmentally friendly inorganic ground reinforcement that can achieve both the permanent order and ground reinforcement at the same time It is to provide a composition and ground reinforcing method using the same.

본 발명은 알루미나시멘트 성분 10 ~ 35wt%, 칼슘설포알루미네이트(CSA) 성분 25 ~ 45wt%, 석고 10 ~ 30wt%, 칼슘 플루오로 알루미네이트 성분 5 ~ 20wt%, 반응성 조절제(RT) 0.3 ~ 5.0wt%로 이루어져 있다.  The present invention is alumina cement component 10 ~ 35wt%, calcium sulfoaluminate (CSA) component 25 ~ 45wt%, gypsum 10 ~ 30wt%, calcium fluoroaluminate component 5 ~ 20wt%, reactive modifier (RT) 0.3 ~ 5.0wt It consists of%.

상기 알루미나시멘트는 CA, CA2 , C12A7이 주요 화합물로 구성되어 있으며, 지반 주입재 슬러리의 강도를 조기에 확보하기 위한 것으로, 보통포틀랜드시멘트보다 반응성이 매우 빠르며, 알루미나시멘트의 함량이 10wt% 이하인 경우에는 겔화시간 직후의 초기 강도가 낮아서 연속적인 지반내의 주입작업에 곤란하며, 35wt% 이상인 경우에는 슬러리의 유동성을 저해하기 때문에 믹서내의 교반작업에 지장을 초래할 수 있다. The alumina cement is composed of CA, CA 2 , C 12 A 7 as the main compound, to secure the strength of the ground filler slurry early, very responsive than ordinary portland cement, alumina cement content of 10wt% In the following case, the initial strength immediately after the gelling time is low, which makes it difficult to continuously inject the ground. In the case of 35 wt% or more, the fluidity of the slurry is impaired, which may cause agitation in the mixer.

상기 칼슘설포알루미네이트(CSA)는 경화체의 용적변화를 최소화하기 위한 것으로, C4A3S가 주요 화합물로 있으며, 초기의 반응성을 높이기 위해서 비표면적이 5,000 ~ 10,000㎠/g인 분말을 사용하였다. 칼슘설포알루미네이트는 석고와 반응하여 에트링자이트 수화물(C6AS3H32)을 형성함으로서 보다 많은 물분자를 결합수로 고정시키며, 사용량이 25wt% 이하인 경우에는 슬러리의 겔 강도가 낮아지고, 45wt% 이상인 경우에는 작업성의 유지시간이 짧아지게 된다. The calcium sulfoaluminate (CSA) is for minimizing the volume change of the cured product. C 4 A 3 S is the main compound, and a powder having a specific surface area of 5,000 to 10,000 cm 2 / g was used to increase initial reactivity. . Calcium sulfoaluminate reacts with gypsum to form ettringite hydrate (C 6 AS 3 H 32 ) to fix more water molecules with bound water, and when the amount is less than 25wt%, the gel strength of the slurry is lowered. In the case of more than 45wt%, the maintenance time of workability is shortened.

상기 석고는 전술한 것처럼 칼슘설포알루미네이트와 반응하여 에트링자이트 수화물을 형성시키기 위한 것으로, 본 발명에서는 무수석고가 가장 바람직하며, 사용량이 15wt% 이하인 경우에는 칼슘설포알루미네이트와 반응하기 위한 양으로 부족하며, 35wt% 이상인 경우에는 슬러리의 강도발현이 늦어지게 된다.As described above, the gypsum reacts with calcium sulfoaluminate to form ettringite hydrate, and in the present invention, anhydrous gypsum is most preferred, and when the amount is 15 wt% or less, the amount for reacting with calcium sulfoaluminate Insufficient as, when the strength is more than 35wt%, the strength of the slurry is delayed.

상기 칼슘 플루오로 알루미네이트 성분은 지반 주입재의 겔타임을 확보에 가장 큰 역할을 하는 성분으로, C11A7CaF2가 주요 구성 화합물이며, 사용량이 5wt% 이하인 경우에는 주입재의 겔화 시간이 길어지기 때문에 소기의 성과를 얻을 수 없으며, 30wt% 이상인 경우에는 교반 작업 시 슬러리의 겔화를 촉진시켜 작업성에 문제를 초래한다.The calcium fluoro aluminate component is the most important component to secure the gel time of the ground injection material, C 11 A 7 CaF 2 is the main constituent compound, the gelation time of the injection material becomes longer when the amount used is 5wt% or less Therefore, the desired performance cannot be obtained, and in the case of 30 wt% or more, it promotes gelation of the slurry during the stirring operation, causing problems in workability.

상기 반응성 조절재는 슬러리의 겔화 시간을 조절하기 위한 것으로, 자당(sucrose), 구연산 칼슘(calcium citrate), 글루코오스(Glucose), 맥토오스 (Maltose), celobiose, lignosulphate, hydrosy carboxylic acid, 탄산나트륨(sodium carbonate), sodium sulphate, 리튬염, 규불화염 중에서 2 ~ 3 가지를 함께 사용한다. 사용량이 0.5wt% 이하일 경우에는 작업성 확보에 어려움(겔화시간이 짧아지게 되므로)이 있으며, 5wt% 이상일 경우에는 겔화 시간의 확보(교반 및 시공작업을 용이하게 하기 위한 시간의 확보)가 어렵게 된다. The reactive modulator is to control the gelation time of the slurry, sucrose, calcium citrate, glucose (glucose), maltose, celobiose, lignosulphate, hydrosy carboxylic acid, sodium carbonate Use two or three of them together, among sodium sulphate, lithium salts, and silicate salts. If the amount is less than 0.5wt%, it is difficult to secure the workability (because the gelation time is shortened), and if it is more than 5wt%, it is difficult to secure the gelation time (to secure the time to facilitate the stirring and construction work). .

이하 본 발명을 실시예에 의해 상세히 설명하면 다음과 같다. Hereinafter, the present invention will be described in detail by way of examples.

실시예 1Example 1

알루미나시멘트 20wt%, CSA 분말 35wt%, 석고 27wt%, 칼슘 플루오로 알루미네이트 15.5wt%, 반응성 조절제 2.5wt%를 첨가하여 지반보강재 조성물을 제조하고, 상기 지반 보강재 조성물과 슬래그시멘트 미분말과의 반응에 대한 겔타임, 가사시간, 압축강도 시험을 하였으며, 그 결과는 [표1]과 같다.
이때, 상기 지반보강재 조성물과 슬래그 시멘트 미분말은 각각 물을 혼합하여 슬러리를 형성한 후, 이를 혼합하였으며, 상기 지반 보강재 조성물과 물은 100 : 450 의 비율로 혼합하여 슬러리를 형성하고, 슬래그 시멘트 미분말과 물은 100 : 170의 비율로 혼합하여 슬러리를 형성하였다.20 wt% of alumina cement, 35 wt% of CSA powder, 27wt% of gypsum, 15.5wt% of calcium fluoroaluminate, and 2.5wt% of reactive modifier were added to prepare a ground reinforcement composition, and reacted with the ground reinforcement composition and the slag cement fine powder. Gel time, pot life, and compressive strength tests were carried out, and the results are shown in [Table 1].
At this time, the ground reinforcement composition and the slag cement fine powder were mixed with water to form a slurry, and then mixed with each other, and the ground reinforcement composition and water were mixed at a ratio of 100: 450 to form a slurry, and the slag cement fine powder was Water was mixed at a ratio of 100: 170 to form a slurry.

[표1]Table 1

Figure 112005015574179-pat00001
Figure 112005015574179-pat00001

실시예 2Example 2

알루미나시멘트 9wt%, CSA 분말 35wt%, 석고 27wt%, 칼슘 플루오로 알루미네이트 26.5wt%, 반응성 조절제 2.5wt%를 첨가하여 지반 보강재 조성물을 형성하고, 상기 지반보강재 조성물과 슬래그시멘트 미분말과의 반응에 대한 겔타임, 가사시간, 압축강도 시험을 하였으며, 이를 실시예 1 의 조성비와 비교하였다. 그 결과는 [표2]와 같다.
이때, 상기 지반보강재 조성물과 슬래그 시멘트 미분말은 각각 물을 혼합하여 슬러리를 형성한 후, 이를 혼합하였으며, 상기 지반 보강재 조성물과 물은 100 : 450 의 비율로 혼합하여 슬러리를 형성하고, 슬래그 시멘트 미분말과 물은 100 : 170의 비율로 혼합하여 슬러리를 형성하였다.9 wt% of alumina cement, 35 wt% of CSA powder, 27 wt% of gypsum, 26.5 wt% of calcium fluoroaluminate, and 2.5 wt% of reactive modifier were added to form a ground reinforcement composition, and the reaction between the ground reinforcement composition and the slag cement fine powder Gel time, pot life, and compressive strength tests were performed, and this was compared with the composition ratio of Example 1. The results are shown in [Table 2].
At this time, the ground reinforcement composition and the slag cement fine powder were mixed with water to form a slurry, and then mixed with each other, and the ground reinforcement composition and water were mixed at a ratio of 100: 450 to form a slurry, and the slag cement fine powder was Water was mixed at a ratio of 100: 170 to form a slurry.

[표2][Table 2]

Figure 112005015574179-pat00002
Figure 112005015574179-pat00002

상기 [표2]에서 알 수 있듯이 실시예 1,2 는 모두 10 초이내의 겔타임을 구비하나, 실시예 2 의 경우, 겔타임이 5초 정도로 지나치게 빨라 이후의 안정적인 수화반응에 지자을 초래하게 되며, 이로 인해 장기적인 압축강도에 현저한 차이기 있음을 알 수 있다. 특히 실시예 2 의 경우, 재령 28일 기준으로 25㎏f/㎠ 에 근접되게 떨어짐을 알 수 있다. As can be seen in Table 2, Examples 1 and 2 all have gel times within 10 seconds, but in Example 2, the gel time is too fast, about 5 seconds, resulting in a stable hydration reaction thereafter. As a result, it can be seen that there is a significant difference in long-term compressive strength. In particular, in the case of Example 2, it can be seen that the drop close to 25kgf / ㎠ based on the age of 28 days.

실시예 3Example 3

알루미나시멘트 31.5wt%, CSA 분말 35wt%, 석고 27wt%, 칼슘 플루오로 알루미네이트 4wt%, 반응성 조절제 2.5wt%를 첨가하여 지반보강재 조성물을 형성하고, 상기 지반보강재 조성물과 슬래그시멘트 미분말과의 반응에 대한 겔타임, 가사시간, 압축강도 시험을 하였으며,이를 실시예 1 의 조성비와 비교하였다. 그 결과는 [표3]과 같다.
이때, 상기 지반보강재 조성물과 슬래그 시멘트 미분말은 각각 물을 혼합하여 슬러리를 형성한 후, 이를 혼합하였으며, 상기 지반 보강재 조성물과 물은 100 : 450 의 비율로 혼합하여 슬러리를 형성하고, 슬래그 시멘트 미분말과 물은 100 : 170의 비율로 혼합하여 슬러리를 형성하였다.31.5wt% of alumina cement, 35wt% of CSA powder, 27wt% of gypsum, 4wt% of calcium fluoroaluminate, and 2.5wt% of reactive modifier were added to form a ground reinforcement composition, and reacted with the ground reinforcement composition and slag cement fine powder. Gel time, pot life, and compressive strength tests were performed, which were compared with the composition ratio of Example 1. The results are shown in [Table 3].
At this time, the ground reinforcement composition and the slag cement fine powder were mixed with water to form a slurry, and then mixed with each other, and the ground reinforcement composition and water were mixed at a ratio of 100: 450 to form a slurry, and the slag cement fine powder was Water was mixed at a ratio of 100: 170 to form a slurry.

[표3]Table 3

Figure 112005015574179-pat00003
Figure 112005015574179-pat00003

비교예Comparative example

알루미나시멘트 20wt%, CSA 분말 35wt%, 석고 27wt%, 칼슘 플루오로 알루미네이트 15.5wt%, 반응성 조절제 2.5wt%로 이루어진 지반보강재 조성물을 형성하고, 상기 지반보강재 조성물과 슬래그시멘트 미분말과의 반응에 대한 겔타임, 가사시간, 압축강도 시험을 측정하였으며, 이를 국내에서 시판되고 있는 A사의 무기질계 지반주입재 제품(A제품)과 비교 실험하였다. 그 결과는 [표4]와 같다.
이때, 상기 지반보강재 조성물과 슬래그 시멘트 미분말은 실시예 1 과 동일하게 물을 혼합하여 각각 슬러리를 형성한 후 혼합하였다.Formed ground reinforcement composition consisting of alumina cement 20wt%, CSA powder 35wt%, gypsum 27wt%, calcium fluoro aluminate 15.5wt%, reactive modifier 2.5wt%, and the reaction between the ground reinforcement composition and the slag cement fine powder Gel time, pot life, and compressive strength tests were measured and compared with the inorganic ground injection products (A products) that are commercially available in Korea. The results are shown in [Table 4].
At this time, the ground reinforcing material composition and the slag cement fine powder was mixed with water in the same manner as in Example 1 to form a slurry, respectively.

[표4]Table 4

Figure 112005068766967-pat00009
Figure 112005068766967-pat00009

상기에서와 같이, 본 발명의 지반 주입재 조성물은 겔타임이 10 초이내이고, 가사시간이 30 분 이상이며, 압축강도가 재령 7일 기준으로 300 kgf/㎠ 이상을 구비하고 있으며, 이를 종래의 제품과 대비할 경우, 겔타임이 매우 빠르고, 장기적인 압축강도가 안정적으로 발현이 되는 등 매우 우수한 효과가 있음을 알 수 있다.  As described above, the ground injection material composition of the present invention has a gel time of less than 10 seconds, pot life of 30 minutes or more, and has a compressive strength of 300 kgf / ㎠ or more on the basis of 7 days of age, which is a conventional product In contrast, the gel time is very fast, and the long-term compressive strength is stably expressed.

상기 실시예 1 내지 3 및 비교예의 압축강도 시험은 KS L 5105에 규정된 시멘트 압축강도 시험 몰드 및 양생조건에 준하여 실험을 하였다.
또한, 실시예 1 내지 3 및 비교예의 슬러리 형성 즉, 지반 보강재 조성물과 물, 슬래그 시멘트 미분말과 물의 혼합비율은 두 슬러리가 서로 혼합될 수 있을 정도의 양호한 유동성을 구비하면 되므로, 반드시 상기 기재의 혼합비율로 한정되는 것은 아니다. The compressive strength test of Examples 1 to 3 and Comparative Examples was conducted in accordance with the cement compressive strength test mold and curing conditions specified in KS L 5105.
In addition, the slurry formation of Examples 1 to 3 and Comparative Examples, that is, the mixing ratio of the ground reinforcement composition and water, the slag cement fine powder and the water, should have good fluidity such that the two slurries can be mixed with each other. It is not limited to the ratio.

상기와 같이 조성되는 본 발명의 지반보강 조성물을 이용하여 연약지반을 보강하고자 할 경우, 먼저 천공기 등에 의해 연약지반에 수직으로 구멍을 형성하고, 상기 구멍내에 이중관을 설치하며, 알루미나시멘트 성분 10 ~ 35wt%, 칼슘설포알루미네이트(CSA) 성분 25 ~ 45wt%, 석고 10 ~ 30wt%, 칼슘 플루오로 알루미네이트 성분 5 ~ 20wt%, 반응성 조절제(RT) 0.3 ~ 5.0wt% 를 믹서내로 물과 함께 교반하여 제 1 슬러리를 생성하고, 급결제(슬래그 시멘트 미분말)와 물을 믹서내에서 섞어 제 2 슬러리를 생성한 후, 상기 제 1,2 슬러리를 펌프에 의해 호스를 따라 이중관으로 이송시킨다. When reinforcing the soft ground using the ground reinforcing composition of the present invention as described above, first to form a hole perpendicular to the soft ground by a perforator, and install a double tube in the hole, alumina cement component 10 ~ 35wt %, Calcium sulfoaluminate (CSA) component 25 ~ 45wt%, gypsum 10 ~ 30wt%, calcium fluoroaluminate component 5 ~ 20wt%, reactive modifier (RT) 0.3 ~ 5.0wt% by stirring with water into the mixer After the first slurry is produced, the fastener (slag cement fine powder) and water are mixed in a mixer to produce a second slurry, and the first and second slurries are transferred to a double tube along a hose by a pump.

이와 같이 이송된 제 1,2 슬러리는 이중관을 통해 각각 하부로 즉, 서로 혼합되지 않은 상태에서 하부로 이송되고, 이중관 끝단 약 30∼40㎝ 에서 제 1,2 슬러리가 혼합됨으로써, 천공된 구멍으로 주입되어 지반을 보강하도록 되어 있다. 즉, 상기 이중관은 끝단 약 30∼40㎝ 에서 각각 이송된 제 1,2 슬러리가 혼합되도록 구성되어 있으며, 이와 같은 이중관의 구성은 공지된 기술이므로 상세한 설명은 생략한다. 또한, 상기 제 1,2 슬러리의 유동성은 펌프에 의해 이송되고 서로 균일하게 혼합될 수 있을 정도의 양호한 유동성을 구비하면 되고, 이러한 유동성은 당업자에게 자명하고 현장에서 적절하게 혼합할 수 있는 공지된 기술이므로, 이에 대한 상세한 설명은 생략한다. The first and second slurries thus conveyed are respectively conveyed downwardly through the double pipe, that is, downwardly, without being mixed with each other, and the first and second slurries are mixed at about 30 to 40 cm at the end of the double pipe to the perforated holes. It is injected to reinforce the ground. That is, the double pipe is configured to mix the first and second slurries, respectively, conveyed at about 30 to 40 cm at the end, and the detailed description of the double pipe is omitted because it is a known technology. In addition, the flowability of the first and second slurries may be provided with a good fluidity enough to be transported by a pump and to be uniformly mixed with each other, and such fluidity is well known to those skilled in the art and can be properly mixed in the field. Therefore, detailed description thereof will be omitted.

본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

이와 같이 본 발명은 알루미나시멘트 성분 10 ~ 35wt%, 칼슘설포알루미네이트(CSA) 성분 25 ~ 45wt%, 석고 10 ~ 30wt%, 칼슘 플루오로 알루미네이트 성분 5 ~ 20wt%, 반응성 조절제(RT) 0.3 ~ 5.0wt%로 이루어진 무기계 지반보강재 조성물을 주입하도록 되어 있어, 지하수 및 인근 토양의 오염을 방지할 수 있으며, 연약지반 및 차수가 필요한 지반을 동시에 보강할 수 있다. As described above, the present invention is alumina cement component 10 ~ 35wt%, calcium sulfoaluminate (CSA) component 25 ~ 45wt%, gypsum 10 ~ 30wt%, calcium fluoroaluminate component 5 ~ 20wt%, reactive modifier (RT) 0.3 ~ Since the inorganic ground reinforcement composition made of 5.0wt% is injected, it is possible to prevent contamination of the groundwater and the surrounding soil, and to reinforce the ground at the same time the soft ground and the order required.

또한, 본 발명은 칼슘설포알루미네이트 성분과 석고의 초기반응을 촉진하여 애트링자이트를 반응초기에 생성 및 안정화시킴으로써, 팽창압에 의한 경화체의 파괴를 방지할 수 있다. In addition, the present invention can accelerate the initial reaction of the calcium sulfoaluminate component and gypsum to form and stabilize the atlingite early in the reaction, thereby preventing the destruction of the cured body due to the expansion pressure.

또한 본 발명은 기존 지반보강 그라우트 조성물에 사용되는 물유리 성분으로 인한 용탈현상이 없으며, 이로 인해 다시 그라우트 작업을 하여 재시공하는 불편함 및 경제적 손실을 방지할 수 있다.In addition, the present invention does not have a dissolution phenomenon due to the water glass component used in the existing ground reinforcement grout composition, thereby preventing the inconvenience and economic loss of reconstruction by grouting work again.

또한 본 발명의 무기계 지반보강재 조성물은 시멘트 성분의 수화과정에서 중금속 성분들이 고용체로 시멘트 수화물에 결합되므로, 인체 발암 물질인 6가 크롬의 용출을 방지하는 등 많은 효과가 있다. In addition, the inorganic ground reinforcing material composition of the present invention has a number of effects, such as preventing the dissolution of hexavalent chromium, which is a human carcinogen, since heavy metal components are bonded to cement hydrate in solid solution during the hydration of the cement component.

Claims (4)

알루미나시멘트 성분 10 ~ 35wt%, Alumina cement components 10-35wt%, 칼슘설포알루미네이트(CSA) 성분 25 ~ 45wt%,Calcium sulfoaluminate (CSA) component 25 ~ 45wt%, 석고 10 ~ 30wt%,Gypsum 10-30 wt%, 칼슘 플루오로 알루미네이트 성분 5 ~ 20wt%,Calcium fluoro aluminate component 5-20wt%, 반응성 조절제(RT) 0.3 ~ 5.0wt% 을 포함하는 것을 특징으로 하는 친환경 무기계 지반보강재 조성물.Environment-friendly inorganic ground reinforcement composition, characterized in that it comprises a reactivity regulator (RT) 0.3 ~ 5.0wt%. 제 1 항에 있어서; The method of claim 1; 상기 칼슘설포알루미네이트(CSA)는 비표면적이 5,000 ~ 10,000㎠/g의 분말인 것을 특징으로 하는 친환경 무기계 지반보강재 조성물.The calcium sulfoaluminate (CSA) is an environmentally friendly inorganic ground reinforcement composition, characterized in that the specific surface area of 5,000 ~ 10,000 ㎠ / g powder. 제 1 항에 있어서;The method of claim 1; 상기 반응성 조절재는 자당(sucrose), 구연산 칼슘(calcium citrate), 글루코오스(Glucose), 맥토오스(Maltose), celobiose, lignosulphate, hydroxy carboxylic acid, 탄산나트륨(sodium carbonate), sodium sulphate, 리튬염, 규불화염으로 이루어진 군에서 선택된 2 ~ 3 개를 혼용하는 것을 특징으로 하는 친환경 무기계 지반보강재 조성물.The reactive regulators are sucrose, calcium citrate, glucose, glucose, maltose, celobiose, lignosulphate, hydroxy carboxylic acid, sodium carbonate, sodium sulphate, lithium salts, and silofluoride salts. Eco-friendly inorganic ground reinforcement composition, characterized in that used in combination of two to three selected from the group consisting of. 천공기 등에 의해 연약지반에 수직으로 구멍을 형성하고, 상기 구멍내에 이중관을 설치하는 단계;Forming a hole perpendicular to the soft ground by a perforator, and installing a double pipe in the hole; 알루미나시멘트 성분 10 ~ 35wt%, 칼슘설포알루미네이트(CSA) 성분 25 ~ 45wt%, 석고 10 ~ 30wt%, 칼슘 플루오로 알루미네이트 성분 5 ~ 20wt%, 반응성 조절제(RT) 0.3 ~ 5.0wt% 를 믹서내로 물과 함께 교반하여 유동성을 구비하는 제 1 슬러리를 생성하는 단계;10 to 35wt% of alumina cement component, 25 to 45wt% of calcium sulfoaluminate (CSA) component, 10 to 30wt% of gypsum, 5 to 20wt% of calcium fluoroaluminate component, 0.3 to 5.0wt% of reactive modifier (RT) Stirring with water into to produce a first slurry having flowability; 슬래그 시멘트 미분말과 물을 믹서내에서 섞어 유동성을 구비하는 제 2 슬러리를 생성하는 단계;Mixing the slag cement powder and water in a mixer to produce a second slurry having fluidity; 상기 제 1,2 슬러리를 펌프에 의해 호스를 따라 이중관으로 이송시키는 단계;Transferring the first and second slurries to a double pipe along a hose by a pump; 상기 제 1 슬러리와 제 2 슬러리를 이중관으로 각각 주입하여 하부로 이송시키는 단계;Injecting the first slurry and the second slurry into a double tube and transporting them downward; 상기 이중관을 통해 이송된 각각의 제 1,2 슬러리를 이중관 끝단에서 혼합하여 지반을 보강하는 단계로 이루어진 것을 특징으로 하는 친환경 무기계 지반보강재 조성물을 이용한 지반보강공법.Ground reinforcing method using an environmentally friendly inorganic soil reinforcing material composition, characterized in that the step of reinforcing the ground by mixing each of the first and second slurry transferred through the double pipe at the end of the double pipe.
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