KR102134887B1 - Ultra-Rapid Composition for grouting - Google Patents
Ultra-Rapid Composition for grouting Download PDFInfo
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Abstract
Description
본 발명은 친환경 속경성 그라우팅용 조성물에 관한 것으로, 더욱 상세히는 주입재의 양생시간을 단축시키고 초기 강도 발현이 빠르며 친환경성을 갖는 강관다단 친환경 속경성 그라우팅용 조성물에 관한 것이다.The present invention relates to a composition for an eco-friendly fast-hardening grouting, and more particularly, to a composition for a steel pipe multi-stage eco-friendly fast-hardening grouting, which shortens the curing time of an injection material and has an early initial strength expression and has eco-friendliness.
강도와 자립도가 낮은 연약 지반에서 터널을 굴착할 때에는 굴착 공정에 앞서 지반을 보강해야 한다. 이러한 보강방법으로 가장 널리 사용되는 것이 그라우팅 공법이다. 터널 보강을 위한 그라우팅 공법은 터널 굴착 전에 굴착면 전방에 강관 설치 및 그라우트재를 주입하여 원지반의 강도를 증대시킴으로써 터널 굴착면을 안정화시키고 붕괴를 방지한다.When excavating tunnels on soft grounds with low strength and independence, the ground must be reinforced prior to the excavation process. The most widely used method of reinforcing is the grouting method. The grouting method for tunnel reinforcement stabilizes the tunnel excavation surface and prevents collapse by increasing the strength of the ground by installing a steel pipe and grouting material in front of the excavation surface before tunnel excavation.
강관다단 그라우팅 공법은 굴착 예정인 터널 막장면에서 천공을 수행한다. 예컨대, 아치형 터널의 경우 아치(크라운부)를 따라 연속적으로 천공을 수행한다. 천공이 수행된 지반은 터널 형성 후 터널의 전방 영역이 된다. 천공 각도는 대략 5~10도 정도로 형성한다. 천공 후에는 다수의 분사공이 형성되어 있는 강관을 천공홀에 삽입하고 씰재(seal material) 주입관을 설치한 후, 천공홀 전단을 밀폐하는 코킹 작업을 수행한다. 천공홀이 밀폐되면 천공홀 내벽과 강관 사이의 공간에 씰재를 주입하여 겔 상태로 경화시킨다. 이후 강관을 통해 그라우트재(본주입재)를 가압하여 공급하면, 본주입재는 실재를 통과한 후 지반으로 주입되어 지반 내 균열을 메우고 지반을 일체화시켜 강도를 강화시킨다. 그라우트재가 경화되면 막장면을 기계굴착 또는 발파굴착을 수행한다. 지반 보강을 수행하였는 바, 굴착 과정에서 천정이 붕괴되는 등의 원치 않는 사고를 방지할 수 있고, 굴착설계에 따른 안정적 굴착작업이 가능하다.The steel pipe multi-stage grouting method performs drilling on the tunnel face that is to be excavated. For example, in the case of an arched tunnel, drilling is continuously performed along an arch (crown). The ground where the perforation has been performed becomes the front region of the tunnel after the tunnel is formed. The perforation angle is approximately 5 to 10 degrees. After drilling, a steel pipe in which a plurality of injection holes are formed is inserted into a drilling hole, and after a seal material injection pipe is installed, a caulking operation is performed to close the front end of the drilling hole. When the perforated hole is closed, a sealant is injected into the space between the inner wall of the perforated hole and the steel pipe to cure the gel. Subsequently, when the grout material (main injection material) is pressed and supplied through the steel pipe, the main injection material is injected into the ground after passing through the actual material, filling the cracks in the ground, and integrating the ground to enhance strength. When the grout material is cured, mechanical excavation or blasting excavation is performed on the film surface. Since the ground reinforcement was performed, unwanted accidents such as the collapse of the ceiling in the excavation process can be prevented, and stable excavation according to the excavation design is possible.
상기한 강관다단 그라우팅 공법을 적용하는데 있어서 가장 큰 난제 중 하나는 공기의 단축에 관한 것이다. 위에서 설명하였듯이 강관다단 그라우팅 공법에서는 지반에 주입된 그라우트재가 경화된 후에 터널 굴착이 가능하기 때문에 경화 속도가 느리면 공기가 지연될 수밖에 없다. 일반적인 양생기준으로 그라우트재를 주입한 후 약 24시간 내외의 양생을 하도록 되어 있다. 그 밖에 실내시험 등을 통해 적정 경화시간이 확인된 경우 배합비를 변경할 수 있으며, 압축강도가 2MPa 이상의 강도확보 후 후속공정(발파)을 진행토록 하는 기준이 적용되고 있다.One of the biggest challenges in applying the above-mentioned steel pipe multi-stage grouting method is the shortening of air. As described above, in the steel pipe multi-stage grouting method, the tunnel can be excavated after the grout material injected into the ground is cured, so the air is delayed if the curing speed is slow. According to the general curing standards, curing is performed for about 24 hours after injection of grout material. In addition, when the proper curing time is confirmed through an indoor test, the mixing ratio can be changed, and a criterion is applied to ensure that the compressive strength is 2MPa or more and then proceed to the subsequent process (blasting).
그러나, 실제 현장에서는 공기를 맞추기 위하여 충분한 양생 시간을 확보하지 못하여, 그라우트재 주입 후 24시간 양생시간을 만족하지 못한 상태에서 터널 굴착을 하는 사례도 있는 실정이다. 그라우트재가 충분히 경화하여 지반과 강관이 서로 일체화되지 못한 항태에서 발파 및 굴착이 수행되면, 시공 안전성이 문제될 수 있다.However, in practice, sufficient curing time is not secured in order to meet the air, and there are cases in which tunnel excavation is performed in a state where the curing time is not satisfied after the injection of grout material. When blasting and excavation is performed in a condition where the grout material is sufficiently hardened so that the ground and the steel pipe are not integrated with each other, construction safety may be a problem.
종래 강관다단 그라우팅 공법에 관한 기술의 예로 대한민국 특허등록 제 10-1530172호에서는 시멘트 100중량부를 기준으로, 물 20 내지 60중량부; 수축저감제 0.01 내지 5중량부; 칼슘설포알루미네이트 10 내지 30중량부; 플라이 애시 10 내지 50중량부; 증점제 0.1 내지 10중량부; 및 고성능 감수제 1 내지 5중량부를 포함하는 그라우트재 조성물을 제시하고 있으며, 이러한 그라우트 조성물에 의해 재료분리를 억제하여 블리딩수의 발생을 방지하며, 고유동성을 유지하여 작업성을 높이고, 그라우팅 시공시 충진성능을 확보하여 전체구조물의 내구수명을 확보할 수 있도록 하는 기술이 제시되고 있다.As an example of a technique for a conventional steel pipe multi-stage grouting method, in Korean Patent Registration No. 10-1530172, 20 to 60 parts by weight of water based on 100 parts by weight of cement; Shrinkage reducing agent 0.01 to 5 parts by weight; 10 to 30 parts by weight of calcium sulfoaluminate; 10 to 50 parts by weight of fly ash; 0.1 to 10 parts by weight of a thickener; And a grout material composition comprising 1 to 5 parts by weight of a high performance water reducing agent, and suppressing material separation by such a grout composition to prevent generation of bleeding water, maintaining high fluidity to increase workability, and filling during grouting construction Techniques have been proposed to ensure performance and ensure the durability of the entire structure.
그런데 상기 특허에서는 그라우트재(본주입재)에 대한 기술만 있을 뿐이고 선주입되는 씰재에 대한 기술이 없는바, 씰재는 주입 후 겔화시간이 너무 짧으면 과도하게 경화되어 후주입되는 그라우트재가 씰재를 관통하지 못하여 지반으로 침투되지 못하는 문제와 겔화시간이 너무 길면 역류의 문제가 있어 적정 겔화시간을 발현하기 위해서는 23±1 시간의 오랜 양생시간이 필요하다.
그리고 강관다단 그라우팅 공법에서 중요한 것은 그라우트재(본주입재) 양생 시간의 단축으로 현재 적용되고 있는 약 18±1 시간보다 훨씬 빨리 속결되면서도 적어도 2MPa 이상의 조기 압축강도 발현이 가능한 그라우트재의 개발이 절실히 요구된다.However, in the above patent, there is only a technique for the grout material (the main injection material), and there is no technology for the pre-injected seal material. If the gelation time after injection is too short, the curing material is excessively hardened and the grout material after injection cannot penetrate the seal material. If the gelation time is too long and the gelation time is too long, there is a problem of reflux, and a long curing time of 23±1 hours is required to express the proper gelation time.
And the important thing in the steel pipe multi-stage grouting method is the development of a grout material capable of expressing an early compressive strength of at least 2 MPa or more, while rapidly accelerating than the currently applied about 18±1 hour due to the shortening of the curing time of the grout material (main injection material).
삭제delete
본 발명의 목적은 단시간내에 10mm이내의 비카트침 침임량에 도달하면서 동시에 본주입재가 원활히 통과되어 본주입재가 지반내로 밀실하게 주입되고 본주입재의 역류를 방지할 수 있게 하는 씰재를 포함하는 강관다단 친환경 속경성 그라우팅용 조성물을 제공하는데 목적이 있다.The object of the present invention is to reach the non-cart needle intrusion amount within 10 mm in a short time, and at the same time, the main injection material is smoothly passed, and the main injection material is tightly injected into the ground, and a steel pipe comprising a seal material that can prevent the back flow of the main injection material. It is an object to provide an environment-friendly composition for fast-curing grouting.
또한 고분말도에 의해 씰재를 용이하게 통과하고 지반내 침투성과 내구성이 우수하며, 고강도의 압축강도 발현이 가능하게 하는 본주입재를 포함하는 강관다단 친환경 속경성 그라우팅용 조성물을 제공하는데 목적이 있다.In addition, it is an object of the present invention to provide a composition for a steel pipe multi-stage eco-friendly fast-hardening grouting including a main injection material that easily passes through a seal material by high powder, has excellent permeability and durability in the ground, and is capable of expressing high strength compressive strength.
또한 무기질 친환경 재료의 사용으로 친환경성을 갖추며 체적변동이 없음에 따른 내구성 우수와 규산소다(물유리) 대비 강도 증진률이 우수하고 무기질 재료 사용에 따른 초기 및 후기 강도의 지속적 발현이 우수하며 본주입재와 혼합시 빠른 겔반응으로 본주입재의 양생을 촉진시킬 수 있는 급결재를 포함하는 강관다단 친환경 속경성 그라우팅용 조성물을 제공하는데 목적이 있다.In addition, it is environmentally friendly with the use of inorganic eco-friendly materials, has excellent durability due to no volume fluctuation, has an excellent strength enhancement rate compared to soda silicate (water glass), has excellent initial and late strength manifestations due to the use of inorganic materials, and has An object of the present invention is to provide a steel pipe multi-stage eco-friendly fast-hardening grouting composition containing a quick-setting material capable of promoting curing of the main injection material by rapid gel reaction upon mixing.
본 발명의 친환경 속경성 그라우팅용 조성물은 강관다단 그라우팅을 위한 씰재 조성물에 있어서,The composition for eco-friendly fast-hardening grouting of the present invention is in a sealant composition for multi-stage grouting of a steel pipe,
씰재는 칼슘설포 알루미네이트 5~18중량부, 석고 8~20중량부, 소석회 5~12중량부, 플라이애시 10~20중량부, 카올리나이트 32~48중량부, 고유동화제 0.1~2중량부, 경화촉진제 0.1~1중량부를 포함하는 것을 특징으로 한다.Seal material is 5-18 parts by weight of calcium sulfo aluminate, 8-20 parts by weight of gypsum, 5-12 parts by weight of slaked lime, 10-20 parts by weight of fly ash, 32-48 parts by weight of kaolinite, 0.1-2 parts by weight of high-activating agent, Characterized in that it contains 0.1 to 1 part by weight of the curing accelerator.
또한 본 발명의 친환경 속경성 그라우팅용 조성물은 강관다단 그라우팅을 위한 본주입재 조성물에 있어서,In addition, the composition for eco-friendly fast-harding grouting of the present invention is in the main injection material composition for multi-stage grouting of steel pipes,
상기 본주입재는 칼슘설포 알루미네이트 35~48중량부, 포틀랜드 시멘트 10~20중량부, 슬래그 시멘트 10~20중량부, 슬래그 5~15중량부, 알루미늄 실리케이트 15~25중량부, 고유동화제 0.1~2중량부, 지연제 0.1~1중량부를 포함하는 것을 특징으로 한다.The main injection material is 35 to 48 parts by weight of calcium sulfo aluminate, 10 to 20 parts by weight of Portland cement, 10 to 20 parts by weight of slag cement, 5 to 15 parts by weight of slag, 15 to 25 parts by weight of aluminum silicate, 0.1 to 15 parts by weight Characterized in that it comprises 2 parts by weight, 0.1 to 1 part by weight of retarder.
본 발명의 친환경 속경성 그라우팅용 조성물은 강관다단 그라우팅을 위한 급결재 조성물에 있어서,The environment-friendly fast-hardening grouting composition of the present invention is in a rapid setting material composition for steel pipe multi-stage grouting,
상기 급결재는 무수석고 37~52중량부, 칼슘알루미네이트 10~28중량부, C12A7 10~23중량부, CaO 5~25중량부, 플라이애시 10~20중량부, 수산화알루미늄 5~25중량부, 비정질 실리카 5~12중량부, 경화촉진제 0.3~12중량부, 고유동화제 0.1~1중량부를 포함하는 것을 특징으로 포함하는 것을 특징으로 한다.The quick-setting material is 37 to 52 parts by weight of anhydrous gypsum, 10 to 28 parts by weight of calcium aluminate, 10 to 23 parts by weight of C12A7, 5 to 25 parts by weight of CaO, 10 to 20 parts by weight of fly ash, 5 to 25 parts by weight of aluminum hydroxide , Characterized in that it comprises 5 to 12 parts by weight of amorphous silica, 0.3 to 12 parts by weight of a curing accelerator, and 0.1 to 1 part by weight of a high flow agent.
본 발명의 씰재는 일정시간 동안 물성을 유지하고 초기 반응성을 높여 겔화시간을 효과적으로 단축하여 단시간내에 10mm이하의 비카트침 침입량에 도달할 수 있는 겔화 특성을 갖으며, 기공률이 높아 본주입재의 통과는 원활하게 이루어질 수 있게 하여 본주입재 주입시 주입 압력에 의한 강관의 인발, 천공홀의 붕괴 및 역류를 방지하는 효과가 우수하다.The sealing material of the present invention maintains physical properties for a certain period of time, increases initial reactivity, effectively shortens the gelation time, and has a gelling characteristic that can reach the amount of non-catalytic intrusion of 10 mm or less within a short time, and has a high porosity, allowing the main injection material to pass It has a good effect of preventing the drawing of the steel pipe due to the injection pressure, the collapse of the perforated hole, and the reverse flow by making it smooth.
또한 본주입재는 고분말도에 의해 씰재를 통과하여 지반내에 침투할 수 있는 침투성이 우수하며 유동성이 우수하여 지반의 취약부, 균열부 등과 같은 심부까지 충진이 가능하고 고결효과 우수 및 내구성 향상, 고강도의 압축강도 발현이 가능하게 하는 효과가 있다.In addition, the main injection material has excellent permeability to penetrate into the ground by passing through the seal material due to high powderiness, and it has excellent fluidity, so it can fill deep areas such as fragile and cracked parts of the ground. There is an effect that enables the expression of strength.
또한 급결재는 종래의 규산소다(물유리)를 사용함으로 인해 발생하는 강도저하 및 높은 알칼리 함량으로 인한 부식성, 환경성 문제 발생에 비해 고결 후 알칼리 용탈현상이 거의 없어 2차 오염이 없으며 무기질 친환경 재료의 사용으로 친환경성을 갖추고 내구성 우수와 규산소다(물유리) 사용 대비 강도 증진률이 우수하며, 본주입재와 혼합시 수화반응에 의해 에트링자이트가 생성되면서 단시간내에 본주입재와 겔화되어 본주입재의 양생을 촉진시키며 속경성 강도 발현이 가능하게 하는 효과가 있다.In addition, the rapid setting material has no secondary pollution due to little alkali desorption after solidification compared to the occurrence of corrosion and environmental problems due to the strength decrease and high alkali content caused by the use of conventional soda silicate (water glass), and the use of inorganic eco-friendly materials As it has eco-friendliness, has excellent durability, and has an excellent strength increase rate compared to the use of soda silicate (water glass), and when mixed with the main injection material, ettringite is generated by hydration reaction, and gels with the main injection material in a short time to cure the main injection material. It has the effect of facilitating and expressing fast-hardening strength.
또한 씰재, 본주입재, 급결재를 포함하는 강관다단 친환경 속경성 그라우팅용 조성물을 사용할 경우 종래의 작업 싸이클에 비해 36시간 정도를 크게 단축시킬 수 있어 작업시간 및 공기의 단축, 인건비와 공사비 절감, 장비 효율성의 증대를 가져올 수 있는 효과가 있다.In addition, when using a steel pipe multi-stage eco-friendly fast-hardening grouting composition including a sealing material, main injection material, and quick-setting material, it can significantly shorten the working time by 36 hours compared to the conventional work cycle, reducing work time and air, reducing labor and construction costs, and equipment There is an effect that can increase the efficiency.
도 1은 본 발명 강관다단 친환경 속경성 그라우팅용 조성물 중 씰재의 겔화 및 비카트침 침입량에 대한 시험성적서
도 2는 본 발명 강관다단 친환경 속경성 그라우팅용 조성물 중 씰재의 비카트침 침입량과 본주입재 통과 확인을 위한 실험사진
도 3은 본 발명 강관다단 친환경 속경성 그라우팅용 조성물 중 급결재의 겔타임과 호모겔 강도 측정에 대한 시험성적서
도 4는 본 발명 강관다단 친환경 속경성 그라우팅용 조성물을 이용한 작업 싸이클과 종래의 작업 싸이클 비교표1 is a test report for the amount of gelation and non-cart penetration of the sealant in the composition for the steel pipe multi-stage eco-friendly fast-harding grouting of the present invention
2 is an experimental photograph for confirming the amount of non-cart needle penetration of the sealing material and the passage of the main injection material in the composition for the steel pipe multistage eco-friendly fast-hardening grouting of the present invention
3 is a test report for measuring the gel time and homogel strength of the rapid setting material in the composition for the steel pipe multi-stage eco-friendly fast-harding grouting of the present invention
4 is a comparison table of the work cycle and the conventional work cycle using the composition for the steel pipe multi-stage eco-friendly fast-harding grouting of the present invention
본 발명의 강관다단 친환경 속경성 그라우팅용 조성물은 본주입재의 주입전 강관의 외측과 천공홀 사이에 주입되어 팽창 및 충진됨으로써 강관과 지반의 마찰력을 증가시켜 본주입재의 주입시 주입압력에 의한 강관의 인발, 천공홀의 붕괴 및 역류 방지와 본주입재의 주입효율을 높여주기 위한 씰재, 강관 내부에서 가압하여 공급함으로써 강관의 외측과 천공홀 사이로 배출 후 씰재를 통과하여 지반으로 주입되면서 지반 내 균열을 메우고 지반을 일체화시키는 본주입재, 본주입재의 양생을 촉진시키기 위한 급결재로 나뉘어 구성된다.The steel pipe multi-stage eco-friendly fast-hardening grouting composition of the present invention is injected and expanded and filled between the outer and perforated holes of the steel pipe before injection of the main injection material to increase the friction between the steel pipe and the ground to increase the frictional force of the steel pipe by injection pressure during injection of the main injection material. Seal material to prevent drawing and collapse of the hole and to prevent backflow and to increase the injection efficiency of the main injection material, pressurized and supplied from the inside of the steel pipe, discharges between the outside and the hole of the steel pipe, passes through the seal material and is injected into the ground to fill the cracks in the ground It is composed of the main injection material that integrates and the quick setting material to promote the curing of the main injection material.
상기 씰재는 본주입재의 주입이 완료되기 전가지 완전 고결이 된 상태가 아닌 겔화 상태로 존재하여야 한다. 그러나 통상적으로 사용되고 있는 규산소다를 씰재로 사용할 경우 겔 타임을 매우 짧게 할 수는 있지만 경화되는 속도도 매우 빨라져 본주입재를 주입할 경우 씰재가 이미 양생된 상태가 되어 본주입재의 주입이 거의 되지 않는 현상이 발생하게 된다. 따라서 지반내로 밀실하게 충분이 주입이 되고 본주입재의 주입에 영향이 없는 겔상태를 유지하기 위해 상기 씰재는 칼슘설포 알루미네이트 5~18중량부, 석고 8~20중량부, 플라이애시 10~20중량부, 카올리나이트 32~48중량부, 소석회 5~12중량부, 고유동화제 0.1~2중량부, 경화촉진제 0.1~1중량부를 포함하여 구성된다.The seal material should exist in a gelled state, not in a completely consolidated state until the injection of the main injection material is completed. However, when the commonly used soda silicate is used as a sealant, the gel time can be very shortened, but the curing speed is also very fast, so when the main injection material is injected, the sealing material is already cured, so that the injection of the main injection material hardly occurs. This will happen. Therefore, in order to maintain a gel state that is sufficiently injected into the ground tightly and does not affect the injection of the main injection material, the sealing material is 5 to 18 parts by weight of calcium sulfo aluminate, 8 to 20 parts by weight of plaster, 10 to 20 parts by weight of fly ash Parts, 32 to 48 parts by weight of kaolinite, 5 to 12 parts by weight of slaked lime, 0.1 to 2 parts by weight of a high-activating agent, and 0.1 to 1 parts by weight of a curing accelerator.
상기 칼슘설포 알루미네이트는 수화반응 초기 강도발현 물질인 에트링자이트(Ettringite) 형성 반응에 필요한 산화알루미늄의 공급원으로서 다량의 에트링자이트를 수화반응 초기에 효과적으로 생성시켜 겔화시간을 단축시킬 수 있는 것으로, 상기 칼슘설포 알루미네이트는 5중량부 미만이면 에트린자이트의 생성이 미미하고, 18중량부 이상이면 반응속도가 급격히 빨라져 작업시간 확보가 어려워 5~18중량부를 사용하는 것이 바람직하다.The calcium sulfo aluminate is a source of aluminum oxide required for the formation of Ettringite, which is an early strength-expressing material in the hydration reaction, and it is possible to shorten the gelation time by effectively generating a large amount of Etrinsite in the early stage of the hydration reaction. In other words, if the calcium sulfo aluminate is less than 5 parts by weight, the production of ethrinite is minimal, and when it is 18 parts by weight or more, the reaction rate is rapidly increased, and it is preferable to use 5 to 18 parts by weight because it is difficult to secure a working time.
상기 석고와 소석회는 상기 칼슘설포 알루미네이트와 반응하여 겔화시간을 단축시킬 수 있도록 하는 것으로 천연 석고, 배연탈황석고, 페트로 코크스 탈황석고 및 석탄 코크스 탈황석고로 이루어진 그룹으로부터 선택되는 1종 또는 2종 이상의 혼합물일 수 있으며, 강도발현과 최적의 물성상태를 위해 상기 석고는 8~20중량부이며, 상기 소석회는 5~12중량부를 사용하는 것이 바람직하다.The gypsum and slaked lime react with the calcium sulfo aluminate to shorten the gelation time, and one or two or more selected from the group consisting of natural gypsum, flue gas desulfurization gypsum, petroleum coke desulfurization gypsum and coal coke desulfurization gypsum. It may be a mixture, for strength development and optimum physical properties, the gypsum is 8 to 20 parts by weight, and the slaked lime is preferably 5 to 12 parts by weight.
상기 플라이애시는 화력발전소 등에서 연소 후에 남아있는 잔재물인 연소재를 집진기를 이용하여 채취한 산업부산물로, 미분인 플라이 애시의 주요 성분으로는 SiO2, Al2O3, CaO, Fe2O3 등이 포함되어 있다. 상기 플라이애시는 기공률을 높여 본주입재의 원활한 침투가 가능하도록 미분쇄하지 않은 플라이애시를 사용하도록 하며, 상기 플라이애시는 10중량부 미만이면 기공률이 낮아지고 장기강도 발현이 어려우며 20중량부 이상이면 초기강도 발현이 지연될 수 있어 상기 플라이애시는 10~20중량부를 사용하는 것이 바람직하다.The fly ash is an industrial by-product collected by using a dust collector for combustion residue, which is a residue remaining after combustion in a thermal power plant, and the main components of the fine fly ash include SiO2, Al2O3, CaO, and Fe2O3. The fly ash is used to increase the porosity to use fly ash that has not been pulverized to enable smooth penetration of the main injection material. If the fly ash is less than 10 parts by weight, porosity is lowered and long-term strength is difficult to develop, and if it is more than 20 parts by weight, initial Since the expression of strength may be delayed, it is preferable to use 10 to 20 parts by weight of the fly ash.
상기 카올리나이트는 카올린을 주성분으로 함에 따라 흡수성 및 점성이 우수하여 결합강도를 강화시키기 위해 사용하며, 상기 카올리나이트는 32중량부 미만이면 결합강도 강화효과가 미미하고 48중량부 이상이면 압축강도와 내구성이 낮아져 32~48중량부를 사용하는 것이 바람직하다.The kaolinite is used as a main component of kaolin to improve the bonding strength due to its excellent absorbency and viscosity. When the kaolinite is less than 32 parts by weight, the effect of strengthening the binding strength is insignificant, and when it is more than 48 parts by weight, compressive strength and durability are lowered. It is preferable to use 32 to 48 parts by weight.
상기 고유동화제는 CSA 및 플라이애시 등을 분산시켜 사용수량의 감소를 가능하게 하며 입자와 입자 사이에 윤활막을 형성하여 주입성을 향상시키기 위해 사용되고, 상기 고유동화제로는 폴리카르본산계를 사용하도록 한다.The high-flowing agent is used to improve the injectability by dispersing CSA and fly ash, etc., and forming a lubricating film between the particles and the poly-carboxylic acid system. do.
상기 고유동화제는 0.1중량부 미만이면 유동성 증진효과를 얻기 어려우며 2중량부 이상이면 재료분리 현상이 발생하여 0.1~2중량부를 사용하는 것이 바람직하다.If the high fluidization agent is less than 0.1 parts by weight, it is difficult to obtain a fluidity enhancing effect, and when it is 2 parts by weight or more, it is preferable to use 0.1 to 2 parts by weight due to material separation phenomenon.
상기 경화촉진제는 빠른 반응성으로 인해 경화시간을 줄이고 팽창성 및 수축을 최소화하기 하기 위한 것으로 경화촉진제는 리튬 카보네이트, 염화칼슘, MgO, 실리콘 옥사이트 중에서 선택된 1종 이상을 혼합하여 사용하도록 한다.The curing accelerator is intended to reduce curing time and minimize expandability and shrinkage due to rapid reactivity. The curing accelerator is used by mixing one or more selected from lithium carbonate, calcium chloride, MgO, and silicon oxide.
상기 경화촉진제는 0.1중량부 미만이면 경화촉진 효과를 얻기 어려우며 1중량부 이상이면 급격한 경화로 인한 강도특성의 문제가 발생하여 0.1~1중량부 사용하는 것이 바람직하다.If the curing accelerator is less than 0.1 part by weight, it is difficult to obtain a curing accelerator effect, and if it is 1 part by weight or more, it is preferable to use 0.1 to 1 part by weight due to the problem of strength characteristics due to rapid curing.
상기 칼슘설포 알루미네이트, 석고, 소석회, 플라이애시, 카올리나이트, 고유동화제, 경화촉진제를 포함하는 씰재는 일정시간 동안 물성을 유지하고 초기 반응성을 높여 겔화시간을 효과적으로 단축하며, 후기 반응성을 낮추어 본주입재의 통과가 가능할 정도의 저강도를 충분히 유지할 수 있도록 조성된다.The seal material containing the calcium sulfonate aluminate, gypsum, slaked lime, fly ash, kaolinite, high flow agent, and curing accelerator maintains physical properties for a certain period of time and increases initial reactivity to effectively shorten gelation time and lowers late reactivity to lower main re-entry. It is constructed to maintain sufficient low strength to allow passage of the material.
상기 본주입재는 씰재를 용이하게 통과하여 지반내로 밀실하게 충진될 수 있게 칼슘설포 알루미네이트 35~48중량부, 포틀랜드 시멘트 10~20중량부, 슬래그 시멘트 10~20중량부, 슬래그 5~15중량부, 알루미늄 실리케이트 15~25중량부, 고유동화제 0.1~2중량부, 지연제 0.1~1중량부를 포함하여 구성된다.The main injection material is 35 to 48 parts by weight of calcium sulfo aluminate, 10 to 20 parts by weight of Portland cement, 10 to 20 parts by weight of slag cement, 5 to 15 parts by weight of slag so that the sealing material can easily pass through and be filled tightly into the ground. , 15 to 25 parts by weight of aluminum silicate, 0.1 to 2 parts by weight of high-activating agent, and 0.1 to 1 part by weight of retarder.
상기 칼슘설포 알루미네이트, 포틀랜드 시멘트, 슬래그 시멘트, 슬래그는 침투성과 고결효과가 우수하도록 분말도 4000~6000㎠/g인 것을 사용하며, 재료 저항성이 요구되는 본주입재의 결합재로 사용됨으로써 시멘트보다 높은 분말도에 의하여 결합재의 입도를 개선하고 필러효과를 제공할 수 있게 한다.The calcium sulfo aluminate, portland cement, slag cement, and slag are powders of 4000 to 6000
상기 칼슘설포 알루미네이트는 물과 접촉할 때 순식간에 물과 반응하여 에트린자이트 수화물을 생성함으로 시멘트와 혼합할 때 단시간 내에 우수한 압축 강도를 얻을 수 있게 하며, 상기 칼슘설포 알루미네이트는 35중량부 미만이면 충분한 강도 발현을 얻기 어려우며 48중량부 이상이면 빠른 반응시간으로 작업시간 확보가 어려우며 경제성 문제가 있어 35~48중량부 사용하는 것이 바람직하다.The calcium sulfo aluminate reacts with water in an instant upon contact with water to produce ethrinite hydrate to obtain excellent compressive strength in a short time when mixed with cement, and the calcium sulfo aluminate is 35 parts by weight If it is less than, it is difficult to obtain sufficient strength, and if it is more than 48 parts by weight, it is difficult to secure a working time with a fast reaction time, and it is preferable to use 35 to 48 parts by weight due to economic problems.
상기 포틀랜드 시멘트는 보통 포틀랜드 시멘트 또는 조강 포틀랜드시멘트를 사용할 수 있으나 본주입재의 재령 초기강도를 소폭 상승시키고자 할때에는 보통 포틀랜드 시멘트와 조강 포틀랜드 시멘트를 혼합하여 사용하며 상기 포틀랜드 시멘트는 10중량부 미만이면 초기강도 증진 효과를 얻기 어려우며 20중량부 이상이면 경제성 문제가 있어 10~20중량부를 사용하는 것이 바람직하다.The Portland cement can be usually used as Portland cement or crude Portland cement, but when it is desired to slightly increase the initial strength of the main resident, Portland cement and Portland cement are usually mixed and the Portland cement is less than 10 parts by weight. It is difficult to obtain a strength enhancing effect, and if it is 20 parts by weight or more, it is preferable to use 10 to 20 parts by weight because there is an economic problem.
상기 슬래그 시멘트와 슬래그는 산업 부산물을 재활용함에 따라 경제적인 효과와 본주입재의 결합재에 있어 고미분말을 사용함으로써 작업성의 개선과 잠재 수경성 반응에 의한 장기강도 증진 및 공극의 충전이 효과적으로 이루어지게 하는 것으로 상기 슬래그 시멘트와 슬래그는 각각 10~20중량부, 5~15중량부 사용하는 것이 바람직하다.The slag cement and slag are used to improve the workability and improve long-term strength by latent hydraulic reaction and effectively fill the voids by using high-powder powder in the economical effect and the binder of the main injection material by recycling industrial by-products. It is preferable to use 10 to 20 parts by weight and 5 to 15 parts by weight of slag cement and slag, respectively.
상기 알루미늄 실리케이트는 강도증진과 방수성, 작업성 증진을 위해 사용되며 상기 알루미늄 실리케이트는 15중량부 미만이면 강도증진 및 방수성 효과를 얻기 어려우며 25중량부 이상이면 가격만 상승될 뿐 추가 첨가의 효과가 없어 15~25중량부 사용하는 것이 바람직하다.The aluminum silicate is used for strength enhancement, water resistance, and workability enhancement. If the aluminum silicate is less than 15 parts by weight, it is difficult to obtain an effect of increasing strength and water resistance, and if it is more than 25 parts by weight, only the price increases, but there is no effect of additional addition. It is preferred to use ~25 parts by weight.
상기 고유동화제는 CSA 및 포틀랜드 시멘트 등을 분산시켜 사용수량의 감소를 가능하게 하며 입자와 입자 사이에 윤활막을 형성하여 굳지 않은 상태에서의 주입성을 향상시키기 위해 사용되며 고유동화제는 폴리카르본산계 또는 나프탈렌 설폰산염계를 단독 또는 혼합하여 사용하며, 상기 고유동화제는 0.1중량부 미만이면 유동성 증진효과를 얻기 어려우며, 2중량부 이상이면 재료분리 현상이 생겨 0.1~2중량부를 사용하는 것이 바람직하다.The high flow agent is used to improve the injectability in a non-solid state by forming a lubricant film between the particles and dispersing CSA and Portland cement. The acid-based or naphthalene sulfonate-based system is used alone or in combination, and it is difficult to obtain a fluidity enhancing effect when the high flow agent is less than 0.1 part by weight, and if it is 2 parts by weight or more, it is preferable to use 0.1 to 2 parts by weight due to material separation phenomenon. Do.
상기 지연제는 시멘트 수화반응을 억제하여 응결 또는 경화를 지연시키기 위한 것으로 본주입재는 주입 후 초기 강도 발현과 양생시간의 빠른 단축을 실현하기 위함을 목적으로 하나 매우 빠른 응결로 인하여 작업성의 저하를 가져오는 문제가 있어 지연제를 사용하며, 상기 지연제는 구연산, 붕산, 타르타르산 중 1종 이상을 혼합하여 사용한다.The retarder is for retarding condensation or hardening by inhibiting the cement hydration reaction, and the main injection material is intended to realize the initial strength development and rapid reduction of curing time after injection, but has a decrease in workability due to very rapid condensation. There is a problem with the use of a retarder, and the retarder is used by mixing one or more of citric acid, boric acid, and tartaric acid.
상기 지연제는 0.1중량부 미만이면 경화 지연효과를 얻기 어려우며 1중량부 이상이면 응결 또는 경화 촉진에 문제가 있어 0.1~1중량부 사용하는 것이 바람직하다.If the retarder is less than 0.1 part by weight, it is difficult to obtain a curing retardation effect, and when it is 1 part by weight or more, it is preferable to use 0.1 to 1 part by weight because there is a problem in accelerating or curing.
상기 포틀랜드 시멘트, CSA, 슬래그 시멘트, 슬래그, 알루미늄 실리케이트, 고유동화제, 지연제를 포함하는 본주입재는 고분말도에 의해 지반내 침투성이 우수하며 고결효과 우수 및 내구성 증진, 고강도의 압축강도 발현이 가능하도록 조성된다.The main landing material containing the Portland cement, CSA, slag cement, slag, aluminum silicate, high flow agent, and retardant is excellent in permeability in the ground by high powder, excellent in solidification effect and improved durability, high strength compressive strength can be expressed It is made to.
상기 급결재는 본주입재의 경화촉진을 위해 통상적으로 사용하던 규산소다를 사용하지 않아 환경문제 및 내구성 저하, 용탈 등의 문제를 개선하고 본주입재와 혼합하여 사용함으로써 본주입재의 경화시간을 빠르게 단축 단축시키면서 압축 강도는 단시간 내에 높게 발현될 수 있게 무수석고 37~52중량부, 칼슘알루미네이트 10~28중량부, C12A7 10~23중량부, 산화칼슘 5~25중량부, 플라이애시 10~20중량부, 수산화알루미늄 5~25중량부, 비정질 실리카 5~12중량부, 경화촉진제 0.3~12중량부, 고유동화제 0.1~1중량부를 포함하여 구성된다.The quick-setting material does not use soda silicate, which was conventionally used to promote curing of the main injection material, thereby improving environmental problems, durability, problems such as desorption, and mixing it with the main injection material to shorten and shorten the curing time of the main injection material. While compressing, the compressive strength is 37~52 parts by weight of anhydrous gypsum, 10-28 parts by weight of calcium aluminate, 10-23 parts by weight of C12A7, 5-25 parts by weight of calcium oxide, and 10-20 parts by weight of fly ash so that it can be highly expressed in a short time. , 5 to 25 parts by weight of aluminum hydroxide, 5 to 12 parts by weight of amorphous silica, 0.3 to 12 parts by weight of a curing accelerator, and 0.1 to 1 parts by weight of a high flow agent.
상기 무수석고는 시멘트 중의 C3A 또는 슬래그 미분말 중의 Al2O3와The anhydrous gypsum is C 3 A in cement or Al 2 O 3 in fine slag powder.
반응하여 에트린자이트를 생성하는 팽창반응에 의해 경화체의 수축을 보상하고, 내부 조직을 치밀하게 하여 주입재의 압축강도를 상승시키는 역할을 한다. It reacts to compensate for shrinkage of the cured body by an expansion reaction that produces ethrinite, and serves to increase the compressive strength of the injection material by compacting the internal structure.
상기 무수석고는 37중량부 미만이면 경화체의 수축보상이 미미하며, 52중량부 이상이면 에트링자이트의 과다 생성에 의한 과팽창 발생 문제가 생겨 37~52중량부 사용하는 것이 바람직하다.If the anhydrous gypsum is less than 37 parts by weight, the shrinkage compensation of the cured body is insignificant, and if it is more than 52 parts by weight, a problem of over-expansion caused by excessive generation of ethringite occurs, and it is preferable to use 37 to 52 parts by weight.
상기 칼슘알루미네이트는 무기질계 초속경 재료로서 시멘트와 혼합할 때 수일 혹은 수 십일에 얻어지는 압축강도를 수 시간 내에 얻을 수 있게 하도록 사용되며, 상기 칼슘알루미네이트는 10중량부 미만일 경우 초기강도 발현 및 내구성 발현의 문제가 있고, 28중량부 이상이면 급격한 경화로 인해 작업성 저하 문제가 있어 10~28중량부 사용하는 것이 바람직하다.The calcium aluminate is an inorganic superhard material, and is used to obtain the compressive strength obtained within days or days when mixed with cement within a few hours, and the calcium aluminate exhibits initial strength and durability when less than 10 parts by weight There is a problem of expression, and if it is 28 parts by weight or more, it is preferable to use 10 to 28 parts by weight since there is a problem of reduced workability due to rapid curing.
상기 C12A7는 광물질로 이루어지며 물과 빠르게 반응하고 높은 열을 발생시키면서 겔화시간이 단축될 수 있게 하는 것으로 상기 C12A7는 10중량부 미만이면 겔화반응 효과가 미미하며 23중량부 이상이면 겔화반응에 의해 유동성 저하를 유발하게 되어 5~25중량부 사용하는 것이 바람직하다.The C12A7 is made of a mineral material and reacts quickly with water and generates high heat, so that the gelation time can be shortened. The C12A7 has a gelation effect of less than 10 parts by weight, and fluidity by gelation reaction when more than 23 parts by weight. It is preferable to use 5 to 25 parts by weight since it causes a drop.
상기 산화칼슘은 알칼리 자극제로 경화를 촉진하기 위해 사용되며 5중량부 미만이면 초기강도 확보를 위한 강도성능을 충족하기 어려우며 25중량부 이상이면 물과 혼합 후 빠른 겔형성으로 인해 작업성을 떨어뜨려 5~25중량부를 사용하는 것이 바람직하다.The calcium oxide is used to promote curing as an alkali stimulant. If it is less than 5 parts by weight, it is difficult to meet the strength performance to secure the initial strength, and if it is more than 25 parts by weight, the workability is reduced due to the rapid gel formation after mixing with water 5 It is preferred to use ~25 parts by weight.
상기 플라이애쉬는 경화체의 장기강도를 증진시키며 경화체의 수화조직을 치밀하게 하여 화학저항성과 내구성을 증대시키기 위해 사용되며, 상기 플라이애시는 10중량부 미만이면 장기강도 발현과 내구성 개선 효과가 미미하며, 20중량부 이상이면 초기강도 발현이 지연될 수 있어 10~20중량부 사용하는 것이 바람직하다.The fly ash is used to enhance the long-term strength of the cured body and to increase the chemical resistance and durability by compacting the hydration structure of the cured body, and if the fly ash is less than 10 parts by weight, the effect of improving long-term strength and improving durability is negligible, If it is 20 parts by weight or more, it is preferable to use 10 to 20 parts by weight because the initial strength expression may be delayed.
상기 수산화알루미늄은 수산화알루미늄은 내부에 존재하는 염분이나 외부로부터 침투한 염화물 이온을 프리델염(Fridel's salt) 염으로 고정화하여 염분침투를 차단하는 작용을 하며, 시멘트의 수산화칼슘과 반응을 하여 칼슘알루미늄-하이드로옥사이드를 생성하고, 생성된 칼슘알루미늄수화물은 비표면적이 큰 다공성의 수화물로서 침투한 수용성의 염소이온에 대한 흡착력이 크고 염소이온을 고정화시키는 작용을 한다. 상기 수산화알루미늄은 5중량부 미만이면 염분침투를 차단하는 효과가 미미하며, 25중량부 이상이면 겔화반응에 의해 유동성 저하를 유발하게 되어 5~25중량부 사용하는 것이 바람직하다.The aluminum hydroxide acts to block salt penetration by immobilizing the salts existing inside or chloride ions penetrating from the outside into Friedel's salt, and reacting with calcium hydroxide in cement to react with calcium aluminum-hydro. Oxide is produced, and the produced calcium aluminum hydrate is a porous hydrate having a large specific surface area, and has a high adsorption capacity to water-soluble chlorine ions penetrated and functions to immobilize chlorine ions. If the aluminum hydroxide is less than 5 parts by weight, the effect of blocking salt penetration is insignificant, and when it is 25 parts by weight or more, it is preferable to use 5 to 25 parts by weight because it causes a decrease in fluidity by a gelation reaction.
상기 비정질 실리카는 내구성 및 장기 강도 향상을 위해 사용되며, 상기 비정질 실리카는 5중량부 미만이면 내구성 향상에 큰 효과가 없고 25중량부 이상이면 초기 압축강도 등을 감소시키거나 흐름성을 감소시키는 등 주입 작업성에 낮춰 5~25중량부를 사용하는 것이 바람직하다.The amorphous silica is used for improving durability and long-term strength, and if the amorphous silica is less than 5 parts by weight, there is no great effect on improving durability, and if it is more than 25 parts by weight, injection such as reducing initial compressive strength or reducing flowability is injected. It is preferable to use 5 to 25 parts by weight to lower workability.
상기 경화촉진제는 빠른 반응성으로 인해 경화시간을 줄이고 팽창성 및 수축을 최소화하기 하기 위해 리튬 카보네이트, 황산칼륨, 황산마그네슘, 염화칼슘 중에서 선택된 1종 이상을 혼합하여 사용하도록 한다.The curing accelerator is used by mixing one or more selected from lithium carbonate, potassium sulfate, magnesium sulfate, and calcium chloride in order to reduce curing time and minimize expandability and shrinkage due to rapid reactivity.
상기 경화촉진제는 0.1중량부 미만이면 경화촉진 효과를 얻기 어려우며 1중량부 이상이면 급격한 경화로 인한 강도특성의 문제가 발생하여 0.1~1중량부 사용하는 것이 바람직하다.If the curing accelerator is less than 0.1 part by weight, it is difficult to obtain a curing accelerator effect, and if it is 1 part by weight or more, it is preferable to use 0.1 to 1 part by weight due to the problem of strength characteristics due to rapid curing.
상기 고유동화제는 무수석고 및 칼슘알루미네이트 등의 입자와 입자 사이에 윤활막을 형성하여 주입성을 향상시키기 위해 사용되며 고유동화제로는 폴리카르본산계 또는 나프탈렌 설폰산염계 또는 이들을 혼합하여 사용하도록 한다.The high-purifying agent is used to improve the injectability by forming a lubricating film between particles such as anhydrous gypsum and calcium aluminate, and the high-purifying agent is used as a polycarboxylic acid-based or naphthalene sulfonate-based or a mixture thereof. .
상기 고유동화제는 0.1중량부 미만이면 유동성 증진효과를 얻기 어려우며, 2중량부 이상이면 재료분리 현상이 생겨 0.1~2중량부를 사용하는 것이 바람직하다.The high fluidization agent is less than 0.1 parts by weight, it is difficult to obtain a fluidity enhancing effect, and when it is 2 parts by weight or more, it is preferable to use 0.1 to 2 parts by weight as a material separation phenomenon occurs.
상기와 같이 무수석고, 칼슘알루미네이트, C12A7, 산화칼슘, 플라이애시, 수산화알루미늄, 비정질 실리카, 경화촉진제, 고유동화제를 포함하는 급결재는 종래의 규산소다(물유리)를 사용함으로 인해 발생하는 강도저하, 지속적인 수분공급시 석회침출로 인한 방수특성 감소, 높은 알칼리 함량으로 인한 부식성, 환경성 문제에 반해, 고결 후 알칼리 용탈현상이 거의 없음에 따라 2차 오염이 없으며, 무기질 친환경 재료의 사용으로 친환경성을 갖추며 체적변동이 없음에 따른 내구성이 우수와 규산소다(물유리) 대비 강도 증진률이 우수하고 무기질 재료 사용에 따른 초기 및 후기 강도의 지속적 발현으로 우수한 안정성을 얻을 수 있다.As described above, quick-setting materials including anhydrous gypsum, calcium aluminate, C12A7, calcium oxide, fly ash, aluminum hydroxide, amorphous silica, a curing accelerator, and a high-activating agent are the strengths generated by using conventional soda silicate (water glass). Deterioration, decrease in waterproofing properties due to lime leaching during continuous water supply, corrosion due to high alkali content, and environmental problems, there is no secondary pollution due to almost no alkali desalination after solidification, and is eco-friendly by using inorganic eco-friendly materials It has excellent durability with no volume fluctuation, excellent strength enhancement rate compared to soda silicate (water glass), and excellent stability through continuous expression of early and late strengths according to the use of inorganic materials.
상기 급결재는 본주입재의 경화촉진을 위해 본주입재와 믹싱되어 사용되며 강관내에서 1차적으로 본주입재의 주입이 70%이상 이루어진 상태에서 2차적으로 후 주입되는 것으로 본주입재와 급결재는 일정량의 물을 각각 투입 및 교반하여 슬러리(모르타르)화시킨 후 슬러리화된 본주입재와 급결재를 1:1로 믹싱하여 사용하며, 상기 슬러리화된 본주입재와 급결재는 믹싱전에는 각 재료들이 3시간 이상 반응 없이 겔화되지 않고 유동성을 유지하고 있는 상태이나 본주입재와 급결재를 함께 믹싱하면 40~60초에 겔화되기 시작하여 주입작업이 용이하고 단시간에 2Mpa 이상의 압축강도 발현이 가능하게 한다.The quick-setting material is used by mixing with the main-injection material to promote hardening of the main-injection material. The main-injection material and the quick-injection material are injected after being secondarily injected in a state where 70% or more of the main-injection material is first injected into the steel pipe. Slurry (mortar) is formed by adding and stirring water, respectively, and then the slurried main injection material and the quick setting material are mixed in a 1:1 ratio, and the slurried main injection material and the quick setting material are mixed for 3 hours or more before mixing. When the mixture is mixed with the main injection material and the quick setting material without maintaining gelation without reaction and gelation, gelation starts in 40 to 60 seconds, making it easy to inject and expressing a compressive strength of 2 Mpa or more in a short time.
이는, 칼슘알루미네이트를 주성분으로 하는 시멘트계 광물계 무기질 급결재와 고분말의 본주입재 시멘트가 만나 수화반응을 하여 에트링자이트를 생성함으로써 일정수준의 겔타임과 속경성 강도 발현이 가능하게 하기 때문이다.This is because a cement-based mineral-based inorganic quick-setting material containing calcium aluminate as the main component and a high-powder main-injection cement meet to hydrate to generate ethringite, thereby allowing a certain level of gel time and rapid-hardening strength to be expressed. .
상기 씰재, 본주입재, 급결재는 각각 프리믹스 타입으로 포장되어 현장에서 일정량의 물과 혼합하여 사용하게 함으로써 품질관리가 용이하고 공기단축 및 공사비 절감 효과를 얻을 수 있게 한다.The seal material, the main injection material, and the quick setting material are each packaged in a premix type so that they can be mixed with a certain amount of water in the field to facilitate quality control and reduce air shortening and construction cost reduction.
이하, 본 발명의 강관다단 친환경 속경성 그라우팅 조성물의 씰재, 본주입재, 급결재에 대한 바람직한 실시예를 설명한다.Hereinafter, preferred embodiments of the seal material, the main injection material, and the quick setting material of the steel pipe multi-stage eco-friendly fast-hardening grouting composition of the present invention will be described.
<실시예 1><Example 1>
칼슘설포 알루미네이트 5~18중량부, 석고 8~20중량부, 소석회 5~12중량부, 플라이애시 10~20중량부, 카올리나이트 32~48중량부, 고유동화제 0.1~2중량부, 경화촉진제 0.1~1중량부를 강제믹서에 넣고 물 120~150중량부를 투입하여 재료들을 충분히 교반시켜 슬러리화(모르타르)된 씰재를 제조하였다.5 to 18 parts by weight of calcium sulfo aluminate, 8 to 20 parts by weight of gypsum, 5 to 12 parts by weight of slaked lime, 10 to 20 parts by weight of fly ash, 32 to 48 parts by weight of kaolinite, 0.1 to 2 parts by weight of superplasticizer, curing accelerator 0.1 to 1 part by weight into a forced mixer and 120 to 150 parts by weight of water was added to sufficiently stir the materials to prepare a slurryed (mortar) seal material.
이때, 상기 고유동화제로는 폴리카르본산계를 사용하고, 경화촉진제로는 리튬 카보네이트, 염화칼슘, MgO, 실리콘 옥사이드 중에서 1종 이상을 혼합하여 사용하였다.At this time, a polycarboxylic acid system was used as the high flow agent, and one or more of lithium carbonate, calcium chloride, MgO, and silicon oxide were used as a curing accelerator.
<시험예1><Test Example 1>
상기 실시예 1에서 제조된 씰재의 시편을 제작하고 비카트침 침입도(비카트침 침입량이 30초간 최대 10mm이하 도달)와 겔화시간에 대한 시험을 실시하였으며, 비카트침 침입도는 KS L ISO 9597 : 2009 시멘트 응결시험 방법에 의거하여 측정하였다.A specimen of the seal material prepared in Example 1 was prepared and tested for non-catch penetration (non-catch penetration reached up to 10 mm for 30 seconds) and gelation time, and the non-catch penetration was KS L ISO 9597: Measured according to the 2009 cement setting method.
시험결과 도 1과 같이, 씰재는 2시간 40분 이내에 겔화가 형성되고 비카트침의 침입도가 10mm이하(한국철도시설공단의 시방서 기준)에 도달할 때까지 소요되는 시간은 3시간 이내인 것을 알 수 있다. 이는 통상적인 씰재의 경우 비카트침 침입량이 최대 10mm 이하에 도달되려면 23ㅁ1 시간정도가 소요되는 것과 비교하였을 때 본 발명의 씰재는 10mm이하의 비카트침의 침입량에 도달되는 시간이 크게 단축된 것을 알 수 있고 그로인해 본 발명의 씰재는 통상적인 씰재에 비해 양생이 빠르게 이루어 질 수 있다는 것을 알 수 있다.As shown in Fig. 1, the time required for the seal material to reach gelation within 2 hours and 40 minutes and the penetration rate of the non-cart needle reached 10 mm or less (based on the specifications of the Korea Railroad Authority) is within 3 hours. Able to know. This is a typical seal material, compared to the time it takes about 23 ㅁ 1 hour to reach the maximum penetration of the non-cart needle up to 10 mm, the seal material of the present invention significantly reduces the time to reach the penetration of the non-catch needle less than 10 mm It can be seen that the seal material of the present invention can be seen that curing can be made faster than the conventional seal material.
또한 도 2와 같이 본 발명의 씰재는 기공률이 높아 단시간 내에 비카트침의 침입도는 10mm 이하에 도달하면서도 본주입재의 통과는 원활하게 이루어지는 것을 알 수 있다.In addition, as shown in Figure 2, the seal material of the present invention has a high porosity, and it can be seen that the penetration rate of the non-cart needle within a short time reaches 10 mm or less, but the passage of the main injection material is smooth.
<실시예 2><Example 2>
칼슘설포 알루미네이트 35~48중량부, 포틀랜드 시멘트 10~20중량부, 슬래그 시멘트 10~20중량부, 슬래그 5~15중량부, 알루미늄 실리케이트 15~25중량부, 고유동화제 0.1~2중량부, 지연제 0.1~1중량부를 강제믹서에 넣고 물 120~150중량부를 투입하여 재료들을 충분히 교반시켜 슬러리화(모르타르)된 본주입재를 제조하였다. 35 to 48 parts by weight of calcium sulfo aluminate, 10 to 20 parts by weight of Portland cement, 10 to 20 parts by weight of slag cement, 5 to 15 parts by weight of slag, 15 to 25 parts by weight of aluminum silicate, 0.1 to 2 parts by weight of superplasticizer, 0.1 to 1 part by weight of the retarder was added to a forced mixer, and 120 to 150 parts by weight of water was added to sufficiently stir the materials to prepare a slurry (mortar) main injection material.
이때, 상기 고유동화제로는 폴리카르본산계 또는 나프탈렌 살폰산염계를 사용하고, 지연제로는 구연산, 붕산, 타르타르산 중 1종 이상을 혼합하여 사용하였다.At this time, polycarboxylic acid-based or naphthalene salfonate-based was used as the high-activating agent, and at least one of citric acid, boric acid, and tartaric acid was used as a retarder.
<실시예 3><Example 3>
무수석고 37~52중량부, 칼슘알루미네이트 10~28중량부, C12A7 10~23중량부, CaO 5~25중량부, 플라이애시 10~20중량부, 수산화알루미늄 5~25중량부, 비정질 실리카 5~12중량부, 경화촉진제 0.3~12중량부, 고유동화제 0.1~1중량부를 강제믹서에 넣고 물 120~150중량부를 투입하여 재료들을 충분히 교반시켜 슬러리화(모르타르)된 급결재를 제조하였다.Anhydrous gypsum 37-52 parts by weight, calcium aluminate 10-28 parts by weight, C12A7 10-23 parts by weight, CaO 5-25 parts by weight, fly ash 10-20 parts by weight, aluminum hydroxide 5-25 parts by weight, amorphous silica 5 ~12 parts by weight, 0.3-12 parts by weight of curing accelerator, 0.1-1 part by weight of high flow agent was added to a forced mixer, and 120-150 parts by weight of water was added to sufficiently stir the materials to prepare a slurryed (mortar) rapid setting material.
이때, 경화촉진제는 리튬 카보네이트, 황산칼륨, 황산마그네슘, 염화칼슘 중에서 1종 이상을 혼합하여 사용하였으며, 고유동화제는 폴리카르본산계 또는 나프탈렌 설폰산염계를 사용하였다.At this time, the curing accelerator was used by mixing one or more of lithium carbonate, potassium sulfate, magnesium sulfate, and calcium chloride, and a polycarboxylic acid-based or naphthalene sulfonate-based was used as the high-flowing agent.
<실시예 4><Example 4>
실시예 2에서 제조된 본주입재 모르타르에 실시예 3에서 제조된 급결재 모르타를 강제믹서에 1:1의 비율로 투입 및 교반시켜 속경성 그라우트재를 제조한다.The quick-injection mortar prepared in Example 3 was injected into the main injection material mortar prepared in Example 2 into a forced mixer at a ratio of 1:1, and stirred to prepare a quick-hard grout material.
<시험예2><Test Example 2>
실시예 2에 의해 제조된 본주입재와 실시예 3에 의해 제조된 급결재를 1:1로 혼합하여 속경성 그라우트재 시편을 제작하고 겔 타임과 호모겔 강도에 대한 시험을 실시하였으며, 시험은 KS L ISO 679 : 2006의 시멘트 강도시험 방법에 의거하여 측정하였다.The main injection material prepared in Example 2 and the quick setting material prepared in Example 3 were mixed in a 1:1 ratio to prepare a quick-hard grout material specimen and tested for gel time and homogel strength. It was measured according to the method for testing the cement strength of L ISO 679:2006.
시험결과 도 3과 같이, 본 발명의 속경성 그라우트재는 겔 타임 55초이며 호모겔 강도는 2시간 후 2.0Mpa, 4시간 후 2.8Mpa, 6시간 후 3.1Mpa로 2시간만에 2.0Mpa 이상의 압축강도를 얻을 수 있는 것을 알 수 있다.As shown in Fig. 3, the fast-growing grout material of the present invention has a gel time of 55 seconds, and the homogel strength is 2.0 Mpa after 2 hours, 2.8 Mpa after 4 hours, and 3.1 Mpa after 6 hours. You can see that you can get
이는, 칼슘알루미네이트를 주성분으로 하는 시멘트계 광물계 무기질 급결재와 고분말의 본주입재 시멘트가 만나 수화반응을 하여 에트링자이트를 생성함으로써 우수한 수준의 겔 타임과 속경성 강도 발현이 가능하기 때문인 것을 판단되며, 그로 인해 통상의 그라우트재는 주입 후 18시간 이상의 양생시간이 걸리는 것이 비해 본 발명의 본주입재와 급결재가 혼합되어 제조된 속경성 그라우트재는 주입 후 양생이 초속으로 이루어지고 2Mpa 이상의 초기강도 발현 또한 2시간 이내에 이루질 수 있게 한다.This is because the cement-based mineral-based inorganic quick-setting material containing calcium aluminate as the main component and the main powder-injected cement meet to form hydrating reaction to produce ettringite. Due to this, the conventional grout material takes 18 hours or more of curing time after injection, whereas the fast-growing grout material prepared by mixing the main injection material of the present invention and a quick-setting material is cured after injection, and the initial strength of 2Mpa or more is also expressed. It should be achieved within 2 hours.
본 발명의 씰재, 본주입재, 급결재를 포함하는 강관다단 친환경 속경성 그라우팅용 조성물을 사용할 경우 도 4에 나타난 바와 같이, 종래의 작업 싸이클에 비해 36시간 정도를 크게 단축시킬 수 있어 이는 작업시간 및 공기의 단축과 인건비, 공사비절감, 장비 효율성의 증대를 가져올 수 있게 한다.When using the composition for the steel pipe multi-stage eco-friendly fast-harding grouting including the sealing material, the main injection material, and the quick-setting material of the present invention, as shown in FIG. 4, it can significantly shorten the working time by 36 hours compared to the conventional working cycle, which means that the working time and It can shorten the air, reduce labor costs, reduce construction costs, and increase equipment efficiency.
본 발명은 도면에 도시된 실험예들을 참고로 설명되었으나 이는 예시적인 것에 불과하며, 당해 기술분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 다른 실험예가 가능하다는 점을 이해할 것이다. 또한 본 발명이 속하는 기술분야의 통상의 지식을 가진 자는 본 발명의 기술적 사상이나 필수적인 특징을 변경하지 않고서 다른 구체적인 형태로 쉽게 변형이 가능하다는 것을 이해할 수 있을 것이다. 그러므로 이상에서 기술한 실시예들은 모든 면에서 예시적인 것이며 한정적이 아닌 것으로 이해해야만 하고, 본 발명의 진정한 기술적 보호 범위는 첨부된 청구범위의 기술적 사상에 의하여 정해져야 할 것이다.The present invention has been described with reference to the experimental examples shown in the drawings, but this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other experimental examples are possible therefrom. In addition, a person having ordinary knowledge in the technical field to which the present invention pertains will be able to understand that it can be easily modified to other specific forms without changing the technical spirit or essential features of the present invention. Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive, and the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.
Claims (7)
칼슘설포 알루미네이트 35~48중량부, 포틀랜드 시멘트 10~20중량부, 슬래그 시멘트 10~20중량부, 슬래그 5~15중량부, 알루미늄 실리케이트 15~25중량부, 고유동화제 0.1~2중량부, 지연제 0.1~1중량부로 조성되는 본주입재와,
무수석고 37~52중량부, 칼슘알루미네이트 10~28중량부, C12A7 10~23중량부, CaO 5~25중량부, 플라이애시 10~20중량부, 수산화알루미늄 5~25중량부, 비정질 실리카 5~12중량부, 경화촉진제 0.3~12중량부, 고유동화제 0.1~1중량부로 조성되는 급결재로 이루어지며,
강관내에 1차적으로 본주입재의 주입이 70% 이루어진 상태에서 상기 본주입재 조성물 100 중량부에 대해 물 120~150중량부를 혼합하여 모르타르로 제조하고, 상기 급결재 조성물 100중량부에 대해 물 120~150중량부를 혼합하여 모르타르로 제조한 후 각 본주입재 모르타르와 급결재 모르타르를 1:1로 혼합하여 강관내에 2차적으로 후주입하여 사용되게 하는 초속경 조성물이 구성되고,
상기 고유동화제는 폴리카르본산계 또는 나프탈렌 설폰산염계 또는 이들의 혼합물이며,
상기 지연제는 구연산, 붕산, 타르타르산 중에서 선택된 1이상의 혼합물이고,
상기 경화촉진제는 리튬 카보네이트, 황산칼륨, 황산마그네슘, 염화칼슘, MgO, 실리콘 옥사이드 중에서 선택된 1종이상의 혼합물이며,
상기 칼슘설포 알루미네이트, 포틀랜드 시멘트, 슬래그 시멘트, 슬래그는 각 분말도 4000~6000㎠/g인 것을 특징으로 하는 강관다단 친환경 속경성 그라우팅용 조성물.5 to 18 parts by weight of calcium sulfo aluminate, 8 to 20 parts by weight of gypsum, 5 to 12 parts by weight of slaked lime, 10 to 20 parts by weight of fly ash, 32 to 48 parts by weight of kaolinite, 0.1 to 2 parts by weight of superplasticizer, curing accelerator Seal material composed of 0.1 to 1 part by weight,
35 to 48 parts by weight of calcium sulfo aluminate, 10 to 20 parts by weight of Portland cement, 10 to 20 parts by weight of slag cement, 5 to 15 parts by weight of slag, 15 to 25 parts by weight of aluminum silicate, 0.1 to 2 parts by weight of superplasticizer, Main injection material composed of 0.1 to 1 part by weight of retarder,
Anhydrous gypsum 37-52 parts by weight, calcium aluminate 10-28 parts by weight, C12A7 10-23 parts by weight, CaO 5-25 parts by weight, fly ash 10-20 parts by weight, aluminum hydroxide 5-25 parts by weight, amorphous silica 5 ~12 parts by weight, 0.3~12 parts by weight of curing accelerator, and 0.1~1 parts by weight of high-activating agent.
In the state in which the injection of the main injection material is primarily 70% in the steel pipe, 120 to 150 parts by weight of water is mixed with 100 parts by weight of the main injection composition to prepare mortar, and 120 to 150 water with respect to 100 parts by weight of the quick-setting composition After mixing the parts by weight to prepare a mortar, the composition is composed of a super-fast diameter to be used by secondary injection into the steel pipe by mixing the main mortar and quick-curing mortar 1:1.
The high-mobilization agent is a polycarboxylic acid-based or naphthalene sulfonate-based or a mixture thereof,
The retarder is a mixture of one or more selected from citric acid, boric acid, tartaric acid,
The curing accelerator is a mixture of one or more selected from lithium carbonate, potassium sulfate, magnesium sulfate, calcium chloride, MgO, silicon oxide,
The calcium sulfo aluminate, Portland cement, slag cement, slag is a steel pipe multi-stage environment-friendly fast-harding grouting composition, characterized in that each powder is also 4000 to 6000 cm 2 /g.
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| KR102199931B1 (en) | 2020-09-04 | 2021-01-11 | 주식회사 대광소재 | Two component type grouting composition enabling early high strength development for tunnel grouting reinforcement with steel pipe and tunnel grouting reinforcement method with steel pipe using the same |
| KR102199938B1 (en) * | 2020-09-04 | 2021-01-11 | 주식회사 대광소재 | One component type environment-friendly quick-hardening grout composition for tunnel grouting reinforcement with steel pipe and tunnel grouting reinforcement method using the same |
| KR102241729B1 (en) * | 2020-09-14 | 2021-04-19 | 천성건설㈜ | rapid hardening grout material for ground reinforcement and construction method using the same |
| KR102235910B1 (en) * | 2020-09-28 | 2021-04-07 | 정희갑 | Ultra auick hardening eco-friendly soil greuting material |
| KR20220043317A (en) | 2020-09-29 | 2022-04-05 | 동일씨엠 주식회사 | Sealing material and main injection material composition for steel pipe reinforcing multi stage grouting and grouting method using the same |
| KR102471506B1 (en) | 2020-09-29 | 2022-11-28 | 동일씨엠 주식회사 | Sealing material and main injection material composition for steel pipe reinforcing multi stage grouting and grouting method using the same |
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| KR102301617B1 (en) * | 2021-02-09 | 2021-09-14 | 주식회사 에이지 | Quick-hardening grout composition for multi-step grouting reinforcement with steel pipe and multi-step grouting reinforcement method using the same |
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| CN115925374A (en) * | 2022-11-24 | 2023-04-07 | 临海市忠信新型建材有限公司 | Quick-hardening early-strength cement-based grouting material for stabilizing bridge support base plate and preparation method thereof |
| KR102589566B1 (en) | 2023-02-13 | 2023-10-17 | (주)나다건설 | Grout injection material for grouting of steel pipe and constructing method for steel pipe using the grout injection material |
| CN116425492A (en) * | 2023-03-29 | 2023-07-14 | 中铁建华南建设(广州)高科技产业有限公司 | Grouting composition for shield synchronous grouting, shield synchronous grouting system, method and application |
| CN116425492B (en) * | 2023-03-29 | 2024-04-05 | 中铁建华南建设(广州)高科技产业有限公司 | Grouting composition for shield synchronous grouting, shield synchronous grouting system, method and application |
| CN116514521A (en) * | 2023-04-12 | 2023-08-01 | 河北充填采矿技术有限公司 | Industrial solid waste-based water-control grouting material and preparation method and use method thereof |
| KR102660316B1 (en) * | 2023-10-18 | 2024-04-24 | 주식회사 유성이엔씨 | Anchor injection material for ground reinforcement |
| CN117534427A (en) * | 2023-11-21 | 2024-02-09 | 美安新能源(江苏)有限公司 | Five-super inorganic cementing material and preparation method of product thereof |
| KR102718941B1 (en) | 2024-06-24 | 2024-10-18 | 한일콘(주) | A grout composition for umbrella arch method and grouting reinforcement method using the same |
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