KR20040055950A - A structure block and it's fabrication method for reinforcing soft ground - Google Patents

A structure block and it's fabrication method for reinforcing soft ground

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Publication number
KR20040055950A
KR20040055950A KR1020020082439A KR20020082439A KR20040055950A KR 20040055950 A KR20040055950 A KR 20040055950A KR 1020020082439 A KR1020020082439 A KR 1020020082439A KR 20020082439 A KR20020082439 A KR 20020082439A KR 20040055950 A KR20040055950 A KR 20040055950A
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KR
South Korea
Prior art keywords
block
weight
soft ground
binder
vermiculite
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KR1020020082439A
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Korean (ko)
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KR100523247B1 (en
Inventor
임홍수
김성준
전용진
한우식
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임홍수
김성준
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Priority to KR10-2002-0082439A priority Critical patent/KR100523247B1/en
Publication of KR20040055950A publication Critical patent/KR20040055950A/en
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Publication of KR100523247B1 publication Critical patent/KR100523247B1/en

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • 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
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/14—Minerals of vulcanic origin
    • C04B14/18—Perlite
    • C04B14/185—Perlite expanded
    • 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
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/20—Mica; Vermiculite
    • C04B14/204—Mica; Vermiculite expanded
    • 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
    • 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
    • C04B2111/40—Porous or lightweight materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Road Paving Structures (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)

Abstract

PURPOSE: A block for soft ground structure is provided, to obtain a block which is environmentally friendly and flame retardant and has a good strength. CONSTITUTION: The block comprises 1-98 wt% of a foamed pearlite; 1-99 wt% of a foamed vermiculite; and 1-10 wt% of a binder. Preferably the binder comprises 10-90 wt% of silicon oxide; 4-30 wt% of aluminium oxide; 5-15 wt% of sodium silicate; and 1-10 wt% of vegetable fiber. The block is prepared by pulverizing pearlite and vermiculite; foaming the pulverized one at a temperature of 760-1,200 deg.C to form a foam; mixing silicon oxide, aluminium oxide, sodium silicate and vegetable fiber to prepare a binder; and mixing the obtained foam and the binder. Preferably the block has a compression strength of 50-150 kg/cm¬2.

Description

연약지반 구조용 블록{A structure block and it's fabrication method for reinforcing soft ground}A structure block and it's fabrication method for reinforcing soft ground}

본 발명은 연약지반 구조용 블록에 관한 것으로, 특히 발포 펄나이트나 발포질석을 이용하여 도로공사나 기반 기초공사등 연약지반의 구조용으로 사용할 수 있도록 한 연약지반 구조용 블록에 관한 것이다.The present invention relates to a soft ground structural block, and more particularly to a soft ground structural block that can be used for structural use of the soft ground, such as road construction or foundation foundations using foamed pulite or expanded vermiculite.

종래의 토목공사에 있어서의 EPS공법은 토압 경감을 위한 교대 및 옹벽의 뒷채움재로, 또 열악 지반상의 하중 경감을 위한 성토재료로서 EPS 블록을 쌓아 적층 시키는 공법으로서, 기존의 EPS 공법은 스티로폼 블럭을 토목, 건축분야인 토목공사, 구조물 공사, 혹은 조경공사 등에 사용하고 있으며, 초경량성, 내압축성 자립성, 내수성 및 시공성 등의 특징을 유효하게 활용한 공법이다.The conventional EPS method is a method of stacking and stacking EPS blocks as alternating materials for reducing earth pressure and retaining walls of retaining walls, and filling materials for reducing loads on poor soils. It is used in civil engineering, civil engineering, structural construction, or landscaping, and it is a method that effectively utilizes features such as ultra-light weight, compression resistance independence, water resistance, and workability.

또한, EPS공법을 이용하는 도로공사에서 도로의 지반을 다지기 위한 성토제로서 스티로폼 블럭이 사용되는 바, 이러한 스티로폼 블럭을 경량성토 등에 적용할 때, 지하수위기 높은 장소나 홍수수위가 높아지는 경우 등 EPS층에 부력이 작용하여 성토층의 안정이 보장되지 못하는 경우가 종종 있었다. 이는 EPS가 경량이고 흡수성이 상당히 적기 때문에 이 스티로폼 블럭이 수면밑에 위치한 경우에는 큰 부력이 발생할 뿐아니라 특히 배수성좋지 않아 많은 문제점을 안고 있다.In addition, the styrofoam block is used as a soil filling material for compacting the road ground in the road construction using the EPS method. When the styrofoam block is applied to light soil, etc., it is applied to the EPS layer such as a place having high groundwater level or a flood level. The buoyancy forces often prevented the stability of the fill layer. This is because EPS is light weight and considerably less absorbent, so when the styrofoam block is located under the water, large buoyancy is generated, and in particular, the drainage is not good, which causes a lot of problems.

이와같은 문제점을 해소하기 이한 한 방편으로는 즉, 성토제 예컨대, 스티로폼 블럭에 미치는 부럭을 경감하기 위해서는 물을 성토제층에 만수시키는 구조가 바람직하지만 이는 수평방향에 대한 불안정, 재료의 생산곤란 등의 어려움이 있었던 것이다.In order to alleviate such problems, namely, in order to reduce the impact on the landfill agent, for example, the styrofoam block, a structure in which water is filled with the landfill layer is preferable. There was a difficulty.

한편, 스티로폼 블록 자체는 강도가 약하고 압축될 염려가 있게되며, 가연성 으로 열에 취약하고 환경 오염문제등을 일으키는 문제점이 있어 환경친화적이지 못하다.On the other hand, the styrofoam block itself is weak in strength and may be compressed, it is not environmentally friendly because it is flammable and vulnerable to heat and environmental pollution problems.

본 발명은 발포 펄나이트나 발포 질석을 이용하여 연약지반 구조용 블록을 제공함으로써, 임의의 형태 및 크기로 제작하여 하중경감 대책 및 토압저감대책 혹은 급속시공 및 증축공사 등 각종의 공사형태에 적용 가능하게 하는 연약지반 구조용 블록을 제공하기 위한 것이다.The present invention provides a soft ground structural block using foamed pearlite or expanded vermiculite, and can be manufactured in any shape and size to be applicable to various types of construction such as load reduction measures, earth pressure reduction measures, or rapid construction and extension works. To provide a soft ground structural block.

더우기 본 발명의 블록은 환경 친화적이고 불연성이 있어 열 강하고 강도가 우수하여 쉽게 파손되지 않는 연약지반 구조용 블록이다.Furthermore, the block of the present invention is a soft ground structural block that is environmentally friendly and non-flammable, heat-resistant and excellent in strength and not easily broken.

도 1 a내지 도 1g는 본 발명에 의한 연약지반 구조용 블록의 적용 실시예를 보인 것으로,Figure 1a to 1g shows an embodiment of the application of the soft ground structure block according to the present invention,

도 1a는 옹벽의 뒷채움재Figure 1a is the backfill of the retaining wall

도 1b는 연약 지반상의 가설공사도로1b is a temporary construction road on soft ground

도 1c는 교대의 뒷채움재1C shows the backfill of the shift

도 1d는 연약지반 성토재1d is soft ground fill material

도 1e는 급경사지 성토재Figure 1e is a steep slope

도 1f는 직립옹벽 채움재Figure 1f is a standing wall filler

도 1g는 지하구조물 상부 채움재로서 적용한 것을 보인 것이다.Figure 1g is shown to be applied as a base material top fill material.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1 : 옹벽 10 : 블록1: retaining wall 10: block

본 발명은 펄나이트 또는 질석을 소정 크기로 분쇄하고, 그 분쇄된 입자들을 소정 온도로 발포하여 발포체를 제조하고, 이 제조된 발포펄나이트 1~98중량% , 발포질석 1~99중량%, 바인더 1~ 10중량%를 혼합하여 압축 성형한다.The present invention is to pulverize the pearlite or vermiculite to a predetermined size, and to form a foam by foaming the pulverized particles to a predetermined temperature, 1 to 98% by weight of the prepared foamed pearlite, 1 to 99% by weight of vermiculite, binder 1 to 10% by weight of the mixture is mixed and molded.

발포펄나이트(진주암),발포질석(버미큘나이트)는 약 760~1200℃의 고온에서 급가열시키면 함유된 휘발성분이 가스화하여 연화된 입자의 내부에서 팽창하면서 기공을 형성하게되 광석 원석부피에 비해 10~30배까지 팽창되는 것이다.When foamed pearlite (pearlite) and foamed stone (vermiculite) are rapidly heated at a high temperature of about 760-1200 ° C, the volatiles contained in them gasify and expand in the softened particles to form pores. It is expanded up to 10-30 times.

이는 광석에 포함된 2~6%정도의 수분이 기인하는 것으로 마치 팝콘을 만드는 원리와 같이 펄라이트나 질석을 팽창시키는 것으로, 팽창될 때 눈처럼 하얀 각각의 알갱이들은 아주 많은 작은 기포들로 채워지고, 그 알갱이 표면은 작은 공극들로 뒤덮여 있기 때문에 아주 큰 표면적을 갖게 된다.This is due to 2 ~ 6% moisture contained in the ore. It expands pearlite or vermiculite, just like the principle of making popcorn. When expanded, each grain of snow white is filled with many small bubbles. The grain surface is covered with small voids and therefore has a very large surface area.

발포펄나이트와 발포질석을 1중량%이하 혼합하는 경우에는 블럭의 수분흡수율이 높아 연약지반 구조용 블록으로 사용할 수 없고 , 99중량%이상 첨가하는 경우에는 수분흡수율이 낫는 장점이 있으나 강도가 약간 낫은 문제점이 있다.When the foamed pearlite and the foamed vermiculite are mixed in an amount of 1 wt% or less, the water absorption of the block is high, and thus it cannot be used as a soft ground structural block.If it is added more than 99% by weight, the water absorption is better but the strength is slightly better There is a problem.

바인더 1중량% 첨가하는 경우에는 발포입자간의 결합력이 약하고 강도가 낫은 점이 있고, 10중량%이상 첨가하는 경우에는 결합력이 강하여 압축강도가 향상된 점은 있으나 수분흡수율이 낮아 질 수 있는 문제점이 있다.In the case of adding 1% by weight of binder, the bonding strength between the foamed particles is weak and the strength is better. In the case of adding more than 10% by weight of the binder, the bonding strength is improved and the compressive strength is improved, but there is a problem that the water absorption can be lowered.

상기 바인더는 산화규소 10 ~ 90중량%, 산화 알루미늄 4~ 30중량%, 규산소오다 5 ~ 15중량%,식물성섬유질 1~10중량% 혼합하여 제조한 것을 사용한다.The binder is prepared by mixing 10 to 90% by weight of silicon oxide, 4 to 30% by weight of aluminum oxide, 5 to 15% by weight of sodium silicate, and 1 to 10% by weight of vegetable fiber.

본 발명의 연약지반 구조용 블록은, 펄나이트나 질석을 소정 크기로 분쇄하는 분쇄공정과, 분쇄된 입자를 섭씨 800∼1200 ℃로 발포하여 발포체를 제조하는 공정과, 산화규소, 산화 알루미늄, 시멘트등의 혼합물로 이루어지는 바인더를 제조하는 공정과, 상기 발포체와 상기 바인더를 소정의 비율로 혼합하는 혼합 공정과, 임의의 성형 틀에 넣고 소정의 형태로 성형하여 압축강도가 50 ~ 150Kg/cm2,수분함유율 20%이하인 연약지반 구조용 블록이 제조된다.In the soft ground structural block of the present invention, a grinding step of pulverizing pearlite or vermiculite to a predetermined size, a step of foaming the pulverized particles at 800 to 1200 degrees Celsius to produce a foam, silicon oxide, aluminum oxide, cement and the like A process for producing a binder consisting of a mixture of; and a mixing step of mixing the foam and the binder at a predetermined ratio; and molding into a predetermined shape by putting it in an arbitrary molding mold to have a compressive strength of 50 to 150 Kg / cm 2 and moisture. Soft ground structural blocks having a content of 20% or less are produced.

이하 실시예를 들어 상세히 설명한다Examples will be described below in detail.

<실시예 1><Example 1>

본 발명의 일실시예에 따른 연약지반 구조용 블록은, 펄나이트를 2㎜ 크기로분쇄하고, 그 분쇄된 입자들을 800 ℃로 급가열 팽창시킨후 발포체를 제조한다.In the soft ground structural block according to an embodiment of the present invention, the pulverized pulite is 2 mm in size, and the pulverized particles are rapidly heated and expanded at 800 ° C. to prepare a foam.

<실시예 2><Example 2>

질석을 3㎜ 크기로 분쇄하고, 그 분쇄된 입자들을 750 ℃로 급가열 팽창시킨후 발포체를 제조한다.Vermiculite is pulverized to a size of 3 mm, and the pulverized particles are rapidly thermally expanded to 750 ° C. to prepare a foam.

<실시예 3><Example 3>

산화규소 55중량%, 산화 알루미늄 30중량%, 규산소오다 10중량%,식물성섬유질 5중량% 로 혼합하여 바인더를 제조한다.A binder is prepared by mixing 55% by weight of silicon oxide, 30% by weight of aluminum oxide, 10% by weight of sodium silicate, and 5% by weight of vegetable fiber.

<실시예 4><Example 4>

발포펄나이트 45중량% , 발포질석 45중량%, 바인더 10중량%를 혼합 압축 성형하여 압축강도가 60Kg/cm2수분함유율 20% 의 연약지반 구조용 블록을 제조한다.45% by weight of foamed pearlite, 45% by weight of vermiculite, and 10% by weight of binder are mixed and molded to prepare a soft ground structural block having a compressive strength of 60 Kg / cm 2 and a water content of 20%.

<실시예 5>Example 5

발포펄나이트 10중량% , 발포질석 85중량%, 바인더 5중량%를 혼합 압축 성형하여 압축강도가 60Kg/cm2수분함유율 20% 인 연약지반 구조용 블록을 제조한다.10 wt% foamed pearlite, 85 wt% foamed vermiculite, and 5 wt% binder are mixed and molded to prepare a soft ground structural block having a compressive strength of 60 kg / cm 2 and a water content of 20%.

<실시예 6><Example 6>

발포펄나이트 55중량% , 발포질석 40중량%, 바인더 5중량%를 혼합 압축 성형하여 압축강도가 65Kg/cm2수분함유율 18% 의 연약지반 구조용 블록을 제조한다.55% by weight of foamed pearlite, 40% by weight of vermiculite, and 5% by weight of binder are mixed and molded to prepare a soft ground structural block having a compressive strength of 65 Kg / cm 2 and a water content of 18%.

<실시예 7><Example 7>

발포펄나이트 20중량% , 발포질석 73중량%, 바인더 7중량%를 혼합 압축 성형하여 압축강도가 70Kg/cm2수분함유율 15% 의 연약지반 구조용 블록을 제조한다.20% by weight of foamed pearlite, 73% by weight of vermiculite, and 7% by weight of binder are mixed and molded to prepare a soft ground structural block having a compressive strength of 70 Kg / cm 2 and a water content of 15%.

상기에서 설명한 실시예의 발포 펄나이트 또는 발포 질석을 이용한 연약지반 구조용 블록은, 스티로폼 블록과 비교해볼때, 발포광물질로 구성되어 있어 환경 친화적이고 불연성이므로 열에 강하고 강도가 우수하여 쉽게 파손되지 않을 뿐더러 화재등을 방지할 수 있고, 수분에 의한 부력 발생이 방지되고, 다양한 형태로 블록 제작이 가능하여 작업성이 향상될 수 있다. 그러므로, 하중경감 대책 및 토압저감대책 혹은 급속시공 및 증축공사 등 각종의 공사형태에서 EPS공법의 블록으로 사용할 수 있다.Soft ground structural block using expanded pulmonite or expanded vermiculite of the embodiment described above, compared to the styrofoam block is composed of foamed minerals, environmentally friendly and non-flammable, so it is resistant to heat and excellent in strength and not easily damaged, It can be prevented, buoyancy caused by moisture is prevented, and the block can be manufactured in various forms, thereby improving workability. Therefore, it can be used as the EPS construction block in various types of construction such as load reduction measures and earth pressure reduction measures or rapid construction and extension works.

도 1 a내지 도 1g는 본 발명에 의한 연약지반 구조용 블록의 적용 실시예를 보인 것이다. 먼저, 도 1a에 도시된 바와 같이, 옹벽(1)의 뒷채움재로서 본 발명의 볼록(10)을 적정크기로 절단하여 적층하여 뒤채움 시공을 할수 있다.1a to 1g shows an embodiment of the application of the soft ground structure block according to the present invention. First, as shown in Figure 1a, as the backfill material of the retaining wall (1) can be cut back to the construction by cutting the convex 10 of the present invention to a suitable size.

또한, 도 1b와 같이 연약 지반상의 가설공사도로의 하중경감을 위한 적용으로서 본 발명의 블록(10)을 연약지반 상부에 적층하고 그 위에 도로를 건설하는 시공에 적용할 수 있다.In addition, as shown in FIG. 1B, the block 10 of the present invention may be applied to a construction in which a block 10 of the present invention is laminated on the soft ground and a road is constructed thereon as an application for reducing the load on a temporary construction road on a soft ground.

이와 마찬가지로, 도 1c와 같이 교대의 뒷채움재나, 도 1d와 같이 연약지반 성토재나, 도 1e와 같이 급경사지 성토재나, 도 1f와 같이 직립옹벽 채움재나, 도 1g와 같이 지하구조물 상부 채움재등으로 적용할 수 있는 것이다.Similarly, it is applied to alternating back fill material as shown in FIG. 1C, soft ground fill material as shown in FIG. 1D, steep slope fill material as shown in FIG. 1E, or upright retaining wall fill material as shown in FIG. You can do it.

이상에서 상세히 설명한 바와 같이 본 발명은, 발포 펄나이트나 발포 질석을 바인더와 혼합하여 임의 형태로 제작되는 연약지반 구조용 블록을 제공함으로써, 하중경감 대책 및 토압저감대책 혹은 급속시공 및 증축공사 등 각종의 공사형태에서 EPS공법의 블록으로 사용할 수 있는 효과가 있다. 또한 본 발명은 종래의 스티로폼 블록에 비해 발포광물질로 구성되어 있어 환경 친화적이고 불연성이므로 열에 강하고 강도가 우수하여 쉽게 파손되지 않을 뿐더러 화재등을 방지할 수 있고, 수분에 의한 부력 발생이 방지되고, 다양한 형태로 블록 제작이 가능하여 작업성이 향상될 수 있고 강도와 변형 방지등에서도 월등한 효과가 있다.As described in detail above, the present invention provides a soft ground structural block which is manufactured in an arbitrary form by mixing expanded pulmonite or expanded vermiculite with a binder, and thus, various measures such as load reduction measures, earth pressure reduction measures, rapid construction and extension works, etc. There is an effect that can be used as a block of the EPS method in the construction form. In addition, the present invention is composed of foamed minerals compared to the conventional styrofoam block, which is environmentally friendly and non-flammable, so it is resistant to heat and excellent in strength, not easily damaged, and also prevents fires, and prevents buoyancy due to moisture. It is possible to manufacture blocks in the form, which improves workability, and has an excellent effect on strength and deformation prevention.

Claims (3)

발포펄나이트 1~98중량% , 발포질석 1~99중량%, 바인더 1~ 10중량%를 혼합하여 이루어진 것을 특징으로 연약지반 구조용 블록.1 to 98% by weight foamed pearlite, 1 to 99% by weight of vermiculite, 1 to 10% by weight of the binder, characterized in that the soft ground structure block. 제 1 항에 있어서, 바인더는 산화규소 10 ~ 90중량%, 산화 알루미늄 4~ 30중량%, 규산소오다 5 ~ 15중량%,식물성섬유질 1~10중량% 로 혼합하여 이루어지는 것을 특징으로 연약지반 구조용 블록.The method of claim 1, wherein the binder is mixed with 10 to 90% by weight of silicon oxide, 4 to 30% by weight of aluminum oxide, 5 to 15% by weight of sodium silicate, and 1 to 10% by weight of vegetable fiber. block. 제 1 항에 있어서, 상기 연약지반 구조용 블록은According to claim 1, wherein the soft ground structure block 압축강도가 50 ~ 150Kg/cm2등 수분함유율 20% 로 제조된 것을 특징으로 하는 연약지반 구조용 블록.Soft ground structural block, characterized in that the compressive strength is manufactured at 20% moisture content, such as 50 ~ 150Kg / cm 2 .
KR10-2002-0082439A 2002-12-23 2002-12-23 A structure block and it's fabrication method for reinforcing soft ground KR100523247B1 (en)

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Publication number Priority date Publication date Assignee Title
KR20210088965A (en) 2020-01-07 2021-07-15 대구대학교 산학협력단 Block to reduce earth and water pressure and to increase load bearing, and a construction method to use the block

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210088965A (en) 2020-01-07 2021-07-15 대구대학교 산학협력단 Block to reduce earth and water pressure and to increase load bearing, and a construction method to use the block
KR20220139847A (en) 2020-01-07 2022-10-17 대구대학교 산학협력단 Block to reduce earth and water pressure and to increase load bearing, and a construction method to use the block

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