PRE-MIXED COMPOSITION FOR HIGH PERFORMANCE DRY-METHOD SHOTCRETE FOR REDUCING REBOUND AND DUST GENERATION
The present invention relates to a pre-mixed composition for high-performance dry shotcrete and a construction method using the same, wherein the pre-mixed composition contains 25 to 40 wt% of cement, 8 to 15 wt% of coarse aggregate, 30 to 60 wt% of fine aggregate, 1 to 5 wt% of silica fume, 1 to 5...
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Format | Patent |
Language | English Korean |
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15.02.2022
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Abstract | The present invention relates to a pre-mixed composition for high-performance dry shotcrete and a construction method using the same, wherein the pre-mixed composition contains 25 to 40 wt% of cement, 8 to 15 wt% of coarse aggregate, 30 to 60 wt% of fine aggregate, 1 to 5 wt% of silica fume, 1 to 5 wt% of anhydrite, 1 to 5 wt% of calcium sulfoaluminate, 1 to 5 wt% of fly ash, 1 to 5 wt% of a high-performance admixture, 0.01 to 1 wt% of a plasticizer, 0.01 to 1 wt% of a thickener, 0.01 to 1 wt% of a defoamer, 0.01 to 1 wt% of a powdered AE water reducer, and 0.01 to 1 wt% of natural fibers. The high-performance admixture used in the present invention contains, with respect to 100 parts by weight of a vinyl acetate monomer, 20 to 50 parts by weight of methyl methacrylate-butyl acrylate, 1 to 10 parts by weight of polyrotaxane, 0.1 to 5 parts by weight of a ketoprofen compound represented by the following chemical formula 1, 0.1 to 5 parts by weight of alginic acid particles, and 0.1 to 5 parts by weight of zinc cyanurate. The present invention is to enhance the performance of coarse aggregate-containing dry shotcrete and achieve improvements in economic feasibility and work environment. The present invention improves basic physical properties and achieves excellent dust reduction at the same time.
본 발명은 본 발명의 일 구현 예는 시멘트 25 내지 40 중량%, 굵은골재 8 내지 15 중량%, 잔골재 30 내지 60 중량%, 실리카 흄 1 내지 5 중량%, 무수석고 1 내지 5 중량%, 칼슘 설포알루미네이트 1 내지 5 중량%, 플라이애시 1 내지 5 중량%, 고성능 혼화재 1 내지 5 중량%, 유동화제 0.01 내지 1 중량%, 증점제 0.01 내지 1 중량%, 소포제 0.01 내지 1 중량%, 분말형 AE 감수제 0.01 내지 1 중량% 및 자연섬유 0.01 내지 1 중량%를 포함하되;상기 고성능 혼화재는 비닐 아세테이트 단량체 100 중량부에 대하여, 메틸 메타크릴레이트-부틸 아크릴레이트 20 내지 50 중량부, 폴리로탁산 1 내지 10 중량부, 하기 화학식 1로 표시되는 케토프로펜 화합물 0.1 내지 5 중량부, 알긴산 입자 0.1 내지 5 중량부 및 시아누르산아연 0.1 내지 5 중량부를 포함하는 것을 사용하여;굵은골재를 함유하는 건식 숏크리트의 고성능화, 경제성 향상 및 작업환경 개선의 목적으로, 기본적인 물성을 개선하는 동시에 분진저감 효과가 뛰어난 고성능 건식 숏크리트용 프리믹스 조성물 및 이를 이용한 시공방법에 관한 것이다.[화학식 1]JPEG112021138359703-pat00007.jpg3556 |
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AbstractList | The present invention relates to a pre-mixed composition for high-performance dry shotcrete and a construction method using the same, wherein the pre-mixed composition contains 25 to 40 wt% of cement, 8 to 15 wt% of coarse aggregate, 30 to 60 wt% of fine aggregate, 1 to 5 wt% of silica fume, 1 to 5 wt% of anhydrite, 1 to 5 wt% of calcium sulfoaluminate, 1 to 5 wt% of fly ash, 1 to 5 wt% of a high-performance admixture, 0.01 to 1 wt% of a plasticizer, 0.01 to 1 wt% of a thickener, 0.01 to 1 wt% of a defoamer, 0.01 to 1 wt% of a powdered AE water reducer, and 0.01 to 1 wt% of natural fibers. The high-performance admixture used in the present invention contains, with respect to 100 parts by weight of a vinyl acetate monomer, 20 to 50 parts by weight of methyl methacrylate-butyl acrylate, 1 to 10 parts by weight of polyrotaxane, 0.1 to 5 parts by weight of a ketoprofen compound represented by the following chemical formula 1, 0.1 to 5 parts by weight of alginic acid particles, and 0.1 to 5 parts by weight of zinc cyanurate. The present invention is to enhance the performance of coarse aggregate-containing dry shotcrete and achieve improvements in economic feasibility and work environment. The present invention improves basic physical properties and achieves excellent dust reduction at the same time.
본 발명은 본 발명의 일 구현 예는 시멘트 25 내지 40 중량%, 굵은골재 8 내지 15 중량%, 잔골재 30 내지 60 중량%, 실리카 흄 1 내지 5 중량%, 무수석고 1 내지 5 중량%, 칼슘 설포알루미네이트 1 내지 5 중량%, 플라이애시 1 내지 5 중량%, 고성능 혼화재 1 내지 5 중량%, 유동화제 0.01 내지 1 중량%, 증점제 0.01 내지 1 중량%, 소포제 0.01 내지 1 중량%, 분말형 AE 감수제 0.01 내지 1 중량% 및 자연섬유 0.01 내지 1 중량%를 포함하되;상기 고성능 혼화재는 비닐 아세테이트 단량체 100 중량부에 대하여, 메틸 메타크릴레이트-부틸 아크릴레이트 20 내지 50 중량부, 폴리로탁산 1 내지 10 중량부, 하기 화학식 1로 표시되는 케토프로펜 화합물 0.1 내지 5 중량부, 알긴산 입자 0.1 내지 5 중량부 및 시아누르산아연 0.1 내지 5 중량부를 포함하는 것을 사용하여;굵은골재를 함유하는 건식 숏크리트의 고성능화, 경제성 향상 및 작업환경 개선의 목적으로, 기본적인 물성을 개선하는 동시에 분진저감 효과가 뛰어난 고성능 건식 숏크리트용 프리믹스 조성물 및 이를 이용한 시공방법에 관한 것이다.[화학식 1]JPEG112021138359703-pat00007.jpg3556 |
Author | KANG YOON SEUK MIN SUNG KI YUN KYONG KU CHO NAM WOO |
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DocumentTitleAlternate | 분진저감 효과가 뛰어난 고성능 건식 숏크리트용 프리믹스 조성물 및 이를 이용한 시공방법 |
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Snippet | The present invention relates to a pre-mixed composition for high-performance dry shotcrete and a construction method using the same, wherein the pre-mixed... |
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SubjectTerms | ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS REFRACTORIES SLAG THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF NATURAL STONE |
Title | PRE-MIXED COMPOSITION FOR HIGH PERFORMANCE DRY-METHOD SHOTCRETE FOR REDUCING REBOUND AND DUST GENERATION |
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