KR102043904B1 - Ultra early strength concrete using ultra early strength binder - Google Patents
Ultra early strength concrete using ultra early strength binder Download PDFInfo
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- KR102043904B1 KR102043904B1 KR1020170170183A KR20170170183A KR102043904B1 KR 102043904 B1 KR102043904 B1 KR 102043904B1 KR 1020170170183 A KR1020170170183 A KR 1020170170183A KR 20170170183 A KR20170170183 A KR 20170170183A KR 102043904 B1 KR102043904 B1 KR 102043904B1
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- 239000011230 binding agent Substances 0.000 title claims abstract description 91
- 239000004567 concrete Substances 0.000 title claims abstract description 44
- 239000000203 mixture Substances 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 18
- 239000004568 cement Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011575 calcium Substances 0.000 claims abstract description 7
- -1 Calcium Sulfo Aluminate Chemical class 0.000 claims abstract description 6
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 6
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 6
- 239000010440 gypsum Substances 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 5
- 239000002270 dispersing agent Substances 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 description 24
- 239000003795 chemical substances by application Substances 0.000 description 12
- 239000000701 coagulant Substances 0.000 description 10
- 230000015271 coagulation Effects 0.000 description 10
- 238000005345 coagulation Methods 0.000 description 10
- 229910001341 Crude steel Inorganic materials 0.000 description 7
- 239000011734 sodium Substances 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 6
- 238000009415 formwork Methods 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000176 sodium gluconate Substances 0.000 description 2
- 229940005574 sodium gluconate Drugs 0.000 description 2
- 235000012207 sodium gluconate Nutrition 0.000 description 2
- PQMFVUNERGGBPG-UHFFFAOYSA-N (6-bromopyridin-2-yl)hydrazine Chemical compound NNC1=CC=CC(Br)=N1 PQMFVUNERGGBPG-UHFFFAOYSA-N 0.000 description 1
- DEXFNLNNUZKHNO-UHFFFAOYSA-N 6-[3-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-3-oxopropyl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)C(CCC1=CC2=C(NC(O2)=O)C=C1)=O DEXFNLNNUZKHNO-UHFFFAOYSA-N 0.000 description 1
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 206010003549 asthenia Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 229940044172 calcium formate Drugs 0.000 description 1
- 235000019255 calcium formate Nutrition 0.000 description 1
- 239000004281 calcium formate Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate 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
- C04B7/00—Hydraulic cements
- C04B7/32—Aluminous cements
- C04B7/323—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/20—Retarders
- C04B2103/22—Set retarders
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/40—Surface-active agents, dispersants
- C04B2103/408—Dispersants
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/05—Materials having an early high strength, e.g. allowing fast demoulding or formless casting
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
본 발명은 12시간 내에 측면 거푸집 탈형 소요강도인 5MPa를 확보할 수 있는 초조강 결합재 및 이를 이용한 초조강 콘크리트 조성물에 관한 것이다.
본 발명은 CSA(Calcium Sulfo Aluminate) 및 석고가 혼합된 분체 조성물로서, 함유된 CaO와 SO3의 중량비가 1:1.9~2.3이고, 함유된 Al2O3와 SO3의 중량비가 1:0.8~1.1인 것을 특징으로 하는 초조강 결합재」를 제공한다.
또한, 본 발명은 「결합재, 잔골재, 굵은골재 및 물의 배합으로 조성되는 콘크리트 조성물로서, 단위 결합재량 330~340kg/㎥, 단위 수량 170~200kg/㎥이고, 상기 결합재는 시멘트 82~85wt% 및 제1항의 초조강 결합재 15~18wt%로 조성되고, 양생온도 12~13℃의 간절기 조건에서 재령 28일 압축강도 24~40MPa 및 슬럼프 150mm 이상이 충족되면서, 재령 12시간 압축강도가 5MPa을 초과하는 것을 특징으로 하는 초조강 콘크리트 조성물」을 함께 제공한다.The present invention relates to a first steel binder and a second steel concrete composition using the same that can secure 5MPa of the side form die-deformation required strength within 12 hours.
The present invention relates to a powder composition in which CSA (Calcium Sulfo Aluminate) and gypsum are mixed, wherein a weight ratio of CaO and SO 3 is 1: 1.9 to 2.3, and a weight ratio of Al 2 O 3 and SO 3 is 1: 0.8 to It is provided with an ultra-strength steel binder, characterized in that 1.1.
In addition, the present invention is "concrete composition formed by the combination of binder, fine aggregate, coarse aggregate and water, unit binder amount of 330 ~ 340kg / ㎥, unit quantity 170 ~ 200kg / ㎥, the binder is 82 ~ 85wt% cement and It is composed of 15 ~ 18wt% of the first steel binder of claim 1, and meets the 28-day compressive strength of 24 ~ 40MPa and the slump of 150mm or more under the intermittent conditions of curing temperature 12 ~ 13 ℃, the compressive strength of 12 hours of age exceeding 5MPa Ultra-tough steel concrete composition characterized by the above.
Description
본 발명은 12시간 내에 측면 거푸집 탈형 소요강도인 5MPa를 확보할 수 있는 초조강 결합재를 이용한 초조강 콘크리트 조성물에 관한 것이다.The present invention relates to a roughened steel concrete composition using a roughened steel binder capable of securing 5MPa, which is the required strength of the side formwork demolding within 12 hours.
현재 공동주책의 1층당 공사 사이클은 6～7일가량 소요되는 것이 일반적이며 시공사들은 공기단축을 위하여 공사 사이클을 단축하기 위한 다양한 시도를 진행하고 있다. 이러한 다양한 시도 중 가장 많이 연구되고 있는 분야는 거푸집 조기 탈형을 위해 조강 시멘트, 조강 첨가제 등을 사용한 조강 콘크리트 분야이다. 측면 거푸집 탈형 시 기준이 되는 소요 강도는 5MPa 이상으로 관리되고 있으며, 슬래브 거푸집의 탈형 강도는 12MPa로 관리 되고 있다. 이러한 소요강도를 조기에 만족한다면 탈형 시기가 앞당겨져 2~4day/cycle(당일 오후 타설 후 다음날 오전 거푸집 탈형)이 가능하게 되어 공사기간을 획기적으로 줄일 수 있게 된다. 따라서, 거푸집 조기 탈형을 통한 공기 단축을 위해서는 우선 콘크리트 타설 후 12시간 이내에 5MPa을 달성하는 것이 목표가 된다.Currently, the construction cycle per floor of the joint order takes about 6 ~ 7 days, and the builders are making various attempts to shorten the construction cycle to shorten the air. The most studied field among these various attempts is the crude steel concrete using crude steel cement, crude steel additives, etc. for early demolding of formwork. When demolding the side formwork, the required strength, which is the standard, is managed at 5 MPa or more, and the demolding strength of the slab formwork is managed at 12 MPa. If the required strength is satisfied early, the demolding time is advanced and 2 ~ 4day / cycle (formal demoulding the next morning after the afternoon pouring) can be drastically shortened the construction period. Therefore, in order to shorten the air by early demoulding, the goal is to achieve 5 MPa within 12 hours after concrete casting.
본 발명은, OPC의 수화반응 과정 중에 C3S 수화 유도기 단계에서의 수화반응 촉진을 위한 초조강 결합재 및 콘크리트에 조강 성능을 내어 응결(초결(유동성 상실 단계) 시간, 종결(경화시작 단계)) 시간 및 경화 시간을 단축시켜, 12시간 내에 측면 거푸집 탈형 소요강도인 5MPa이 확보되는 초조강 콘크리트 조성물을 제공함에 그 목적이 있다.The present invention, during the hydration reaction of OPC to give the crude steel performance to the crude steel binder and concrete for promoting the hydration reaction in the C 3 S hydration induction phase step (coagulation (loss of fluidity) time, termination (hardening start phase)) It is an object of the present invention to reduce the time and curing time, to provide a super-tough steel concrete composition that secures 5MPa, which is the required strength of the side formwork within 12 hours.
전술한 과제 해결을 위해, 본 발명은 「CSA(Calcium Sulfo Aluminate) 및 석고가 혼합된 분체 조성물로서, 함유된 CaO와 SO3의 중량비가 1:1.9~2.3이고, 함유된 Al2O3와 SO3의 중량비가 1:0.8~1.1인 것을 특징으로 하는 초조강 결합재」를 제공한다.In order to solve the above problems, the present invention is a powder composition of Calcium Sulfo Aluminate (CSA) and gypsum, the weight ratio of CaO and SO 3 contained is 1: 1.9 ~ 2.3, Al 2 O 3 and SO contained 3 is a super-strength steel binder characterized in that the weight ratio of 1: 0.8 to 1.1.
또한, 본 발명은 「결합재, 잔골재, 굵은골재 및 물의 배합으로 조성되는 콘크리트 조성물로서, 단위 결합재량 330~340kg/㎥, 단위 수량 170~200kg/㎥이고, 상기 결합재는 시멘트 82~85wt% 및 제1항의 초조강 결합재 15~18wt%로 조성되고, 재령 28일 압축강도 24MPa 이상 및 슬럼프 150mm 이상의 조건을 충족되면서, 재령 12시간 압축강도가 5MPa을 초과하는 것을 특징으로 하는 초조강 콘크리트 조성물」을 함께 제공한다.In addition, the present invention is "concrete composition formed by the combination of binder, fine aggregate, coarse aggregate and water, unit binder amount of 330 ~ 340kg / ㎥, unit quantity 170 ~ 200kg / ㎥, the binder is 82 ~ 85wt% cement and It is composed of 15 ~ 18wt% of the superelastic steel binder of claim 1, and meets the conditions of the compressive strength of 24MPa or more and the slump of 150mm or more 28 days, the super-strength steel concrete composition characterized in that the compressive strength exceeds 5MPa for 12 hours to provide.
또한, 본 발명은 「응결지연제가 결합재 대비 0.2~0.25wt% 첨가되고, NS(Na2SO4)가 결합재 대비 1~3wt% 첨가되어, 가사시간 2시간 이상이 확보되는 것을 특징으로 하는 초조강 콘크리트 조성물」을 함께 제공하고,In addition, the present invention "coagulation delay agent is added 0.2 ~ 0.25 wt% compared to the binder, NS (Na 2 SO 4 ) is added to 1-3wt% compared to the binder, the super-tension steel, characterized in that the pot life is more than 2 hours Concrete composition "together,
「응결지연제가 결합재 대비 0.1~0.15wt% 첨가되고, 분산제가 결합재 대비 0.15~0.20wt% 첨가되고, 유지제가 결합재 대비 0.5~0.7wt% 첨가되어, 가사시간 2시간이 확보되는 것을 특징으로 하는 초조강 콘크리트 조성물」을 함께 제공한다.`` A coagulation delay agent is added 0.1 ~ 0.15wt% relative to the binder, dispersant is added 0.15 ~ 0.20wt% relative to the binder, 0.5 ~ 0.7wt% added to the binder, so that the pot life is secured 2 hours Steel concrete composition ”.
본 발명이 제공하는 초조강 결합재는 시멘트와 함께 결합재로 적용하여 콘크리트 조성물의 경화 속도를 크게 향상시킬 수 있다.The super-strength steel binder provided by the present invention can be applied as a binder together with cement to greatly improve the curing rate of the concrete composition.
또한, 본 발명은 상기 초조강 결합재의 적정 사용량과 혼화제의 종류 및 사용량을 제시하며, 이에 콘크리트 조성물의 재령 12시간 압축강도 5MPa 이상 및 가사시간 2시간 이상의 물성을 확보할 수 있다.In addition, the present invention proposes an appropriate amount of use of the cemented steel binder and the type and amount of admixtures, which can ensure the physical properties of the concrete composition 12 hours compressive strength 5MPa or more and pot life 2 hours or more.
본 발명은 「CSA(Calcium Sulfo Aluminate) 및 석고가 혼합된 분체 조성물로서, 함유된 CaO와 SO3의 중량비가 1:1.9~2.3이고, 함유된 Al2O3와 SO3의 중량비가 1:0.8~1.1인 것을 특징으로 하는 초조강 결합재」를 제공한다. The present invention relates to a powder composition in which CSA (Calcium Sulfo Aluminate) and gypsum are mixed, in which a weight ratio of CaO and SO 3 is 1: 1.9 to 2.3, and a weight ratio of Al 2 O 3 and SO 3 is 1: 0.8. It is to provide a super-strength steel bonding material characterized in that ~ ~ 1.1.
아래 [참고도 1]은 기존의 1종 보통 포틀랜드 시멘트(OPC)를 결합재로 적용한 콘크리트 타설 후 단위 결합재량 및 양생온도에 따른 재령별 압축강도 발현 경과를 나타낸 것이다. 실험체는 설계강도 재령 28일 24MPa, 슬럼프 150mm, 굵은골재 최대 치수 25mm 조건에서 배합하였으며, 단위 결합재량은 300~345kg/㎥으로 변화를 주었고, 단위 수량은 150kg/㎥, 단위 잔골재량은 264kg/㎥, 단위 굵은골재량은 616kg/㎥로 특정하였다.[Ref. 1] below shows the development of compressive strength by age according to the unit binder content and curing temperature after concrete placement using the conventional type 1 ordinary portland cement (OPC) as a binder. The test specimens were formulated under conditions of 24MPa, slump 150mm, coarse aggregate 25mm in design strength age, unit binder mass was changed to 300 ~ 345kg / ㎥, unit quantity was 150kg / ㎥, unit aggregate aggregate was 264kg / ㎥. , The unit coarse aggregate amount was specified as 616kg / ㎥.
[참고도 1][Reference Figure 1]
전체적으로 재령 12시간만에 압축강도 5MPa에 도달한 경우는 없었으며, 단위 결합재량 330kg/㎥의 경우를 볼 때, 양생온도 20℃ 조건에서는 24.5시간, 양생온도 10℃ 조건에서는 36.8시간 경과 후 압축강도 5MPa에 도달하였다.Overall, the compressive strength of 5 MPa was not reached within 12 hours of age, and in the case of unit binder mass of 330kg / ㎥, the compressive strength after 24.5 hours at curing temperature 20 ℃ and 36.8 hours at curing temperature 10 ℃ 5 MPa was reached.
아래 [참고도 1-1]은 3종 조강 시멘트를 결합재로 적용한 콘크리트 타설 후, 양생온도 13℃ 조건에서 단위 결합재량 변화에 따른 재령별 압축강도 발현 경과를 나타낸 것이다. 실험체는 설계강도 재령 28일 24MPa, 슬럼프 150mm, 굵은골재 최대 치수 25mm 조건에서 배합하였으며, 단위 수량은 150kg/㎥, 단위 잔골재량 264kg/㎥, 단위 굵은골재량 616kg/㎥로 특정하였다. [Refer to Figure 1-1] shows the progress of the compressive strength by age according to the change in the amount of unit binder in the curing temperature 13 ℃ condition after the concrete is applied three kinds of crude steel cement as a binder. The test specimens were formulated under conditions of 24MPa, slump 150mm, coarse aggregate 25mm for design strength age, unit quantity of 150kg / ㎥, unit aggregate aggregate 264kg / ㎥, unit aggregate aggregate 616kg / ㎥.
[참고도 1-1][Reference Figure 1-1]
단위 결합재량이 330~530kg/㎥인 모든 경우에 재령 12시간의 압축강도는 1~1.5MPa로 나타났고, 단위 결합재량에 따라 14~18시간 경과 후에야 콘크리트 압축강도가 5MPa에 도달하였다.In all cases where the unit binder content was 330 ~ 530kg / ㎥, the compressive strength of 12 hours was 1 ~ 1.5MPa, and the concrete compressive strength reached 5MPa after 14 ~ 18 hours depending on the unit binder content.
이에 본 발명에서는 시멘트에 첨가되어 콘크리트의 조강성능을 발현시키는 초조강 결합재를 구현하기 위해 콘크리트의 속경성에 영향을 미치는 수화 생성물인 에트린자이트(Ettringite, 6CaO·Al2O3·3SO3·32H2O) 생성에 필요한 CaO, SO3 및 Al2O3의 화학량론적 최적 조성 비율을 검토하였다.Therefore, in the present invention, to form a super-tough steel binder that is added to cement to express the roughness performance of concrete, Ettringite (6CaOAl 2 O 3 · 3SO 3 The stoichiometric optimal composition ratios of CaO, SO 3 and Al 2 O 3 required for 32H 2 O) production were examined.
에트린자이트 1g 생성 시 필요한 성분의 양은 다음과 같다.The amount of ingredients required to produce 1 g of ethrinzite is as follows.
(1) 4CaO·3Al2O3·SO3 = 0.486g(1) 4CaO 3 Al 2 O 3 SO 3 = 0.486 g
(2) 2(CaO·SO3) = 0.217g(2) 2 (CaOSO 3 ) = 0.217 g
(3) 38H2O = 0.545g(3) 38H 2 O = 0.545 g
따라서, CaO, SO3 및 Al2O3의 화학량론적 최적 조성 비율은 다음과 같다.Therefore, the stoichiometric optimal composition ratios of CaO, SO 3 and Al 2 O 3 are as follows.
(1) CaO/SO3비 = 1.9 (1) CaO / SO 3 ratio = 1.9
(2) Al2O3/SO3비 = 0.8(2) Al 2 O 3 / SO 3 ratio = 0.8
(3) Water/4CaO·3Al2O3·SO3+2(CaO·SO3) = 0.78(3) Water / 4CaO 3 Al 2 O 3 SO 3 +2 (CaOSO 3 ) = 0.78
CSA(Calcium Sulfo Aluminate) 및 석고를 혼합하여 CaO/SO3비 1.9 및 Al2O3/SO3비 0.8인 초조강 결합재를 제조할 수 있으며, 이러한 초조강 결합재는 시멘트(OPC, 3종 조강 시멘트)와 혼합하여 사용할 수 있는데, 거푸집 탈형 시간에 맞게 목표 강도를 발현하는 시멘트와의 적정 사용 비율을 파악하기 위해 상기 초조강 결합재의 사용량을 변화시켜 가면서, 콘크리트의 응결시간 및 재령 시간별 압축강도를 실험하였다.Calcium Sulfo Aluminate (CSA) and gypsum can be mixed to produce a roughened steel binder with a CaO / SO 3 ratio of 1.9 and an Al 2 O 3 / SO 3 ratio of 0.8, which is made of cement (OPC, three types of crude steel cement). ) Can be used in combination with the cement, demonstrating the proper use ratio of cement to express the target strength according to the mold demolding time, by varying the amount of the cemented steel binder used, and experiments the concrete's condensation time and age-specific compressive strength It was.
아래 [참고도 2]에서의 실험 조건은 결합재 450g, ISO 모래 1350g, 물-결합재비 50%의 조건을 동일하게 적용하였으며, 양생온도 12~13℃, 감수제(AD) 사용량 결합재량 대비 3.0wt%의 배합 조건에서, 전체 결합재 중 상기 초조강 결합재의 함량을 7wt%, 15wt%, 21wt%로 변화시켜 가면서 배합한 콘크리트 조성물의 응결시간 및 재령 시간별 압축강도를 시험한 결과를 정리한 그래프이다. [참고도 2] 그래프의 하단 X축은 상기 초조강 결합재의 CaO/SO3비(C/S비)를 나타낸 것이다 The experimental conditions in the following [Reference Figure 2] was applied to the same conditions of the binder 450g, ISO sand 1350g, water-bonding material ratio 50%, curing temperature 12 ~ 13 ℃, 3.0wt% compared to the amount of binder (AD) consumption It is a graph summarizing the test results of the condensation time and compressive strength of the concrete composition blended while varying the content of the first steel binder in the total binder to 7wt%, 15wt%, 21wt% of the total binder. [Reference Figure 2] The lower X axis of the graph shows the CaO / SO 3 ratio (C / S ratio) of the ultra-tough steel binder.
[참고도 2][Reference Figure 2]
전체 결합재 중 상기 초조강 결합재가 7wt% 포함된 경우에는 가사시간이 2시간 이상 확보되나 재령 시간별 압축강도 향상 효과를 거의 누리지 못하는 결과를 확인할 수 있다.When 7wt% of the superelastic steel binder is included in the total binder, the pot life is secured for 2 hours or more, but it can be confirmed that the result of almost no improvement in compressive strength by age is achieved.
전체 결합재 중 상기 초조강 결합재가 15wt% 포함된 경우에는 가사시간이 1시간 이상 확보되며, 콘크리트 조성물의 재령 시간별 압축강도 향상 효과도 나타남을 확인할 수 있다.In the case where 15 wt% of the first steel binder is included in the total binder, the pot life is secured for 1 hour or more, and it can be confirmed that the compressive strength improvement effect is also shown for each age of the concrete composition.
전체 결합재 중 상기 초조강 결합재가 21wt% 포함된 경우에는 재령 시간별 압축강도가 크게 향상되어, 재령 12시간 5MPa의 목표를 크게 상회하나, 1시간 이내로 급결되므로 콘크리트 조성물의 충전성 및 작업시간 확보에 어려움이 있을 것으로 보인다.In the case of total binder included 21wt% of the superelevity steel binder material, the compressive strength for each age is greatly improved, greatly exceeding the target of 5MPa for 12 hours of age, but it is difficult to secure the filling and working time of the concrete composition because it is fastened within 1 hour. This seems to be.
따라서, 본 발명에서는 전체 결합재 중 상기 초조강 결합재가 15wt% 수준 포함된 경우에 기초하여, 15±2~3wt% 범위 내 사용 조건에서의 콘크리트 응결시간과 재령 시간별 압축강도를 실험하였다. 이하의 모든 실험은 양생온도 12~13℃의 간절기 조건에서 실시하였다.Therefore, in the present invention, the concrete settling time and the compressive strength of the concrete age under the use conditions within the range of 15 ± 2 ~ 3wt% based on the case where the super-strength steel binder contained 15wt% level of the total binder. All the experiments below were carried out under season conditions of curing temperature 12 ~ 13 ℃.
한편, 상기 초조강 결합재의 CaO, SO3 및 Al2O3에 대한 화학량론적 최적 조성 비율 검토 결과 최적 Water/4CaO·3Al2O3·SO3+2(CaO·SO3)비가 0.78인 것은 최적 물-결합재비가 78%라는 의미이고, 초기 수화반응이 활발하여 통상의 시멘트에 비해 초기의 물 소비량이 많음을 의미한다. 따라서 시멘트에 상기 초조강 결합재가 혼합된 결합재의 물-결합재비는 통상의 수준보다 높게 설정하는 것이 바람직하다.On the other hand, as a result of examination of the stoichiometric optimal composition ratio of CaO, SO 3 and Al 2 O 3 of the super-strength steel binder material, it is optimal that the ratio of Water / 4CaO · 3Al 2 O 3 · SO 3 +2 (CaO · SO 3 ) is 0.78 The water-binding ratio is 78%, and the initial hydration reaction is active, which means that the initial water consumption is higher than that of the ordinary cement. Therefore, it is preferable to set the water-binder ratio of the binder in which the cemented steel binder is mixed in cement is higher than a normal level.
따라서 콘크리트 설계강도 재령 28일 24MPa, 슬럼프 150mm, 굵은골재 최대 치수 25mm 조건에서, 단위 결합재량이 300~340kg/㎥ 범위일 때, 통상적으로 물-결합재비를 50% 수준으로 적용하여 적정 단위 수량은 150~170kg/㎥이 되지만, 본 발명은 재령 초기에 수화반응이 활발히 일어나는 초조강 결합재가 적용되므로, 단위수량은 170~200kg/㎥ 범위로 적용함이 바람직하다.Therefore, under the conditions of concrete design strength 28 days 24MPa, slump 150mm, coarse aggregate maximum size 25mm, when the amount of unit binder is in the range of 300 ~ 340kg / ㎥, water-binder ratio is usually applied at 50% level, 150 ~ 170kg / ㎥ will be, but the present invention is applied to the steel sheet to which the hydration reaction is actively active in the early stages of age, it is preferable to apply the unit amount in the range of 170 ~ 200kg / ㎥.
아래 [표 1]은 위와 같은 시험 결과를 정리한 것인데, 본 발명에서 목표로 하는 조강성능은 "콘크리트 타설 후 재령 12시간 압축강도 5MPa 이상 발현"이지만, 콘크리트 원료와 배합상의 여러 조건에 따라 압축강도 발현 성상에 오차가 발생할 수 있으므로, 재령 10시간 압축강도가 5Ma 이상 발현되는 결과를 기준으로 OPC와 USB의 혼합비율을 검토하였다. 각 시험예에서 AD제를 결합재 대비 3.0wt% 첨가하였다. 단위 결합재량은 330kg/㎥으로 특정하였고, 단위 수량은 상기 초조강 결합재에 의한 초기 물 소요량을 고려하여 175g/㎥으로 특정하였다.[Table 1] below summarizes the test results as described above, but the target steelmaking performance is "expressed over 12 hours of compressive strength 5MPa after concrete casting", but the compressive strength according to various conditions of concrete raw materials and mixing Since the error may occur in the expression properties, the mixing ratio of OPC and USB was examined based on the result that the compressive strength over 10 hours is expressed at 5 Ma. In each test example, 3.0 wt% of the AD agent was added. The amount of unit binder was specified as 330 kg / m 3, and the number of units was specified as 175 g / m 3 in consideration of the initial water requirement by the steel sheet.
- OPC : 1종보통포틀랜드시멘트-OPC: Type 1 Ordinary Portland Cement
- USB : 본 발명의 초조강 결합재(이하 동일)-USB: Ultra-strength steel bonding material of the present invention
위 [표 1]을 통해 시험예 1-3 내지 시험예 1-6에서 1시간 이상의 가사시간이 확보됨과 동시에 재령 10시간 콘크리트 압축강도가 5MPa 이상으로 발현됨을 확인할 수 있다. 따라서, 전체 결합재 중 OPC와 USB의 유효 함량은 잠정적으로 OPC 82~85wt%, USB 15~18wt%로 결론 내릴 수 있다.Through Table 1 above it can be confirmed that the pot life time of more than 1 hour in Test Example 1-3 to Test Example 1-6 and at the same time express the concrete compressive strength of more than 5MPa 10 hours. Therefore, it can be concluded that the effective contents of OPC and USB in the total binder are OPC 82 ~ 85wt%, USB 15 ~ 18wt%.
한편, 상기 USB(Ultra early strength binder)의 유효 CaO/SO3비 및 Al2O3/SO3비를 파악하기 위해 화학량론적 최적 조성(CaO/SO3비 = 1.9, Al2O3/SO3비 = 0.8)을 기준으로 CaO/SO3 및 Al2O3/SO3에 변화를 주면서 콘크리트 응결시간과 재령 시간별 압축강도를 실험하였다. 각 시험예에서 AD제를 결합재 대비 3.0wt% 첨가하였다.On the other hand, the stoichiometric optimal composition (CaO / SO 3 ratio = 1.9, Al 2 O 3 / SO 3 to determine the effective CaO / SO 3 ratio and Al 2 O 3 / SO 3 ratio of the ultra early strength binder (USB) The ratio of concrete settling time and compressive strength for each age were tested with varying CaO / SO 3 and Al 2 O 3 / SO 3 based on the ratio = 0.8). In each test example, 3.0 wt% of the AD agent was added.
위 실험결과 화학량론적 최적 조성 상태인 시험예2-5(CaO/SO3 1.9, Al2O3/SO3 0.8)에서 조강성이 극대화됨을 확인할 수 있고, 시험예2-3,4,6에서도 재령 10시간 압축강도 5MPa 이상이 발현되는 것을 확인할 수 있다. 또한, 응결시간도 시험예2-3 내지 시험예2-6에서 1시간 이상으로 나타나 CaO와 SO3의 중량비는 1:1.8~2.3, Al2O3와 SO3의 중량비는 1:0.7~1.1인 것이 적정 범위로 파악된다.As a result of the above experiment, it can be seen that the roughness is maximized in Test Example 2-5 (CaO / SO 3 1.9, Al 2 O 3 / SO 3 0.8), which is the stoichiometric optimal composition state, and in Test Examples 2-3, 4, and 6 It can be confirmed that the compressive strength of 5 MPa or more is expressed for 10 hours. In addition, the setting time was also 1 hour or more in Test Example 2-3 to Test Example 2-6, and the weight ratio of CaO and SO 3 was 1: 1.8 to 2.3, and the weight ratio of Al 2 O 3 and SO 3 was 1: 0.7 to 1.1. It is grasped to be in an appropriate range.
정리하면, 결합재, 잔골재, 굵은골재 및 물의 배합으로 조성되는 콘크리트 조성물이 단위 결합재량 330~340kg/㎥, 단위 수량 170~200kg/㎥ 조건에서, 상기 결합재를 시멘트(OPC 또는 3종 조강 시멘트) 82~85wt% 및 상기 초조강 결합재(CaO와 SO3의 중량비는 1:1.8~2.3, Al2O3와 SO3의 중량비는 1:0.7~1.1) 15~18wt%로 조성함에 따라 재령 28일 압축강도 24~40MPa 및 슬럼프 150mm 이상의 조건이 충족되면서, 재령 12시간 압축강도가 5MPa을 초과하는 초조강 콘크리트 조성물이 도출된다.In summary, the concrete composition is formed by the combination of the binder, fine aggregate, coarse aggregate and water in the unit binder amount of 330 ~ 340kg / ㎥, unit quantity 170 ~ 200kg / ㎥ conditions, the binder is cement (OPC or three kinds of crude cement) 82 ~ 85wt% and the ultra-steel composite (weight ratio of CaO and SO 3 is 1: 1.8 ~ 2.3, Al 2 O 3 and SO 3 weight ratio is 1: 0.7 ~ 1.1) 15 ~ 18wt% according to the composition of the 28-day compression With conditions of strength 24-40 MPa and slump 150 mm or more being met, a roughened steel concrete composition with a compressive strength of 12 hours over 5 MPa is derived.
다만, 콘크리트 조성물의 가사시간은 2시간 이상 확보되어야 충분한 작업시간을 확보할 수 있으므로, 응결지연제로서 CA(Citirc aicd), SG(Sodium Gluconate), BA(Boric Acid), TA(Tartarnic Acid), PA(Phosphoric Acid), D-300(TA계 합성)을 각각 결합재 대비 0.3wt% 첨가하여 전체적으로 가사 시간 확보에 효과가 있는 것을 확인하였으나 콘크리트 조성물의 재령 초기 강도가 감소하는 경향을 보였다.However, the pot life of the concrete composition should be secured more than 2 hours to ensure sufficient working time, as a delayed coagulant CA (Citirc aicd), SG (Sodium Gluconate), BA (Boric Acid), TA (Tartarnic Acid), It was confirmed that PA (Phosphoric Acid) and D-300 (TA-based synthesis) were added 0.3wt% compared to the binder, respectively, to improve pot life, but the initial strength of concrete composition tended to decrease.
아래 [표 3]은 상기 시험예2-3 내지 시험예2-6 중 응결시간 및 재령 초기 압축강도 면에서 가장 열악한 물성이 발현되는 시험예2-3을 기준으로 응결지연제 첨가량에 따른 물성 변화 시험결과(시험예2-3-1 내지 시험예2-3-6)를 정리한 것이다.Table 3 below shows the change of physical properties according to the addition amount of the coagulant retardant based on Test Example 2-3, in which the poorest physical properties are expressed in terms of the setting time and the initial compressive strength of the Test Examples 2-3. The test results (Test Example 2-3-1 to Test Example 2-3-6) are summarized.
아래 [표 3]의 시험예2-3-1 내지 시험예2-3-6은 응결지연제 첨가량만 달리 하였을 뿐 나머지 배합은 상기 시험예2-3과 동일하다. 응결지연제로는 CA(Citirc aicd)를 적용하였다.Test Example 2-3-1 to Test Example 2-3-6 of Table 3 below, only the amount of coagulation delay added was different, the remaining formulations were the same as in Test Example 2-3. CA (Citirc aicd) was applied as a coagulation delay agent.
위 [표 3]을 통해 응결지연제(CA)를 결합재 대비 0.2wt 이상 사용할 때에는 재령 10시간 압축강도가 5MPa 이하로 떨어짐을 확인할 수 있었고, 응결지연제(CA)를 결합재 대비 0.05wt% 적용한 경우에는 응결시간 지연의 효과가 미미함을 알 수 있었다. When using the coagulant retardant (CA) 0.2wt or more compared to the binder through [Table 3] it was confirmed that the compressive strength falls below 5MPa for 10 hours, and when the coagulant delayer (CA) is applied 0.05wt% It was found that the effect of delaying the setting time was insignificant.
따라서, 응결지연제와 경화촉진제를 혼합 사용하는 방안, 응결지연제와 콘크리트의 유동성 유지 효과가 있는 유지제 및 콘크리트 유동성 증진 효과가 있는 분산제를 혼합 사용하는 방안 등을 검토하였다.Therefore, the method of mixing the coagulation retardant and the curing accelerator, the method of using the coagulant retardant and the dispersant with the concrete fluidity enhancing effect, and the like have been examined.
아래의 [표 4]는 위에서 응결지연제로 검토된 CA와 여러 가지 경화촉진제를 혼합 사용한 경우의 콘크리트 성능 평가 결과를 정리한 것이다.[Table 4] below summarizes the concrete performance evaluation results when a mixture of CA and various curing accelerators examined as a coagulation delay agent was used.
경화촉진제로 검토된 것은 초기 초조강 결합재 수화물 생성량 촉진 및 증가를 위해 설페이트계, 카르복실계, 카보네이트계 중 가장 효과적인 NS(Na2SO4), CF(Calcium formate(Ca(HCOO)2)) 및 LC( Li2CO3)를 선정하였다.Considered as curing accelerators, NS (Na 2 SO 4 ), CF (Calcium formate (Ca (HCOO) 2 )), which is the most effective among sulfate, carboxyl, and carbonates, to promote and increase the initial strength of super-steel binder hydrate, and LC (Li 2 CO 3 ) was selected.
위의 [표 4]에서는 응결지연제를 결합재 대비 0.2wt% 첨가하고, 경화촉진제 중 NS(Na2SO4)를 결합재 대비 1~3wt% 첨가한 경우 2시간의 가사시간이 확보되면서 응결지연제를 단독 사용한 경우에 비해 압축강도가 보상되어 재령 10시간 압축강도 5MPa 이상의 물성이 확보됨이 확인된다.In the above [Table 4], when the coagulant retardant is added 0.2wt% compared to the binder and NS (Na 2 SO 4 ) is added to the binder 1 ~ 3wt% compared to the binder, the coagulation delay is secured by securing 2 hours of pot life. Compressive strength is compensated compared to the case of using alone, it is confirmed that the physical properties of 5MPa or more 10-hour compressive strength.
아래 [표 5]는 상기 NS(Na2SO4)를 결합재 대비 1wt% 첨가하고, 응결지연제의 첨가량을 결합재 대비 0.1~0.3wt% 범위에서0.05wt%씩 변화를 주면서 실험한 콘크리트 성능 평가 결과를 정리한 것이다.Table 5 below shows the results of concrete performance evaluation while adding 1 wt% of NS (Na 2 SO 4 ) to the binder and varying the amount of the coagulant delaying agent by 0.1 wt% in the range of 0.1 to 0.3 wt% of the binder. It is summarized.
위 [표 5]를 통해 상기 NS(Na2SO4)를 결합재 대비 1wt% 첨가한 경우에는 응결지연제를 결합재 대비 0.15~0.25wt% 첨가하였을 때 2시간 이상의 가사시간 및 재령 10시간 압축강도 5MPa 이상의 물성이 확보됨이 확인된다. 다만, NS(Na2SO4)의 첨가량을 늘리면 가사시간이 단축되고, 초기 재령 압축강도는 증진되는 경향을 감안하여, 상기 응결지연제를 결합재 대비 0.2~0.25wt% 첨가하고, 상기 NS(Na2SO4)를 결합재 대비 1~3wt% 첨가할 때 2시간 이상의 가사시간 및 재령 10시간 압축강도 5MPa 이상의 물성이 확보될 것으로 판단된다.In the case of adding 1 wt% of the NS (Na 2 SO 4 ) compared to the binder through [Table 5] when 0.15 ~ 0.25 wt% of the coagulant delaying agent is added compared to the binder 2 hours pot life and age 10 hours compressive strength 5MPa It is confirmed that the above physical properties are secured. However, increasing the addition amount of NS (Na 2 SO 4 ) is shortened the pot life, the initial age compressive strength in consideration of the tendency to increase, 0.2 ~ 0.25 wt% of the coagulation delay agent is added to the binder, the NS (Na 2 SO 4 ) 1 ~ 3wt% compared to the binder is expected to secure more than 2 hours of pot life and age 10 hours compressive strength of 5MPa or more.
또한, 상기 응결지연제와 함께 유지제 및 분산제를 혼합 사용하는 방안을 검토하면서 상기 응결지연제 사용량을 결합재 대비 0.1~0.15wt% 범위로 줄임으로서 콘크리트 조성물의 재령 초기 압축강도 손실을 저감하고, 분산제와 유지제가 각각 결합재 대비 0.15~0.20wt%, 0.5~0.7wt% 첨가됨으로써, 2시간 이상의 가사시간이 확보됨을 확인할 수 있었다.In addition, while reducing the amount of the coagulant delayed to 0.1 ~ 0.15wt% compared to the binder, while reducing the initial compressive strength loss of concrete composition, dispersing agent while reducing the amount of the coagulant delayed to the binder, And the maintenance agent was added 0.15 ~ 0.20wt%, 0.5 ~ 0.7wt% relative to the binder, respectively, it could be confirmed that more than 2 hours pot life.
아래 [표 6]은 상기 시험예2-3의 배합 조건에서 유지제, 분산제 및 응결지연제의 첨가량에 따른 물성 변화 시험결과를 정리한 것이다.[Table 6] below summarizes the results of the change in physical properties according to the amount of the oil-containing agent, the dispersant and the coagulation delay agent under the mixing conditions of Test Example 2-3.
또, 다른 시험예로 단위 결합재량 330kg/㎥, 단위 수량 175kg/㎥, 단위 잔골재량 264kg/㎥, 단위 굵은골재량 616kg/㎥이고, 상기 결합재는 OPC 82wt%, USB 18wt%로 이루어진 경우 분산제, 유지제, 지연제를 각각 결합재 대비 0.15wt%m 0.5wt%, 0.5w% 적용한 경우(이하 '시험예3'이라 함) 재령 10시간 압축강도 8.5MPa, 가사시간 120분이 확보되며, 믹싱 후 120분 경과 후까지 슬럼프가 170mm로 측정되었다.In another test example, the unit binder amount 330kg / ㎥, unit quantity 175kg / ㎥, unit aggregate aggregate 264kg / ㎥, unit coarse aggregate 616kg / ㎥, the binder is OPC 82wt%, USB 18wt% dispersant, oil and fat First, when 0.15wt% m 0.5wt% and 0.5w% of the retardant is applied to the binder (hereinafter referred to as 'Test Example 3'), the compressive strength is 8.5 MPa for 10 hours and 120 minutes for the pot life, and 120 minutes after mixing. The slump was measured at 170 mm until the passage of time.
위 시험예3과 같은 배합 조건에서 초조강 결합재를 전체 결합재 대비 15wt% 적용하고, 분산제, 유지제 및 지연제를 각각 결합재 대비 0.15~0.2wt%, 0.5~0.7wt%, 0.10~0.15wt% 적용한 경우에도 슬럼프 저하 없이 재령 12시간 압축강도 5MPa 이상 및 가사시간 120분이 확보됨을 확인하였다.Under the same mixing conditions as in Test Example 3, the super-strength steel binder was applied 15wt% of the total binder, and the dispersant, the oil retainer and the retardant were applied 0.15 ~ 0.2wt%, 0.5 ~ 0.7wt%, 0.10 ~ 0.15wt%, respectively. In this case, it was confirmed that the 12-hour compressive strength of 5 MPa or more and the pot life time of 120 minutes were secured without deteriorating the slump.
본 발명은 상기에서 언급한 바와 같이 바람직한 실시예와 관련하여 설명되었으나, 본 발명의 요지를 벗어남이 없는 범위 내에서 다양한 수정 및 변형이 가능하며, 다양한 분야에서 사용 가능하다. 따라서 본 발명의 청구범위는 이전 발명의 진정한 범위 내에 속하는 수정 및 변형을 포함한다.Although the present invention has been described in connection with the preferred embodiment as mentioned above, various modifications and variations are possible without departing from the gist of the present invention, and can be used in various fields. Therefore, the claims of the present invention include modifications and variations that fall within the true scope of the previous invention.
Claims (4)
단위 결합재량 330~340kg/㎥, 단위 수량 170~200kg/㎥이고,
상기 결합재는 시멘트 82~85wt% 및 초조강 결합재 15~18wt%로 조성되되,
상기 초조강 결합재는 CSA(Calcium Sulfo Aluminate) 및 석고가 혼합된 분체 조성물로서, 함유된 CaO와 SO3의 중량비가 1:1.9~2.3이고, 함유된 Al2O3와 SO3의 중량비가 1:0.8~1.1이고,
응결지연제가 상기 결합재 대비 0.2~0.25wt% 첨가되고,
NS(Na2SO4)가 상기 결합재 대비 1~3wt% 첨가되어,
양생온도 12~13℃의 간절기 조건에서 재령 28일 압축강도 24~40MPa 및 슬럼프 150mm 이상이 충족되면서, 가사시간 2시간이 확보되고,
재령 12시간 압축강도가 5MPa을 초과하는 것을 특징으로 하는 초조강 콘크리트 조성물.
As a concrete composition formed by the combination of a binder, fine aggregate, coarse aggregate and water,
Unit binding capacity of 330 ~ 340kg / ㎥, unit quantity of 170 ~ 200kg / ㎥,
The binder is composed of 82 ~ 85wt% cement and 15 ~ 18wt% cemented carbide,
The super-strength steel binder is a powder composition of Calcium Sulfo Aluminate (CSA) and gypsum, the weight ratio of CaO and SO 3 is 1: 1.9 ~ 2.3, the weight ratio of Al 2 O 3 and SO 3 1: 0.8-1.1,
Condensation retardant is added 0.2 ~ 0.25 wt% relative to the binder,
NS (Na 2 SO 4 ) is added 1 to 3wt% compared to the binder,
With 28-day compressive strength of 24 to 40 MPa and slump of 150 mm or more, the pot life is secured for 2 hours under the season condition of curing temperature 12 ~ 13 ℃.
The 12-hour compressive strength concrete composition, characterized in that the compressive strength exceeds 5MPa.
단위 결합재량 330~340kg/㎥, 단위 수량 170~200kg/㎥이고,
상기 결합재는 시멘트 82~85wt% 및 초조강 결합재 15~18wt%로 조성되되,
상기 초조강 결합재는 CSA(Calcium Sulfo Aluminate) 및 석고가 혼합된 분체 조성물로서, 함유된 CaO와 SO3의 중량비가 1:1.9~2.3이고, 함유된 Al2O3와 SO3의 중량비가 1:0.8~1.1이고,
응결지연제가 상기 결합재 대비 0.1~0.15wt% 첨가되고,
분산제가 상기 결합재 대비 0.15~0.20wt% 첨가되고,
유지제가 상기 결합재 대비 0.5~0.7wt% 첨가되어,
양생온도 12~13℃의 간절기 조건에서 재령 28일 압축강도 24~40MPa 및 슬럼프 150mm 이상이 충족되면서, 가사시간 2시간이 확보되고,
재령 12시간 압축강도가 5MPa을 초과하는 것을 특징으로 하는 초조강 콘크리트 조성물.As a concrete composition formed by the combination of a binder, fine aggregate, coarse aggregate and water,
Unit binding capacity of 330 ~ 340kg / ㎥, unit quantity of 170 ~ 200kg / ㎥,
The binder is composed of 82 ~ 85wt% cement and 15 ~ 18wt% cemented carbide,
The super-strength steel binder is a powder composition of Calcium Sulfo Aluminate (CSA) and gypsum, the weight ratio of CaO and SO 3 is 1: 1.9 ~ 2.3, the weight ratio of Al 2 O 3 and SO 3 1: 0.8-1.1,
Condensation retardant is added 0.1 ~ 0.15wt% compared to the binder,
Dispersant is added 0.15 ~ 0.20wt% compared to the binder,
Oil is added 0.5 ~ 0.7wt% relative to the binder,
With 28-day compressive strength of 24 to 40 MPa and slump of 150 mm or more, the pot life is secured for 2 hours under the season condition of curing temperature 12 ~ 13 ℃.
The 12-hour compressive strength concrete composition, characterized in that the compressive strength exceeds 5MPa.
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