KR101713164B1 - Mass concrete with admixture that is low viscosity and hydration crack reducing type - Google Patents

Mass concrete with admixture that is low viscosity and hydration crack reducing type Download PDF

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KR101713164B1
KR101713164B1 KR1020130159457A KR20130159457A KR101713164B1 KR 101713164 B1 KR101713164 B1 KR 101713164B1 KR 1020130159457 A KR1020130159457 A KR 1020130159457A KR 20130159457 A KR20130159457 A KR 20130159457A KR 101713164 B1 KR101713164 B1 KR 101713164B1
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weight
parts
admixture
admixture composition
hydration
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KR20150072135A (en
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전용수
최성
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주식회사 삼표산업
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/006Compositions 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 mineral polymers, e.g. geopolymers of the Davidovits type
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B22/00Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08Acids or salts thereof
    • C04B22/16Acids or salts thereof containing phosphorus in the anion, e.g. phosphates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/04Carboxylic acids; Salts, anhydrides or esters thereof
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/12Nitrogen containing compounds organic derivatives of hydrazine
    • C04B24/122Hydroxy amines
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0068Ingredients with a function or property not provided for elsewhere in C04B2103/00
    • C04B2103/0071Phase-change materials, e.g. latent heat storage materials used in concrete compositions
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/34Non-shrinking or non-cracking materials
    • C04B2111/343Crack resistant materials

Abstract

본 발명은 무기계 알카리 활성화제 100중량부에 대해 물 300 내지 700중량부, 상변위물질 100 내지 600중량부로 배합되는 것을 특징으로 하는 콘크리트 균열지수 제고(提高)용 혼화제 조성물에 관한 것이다.The present invention relates to an admixture composition for enhancing the concrete crack index, which is blended with 300 to 700 parts by weight of water and 100 to 600 parts by weight of a phase displacement material per 100 parts by weight of the inorganic alkali activator.

Description

콘크리트 균열지수 제고(提高)용 혼화제 조성물 및 저점성 수화 균열 저감형 매스콘크리트 조성물{Mass concrete with admixture that is low viscosity and hydration crack reducing type}[0001] The present invention relates to an admixture composition for concrete crack index improvement and a low viscosity hydration crack reduction type mass concrete composition,

본 발명은 콘크리트 혼화제에 관한 것으로, 수화열을 저감시키면서도 인장강도를 증대시켜 균열지수를 제고시킬 수 있는 혼화제 조성물 및 이를 첨가한 매스콘크리트 조성물에 관한 것이다.
The present invention relates to a concrete admixture, and more particularly, to an admixture composition capable of enhancing a crack index by increasing tensile strength while reducing hydration heat, and a mass concrete composition containing the admixture composition.

슬래그파우더 및 플라이애시는 콘크리트에 있어 시멘트 대체재로서 사용이 되고 있으며, 이에 대한 연구가 활발하다. 즉 산업부산물을 재활용함에 따라 탄소 배출이 없는 친환경 재료로 사용이 권장되고 있는 추세이다. Slag powder and fly ash are used as a substitute for cement in concrete. In other words, recycling of industrial by-products is encouraging the use of eco-friendly materials without carbon emissions.

하지만 콘크리트에 60%이상 다량 사용할 경우 초기강도 발현이 저하되는 등의 문제가 있어 현장에 적용하기 위해서는 이러한 문제를 해결할 수 있는 혼화제의 사용이 필수적이다. However, when the concrete is used in an amount more than 60%, there is a problem that the initial strength is lowered. Therefore, it is necessary to use an admixture which can solve the problem in the field.

최근 슬래그파우더 및 플라이애시를 결합재로 사용하기 위해 다양한 활성화제가 제시되고 있다. 그러나 이러한 활성화제의 사용으로 초기강도를 확보하여도 초기강도가 증가된 만큼 수화열도 증가하여 수화열에 의한 균열 발생이 고려되어야 한다. 특히 매스콘크리트에 슬래그파우더 및 플라이애시를 다량 혼입하기 위해서는 수화열을 효과적으로 저감시킬 수 있는 혼화제의 개발이 필요한 실정이다.
Recently, various activators have been proposed to use slag powder and fly ash as binders. However, even if the initial strength is secured by the use of such an activating agent, the hydration heat is increased as the initial strength is increased, so that cracking due to hydration heat should be considered. In particular, in order to mix a large amount of slag powder and fly ash into mass concrete, it is necessary to develop an admixture capable of effectively reducing hydration heat.

대한민국 특허등록 제0900333호Korean Patent Registration No. 0900333

이에 상기와 같은 문제를 해결하기 위해 본 발명에서는 수화열을 저감시키면서도 인장강도를 향상시켜 균열지수를 제고시킬 수 있는 혼화제 조성물 및 이를 첨가한 매스콘크리트 조성물을 제공하고자 함이다.
In order to solve the above problems, the present invention provides an admixture composition capable of improving tensile strength and reducing cracking index while reducing hydration heat, and a mass concrete composition containing the admixture composition.

상기 목적을 달성하기 위한 본 발명의 콘크리트 균열지수 제고용 혼화제 조성물은, 무기계 알카리 활성화제 100중량부에 대해 물 300 내지 700중량부, 상변위물질 100 내지 600중량부로 배합됨을 특징으로 한다. To achieve the above object, the present invention provides a concrete admixture composition for a concrete crack index comprising 300 to 700 parts by weight of water and 100 to 600 parts by weight of a phase displacement material based on 100 parts by weight of an inorganic alkali activator.

여기서 "균열지수"라함은 인장강도에 대한 수화열에 의한 응력의 비를 나타내는 것으로 "균열지수 제고"는 수화열에 의한 응력을 낮추거나 인장강도를 크게 함으로써 발현될 수 있는 것이다. 이에 본 발명의 혼화제 조성물은 콘크리트에 첨가시 상변이물질에 의해 수화열을 저감시킴으로써 수화열에 의한 응력을 낮추고자 하는 것이며, 무기계 알카리 활성화제를 통해 콘크리트의 인장강도를 높여 전체적으로 균열지수를 향상시키는 것이다. Here, the term "crack index" refers to the ratio of stress due to hydration heat to tensile strength. The "increase crack index" can be expressed by lowering the stress due to hydration heat or increasing the tensile strength. Therefore, the admixture composition of the present invention is intended to lower the stress due to hydration heat by reducing the heat of hydration by the phase foreign matter when added to the concrete, and to increase the tensile strength of the concrete through the inorganic alkali activator to improve the overall crack index.

더욱 바람직하게 본 발명의 혼화제 조성물은 물에 무기계 알카리 활성화제를 20 내지 60℃에서 5 내지 8분간 혼합한 후에 상변이물질을 혼합하여 제조되는 것을 특징으로 하는데, 상기 온도한정범위에서 무기계 알카리 활성화제가 적정의 용해도를 나타내기 때문이다. More preferably, the admixture composition of the present invention is prepared by mixing an inorganic alkaline activator with water at 20 to 60 DEG C for 5 to 8 minutes and then mixing the foreign materials with the phase, wherein the inorganic alkaline activator is titrated Of the solubility.

또한, 상기 상변이물질은, 옥타데칸, 나프탈렌, 아세트아미드, 스테아르산, 프로피온아미드, 시안아미드로 황산나트륨 수용액(Na2SO4ㅇ10H2O), 아세트산나트륨 수용액(NaCH3COOㅇ3H2O) 중 하나 또는 둘이상의 혼합물인 것을 특징으로 한다. 상기 상변이물질은 일정한 상전이온도(phase transition temp)에서 상변화에 필요한 열량을 외부에서 흡수하는 특성을 지니는 것으로, 콘크리트에 첨가되는 경우 시멘트의 수화반응으로 인한 수화온도가 해당 상변이물질의 상전이온도에 도달하게 되면 물리적인 상변화에 의해 시멘트의 수화열을 흡수함에 따라 전체 콘크리트의 수화열을 저감시키도록 하는 것이다. The upper phase foreign material is a mixture of one or two of octadecane, naphthalene, acetamide, stearic acid, propionamide and cyanamide in an aqueous solution of sodium sulfate (Na2SO4 10H2O) and an aqueous solution of sodium acetate (NaCH3COO3H2O) do. The phase-change foreign matter has a property of externally absorbing the heat required for phase change at a certain phase transition temp. When added to concrete, the hydration temperature due to the hydration reaction of cement reaches the phase transition temperature of the phase- , The hydration heat of cement is absorbed by the physical phase change and the heat of hydration of the whole concrete is reduced.

또한 상기 무기계 알카리 활성화제는, 황산나트륨(Na2SO4), 아질산나트륨(NaNO2), 탄산나트륨(CaCO3), 알루민산나트륨(NAAlO2) 중 하나 또는 둘이상의 혼합물인 것을 특징으로 한다. 이러한 무기계 알카리 활성화제는 본 발명의 혼화제 조성물이 콘크리트 조성물에 있어 특히 슬래그 파우더/플라이애시를 포함하는 결합재에서 강도증진 즉 인장강도를 증진시키기 위해 첨가되는 것이다. 일반적으로 중합반응은 Si-Al 함유 광물질이 NaOH 또는 KOH와 반응하는 것으로, 플라이애시는 SiO2와 Al2O3의 함유율이 비교적 높아 중합반응으로 활성화시킬 수 있는 결합재 조성이다. 그러나 플라이애시를 사용한 경우에는 유리(glassy) 피막이 형성되어 있기 때문에 이 피막을 파괴시켜 플라이애시의 반응을 촉진시키기 위해서는 pH 13 이상 매우 높은 알칼리 환경이 필요한 바, 본 발명에서는 이를 위해 무기계 알카리 활성화제를 첨가하는 것이다. The inorganic alkaline activator is characterized by being a mixture of one or two of sodium sulfate (Na2SO4), sodium nitrite (NaNO2), sodium carbonate (CaCO3) and sodium aluminate (NAAlO2). Such an inorganic alkaline activator is one in which the admixture composition of the present invention is added in concrete compositions, particularly to improve strength, i.e., tensile strength, in a binder including slag powder / fly ash. Generally, the polymerization reaction is the reaction of the Si-Al-containing minerals with NaOH or KOH, and the fly ash has a relatively high content of SiO 2 and Al 2 O 3 . However, in the case of using fly ash, since a glassy film is formed, a very high alkaline environment of pH 13 or more is required in order to break down the film to promote the reaction of fly ash. In the present invention, .

한편 본 발명의 콘크리트 균열지수 제고용 혼화제 조성물이 첨가된 매스콘크리트 조성물은 시멘트와 슬래그파우더/플라이애시를 포함하는 결합재 및 상기 혼화제 조성물이 포함되되, 상기 혼화제 조성물은 결합재 100중량부 대비 0.6 내지 1.8중량부가 혼합되는 것을 특징으로 한다. Meanwhile, the mass concrete composition to which the concrete admixture composition of the present invention is added includes a binder including cement, slag powder / fly ash, and the admixture composition, wherein the admixture composition has a composition of 0.6 to 1.8 wt. Is added and mixed.

더욱 바람직하게 결합재 100중량부에 대해 폴리카르본산 0.6 내지 1.0중량부, 트리에탄올아민 0.6 내지 1.0중량부가 더 배합되는 것이 타당한 바, 이는 본 발명이 결합재 조성으로 슬래그 파우더를 포함하고 있는 바, 슬래그 파우더의 시멘트 치환량이 증가하는 경우 작업성이 저하되는 문제 및 초기강도 저하문제를 해결하기 위한 것이다.It is more preferable that 0.6 to 1.0 part by weight of polycarboxylic acid and 0.6 to 1.0 part by weight of triethanolamine are added to 100 parts by weight of the binder. This is because the present invention includes slag powder as a binder composition, This is to solve the problem that the workability is lowered and the problem of initial strength reduction when the amount of cement replacement increases.

이를 위해 첨가되는 폴리카르본산의 경우는 슬래그 파우더의 시멘트 치환량의 증가에 의해 분산성 저하의 문제를 해결하기 위해 첨가되는 것이며, 이렇게 폴리카르본산의 첨가에 의해 분산성을 향상시키는 경우 초기강도가 저하되는 문제가 있을 수 있는 바, 이에 본 발명에서는 감수성을 조절함으로써 분산성을 유지하면서도 초기강도 저하를 보완하는 트리에탄올아민을 더 첨가하게 되는 것이다. The polycarboxylic acid to be added for this purpose is added in order to solve the problem of lowering the dispersibility due to the increase of the cement substitution amount of the slag powder. When the dispersibility is improved by adding the polycarboxylic acid, Therefore, in the present invention, triethanolamine, which compensates for the initial strength reduction, is further added while maintaining the dispersibility by adjusting the sensitivity.

상기 폴리카르본산은 결합재 100중량부 대비 0.6 내지 1.0중량부로 한정하는데, 그 이유는 0.6중량부미만이면 유동성 향상 효과가 미미하고, 1.0중량부를 초과하면 유동성이 오히려 저하되고, 응결 및 수화가 지연되어 비경제적인 배합이 되는 문제가 있으므로 이와 같이 한정하는 것이다. The polycarboxylic acid is limited to 0.6 to 1.0 part by weight based on 100 parts by weight of the binder. If the amount of the polycarboxylic acid is less than 0.6 part by weight, the effect of improving fluidity is insignificant. If the amount is more than 1.0 part by weight, There is a problem that it becomes uneconomical combination, so it is limited in this way.

또한, 상기 트리에탄올아민은 결합재 100중량부에 대해 0.6 내지 1.0중량%로 한정하는데, 이는 안정화제로서 유동성이 발현되도록 하면서도 초기 감수율을 향상시켜 고감수율에 의해 초기강도가 확보되도록 하기 위해 상기와 같이 한정하는 것이다.The triethanolamine is limited to 0.6 to 1.0% by weight based on 100 parts by weight of the binding material. In order to improve the initial water retention and ensure the initial strength by a high water reducing rate while allowing fluidity to develop as a stabilizer, .

또한, 본 발명은 무기계 알카리 활성화제에 의해 슬래그 파우더를 활성화 시킴에 따라 급결의 문제가 발생될 수 있는 바, 이에 더하여 트리폴리인산나트륨을 더 첨가함으로써 이를 해결토록 하는 것이다.Further, in the present invention, the problem of rapid precipitation may be caused by activating the slag powder by the use of the inorganic alkaline activator. In addition, the addition of sodium tripolyphosphate solves this problem.

여기서 트리폴리인산나트륨은 결합재 100중량부에 대해 0.1 내지 1중량부가 배합되도록 하는 것이 타당한바, 상기와 같이 한정하는 이유는 한정범위보다 작은 경우 반응지연의 효과가 미미하며, 한정범위를 초과하는 경우는 지나치게 반응지연을 유도함으로써 초기강도 발현에 문제가 있으므로 이와 같이 한정을 하는 것이다.
Here, it is appropriate that 0.1 to 1 part by weight of sodium tripolyphosphate is blended with respect to 100 parts by weight of the binder. The reason for this limitation is that if the amount is less than the limited range, the effect of delaying the reaction is insignificant. There is a problem in inducing an initial strength by inducing too much reaction delay, so that the limitation is made.

상술한 바와 같은 본 발명의 콘크리트 균열지수 제고용 혼화제 조성물은 슬래그파우더/플라이애시의 시멘트 치환량이 큰 결합재를 사용하더라도 수화열을 저감시킬 수 있음과 동시에 인장강도를 향상시킬 수 있어 균열지수를 향상시킬 수 있는 장점이 있다.
The concrete admixture composition of concrete cracking index agent of the present invention as described above can reduce hydration heat and improve tensile strength even when a binder having a large amount of cement substitution of slag powder / fly ash is used, There is an advantage.

도 1은 무기계 알카리 활성화제의 용해도 실험결과를 나타내는 그래프.
도 2는 재령에 따른 수화열 측정결과를 나타내는 그래프.
도 3은 재령에 따른 강도발현율을 나타내는 그래프.
도 4는 균열지수와 타설고의 관계를 나타내는 그래프.
1 is a graph showing solubility experiment results of an inorganic alkaline activator;
2 is a graph showing the results of hydration heat measurement according to age.
Fig. 3 is a graph showing the intensity incidence rate according to age. Fig.
Fig. 4 is a graph showing the relationship between the crack index and the pouring height.

이하, 실험 예를 통하여 본 발명의 실시 예를 보다 상세하게 설명한다.
Hereinafter, embodiments of the present invention will be described in more detail with reference to experimental examples.

<실험 예 1><Experimental Example 1>

무기계Inorganic 알카리Alkaline 활성제 용해도 실험  Activator solubility experiment

물 100중량부에 대해 무기계 알카리 활성제로 황산나트륨(Na2SO4) 및 아질산나트륨(NaNO2) 혼합물을 30중량부로 혼합하여 온도를 달리하며 용해도를 측정하였다. 그 결과가 도 1에 도시되고 있다.30 parts by weight of a mixture of sodium sulfate (Na2SO4) and sodium nitrite (NaNO2) as an inorganic alkaline activator was mixed with 100 parts by weight of water and the solubility was measured at different temperatures. The results are shown in Fig.

도 1에서 보는 바와 같이 무기계 알카리 활성제는 20℃에서 용해도가 급증하며, 온도가 상승함에 따라 용해도가 증가하고, 60℃이상에서는 용해도의 증가율이 미미한 것을 알 수 있으며 에너지면에서도 불리한 것을 알 수 있다. 따라서 본 발명의 혼화제 조성물은 물에 무기계 알카리 활성화제를 첨가하되, 20 내지 60℃온도범위에서 용해토록 하는 것이 타당한 것을 알 수 있다. 이와 같이 물에 무기계 알카리 활성화제를 용해토록 하는 것은 물과 함께 용해된 무기계 알카리 활성화제가 균일하게 분산되도록 하여 콘크리트에서 결합재의 조성으로 배합되는 슬래그파우더/플라이애시와 반응이 균일하게 이루어지도록 하기 위함이다.
As shown in FIG. 1, the solubility of the inorganic alkaline activator increases rapidly at 20 ° C., and the solubility increases with increasing temperature, and the increase rate of solubility at 60 ° C. or more is insignificant. Therefore, it is understood that the admixture composition of the present invention is prepared by adding an inorganic alkaline activator to water and dissolving in the temperature range of 20 to 60 ° C. In order to dissolve the inorganic alkaline activator in water as described above, the inorganic alkaline activator dissolved in water is uniformly dispersed, so that the reaction with the slag powder / fly ash mixed in the composition of the binder in the concrete can be uniform .

<실험 예 2><Experimental Example 2>

수화열Hydration heat 및 강도 실험  And strength test

각각의 시료에 대해 물-결합재(시멘트+슬래그파우더+플라이애시)비가 30 내지 40%로 구성되며, 결합재는 슬래그파우더 및 플라이애시를 중량비로 1:1로 하고 시멘트 치환량을 70중량%로 하였으며, 본 발명의 혼화제 조성물에 있어 물, 무기계 알카리 활성제, 상변이물질의 배합량을 달리하여 각각 첨가하였다. For each sample, the ratio of water-binder (cement + slag powder + fly ash) was 30 to 40%, the binder was 1: 1 by weight of slag powder and fly ash, the cement replacement amount was 70% In the admixture composition of the present invention, water, an inorganic alkaline activator, and a phase-change foreign material were added in different amounts, respectively.

그 결과가 표 1에 도시되고 있는데, 시료 a의 경우보다 타 시료들에서 수화열 감소량이 증가하고, 압축강도가 증가하는 것을 알 수 있다. The results are shown in Table 1. It can be seen that the amount of decrease in hydration heat is increased and the compressive strength is increased in the other samples than in the case of Sample a.

즉 본 발명의 혼화제 조성물이 첨가되는 경우가 수화열을 감소시키면서 강도를 증가시켜 결국 균열저감지수를 향상시키게 되는 것이다. 한편 본 발명의 혼화제 조성물을 배합하되 수화열 저감 및 강도향상의 기능발현 정도 등을 고려하면 수화열 감소량을 5℃이상으로 하고, 강도증가율을 110%이상으로 기준을 잡아 무기계 알카리 활성화제 100중량부에 대해 물 300 내지 700중량부, 상변위물질 100 내지 600중량부로 배합하는 것이 타당한 것을 알 수 있다. That is, when the admixture composition of the present invention is added, the strength of hydration is decreased while the hydration heat is decreased, thereby improving the crack reduction index. On the other hand, when the admixture composition of the present invention is compounded and the degree of hydration heat reduction is set to 5 ° C or more and the strength increase rate is set to 110% or more, 300 to 700 parts by weight of water, and 100 to 600 parts by weight of phase displacement material.

시료 b의 경우 상대적으로 상변위물질의 첨가량이 작아 수화열감소량이 작고 시료 i의 경우 상대적으로 상변위물질의 첨가량이 많아 수화열감소량은 크나 강도증가율이 미미한 것을 알 수 있는 바, 상기와 같은 적정의 배합범위를 제시하게 되는 것이다.
In the case of sample b, the addition amount of the phase displacement material is relatively small, so that the decrease in the heat of hydration is small. In the case of sample i, the addition amount of the phase displacement material is relatively large, so that the hydration heat reduction amount is large but the strength increase rate is insignificant. It would be possible to provide a range.

water 무기계
활성제
Inorganic
Activator
상변위
물질
Phase displacement
matter
시료sample 최고수화열
(℃)
Highest hydration heat
(° C)
수화열
감소량
Hydration heat
Reduction amount
강도
(Mpa)
burglar
(Mpa)
강도
증가율
burglar
Growth rate
00 00 00 aa 65.365.3 -- 27.527.5 -- 720720 100100 8080 bb 60.660.6 4.74.7 29.129.1 105.8%105.8% 700700 100100 100100 cc 60.260.2 5.15.1 30.430.4 110.1%110.1% 620620 100100 200200 dd 6060 5.35.3 30.530.5 110.9%110.9% 580580 100100 300300 ee 59.159.1 6.26.2 30.830.8 112.0%112.0% 470470 100100 400400 ff 5959 6.36.3 31.231.2 113.5%113.5% 370370 100100 500500 gg 58.658.6 6.76.7 3131 112.7%112.7% 300300 100100 600600 hh 57.157.1 8.28.2 30.430.4 110.5%110.5% 270270 100100 650650 ii 56.756.7 8.68.6 27.727.7 100.7%100.7%

<실험 예 3><Experimental Example 3>

재령에 따른 According to age 수화열Hydration heat 및 강도 실험  And strength test

상기 실험예 2에서 시료 a, i, c에 대해 재령에 따른 수화열을 측정하였으며, 그 결과가 도 2에 도시되고 있다. The hydration heat of each of the samples a, i, and c was measured according to the age in Experimental Example 2, and the results are shown in FIG.

도 2에 의하면 시료 i의 경우가 가장 재령에 따른 수화열 저감치가 큰 것을 알 수 있으며, 시료 c의 경우도 재령에 따라 시료 a보다 수화열이 더 저감되는 것을 알 수 있다. 즉 본 발명의 혼화제가 첨가되는 경우 각 재령에서 수화열을 저감시킬 수 있어 각 재령에서 균열을 제어할 수 있는 효과가 기대되는 것이다. According to FIG. 2, it can be seen that the hydration heat reduction value according to the age is the largest in the case of the sample i, and in the case of the sample c, the hydration heat is further reduced compared to the sample a according to the ages. That is, when the admixture of the present invention is added, hydration heat can be reduced at each age, and the effect of controlling cracks at each age is expected.

또한, 상기 실험예 2에서 시료 a, i, c에 대해 재령에 따른 강도를 측정 하였으며, 그 결과가 도 3에 도시되고 있다. In Experimental Example 2, the strengths of the samples a, i, and c according to the age were measured, and the results are shown in Fig.

도 3에 의하면 시료 i의 경우도 3일 재령에서 강도발현율이 110%를 초과하나 1, 7, 28일재령에서는 강도발현율이 100%를 초과하지만 110%에 미달하는 결과가 도출되는 것을 알 수 있는 반면 시료 c의 경우 모든 재령에서 110%를 초과하는 것을 알 수 있다.
FIG. 3 shows that in the case of sample i, the intensity expression rate exceeded 110% in the age of 3 days, but the intensity expression rate exceeded 100% in the age of 1, 7, and 28 days but was less than 110% On the other hand, sample c is more than 110% in all ages.

<실험 예 4><Experimental Example 4>

균열지수 및 Crack index and 타설고Put 실험  Experiment

상기 실험 예 3에 의해 도출되는 수화열 및 압축강도에 의해 균열지수를 도출하였으며, 균열지수 1.2를 기준으로 하여 각 시료의 타설고를 도출하였다. The crack index was derived from the heat of hydration and compressive strength derived from Experimental Example 3, and the height of each sample was determined based on the crack index of 1.2.

도 4에서 보는 바와 같이 균열지수는 시료 c가 가장 높게 도출되는 것을 알 수 있는 바, 본 발명의 혼화제 조성물을 첨가하는 경우 균열지수를 크게 하여 균열저항성을 향상시킬 수 있음을 알 수 있다.As can be seen from FIG. 4, it can be seen that the sample c has the highest crack index, and when the admixture composition of the present invention is added, the crack index can be increased to improve the crack resistance.

특히 시료 i보다 시료 c가 더 높은 균열지수를 도출되는 것으로 상변이물질을 첨가함에 있어 적정의 한정범위가 있으며 이를 초과하는 경우 물론 혼화제를 첨가하지 않는 경우보다 균열지수를 높일 수 있으나 경제적인 측면, 효과를 고려하여 상기 실험 예 1에서 보는 바와 같이 본 발명의 혼화제 조성물에 있어 물, 무기계 알카리 활성화제, 상변이물질은 무기계 알카리 활성화제 100중량부에 대해 물 300 내지 700중량부, 상변위물질 100 내지 600중량부로 배합하는 것이 타당한 것을 알 수 있다. Particularly, since the sample c has a higher crack index than the sample i, it is possible to increase the crack index more than when the admixture is not added. The water, the inorganic alkaline activator, and the phase change material in the admixture composition of the present invention, as shown in Experimental Example 1, were prepared by mixing 300 to 700 parts by weight of water, 100 to 600 parts by weight of water, It is understood that it is proper to blend with parts by weight.

또한, 하기 표 2에서 보는 바와 같이 균열지수 기준 1.2가 되는 타설높이를 보면 시료 a < 시료 i < 시료 c인 것을 알 수 있는 바, 이를 통해서도 본 발명의 혼화제 조성물에 있어 상기 상변이물질의 적정 배합비가 도출되는 것을 알 수 있다.
Also, as shown in Table 2 below, it can be seen that the sample a <sample i <sample c, as seen from the pitting height of 1.2 as the criterion of the crack index, also shows that the optimum blending ratio of the phase foreign matter in the admixture composition of the present invention It can be seen that it is derived.

타설고Put (a)대비 증가율(a) the increase rate aa 1.9471.947 100.0%100.0% ii 2.1652.165 111.2%111.2% cc 2.2342.234 114.7%114.7%

Claims (7)

삭제delete 삭제delete 삭제delete 삭제delete 시멘트와 슬래그 파우더를 포함하는 결합재 및 혼화제 조성물이 포함되되, 상기 혼화제 조성물은 결합재 100중량부 대비 0.6 내지 1.8중량부가 혼합되며,
상기 혼화제 조성물은 무기계 알카리 활성화제로 황산나트륨(Na2SO4) 및 아질산나트륨(NaNO2) 혼합물 100중량부에 대해 물 300 내지 700중량부, 상변위물질 100 내지 600중량부로 배합되되, 물에 무기계 알카리 활성화제를 20 내지 60℃에서 5 내지 8분간 혼합한 후에 상변이물질을 혼합하여 배합되고,
결합재 100중량부에 대해 분산성 향상을 위해 폴리카르본산 0.6 내지 1.0중량부가 더 배합되며, 분산성을 유지하면서도 초기강도 저하를 보완하기 위해 트리에탄올아민 0.6 내지 1.0중량부가 더 배합되는 것을 특징으로 하는 콘크리트 균열지수저감용 혼화제 조성물이 첨가된 매스콘크리트 조성물.
A binder and an admixture composition including cement and slag powder, wherein the admixture composition is mixed in an amount of 0.6 to 1.8 parts by weight based on 100 parts by weight of the binder,
The admixture composition is prepared by mixing 300 to 700 parts by weight of water and 100 to 600 parts by weight of a phase displacement material with respect to 100 parts by weight of a mixture of sodium sulfate (Na2SO4) and sodium nitrite (NaNO2) as an inorganic alkaline activator, At 60 to &lt; RTI ID = 0.0 &gt; 60 C &lt; / RTI &gt; for 5 to 8 minutes,
0.6 to 1.0 part by weight of polycarboxylic acid is further blended with 100 parts by weight of the binder in order to improve dispersibility and 0.6 to 1.0 part by weight of triethanolamine is further blended to compensate for the initial strength drop while maintaining dispersibility. A mass concrete composition to which an admixture composition for reducing cracking index is added.
삭제delete 제 5항에 있어서,
결합재 100중량부에 대해 트리폴리인산나트륨 0.1 내지 1중량부가 더 배합되도록 하는 것을 특징으로 하는 콘크리트 균열지수향상용 혼화제 조성물이 첨가된 매스콘크리트 조성물.
6. The method of claim 5,
Wherein 0.1 to 1 part by weight of sodium tripolyphosphate is added to 100 parts by weight of the binder, wherein the admixture composition for enhancing concrete cracking index is added.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190059481A (en) * 2017-11-23 2019-05-31 전남대학교산학협력단 Super low heat cementless binder for mass concrete

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101985750B1 (en) * 2017-08-16 2019-06-04 주식회사 제트콘코리아 Ultra-high rapid hardening and ultra-early strong polymer modified concrete containing organic and inorganic phase transition material, and a road reparing method therewith
KR102114016B1 (en) * 2018-05-11 2020-05-22 주식회사 위드엠텍 Hybrid Hydration Heat Reducer and Concrete Composition Using the Same
CN108947373A (en) * 2018-08-01 2018-12-07 浙江省通用砂浆研究院 A kind of environment-friendly phase change specialty decor spraying mortar and preparation method thereof
CN108975735B (en) * 2018-09-05 2020-08-14 华电电力科学研究院有限公司 Energy storage geopolymer and preparation method thereof
KR102135004B1 (en) * 2019-11-13 2020-07-20 형제건설(주) Heat reduction type quick-hardening cement concrete composition comprising functional binder containing and repairing method for road pavement therewith
KR102157517B1 (en) * 2019-11-13 2020-09-18 박승종 High functional quick-hardening cement concrete composition comprising latent material and repairing method for road pavement therewith
CN110862240A (en) * 2019-12-03 2020-03-06 山东永正水泥有限公司 Slag micro powder, admixture thereof, preparation method and application thereof, and cement and/or concrete
KR102196249B1 (en) * 2020-03-17 2020-12-31 (주)에이치에스드림텍 Rapid hardening cement concrete composition and road reparing method therewith
CN113513166A (en) * 2021-07-01 2021-10-19 成都建工路桥建设有限公司 Construction method of super-long structure
KR102600751B1 (en) * 2022-11-28 2023-11-13 주식회사 삼표산업 Concrete composition for workshop floors using early-strength cement and super-flat water reducing agent

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100514472B1 (en) * 2003-03-31 2005-09-13 주식회사 케이테크 Manufacturing method for Multi functional mixed cement comprising fly ash and Device therefor
KR101110322B1 (en) * 2009-08-08 2012-03-13 임창하 Composition of functional cotton spray its manufacturing method and building material using it

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070115851A (en) * 2007-11-16 2007-12-06 신한건설산업(주) A mixture for concrete mortar with insulation, thermal storage and intensity increase function
KR100900333B1 (en) 2007-12-27 2009-06-11 한국기초소재 주식회사 Cement composition with low heat and shrinkage
KR101276085B1 (en) * 2011-08-12 2013-06-18 한일시멘트 (주) flooring cement mortar composition which can crack prevention

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100514472B1 (en) * 2003-03-31 2005-09-13 주식회사 케이테크 Manufacturing method for Multi functional mixed cement comprising fly ash and Device therefor
KR101110322B1 (en) * 2009-08-08 2012-03-13 임창하 Composition of functional cotton spray its manufacturing method and building material using it

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190059481A (en) * 2017-11-23 2019-05-31 전남대학교산학협력단 Super low heat cementless binder for mass concrete
KR102014870B1 (en) 2017-11-23 2019-08-27 전남대학교산학협력단 Super low heat cementless binder for mass concrete

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