• 제목/요약/키워드: blast furnace

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산지 별 고로슬래그 미분말 변화에 따른 무시멘트 순환잔골재 모르타르의 기초적 특성 평가 (Evaluation of the Fundamental Properties of Zero-Cement Mortar Using Blast Furnace Slag From Different Areas)

  • 조양;이홍규;강병회;조만기;한민철;한천구
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2014년도 춘계 학술논문 발표대회
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    • pp.210-211
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    • 2014
  • Nowadays, as to reduce the emission volume of CO2, blast furnace slag has been widely used to replacement of cement. Techniques about using industrial by-products has been extensively studied. For the previous study, blast furnace slag has been used with recycled fine aggregates. In thess study, considering about the different properties of blast furnace slag, as the change of blaine and chemical performances of blast furnace slag, the results of flowability and compressive strength has been analysed.

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알칼리 자극제 종류에 의한 고로슬래그 미분말 모르타르의 강도 특성 (Mechanical Properties of Blast Furnace Slag Fineness Mortar according to Alkali Activator)

  • 김종희;김규용;신경수;남정수;구경모;윤용상
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2011년도 추계 학술논문 발표대회
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    • pp.217-218
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    • 2011
  • The advantages of blast-furnace slag concrete may include lower hydration heating velocity, restraint on concrete temperature increase, long-age strength improvement due to latent hydraulic reaction, improved water tightness, and repulsion to chemical erosion. These advantages contribute to the high quality of the blast-furnace slag concrete. However, the blast-furnace slag concrete has its limitations as well. These disadvantages may include retarded setting and elongated retention of mold due to the weak strength of early-age. Nevertheless, much research is currently under way to improve the aforementioned issues. To improve activity of blast furnace slag powder, alkaline irritants has been used. In this study, we analyze effect on activity fineness and rate of substitution of Alkali Activator toward activity.

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수재사 모릍의 Flow특성에 관한 연구 (An Experimental Study on the Flow Characteristics of Mortar use Quenched Blast-Furnace Slag)

  • 양범석;임남기;이영도;이종균;정란;정상진
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1997년도 가을 학술발표회 논문집
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    • pp.215-222
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    • 1997
  • Flow experimental on not to be solid mortar which use Quenched Blast-furnace Slag as a fine aggregate was carried out for basic research data about fundamental study of application possibility of Quenched Blast-furnace Slag as a fine aggregate. It gives following result. The substitution rate is inversely proportional to Flow and C/S-rate same that. The relation with W/C-rate augment appear proportional : in case of C/S-rate, 1:3 increasing degree is a half of sand mortar that. Consequencely, Quenched Blast-furnace Slag motar is a counteraction to Flow in as same water content per unit. But suitable substitution rate and C/S-rate influence a little to the mortar consistency. And that reason, if C/S-rate and substitution rate will be regulated when we mix the mortar with quenched Blast-furnace Slag. that will be economic mixture.

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고로슬래그미분말의 전과정 CO2 배출원단위 평가 및 데이터베이스 구축 (Constructing Database for Estimating Life Cycle CO2 emissions from Blast Furnace Slag)

  • 박정훈;태성호;김태형;이강진
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2012년도 춘계 학술논문 발표대회
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    • pp.49-51
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    • 2012
  • This study was conducted as a part of database construction for development of CO2 assessment system for concrete to assess CO2 emissions and analyze characteristics of blast furnace slag manufactured in Korea through life cycle assessment method. For this, life cycle CO2 emissions assessment technique for construction materials was examined. The entire manufacturing process for blast furnace slag was analyzed on blast furnace slag manufacturer in Korea for application of assessment technique. Life cycle CO2 assessment was performed on blast furnace slag after classifying assessment process into raw material production step, raw material transportation step and construction material manufacture step.

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조강형 고로 슬래그 시멘트 및 보통 포틀랜드 시멘트 대체용 고로 슬래그 시멘트에 관한 연구 (A Study of Blast Furnace Slag Cement of High Early Strength and Replacement Ordinary Portland Cement)

  • 권기동;최현국
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2000년도 가을 학술발표회 논문집(II)
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    • pp.1211-1214
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    • 2000
  • The purpose of this paper was to study of blast furnace slag cement of high early strength and replacement ordinary portland cement. we prepared the specimens of cement and concrete with various mixing proportions of elementary materials. For example, clinker, gypsum(1~10%), fineness $4, 000~6, 000cm^2/g$ of blast furnace slag(30~50%), limestone etc. As a result of this study, fineness $(4, 000cm^2/g)$ blast furnace slag was of used replacement ordinary portland cement and fineness $(6, 000cm^2/g)$ blast furnace slag was of used blast furnace slag cement of high early strength.

고로슬래그 미분말을 혼입한 기포콘크리트의 물리적 특성 (Physical Properties of Foamed Concrete using Blast-Furnace Slag)

  • 조은석;임정준;송하영;이상수
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2019년도 추계 학술논문 발표대회
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    • pp.164-165
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    • 2019
  • Light-weight foamed concrete using cement as a raw material consumes a lot of energy and generates $CO_2$ because of the high temperature firing process in the manufacturing process of cement. This study was carried out to evaluate the use of blast furnace slag through the properties analysis by substituting a certain amount of blast furnace slag as an industrial by-product as a substitute for cement. The experimental results showed similar characteristics to those of using only cement when the blast furnace slag fine powder was used in an appropriate amount. Therefore, if a certain amount of cement is replaced with blast furnace slag powder, it can maintain similar quality, reduce natural resources and energy consumption, and reduce carbon dioxide emissions.

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고로슬래그 미분말을 사용한 콘크리트의 공학적 특성에 관한 연구 (A Study on the Engineering Properties of Concrete Using Blast-furnace Slag Powder)

  • 이상수;원철;김동석;박상준
    • 콘크리트학회논문집
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    • 제12권4호
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    • pp.49-58
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    • 2000
  • There are many methods to improve the performance of concrete. Especially, granuated blast furnace slag. by-products used in concrete as the replacement material of cement, could contribute to improve the fluidity, resistance of chemical attack and strength of concrete. Also, it could contribute to decrease the rate of generating hydration heat, in addition to cost-down of concrete and prevention of enviromental pollution. Therefore, in order to establish the systemical application of granuated blast furnace slag in normal concrete, the engineering properties of concrete, such as fluidity, strength, setting and hydration properties etc.. was evaluated. In this study, replacement ratio of granuated blast furnace slag was 0, 30, 50, 70(%), and target slump was 8, 12, 15, 18(cm). Results from the experiment, granuated blast furnace slag showed the outstanding effects of improving the engineering properties of concrete. From now on, positive application of granuated blast furnace slag is expected in the point of improving the performance and cost-down of concrete.

고로슬래그를 사용한 고강도 부순모래 경화콘크리트의 물성에 관한 실험적 연구 (An Experimental Study on the Properties of the High Strength Crushed Sand Concrete Using Blast-Furnace Slag)

  • 최영화;김종인
    • 한국산업융합학회 논문집
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    • 제8권3호
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    • pp.169-176
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    • 2005
  • The purpose of this study is to develop the high strength crushed sand concrete in conditions of water binder ratios of 25, 30, 35% and blast-furnace slag substitutions of 0, 15, 30, 45%. Additionally, in case of water binder ratio of 30%, the maximum size of coarse aggregate is two kinds of 13, 19 mm. The conclusions of this study are as follows ; 1. The compressive strength appeared lower in early age as compared with that of plain concrete according to increasing of the blast-furnace slag substitution. But, the compressive strength was respectively 5, 6, 10% larger than that of plain concrete in case of 25, 30, 35% water binder ratios, 28 days, 30% blast-furnace slag substitution and 19mm coarse aggregate. 2. According to increasing of the blast-furnace slag substitution, the modulus of elasticity and the tensile strength of concrete increased. 3. The length change by the shrinkage increased when the larger coarse aggregate was used, and decreased according to higher blast-furnace slag substitution.

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Setting and Strength Properties of Mortar Containing Steel Furnace Slag Dust

  • Choi, Yun-Wang;Chung, Jee-Seung;Moon, Dae-Joong;Shin, Hwa-Cheol;Jang, Lee-Duck
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2003년도 봄 학술발표회 논문집
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    • pp.193-196
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    • 2003
  • In this paper, the experimental investigation for the setting properties of cement paste, the consistency and strength properties of mortar with steel furnace slag dust was performed and compared with those of cement paste and mortar with ground granulated blast furnace slag. When steel furnace slag dust was replaced with normal portland cement, setting time and flow value indicated to good results like as mortar with ground granulated blast furnace slag. However, mortar with steel furnace slag dust expressed to appreciably strength devaluation according to containing ratio, and did not indicate the pozzolanic reaction like as ground granulated blast furnace slag.

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서냉슬래그 모르터의 FLOW특성에 관한 연구 (An Experimental Study on the Flow Characteristics of Mortar using the Blast-Furnace Slag Sand)

  • 임남기;이종균;김성식;김종락;정상진
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1998년도 가을 학술발표회 논문집(I)
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    • pp.54-59
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    • 1998
  • This experimental Study presents the flow properties of mortar Using the Blast-furnace Slag Sand. It gives following result. The substitution rate is inversely proportional to flow. But W/C ratio is directly proportional to flow. Consequently Flow characteristics of the Blast-furnace mortar is simillar to the river sand mortar.

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