고로슬래그 치환율에 따른 콘크리트의 경화특성

국문 초록 (Abstract)

본 연구에서는 고로슬래그 치환율에 따른 콘크리트의 경화특성에 대해 검토하고자 하였으며, 본 연구의 내용 및 범위는 다음과 같다.

제 1장에서는 본 연구의 서론으로서, 고로슬래그 미분말의 치환율이 콘크리트의 경화특성에 미치는 영향에 대한 본 연구의 배경, 목적, 내용 및 범위에 대하여 기술하였다.
제 2장에서는 본 연구에서 사용되는 고로슬래그의 개요 및 수화특성에 대해 서술하였으며, 고로슬래그를 활용한 콘크리트의 일반적인 특성에 대해 검토하였다.
제 3장에서는 본 연구를 수행하기 위한 실험에 관한 장으로써, 고로슬래그 치환율에 따른 콘크리트의 경화특성을 평가하기 위한 실험계획 및 방법, 사용재료를 제시하고, 실험을 통해 얻어진 결과를 검토？분석하였다.
제 4장에서는 본 연구의 결론으로서, 실험을 통해 얻어진 분석결과를 종합적으로 서술한 후, 고로슬래그 치환율에 따른 콘크리트의 경화특성 대해 검토하였다.

다국어 초록 (Multilingual Abstract)

Domestic steel industry has shown a rapid development and production of crude steel has been gradually increased annually thanks to continuous expansion of facilities and technology development. As a result, associated byproduct such as the amount of steel slag output is also expected to increase continuously.
Thus, studies on recycling and making resource of steel slag have been conducted constantly to cut down disposing cost of waste as well as to contribute to conservation of environment. Steel slag has a number of recyclable resources such as iron, carbon, limestone, and etc. Therefore, reclamation of steel slag can lead to waste of resources and energy.
Steel slag is typically divided into blast furnace slag and steel making slag, among which blast furnace slag has a high response, used concrete admixture. However, as its strength generation becomes low at its early stage and causes construction delay, the amount of being used as admixture is limited.
Therefore, it is necessary to investigate its possibility of application as an activator’s admixture occurring in separate preliminary process of steel process.
The purpose of this study was to investigate comparison of
hardening properties of OPC concrete and concrete contained high volume blast furnace slag.
The paper consists of as follows.
Chapter 1 was an introduction of this study and provided
background, purpose, methodology, and scope.
Chapter 2 provided mechanical properties of activator and overview and hydration properties of blast furnace slag.
Chapter 3 was an experimental study, providing methods were describe including research design, methodology, and using materials and the results were reviewed and analyzed.
Chapter 4 includes the conclusions of the study, and describes the analysis results obtained from the tests and the meanings and action fields of the results.
The result of this study are summarized as the follows :
1) The results of measuring slump and amount of air of concrete replaced with blast furnace slag were shown to satisfy target scope in all stages by introducing high performance superplasticizer and AE, concluding that they didn’t have any difficulty in construction.
2) The results of measuring setting time provided that it got delayed more as the replacement ratio of the blast furnace slag increased.
Thus, it was needed for additional investigation to cut down the setting time.
3) The results of measuring compression strength of concrete, replaced with blast furnace slag showed that compression strength of early stage was increased and strength generation of its early stage was improved as the amount of CaO was increased inside of composite by mixing activator. As a result, it was expected that activator had a possibility to be used as admixture of
concrete replacement of blast furnace slag.
4) Once additional investigation and criteria were supported by using industry byproducts such as blast furnace slag and activator, production of environmental load reduction eco-friendly concrete would be available.

목차 (Table of Contents)

• 제1장 서 론 1
• 1.1 철강슬래그의 발생현황 및 특징 1
• 1.2 고로슬래그 결합재 콘크리트의 장단점 5
• 1.3 연구의 내용 및 범위 8
• 제2장 고로슬래그 발생현황 및 수화반응 특성 10
• 2.1 고로슬래그 재활용 현황 및 용도 10
• 2.1.1 고로슬래그 재활용 현황 10
• 2.1.2 고로슬래그 재활용 용도 12
• 2.2 고로슬래그 미분말의 잠재수경성 14
• 2.2.1 고로슬래그 미분말의 특성 14
• 2.2.2 시멘트의 수화반응 18
• 2.2.3 고로슬래그 미분말의 수화반응 20
• 2.3 고로슬래그 미분말을 활용한 콘크리트의 특성 22
• 제3장 고로슬래그 결합재 콘크리트의 경화특성 비교 25
• 3.1 고로슬래그 결합재 콘크리트의 실험계획 및 방법 25
• 3.1.1 실험계획 25
• 3.1.2 사용재료 26
• 3.1.3 비빔 및 시험체 제작방법 28
• 3.1.4 시험방법 29
• 3.2 고로슬래그 결합재 콘크리트의 굳지 않은 성상 및 경화 성상 32
• 3.2.1 굳지 않은 성상 33
• 3.2.2 경화 성상 35
• 제4장 결 론 42
• 참 고 문 헌 43
• ABSTRACT 45