• Journal of the Korea Institute of Building Construction
• /
• v.6 no.2 s.20
• /
• pp.105-109
• /
• 2006

Modern residing equipment developed much quantitatively along with economic growth but improvement for agreeable residing space of indoor environment is insufficient situation yet. Also, the latest sick-building syndrome discharging room contaminant such as Formaldehyde, toluene, radon etc. built house or buildings newly human body threaten. Radon of them is real condition that raise origination of lung cancer next to smoke. So, wish to in this research by one of solution way of these problems adsorption performance and specie performance excellent activated carbon to mortar for deconstipating suppository that is room finish fare mix and examine closely after grasp physical, mechanical special quality, hazardous substance and specie performance effect. According to result that estimate friendly-environment performance, the $CO_2$ absorption amount displayed decrease effect more than about 90% in activated carbon metathesis rate 80% and radon release amount displayed tendency that decrease about $75{\sim}85%$ in activated carbon metathesis rate 80%.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2021.11a
• /
• pp.107-108
• /
• 2021

In the global trend of countries around the world announcing the declaration of carbon neutrality, the development of low-carbon cement in the cement industry can be seen as a very important issue that can determine the future development of the cement industry in the future. Therefore, this study evaluated the strength characteristics of limestone cement paste with limestone powder of CaCO3 and refinery desulfurization waste catalyst of high Al₂O₃ content, and using a Minitab mixture design to optimize a limestone cement content. As a resuls it was confirmed that limestone cement paste with 5-10% of limestone powder and 1.25-2.5% of the waste catalyst exhibits similar compressive strength to that of OPC.

• Proceedings of the Korean Geotechical Society Conference
• /
• 2010.03a
• /
• pp.1271-1278
• /
• 2010

대규모 절토사면 유지관리 시스템 운영간 적절한 장소에 합리적인 공법을 선정하여 시공하는 것은 중요한 일이다. 다양한 옹벽 시공 공법이 있지만 시공성과 경제성을 감안할 때 옹벽의 기능을 최대한 유지하면서 친환경 기술을 접목할 수 있는 돌망태 옹벽은 최근 사면 보강에 빈번히 시공되고 있다. 장기간 그 기능을 유지해야하는 옹벽의 경우는 유지관리가 더욱더 중요한 과제이다. 따라서 본 연구에서는 돌망태 옹벽의 시공 및 유지관리 점검에 대한 방안을 사례분석을 통하여 제안하고자 한다.

• Journal of Advanced Marine Engineering and Technology
• /
• v.41 no.1
• /
• pp.50-55
• /
• 2017

Foamed aluminum is an eco-friendly material that is reusable and safe against fire. These superior characteristics have many advantages in the field of building and construction and in cruise ships as sound absorbers. So far, the research on foamed aluminum has been focused on the sound absorption performance using the foaming ratio. Foamed aluminum, when compared with the existing sound absorbers such as glass wool or rock wool, has a better structural performance, and it can be installed on walls in many different ways. This study conducted experiments on the sound absorption characteristics considering the various applications of foamed aluminum. The effects of painting surfaces with the finishing material were compared to that of the normal surface, and the effects of vertical installation and hanging from the ceiling was compared with the effects of installing on the floor.

• Proceedings of the KSR Conference
• /
• 2010.06a
• /
• pp.880-894
• /
• 2010

The Grout injected precast pile is widely used in rapid-transit railway bridge recently. The existing portland cement of well used filling at injected precast method that with low strength and environmental pollution, unstable in which ground water contamination by cement flow out, ground relaxation by water down, decrease of horizontality resistance and durability and load transfer divide etc. In particular, as in rapid-transit railway bridge need to secure safety from different angle with vibration of high speed train, horizontal force when train stop and earthquake. Works of foundation construction consider to requirements of the times to coal yard green growth. Together, new green foundation method for possible economics and securing of reduce the term of works are material to developments. Therefore, we carried out study that it is using and development new concept environment - friendly filling include durability and earthquake resistance, for secure safety and minimize environment pollution. To achieve this, we carried out difference tests that new green fillings of underwater concrete, high liquidity, high viscosity, early stiffness as compared to existing portland cement fillings. As results, new green filling have outstanding application at precast pile method and micropile construction method with vertical bearing capacity, horizontal bearing capacity and many case. From now on we will be looking forward to development of new environment-friendly foundation method from various further studies.

• Journal of the Society of Disaster Information
• /
• v.19 no.4
• /
• pp.747-756
• /
• 2023

Purpose: In this study, a grout material mixed using non-alkaline silica-based materials, which is an eco-friendly injection material to stabilize ground, is investigated to improve conventional problems. Method: The homogel specimens of Eco-Friendly Non-Alkaline Silica Sol (ENASS) and L.W. and S.G.R., representative silicate grouting are manufactured. Physicochemical and engineering properties of the specimens are evaluated in laboratory with uniaxial compression strength, hydraulic conductivity, shrinkage, chemical resistance, elution, fish poison, waste leaching. Result: Laboratory test results show that the ENASS was superior in all aspects compared to the existing injection matirial. The suitability of the grout material with ENASS is investigated with filed tests. Conclusion: The results of laboratory and field tests demonstrates that the grout material with ENASS is eco-friendly material that increases the strength, decreases the permeability, and discharges pollutants without leaching.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2021.05a
• /
• pp.138-139
• /
• 2021

The MiDF Cement Composite is a high-performance construction material with low defects that dehydrates surplus water through pressurization and minimizes air gap between particles. In other words, the performance expression of the MiDF cement complex is affected by pressurized conditions. Thus, this study analyzed the physical characteristics of MiDF cement complex according to the power and pressure of the ga-power and the time of application and intends to use it as a basic data for optimal mixing.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2022.11a
• /
• pp.87-88
• /
• 2022

The use of converter slag as an aggregate for concrete is limited due to the risk of expansion. This study analyzed the substances causing the expansion of converter slag and evaluated the possibility of its use as an aggregate for concrete through separation and selection. As a result of the experiment, it was confirmed that CaO and MgO were concentrated in the slag particles inducing expansion, and it was confirmed that it was possible to separate them from non-expanded particles through magnetic.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2023.05a
• /
• pp.199-200
• /
• 2023

This paper presents a study on the selection of optimal mix proportions for producing lightweight pre-foam concrete as a substitute for Autoclaved Lightweight Concrete (ALC) without the accelerated curing. The study was conducted using a rapid hardening binder made from by-products of the steel industry as the primary raw material. The experimental results established the optimal mix proportions, which included retarder content, water/binder ratio, foam content, and fiber inclusion amount, for the production of lightweight foam concrete. The optimal mix proportion was determined to have a retarder content at the minimum amount required to secure the working time, W/B of 35%, a foam content limited to 65% or less, and a fiber inclusion amount of 0.05% or less.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2010.05a
• /
• pp.45-49
• /
• 2010

The contamination(stain phenomenon) of natural marble(sipeol, bianko) of art wall of on-site interior finishing system and wall of elevator hall has occurred. The bottom of the art wall of stone junction tile has defects as cracks. To solve these problems, our research team developed eco-friendly complex stone panel(stone 4T + cement board 6T) and high-frequency hot-melt construction method that can construct in winter.