• Title/Summary/Keyword: Change of Building Use

Search Result 465, Processing Time 0.028 seconds

Development of Cost Management Process during Design Phase based on Design to Cost (DTC(Design to Cost)기반의 설계단계 사업비관리 프로세스 개발)

  • Park, So-Hyun;Moon, Hyun-Seok;Hyun, Chang-Teak
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2009.11a
    • /
    • pp.209-212
    • /
    • 2009
  • The Development of Cost Management is embossed efficiently to use the budget for the construction industry. The government is exploring every efforts and polices to control increasing the budget for the construction industry. However, despite of the government's efforts, researches are insufficient for a cost management of development. Also, the changed cost of construction by frequent plan change is caused of decline in quality etc during an accomplishing project. Therefore, in this study, analyzed about principal official phase of design phase to solve the problem. In order to define clearly the target cost concepts in the planning phase apply to the DTC(Design To Cost) concept and technique at the development of cost management process which will be able to manage the enterprise expense. It's process is expected with the fact that will be the possibility efficiently of fixing target cost in the planning phase by the construction client and designer.

  • PDF

One-way ANOVA Analysis to Verify the Effect of Hybrid Strength Estimators by Number of Measurements (일원분석을 통한 하이브리드 추정계의 측정횟수별 영향검증)

  • Han, Soo-Hwan;Hu, Yun-Yao;Kim, Su-Ho;Lim, Gun-Su;Kim, Jong;Han, Min-Cheol
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2022.04a
    • /
    • pp.37-38
    • /
    • 2022
  • This study is attempted to propose an appropriate number of measurements by checking and statistically analyzing the change in hardness according to the number of measurements. As a result, there was no significant difference between the 20th and 30th data, and in the 10th case, the effect on errors occurring during measurement was found to be dominant. Therefore, as the number of measurements, proposing 20 times in consideration of the convenience of use. In addition, in order to minimize the effect on the measurement error, it is proposed to remeasure the surface mane of the measurement surface and the test value in which the error occurs on the average of the test values.

  • PDF

The Effect of PC-Based SP on Rheology and Strength of High Strength Grout (PC계 유동화제가 고강도 그라우트에 유동성 및 강도에 미치는 영향)

  • Kim, Beomhwi;Yi, Chongku
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2022.04a
    • /
    • pp.148-149
    • /
    • 2022
  • The use of high-strength grout applied for facility foundations and bridges has recently been expanding in offshore wind farm. Wind farm in offshore require bearing capacity for horizontal loads such as wind, waves, and earthquakes. In order to improve the bearing force of the base part, sufficient fluidity and a certain strength should be ensured so that the high-strength grout is densely charged in the narrow space of the connection part. Therefore, in this study, changes in fluidity and strength according to the ratio of PC-based superplasticizer mixed in high-strength grout were measured. As a result, as the ratio of the superplasticizer increased, fluidity increased and strength decreased. However, the strength did not decrease when the ratio of superplasticizer was above a 0.005. Therefore, it was confirmed that the fluidity change was remarkable when a 0.005 ratio of PC-based superplasticizer were added.

  • PDF

The Performance Evaluation of Mortar Using Calcium Nitrite and CO2 Nano-Bubble Water (아질산칼슘과 탄산나노버블수를 사용한 모르타르의 성능 평가)

  • Kim, Ho-jin;Kim, Jin-Sung;Choi, Hyeong-Gil
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2020.11a
    • /
    • pp.145-146
    • /
    • 2020
  • This study investigated the performance evaluation of polymer cement mortar for repairing concrete structures using calcium nitrite(Ca(NO2)2) and CO2 nano-bubble mixing water to develop section-restoration methods for the repair and reinforcement of cracks. The evaluation items were strength and microstructure analysis at 28 days of age according to the change in the amount of calcium nitrite and the use of CO2 nano-bubble water. As a result of the experiment, it was confirmed that the performance of polymer cement mortar for repairing concrete structures was improved by the generation of nitrite-based hydration products when calcium nitrite and CO2 nano-bubble water were used.

  • PDF

Physical Properties of Concrete According to Changing in The Types of Premix Cements and the Mixing Rate of CGS. (프리믹스 시멘트 종류 변화 및 CGS 치환에 따른 콘크리트의 물리적 특성)

  • Kim, Su-Hoo;Han, Soo-Hwan;Lim, Gun-Su;Hyun, Seung-Yong;Kim, Jong;Han, Min-Cheol
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2021.11a
    • /
    • pp.63-64
    • /
    • 2021
  • In this study, Coal gasification slag(CGS) was replaced with fine aggregate to verify the physical properties of the concrete according to the change in cement types. As a result of the study, the use of CGS resulted in a decrease of superplasticizer and an decrease of AE agent. In addition, when 50% of mixed cement and CGS were replaced, the initial strength expression was delayed, and the strength enhancing effect was judged to be weak.

  • PDF

Mechanical properties of the mortar by replacing the fine aggregate in mud flat with cement mortar (시멘트 모르타르에서 잔골재를 갯벌로 대체한 모르타르의 특성)

  • Kang, Yun-Young;Lee, Seul-Bi;Yang, Seong-Hwan
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2016.10a
    • /
    • pp.87-88
    • /
    • 2016
  • In the current construction market usage cement and aggregate is increasing continuously. This is progressing serious environmental pollution due to the carbon dioxide generated during cement production. Further, by using a large amount of aggregate, they tend to have even reduced natural resources. As a result, the reduction of carbon dioxide through the United Nations Framework Convention on Climate Change, the energy saving has been positioned as a global trend. Therefore, in this study, instead of fine aggregate fix the cement, by the use to increase the proportion of the tidal flats, to try to reduce the amount of cement and fine aggregate. Accordingly, according to increasing the proportion of the mud flat be analyzed for properties the compressive strength, tensile strength, flow, chloride test, workability of the mortar.

  • PDF

Property of Strength Development on the Concrete with Coarse Particle Cement (굵은 입자 시멘트를 사용한 콘크리트의 강도발현 특성)

  • Noh, Sang-Kyun;Son, Ho-Jung;Baek, Dae-Hyun;Chung, Woung-Sun;Han, Min-Cheol;Han, Cheon-Goo
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2011.05a
    • /
    • pp.89-91
    • /
    • 2011
  • This paper is to investigate experimentally the property of strength development on the concrete for 5 years according to the change of a replacement rate of coarse particle cement in order to use coarse particle cement with a fineness of 1 900 ㎠/g that is classified during a grinding process of the OPC production. The result is that as the CC replacement rate increased, the compressive strength was decreased proportionally. but the width of strength reduction was reduced as time passed.

  • PDF

Synthesis and Characteristics of Different Ratio of Stearic Acid with SiO2 Shell Through Sol-Gel Process (Sol-gel 공정을 통한 SiO2 쉘과의 상이한 스테아산 비율의 합성 및 특성)

  • Ishak, Shafiq;Lee, Han-Seung
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2020.06a
    • /
    • pp.66-67
    • /
    • 2020
  • The synthesis of stearic acid composite phase change material (PCM) was investigated and the samples produced were characterized for use in latent heat storage, using a simple chemical sol-gel process. The PCM was encapsulated to tetraethyl orthosilicate by various preparation ratios of stearic acid (5, 10, 15, 20, 30 and 50%). Fourier transformation infrared spectroscope (FT-IR) and X-Ray diffraction (XRD) were performed to determine the chemical structure and crystalloid phase of the microencapsulated PCM. SATEOS1 (5%) shows the best proportion for the PCM. With the presence of stearic acid as core materials and SiO2 as the supporting materials, it does not show any chemical reaction between both of them. SATEOS1 shows promising potential for thermal energy storage as it shows a better encapsulation efficiency and good thermal stability.

  • PDF

An Experimental Study on the Water Repellent Property of Mortar Applied Water Repellent Agent of Inorganic Polymer Type (무기질 폴리머계 흡수방지재를 도포한 모르터의 발수성능 평가에 관한 실험적 연구)

  • 이일형;엄덕준;오상근
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2004.05a
    • /
    • pp.33-37
    • /
    • 2004
  • Recently, Growing tendency for structure surface to use water repellent agent has increased steadily. But investigation of it's protection and durability property is not sufficient. Therefore, this paper shows the investigation about repellent property and micro structure's change in surface layer of mortar that is applied by water repellent agent. Water repellent property, absorption coefficient, air permeability, porosity and observation of micro construct was investigated according to water repellent agent type. The test results indicated that mortar applied water repellent agent appears tiny absorption coefficient, but air permeability is maintained. The reason is because silane solution is coating at capillary surface of a wall and minute pore structure is changeless.

  • PDF

The Dynamic Properties of the Artificial Stone According to the Mixed Ratio Change of the Inorganic Composite and Waste Porcelain (폐자기와 3성분계 무기결합재의 혼합비율 변화에 따른 인조석재의 역학적 특성)

  • Yoo, Yong Jin;Bae, Sang Woo;Lee, Sang Soo;Song, Ha Young
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2012.11a
    • /
    • pp.95-96
    • /
    • 2012
  • This study makes with the environment-friendly artificial stone which doesn't use the cement and natural aggregate and increases the blast furnace slag that is the eco-friendly material that is the industrial byproduct, fly ash, and availability of the red mud and applies the coares aggregate substitute material as the cleistothecium. The experimental plan according to it indicated the compressive strength and flexural strength which is the most excellent in the mixied ratio 40% of the result degree of closeness magnetism of experimenting with the optimal mix obtained through the preceding stude.

  • PDF