• Title, Summary, Keyword: Waste Concrete

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Application of various types of recycled waste materials in concrete constructions

  • Hosseini, Seyed Azim
    • Advances in concrete construction
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    • v.9 no.5
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    • pp.479-489
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    • 2020
  • Studies have proved that the mechanical properties of concrete, suddenly is dropped off with employing waste materials as replacements. The effectiveness of fibre addition on the structural stability of concrete has been indicated in recent investigations. There are different waste aggregates and fibres as plastic, rubber tire, coconut, and other natural wastes, which have been evaluated throughout the last decades. The fibres incorporation has a substantial effect on the properties of concrete mix subjected to different loading scenarios. This paper has reviewed different types of wastes and the effect of typical fibres including Poly Ethylene Terephthalate (PET), rubber tire, and waste glass. Furthermore, waste plastic and waste rubber has been especially studied in this review. Although concretes containing PET fibre revealed a reduction in compressive strength at low fibre fractions, using PET is resulted to micro-cracking decrement and increasing flexibility and flexural strength. Finally, according to the reviews, the conventional waste fibres are well-suited to mitigated time-induced damages of concrete and waste fibres and aggregates could be a reliable replacement for concrete.

An Experimental Study on Properties of Light-Weight Foamed Concrete Using the Waste Concrete Powder (폐콘크리트 미분을 사용한 경량기포콘크리트의 특성에 관한 실험적 연구)

  • Choi, Hun-Gug;Kim, Jae-Won;Seo, Jung-Pil;Lee, Jung-Goo;Kang, Cheol;Kim, Jin-Man
    • Proceedings of the Korean Institute of Building Construction Conference
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    • pp.75-78
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    • 2007
  • The recycling program about waste concrete is being progressed to national research. But research on waste concrete powder which is occurred in control process of concrete powder is not enough. Waste concrete powder includes in $SiO_2,\;Al_2O_3$, and CaO so that the create of tobermorite is possibile through Hydrothermal Syntesis Reaction. Tobermorite have an advantage of high strength, sulphuric acid resistance and the lower drying shrinkage. Accordingly, this study investigate in properties of light-weight foamed concrete made with waste concrete powder. As a results, light-weight foamed concrete made with waste concrete powder is the higher than stone powder sludge of density and porosity, and the tower compressive strength. Therefore, it is thought that light-weight foamed concrete using waste concrete powder is possible.

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An Experimental Study on the Freeze-Thaw Resistance of Concrete Incorporating Waste Foundry Sand (폐주물사를 혼입한 콘크리트의 동결-융해 저항성에 관한 실험적 연구)

  • Yong, Suk-Ung;Lee, Joo-Hyung;Hong, Chang-Woo;Yun, Kyong-Ku;Park, Je-Seon
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.117-122
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    • 1998
  • Concrete structures has been deteriorated by the freezing and thawing due to temperature gap. This study was conducted to evaluate durabilite of concrete which are increasingly demanded recently. Therefore the research of durability must be executed for application of waste foundry sand concrete real structures. Concrete durability must be executed for application of waste foundry sand concrete real structures. Concrete durability properties incorporating waste foundry sand was performed with the variable of W/C ratio, Sand/Waste foundry sand ratio and Air entrainment-Non air entrainment. Cylinder specimens were made and subjected to freezing and thawing cycle at $-18^{\cire}C$ and $4^{\cire}C$. Dynamic modulus of elasticity were evaluated as F/T cycle increase. The results show that strength of concrete is increased the W/C ratio decrease, the Sand/Waste foundry sand ratio increase when the concrete contains AE agent and decreasing WC ratio and AE concrete makes improved resistance of freezing and thawing improved. Especially, resistance of freezing and thawing is improved by Fine aggregate/Waste foundry sand ratio which is 50%, 25%, 0% in a row. Therefore it is turn out the waste foundry sand could be applied to concrete from the experiment.

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Strength of concrete for PHC pile Replacing the silica to Waste Concrete Powder (규사를 폐콘크리트 미분말로 대체한 PHC 파일용 콘크리트의 강도특성)

  • Seo, Eun-Seok;Jung, Ui-In;Kim, Bong-Joo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • pp.9-10
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    • 2015
  • Waste Concrete Powder will be generated during the manufacture of construction waste as recycled aggregate Waste concrete. The main component of the waste concrete Powder is a silica-based composition 51% SiO2, waste concrete cement-based composition Al2O3 10%, CaO 26% component are contained. The material is silica sand of PHC piles should experiment by replacing the Waste Concrete Powder. The compressive strength results are as follows. 25% when the Silica was replaced 32.5Mpa, when 50% have replaced 43.4Mpa, when 75% have replaced 45.3Mpa was measured. Compared with the non-replaced test sample it appears that the strength increases. Therefore, it is determined that the practical use of the PHC piles by replacing silica via this experiment is possible.

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A Study on Application of Waste Sand as Concrete Fine Aggregate (콘크리트용 잔골재로서 폐기물 모래의 적용성에 관한 연구)

  • 윤장길;김효열;임남기
    • Proceedings of the Korean Institute of Building Construction Conference
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    • pp.15-20
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    • 2004
  • To the development on reusing method of the heat-source waste at Daegu Bisan dyeing-complex, this study is aimed to application of it's crushing material (hereafter waste sand) as concrete fine aggregate. The results are as follows; 1. Flow and unit weight of mortar using waste sand as concrete fine aggregate are decreased. 2. At the results of compressive strength test and bending strength test, mortar using waste sand superior to plain mortar within 80% substitute ratio of waste sand. Because increasing rate of compressive strength is similar through increasing age, waste sand performs as filler's function of no-effect with cement only. 3. At the results of concrete application test, unit weight of concrete using waste sand is similar to plain concrete and compressive strength of concrete is superior to plain likewise the results of mortar test

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An Engineering Properties of Concrete Containing Waste Glass (폐유리를 혼입한 콘크리트의 공학적 특성)

  • 라재웅;신재인;오성진;구봉근
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.138-143
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    • 2000
  • In this paper, we carried out experiment to use crushed waste glass as a fine aggregate. This study delt with the comparative analysis on the construction works and engineering properties of concrete containing crushed waste glass through physical experiment. The experimental variables are crushed waste glass substitution ratio and W/C(38, 53%). When the W/C was 38%, we could know that concrete containing crushed waste glass was good as general concrete on the construction works and engineering properties but the concrete containing crushed waste glass applied W/C 53% was not good as general concrete on those. Therefore, concrete containing crushed waste glass applied W/C 53% should use admixture on the site.

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An Experimental Study on Physical and Mechanical Properties of Steel Fiber Reinforced Concrete Containing Waste Glass (폐유리를 혼입한 강섬유보강 콘크리트의 물리ㆍ역학적 특성에 관한 실험적 연구)

  • 박승범;이봉춘;조광연;이택우
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.903-908
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    • 2002
  • The production of waste glasses has been increased with the development of industry. The utilization of waste glass for concrete can cause the concrete to be cracked and to be weakened due to an expansion by alkali-silica reaction(ASR). When used the fibers with waste glass, there is an effect on reduction of expansion and strength loss due to ASR between the alkali in the cement paste and the silica in the waste glass. In this study, we conducted basic experimental research to analyze the possibilities of recycling of amber waste glass as fine aggregates for steel fiber reinforced concrete. Test results of fresh concrete. slump is decreased because grain shape is angular and air content is increased due to involving small size particles so much in waste glasses. Also. tensile and flexural strengths increased as the content of steel fibers increased. In conclusion, the content of waste glass below 40% is reasonable and usage of pertinent admixture is necessary to obtain workability or air content.

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The Study on Application of a Heat annexation power plant Source Waste Aggregate as Concrete Aggregate (열병합발전소의 열원폐자재를 골재로 활용한 콘크리트특성에 관한 연구)

  • Lee Myoung-Hyol;Kim Hyo-Youl;Lim Nam-Gi
    • Proceedings of the Korean Institute of Building Construction Conference
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    • pp.99-104
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    • 2005
  • This study is as a part of the new disposal and recycling plans of heat-resource waste of Daegu dyeing, industrial center we tried to examine applicable possibility of crushed thing(waste aggregate) as aggregates for mortar and concrete. To examine applicable possibility of waste aggregate as a lightweight-aggregate for concrete and mortar, we carried this study by mainly property examination of concrete according to replacement ratio of waste aggregate. We carried slump, unit weight, compressive strength and bending strength test according to replacement ratio of waste aggregate. As the result of that, if we use waste aggregate, lightweight of concrete and mortar will be possible. Specially it shows a strength improvement effect of cement hardening according to using this so it is judged that applicable possibility as aggregate for concrete and mortar is very excellent.

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A Study on Application of Dyeing Industrial Heat Source Waste Aggregate as Concrete Aggregate (콘크리트용 굵은 골재로서 염색공단 열원 폐재의 적용성에 관한 연구)

  • Youn, Jang-Kil;Kim, Hyo-Youl;Lim, Nam-Gi
    • Journal of the Korea Institute of Building Construction
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    • v.5 no.1
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    • pp.123-129
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    • 2005
  • This study is as a part of the new disposal and recycling plans of heat-resource waste of Daegu dyeing industrial center we tried to examine applicable possibility of crushed thing(waste aggregate) as aggregates for mortar and concrete. To examine applicable possibility of waste aggregate as a lightweight-aggregate for concrete and mortar, we carried this study by mainly property examination of concrete according to replacement ratio of waste aggregate. We carried slump, unit weight, compressive strength and bending strength test according to replacement ratio of waste aggregate. As the result of that, if we use waste aggregate, lightweight of concrete and mortar will be possible. Specially it shows a strength improvement effect of cement hardening according to using this so it is judged that applicable possibility as aggregate for concrete and mortar is very excellent.

Feasibility Study of Fiber Reinforced Concrete Using Waste Fishing Net (폐어망을 이용한 섬유보강 콘트리트의 적용성 연구)

  • Kweon, Gichul;Kim, Heeyun
    • International Journal of Highway Engineering
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    • v.16 no.6
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    • pp.87-93
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    • 2014
  • PURPOSES : To evaluate the feasibility of cut waste fishing net as a reinforced fiber for concrete. METHODS : Strength characteristics of fiber reinforced concrete using waste fishing net were investigated. The cut waste fishing nets with 4~5cm length were putted into the soil-cement and cement concrete for pavement slab. RESULTS : Compression and tensile strength of fiber reinforced concrete using waste fishing net were increased. CONCLUSIONS : It was concluded that cut waste fishing net can be used as a reinforced fiber for cement concrete. However, sometimes using cut waste fishing net leads to decrease the strength; therefore, further researches are needed for real project.