• Title, Summary, Keyword: filler aggregates

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Study on Porous Concrete According to Filler (채움재 종류에 따른 투수콘크리트 성능 연구)

  • Lho, Byeong-Choul;Choi, Kyu-Hyung;Kim, Jeong-Hoon;Cha, Kwang-Ill
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.741-744
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    • 2006
  • The study focuses on the mixture of materials for the development of porous concrete with unsaturated polyester resin. The materials used in the mixture include the coarse aggregates unsaturated polyester resin as binder, calcium carbonate and sand as a filler. An experimental procedure has been carried out to select the best combination of the materials that satisfy both the required permeability and compressive strength.

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Characteristics of Sulfuric acid corrosion of Recycled PET Polymer Concrete with Different Filler (충전재 변화에 따른 PET 재활용 폴리머 콘크리트의 황산 부식에 관한 특성)

  • Jo Byung Wan;Gu Ja Kap;Park Jong Hwa;Park Seung Kook
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.719-722
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    • 2004
  • Resins using recycled PET offer the possibility of a lower source cost of materials for making useful polymer concrete products. The purposed of this paper is to form a part of reducing the damage of sulfuric acid, through investigating recycled PET polymer concrete, . immersed at sulfuric acid solution for 84 days. Recycled PET PC is excellent chemical resistance, resulting in the role of unsaturated polyester resin which consists of polymer chain structure accomplishes bond of aggregates and filler strongly. Also, Recycled PET PC, used fly-ash as filler, is stronger resistance of sulfuric acid corrosion than $CaCO_3$, because it is composed of $SiO_2$ and very strong glassy crystal structure. Therefore, Recycled PET PC, used fly-ash as filler, is available under corrosion circumstances like sewer pipe or waste disposal plant.

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Increasing the Strength with Earth and Soil through Optimum Micro-filler Effect and Lime Composite Addition (흙과 모래의 최밀충전효과와 석회복합체의 첨가에 따른 강도 증진)

  • Hwang, Hey-Zoo;Roh, Tae-Hak;Kang, Nam-Yi
    • KIEAE Journal
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    • v.11 no.4
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    • pp.95-101
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    • 2011
  • Earth has been used as a building material not only our country but also many foreign countries in the world. In foreign countries, we can often find the high-storied earthen houses which have been maintained for over several hundred years, which means the fact that earth differs in durability according to the methods of utilizing earth. So, the purpose of this study is to progress the fundamental research for utilizing earth as a wall material. Also, the another purpose of this study is to utilize the optimum micro-filler effect which adjusts the grain size of earth and the lime composite which promotes chemical combining power, and so examine whether earth material ensures its high compressive strength. This study applied both of rammed earth method and pour earth method among earth architecture methods. This study investigated compressive strength, slump, and air content according to unit binder weight. On the basis of such experimental results, this study derived the following conclusions. 1) Optimum micro-filler mixtures reduce a lot of fine particles contained in earth. If optimum micro-filler mixtures are used as aggregates, they develop lower W/B and relatively higher strength than general earth. 2) In this study, which uses optimum micro-filler earth mixtures and lime composite, rammed earth method develops 29MPa and pour earth method develops 28MPa in 28 days compressive strength. Such strengths can be utilized in building walls.

Influence of Inorganic Filler on Properties of EPDM Compounds (무기 충전제가 EPDM 배합물의 특성에 미치는 영향)

  • Choi, Sung-Seen;Kim, Ok-Bae
    • Elastomers and Composites
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    • v.46 no.2
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    • pp.138-143
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    • 2011
  • EPDM compounds and vulcanizates containing inorganic filler such as talc, calcium carbonate, or clay as well as carbon black were prepared, and the influence of inorganic filler on properties of the EPDM compounds and vulcanizates were investigated. The bound rubber contents did not significantly increase even though the inorganic filler was added. There were big aggregates in the EPDM samples with high loading inorganic filler. By adding the inorganic filler, the cure times tended to increase and the delta torque decreased. The modulus were on the whole decreased, whereas the elongation at break, tensile strength, and tear strength were increased by adding the inorganic filler. The decreased modulus and increased elongation at break can be explained with the decreased delta torque, the increases of tensile strength and tear strength can be explained with the increased elongation at break. By adding the inorganic filler, level of reinforcing in the EPDM compounds did not increase and the crosslink density decreased.

Physical Properties of Polymer Mortar Recycling Waste Concrete Powder as a Filler (폐콘크리트 미분말을 충전재로 재활용한 폴리머 모르타르의 물성)

  • Hwang, Eui-Hwan;Choi, Jae-Jin;Hwang, Taek-Sung
    • Applied Chemistry for Engineering
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    • v.16 no.3
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    • pp.317-322
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    • 2005
  • Nowadays, recycling of aggregates from the waste concrete is in big demand due to the protection of environment and the shortage of aggregates that are needed for ever expanding construction projects. This study was undertaken to examine the feasibility of recycling waste concrete powder produced in the crushing process of demolished concrete as a filler material for polymer mortar. In this study, polymer mortar specimens were prepared by varying the mix proportion of polymer binder (ranging 9~15 wt%), waste concrete powder (ranging 0~20 wt%) substituted for silica powder, 0.1~0.3 mm fine aggregate (ranging 21~24 wt%) and 0.7~1.2 mm fine aggregate (ranging 44~47 wt%). For the prepared polymer mortar specimens, various physical properties such as strength, water absorption, heat water resistance, acid resistance, pore distribution and SEM observation were investigated in this work. As a result, physical properties of polymer mortar were observed to have remarkably improved with an increase of polymer binder, but greatly deteriorated with an increase of substitution quantity of waste concrete powder.

Acid Resistance of Unsaturated Polyester Mortar Using Crushed Wate Glass (폐유리를 골재로 사용한 불포화폴리에스테르 모르타르의 내산성에 관한 연구)

  • 한창호;최길섭;김완기;조영국;소양섭
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.339-342
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    • 2000
  • Recently, the importance of the conutermeasures for waste materials has pointed out. Waste glass is also one to waste materials used for the recycling in construction sites. The crushed waste glass has been used to make a glass polymer composite that can be applied for sewer, storm drain pipe and interlocking block, etc. In this study, the crushed waste glass is explored with the possibility of recycling it, as a substitute for fine aggregates. The prepose of this investigation is to improve the strengths and acid resistance of the UP mortars using crushed waste glass. The UP mortars are prepare with blast furnace slag fly ash filler. the UP-fine aggregate ratios the crushed waste glass replacements for fine aggregate are tested strengths before and after immersion(H (아래첨자2)SO(아래첨자4) 10%), weight change and acid resistance are also tested. From the test results, the relative strength or UP mortars using fly ash as filler are found to be somewhat superior to that of the UP mortars using blast furnace as filler, And a UP mortar with fly ash as a filler, a UP-fine aggregate ratio of 15% and a waste glass replacement if 50% for fine aggregate is recommended as optimal mix proportion of UP mortar using crushed waste glass. Accordingly, it is enough to assure the use of the crushed waare glass as an aggregate for the production of UP mortar.

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A Study on the Applicability of Heavyweight Waste Glass and Steel Slag as Aggregate in Heavyweight Concrete (고밀도 폐유리와 제강슬래그의 중량 콘크리트 골재로의 적용성에 관한 연구)

  • Choi, So-Yeong;Kim, Il-Sun;Choi, Yoon-Suk;Yang, Eun-Ik
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.23 no.2
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    • pp.107-115
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    • 2019
  • The many countries are facing the shortage of natural resources, and the supply of aggregates are being exhausted. To consider this situation a variety of studies were performed for the development of alternative resources. In particular, high density filler material was used for shielding radioactive waste, large amount of natural aggregates are required in order to produce filler material. Also, in order to improve the shielding performance of filler material, it is required to increase the density of the filler material. Therefore, in this study was carried out to provide basic data for expanding the feasibility of high density industrial waste resource as aggregate in heavyweight concrete. From the test results, OPC case, concrete strength decreased by using heavyweight waste glass as fine aggregate, however, it is improved by using mineral admixture as binder. Therefore, when the heavyweight waste glass and steel slag are applied to heavyweight concrete, it is desirable to use mineral admixture, especially to use BFS than FA. Meanwhile, when the steel slag was replaced as coarse aggregate of heavyweight concrete, elasticity of modulus and radiation shielding performance can be improved owing to high density of steel slag.

Structure Analyses of Rubber/Filler System under Shear Flow by Using Time Resolved USAXS Method

  • Nishitsuji, Shotaro;Takenaka, Mikihito;Amino, Naoya;Ishikawa, Yasuhiro
    • Elastomers and Composites
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    • v.54 no.2
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    • pp.156-160
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    • 2019
  • The changes in the dispersion of carbon black in liquid polyisoprene under shear flow with time have been investigated by time-resolved ultra small-angle X-ray scattering (USAXS) method. The analyses of USAXS profile immediately after the start of shear flow clarified that the aggregates of carbon black with a mean radius of gyration of 14 nm and surface fractal dimension of 2.5 form the fractal network structure with mass-fractal dimension of 2.9. After the application of the shear flow, the scattering intensity increases with time at the observed whole entire q region, and then the a shoulder appears at $q=0.005nm^{-1}$, indicating that the agglomerate is broken and becomes smaller by shear flow. The analysis by the Unified Guinier/Power-law approach yielded several characteristic parameters, such as the sizes of aggregate and agglomerate, mass-fractal dimension of agglomerate, and surface fractal dimension of the primary particle. While the mean radius of gyration of the agglomerate decreases with time, the mean radius of gyration of the aggregate, mass fractal dimension, and surface fractal dimension don't change with time, indicating that the aggregates peel off the surface of the agglomerate.

Strength Characteristics on Sulfuric Acid Corrosion of Recycled PET Polymer Concrete with Different Fillers (충전재 종류에 따른 PET재활용 폴리머콘크리트의 황산부식에 대한 강도 특성)

  • Jo Byung-Wan;Shin Kyung-Chul;Park Seung-Kook
    • Journal of the Korea Concrete Institute
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    • v.17 no.4
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    • pp.499-504
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    • 2005
  • Polymer concrete shows excellent mechanical properties and chemical resistance compared with conventional normal cement concrete. The polymer concrete Is drawing a strong interest as high-performance materials in the construction industry Resins using recycled PET offer the possibility of a lower source cost of materials for making useful polymer concrete products. Also the recycling of PET in polymer concrete would help solve some of the solid waste problems Posed by plastics and save energy. An objective of this paper is to estimate the damage of sulfuric acid, through investigating recycled PET polymer concrete, immersed at sulfuric acid solution for 84 days. As a result of testing, recycled PET PC, used $CaCO_3$ as filler, makes a problem of appearance and strength if they are exposed for long term at corrosion environment. On the other hand, recycled PET PC, used fly-ash as filler, had less effect on decrease in weight and strength. Recycled PET PC is excellent chemical resistance, resulting in the role of unsaturated polyester resin which consists of polymer chain structure accomplishes bond of aggregates and filler strongly. Also, recycled PET PC, used fly-ash as filler, is stronger resistance of sulfuric acid corrosion than $CaCO_3$, because it is composed of $SiO_2$ and very strong glassy crystal structure. Therefore, recycled PET PC, used fly-ash as filler, is available under corrosion circumstances like sewer pipe or waste disposal plant.

Properties of SBR Compound using Silica-graphite Dual Phase Filler (실리카-그라파이트 이원 충진제를 이용한 SBR 컴파운드의 성질)

  • Shin, Ji Hang;Shanmugharaj, A.M.;Lee, Pyoung Chan;Jeoung, Sun Kyung;Ryu, Sung Hun
    • Elastomers and Composites
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    • v.49 no.1
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    • pp.66-72
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    • 2014
  • Carbon coating on silica particles is done by grafting expanded graphite on the silica aggregates. Successful coating of carbon is corroborated using FT-IR, TGA, XPS and TEM. Crystalline nature of coated graphite is corroborated using XRD. Influence of carbon coated silica particles on rheometric and mechanical properties of SBR composites are investigated. Carbon coated silica particles showed significant improvement in rheometric and mechanical properties, when compared to pristine silica filled system corroborating higher polymer-filler adhesion. This fact was further supported by bound rubber content and equilibrium swelling ratios of unvulcanized and vulcanized SBR composites.