WO2009096359A1 - 重量コンクリート - Google Patents
重量コンクリート Download PDFInfo
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- WO2009096359A1 WO2009096359A1 PCT/JP2009/051192 JP2009051192W WO2009096359A1 WO 2009096359 A1 WO2009096359 A1 WO 2009096359A1 JP 2009051192 W JP2009051192 W JP 2009051192W WO 2009096359 A1 WO2009096359 A1 WO 2009096359A1
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- heavy
- aggregate
- concrete
- cement
- heavy concrete
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/02—Selection of uniform shielding materials
- G21F1/04—Concretes; Other hydraulic hardening materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/0031—Heavy materials, e.g. concrete used as ballast material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Definitions
- the present invention relates to heavy concrete used for wave-dissipating blocks, radiation blocking walls, and the like, and particularly to heavy concrete that exhibits high fluidity without separation of heavy aggregate and cement paste.
- ⁇ Heavy concrete is concrete with larger unit volume mass than usual, and is used for wave-dissipating blocks, concrete for revetments, radiation shielding walls, bridge weights, etc.
- heavy aggregates used for heavy concrete iron ores such as magnetite and hematite have been used in many cases, but it has become difficult to obtain high quality heavy aggregates. It is not preferable from the viewpoint of economy and environmental consideration.
- iron ore aggregates for example, heavy concrete has been proposed in which coarse particles obtained by separating steelmaking converter dust with a sieve are used as fine aggregates (see Patent Document 1).
- the present invention provides a heavyweight concrete that does not require the addition of a thickener such as methylcellulose, has little separation of heavy aggregate and cement paste, has high fluidity and good workability.
- the present invention is heavy concrete obtained by mixing at least cement, heavy aggregate, and water, wherein the heavy fine aggregate includes a hot scarf that is generated in a thermal cutting process of a steel slab surface. It provides heavy concrete.
- fine aggregates passing through a sieve having a nominal size of 0.15 mm have a mass percentage of 10% to 20%, and a spherical shape having a degree of distortion as described below of 3.3 or less.
- the above-mentioned heavy concrete is provided in which the particles are 20% or more of all particles having a particle size of 50 ⁇ m or more and 5 mm or less.
- strain unevenness] [Perimeter of particle outline] / [Diameter of a perfect circle having the same area as the particle outline area]
- the present invention also provides the above-described heavy concrete, wherein the coarse coarse aggregate includes artificial stone produced by melting waste containing dust generated in the steelmaking process.
- the present invention provides a heavy concrete hardened body characterized by curing the heavy concrete described in any of the above.
- the heavy concrete of the present invention can provide high fluidity while suppressing the separation of cement paste and aggregate, which was conventionally considered difficult without adding a large amount of thickener.
- material separation does not occur, and therefore no clogging occurs in the pipe, and a large amount of thickener is not required, so a high pumping pressure is required. Therefore, the workability is improved and the labor and cost for construction can be reduced.
- the filling property to a formwork etc. improves, since it becomes higher density and material separation is suppressed, more uniform heavy concrete can be provided.
- the “heavy concrete” in the present invention may or may not include coarse aggregate. That is, in the present invention, “heavy concrete” is used in a broad concept including “heavy mortar” that does not include coarse aggregate unless otherwise specified. Further, in the present invention, “heavy aggregate” is used in a concept including heavy fine aggregate and heavy coarse aggregate, but when heavy concrete means heavy mortar, it indicates heavy fine aggregate.
- Weight aggregate is aggregate dense than normal bone material, the present invention Omoteinui density and 4.0 g / cm 3 or more aggregates. However, even if an aggregate having a surface dry density of less than 4.0 g / cm 3 is mixed, if the surface dry density of the aggregate is 4.0 g / cm 3 or more, the aggregate is called a heavy aggregate.
- the heavy concrete of the present invention is characterized in that it includes a hot scarf that is generated in the process of cutting a steel slab surface as a heavy fine aggregate.
- Hot scarf is generated in the process of melting and removing inclusions such as Al continuously deposited on the longitudinal surface layer of the steel slab by the molten steel injection flow into the mold when casting the steel slab by the continuous casting slab Since it is a recycled material and iron oxide is a main constituent, it has a surface dry density of 4.8 g / cm 3 or more sufficient for use as a heavy aggregate.
- it is composed of particles of nearly spherical shape or a crushed material or agglomerate thereof having a minimum surface area per volume by melting in a liquid state once in the cutting process and then cooling and solidifying in the air. It accounts for the above. Furthermore, there is no bias in the particle size distribution, and by using a hot scarf as a heavy aggregate, heavy concrete with high fluidity can be obtained while suppressing material separation.
- a hot scarf does not generate much as a recycled material, it is preferable to use it by mixing with other recycled materials.
- the materials used in combination with the hot scarf include coarse particles separated from the steelmaking converter dust by a 50 ⁇ m sieve, granular pig iron separated from the granulated blast furnace slag in the grinding process, mill scale generated in the steelmaking rolling process, etc.
- fine aggregates that pass through a sieve having a nominal size of 0.15 mm are preferably 10% to 20%, particularly preferably 12% to 18% by mass percentage, and spherical particles are present.
- the total particles having a particle size of 50 ⁇ m or more and 5 mm or less in the heavy fine aggregate it is preferably 20% by number or more, more preferably 25% by number or more, and particularly preferably 30% by number or more.
- number% means that 100 particles having an average particle diameter of 50 ⁇ m or more and 5 mm or less are arbitrarily selected by visual observation of a scanning electron microscope (SEM) image, and the number of spherical particles is counted from among them. Find by dividing by the number.
- the “average particle diameter” of the particles, particularly particles that are not spherical particles, is the average value obtained by measuring the passing length of the particles in the SEM image arbitrarily at three points.
- the “spherical particle” refers to a particle having a strain irregularity defined by the following formula of 3.3 or less.
- [Strain unevenness] [Perimeter of particle outline] / [Diameter of a perfect circle having the same area as the particle outline area] That is, by visually observing a scanning electron microscope (SEM) image, particles that can be judged to be discoid or hemispherical from the shadow are excluded, and particles that are clearly close to a sphere are image-processed and analyzed. Image processing may be performed using general image processing software (for example, Adobe Photoshop). First, a contour-only figure is created by removing shadows from an image of particles close to a sphere, and the area of the figure and the perimeter of the outline are obtained.
- SEM scanning electron microscope
- the figure is approximated to a circle (assuming a circle having the same area as the figure), the radius r is obtained from the area ⁇ r 2 of the circle, and the diameter is obtained by doubling the radius r.
- the ratio of the circumference length to the diameter becomes smaller as the contour is closer to a circle, that is, as the particle is closer to a sphere, and becomes a value closer to the circumference ratio ⁇ .
- the weight fine aggregate passing through a sieve having a nominal size of 1.2 mm is preferably 70% to 90% in terms of mass percentage from the viewpoint of exhibiting the above-described effect.
- An example of the optimum particle size distribution of the heavy fine aggregate is shown in Table 1.
- the coarse powder is sieved at 50 ⁇ m, it is preferable to mix up to the volume ratio of the coarse powder converter dust 30 to the hot scarf 70. If more coarse converter dust is mixed, particles passing through a sieve having a nominal size of 0.15 mm may exceed 20% in terms of mass percentage of the total particles, so that sufficient mortar flow may not be obtained. is there.
- the granular pig iron separated from the granulated blast furnace slag in the pulverization process also has a surface dry density of 4.8 g / cm 3 or more, the main component of which is metallic iron, and contains approximately 50% of particles having a nearly spherical shape. Recycled material that can be mixed with scarves. It is preferable to mix up to the volume ratio of the granular pig iron 30 to the hot scarf 70. When more granular pig iron is mixed, particles passing through a sieve having a nominal size of 0.15 mm may not be 10% in terms of mass percentage of all particles, so that a sufficient mortar flow may not be obtained.
- the mill scale 70 it is preferable to mix up to the volume ratio of the mill scale 70 to the hot scarf 30 if the mill scale is a recycled material generated in the steelmaking rolling process.
- the mill scale is mixed more than that, the proportion of spherical particles is less than 20% by number, the fluidity cannot be ensured, and a sufficient mortar flow may not be obtained.
- the heavy coarse aggregate used in the heavy concrete of the present invention conventional iron ore can be used, but the use of expensive natural resources is not preferable from the viewpoint of economy and environmental consideration.
- an electric furnace oxidation slag coarse aggregate can also be used.
- one of the purposes is to use resources that are not sufficiently utilized industrially, and it is preferable to use an artificial stone produced by melting waste containing dust generated in the steelmaking process.
- artificial stone produced by mixing dust generated during steelmaking and powdered reduced slag, heat-melting, cooling and solidifying, free lime and low-boiling-point metal oxides are removed during the melting process.
- a coarse aggregate having a low density such as crushed stone may be mixed with the coarse coarse aggregate.
- various portland cements such as ordinary portland cement, early-strength portland cement, medium heat portland cement, low heat portland cement, various mixed cements such as blast furnace cement and fly ash cement, and eco-cement Etc.
- the heavy concrete of the present invention can be produced by the same method as ordinary concrete. That is, the heavy fine aggregate, the heavy coarse aggregate, and the cement may be mixed, and water may be added and kneaded. If necessary, an admixture such as a water reducing agent or an antifoaming agent may be added. In order to ensure a high density of heavy concrete, it is preferable to reduce the unit water amount, and it is preferable to add a water reducing agent.
- a lignin-based, naphthalenesulfonic acid-based, melamine-based, or polycarboxylic acid-based water reducing agent As the water reducing agent, a lignin-based, naphthalenesulfonic acid-based, melamine-based, or polycarboxylic acid-based water reducing agent, an AE water reducing agent, a high-performance water reducing agent, or a high-performance AE water reducing agent can be used.
- an antifoaming agent may be added.
- the fine aggregate coarse aggregate volume ratio, unit water amount, and water cement ratio can be appropriately selected according to the application.
- blending is performed so that the slump flow becomes 50 to 60 cm and the slump flow becomes 50 cm or more when slumping is 18 cm or more.
- the fine aggregate coarse aggregate volume ratio is 0.4 to 0.8
- the unit water amount is 160 to 200 kg / m 3
- the water cement ratio is 30 to 55%.
- 18 cm or more or a slump flow of 50 to 60 cm can be obtained.
- a high filling property can be obtained by setting the slump to about 8 to 18 cm.
- the fine aggregate coarse aggregate volume ratio is 0.4 to 0.7
- the unit water amount is 140 to 200 kg / m 3
- the water cement ratio is 30 to 55%. 8 to 18 cm can be obtained.
- the heavy concrete of the present invention is heavy mortar, it can be produced by the same method as the heavy concrete containing heavy coarse aggregate described above, except that the heavy coarse aggregate is not mixed. Can be appropriately selected according to the application.
- the unit water amount and the water cement ratio may be increased.
- the unit water amount and the water cement ratio need to be decreased.
- a sufficiently high fluidity and material separation resistance can be obtained with a unit water amount of 220 to 300 kg / m 3 and a water cement ratio of 30 to 60%.
- the heavy concrete filled in the construction site or on the formwork can be cured to obtain a hardened concrete by a curing method such as air curing, wet curing, steam curing and the like, as with normal concrete.
- the heavy concrete of the present invention can be filled without any gaps to the details of the formwork due to its high fluidity, and material separation can be suppressed, so that a high-quality heavy concrete hardened body free from voids and aggregates can be obtained.
- Test material As the cement (hereinafter abbreviated as “C”), ordinary Portland cement manufactured by Taiheiyo Cement was used. As the fine aggregate (hereinafter abbreviated as “S”), those shown in Table 2 were used. As the coarse aggregate (hereinafter abbreviated as “G”), DSM2005 (surface dry density 4.13 g / cm 3 ) manufactured by Daido Technica (sold by Taiheiyo Cement) is used. It was. Further, as an admixture, an AE water reducing agent (BASF Pozzolith Co., Ltd .; Pozoris No.
- AD a high-performance AE water reducing agent
- BASF Pozoris Co., Ltd. is used in the slump flow formulation.
- Rheobuild SP-8SV was used.
- ratio of spherical particles (%) is the above-mentioned “ratio of spherical particles”. That is, it indicates the number% of spherical particles among all particles having a particle diameter of 50 ⁇ m or more and 5 mm or less in the fine aggregate.
- Test 1 (Test method) (1) Each material was mixed by the slump compounding shown in Table 3, and concrete was kneaded. Here, “W” indicates water, and “W / C” indicates “water cement ratio”. “W / C” was 50% by mass ratio. (2) The concrete slump test is based on JIS A 1101, placing a slump cone (upper end inner diameter 100 mm, lower end inner diameter 200 mm, height 300 mm) on a flat flat plate installed horizontally, and filling the slump cone with concrete, Immediately after leveling the upper end, the slump cone was gently lifted vertically, and the drop (decrease in height) was measured in 0.5 cm increments at the center of the concrete to give “slump”.
- Example 1 As shown in Table 3, in the heavy concrete of the present invention (Example 1), a slump of 13.0 cm was obtained, whereas in the heavy concrete manufactured using a conventional heavy fine aggregate with the same composition, magnetite. In Comparative Example 1 using No. 4, the slump was 0.5 cm, and in Comparative Example 2 using the converter dust coarse particles, the slump was 1.0 cm and the fluidity was extremely low. As a result, it was shown that the heavy concrete of the present invention has extremely high fluidity as compared with the conventional heavy concrete.
- Test 2 (Test method) (1) Each material was mixed by the slump flow composition shown in Table 4, and concrete was kneaded. W / C (water cement ratio) was 37% by mass ratio. (2) The concrete slump flow test is based on JIS A 1150. Like the slump test, the concrete is filled in the slump cone, the slump cone is pulled up vertically, and after the concrete stops moving, the diameter that seems to have the largest spread And the diameter of the orthogonal direction was measured. Moreover, the state of material separation at this time was visually observed.
- Table 4 shows the slump flow measurement results and the presence or absence of material separation.
- both the examples and the comparative examples were blended and adjusted so that the slump flow was about 50 cm.
- the unit water amount is 10 kg / m 3
- the paste content (cement) is 27 kg / m 3
- the high-functional AE water reducing agent is 1.4 kg / m 3 in the comparative example 3 compared to the examples.
- Comparative Example 4 0.9 kg / m 3 of much was mixed.
- the aggregate and the cement paste spread without being separated, but in the comparative example, the material was significantly separated, the aggregate remained in the center, and only the cement paste spread.
- Test 3 The concrete kneaded in the slump flow test of test 2 is put into a cylindrical container having an inner diameter of 15 cm and a height of 30 cm, subjected to vibration compaction for 20 seconds with a table vibrator, and cured for 14 days with air curing, and then each specimen is tested. By cutting vertically, the distribution of aggregates in the cured body was observed, and the presence or absence of material separation was confirmed.
- Test results As a representative example, the longitudinal cross-sectional photograph of the test body of Example 2 and the comparative example 3 was shown in FIG.
- the aggregate was uniformly distributed throughout the test body, but in the comparative example, the aggregate was biased to the bottom and the paste was separated to the top.
- Test 4 (Test method) (1) Table dry density of 5.08 g / cm 3, and about 75% by number of the hot scarf spherical particles density in saturated surface-dry 5.84 g / cm 3, suitably mixed coarse powder converter dust to about 73% by number of spherical particles
- the mixed sands 1 to 4 having the particle size distribution shown in Table 5 were prepared.
- the mixing volume ratio of the mixed sand 2 is “hot scarf 70: coarse powder converter dust 30”.
- “mixed sand” is “heavy fine aggregate”.
- Test 5 (Test method) (1) A hot scarf with a surface dry density of 5.08 g / cm 3 and spherical particles of about 75% by weight, and a granular pig iron with a surface dry density of 5.60 g / cm 3 and spherical particles of about 54% by weight (pulverized from blast furnace granulated slag In the process, magnetic sand separated) was mixed as appropriate, and mixed sands 5 to 10 having a particle size distribution shown in Table 6 were prepared. For example, the mixing volume ratio of the mixed sand 7 is “hot scarf 70: granular pig iron 30”.
- Test 6 (Test method) (1) A hot scarf having a surface dry density of 5.08 g / cm 3 and spherical particles of about 75%, a mill scale composed of a surface dry density of 4.95 g / cm 3 and flat particles are mixed in various volume ratios. A mixed sand was prepared. (2) Ordinary Portland cement is mixed with the mixed sand prepared in (1) at a sand cement volume ratio of 2.68, and 5.84 kg / m 3 of polycarboxylic acid ether-based high-performance AE water reduction per 584 kg / m 3 of cement. agent and, in addition a defoaming agent 0.23 kg / m 3, of 292kg / m 3 water (water-cement ratio 50.0%), and kneaded. (3) Similar to Test 4, the mortar flow was measured.
- the heavy concrete of the present invention can be widely used for heavy concrete applications that require a higher unit volume mass than ordinary concrete, and is particularly useful for applications that require high workability such as pumping.
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Abstract
Description
[歪凹凸度]=[粒子輪郭の周の長さ]/[粒子輪郭面積と同じ面積の正円の直径]
[歪凹凸度]=[粒子輪郭の周の長さ]/[粒子輪郭面積と同じ面積の正円の直径]
すなわち、走査型電子顕微鏡(SEM)画像の目視によって、その陰影から円板状や半球状と判断できる粒子を除き、明らかに球形に近い粒子を画像処理して解析する。画像処理は、一般的な画像処理ソフト(例えば、Adobe Photoshop)を用いて行えばよい。まず、球形に近い粒子の画像から陰影を消して輪郭のみの図形を作成し、該図形の面積と、輪郭の周の長さを求める。該図形を円に近似して(該図形と同面積の円を想定して)、その円の面積πr2から半径rを求め、その2倍として直径を求める。直径に対する周の長さの比は、輪郭が円に近いほど、すなわち粒子が球形に近いほど、小さくなり、円周率πに近い値になる。
[水セメント比(%)]=100×[水の質量]/[セメントの質量]
セメント(以下、略すときは「C」で示す)は、太平洋セメント社製の普通ポルトランドセメントを用いた。細骨材(以下、略すときは「S」で示す)は表2に示したものを用いた。粗骨材(以下、略すときは「G」で示す)としては、大同テクニカ社製造(太平洋セメント社販売)の電気炉ダスト溶融人工石材;DSM2005(表乾密度4.13g/cm3)を用いた。さらに、混和剤として、スランプ配合ではAE減水剤(BASFポゾリス社製;ポゾリスNo.70、以下、略すときは「AD」で示す)を、スランプフロー配合では高機能AE減水剤(BASFポゾリス社製;レオビルドSP-8SV、以下、略すときは「SP」で示す)を用いた。
(試験方法)
(1)表3に示すスランプ配合にて各材料を混合し、コンクリートを混練りした。ここで、「W」は水を示し、「W/C」は「水セメント比」を示す。「W/C」は質量%比で50%とした。
(2)コンクリートのスランプ試験は、JIS A 1101に基づき、水平に設置した平滑な平板上にスランプコーン(上端内径100mm、下端内径200mm、高さ300mm)を置き、該スランプコーンにコンクリートを詰め、上端をならした後、直ちにスランプコーンを静かに鉛直に引き上げ、コンクリートの中央部において下がり(高さの減り)を0.5cm単位で測定し、「スランプ」とした。
スランプ測定結果を表3に合わせて示した。
(試験方法)
(1)表4に示すスランプフロー配合にて各材料を混合し、コンクリートを混練りした。W/C(水セメント比)は質量%比で37%とした。
(2)コンクリートのスランプフロー試験は、JIS A 1150に基づき、スランプ試験と同様にスランプコーンにコンクリートを詰め、スランプコーンを鉛直に引き上げ、コンクリートの動きが止まった後に、広がりが最大と思われる直径と、その直交する方向の直径を測定した。また、このときの材料分離の状態を目視観察した。
スランプフロー測定結果および材料分離の有無を表4に示した。
(試験方法)
試験2のスランプフロー試験で混練りしたコンクリートを内径15cm高さ30cmの円柱容器に投入し、テーブルバイブレーターで20秒間振動締固めを行い、気中養生にて14日間硬化した後、各試験体を垂直方向に切断して硬化体内の骨材の分布状況を観察し、材料分離の有無を確認した。
代表例として、実施例2と比較例3の試験体の縦断面写真を図1に示した。
(試験方法)
(1)表乾密度5.08g/cm3、球状粒子約75個数%のホットスカーフと、表乾密度5.84g/cm3、球状粒子約73個数%の粗粉転炉ダストを適宜混合し、表5に粒度分布を示す混合砂1~4を調製した。例えば、混合砂2の混合容積比は、「ホットスカーフ70:粗粉転炉ダスト30」である。ここで、「混合砂」は「重量細骨材」である。
(2)(1)で調製した混合砂に普通ポルトランドセメントを砂セメント容積比3.19で混合し、セメント547kg/m3あたり、4.37kg/m3のポリカルボン酸エーテル系高性能AE減水剤と、0.22kg/m3の消泡剤と、246kg/m3の水(水セメント比45.0%)を加えて、混練りした。
(3)JIS R 5201セメントの物理試験方法のフローコーンを用い、直径100mm、高さ40mmのフローコーンに(2)で調整したモルタルを充填し、コーンを引き抜いて、モルタルが広がった後の底部の直径をモルタルフローとして測定した。
モルタルフローの測定結果を表5に示した。
(試験方法)
(1)表乾密度5.08g/cm3、球状粒子約75個数%のホットスカーフと、表乾密度5.60g/cm3、球状粒子約54個数%の粒状銑鉄(高炉水砕スラグから粉砕過程で磁選分離したもの)を適宜混合し、表6に粒度分布を示す混合砂5~10を調製した。例えば、混合砂7の混合容積比は、「ホットスカーフ70:粒状銑鉄30」である。
(2)(1)で調製した混合砂に普通ポルトランドセメントを砂セメント容積比3.19で混合し、セメント547kg/m3あたり、5.46kg/m3のポリカルボン酸エーテル系高性能AE減水剤と、0.22kg/m3の消泡剤と、246kg/m3の水(水セメント比45.0%)を加えて、混練りした。
(3)試験4と同様に、モルタルフローを測定した。
モルタルフローの測定結果を表6に示した。
(試験方法)
(1)表乾密度5.08g/cm3、球状粒子約75%のホットスカーフと、表乾密度4.95g/cm3、扁平な粒子で構成されるミルスケールを種々の容積比で混合し、混合砂を調製した。
(2)(1)で調製した混合砂に普通ポルトランドセメントを砂セメント容積比2.68で混合し、セメント584kg/m3あたり、5.84kg/m3のポリカルボン酸エーテル系高性能AE減水剤と、0.23kg/m3の消泡剤と、292kg/m3の水(水セメント比50.0%)を加えて、混練りした。
(3)試験4と同様に、モルタルフローを測定した。
モルタルフローの測定結果を図2に示した。ホットスカーフ(HS)とミルスケール(MS)の混合比率が、20:80ではほとんどモルタルフローが見られず、骨材とセメントペーストとの分離が見られた。30:70からホットスカーフの混合比率が高い場合には、良好なモルタルフローが得られた。このとき、球状粒子の比率は20個数%以上であった。
Claims (4)
- 少なくとも、セメント、重量骨材および水を混合してなる重量コンクリートであって、重量細骨材が、鋼スラブ表面の溶削処理工程で発生するホットスカーフを含むことを特徴とする重量コンクリート。
- 重量細骨材のうち呼び寸法0.15mmのふるいを通過する細骨材が質量百分率で10%ないし20%であって、下記する歪凹凸度が3.3以下の球状粒子が、粒径50μm以上5mm以下の全粒子のうち20%以上であることを特徴とする請求項1に記載の重量コンクリート。
[歪凹凸度]=[粒子輪郭の周の長さ]/[粒子輪郭面積と同じ面積の正円の直径] - 重量粗骨材が、製鋼過程で発生するダストを含む廃棄物を溶融して製造された人工石材を含むことを特徴とする請求項1または2に記載の重量コンクリート。
- 請求項1~3のいずれかに記載の重量コンクリートを硬化させてなる重量コンクリート硬化体。
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KR1020107007397A KR101380419B1 (ko) | 2008-01-29 | 2009-01-26 | 중량 콘크리트 |
US12/743,164 US8252111B2 (en) | 2008-01-29 | 2009-01-26 | Heavy concrete |
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EP2484651A4 (en) * | 2009-10-01 | 2017-01-04 | Korea Railroad Research Institute | Heavy concrete composition using slag by-products |
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JP5883640B2 (ja) * | 2011-12-22 | 2016-03-15 | 太平洋マテリアル株式会社 | 重量ポリマーセメントモルタル |
JP2014025722A (ja) * | 2012-07-24 | 2014-02-06 | Ohbayashi Corp | 海水で練り混ぜた放射線遮蔽用コンクリート |
JP6137466B2 (ja) * | 2013-04-18 | 2017-05-31 | 三菱マテリアル株式会社 | ブリーディングを抑制した銅スラグ細骨材とそのコンクリート |
JP6257204B2 (ja) * | 2013-07-26 | 2018-01-10 | 株式会社ドリームプロジェクト | 放射線遮蔽パネル |
KR102678712B1 (ko) * | 2021-09-29 | 2024-06-28 | 디엘이앤씨 주식회사 | 고밀도 시멘트 복합체를 이용한 층간소음 저감용 합성 슬래브 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06122538A (ja) * | 1992-10-14 | 1994-05-06 | Kawasaki Steel Corp | 重量コンクリートの製造方法及び重量コンクリート |
JP2004091324A (ja) * | 2003-11-06 | 2004-03-25 | Dowa Mining Co Ltd | 重量コンクリート |
JP2004210574A (ja) * | 2002-12-27 | 2004-07-29 | Kokan Kogyo Kk | 重量コンクリート |
US20060243168A1 (en) * | 2003-09-15 | 2006-11-02 | Wheelabrator_Allevard | High-wearing-resistant composite material comprising steel-based shot and method for producing said material |
JP2007008758A (ja) * | 2005-06-30 | 2007-01-18 | Jtekt Corp | 複合材料 |
JP4044956B1 (ja) * | 2006-11-22 | 2008-02-06 | 太平洋セメント株式会社 | 重量骨材 |
WO2008062580A1 (en) * | 2006-11-22 | 2008-05-29 | Taiheiyo Cement Corporation | Heavy weight aggregates |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0444956A (ja) | 1990-06-08 | 1992-02-14 | Eisai Co Ltd | 個別管理できるアンプル類 |
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Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06122538A (ja) * | 1992-10-14 | 1994-05-06 | Kawasaki Steel Corp | 重量コンクリートの製造方法及び重量コンクリート |
JP2004210574A (ja) * | 2002-12-27 | 2004-07-29 | Kokan Kogyo Kk | 重量コンクリート |
US20060243168A1 (en) * | 2003-09-15 | 2006-11-02 | Wheelabrator_Allevard | High-wearing-resistant composite material comprising steel-based shot and method for producing said material |
JP2004091324A (ja) * | 2003-11-06 | 2004-03-25 | Dowa Mining Co Ltd | 重量コンクリート |
JP2007008758A (ja) * | 2005-06-30 | 2007-01-18 | Jtekt Corp | 複合材料 |
JP4044956B1 (ja) * | 2006-11-22 | 2008-02-06 | 太平洋セメント株式会社 | 重量骨材 |
WO2008062580A1 (en) * | 2006-11-22 | 2008-05-29 | Taiheiyo Cement Corporation | Heavy weight aggregates |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2484651A4 (en) * | 2009-10-01 | 2017-01-04 | Korea Railroad Research Institute | Heavy concrete composition using slag by-products |
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US8252111B2 (en) | 2012-08-28 |
US20100282130A1 (en) | 2010-11-11 |
KR101380419B1 (ko) | 2014-04-01 |
KR20100109895A (ko) | 2010-10-11 |
JP2009179493A (ja) | 2009-08-13 |
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