JP2001220188A - Coating material for lightweight aggregate and coated lightweight aggregate - Google Patents
Coating material for lightweight aggregate and coated lightweight aggregateInfo
- Publication number
- JP2001220188A JP2001220188A JP2000023613A JP2000023613A JP2001220188A JP 2001220188 A JP2001220188 A JP 2001220188A JP 2000023613 A JP2000023613 A JP 2000023613A JP 2000023613 A JP2000023613 A JP 2000023613A JP 2001220188 A JP2001220188 A JP 2001220188A
- Authority
- JP
- Japan
- Prior art keywords
- lightweight aggregate
- coating material
- aggregate
- fiber
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 title claims abstract description 24
- 239000011248 coating agent Substances 0.000 title claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000843 powder Substances 0.000 claims abstract description 25
- 239000004568 cement Substances 0.000 claims abstract description 17
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 32
- 239000002184 metal Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229920002978 Vinylon Polymers 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 229920006231 aramid fiber Polymers 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000003562 lightweight material Substances 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims 1
- 238000005507 spraying Methods 0.000 abstract description 2
- 229920000914 Metallic fiber Polymers 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 27
- 239000011398 Portland cement Substances 0.000 description 10
- 238000010521 absorption reaction Methods 0.000 description 6
- 239000010453 quartz Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 5
- 238000004898 kneading Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910021487 silica fume Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010456 wollastonite Substances 0.000 description 2
- 229910052882 wollastonite Inorganic materials 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 239000012237 artificial material Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000011022 opal Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1077—Cements, e.g. waterglass
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、超高強度コンクリ
ート硬化体からなる軽量骨材用被覆材料および被覆軽量
骨材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight aggregate coating material and a lightweight aggregate made of an ultra-high strength hardened concrete.
【０００２】[0002]
【従来の技術】従来、軽量コンクリートに使用する軽量
骨材としては、天然に産するものとしては火山れきおよ
びその加工品からなる天然軽量骨材がある。2. Description of the Related Art Conventionally, as a lightweight aggregate used for lightweight concrete, there is a natural lightweight aggregate made of volcanic debris and a processed product thereof, which is produced naturally.
【０００３】また、人工によるものとしては、膨張けつ
岩、膨張粘土、焼成フライアッシュなどの人工軽量骨材
がある。[0003] Artificial materials include artificial lightweight aggregates such as expanded shale, expanded clay and fired fly ash.
【０００４】[0004]
【発明が解決しようとする課題】しかし、従来の軽量骨
材は、吸水率が高く、コンクリートを練り混ぜる最中に
骨材が吸水し施工性が低下するという課題があり、従っ
て使用直前にあらかじめ骨材に水を散布させて吸水させ
なければならないという問題点があった。さらには、骨
材強度も低いという問題点があった。したがって、本発
明の目的は、吸水率が低く、骨材強度の高い軽量骨材を
提供することにある。However, the conventional lightweight aggregate has a high water absorption rate and has a problem that the aggregate absorbs water during kneading of the concrete and the workability is deteriorated. There is a problem that water has to be absorbed by spraying water on the aggregate. Furthermore, there was a problem that the aggregate strength was low. Therefore, an object of the present invention is to provide a lightweight aggregate having a low water absorption and a high aggregate strength.
【０００５】[0005]
【課題を解決するための手段】発明者らは上記課題を解
決するための研究を重ねた結果、本発明の課題を解決す
る手段として、少なくとも、セメント、ポゾラン質微紛
末、粒径２ｍｍ以下の骨材、水、及び減水剤を含む配合
物の硬化体からなることを特徴とする軽量骨材用被覆材
料を提案する。また、前記配合物に、金属繊維及び／又
は有機繊維を含むことを特徴とする軽量骨材用被覆材料
を提案する。また、前記配合物に、平均粒径３〜２０μ
ｍの無機粉末を含むことを特徴とする軽量骨材用被覆材
料を提案する。さらに、前記配合物に、平均粒度１ｍｍ
以下の繊維状粒子又は薄片状粒子を含むことを特徴とす
る軽量骨材用被覆材料を提案する。そして、さらに前記
軽量骨材用被覆材料を被覆層の厚みが２〜５ｍｍとなる
ように軽量骨材の表面を被覆したことを特徴とする被覆
軽量骨材を提案する。Means for Solving the Problems As a result of repeated studies for solving the above problems, the inventors have found that at least means for solving the problems of the present invention include cement, pozzolanic fine powder, and a particle diameter of 2 mm or less. The present invention proposes a coating material for a lightweight aggregate, comprising a cured product of a composition containing the above aggregate, water, and a water reducing agent. Further, the present invention proposes a coating material for a lightweight aggregate, characterized in that the composition contains metal fibers and / or organic fibers. In addition, the composition has an average particle size of 3 to 20 μm.
The present invention proposes a coating material for a lightweight aggregate, characterized by containing m inorganic powder. Furthermore, an average particle size of 1 mm
A coating material for a lightweight aggregate, comprising the following fibrous particles or flaky particles, is proposed. Further, the present invention proposes a coated lightweight aggregate, wherein the surface of the lightweight aggregate is coated with the coating material for a lightweight aggregate such that the thickness of the coating layer is 2 to 5 mm.
【０００６】本発明によれば、吸水率が低く、骨材強度
の高い軽量骨材を提供することが可能となる。According to the present invention, it is possible to provide a lightweight aggregate having a low water absorption and a high aggregate strength.
【０００７】[0007]
【発明の実施の形態】以下、本発明について詳細に説明
する。本発明において用いられるセメントの種類は限定
されない。普通ポルトランドセメント、早強ポルトラン
ドセメント、中庸熱ポルトランドセメント、低熱ポルト
ランドセメント等の各種ポルトランドセメントや高炉セ
メント、フライアッシュセメント等の混合セメントを使
用することができる。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The type of cement used in the present invention is not limited. Various portland cements such as ordinary Portland cement, early-strength Portland cement, medium heat Portland cement, low heat Portland cement, and mixed cements such as blast furnace cement and fly ash cement can be used.
【０００８】また本発明において、コンクリートの早期
強度を向上しようとする場合には、早強ポルトランドセ
メントを使用することが好ましく、コンクリートの流動
性を向上しようとする場合は、中庸熱ポルトランドセメ
ントや低熱ポルトランドセメントを使用することが好ま
しい。In the present invention, it is preferable to use early-strength Portland cement when it is intended to improve the early strength of concrete, and when it is desired to improve the fluidity of concrete, it is preferable to use a medium heat Portland cement or a low heat Portland cement. It is preferred to use Portland cement.
【０００９】ポゾラン質微粉末としては、シリカフュー
ム、シリカダスト、フライアッシュ、スラグ、火山灰、
シリカゾル、沈降シリカ等が挙げられる。一般に、シリ
カフュームやシリカダストでは、その平均粒径は、１．
０μｍ以下であり、粉砕等をする必要がないので本発明
のポゾラン質微粉末として好適である。As the pozzolanic fine powder, silica fume, silica dust, fly ash, slag, volcanic ash,
Silica sol, precipitated silica and the like. Generally, in silica fume and silica dust, the average particle size is 1.
Since it is 0 μm or less and it is not necessary to grind, it is suitable as the pozzolanic fine powder of the present invention.
【００１０】ポゾラン質微粉末を配合することにより、
マイクロフィラー効果およびセメント分散効果によりコ
ンクリートが緻密化し、圧縮強度が向上する。一方、ポ
ゾラン質微粉末の添加量が多くなると単位水量が増大す
るので、ポゾラン質微粉末の添加量はセメント１００重
量部に対して５〜５０重量部が好ましい。By blending pozzolanic fine powder,
The concrete is densified by the microfiller effect and the cement dispersing effect, and the compressive strength is improved. On the other hand, when the amount of the pozzolanic fine powder increases, the unit water amount increases. Therefore, the amount of the pozzolanic fine powder to be added is preferably 5 to 50 parts by weight based on 100 parts by weight of the cement.
【００１１】本発明においては粒径２ｍｍ以下の骨材が
用いられる。ここで、骨材の粒径とは、８５％（重量）
累積粒径である（２ｍｍより大きい骨材が含まれていて
も良い）。骨材の粒径が２ｍｍを超えると、強度が低下
する。なお、コンクリートの分離抵抗性、硬化後の強度
等から、最大粒径が２ｍｍ以下の骨材を用いることが好
ましく、最大粒径が１．５ｍｍ以下の骨材を用いること
がより好ましい。In the present invention, an aggregate having a particle size of 2 mm or less is used. Here, the particle size of the aggregate is 85% (weight).
It is a cumulative particle size (an aggregate larger than 2 mm may be included). If the particle size of the aggregate exceeds 2 mm, the strength decreases. It is preferable to use an aggregate having a maximum particle size of 2 mm or less, more preferably an aggregate having a maximum particle size of 1.5 mm or less, from the viewpoint of the separation resistance of the concrete, the strength after hardening, and the like.
【００１２】骨材としては、川砂、陸砂、海砂、砕砂、
珪砂及びこれらの混合物を使用することができる。骨材
の配合量は、コンクリートの作業性や分離抵抗性、硬化
後の強度やクラックに対する抵抗性等から、セメント１
００重量部に対して５０〜２５０重量部が好ましく、８
０〜１８０重量部がより好ましい。Aggregates include river sand, land sand, sea sand, crushed sand,
Silica sand and mixtures thereof can be used. The amount of the aggregate is determined based on the workability and separation resistance of the concrete, the strength after hardening and the resistance to cracks, etc.
50 to 250 parts by weight, preferably 8 parts by weight,
0 to 180 parts by weight is more preferred.
【００１３】減水剤としては、リグニン系、ナフタレン
スルホン酸系、メラミン系、ポリカルボン酸系の減水
剤、高性能減水剤又は高性能ＡＥ減水剤を使用すること
ができる。それらの中でも、高性能減水剤又は高性能Ａ
Ｅ減水剤を使用することが好ましい。減水剤の添加量
（セメントに対して外割）は、コンクリートの流動性や
分離抵抗性、硬化後の強度、さらにはコスト等から、セ
メントに対して、固形分換算で、０．５〜４．０重量％
が好ましい。As the water reducing agent, a lignin-based, naphthalene-sulfonic acid-based, melamine-based, polycarboxylic acid-based water reducing agent, a high performance water reducing agent or a high performance AE water reducing agent can be used. Among them, high performance water reducing agent or high performance A
It is preferred to use an E water reducer. The amount of the water reducing agent added (outside the cement) is 0.5 to 4 in terms of solid content with respect to the cement in view of the fluidity and separation resistance of the concrete, the strength after hardening, and the cost. 0.0% by weight
Is preferred.
【００１４】本発明において、水／セメント比は、コン
クリートの流動性や分離抵抗性、硬化体の強度や耐久性
等から、１０〜３０重量％が好ましく、１５〜２５重量
％がより好ましい。In the present invention, the water / cement ratio is preferably from 10 to 30% by weight, more preferably from 15 to 25% by weight, from the viewpoint of the fluidity and separation resistance of the concrete, the strength and durability of the cured product.
【００１５】本発明においては、硬化体の曲げ強度を高
める観点から、配合物に金属繊維及び／又は有機質繊維
を含ませることが好ましい。金属繊維としては、鋼繊
維、アモルファス繊維等が挙げられるが、中でも鋼繊維
は強度に優れており、またコストや入手のし易さの点か
らも好ましいものである。金属繊維は、径０．０１〜
１．０ｍｍ、長さ２〜３ｍｍのものが好ましい。径が
０．０１ｍｍ未満では、繊維自身の強度が不足し、張力
を受けた際に切れやすくなる。径が１．０ｍｍを超える
と、同一配合量での本数が少なくなり、コンクリートの
曲げ強度が低下する。長さは、２〜３ｍｍのものがマト
リツクスとの付着力と被覆層の厚みの制限の要因から好
ましい。In the present invention, from the viewpoint of increasing the bending strength of the cured product, it is preferable that the composition contains metal fibers and / or organic fibers. Examples of the metal fiber include a steel fiber and an amorphous fiber. Among them, the steel fiber is excellent in strength, and is preferable from the viewpoint of cost and availability. Metal fibers have a diameter of 0.01 to
Those having a length of 1.0 mm and a length of 2 to 3 mm are preferred. When the diameter is less than 0.01 mm, the strength of the fiber itself is insufficient, and the fiber tends to be cut when subjected to tension. If the diameter exceeds 1.0 mm, the number of pieces with the same blending amount decreases, and the flexural strength of concrete decreases. The length is preferably 2 to 3 mm from the viewpoint of the adhesion to the matrix and the limitation of the thickness of the coating layer.
【００１６】金属繊維の配合量は凝結後のコンクリート
の体積の４％未満が好ましく、より好ましくは３．５％
未満である。金属繊維の含有量は、流動性と硬化体の曲
げ強度の観点から定められる。一般に、金属繊維の含有
量が多くなると曲げ強度が向上するが、一方、流動性を
確保するために単位水量も増大するので、金属繊維の含
有量は前記の量が好ましい。The amount of the metal fiber is preferably less than 4%, more preferably 3.5% of the volume of the concrete after setting.
Is less than. The content of the metal fiber is determined from the viewpoint of fluidity and bending strength of the cured product. In general, as the content of the metal fiber increases, the bending strength improves, but on the other hand, the unit water amount also increases in order to secure fluidity. Therefore, the content of the metal fiber is preferably the above-mentioned amount.
【００１７】有機質繊維としては、ビニロン繊維、ポリ
プロピレン繊維、ポリエチレン繊維、アラミド繊維、炭
素繊維等が挙げられる。有機質繊維は、径０．００５〜
１．０ｍｍ、長さ２〜３ｍｍのものが好ましい。有機質
繊維の含有量は、凝結後のコンクリート体積の１０％未
満が好ましく、７％未満がより好ましい。なお、本発明
においては、金属繊維と有機質繊維を併用することは差
し支えない。Examples of the organic fibers include vinylon fibers, polypropylene fibers, polyethylene fibers, aramid fibers, and carbon fibers. Organic fibers have a diameter of 0.005 to
Those having a length of 1.0 mm and a length of 2 to 3 mm are preferred. The content of the organic fibers is preferably less than 10%, more preferably less than 7% of the concrete volume after setting. In the present invention, it is possible to use metal fibers and organic fibers in combination.
【００１８】本発明においては、硬化体の充填密度を高
める観点から、平均粒径３〜２０μｍ、より好ましくは
平均粒径４〜１０μｍの無機粉末を含ませることが好ま
しい。無機粉末としては、石英粉末、石灰石粉末、Ａｌ
2Ｏ3等の酸化物粉末、ＳｉＣ等の炭化物粉末、窒化物粉
末等か挙げられるが、中でも、石英粉末は、コストや硬
化体の品質安定性の点から好ましいものである。なお、
石英粉末としては、石英や非晶質石英、オパール質やク
リストバライト質のシリカ含有粉末等が挙げられる。無
機粉末の配合量は、コンクリートの流動性、硬化体の強
度から、セメント１００重量部に対して５０重量部以下
が好ましく、２０〜３５重量部がより好ましい。In the present invention, from the viewpoint of increasing the packing density of the cured product, it is preferable to include an inorganic powder having an average particle size of 3 to 20 μm, more preferably 4 to 10 μm. As the inorganic powder, quartz powder, limestone powder, Al
Examples thereof include oxide powders such as 2 O 3 , carbide powders such as SiC, and nitride powders. Among them, quartz powders are preferred in view of cost and quality stability of the cured product. In addition,
Examples of the quartz powder include quartz and amorphous quartz, and opal and cristobalite silica-containing powders. The mixing amount of the inorganic powder is preferably 50 parts by weight or less, more preferably 20 to 35 parts by weight, based on 100 parts by weight of cement, from the viewpoint of the fluidity of the concrete and the strength of the hardened material.
【００１９】本発明においては、硬化体の靭性を高める
観点から、平均粒径が１ｍｍ以下の繊維状粒子又は薄片
状粒子を含ませることが好ましい。ここで、粒子の粒度
とは、その最大寸法の大きさ（特に、繊維状粒子ではそ
の長さ）である。繊維状粒子としては、ウォラストナイ
ト、ボーキサイト、ムライト等が、薄片状粒子として
は、マイカフレーク、タルクフレーク、バーミキュライ
トフレーク、アルミナフレーク等が挙げられる。繊維状
粒子又は薄片状粒子の配合量は、コンクリートの流動
性、硬化体の強度や靭性等から、セメント１００重量部
に対して３５重量部以下が好ましく、１０〜２５重量部
がより好ましく。なお、繊維状粒子においては、硬化体
の靭性を高める観点から、長さ／直径の比で表わされる
針状度が３以上のものを用いるのが好ましい。In the present invention, from the viewpoint of increasing the toughness of the cured product, it is preferable to include fibrous particles or flaky particles having an average particle size of 1 mm or less. Here, the particle size of a particle is the size of its maximum dimension (in particular, its length for fibrous particles). Examples of the fibrous particles include wollastonite, bauxite, and mullite, and examples of the flaky particles include mica flake, talc flake, vermiculite flake, and alumina flake. The compounding amount of the fibrous particles or flaky particles is preferably 35 parts by weight or less, more preferably 10 to 25 parts by weight, based on 100 parts by weight of cement, from the viewpoint of the fluidity of the concrete, the strength and the toughness of the cured product. From the viewpoint of increasing the toughness of the cured product, it is preferable to use fibrous particles having a needleiness expressed by a length / diameter ratio of 3 or more.
【００２０】本発明においては、コンクリートの混練に
用いる装置も特に限定するものではなく、オムニミキ
サ、パン型ミキサ、二軸練りミキサ、傾胴ミキサ等の慣
用のミキサを使用することができる。In the present invention, the apparatus used for kneading the concrete is not particularly limited, and a conventional mixer such as an omni-mixer, a pan-type mixer, a twin-screw kneading mixer, and a tilting mixer can be used.
【００２１】上記混練したコンクリートを軽量骨材用被
覆材料として用いて軽量骨材の表面に被覆し、養生硬化
することで、本発明の被覆軽量骨材を製造することがで
きる。なお、被覆方法としては特に限定するものではな
く、慣用の被覆方法が適用できる。また、被覆材料の養
生方法も特に限定するものではなく、常温養生や蒸気養
生等を行えばよい。The surface of the lightweight aggregate is coated with the kneaded concrete as a coating material for the lightweight aggregate, and cured and cured, whereby the coated lightweight aggregate of the present invention can be produced. The coating method is not particularly limited, and a conventional coating method can be applied. Further, the method of curing the coating material is not particularly limited, and may be room temperature curing, steam curing, or the like.
【００２２】ここで、被覆材料を被覆層の厚みが２〜５
ｍｍとなるように軽量骨材の表面を被覆する理由は、２
ｍｍより薄いと吸水率と強度の改善効果がなく、５ｍｍ
より厚いと骨材の軽量性が低下するからである。Here, the thickness of the coating layer is 2-5.
mm, the reason for coating the surface of the lightweight aggregate is 2
If the thickness is less than 5 mm, there is no effect of improving the water absorption and strength,
If the thickness is larger, the lightness of the aggregate is reduced.
【００２３】以下、具体的な実施例を挙げて本発明を説
明する。軽量骨材用被覆材料の使用材料は、下記の通り
である。 セメント ：低熱ポルトランドセメント（太平洋セメント（株）製） ポゾラン質微粉末 ：シリカフューム（平均粒径０．７μｍ） 骨材 ：珪砂４号と珪砂５号の２：１（重量比）混合品 金属繊維 ：鋼繊維（直径０．２ｍｍ、長さ２．５ｍｍ） 有機質繊維 ：ビニロン繊維（直径０．６ｍｍ、長さ２．５ｍｍ） 高性能ＡＥ減水剤 ：ポリカルボン酸系高性能ＡＥ減水剤 水 ：水道水 石英粉 ：平均粒径７μｍの石英粉 繊維状粒子 ：ウォラストナイト（平均長さ０．３ｍｍ、針状比４） Hereinafter, the present invention will be described with reference to specific examples. The materials used for the coating material for the lightweight aggregate are as follows. Cement: Low heat Portland cement (manufactured by Taiheiyo Cement Co., Ltd.) Pozzolanic fine powder: Silica fume (average particle size 0.7 μm) Aggregate: 2: 1 (weight ratio) mixture of silica sand No. 4 and silica sand No. 5 Metal fiber: Steel fiber (diameter 0.2 mm, length 2.5 mm) Organic fiber: vinylon fiber (diameter 0.6 mm, length 2.5 mm) High-performance AE water reducing agent: Polycarboxylic acid-based high-performance AE water reducing agent Water: tap water Quartz powder: quartz powder with an average particle diameter of 7 μm Fibrous particles: wollastonite (average length 0.3 mm, needle ratio 4)
【００２４】配合条件は下記の通りである。 セメント ：１００重量部 ポゾラン質微粉末 ：３２．５重量部 骨材 ：１２０重量部 高性能ＡＥ減水剤 ：セメントに対して１．０重量％
（固形分） 水／セメント比 ：２２重量％The compounding conditions are as follows. Cement: 100 parts by weight Pozzolanic fine powder: 32.5 parts by weight Aggregate: 120 parts by weight High-performance AE water reducing agent: 1.0% by weight based on cement
(Solid content) Water / cement ratio: 22% by weight
【００２５】上記配合材料を二軸練りミキサに一括投入
して混練し、軽量骨材用被覆材料を得た。次に、パン型
ミキサに投入され転動している直径１５ｍｍの軽量骨材
に前記被覆材料を投入し被覆させた。The above blended materials were put into a biaxial kneading mixer at a time and kneaded to obtain a lightweight aggregate coating material. Next, the above-mentioned coating material was applied to and covered a 15-mm-diameter lightweight aggregate which was put into a pan-type mixer and rolled.
【００２６】得られた試料を前置き（２０℃）で４８時
間、９０℃で４８時間蒸気養生して、被覆層の厚みが３
ｍｍの被覆軽量骨材を得た。The obtained sample was subjected to steam curing at an initial temperature (20 ° C.) for 48 hours and at 90 ° C. for 48 hours.
mm of coated lightweight aggregate was obtained.
【００２７】得られた被覆軽量骨材は、吸水率が１％と
低く、さらに圧壊強度も１０００Ｎ以上と高かった。The resulting coated lightweight aggregate had a low water absorption of 1% and a high crushing strength of 1000 N or more.
【００２８】[0028]
【発明の効果】本発明により、使用する直前に予め水を
散布させて吸水させる必要のない程度に吸水率が低く、
さらに骨材強度も十分に高い軽量骨材を提供することが
できる。According to the present invention, the water absorption rate is so low that it is not necessary to spray water in advance immediately before use and to absorb water.
Further, a lightweight aggregate having sufficiently high aggregate strength can be provided.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０４Ｂ 14:48 Ｃ０４Ｂ 14:48 Ｚ 16:06 16:06 Ｂ 20:00 20:00 Ｂ 14:06 14:06 Ｚ 14:38） 14:38） Ｃ 103:30 103:30 111:40 111:40 Ｆターム(参考） 4G012 PA03 PA04 PA07 PA11 PA12 PA19 PA24 PA27 PA28 PA29 PB04 4G028 DA01 DB01 DB07 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification code FI Theme coat ゛ (Reference) C04B 14:48 C04B 14:48 Z 16:06 16:06 B 20:00 20:00 B 14:06 14 : 06 Z 14:38) 14:38) C 103: 30 103: 30 111: 40 111: 40 F term (reference) 4G012 PA03 PA04 PA07 PA11 PA12 PA19 PA24 PA27 PA28 PA29 PB04 4G028 DA01 DB01 DB07
Claims (7)
末、粒径２ｍｍ以下の骨材、水、及び減水剤を含む配合
物の硬化体からなることを特徴とする軽量骨材用被覆材
料。1. A coating material for a lightweight aggregate comprising at least a cement, a pozzolanic fine powder, an aggregate having a particle diameter of 2 mm or less, a cured product of a compound containing water and a water reducing agent.
を含むことを特徴とする請求項１に記載の軽量骨材用被
覆材料。2. The coating material for a lightweight aggregate according to claim 1, wherein the composition contains metal fibers and / or organic fibers.
長さ２〜３ｍｍの鋼繊維であることを特徴とする請求項
２に記載の軽量骨材用被覆材料。3. The metal fiber has a diameter of 0.01 to 1.0 mm,
The coating material for a lightweight aggregate according to claim 2, wherein the coating material is a steel fiber having a length of 2 to 3 mm.
ｍ、長さ２〜３ｍｍのビニロン繊維、ポリプロピレン繊
維、ポリエチレン繊維、アラミド繊維、炭素繊維から選
ばれる一種以上の繊維であることを特徴とする請求項２
に記載の軽量骨材用被覆材料。4. The organic fiber has a diameter of 0.005 to 1.0 m.
m, one or more fibers selected from vinylon fiber, polypropylene fiber, polyethylene fiber, aramid fiber and carbon fiber having a length of 2 to 3 mm.
4. The coating material for lightweight aggregate according to claim 1.
粉末を含むことを特徴とする請求項１〜４のいずれかに
記載の軽量骨材用被覆材料。5. The coating material for lightweight aggregate according to claim 1, wherein the composition contains an inorganic powder having an average particle size of 3 to 20 μm.
粒子又は薄片状粒子を含むことを特徴とする請求項１〜
５のいずれかに記載の軽量骨材用被覆材料。6. The composition according to claim 1, comprising fibrous particles or flaky particles having an average particle size of 1 mm or less.
5. The coating material for lightweight aggregate according to any one of 5.
材用被覆材料を被覆層の厚みが２〜５ｍｍとなるように
軽量骨材の表面を被覆したことを特徴とする被覆軽量骨
材。7. A coated lightweight material wherein the surface of a lightweight aggregate is coated with the coating material for a lightweight aggregate according to any one of claims 1 to 5 so that the thickness of the coating layer is 2 to 5 mm. aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000023613A JP2001220188A (en) | 2000-02-01 | 2000-02-01 | Coating material for lightweight aggregate and coated lightweight aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000023613A JP2001220188A (en) | 2000-02-01 | 2000-02-01 | Coating material for lightweight aggregate and coated lightweight aggregate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001220188A true JP2001220188A (en) | 2001-08-14 |
Family
ID=18549741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000023613A Pending JP2001220188A (en) | 2000-02-01 | 2000-02-01 | Coating material for lightweight aggregate and coated lightweight aggregate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001220188A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7241338B2 (en) * | 2003-09-30 | 2007-07-10 | The Regents Of The University Of Michigan | Sprayable, strain-hardening cementitious compositions |
| WO2015136290A1 (en) * | 2014-03-12 | 2015-09-17 | Enviromate Limited | Construction material and method of manufacturing the same |
-
2000
- 2000-02-01 JP JP2000023613A patent/JP2001220188A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7241338B2 (en) * | 2003-09-30 | 2007-07-10 | The Regents Of The University Of Michigan | Sprayable, strain-hardening cementitious compositions |
| WO2015136290A1 (en) * | 2014-03-12 | 2015-09-17 | Enviromate Limited | Construction material and method of manufacturing the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2001240440A (en) | Steel fiber for reinforcing concrete and fiber reinforced concrete | |
| JP4056696B2 (en) | Cement slurry | |
| JP2001220201A (en) | Fiber reinforced concrete | |
| JP2002068806A (en) | Ultrahigh strength hydraulic composition | |
| JP2001254302A (en) | Sleeper for railway line | |
| JP2001220188A (en) | Coating material for lightweight aggregate and coated lightweight aggregate | |
| JP2001226162A (en) | Joint filler material for post-tension-prestressed concrete plate | |
| JP2001226958A (en) | Steel pipe concrete pile | |
| JP2001212817A (en) | Method for producing fiber-reinforced concrete | |
| JP2001253749A (en) | High-strength light weight cement hardened body | |
| JP2001247350A (en) | Repairing material | |
| JP2003055019A (en) | Hardened body | |
| JP2001213654A (en) | Quick-setting mortar or concrete with ultra high strength | |
| JP2001253745A (en) | Fiber-reinforced concrete | |
| JP2001240450A (en) | Mixture for mending the structure and mending method | |
| JP2001226160A (en) | Ultrahigh strength cement hardened body | |
| JP2001213659A (en) | Binder for overlay concrete | |
| JP2001262562A (en) | Concrete pile | |
| JP2001213661A (en) | Composite material | |
| JP2001248290A (en) | Floor panel | |
| JP2001261401A (en) | Reinforced concrete | |
| JP2001226175A (en) | Surface coating material | |
| JP2001220200A (en) | Water-sealing material | |
| JP2001250443A (en) | Insulator and adhesive therefor | |
| JP2002137952A (en) | Hydraulic composition |