JP2002362958A - Water-permeable concrete - Google Patents
Water-permeable concreteInfo
- Publication number
- JP2002362958A JP2002362958A JP2001169957A JP2001169957A JP2002362958A JP 2002362958 A JP2002362958 A JP 2002362958A JP 2001169957 A JP2001169957 A JP 2001169957A JP 2001169957 A JP2001169957 A JP 2001169957A JP 2002362958 A JP2002362958 A JP 2002362958A
- Authority
- JP
- Japan
- Prior art keywords
- water
- cement
- weight
- reducing agent
- permeable concrete
- 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.)
- Granted
Links
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
- 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
-
- 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
- C04B2111/00284—Materials permeable to liquids
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、大きな透水係数及
び圧縮強度を有し、かつ、成形等の作業が容易である透
水性コンクリートに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permeable concrete having a large coefficient of water permeability and compressive strength, and which can be easily formed and formed.
【０００２】[0002]
【従来の技術】従来より、大きな透水係数及び圧縮強度
を有する透水性コンクリートとして、普通ポルトランド
セメント又は早強ポルトランドセメント100重量部に対
して、粒径0.3mm以下の細骨材100重量部程度、液体高性
能減水剤1.2重量部程度（固形分換算）、水24重量部程
度、及び粗骨材600重量部程度をミキサに投入して混練
し、混練物（粗骨材に粗骨材以外の材料からなるモルタ
ルが被覆した状態の粒体）を調製し、該混練物を型枠に
投入して振動成形し、養生することによって製造される
透水性コンクリートが知られている。上記透水性コンク
リートは、例えば、 １）粗骨材として5号砕石（粒径13〜20mm）を使用した
場合、透水係数が7.0〜9.0cm/sec程度で、圧縮強度が15
〜20N/mm2程度 ２）粗骨材として7号砕石（粒径2.5〜5.0mm）を使用し
た場合、透水係数が1.0〜1.3cm/sec程度で、圧縮強度が
20〜30N/mm2程度と大きな透水係数及び圧縮強度を有す
るものである。2. Description of the Related Art Conventionally, as permeable concrete having a large coefficient of permeability and compressive strength, about 100 parts by weight of fine aggregate having a particle size of 0.3 mm or less with respect to 100 parts by weight of ordinary Portland cement or early-strength Portland cement, About 1.2 parts by weight of liquid high-performance water reducing agent (in terms of solid content), about 24 parts by weight of water, and about 600 parts by weight of coarse aggregate are put into a mixer and kneaded, and the kneaded material (coarse aggregate other than coarse aggregate is added) There is known a water-permeable concrete manufactured by preparing a granular material covered with a mortar made of a material, charging the kneaded material into a mold frame, vibration-molding and curing. The permeable concrete includes, for example: 1) When crushed stone No. 5 (particle size: 13 to 20 mm) is used as coarse aggregate, the permeability is about 7.0 to 9.0 cm / sec, and the compressive strength is 15
~ 20N / mm2 2 ) When using No.7 crushed stone (particle size 2.5 ~ 5.0mm) as coarse aggregate, the permeability is about 1.0 ~ 1.3cm / sec and the compressive strength is
It has a large water permeability and compressive strength of about 20 to 30 N / mm2.
【０００３】[0003]
【発明が解決しようとする課題】上記透水性コンクリー
トにおいては、混練物（粗骨材に粗骨材以外の材料から
なるモルタルが被覆した状態の粒体）を振動成形する
際、モルタルが型枠の底部に流れ落ちて透水性コンクリ
ートの透水係数を低下させることを防ぐために、比較的
粘性が高いモルタルを用いて混練物を調製している。そ
のため、上記透水性コンクリートにおいては、混練物の
作業性が低く、成形等の作業に手間がかかる（例えば、
振動時間が長くなる等）、という問題があった。In the above-described permeable concrete, when the kneaded material (granules in which coarse aggregate is covered with mortar made of a material other than coarse aggregate) is subjected to vibration molding, the mortar is formed by a mold. In order to prevent the water from flowing down to the bottom and lowering the permeability of the permeable concrete, the kneaded material is prepared using mortar having a relatively high viscosity. Therefore, in the permeable concrete, the workability of the kneaded material is low, and the work such as molding takes time (for example,
Vibration time becomes longer).
【０００４】本発明は上記課題を解決し、大きな透水係
数及び圧縮強度を有し、かつ、成形等の作業が容易であ
る透水性コンクリートを提供することを目的とする。An object of the present invention is to solve the above-mentioned problems, and to provide a permeable concrete having a large coefficient of water permeability and compressive strength, and which is easy to perform operations such as molding.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、上記課題
を解決すべく鋭意研究した結果、透水性コンクリート用
の材料として、セメント若しくはセメントを含む粉体混
合物、減水剤若しくはＡＥ減水剤、細骨材、粗骨材及び
水を使用するとともに、その配合割合を特定することに
より、上記課題を解決することができることを見いだ
し、本発明を完成させたものである。Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above problems, and as a result, as a material for permeable concrete, cement or a powder mixture containing cement, a water reducing agent or an AE water reducing agent, The present inventors have found that the above problem can be solved by using fine aggregate, coarse aggregate and water, and specifying the mixing ratio thereof, thereby completing the present invention.
【０００６】即ち、本発明は、粗骨材と、該粗骨材に対
する容積比が30〜80％のペースト又はモルタルとからな
る組成物の混練物を型枠に投入して成形し、養生してな
る透水性コンクリートであって、上記ペースト又はモル
タルが、セメント若しくはセメントを含む粉体混合物10
0重量部、細骨材0〜300重量部、減水剤若しくはＡＥ減
水剤0.1〜3.0重量部（固形分換算）、水20〜40重量部を
含むことを特徴とする透水性コンクリートである（請求
項１）。That is, according to the present invention, a kneaded product of a composition comprising coarse aggregate and a paste or mortar having a volume ratio of 30 to 80% with respect to the coarse aggregate is put into a mold, molded and cured. Wherein the paste or mortar is cement or a powder mixture 10 containing cement.
0 to 300 parts by weight of fine aggregate, 0.1 to 3.0 parts by weight of water reducing agent or AE water reducing agent (in terms of solid content), and 20 to 40 parts by weight of water. Item 1).
【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。本発明の透水性コンクリートを構成する材料及び
その配合割合は、次の通りである。 （１）粗骨材 粗骨材としては、粒径2.5〜20mmの砂利、砕石、又はこ
れらの混合物や、軽量骨材が挙げられる。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The materials constituting the permeable concrete of the present invention and the compounding ratio thereof are as follows. (1) Coarse Aggregate The coarse aggregate includes gravel, crushed stone, a mixture thereof, and lightweight aggregate having a particle size of 2.5 to 20 mm.
【０００８】（２）セメント若しくはセメントを含む粉
体混合物 セメントとしては、普通、早強、中庸熱、低熱ポルトラ
ンドセメント等のポルトランドセメントや、ホワイトセ
メント、アルミナセメント、さらには都市ゴミ焼却灰・
下水汚泥焼却灰等の廃棄物を原料として利用したエコセ
メントが挙げられる。セメントを含む粉体混合物は、前
記セメントに、ブレーン比表面積が3000cm2/g以上の高
炉スラグ粉末、フライアッシュ、石灰石粉末、珪石粉
末、シリカフューム等の無機質粉末を添加してなるもの
をいう。該無機質粉末としては、透水性コンクリートの
圧縮強度等から、高炉スラグ粉末、フライアッシュ及び
／又はシリカフュームが好ましい。なお、セメントを含
む粉体混合物中に占めるセメントの割合は、70重量％以
上とすることが好ましい。本発明においては、セメント
として、普通ポルトランドセメント又は早強ポルトラン
ドセメントを使用することは、早期強度発現性が向上す
るので、好ましいものである。[0008] (2) Cement or powder mixture containing cement As cement, Portland cement such as Portland cement such as ordinary, fast, medium heat and low heat, white cement, alumina cement, and municipal waste incineration ash
Ecocement using waste such as sewage sludge incineration ash as a raw material can be mentioned. The powder mixture containing cement refers to a cement mixture obtained by adding an inorganic powder such as blast furnace slag powder, fly ash, limestone powder, silica stone powder, silica fume or the like having a Blaine specific surface area of 3000 cm 2 / g or more to the cement. As the inorganic powder, blast furnace slag powder, fly ash and / or silica fume are preferable from the viewpoint of compressive strength of permeable concrete. The proportion of cement in the powder mixture containing cement is preferably 70% by weight or more. In the present invention, it is preferable to use ordinary Portland cement or early-strength Portland cement as cement, since the early strength development is improved.
【０００９】（３）細骨材 細骨材としては、川砂、海砂、山砂、砕砂、又はこれら
の混合物が挙げられる。細骨材としては、粗骨材の粒径
が5mm以上の場合は、粒径5mm未満、好ましくは2.5mm以
下、より好ましくは1.0mm以下の粒体が用いられ、粗骨
材の粒径が2.5〜5mmの場合は、粒径2.5mm未満、好まし
くは1.5mm以下、より好ましくは0.5mm以下の粒体が用い
られる。細骨材の粒径が粗骨材の粒径に近すぎると、粗
骨材にモルタルが被覆されにくくなり、好ましくない。(3) Fine aggregate Fine sand includes river sand, sea sand, mountain sand, crushed sand, or a mixture thereof. As the fine aggregate, when the particle size of the coarse aggregate is 5 mm or more, a particle having a particle size of less than 5 mm, preferably 2.5 mm or less, more preferably 1.0 mm or less is used. In the case of 2.5 to 5 mm, particles having a particle size of less than 2.5 mm, preferably 1.5 mm or less, more preferably 0.5 mm or less are used. If the particle size of the fine aggregate is too close to the particle size of the coarse aggregate, it becomes difficult to coat the mortar on the coarse aggregate, which is not preferable.
【００１０】細骨材の添加量は、セメント若しくはセメ
ントを含む粉体混合物100重量部に対して、0〜300重量
部であり、好ましくは30〜150重量部である。細骨材を
添加することにより、硬化後の乾燥による収縮を抑制す
ることができる。細骨材の添加量が300重量部を超える
と、混練物の作業性が低く成形等の作業に手間がかかる
うえ、透水性コンクリートの透水係数が小さくなり好ま
しくない。The amount of the fine aggregate is 0 to 300 parts by weight, preferably 30 to 150 parts by weight, based on 100 parts by weight of the cement or the powder mixture containing the cement. By adding fine aggregate, shrinkage due to drying after curing can be suppressed. If the amount of the fine aggregate exceeds 300 parts by weight, the workability of the kneaded material is low, and the work such as molding is troublesome, and the water permeability of the permeable concrete is undesirably small.
【００１１】（４）水 水の量は、セメント若しくはセメントを含む粉体混合物
100重量部に対して、20〜40重量部であり、混練物の作
業性や透水性コンクリートの透水係数及び圧縮強度か
ら、好ましくは25〜40重量部、より好ましくは30重量部
を超え40重量部以下である。水の量が、20重量部未満で
は、ペースト又はモルタルの粘性が高くなり、混練物の
作業性が低く成形等の作業に手間がかかる（例えば、振
動時間が長くなる等）ので好ましくない。水の量が40重
量部を超えると、振動成形時にペースト又はモルタルの
流れ落ちが起きやすく、透水係数が小さくなるので好ま
しくない。(4) Water The amount of water may be cement or a powder mixture containing cement.
20 to 40 parts by weight, based on 100 parts by weight, from the workability of the kneaded material and the water permeability and compressive strength of the permeable concrete, preferably 25 to 40 parts by weight, more preferably more than 30 parts by weight and more than 40 parts by weight Part or less. If the amount of water is less than 20 parts by weight, the viscosity of the paste or mortar becomes high, the workability of the kneaded material is low, and the work such as molding is troublesome (for example, the vibration time becomes long), which is not preferable. If the amount of water exceeds 40 parts by weight, the paste or mortar tends to run off during vibration molding, and the water permeability is undesirably reduced.
【００１２】（５）減水剤若しくはＡＥ減水剤 本発明においては減水剤若しくはＡＥ減水剤を使用す
る。該減水剤若しくはＡＥ減水剤を使用することによ
り、混練物の作業性が向上し成形等の作業が容易にな
り、液体高性能減水剤を使用した場合よりも振動時間を
短くすることができる。減水剤若しくはＡＥ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
系の減水剤、ＡＥ減水剤があげられる。なお、減水剤若
しくはＡＥ減水剤は、液状又は粉末状どちらでも使用可
能である。(5) Water reducing agent or AE water reducing agent In the present invention, a water reducing agent or an AE water reducing agent is used. By using the water reducing agent or the AE water reducing agent, the workability of the kneaded material is improved, the work such as molding is facilitated, and the vibration time can be shortened as compared with the case where a liquid high-performance water reducing agent is used. Examples of the water reducing agent or AE water reducing agent include lignin-based, naphthalene sulfonic acid-based, melamine-based water reducing agents, and AE water reducing agents. The water reducing agent or the AE water reducing agent can be used in either liquid or powder form.
【００１３】減水剤若しくはＡＥ減水剤の添加量は、セ
メント若しくはセメントを含む粉体混合物100重量部に
対して固形分換算で0.1〜3.0重量部であり、混練物の作
業性やコスト等から、好ましくは0.5〜2.0重量部であ
る。添加量が固形分換算で0.1重量部未満では、ペース
ト又はモルタルの粘性が高くなり、混練物の作業性が低
く成形等の作業に手間がかかる（例えば、振動時間が長
くなる等）ので好ましくない。一方、3.0重量部を超え
る量を添加しても混練物の作業性はほとんど向上せず、
コストが高くなる。また、減水剤若しくはＡＥ減水剤の
添加量が多すぎると、振動成形時にペースト又はモルタ
ルの流れ落ちが起きやすく、透水係数が小さくなるので
好ましくない。The amount of the water reducing agent or the AE water reducing agent is 0.1 to 3.0 parts by weight in terms of solid content based on 100 parts by weight of cement or a powder mixture containing cement. Preferably it is 0.5 to 2.0 parts by weight. If the addition amount is less than 0.1 part by weight in terms of solid content, the viscosity of the paste or mortar becomes high, the workability of the kneaded material is low, and the work such as molding takes time (for example, the vibration time becomes long), which is not preferable. . On the other hand, even if an amount exceeding 3.0 parts by weight is added, the workability of the kneaded material hardly improves,
The cost increases. On the other hand, if the amount of the water reducing agent or the AE water reducing agent is too large, the paste or mortar tends to run off during vibration molding, and the water permeability is undesirably reduced.
【００１４】（６）粗骨材に対するペースト又はモルタ
ルの容積比 粗骨材に対するペースト又はモルタルの容積比は、粗骨
材100％に対して30〜80％（外割）であり、透水性コン
クリートの透水係数及び圧縮強度や、コスト等から、好
ましくは35〜55％（外割）である。ペースト又はモルタ
ルの容積比が30％未満では、透水性コンクリートの強度
が低下するので好ましくない。ペースト又はモルタルの
容積比が80％を超えると、透水係数が小さくなるので好
ましくない。(6) Volume ratio of paste or mortar to coarse aggregate The volume ratio of paste or mortar to coarse aggregate is 30 to 80% (outside ratio) to 100% of coarse aggregate. From the viewpoints of water permeability, compressive strength, cost, etc., it is preferably 35 to 55% (outside ratio). If the volume ratio of the paste or the mortar is less than 30%, the strength of the permeable concrete decreases, which is not preferable. If the volume ratio of the paste or mortar exceeds 80%, the water permeability is undesirably reduced.
【００１５】混練に用いるミキサは、特に限定するもの
ではなく、パンタイプミキサ、二軸ミキサ等の慣用のミ
キサで混練すれば良い。混練方法としては、材料を一括
してミキサに投入して１分以上混練する方法や、水、減
水剤若しくはＡＥ減水剤以外の材料をミキサに投入して
空練りした後に、水、減水剤若しくはＡＥ減水剤を投入
して１分以上混練する方法等が挙げられる。なお、混練
は、粗骨材に粗骨材以外の材料からなるペースト又はモ
ルタルが被覆した状態の互いに独立した粒体が調製され
るまで混練する。The mixer used for kneading is not particularly limited, and may be kneaded with a conventional mixer such as a pan-type mixer or a twin-screw mixer. As a kneading method, a method in which materials are collectively charged into a mixer and kneaded for 1 minute or more, or a material other than water, a water reducing agent or an AE water reducing agent is charged into the mixer and kneaded, and then water, a water reducing agent or A method in which the AE water reducing agent is charged and kneaded for 1 minute or more can be used. In the kneading, kneading is performed until individual particles in a state where the coarse aggregate is covered with a paste or mortar made of a material other than the coarse aggregate are prepared.
【００１６】混練後、該混練物（粗骨材に粗骨材以外の
材料からなるペースト又はモルタルが被覆した状態の互
いに独立した粒体）を所定の型枠に投入し、好ましくは
3000〜8000vpmの振動数の外部振動で振動成形する。振
動数が3000vpm未満では、充分な締め固めを行うことが
できないおそれがあり、強度が低下するおそれがある。
振動数が8000vpmを超えると、透水係数が小さくなるお
それがある。外部振動は、テーブルバイブレーターや型
枠に取り付け可能な振動機等を使用することができる。
振動時間は、おおよそ3〜20秒である。また、振動成形
時に、1〜100kPaの圧力を加えることは、差し支えな
い。加圧には、油圧式あるいは空気圧式の加圧装置等を
使用することができる。After kneading, the kneaded material (independent granules in which coarse aggregate is covered with a paste or mortar made of a material other than coarse aggregate) is poured into a predetermined mold, preferably
Vibration molding is performed with external vibration having a frequency of 3000 to 8000 vpm. If the frequency is less than 3000 vpm, there is a possibility that sufficient compaction may not be performed, and the strength may be reduced.
If the frequency exceeds 8000 vpm, the permeability may decrease. For external vibration, a table vibrator, a vibrator that can be attached to a mold, or the like can be used.
Vibration time is approximately 3 to 20 seconds. In addition, applying a pressure of 1 to 100 kPa at the time of vibration molding may be used. For the pressurization, a hydraulic or pneumatic pressurizing device or the like can be used.
【００１７】なお、本発明においては、目的を損なわな
い範囲で、ペースト又はモルタルに、エチレン・酢酸ビ
ニル系共重合体、アクリル系共重合体等のポリマーを添
加することは差し支えない。また、目的を損なわない範
囲で、ベンガラ等の顔料を添加することも差し支えな
い。In the present invention, a polymer such as an ethylene / vinyl acetate copolymer or an acrylic copolymer may be added to the paste or mortar as long as the purpose is not impaired. Further, a pigment such as red iron oxide may be added as long as the purpose is not impaired.
【００１８】[0018]
【実施例】以下、実施例により本発明を説明する。 １．使用材料 以下に示す材料を使用した。 １）セメント；普通ポルトランドセメント（太平洋セメ
ント（株）製） ２）高炉スラグ；ファインセラメント10A（第一セメン
ト（株）製） ３）ＡＥ減水剤（液体）；「ポゾリスNo.8」（商品名）
（（株）エヌエムビー製） ４）高性能減水剤（液体）；「マイティ150」（商品
名）（花王（株）製） ５）細骨材；市原産細目山砂（粒径2.5mm以下） ７）水；水道水The present invention will be described below with reference to examples. 1. Materials used The following materials were used. 1) Cement; ordinary Portland cement (manufactured by Taiheiyo Cement Co., Ltd.) 2) Blast furnace slag; fine cement 10A (manufactured by Daiichi Cement Co., Ltd.) 3) AE water reducing agent (liquid); "Pozzolith No. 8" (product) Name)
4) High performance water reducer (liquid); "Mighty 150" (trade name) (Kao Corporation) 5) Fine aggregate; Ichihara Hosomeyama sand (2.5 mm or less in particle size) 7) Water; tap water
【００１９】試験例1〜25 ２．透水性コンクリートの配合及び混練 前記材料を、表１に示す配合にしたがって２軸強制練り
ミキサ（0.1m3）に一括投入し、４分間混練し、混練物
（粗骨材に粗骨材以外の材料からなるペースト又はモル
タルが被覆した状態の粒体）を調製した。Test Examples 1 to 25 2. The blending and kneading the material of permeable concrete, collectively put into biaxial forced kneading mixer according to the formulations shown in Table 1 (0.1 m 3), and kneaded for 4 minutes, the kneaded product (the coarse aggregate than coarse aggregate (Granules coated with a paste or mortar made of a material).
【００２０】[0020]
【表１】 [Table 1]
【００２１】３．評価 （１）圧縮強度 各混練物を、φ10×20cmの型枠に投入し、空隙率が25％
となるようにテーブルバイブレーターで振動成形（振動
数4500vpm）した。成形後、20℃で２時間前置き後、65
℃で４時間蒸気養生した。脱型後、20℃で14日間水中養
生し、透水性コンクリート供試体を作製した。該供試体
の圧縮強度を「JIS A 1108（コンクリートの圧縮試験方
法）」に準じて測定した。 （２）透水係数 各混練物を、10×10×40cmの型枠に投入し、空隙率が25
％となるようにテーブルバイブレーターで振動成形（振
動数4500vpm）した。成形後、20℃で２時間前置き後、6
5℃で４時間蒸気養生した。脱型後、20℃で14日間水中
養生し、透水性コンクリート供試体を作製した。該供試
体の透水係数を「インターロッキングブロック舗装設計
施工要領 8-3 透水性試験」に準じて測定した。 （３）混練物の作業性及び振動時間 上記（１）及び（２）において、各混練物を型枠に投入
する際の作業性を「◎；非常に良好」、「○；良好」、
「×；悪い」で評価した。また、一部の混練物に対して
は、上記（１）において振動成形（振動数4500vpm）す
る際、所定の空隙率（25％）となるまでの振動時間を測
定した。振動時間は、φ10×20cmの型枠に混練物を3.3k
g投入し、空隙率が25％となるまでの振動時間を測定し
た。それらの結果を表２に示す。3. Evaluation (1) Compressive strength Each kneaded material was put into a φ10 × 20 cm formwork, and the porosity was 25%.
Vibration molding (vibration frequency 4500 vpm) with a table vibrator so that After molding, pre-place at 20 ° C for 2 hours, 65
Steam cured at 4 ° C. for 4 hours. After demolding, the specimen was cured in water at 20 ° C. for 14 days to prepare a permeable concrete specimen. The compressive strength of the test specimen was measured according to "JIS A 1108 (Method for testing compression of concrete)". (2) Permeability coefficient Each kneaded material is put into a 10 × 10 × 40 cm formwork, and the porosity is 25%.
% By vibration shaping (frequency: 4500 vpm) using a table vibrator. After molding, pre-place at 20 ° C for 2 hours,
Steam curing was performed at 5 ° C. for 4 hours. After demolding, the specimen was cured in water at 20 ° C. for 14 days to prepare a permeable concrete specimen. The permeability of the specimen was measured according to “Interlocking Block Pavement Design and Construction Procedure 8-3 Permeability Test”. (3) Workability and vibration time of kneaded material In the above (1) and (2), the workability at the time of putting each kneaded material into a mold was evaluated as “◎: very good”, “○: good”,
The evaluation was “x; bad”. Further, when a part of the kneaded material was subjected to the vibration molding (frequency of 4500 vpm) in the above (1), the vibration time until a predetermined porosity (25%) was measured. Vibration time is 3.3k for the kneaded material in a φ10 × 20cm mold.
g, and the vibration time until the porosity became 25% was measured. Table 2 shows the results.
【００２２】[0022]
【表２】 [Table 2]
【００２３】表２から、本発明で規定する透水性コンク
リートは、 １）粗骨材として5号砕石（粒径13〜20mm）を使用した
場合、透水係数が7.0〜10.0cm/sec程度で、圧縮強度が1
5〜20N/mm2程度（試験例１〜12） ２）粗骨材として7号砕石（粒径2.5〜5.0mm）を使用し
た場合、透水係数が1.0〜1.3cm/sec程度で、圧縮強度が
23〜25N/mm2程度（試験例13〜15） と、大きな透水係数及び圧縮強度を有するうえ、混練物
の作業性も良好で、成形等の作業が容易であり、所定の
空隙率となるまでの振動時間も短いことがわかる。一
方、本発明で規定する配合割合から外れる透水性コンク
リート（試験例16〜22）では、粗骨材として同じ5号砕
石を使用した試験例１〜12の透水性コンクリートと比べ
て圧縮強度や透水係数が低かった。さらに、高性能減水
剤を使用した試験例23〜25の透水性コンクリートでは、
混練物の作業性が劣るうえ、所定の空隙率となるまでの
振動時間も長かった。From Table 2, the permeable concrete specified by the present invention is as follows: 1) When crushed stone No. 5 (particle size: 13-20 mm) is used as coarse aggregate, the permeable concrete has a permeability coefficient of about 7.0-1.0 cm / sec. Compressive strength is 1
5~20N / mm 2 approximately (Test Example 1-12) 2) When using the No. 7 crushed stone as coarse aggregate (particle size 2.5 to 5.0 mm), hydraulic conductivity of about 1.0~1.3cm / sec, compressive strength But
Approximately 23 to 25 N / mm 2 (Test Examples 13 to 15) With high water permeability and compressive strength, the workability of the kneaded material is good, the work such as molding is easy, and the predetermined porosity is obtained. It can be seen that the vibration time until is short. On the other hand, in the case of the permeable concrete (Test Examples 16 to 22) which deviates from the mixing ratio specified in the present invention, the compressive strength and the water permeability of the permeable concrete of Test Examples 1 to 12 using the same crushed stone as coarse aggregate are compared. The coefficient was low. Furthermore, in the permeable concrete of Test Examples 23 to 25 using a high performance water reducing agent,
The workability of the kneaded material was inferior, and the vibration time required to reach a predetermined porosity was long.
【００２４】[0024]
【発明の効果】以上説明したように、本発明の透水性コ
ンクリートは、大きな透水係数及び圧縮強度を有するも
のであり、道路舗装、道路の側壁、河川の護岸等の種々
の用途に用いることができる。また、本発明の透水性コ
ンクリートでは、混練物の作業性が良好であり成形等の
作業も容易である。したがって、本発明の透水性コンク
リートでは、透水性コンクリート製品の製造の効率を向
上させることができる。As described above, the permeable concrete of the present invention has a large water permeability and compressive strength, and can be used for various applications such as road pavement, road side walls, and river bank protection. it can. Moreover, in the water-permeable concrete of the present invention, the workability of the kneaded material is good, and the work such as molding is easy. Therefore, in the permeable concrete of the present invention, the efficiency of the production of the permeable concrete product can be improved.
───────────────────────────────────────────────────── 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 7:19 Ｃ０４Ｂ 111:40 7:26） Ｂ２８Ｂ 1/08 Ｂ 111:40 (72)発明者 佐藤 達三 千葉県佐倉市大作２−４−２ 太平洋セメ ント株式会社中央研究所内 Ｆターム(参考） 2D018 DA00 2D051 AA02 AD01 AD07 AF01 AF02 AF04 AF05 AF09 AG15 AG17 AG20 AH03 EA06 EB06 EB07 4G012 PA03 PA04 PB25 PB26 PC11 PC12 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C04B 7:19 C04B 111: 40 7:26) B28B 1/08 B 111: 40 (72) Inventor Tatsuzo Sato 2-4-2 Daisaku, Sakura City, Chiba Pref. F-term in Central Research Institute Co., Ltd. F-term (reference) 2D018 DA00 2D051 AA02 AD01 AD07 AF01 AF02 AF04 AF05 AF09 AG15 AG17 AG20 AH03 EA06 EB06 EB07 4G012 PA03 PA04 PB25 PB26 PC11 PC12
Claims (2)
〜80％のペースト又はモルタルとからなる組成物の混練
物を型枠に投入して成形し、養生してなる透水性コンク
リートであって、 上記ペースト又はモルタルが、セメント若しくはセメン
トを含む粉体混合物100重量部、細骨材0〜300重量部、
減水剤若しくはＡＥ減水剤0.1〜3.0重量部（固形分換
算）、水20〜40重量部を含むことを特徴とする透水性コ
ンクリート。1. The method of claim 1, wherein the volume ratio of the coarse aggregate to the coarse aggregate is 30
A kneaded product of a composition comprising 〜80% paste or mortar, which is poured into a mold, molded and cured, wherein the paste or mortar is cement or a powder mixture containing cement. 100 parts by weight, fine aggregate 0-300 parts by weight,
A water-permeable concrete comprising 0.1 to 3.0 parts by weight (in terms of solid content) of a water reducing agent or an AE water reducing agent, and 20 to 40 parts by weight of water.
体混合物が、70〜100重量％のポルトランドセメント
と、30〜0重量％の高炉スラグ粉末、フライアッシュ、
シリカフュームから選ばれる１種以上の粉末からなる請
求項１に記載の透水性コンクリート。2. The cement or a powder mixture containing cement, comprising 70-100% by weight of Portland cement, 30-0% by weight of blast furnace slag powder, fly ash,
The permeable concrete according to claim 1, comprising one or more powders selected from silica fume.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008025133A (en) * | 2006-07-19 | 2008-02-07 | Shozo Furusawa | Method for laying block such as tetrapod |
| JP2008120628A (en) * | 2006-11-10 | 2008-05-29 | Wako Concrete Kogyo Kk | Method of manufacturing porous concrete block and porous concrete block manufactured by this method |
| FR2964379A1 (en) * | 2010-09-02 | 2012-03-09 | Lafarge Sa | PERMEABLE CONCRETE WITH LOW CO2 COST AND HOMOGENEOUS LOOK |
| JP2015048641A (en) * | 2013-09-02 | 2015-03-16 | 清水建設株式会社 | Liquefaction countermeasure structure of structure |
| JP2015140274A (en) * | 2014-01-28 | 2015-08-03 | 太平洋セメント株式会社 | Production method of cast-in-place porous concrete |
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| CN115196920A (en) * | 2022-07-12 | 2022-10-18 | 湖北省成美建材股份有限公司 | Preparation method of concrete with high compression-resistant structure |
| CN115286313A (en) * | 2022-07-20 | 2022-11-04 | 泸州临港思源混凝土有限公司 | High-strength sand-free concrete and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008025133A (en) * | 2006-07-19 | 2008-02-07 | Shozo Furusawa | Method for laying block such as tetrapod |
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| EP2935147A1 (en) * | 2012-12-21 | 2015-10-28 | Hanson Aggregates, LLC | Fast-curing pervious concrete mix |
| EP2935147A4 (en) * | 2012-12-21 | 2016-09-07 | Hanson Aggregates LLC | Fast-curing pervious concrete mix |
| JP2015048641A (en) * | 2013-09-02 | 2015-03-16 | 清水建設株式会社 | Liquefaction countermeasure structure of structure |
| JP2015140274A (en) * | 2014-01-28 | 2015-08-03 | 太平洋セメント株式会社 | Production method of cast-in-place porous concrete |
| CN105293988A (en) * | 2015-11-26 | 2016-02-03 | 中铁建设集团有限公司 | Modified admixture for cement-based pervious concrete and preparation method of modified admixture |
| CN106186795A (en) * | 2016-07-08 | 2016-12-07 | 江苏苏博特新材料股份有限公司 | A kind of pervious concrete special additive and application thereof |
| CN113981764A (en) * | 2021-10-28 | 2022-01-28 | 福建省兴岩建设集团有限公司 | Construction method of pervious concrete pavement engineering |
| CN115196920A (en) * | 2022-07-12 | 2022-10-18 | 湖北省成美建材股份有限公司 | Preparation method of concrete with high compression-resistant structure |
| CN115286313A (en) * | 2022-07-20 | 2022-11-04 | 泸州临港思源混凝土有限公司 | High-strength sand-free concrete and preparation method thereof |
| CN115490465A (en) * | 2022-09-20 | 2022-12-20 | 武汉昌华汇鑫建材有限公司 | High-strength high-water-permeability concrete and preparation method thereof |
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