JP4138398B2 - Concrete pavement and concrete block with water retention function - Google Patents
Concrete pavement and concrete block with water retention function Download PDFInfo
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- JP4138398B2 JP4138398B2 JP2002240366A JP2002240366A JP4138398B2 JP 4138398 B2 JP4138398 B2 JP 4138398B2 JP 2002240366 A JP2002240366 A JP 2002240366A JP 2002240366 A JP2002240366 A JP 2002240366A JP 4138398 B2 JP4138398 B2 JP 4138398B2
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- 239000004567 concrete Substances 0.000 title claims description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 239000004568 cement Substances 0.000 claims description 21
- 239000002893 slag Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 13
- 239000000839 emulsion Substances 0.000 claims description 11
- 229920000642 polymer Polymers 0.000 claims description 10
- 229920003086 cellulose ether Polymers 0.000 claims description 9
- 239000010455 vermiculite Substances 0.000 claims description 6
- 229910052902 vermiculite Inorganic materials 0.000 claims description 6
- 235000019354 vermiculite Nutrition 0.000 claims description 6
- 210000000988 bone and bone Anatomy 0.000 claims 2
- 238000000465 moulding Methods 0.000 claims 1
- 239000002023 wood Substances 0.000 claims 1
- 239000012615 aggregate Substances 0.000 description 21
- 206010016807 Fluid retention Diseases 0.000 description 15
- 239000010410 layer Substances 0.000 description 13
- 239000004576 sand Substances 0.000 description 12
- 239000000047 product Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000002344 surface layer Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000035699 permeability Effects 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000010583 slow cooling Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Images
Classifications
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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
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
- C04B5/06—Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag
- C04B5/065—Porous slag
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
-
- 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
- C04B20/1088—Water
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/46—Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Road Paving Structures (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、太陽熱の蓄熱により歩道、道路、公園、駐車場等の舗装表面温度が上昇する事を防ぐ方法に関する。
【０００２】
【従来の技術】
アスファルトやコンクリートなどの舗装道路による太陽熱の蓄熱は夏季においては舗装面が温度上昇し６０℃近くまで上昇する。特に大都市部ではビルの乱立により舗装面の割合が高く、また緑化不足のため都市部のヒートアイランド現象が起きている。そこで近年、舗装部の温度を下げる方法として微細な空隙を有するセラミック板を舗装部へ使用する方法があるがセラミック板の耐久性、施工性及びコスト面で問題がある。また既設のアスファルトやコンクリート舗装部へセメントと吸水性樹脂をスラリー状にして浸透させる方法があるが保水性能が低い。
【０００３】
【発明が解決しようとする課題】
本発明は舗装道路の温度を下げ、しかも安価な保水機能を有するコンクリート舗装及びコンクリートブロックを提供する。
【０００４】
さらに、コンクリートブロックの平坦度確保と安定性の目的で自然砂を敷砂として使用しているものに替え保水機能と水硬性を有し、しかも締め固めに優れた敷き砂を提供する。
【０００５】
【課題を解決する手段】
本発明の舗装道路の温度上昇を防ぐ方法のコンクリート舗装は次の様な構成とする。すなわちこの発明に使用するコンクリート舗装の骨材は、多孔質で強度があり微小孔隙が多くあり、透水性が高い特性を持った高炉水砕軟質スラグと高炉徐冷スラグを粒度調整し適量混ぜ、これに保水性が高いバーミキュライト（蛭石）を加えたものとする。この骨材へバインダーとしてセメントとポリマーエマルジョン樹脂を加え、さらにセメントの水和反応に必要な水の保水を高めるためセルロースエーテルを添加すると共にコンクリート舗装は空隙率が５〜２０容積％に加工する事を特徴とする。この構成によるとコンクリート舗装は、雨水の浸透がコンクリートへすみやかに浸透し、浸透した水分が多孔質で微小孔隙が多数ある高炉水砕軟質スラグ及び高炉徐冷スラグに吸水及び保水され、また保水力が高いバーミキュライト（蛭石）骨材と相俟って保水される為、長時間コンクリート舗装へ水分が保持される。よって、太陽熱によりコンクリート舗装の温度上昇が起きてくる場合、保水された水分が徐々に気化されるため舗装部は長期間低温状態に維持される。また透水性は、骨材の粒度調整と水の比率を調整すれば所定の透水性能が確保されて雨水がコンクリート舗装内部へ浸透され、保水に必要な水はコンクリート舗装部へ補給され、それ以外は地下へ浸透されるため保水効率の良い構造となる。
【０００６】
コンクリートブロックにて舗装する場合、前述の骨材の高炉水砕軟質スラグを粒度調整しコンクリートブロックの敷き砂代替として使用すれば前述のコンクリートブロック及び敷き砂の両効果によりさらに保水効果が向上する。
【０００７】
【発明の実施の形態】
以下、詳細に本発明を説明する。本発明で請求項１に記載のコンクリート舗装へ使用する材料は、骨材、セメント、ポリマーエマルジョン、セルロースエーテル及び水とからなる混合物で、必要により顔料又は化粧骨材を入れる。骨材は多孔質で強度があり微小孔隙に雨水等が吸水し易い構造をしている高炉水砕軟質スラグで粒度０．１５〜２．３６ｍｍを４３〜６０重量％と高炉徐冷スラグで粒度１．２〜４．７５ｍｍを１３〜３０重量％に、保水力が高いバーミキュライト（蛭石）０．１５〜２．３６ｍｍを０．３〜３．０重量％を混合したものを使用する。セメントは普通ポルトランドセメント、高炉セメント及び白色ポルトランドセメントのいずれかを２０〜２５重量％とする。セメント量が２５重量％を超えると骨材が保有している微小孔隙をセメントで覆い骨材へ侵入する雨水を遮断しコンクリート舗装の保水性が低下する。ポリマーエマルジョンはコンクリートの増粘性を向上し、骨材へセメントペーストが付着しコンクリート強度を向上さす為に、スチレン・アクリル共重合エマルジョン（クラリアントポリマー株式会社製：モビニールＬＤＭ６８８０）又はアクリル系エマルジョン（旭化成：Ａ−１５００）をセメント比２重量％添加する。また骨材自体が吸収性のよい材料を選定している為、コンクリートの水和反応に使用される水が骨材へ吸収され水和反応に必要な水不足を防止する目的としてセメント水の保水力が高いセルロースエーテルをセメント比０．４重量％添加する。水和反応に必要な水はセメント比４０〜４４重量％とする。水はコンクリート舗装の強度と透水性に影響し、水が少ないと強度が落ち、多すぎると透水性が落ちそれに伴い保水性も落ちる。製造方法は図５に示すコンクリート舗装の製造工程に示す方法で製造する。まず骨材、セメント、セルロースエーテルを混練ミキサーへ入れ空練りを約２分間行い、その後水及びポリマーエマルジョンを入れ約３分間混練し所定の現場へコンクリートを打ち込む。養生は自然乾燥で４週間経過すれば所定の強度が出る。
【０００８】
請求項２に記載のコンクリートブロックへ使用される材料は、請求項１で使用する材料と同じものを使用する。ただしコンクリートブロックへ着色する場合は顔料をセメント比１〜５重量％添加する。化粧骨材は化粧表面の発色程度により適量混合する。またコンクリートブロックの表面へ美装性を向上させる為に表面加工としてショットブラスト、研磨、洗い出し等の加工を加える事も可能である。２層型コンクリートブロックの製造方法は図４に示す方法で製造する。まず表層部の骨材、セメント、セルロースエーテルを混練ミキサーへいれ空練を約２分間行う。このとき表層部へ着色したい場合は、顔料や化粧骨材を適量混ぜる。その後、水とポリマーエマルジョンをいれ約３分間混練し型枠へ定量充填し４０００〜８０００ｒｐｍの振動をあたえる。次に基層部の骨材、セメント、セルロースエーテル、を混練ミキサーへ入れ空練り約２分間行い、その後、水とポリマーエマルジョンを入れ約３分間混練する。混練された基層材は、型枠へすでに充填されている表層材の上に定量充填し４０００〜８０００ｒｐｍの振動を与えた後、プレス加圧し所定の製品厚みに仕上げる。成型された製品は型枠より即脱され養生加工後表面の仕上げ加工を行う。コンクリートブロック表面の仕上げ加工は洗い出し仕上げ、研磨仕上げ及びショットブラスト仕上げを行うが仕上げ加工を省略しても良い。
【０００９】
また、１層型コンクリートブロックは２層型コンクリートブロックの基層部を無くし全てを表層部で製造したものである。
【００１０】
コンクリート舗装及びコンクリートブロックにおいて、表面の耐磨耗性をさらに高めるため表層部と基層部の２層構造とし、表層部の骨材へは硅石等の耐磨耗性が高くしかも熱伝導率が低い材料を使用し他は請求項１，２に示す材料で製造すると、表面の耐磨耗性が向上し太陽熱がコンクリート表面へ輻射されても熱が伝わりにくく、また基層部に保水された水分が気化され表面の骨材を冷やし低温化がはかれる。
【００１１】
敷き砂へ使用される材料は、高炉水砕軟質スラグで粒度０．１５〜０．３ｍｍを５０重量％と粒度１．２〜２．３６ｍｍを５０重量％混合した敷き砂。
【００１２】
【実施例】
以下、実施例について説明する。実施例では請求項２に示すコンクリートブロックを作成した。材料は表１に示すものを使用し、材料の配合割合は表２に示すＮＯ１コンクリート舗装Ａ、ＮＯ２コンクリート舗装Ｂ、コンクリートブロックＡ、及びコンクリートブロックＢの４種類でサイズは２００ｘ１００ｘ６０ｍｍとした。製造方法は図４に示す２層型コンクリートブロックの製造工程に示す方法と表層部のみの配合で基層部の配合が無い１層型コンクリートブロックとした。
【００１３】
【表１】
【発明の効果】
コンクリートブロックの吸水性、保水性、断熱性機能を測定するため試験体を以下に示す方法にて試験を行った。
【００１５】
試験体は前述のＮＯ１〜ＮＯ４コンクリートブロックと従来のコンクリート製のインターロッキングブロックについて比較試験した。試験方法は、試験体を加熱炉で８０℃ｘ８時間乾燥し製品重量（ｗ１）を測定する。次に水槽へ１２時間浸漬し水槽より取りだし３０分間自然乾燥後製品重量（ｗ２）を測定する。その後、施工現場を想定した状態にして（製品の表面のみ大気とふれる状態で他の面は砂に埋もれた状態）炉内にて加熱した。炉内温度は８０℃ｘ１０時間加熱し１時間ごとの製品表面温度測定と８０℃ｘ１０時間後の製品重量（ｗ３）を測定した。その結果、表３に示す様に従来のインターロッキングブロックに比べ本発明のコンクリートブロックは約５〜７℃の温度低下が確認された。また夏季に屋外へ放置し１時間ごとの製品表面温度を測定したが、同様に従来のインターロッキングブロックに比べ約６〜８℃の温度低下効果が確認された。また保水率及び吸水率は表４に示す様に従来品と比較し大巾に高い数値を示しているため太陽熱の蓄積をコンクリートブロックへ受けた場合は長時間に渡り水分が気化し低温化がはかれる。この効果はコンクリートへ使用している骨材が、多数の微細孔隙を保有している為そこに雨水等が吸水及び保水し、保水力が高いバーミキュライトと相俟って保水性能が高まる。しかも連続空隙を持った構造となっているためたやすく吸水出来る結果である。
【００１６】
試験体の曲げ試験はＪＡＳＳ７ Ｍ−１０１に従った試験方法で試験体ＮＯ１〜４の曲げ強度を測定した。その結果は、６．１〜６．５Ｎ/ｍｍ2でインターロッキングブロックの規定値４．９Ｎ/ｍｍ2以上を満足していた。透水係数は０．３〜０．６ｃｍ/ｓで（社）日本道路建設業協会が規定している０．１ｃｍ/ｓ以上を満足している。
【００１７】
【表３】
敷き砂は保水性能が優れていることは前述で示されているが、修正ＣＢＲ値を測定すると従来品の敷き砂の修正ＣＢＲ値は１０〜２５に対し本発明の敷き砂は９０〜１００になり非常に大きな効果がある。これはスラグの形状が角ばっている為、クサビ状になっていることと、スラグの粒度が大きいスラグ１．２〜２．５ｍｍの間に小さいスラグ０．１５〜０．３ｍｍが入り、締め固め性が向上した結果である。またスラグは水硬性を保有している為、施工後水分を吸水すると硬化する為、コンクリートブロックが安定する。しかも雨水侵入による敷き砂の移動もなくコンクリートブロックの敷設が長期安定して固定される。
【図面の簡単な説明】
【図１】 コンクリートブロックの2層構造を説明する斜視図である。
【図２】 コンクリートブロックによる舗装の構成を説明する側面図である。
【図３】 コンクリート舗装の構造を模式的に示す部分断面図である。
【図４】 2層型コンクリートブロックの製造工程図を示す。
【図５】 コンクリート舗装の製造工程図を示す。
【符号の説明】
１ 表層部
２ 基層部
３ コンクリートブロック
４ 敷き砂
５ 路盤
６ 路床
７ 舗装
１０ 高炉徐冷スラグ
１１ 微小孔隙
１２ 高炉水砕軟質スラグ
１３ セメントペースト
１３ａ セメント
１３ｂ 水
１３ｃポリマーエマルジョン
１３ｄセルロースエーテル
１４ 連続空隙[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for preventing the temperature of pavement surfaces such as sidewalks, roads, parks, and parking lots from rising due to heat storage of solar heat.
[0002]
[Prior art]
The heat storage of solar heat from paved roads such as asphalt and concrete rises to near 60 ° C in the summer when the pavement surface rises in temperature. Particularly in large urban areas, the proportion of paved surfaces is high due to the erection of buildings, and the urban heat island phenomenon is occurring due to insufficient greening. Therefore, in recent years, there is a method of using a ceramic plate having fine voids in the pavement as a method of lowering the temperature of the pavement, but there are problems in terms of durability, workability and cost of the ceramic plate. In addition, there is a method in which cement and water-absorbing resin are permeated into existing asphalt or concrete pavement in a slurry state, but the water retention performance is low.
[0003]
[Problems to be solved by the invention]
The present invention provides a concrete pavement and a concrete block that lowers the temperature of a paved road and has an inexpensive water retention function.
[0004]
Furthermore, it provides a laying sand having a water retaining function and hydraulic property, which is excellent in compaction, instead of using natural sand as laying sand for the purpose of ensuring the flatness and stability of the concrete block.
[0005]
[Means for solving the problems]
The concrete pavement of the method for preventing temperature rise of the paved road according to the present invention has the following configuration. That is, the concrete pavement aggregate used in the present invention is porous, strong, has many fine pores, mixed with an appropriate amount of granulated blast furnace granulated soft slag and blast furnace annealed slag with high water permeability, Vermiculite (meteorite) with high water retention is added to this. Cement and polymer emulsion resin are added to this aggregate as a binder, and cellulose ether is added to increase the water retention required for the hydration reaction of the cement, and the concrete pavement is processed to a porosity of 5 to 20% by volume. It is characterized by. According to this structure, concrete pavement absorbs and retains water in the blast furnace granulated soft slag and blast furnace slow-cooled slag, in which rainwater permeates quickly into the concrete, and the permeated water is porous and has many micropores. Water is retained in combination with high vermiculite (meteorite) aggregate, so moisture is retained on the concrete pavement for a long time. Therefore, when the temperature of concrete pavement rises due to solar heat, the retained water is gradually vaporized, so that the pavement is maintained at a low temperature for a long period of time. In addition, the water permeability is adjusted by adjusting the aggregate particle size and the water ratio, ensuring the required water permeability, allowing rainwater to penetrate into the concrete pavement, and supplying the water necessary for water retention to the concrete pavement. Since it penetrates underground, it has a structure with good water retention efficiency.
[0006]
In the case of paving with a concrete block, if the particle size of the above-mentioned aggregate blast furnace granulated soft slag is adjusted and used as an alternative to the sand for the concrete block, the water retention effect is further improved by the effects of both the concrete block and the sand.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail. The material used for the concrete pavement according to the first aspect of the present invention is a mixture of aggregate, cement, polymer emulsion, cellulose ether and water, and if necessary, a pigment or a decorative aggregate. Aggregate is porous, strong, and has a structure in which fine water is easy to absorb rainwater etc. in the micropores. Granularity of 0.15 to 2.36mm is 43 to 60% by weight, and granulated with blast furnace slow cooling slag. A mixture of 1.2 to 4.75 mm with 13 to 30 wt% and vermiculite (meteorite) 0.15 to 2.36 mm with a high water holding capacity mixed with 0.3 to 3.0 wt% is used. As the cement, 20 to 25% by weight of ordinary Portland cement, blast furnace cement, and white Portland cement is used. When the amount of cement exceeds 25% by weight, the fine pores held in the aggregate are covered with cement to block rainwater that enters the aggregate, and the water retention of the concrete pavement decreases. In order to improve the viscosity of concrete and increase the concrete strength by adhering the cement paste to the aggregate, the polymer emulsion improves the strength of the concrete by using styrene / acrylic copolymer emulsion (manufactured by Clariant Polymer Co., Ltd .: Mobile LDM6880) or acrylic emulsion (Asahi Kasei: A-1500) is added at 2% by weight of cement. In addition, since the aggregate itself has selected a material with good absorbability, the water used for the hydration reaction of concrete is absorbed into the aggregate and the water retention capacity of cement water is used to prevent water shortage necessary for the hydration reaction. A cellulose ether having a high weight is added at a cement ratio of 0.4% by weight. Water required for the hydration reaction is 40 to 44% by weight of cement. Water affects the strength and water permeability of concrete pavement. If there is little water, strength will fall, and if too much, water permeability will fall and water retention will also fall. The manufacturing method is the method shown in the manufacturing process of concrete pavement shown in FIG. First, aggregate, cement and cellulose ether are put into a kneading mixer and kneaded for about 2 minutes, and then water and a polymer emulsion are added and kneaded for about 3 minutes, and concrete is poured into a predetermined site. The curing is naturally dry and the prescribed strength is achieved after 4 weeks.
[0008]
The material used for the concrete block according to
[0009]
In addition, the single-layer concrete block is obtained by eliminating the base layer portion of the two-layer concrete block and manufacturing the entire surface layer portion.
[0010]
In concrete pavements and concrete blocks, the surface layer and base layer have a two-layer structure to further improve the surface wear resistance, and the aggregate of the surface layer has high wear resistance such as meteorite and low thermal conductivity. When other materials are used and the materials shown in
[0011]
The material used for the laying sand is blast furnace granulated soft slag mixed with 50% by weight of 0.15-0.3 mm particle size and 50% by weight of 1.2-2.36 mm particle size.
[0012]
【Example】
Examples will be described below. In the examples, concrete blocks shown in
[0013]
[Table 1]
【The invention's effect】
In order to measure the water absorption, water retention, and heat insulating functions of the concrete block, the test specimens were tested by the following method.
[0015]
The test body was subjected to a comparative test on the above-described NO1-NO4 concrete block and a conventional concrete interlocking block. In the test method, the specimen is dried in a heating furnace at 80 ° C. for 8 hours, and the product weight (w1) is measured. Next, it is immersed in a water tank for 12 hours, taken out from the water tank, naturally dried for 30 minutes, and then the product weight (w2) is measured. After that, it was heated in the furnace in a state that assumed the construction site (only the surface of the product was in contact with the atmosphere and the other surface was buried in sand). The furnace temperature was 80 ° C. × 10 hours, and the product surface temperature was measured every hour and the product weight (w3) after 80 ° C. × 10 hours was measured. As a result, as shown in Table 3, it was confirmed that the concrete block of the present invention had a temperature drop of about 5 to 7 ° C. as compared with the conventional interlocking block. In addition, the product surface temperature was measured every hour by leaving it outdoors in the summer. Similarly, a temperature lowering effect of about 6 to 8 ° C. was confirmed as compared with the conventional interlocking block. In addition, as shown in Table 4, the water retention rate and water absorption rate are significantly higher than those of the conventional products. Therefore, when solar heat is accumulated in the concrete block, the moisture will evaporate for a long time and the temperature will be lowered. It is peeled off. This effect is due to the fact that the aggregate used in the concrete has a large number of fine pores, so that rainwater absorbs and retains water, and in combination with vermiculite having a high water retention capability, the water retention performance is enhanced. Moreover, since the structure has continuous voids, it is easy to absorb water.
[0016]
In the bending test of the test body, the bending strength of the test bodies NO1 to 4 was measured by a test method according to JASS7 M-101. As a result, the specified value of the interlocking block of 4.9 N / mm 2 or more was satisfied from 6.1 to 6.5 N / mm 2 . The water permeability coefficient is 0.3 to 0.6 cm / s, which satisfies 0.1 cm / s or more specified by the Japan Road Construction Industry Association.
[0017]
[Table 3]
Although it has been shown above that the spread sand is excellent in water retention performance, when the corrected CBR value is measured, the corrected CBR value of the conventional spread sand is 10 to 25 and the spread sand of the present invention is 90 to 100 It has a very big effect. This is because the shape of the slag is square, so that it is wedge-shaped and a small slag of 0.15 to 0.3 mm enters between 1.2 to 2.5 mm of the slag with a large particle size of the slag. This is a result of the improvement of the setting property. Moreover, since slag possesses hydraulic properties, the concrete block is stabilized because it hardens when water is absorbed after construction. Moreover, there is no movement of the sand due to rainwater intrusion, and the concrete block laying is stably fixed for a long time.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating a two-layer structure of a concrete block.
FIG. 2 is a side view illustrating the configuration of pavement using concrete blocks.
FIG. 3 is a partial cross-sectional view schematically showing the structure of a concrete pavement.
FIG. 4 is a manufacturing process diagram of a two-layer concrete block.
FIG. 5 shows a manufacturing process diagram of concrete pavement .
[Explanation of symbols]
1 Surface layer
2 Base layer
3 concrete blocks
4 Laying sand
5 Roadbed
6 Roadbed
7 Paving
10 Blast furnace slow cooling slag
11 Micropores
12 Blast Furnace Granulated Soft Slag
13 Cement paste
13a cement
13b water
13c polymer emulsion
13d cellulose ether
14 Continuous gap
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002240366A JP4138398B2 (en) | 2002-08-21 | 2002-08-21 | Concrete pavement and concrete block with water retention function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002240366A JP4138398B2 (en) | 2002-08-21 | 2002-08-21 | Concrete pavement and concrete block with water retention function |
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| Publication Number | Publication Date |
|---|---|
| JP2004076482A JP2004076482A (en) | 2004-03-11 |
| JP4138398B2 true JP4138398B2 (en) | 2008-08-27 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006241803A (en) * | 2005-03-02 | 2006-09-14 | Ehime Prefecture | Water-absorbing pavement, and aggregate for use therein |
| US7931952B2 (en) | 2005-05-31 | 2011-04-26 | Shinsei Techno Co. Ltd. | Water-retainable molding and method for manufacturing the same |
| JP6119278B2 (en) * | 2013-02-08 | 2017-04-26 | 宇部興産株式会社 | High water retention block and method for producing high water retention block |
| CN104058698B (en) * | 2014-05-29 | 2016-02-10 | 蚌埠华东石膏有限公司 | A kind of blast furnace water quenching dreg concrete and preparation method thereof |
| JP6914682B2 (en) * | 2017-03-17 | 2021-08-04 | 東洋工業株式会社 | Laying block |
| JP6646777B1 (en) * | 2019-03-05 | 2020-02-14 | 太平洋セメント株式会社 | Cement-based porous pavement material |
| CN112030654A (en) * | 2020-07-01 | 2020-12-04 | 中电建十一局工程有限公司 | Exposed aggregate pervious concrete construction method for water environment treatment |
| CN112279566A (en) * | 2020-09-22 | 2021-01-29 | 浙江忠信新型建材股份有限公司 | Special bonding mortar for stainless steel plate for fabricated building and preparation method thereof |
| CN112321264B (en) * | 2020-10-21 | 2022-07-15 | 江苏新路德建设有限公司 | Pervious concrete and preparation method and application thereof |
| CN114369979A (en) * | 2022-01-10 | 2022-04-19 | 中交一公局第八工程有限公司 | Exposed aggregate permeable concrete pavement and construction process thereof |
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