JP3604334B2 - Slope protection structure and spray material used for the same - Google Patents

Slope protection structure and spray material used for the same Download PDF

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JP3604334B2
JP3604334B2 JP2000256172A JP2000256172A JP3604334B2 JP 3604334 B2 JP3604334 B2 JP 3604334B2 JP 2000256172 A JP2000256172 A JP 2000256172A JP 2000256172 A JP2000256172 A JP 2000256172A JP 3604334 B2 JP3604334 B2 JP 3604334B2
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waste glass
glass material
slope
specific gravity
foamed
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JP2002070028A (en
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裕 原
弘行 原
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建設環境エンジニアリング有限会社
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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

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  • Curing Cements, Concrete, And Artificial Stone (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、発泡廃ガラス材を用いた法面保護構造物およびこれに用いられる吹き付け材に関する。
【０００２】
【従来の技術】
法面保護工としては、法面の全面をコンクリートやモルタルで被覆する工法や、環境保護、美観面からして好ましい植生可能な工法等が採用されている。植生可能な法面保護工の例としては、型枠内に骨材とセメントに水を加えて混練したモルタルを打設して法枠を構築し、法枠内に土砂や植生基盤材を充填し緑化する方法がある。
【０００３】
ところで、自然環境問題が深刻化する昨今、廃棄物のリサイクルへの関心が世間一般に高まっている。これに伴い、様々なリサイクル製品が開発され、活用されている。土木分野においても建設廃材や建設発生土など産業廃棄物のリサイクル活用や最終処分場跡地の有効利用などが行われている。
【０００４】
このような背景から、空ビンやガラス廃材を主原料としたガラスカレットや粉末から、軽量盛土用資材、軽量骨材さらには保温・断熱材として使用することができる不定形塊状の発泡廃ガラス材が開発されている（特開平１０−２０３８３６号公報等）。このガラス廃材を再利用した発泡廃ガラス材は、微少な間隙からなる多孔質構造であって、軽量で強固であるという特性を有する。
【０００５】
【発明が解決しようとする課題】
本発明は、このような発泡廃ガラス材を用いた法面保護構造物およびこれに用いられる吹き付け材を提供することを目的とする。
【０００６】
【課題を解決するための手段】
本発明の法面保護構造物は、法面表面に比重０．３〜１．５の独立間隙を有する多孔質構造の発泡廃ガラス材を骨材として混合したコンクリートまたはモルタルを吹き付け工法によって施したものである。比重０．３〜１．５の発泡廃ガラス材は軽量であることから作業性がよいうえ、コンクリート吹き付けやモルタル吹き付けの骨材として使用する場合の圧縮強度は１５Ｎ／ｍｍ２以上であることから、浸食に対して強く、剥離防止や崩落防止に優れている。また、発泡廃ガラス材は独立間隙を有する多孔質構造であることから吸水しないため、軽量で強度が大きな吹き付け工法による法枠を形成することができる。
【０００７】
また、本発明の法面保護構造物は、法面表面に比重０．３〜０．６の連続間隙を有する多孔質構造の発泡廃ガラス材を混合したポーラスコンクリートまたはポーラスモルタルを吹き付け工法によって施したものとするのが望ましい。このような法面保護構造物においては、連続間隙を有する発泡廃ガラス材は軽量であって吸水することから、緑化用の植生基盤として利用することが可能である。この場合、連続間隙を有する発泡廃ガラス材には事前に吸水させておくようにする。
【０００８】
これらの発泡廃ガラス材は、素材がガラスであるため熱、薬品や油脂類などに対して強く、化学的に安定である。また、腐食することもなく、重金属等の有害物質の溶出もないため、周辺の地盤へ与える影響がない。
【０００９】
また、本発明の別の法面保護構造物は、比重０．３〜１．５の独立間隙を有する多孔質構造の発泡廃ガラス材を骨材として混合したコンクリートまたはモルタルの吹き付け工法によって形成した枠体内に、比重０．３〜０．６の連続間隙を有する多孔質構造の発泡廃ガラス材を混合した植生基盤材を充填したものである。これにより、軽量で浸食に対して強い枠体によって法面を保護する梁が形成されるうえ、さらに枠体内に吸水性が高められた植生基盤材が充填されることにより法面緑化を促進させることが可能となる。
【００１０】
本発明のさらに別の法面保護構造物は、吹き付け工法によって比重０．３〜１．５の独立間隙を有する多孔質構造の発泡廃ガラス材を混合したコンクリートまたはモルタルを法面表面の上段に施したものである。これにより、段付きの法面を構築する場合、法面の上段すなわち頭部を軽量な独立間隙の発泡廃ガラス材を使用した法枠とし、下段すなわち下部を通常の天然骨材（砕石）を使用した法枠としてすべりの抑止や土圧を軽減することが可能となる。
【００１１】
これらの法面保護構造物は、骨材としての比重０．３〜１．５の独立間隙を有する多孔質構造の発泡廃ガラス材、セメントおよび水を配合した吹き付け材、あるいはさらに砂を配合した吹き付け材によって構築することが可能である。このような吹き付け材によれば、軽量であるため作業性がよく、法面の剥離や崩壊に対して非常に抵抗力が強い法面を構築できる。あるいは、砂の代わりに平均粒径０．０７５〜２ｍｍに細粒化した発泡廃ガラス材を用いることも可能である。
【００１２】
また、本発明の別の吹き付け材は、骨材としての比重０．３〜０．６の連続間隙を有する多孔質構造の発泡廃ガラス材および水を配合したもの、あるいはさらに砂を配合したものである。このような吹き付け材によれば、連続間隙を有する発泡廃ガラス材が吸水するため、緑化用の植生基盤を構築することが可能である。
【００１３】
【発明の実施の形態】
本発明の実施の形態における法面保護構造物に用いる骨材としての発泡廃ガラス材は、空ビンなどのガラス廃材を再利用したリサイクル製品（発泡廃ガラス材）であり、その粒径は５〜７５ｍｍ程度である。この発泡廃ガラス材は、例えば、図１に示す製造工程により製造することができる。
【００１４】
図１において、まず、回収された廃ガラスびん１は、金属分離、粗粉砕された後、さらに微粉砕されてパウダー状とされ、炭酸カルシウム、炭化珪素やホウ素などの添加剤２と混合される。次いで、この混合物をベルトコンベア３上に一定の厚さに敷き詰め、７００〜１０００℃の特殊反応炉４に供給して溶融、発泡、焼成して板状発泡廃ガラス材とした後、急冷する。このときに生じる歪みによって自然破砕させることにより、粉砕された発泡廃ガラス材５が得られる。
【００１５】
発泡廃ガラス材５の比重は、添加材量、微粉砕ガラスの粒度、ベルトコンベア上に敷き詰める混合物の厚さ、焼成温度や時間等の製造条件により調整することができる。
【００１６】
ここで、発泡廃ガラス材５が比重０．３〜１．５の独立間隙を有する多孔質構造の発泡廃ガラス材５ａとするためには、まず、ガラスカレットを平均粒径１０〜１００μｍに微粉砕し、発泡剤として炭酸カルシウム、炭化珪素、ホウ砂をそれぞれ０．１〜５．０重量％添加混合する。この混合微粉末をベルトコンベアを内蔵するトンネルキルンまたはローラーハースキルン内ベルト上に５〜５０ｍｍ厚に連続的に敷き詰め、同キルン内において７００〜１０００℃にて溶融、発泡、焼成せしめ、キルン内滞留時間を５〜６分として生成された板状発泡ガラスを、常温ないしは冷却された空気に曝しめ、または水を掛けることにより急冷し、生じた歪みにより自然崩壊せしめることにより、不定形塊状の独立間隙の軽量の発泡廃ガラス材５ａを得ることができる。
【００１７】
また、発泡廃ガラス材５が比重０．３〜０．６の連続間隙を有する多孔質構造の発泡廃ガラス材５ｂとするためには、まず、ガラスカレットを平均粒径１〜３０μｍに微粉砕し、発泡剤として炭酸カルシウム、炭化珪素、ホウ砂をそれぞれ０．１〜２．０重量％添加混合する。この混合微粉末をベルトコンベアを内蔵するトンネルキルンまたはローラーハースキルン内ベルト上に５〜１５０ｍｍの厚みで連続的に板状に敷き詰め、同キルン内において８００〜９５０℃にて１０〜６０分間溶融、発泡、焼成せしめた後、常温ないしは冷却された空気に曝しめ、または水を掛けることにより急冷し、生じた歪みにより自然崩壊せしめることにより、不定形塊状の連続間隙の軽量の発泡廃ガラス材５ｂを得ることができる。
【００１８】
こうして製造された発泡廃ガラス材５ａ，５ｂは、例えば、比重０．４の場合、一軸圧縮強さ２５〜４５ｋＮ／ｍ２、三軸圧縮強さ２０〜３０ｋＮ／ｍ２，φ＝３０°およびＣＢＲ値８〜１５％の強度特性を有する。また、独立間隙を有する多孔質構造の発泡廃ガラス材５ａとする場合、間隙が独立して存在するため、その表面のみに水が付着し、非吸水性で、吸水率は５．８％を示す。一方、連続間隙を有する多孔質構造の発泡廃ガラス材５ｂとする場合、間隙が連続しているため、間隙内への水の流入が多くなり、吸水性で、吸水率は２５．８％を示す。
【００１９】
本実施形態においては、従来のコンクリート吹き付け材またはモルタル吹き付け材の骨材としての砕石に代えて上記発泡廃ガラス材５ａ，５ｂを用い、それぞれ発泡廃ガラス材５ａ，５ｂとセメント、砂および水を配合した吹き付け材６ａ，６ｂ（図２〜図４参照）とする。
【００２０】
比重０．４の発泡廃ガラス材５ａを配合した吹き付け材６ａの場合、配合比は１ｍ３当たり、例えば、セメント３６０ｋｇ、砂１．０７ｍ３（１４４０ｋｇ）、発泡廃ガラス材０．２５ｍ３（７２ｋｇ：間隙率を２８％とした場合）、水セメント比４５〜５５％とし、セメント：砂：発泡廃ガラス材＝１：４：０．２である。配合比はこれを基準とするが、現場条件によりこの配合比を変えるか、あるいは発泡廃ガラス材の比重を変えるものとする。
【００２１】
吹き付け材６ａを圧縮空気により法面へ吹き付けることによって、吹き付け材６ａが圧縮されて付着力および密度が高められる。また、吹き付け材６ａは、比重０．３〜１．５の独立間隙を有する発泡廃ガラス材５ａであるため軽量で作業性が良い。さらに、独立間隙を有する発泡廃ガラス材５ａは吸水しないため、法面の剥離や崩壊に対して非常に抵抗力が強い法面を構築できる。
【００２２】
また、比重０．４の発泡廃ガラス材５ｂを配合した吹き付け材６ｂの場合、配合比は１ｍ３当たり、例えば、セメント３６０ｋｇ、砂１．０７ｍ３（１４４０ｋｇ）、発泡廃ガラス材０．２５ｍ３（７２ｋｇ：間隙率を２８％とした場合）、水セメント比４６〜６５％とし、セメント：砂：発泡廃ガラス材＝１：４：０．２である。配合比はこれを基準とするが、現場条件によりこの配合比を変えるか、あるいは発泡廃ガラス材の比重を変えるものとする。
【００２３】
この吹き付け材６ｂによって法面にポーラスコンクリートまたはポーラスモルタルを施工すれば、比重０．３〜０．６の連続間隙を有する発泡廃ガラス材５ｂが軽量であるため作業性が良く、また、構築された法面は、連続間隙を有する発泡廃ガラス材５ｂおよびポーラスコンクリートまたはポーラスモルタルが吸水するため、緑化用の植生基盤として利用することが可能である。
【００２４】
次に、発泡廃ガラス材５ａ，５ｂによって形成する法面保護構造物の構築方法について説明する。図２は本実施形態における法面保護構造物を示す正面図、図３は図２のＡ−Ａ断面図である。
【００２５】
図２および図３に示す法面保護構造物は、まず型枠（図示せず）内に比重０．３〜１．５の独立間隙を有する多孔質構造の発泡廃ガラス材５ａを混合した前述のコンクリートまたはモルタルの吹き付け材６ａを吹き付け工法によって施工し、法枠７ａ，７ｂを構築する。これらの法枠７ａ，７ｂは、すべりが想定されるような地盤には永久アンカー工法またはロックボルト工法によって固定する。次に、法枠７ａ，７ｂの枠内に比重０．３〜０．６の連続間隙を有する多孔質構造の発泡廃ガラス材５ｂを混合した植生基盤材６ｃを充填する。
【００２６】
吹き付け材６ａの成分である比重０．３〜１．５の発泡廃ガラス材５ａは軽量であることから作業性がよいうえ、コンクリートの骨材として使用する場合の圧縮強度は１５Ｎ／ｍｍ２以上であることから浸食に対して強く、剥離防止や崩壊防止に優れており、図２および図３に示す例においては法枠７ａ，７ｂが法面を保護する梁としての役割を果たす。
【００２７】
また、法面上段の法枠７ａが軽量であることから、土圧を軽減することができ、すべりを抑止することができる。このとき、法面下段の法枠７ｂは通常の天然骨材を使用した法枠とすれば、その自重によりすべりを抑止することも可能である。
【００２８】
また、この法枠７ａ，７ｂの枠内に充填する植生基盤材６ｃの成分である比重０．３〜０．６の連続間隙を有する多孔質構造の発泡廃ガラス材５ｂは、吸水性が高く、水に浸すとすぐに保水するため、発泡廃ガラス材５ｂを混合しない植生基盤材を単独で施した場合と比較して植生植物の茎長および根長の生育を助長させ、法面の緑化をより促進させることが可能である。
【００２９】
なお、図示していないが、法枠７ａ，７ｂを構築することなく、法面表面に吹き付け材６ａまたは吹き付け材６ｂをそれぞれ直接吹き付けて法面保護構造物を構築することも有効である。
【００３０】
図４は本発明の別の実施形態を示す法面保護構造物の断面図であって、（ａ）は施工前の状態を示す図、（ｂ）は施工後の状態を示す図である。
図４（ａ）に示すように、法面Ｇに対して岩石Ｒがオーバーハング状態にある場合、同図（ｂ）に示すように、岩石Ｒの下方に対して吹き付け材６ｂを吹き付け工法によって施工し、さらにその表面に植生基盤材６ｃを施工する。
【００３１】
このような法面保護構造によれば、岩石Ｒの下方の吹き付け材６ｂは、連続間隙を有する発泡廃ガラス材５ｂおよびポーラスコンクリートまたはポーラスモルタルが透水性を有するため、排水性がよく、岩石Ｒの下方の法面の浸食を防止することが可能である。また、その表面に形成した植生基盤材６ｃによって法面緑化を促進させることができ、植生植物への給水は吹き付け材６ｂを介して行われる。
【００３２】
【発明の効果】
本発明により、以下の効果を奏することができる。
【００３３】
（１）法面表面に比重０．３〜１．５の独立間隙を有する多孔質構造の発泡廃ガラス材を混合したコンクリートまたはモルタルを施した法面保護構造物は、浸食に対して強く、剥離防止や崩落防止に優れている。
【００３４】
（２）法面表面に比重０．３〜０．６の連続間隙を有する多孔質構造の発泡廃ガラス材を混合したポーラスコンクリートまたはポーラスモルタルを施した法面保護構造物は、緑化用の植生基盤として利用することが可能である。
【００３５】
（３）比重０．３〜１．５の独立間隙を有する多孔質構造の発泡廃ガラス材を混合したコンクリートまたはモルタルを法面表面の上段に吹き付け工法によって施した法面保護構造物は、段付きの法面に対してすべりの抑止や土圧を軽減することが可能である。
【００３６】
（４）比重０．３〜１．５の独立間隙を有する多孔質構造の発泡廃ガラス材を骨材として混合したコンクリートまたはモルタルの吹き付け工法によって形成した枠体内に、比重０．３〜０．６の連続間隙を有する多孔質構造の発泡廃ガラス材を混合した植生基盤材を充填した法面保護構造物は、軽量で浸食に対して強く、さらに吸水性が高められた植生基盤材によって法面緑化を促進させることが可能である。
【図面の簡単な説明】
【図１】本発明の実施の形態における発泡廃ガラス材の製造工程を示す図である。
【図２】本実施形態における法面保護構造物を示す正面図である。
【図３】図２のＡ−Ａ断面図である。
【図４】本発明の別の実施形態を示す法面保護構造物の断面図であって、（ａ）は施工前の状態を示す図、（ｂ）は施工後の状態を示す図である。
【符号の説明】
１ 廃ガラスびん
２ 添加剤
３ ベルトコンベア
４ 特殊反応炉
５，５ａ，５ｂ 発泡廃ガラス材
６ａ，６ｂ 吹き付け材
６ｃ 植生基盤材
７ａ，７ｂ 法枠
Ｒ 岩石
Ｇ 法面[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a slope protection structure using a foamed waste glass material and a spray material used for the same.
[0002]
[Prior art]
As a slope protection method, a method of covering the entire surface of the slope with concrete or mortar, a method capable of vegetation preferable from the viewpoint of environmental protection and aesthetics, and the like are employed. As an example of vegetation slope protection, a mortar made by adding water to the aggregate and cement is cast into a formwork to construct a stake, and the soil is filled with soil and vegetation base material. There is a method of greening.
[0003]
By the way, in recent years, as natural environmental problems have become more serious, interest in recycling waste has increased. Along with this, various recycled products have been developed and utilized. In the civil engineering field as well, recycling of industrial waste such as construction waste materials and construction waste soil, and effective use of landfill sites at final disposal sites are being carried out.
[0004]
Against this background, glass cullet and powder made from empty bottles and waste glass as raw materials, lightweight embankment materials, lightweight aggregates, and irregular-shaped massive foam waste glass materials that can be used as heat insulating and heat insulating materials Has been developed (JP-A-10-203836, etc.). The foamed waste glass material obtained by recycling the glass waste material has a porous structure including minute gaps, and has characteristics of being lightweight and strong.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a slope protection structure using such a foamed waste glass material and a spraying material used for the same.
[0006]
[Means for Solving the Problems]
The slope protection structure of the present invention is formed by spraying concrete or mortar mixed with an aggregate of a foamed waste glass material having a porous structure having an independent gap having a specific gravity of 0.3 to 1.5 on the slope surface. Things. Since the foamed waste glass material having a specific gravity of 0.3 to 1.5 is light in weight, it has good workability, and also has a compressive strength of 15 N / mm 2 or more when used as an aggregate for spraying concrete or mortar. Highly resistant to erosion and excellent in preventing peeling and falling. Further, since the foamed waste glass material has a porous structure having independent gaps and does not absorb water, it is possible to form a light-weight and high-strength spray frame.
[0007]
Further, the slope protection structure of the present invention is applied by spraying porous concrete or porous mortar mixed with foamed waste glass material having a porous structure having a continuous gap having a specific gravity of 0.3 to 0.6 on the slope surface. It is desirable to have done. In such a slope protection structure, the foamed waste glass material having continuous gaps is lightweight and absorbs water, so that it can be used as a vegetation base for greening. In this case, the foamed waste glass material having a continuous gap is made to absorb water in advance.
[0008]
Since these foamed waste glass materials are glass, they are strong against heat, chemicals, oils and fats, and are chemically stable. Also, since there is no corrosion and no elution of harmful substances such as heavy metals, there is no influence on the surrounding ground.
[0009]
Further, another slope protection structure of the present invention is formed by a spraying method of concrete or mortar in which a foamed waste glass material having a porous structure having an independent gap having a specific gravity of 0.3 to 1.5 is mixed as an aggregate. The frame is filled with a vegetation base material mixed with a foamed waste glass material having a porous structure having a continuous gap having a specific gravity of 0.3 to 0.6. As a result, a beam that protects the slope by a lightweight and erosion-resistant frame is formed, and the slope is further greened by filling the frame with a vegetation base material having increased water absorption. It becomes possible.
[0010]
Still another slope protection structure of the present invention is a method in which concrete or mortar mixed with a foamed waste glass material having a porous structure having an independent gap having a specific gravity of 0.3 to 1.5 by a spraying method is provided on the upper surface of the slope surface. It was done. In this way, when constructing a stepped slope, the upper step, that is, the head, of the slope is a law frame using lightweight foamed waste glass material with an independent gap, and the lower step, that is, the lower part, is made of ordinary natural aggregate (crushed stone). As a used legal framework, it is possible to suppress slippage and reduce earth pressure.
[0011]
These slope protection structures include a foamed waste glass material having a porous structure having an independent gap having a specific gravity of 0.3 to 1.5 as an aggregate, a blowing material containing cement and water, or further containing sand. It is possible to build by spraying material. According to such a spray material, since it is lightweight, workability is good, and a slope having very strong resistance to peeling or collapse of the slope can be constructed. Alternatively, instead of sand, it is also possible to use a foamed waste glass material that has been refined to an average particle size of 0.075 to 2 mm.
[0012]
Further, another spraying material of the present invention is a mixture of a foamed waste glass material having a porous structure having continuous gaps having a specific gravity of 0.3 to 0.6 as an aggregate and water, or a mixture of sand. It is. According to such a spraying material, a foamed waste glass material having a continuous gap absorbs water, so that a vegetation base for greening can be constructed.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
The foam waste glass material as the aggregate used for the slope protection structure according to the embodiment of the present invention is a recycled product (foam waste glass material) that reuses glass waste materials such as empty bottles, and has a particle size of 5 mm. It is about 75 mm. This foam waste glass material can be manufactured, for example, by the manufacturing process shown in FIG.
[0014]
In FIG. 1, first, a recovered waste glass bottle 1 is subjected to metal separation and coarse pulverization, then further finely pulverized into a powder form, and mixed with an additive 2 such as calcium carbonate, silicon carbide or boron. . Next, the mixture is spread on a belt conveyor 3 to a certain thickness, supplied to a special reaction furnace 4 at 700 to 1000 ° C., melted, foamed, and fired to obtain a plate-shaped foamed waste glass material, and then rapidly cooled. By spontaneous crushing by the strain generated at this time, the crushed foamed waste glass material 5 is obtained.
[0015]
The specific gravity of the foamed waste glass material 5 can be adjusted by the production conditions such as the amount of the additive, the particle size of the finely ground glass, the thickness of the mixture spread on the belt conveyor, the firing temperature and the time.
[0016]
Here, in order for the foamed waste glass material 5 to be a porous foamed waste glass material 5a having an independent gap having a specific gravity of 0.3 to 1.5, first, the glass cullet is finely reduced to an average particle size of 10 to 100 μm. The mixture is pulverized, and 0.1 to 5.0% by weight of calcium carbonate, silicon carbide and borax are added and mixed as a foaming agent. This mixed fine powder is continuously spread to a thickness of 5 to 50 mm on a belt in a tunnel kiln or roller hearth kiln with a built-in belt conveyor, melted, foamed, and fired at 700 to 1000 ° C. in the kiln, and retained in the kiln. The plate-like foamed glass produced for 5 to 6 minutes is exposed to room temperature or cooled air, or quenched by pouring water, and spontaneously disintegrated due to the generated strain, thereby forming an independent amorphous mass. A lightweight foamed waste glass material 5a having a gap can be obtained.
[0017]
Further, in order to form the foamed waste glass material 5b having a porous structure in which the foamed waste glass material 5 has a continuous gap having a specific gravity of 0.3 to 0.6, first, the glass cullet is finely pulverized to an average particle size of 1 to 30 μm. Then, 0.1 to 2.0% by weight of calcium carbonate, silicon carbide and borax are added and mixed as a foaming agent. This mixed fine powder is continuously spread in a plate shape with a thickness of 5 to 150 mm on a belt in a tunnel kiln or a roller hearth kiln incorporating a belt conveyor, and melted at 800 to 950 ° C. for 10 to 60 minutes in the kiln. After foaming and sintering, it is exposed to room temperature or cooled air, or quenched by applying water, and spontaneously disintegrated by the generated strain, thereby forming a lightweight foamed waste glass material 5b having a continuous gap of irregular mass. Can be obtained.
[0018]
For example, when the specific gravity is 0.4, the foamed waste glass materials 5a and 5b thus manufactured have a uniaxial compressive strength of 25 to 45 kN / m 2 , a triaxial compressive strength of 20 to 30 kN / m 2 , φ = 30 ° and It has strength characteristics with a CBR value of 8 to 15%. Further, in the case of the foamed waste glass material 5a having a porous structure having independent gaps, since the gaps exist independently, water adheres only to the surface thereof, is not water-absorbing, and has a water absorption of 5.8%. Show. On the other hand, in the case of the foamed waste glass material 5b having a porous structure having continuous gaps, since the gaps are continuous, the flow of water into the gaps increases, and the water absorption rate is 25.8%. Show.
[0019]
In the present embodiment, the foamed waste glass materials 5a and 5b are used in place of the crushed stone as the aggregate of the conventional concrete spraying material or mortar spraying material, and the foamed waste glass materials 5a and 5b and cement, sand and water are respectively used. The blended spray materials 6a and 6b (see FIGS. 2 to 4) are used.
[0020]
If foam glass waste material 5a spraying material 6a blended with a specific gravity of 0.4, mixing ratio 1 m 3 per example, cement 360 kg, sand 1.07m 3 (1440kg), foam waste glass material 0.25 m 3 (72kg : When the porosity is 28%), the water-cement ratio is 45 to 55%, and the cement: sand: foam waste glass material is 1: 4: 0.2. The compounding ratio is based on this, but the compounding ratio is changed according to the on-site conditions, or the specific gravity of the foamed waste glass material is changed.
[0021]
By blowing the blowing material 6a to the slope with compressed air, the blowing material 6a is compressed, and the adhesive force and the density are increased. Further, since the blowing material 6a is a foamed waste glass material 5a having an independent gap having a specific gravity of 0.3 to 1.5, it is lightweight and has good workability. Furthermore, since the foamed waste glass material 5a having an independent gap does not absorb water, a slope having extremely strong resistance to peeling or collapse of the slope can be constructed.
[0022]
Also, in the case of spraying material 6b blended with foam waste glass material 5b specific gravity 0.4, mixing ratio 1 m 3 per example, cement 360 kg, sand 1.07m 3 (1440kg), foam waste glass material 0.25 m 3 (72 kg: when the porosity is 28%), the water-cement ratio is 46-65%, and the cement: sand: foam waste glass material = 1: 4: 0.2. The compounding ratio is based on this, but the compounding ratio is changed according to the on-site conditions, or the specific gravity of the foamed waste glass material is changed.
[0023]
If porous concrete or porous mortar is applied to the slope by the spraying material 6b, the foamed waste glass material 5b having a continuous gap having a specific gravity of 0.3 to 0.6 is lightweight, has good workability, and is constructed. The sloped surface can be used as a vegetation base for greening because the foamed waste glass material 5b having continuous gaps and porous concrete or porous mortar absorb water.
[0024]
Next, a method of constructing the slope protection structure formed by the foamed waste glass materials 5a and 5b will be described. FIG. 2 is a front view showing a slope protection structure according to the present embodiment, and FIG. 3 is a sectional view taken along line AA of FIG.
[0025]
The slope protection structure shown in FIGS. 2 and 3 is obtained by first mixing a foamed waste glass material 5a having a porous structure with an independent gap having a specific gravity of 0.3 to 1.5 in a mold (not shown). Concrete or mortar spraying material 6a is applied by a spraying method to construct legal frames 7a and 7b. These legal frames 7a and 7b are fixed to the ground where a slip is assumed by a permanent anchor method or a lock bolt method. Next, the vegetation base material 6c mixed with the foamed waste glass material 5b having a porous structure having a continuous gap having a specific gravity of 0.3 to 0.6 is filled in the frames of the legal frames 7a and 7b.
[0026]
The foamed waste glass material 5a having a specific gravity of 0.3 to 1.5, which is a component of the spray material 6a, is light in weight and has good workability, and has a compressive strength of 15 N / mm 2 or more when used as a concrete aggregate. Therefore, it is resistant to erosion and excellent in preventing peeling and collapse. In the examples shown in FIGS. 2 and 3, the legal frames 7a and 7b serve as beams for protecting the slope.
[0027]
In addition, since the upper legal frame 7a is lightweight, earth pressure can be reduced, and slip can be suppressed. At this time, if the lower legal frame 7b is a legal frame using ordinary natural aggregate, it is possible to suppress slippage by its own weight.
[0028]
Further, the foamed waste glass material 5b having a porous structure and having a continuous gap having a specific gravity of 0.3 to 0.6, which is a component of the vegetation base material 6c to be filled in the frames of the legal frames 7a and 7b, has high water absorption. In order to retain water as soon as it is immersed in water, the growth of stem and root lengths of vegetated plants is promoted and greening of slopes as compared with a case where a vegetation base material not mixed with foamed waste glass material 5b is used alone. Can be further promoted.
[0029]
Although not shown, it is also effective to directly spray the blast material 6a or the blast material 6b onto the slope surface without constructing the slope frames 7a and 7b to construct the slope protection structure.
[0030]
4A and 4B are cross-sectional views of a slope protection structure showing another embodiment of the present invention, in which FIG. 4A is a diagram showing a state before construction, and FIG. 4B is a diagram showing a state after construction.
As shown in FIG. 4A, when the rock R is in an overhang state with respect to the slope G, as shown in FIG. 4B, the blowing material 6b is sprayed below the rock R by the spraying method. The vegetation base material 6c is further constructed on the surface.
[0031]
According to such a slope protection structure, the blowing material 6b below the rock R has good drainage because the foamed waste glass material 5b and the porous concrete or the porous mortar having the continuous gap have water permeability. It is possible to prevent erosion of the slope below. In addition, the greening of the slope can be promoted by the vegetation base material 6c formed on the surface thereof, and the water supply to the vegetation plants is performed via the spray material 6b.
[0032]
【The invention's effect】
According to the present invention, the following effects can be obtained.
[0033]
(1) A slope protection structure made of concrete or mortar mixed with a foamed waste glass material having a porous structure having an independent gap having a specific gravity of 0.3 to 1.5 on the slope surface is resistant to erosion, Excellent in preventing peeling and falling.
[0034]
(2) A slope protection structure made of porous concrete or porous mortar mixed with foamed waste glass material having a porous structure having a continuous gap having a specific gravity of 0.3 to 0.6 on the slope surface is a vegetation for greening. It can be used as a base.
[0035]
(3) A slope protection structure obtained by spraying concrete or mortar mixed with a foamed waste glass material having a porous structure having an independent gap having a specific gravity of 0.3 to 1.5 onto an upper surface of a slope surface by a spraying method, It is possible to suppress slippage and reduce the earth pressure on the slopes with slabs.
[0036]
(4) A specific gravity of 0.3 to 0.1 is formed in a frame formed by spraying concrete or mortar in which a foamed waste glass material having a porous structure having an independent gap having a specific gravity of 0.3 to 1.5 is mixed as an aggregate. The slope protection structure filled with a vegetation base material mixed with a foamed waste glass material having a porous structure having 6 continuous gaps is lightweight, resistant to erosion, and further improved by using a vegetation base material having improved water absorption. Greening can be promoted.
[Brief description of the drawings]
FIG. 1 is a diagram showing a manufacturing process of a foamed waste glass material according to an embodiment of the present invention.
FIG. 2 is a front view showing a slope protection structure according to the embodiment.
FIG. 3 is a sectional view taken along line AA of FIG. 2;
FIG. 4 is a cross-sectional view of a slope protection structure showing another embodiment of the present invention, wherein (a) is a view showing a state before construction, and (b) is a view showing a state after construction. .
[Explanation of symbols]
1 Waste Glass Bottle 2 Additive 3 Belt Conveyor 4 Special Reactor 5,5a, 5b Foamed Waste Glass Material 6a, 6b Spraying Material 6c Vegetation Base Material 7a, 7b Frame R Rock G Slope

Claims (7)

法面表面に比重０．３〜１．５の独立間隙を有する多孔質構造の発泡廃ガラス材を混合したコンクリートまたはモルタルを圧縮空気により吹き付けて圧縮し、付着力および密度を高めて圧縮強度を１５Ｎ／ｍｍ 2 以上とした法面保護構造物。Concrete or mortar mixed with foamed waste glass material having a porous structure having an independent gap having a specific gravity of 0.3 to 1.5 on the slope surface is blown with compressed air to compress, and the compressive strength is increased by increasing the adhesive force and density. Slope protection structure with 15 N / mm 2 or more . 前記発泡廃ガラス材を混合したコンクリートまたはモルタルを前記法面表面の上段に施し、通常の天然骨材を使用した法枠を前記法面表面の下段に施した請求項１記載の法面保護構造物。The slope protection structure according to claim 1, wherein concrete or mortar mixed with the waste foam glass material is applied on an upper stage of the slope surface, and a legal frame using ordinary natural aggregate is applied on a lower stage of the slope surface. object. 比重０．３〜０．６の連続間隙を有する多孔質構造の発泡廃ガラス材を混合したポーラスコンクリートまたはポーラスモルタルを圧縮空気により法面表面に吹き付けて圧縮し、付着力および密度を高めて圧縮強度を１５Ｎ／ｍｍ 2 以上とした法面保護構造物。Porous concrete or porous mortar mixed with foamed waste glass material having a porous structure having a specific gap of 0.3 to 0.6 is sprayed on the slope surface with compressed air and compressed, and the adhesive force and density are increased to compress. A slope protection structure having a strength of 15 N / mm 2 or more . 比重０．３〜１．５の独立間隙を有する多孔質構造の発泡廃ガラス材を混合したコンクリートまたはモルタルによって形成した枠体内に、比重０．３〜０．６の連続間隙を有する多孔質構造の発泡廃ガラス材を混合した植生基盤材を充填した法面保護構造物。Porous structure having continuous gaps having a specific gravity of 0.3 to 0.6 in a frame formed of concrete or mortar mixed with a foamed waste glass material having a porous structure having a specific gap having a specific gravity of 0.3 to 1.5. Slope protection structure filled with vegetation base material mixed with foamed waste glass material. 比重０．３〜１．５の独立間隙を有する多孔質構造の発泡廃ガラス材、セメントおよび水を配合し、圧縮空気により法面表面に吹き付けて圧縮し、付着力および密度を高めて吹き付け後の圧縮強度を１５Ｎ／ｍｍ 2 以上とする吹き付け材。A foamed waste glass material of a porous structure having an independent gap having a specific gravity of 0.3 to 1.5, a cement and water are blended, and the compressed air is blown onto a slope surface to compress the surface, and after the spraying, the adhesion and density are increased. Spraying material having a compression strength of 15 N / mm 2 or more . 比重０．３〜０．６の連続間隙を有する多孔質構造の発泡廃ガラス材、セメントおよび水を配合し、圧縮空気により法面表面に吹き付けて圧縮し、付着力および密度を高めて吹き付け後の圧縮強度を１５Ｎ／ｍｍ 2 以上とする吹き付け材。A foamed waste glass material having a porous structure having a continuous gap having a specific gravity of 0.3 to 0.6, a cement and water are blended, and the compressed air is blown onto the slope surface to be compressed. Spraying material having a compression strength of 15 N / mm 2 or more . さらに平均粒径０．０７５〜２ｍｍに細粒化した発泡廃ガラス材を配合した請求項５または６記載の吹き付け材。Spraying material according to claim 5 or 6, wherein blended with and comminuted to a flat Hitoshitsubu径0.075~2mm to further foam waste glass material.
JP2000256172A 2000-08-25 2000-08-25 Slope protection structure and spray material used for the same Expired - Lifetime JP3604334B2 (en)

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US6913643B2 (en) * 2003-02-18 2005-07-05 Integrated Environmental Technologies, Llc Lightweight foamed glass aggregate
JP3957667B2 (en) * 2003-09-04 2007-08-15 電気化学工業株式会社 Spraying material and spraying method using the same
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