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JP3559086B2 - Difficult-to-germinate powder composition and method for producing the same - Google Patents
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JP3559086B2 - Difficult-to-germinate powder composition and method for producing the same - Google Patents

Difficult-to-germinate powder composition and method for producing the same Download PDF

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JP3559086B2
JP3559086B2 JP2676495A JP2676495A JP3559086B2 JP 3559086 B2 JP3559086 B2 JP 3559086B2 JP 2676495 A JP2676495 A JP 2676495A JP 2676495 A JP2676495 A JP 2676495A JP 3559086 B2 JP3559086 B2 JP 3559086B2
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joint
weight
water
sand
silica sand
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JPH08217512A (en
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務 小野
知秀 相津
和也 平松
武男 森
政幸 藤沢
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Krosaki Harima Corp
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02Macromolecular compounds
    • C04B26/04Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00Use 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
    • C04B20/02Treatment
    • C04B20/04Heat treatment
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/60Agents for protection against chemical, physical or biological attack
    • C04B2103/67Biocides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075Uses not provided for elsewhere in C04B2111/00 for road construction
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Building Environments (AREA)

Description

【0001】
【産業上の利用分野】
本発明は、野外・アメニティー空間を形成する舗装面あるいは植栽地面の補助材料として使用する難発芽性粉粒組成物(以下難発芽性ミックスという)及びその製造法に関する。
【0002】
【従来の技術】
従来、舗装用の目地材としては、砂やモルタルが使用されることが多い。この目地材として砂を使用することは、作業上非常に簡易で且つ低コストであり、透水性もあるため一般的となっているが、雨水等により砂が流出したり草が生えやすいという景観上の問題を有している。モルタルは、雨水等により流出することはないが、舗装材とモルタル目地との間に収縮による隙間や亀裂を発生しやすく、そこに雑草の種子が付着して発芽・成長することがしばしばあるばかりでなく、施工に熟練を要し、塗装面を汚し易く、又、透水性がないため排水に関しても問題がある。
【0003】
砂目地の欠点を解決する方法として、特開平5−85792号公報に、目地用砂に予め水分を与えて十分に湿らせた後に、再乳化型樹脂粉末を所定量混合した舗装ブロック目地材料の製造方法が開示されている。
又、特開平6−144910号公報には、雨水によって流出したり風によって飛散せず長期間に亘って舗装機能を維持できる目地材として砂にセメントと繊維を加えたものを提案し、該目地材の施工に際して充填後に散水工程・養生工程及び洗浄工程を付加した目地材とその施工方法が開示されている。
更に、特開平2−27004号公報には、雑草が繁茂し易い農道、歩道、堤防等において、道路とこれに付帯するコンクリート構造物との間に雑草が成長しないよう、アスファルトと高分子物との混合物に除草剤又は忌避剤を加えた防草注入目地材が開示されている。
【0004】
【発明が解決しようとする課題】
上述した特開平5−85792号公報記載の砂と再乳化型樹脂粉末を所定量混合した舗装ブロック目地材料は、その主要構成材料が砂であることから雨水等を保水する能力が比較的高く、従って、目地部に浸入した水分を迅速に流出もしくは蒸発さることができない。そのために、雑草の種子が何等かの原因で目地に付着或いは混入した場合には発芽・成長することを防止できないという欠点を有している。
又、特開平6−144910号公報記載の砂にセメントと繊維とを加えた目地材は、砂の雨水による流出或いは風による飛散は防止できるものの、セメントを使用していることからくる白化現象を避けることができず、景観材として致命的欠陥を有している。
更に、特開平2−27004号公報記載の雑草注入目地材は透水性が殆どなく、植栽地面には全く使用できないものである。
【0005】
【課題を解決するための手段】
これらの問題を解消するために、本願発明者らは鋭意開発を進めた結果、舗装面の目地材或いは植栽地面の被覆材として用いることができ、しかも取り扱いが容易で施工後に雑草等が生えにくく、又、目地砂の飛散・流出がしにくい特長を持ち、改修も容易な難発芽性ミックス及びその製造法を提供するものである。
本発明の要旨とするところは、混在する雑草等の種子を発芽不能にした珪砂(以下、種.不活性化珪石という)及びセルベンの1種又は2種の混合物に水と反応して硬化する再乳化型粉末エマルジョン(以下、固形化剤という)と硼酸化合物とを混合してなる難発芽性ミックス及びその製造法にある。
【0006】
【作用】
一般に雑草の生える理由としては、第一に目地砂自体に混入していた雑草の種子が雨水により発芽すること、第二に飛来或いは雨水により運ばれてきた雑草の種子が施工された目地に付着し雨水により発芽すること、第三に目地の下の地面に施工前から存在していた雑草の種子が発芽し地表にまで出てくることが考えられる。そこで、本願発明者らは、第一に目地砂自体に生きた雑草の種子を存在させないこと、第二に目地の表面を硬化させることにより飛来或いは雨水により運ばれてきた雑草の種子が目地の表面に滞留しにくくすること、第三に目地砂に硼酸化合物を混合すると共に目地砂自体を固化させることにより目地の下の地面に施工前から存在していた雑草の種子が発芽することを抑制し、且つ、発芽したものが地表にまで出てくることを阻止することで問題を解決することができた。
【0007】
以下、本発明について図面に従って詳細に説明する。
図1は舗装材間の目地部全体に難発芽性ミックスを使用した概要図であり、図1(A)は斜視図、図1(B)は断面図である。図1に示すように、舗装用ブロック1および3の間に目地材である難発芽性ミックス2を充填する。この難発芽性ミックス2は、加熱乾燥した珪砂及びセルベンの1種又は2種の混合物に固形化剤と硼酸化合物とを混合してなる。
【0008】
図2は、舗装材間の目地の一部に難発芽性ミックスを使用した概要図であり、図2(A)は斜視図、図2(B)は断面図である。図2に示すように、舗装用ブロック1および3の間に先ず珪砂4を充填した後に目地材である難発芽性ミックス2を充填する。この使用例の意図するところは、該難発芽性ミックスは珪砂に比べて高価であることから、表面からある厚みまで難発芽性ミックスを使用することにより全体のコストを低減させることにある。
【0009】
図3は、更に他の使用例である植栽地面及び樹木根囲い保護材部に難発芽性ミックスを使用した全体斜視図であり、図4は、根部断面図である。
図3及び図4に示すように、植栽地面5に樹木6を植栽し、該植栽地面5及び樹木根囲い保護材(以下、樹木保護材という)7の部分に難発芽性ミックス2を使用することによって、植栽地面5及び樹木保護材7の部分から雑草の生えることを防止することができる。尚、符号8は支柱、9は土である。
【0010】
本発明において使用する種子不活性化珪砂は、珪砂を採掘し水洗した後、キルンによって600℃の熱風で約10分間以上強制乾燥したものである。この条件では珪砂の温度はキルン通過直後で約105℃以上となり、水洗後に雑草等の種子が残存していたとしても最早発芽することはない。
熱風乾燥後の珪砂をタンク中に保管することが望ましい。それは、その後の雑草等の種子の混入を完全に防止できるばかりでなく、防湿も可能であるからである。尚、ここでは製造コストが比較的低く確実性の高い加熱乾燥珪砂について述べてきたが、それに限定されるものではなく、除草剤によって雑草の種子を発芽不能にさせ洗浄後乾燥した珪砂や、十分な煮沸によって雑草の種子を発芽不能にさせてから乾燥した珪砂等も使用可能である。
【0011】
次に、本発明においてセルベンを用いる理由は、一般的にセルベンの吸水率は0.1%以下と珪砂に比べ非常に低く、しかも透水性も高い性質を有しているからである。従って、目地部に浸入した水分は珪砂の場合より早く流出若しくは蒸発するため、何らかの理由で目地内部に雑草の種子が混入したとしても、それが発芽しにくという特長を有している。
セルベンには廃タイルを原料とするもの、廃衛生陶器を原料とするもの、廃碍子を原料とするもの、廃食器を原料とするもの等があるが、吸水率、色調整及び供給安定性の面から廃タイルを原料とするもの(以下、タイルセルベンという)が最も望ましい。尚、廃耐火物粉砕物、廃ガラス粉砕物等他の無機質粉粒体も使用可能である。種子不活性化珪砂或いはセルベンのいずれか一種を用いればよいが双方を混合して用いると更に良い。その理由は、セルベンが長粒形であるに対して種子不活性化珪砂はほぼ球形であるので、双方を調合することにより目地詰め作業に最適な粒度構成にすることができるからである。
【0012】
本発明において固形化剤をプレミックスした理由は、施工現場での混練では量的管理及び混合均一性に不安があるからである。本発明で目地砂に混合できるエマルジョンは、水系エマルジョン及び再乳化型粉末エマルジョン等が有効である。しかし、目地部に砂を充填した後水系エマルジョンを目地表面に散布するか、若しくは目地部に再乳化型粉末エマルジョンを散布し、その後散水して目地部を硬化させる等の施工方法を取ると、目地砂の硬化状態が不均一になる。また、作業上目地部だけへのエマルジョンの散布が非常に困難なため、舗装材表面にも散布することになり、意匠上表面に艶・べたつき及びべたつきによる汚れが出やすくなる。従って、施工が容易で均一な硬化状態が得られ、なおかつ舗装材の透水性を阻害せず、意匠を損なわなくするには、目地砂にプレミックスとしてエマルジョン適量をあらかじめ混合しておく必要がある。そこで、プレミックスとして混合するエマルジョンは、施工上・製造上再乳化型粉末エマルジョンが好ましいからである。さらに、粉末タイプのためトータル的な運送コストを低く押さえることが出来ることが有利である。この再乳化型粉末エマルジョンとしては、エチレン・酢酸ビニル共重合体、酢酸ビニル・アクリル共重合体、酢酸ビニル・ベオバ共重合体等が使用可能であるが、これらの選定は凝固状況によって選択する。
【0013】
又、本発明においては硼酸化合物を添加する必要がある。この硼酸化合物は再乳化型粉末エマルジョンのゲル化材として有効であり、樹脂の流出を防止でき、エマルジョンの硬化必要量をも減らすことが出来る。又再乳化型粉末エマルジョンに対して、凝集剤として作用するので、充分な強度を均一に発揮でき、かつ発芽抑制剤、殺虫剤、防錆かび材として有効であり、天然鉱物を主原料としているので安全性も高いからである。この硼酸化合物としてはテンカル、コレマナイト、及びウレキサイト等が使用可能である。
【0014】
次に難発芽性ミックスの製造方法として、珪砂の加熱乾燥については表1に示すように、種子の発芽を防止するために珪砂の表面温度を105℃以上にする必要がある。そのために加熱乾燥条件としては、珪砂を採掘後水洗いした後、キルンにて600℃以上、好ましくは600℃〜800℃の熱風で約10分間以上強制乾燥させる。そして熱風乾燥後タンクに保管して飛来する草の種子の付着を防止することにより、植物の種子や、コケ・菌類が全く残存することなく、珪砂に余分な水分も与えなくするものである。
【0015】
【表1】

Figure 0003559086
【0016】
このように加熱乾燥した珪砂と、表2に示すように平均粒径が2mm以下のタイルセルベンの1種又は2種を混合させる。このとき平均粒径を2mm以下とした理由は、舗装材の中で最も目地幅の少ないと思われる舗装ブロックの目地幅が約2mm程度であり、従って、舗装ブロック及びレンガ・舗石・インターロッキングブロック等の目地部への充填性ならびに凝固性を考慮して2mm以下とした。より好ましくは1.1mm(16メッシュ)アンダー程度が良い。なお、骨子間の接着力は粒径の細かい方が表面積が多くなるため増大するが、透水効果が低くなる。従って、粒度分布を調整することにより、特性を引き出すことが出来るものである。
【0017】
【表2】
Figure 0003559086
【0018】
これら加熱乾燥した珪砂とタイルセルベンとの混合物に固形化剤を添加する。固形化剤の添加量は、表3に示すように膜の連続性及び膜の耐久性より1重量%以上10重量%以下である。即ち、1重量%未満であると膜の連続性及び膜の耐久性が得られず、10重量%を超えると粒子間のみの接着でなく粒子間に膜を形成して透水性を低下させ、植栽地面の被覆の場合には樹木への水の供給を悪くするからである。
【0019】
【表3】
Figure 0003559086
【0020】
また、硼酸化合物の混合量については、表4に示すように、発芽性、樹脂膜の劣化、樹木への影響及び再乳化型粉末エマルジョン混合量の削減効果を考慮して、0.1重量%〜3重量%とした。即ち、0.1重量%未満であると発芽抑制の効果を発揮することが出来ず、又、3重量%を超えて混合すると樹脂膜の劣化及び樹木への影響が出るからである。
【0021】
【表4】
Figure 0003559086
【0022】
【実施例】
以下、本発明の実施例によって具体的に説明する。
予め珪砂の表面温度が105℃以上になるように、キルンにて700℃で12分間加熱乾燥した。この珪砂に対して1.0〜1.5mmを有する平均粒径のタイルセルベンを50重量%混合した後、酢酸ビニル系再乳化型粉末エマルジョンを1.0重量%、3.0重量%、5.0重量%及び10.0重量%のそれぞれを混合し、さらにコレマナイトの添加量を0.1重量%、0.5重量%、1.0重量%及び3.0重量%で混合して舗装ブロック目地材料とした。
このようにして製造した難発芽性ミックスを舗装用ブロックの目地に流し込み、その流し込んだ後噴霧器で水を噴霧し、水と反応固化させた。その後、水道ホースを用いて水を目地に流し、目地の洗掘状況を観察した。その結果ホース口を絞って勢い良く水を当てても、特に変化はみられなかった。又、2年間を経過した後の現状を観察した結果、雑草等の発生は全くなかった。
【0023】
【発明の効果】
以上述べたように本発明の舗装ブロック目地材料を使用することにより、雨水等で目地材が流出したり、風によって飛散することなく、舗装材相互間の噛み合せ効果を長期間保持することが出来、舗装の耐久性が増大し、雑草が全く生えること無く、目地の施工を容易に、かつ効率よく、また意匠を損なわず、早期に安定固化する舗装ブロック目地材料を提供することが出来た。
【図面の簡単な説明】
【図1】舗装材間の目地部全体に難発芽性ミックスを使用した概要図、
【図2】他の使用例を示す舗装材間の目地部に難発芽性ミックスを使用した概要図、
【図3】更に他の使用例である植栽地面及び樹木保護材部に難発芽性ミックスを使用した全体斜視図、
【図4】図3の根部断面図。
【符号の説明】
1、3 舗装用ブロック
2 難発芽性ミックス
4 珪砂
5 植栽地面[0001]
[Industrial applications]
The present invention relates to a hardly germinable powder composition (hereinafter referred to as a hardly germinable mix) used as an auxiliary material for a pavement surface or a planting ground forming an outdoor / amenity space, and a method for producing the same.
[0002]
[Prior art]
Conventionally, sand or mortar is often used as a joint material for pavement. The use of sand as the jointing material is very simple and low-cost in terms of work, and is generally used because of its water permeability. Have the above problem. Although mortar does not flow out due to rainwater, etc., gaps and cracks tend to occur between the pavement material and the mortar joint due to shrinkage, and weed seeds often adhere to them and germinate and grow. In addition, the construction requires skill, the painted surface is easily stained, and there is a problem with drainage due to lack of water permeability.
[0003]
As a method for solving the defect of the sand joint, Japanese Patent Application Laid-Open No. 5-85792 discloses a method of pavement block joint material in which a predetermined amount of a re-emulsifying resin powder is mixed after the joint sand is sufficiently moistened in advance. A manufacturing method is disclosed.
Japanese Patent Application Laid-Open No. 6-144910 proposes, as a joint material capable of maintaining a pavement function for a long period of time without flowing out by rainwater or scattering by wind, a material obtained by adding cement and fiber to sand. A joint material in which a sprinkling step, a curing step, and a washing step are added after filling in the construction of a material and a method of constructing the joint material are disclosed.
Further, Japanese Patent Application Laid-Open No. 2-270004 discloses that asphalt and a polymer material are used to prevent weeds from growing between a road and a concrete structure attached thereto on a farm road, a sidewalk, a dike or the like where weeds tend to prosper. And a herbicide or repellent added to a mixture of the above are disclosed.
[0004]
[Problems to be solved by the invention]
The pavement block joint material obtained by mixing a predetermined amount of the sand and the re-emulsifying resin powder described in JP-A-5-85792 described above has a relatively high ability to retain rainwater and the like since its main constituent material is sand, Therefore, it is impossible to quickly flow out or evaporate the water that has entered the joint. For this reason, when the seeds of the weeds are attached to or mixed with the joints for some reason, there is a disadvantage that germination and growth cannot be prevented.
Also, the joint material described in JP-A-6-144910 in which cement and fiber are added to sand can prevent the sand from flowing out due to rainwater or scattering due to wind, but has a whitening phenomenon caused by using cement. It cannot be avoided and has fatal defects as landscape materials.
Further, the weed-injected joint material described in JP-A-2-27004 has almost no water permeability and cannot be used for planting ground at all.
[0005]
[Means for Solving the Problems]
In order to solve these problems, the inventors of the present invention have made intensive developments, and as a result, they can be used as a joint material for pavement surfaces or a covering material for planting grounds. An object of the present invention is to provide a hard-to-germinate mix which has the characteristics of being difficult to be scattered and flowing out of joint sand and easy to repair, and a method for producing the same.
The gist of the present invention is that a mixture of one or two kinds of silica sand (hereinafter referred to as “specified inactivated silica stone”) and cerbens, which make mixed seeds such as weeds ungerminable, reacts with water and hardens. The present invention relates to a hardly germinable mix obtained by mixing a re-emulsifying type powder emulsion (hereinafter, referred to as a solidifying agent) and a boric acid compound, and a method for producing the same.
[0006]
[Action]
In general, weeds grow firstly because weed seeds mixed in the joint sand itself germinate in rainwater, and secondly, weed seeds that have come flying or carried by rainwater adhere to the joint where the weeds were constructed. Thirdly, it is conceivable that the seeds of the weeds that existed before the construction on the ground under the joint germinated and emerged on the ground surface. Therefore, the inventors of the present application firstly confirmed that live weed seeds did not exist in the joint sand itself, and secondly, that the seeds of the weeds that came or were carried by rainwater by hardening the surface of the joints were used as joints. Thirdly, by mixing boric acid compounds in the joint sand and solidifying the joint sand itself, the germination of weed seeds that existed before the construction on the ground under the joints is reduced, making it difficult to stay on the surface. The problem could be solved by preventing the germinated ones from reaching the surface.
[0007]
Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic diagram using a hard-to-germinate mix for the entire joint between pavement materials. FIG. 1 (A) is a perspective view, and FIG. 1 (B) is a cross-sectional view. As shown in FIG. 1, a hardly germinable mix 2 as a joint material is filled between paving blocks 1 and 3. The hardly germinable mix 2 is obtained by mixing a solidifying agent and a boric acid compound with one or two kinds of mixtures of heat-dried silica sand and cerven.
[0008]
FIG. 2 is a schematic diagram in which a hard-to-germinate mix is used for a part of joints between pavement materials. FIG. 2 (A) is a perspective view, and FIG. 2 (B) is a cross-sectional view. As shown in FIG. 2, silica sand 4 is first filled between the paving blocks 1 and 3, and then the hardly germinable mix 2 which is a joint material is filled. The intent of this use example is to reduce the overall cost by using the poorly germinable mix from the surface to a certain thickness since the poorly germinable mix is more expensive than silica sand.
[0009]
FIG. 3 is an overall perspective view in which a hardly germinating mix is used for a planting ground and a tree root surrounding protective material portion which are still another example of use, and FIG. 4 is a root cross-sectional view.
As shown in FIG. 3 and FIG. 4, a tree 6 is planted on the planting ground 5, and the hardly germinable mix 2 is placed on the planting ground 5 and the tree root surrounding protective material (hereinafter referred to as a tree protective material) 7. , Weeds can be prevented from growing from the planting ground 5 and the tree protection material 7. Note that reference numeral 8 is a column, and 9 is soil.
[0010]
The seed-inactivated silica sand used in the present invention is obtained by mining silica sand, washing it with water, and forcibly drying it with hot air at 600 ° C. for about 10 minutes or more using a kiln. Under these conditions, the temperature of the silica sand is about 105 ° C. or higher immediately after passing through the kiln, and the seeds such as weeds will not germinate even if seeds remain after washing with water.
It is desirable to store the silica sand after hot-air drying in a tank. This is because it is possible not only to completely prevent the subsequent incorporation of seeds such as weeds, but also to prevent moisture. In addition, although the heating cost has been described here with respect to heat-dried silica sand having a relatively low production cost and high reliability, the present invention is not limited to this. Silica sand or the like which is dried after making the seeds of the weeds unable to germinate by gentle boiling can also be used.
[0011]
Next, the reason why selven is used in the present invention is that selven generally has a water absorption of 0.1% or less, which is very low as compared with silica sand, and has high water permeability. Therefore, the water that has entered the joints flows out or evaporates faster than silica sand, so that even if weed seeds are mixed in the joints for any reason, it is difficult for them to germinate.
Selven includes waste tiles, waste sanitary ware, waste insulators, waste tableware, etc., and water absorption, color adjustment and supply stability. It is most desirable to use a waste tile as a raw material from the viewpoint of the surface (hereinafter, referred to as tile selven). It is to be noted that other inorganic powders such as waste refractory pulverized material and waste glass pulverized material can also be used. Any one of seed-inactivated silica sand and selven may be used, but it is more preferable to use a mixture of both. The reason is that the seed-inactivated silica sand has a substantially spherical shape while the selben has a long-grained shape, and therefore, it is possible to obtain an optimum particle size composition for joint filling work by blending both.
[0012]
The reason why the solidifying agent is premixed in the present invention is that there is concern about quantitative control and mixing uniformity in kneading at a construction site. Emulsions that can be mixed with the joint sand in the present invention include water-based emulsions and re-emulsifying powder emulsions. However, if the joint is filled with sand and then an aqueous emulsion is sprayed on the joint surface, or a re-emulsifying type powder emulsion is sprayed on the joint, and then a construction method such as watering and curing the joint is adopted. The cured state of the joint sand becomes uneven. In addition, since it is extremely difficult to spray the emulsion only on the joints during operation, the emulsion is also sprayed on the surface of the pavement material, so that the surface of the design tends to be glossy, sticky, and stained by stickiness. Therefore, it is necessary to previously mix an appropriate amount of the emulsion as a premix with the joint sand in order to obtain an easy-to-install and uniform hardened state, not to impair the water permeability of the pavement material, and not to impair the design. . Therefore, the emulsion to be mixed as the premix is preferably a re-emulsifying type powder emulsion in terms of construction and production. Further, it is advantageous that the total transportation cost can be kept low because of the powder type. As the re-emulsifying type powder emulsion, an ethylene / vinyl acetate copolymer, a vinyl acetate / acrylic copolymer, a vinyl acetate / veova copolymer, or the like can be used, and these are selected depending on the coagulation state.
[0013]
In the present invention, it is necessary to add a boric acid compound. The boric acid compound is effective as a gelling material for the re-emulsifying type powder emulsion, can prevent the resin from flowing out, and can reduce the amount of the emulsion required for curing. In addition, since it acts as a coagulant for re-emulsifying powder emulsions, it can exert sufficient strength uniformly, and is effective as a germination inhibitor, insecticide, and fungicide, and uses natural minerals as its main raw material. Therefore, safety is high. As the boric acid compound, tencal, colemanite, urexite and the like can be used.
[0014]
Next, as a method for producing a hardly germinable mix, as shown in Table 1, heating and drying silica sand requires the surface temperature of silica sand to be 105 ° C. or higher in order to prevent seed germination. For this purpose, the conditions for heating and drying are as follows: silica sand is mined, washed with water, and then forcibly dried in a kiln with hot air of 600 ° C. or more, preferably 600 ° C. to 800 ° C. for about 10 minutes or more. Then, by storing in a tank after hot-air drying to prevent the adhesion of grass seeds that fly, no plant seeds, moss or fungi remain, and no extra moisture is given to quartz sand.
[0015]
[Table 1]
Figure 0003559086
[0016]
The silica sand thus heat-dried is mixed with one or two tile cerbens having an average particle diameter of 2 mm or less as shown in Table 2. The reason for setting the average particle size to 2 mm or less at this time is that the joint width of the pavement block, which is considered to be the smallest joint width among the pavement materials, is about 2 mm, and therefore, the pavement block and the brick, paving stone, and interlocking block are used. The thickness is set to 2 mm or less in consideration of the filling property of the joint portion and the solidification property. More preferably, it is about 1.1 mm (16 mesh) under. In addition, the adhesive force between the skeletons increases as the particle size is smaller because the surface area increases, but the water permeation effect decreases. Therefore, characteristics can be brought out by adjusting the particle size distribution.
[0017]
[Table 2]
Figure 0003559086
[0018]
A solidifying agent is added to the mixture of the heat-dried silica sand and Tile Cerben. As shown in Table 3, the addition amount of the solidifying agent is 1% by weight or more and 10% by weight or less from the continuity of the film and the durability of the film. That is, if it is less than 1% by weight, the continuity of the film and the durability of the film cannot be obtained, and if it exceeds 10% by weight, not only the adhesion between the particles but also a film between the particles is formed to lower the water permeability, This is because, in the case of covering the planting ground, the water supply to the trees is deteriorated.
[0019]
[Table 3]
Figure 0003559086
[0020]
As shown in Table 4, the mixing amount of the boric acid compound was 0.1% by weight in consideration of the germination property, deterioration of the resin film, the effect on trees, and the effect of reducing the mixing amount of the re-emulsifying type powder emulsion. To 3% by weight. That is, if the content is less than 0.1% by weight, the effect of suppressing germination cannot be exerted, and if the content exceeds 3% by weight, the deterioration of the resin film and the effect on the trees are caused.
[0021]
[Table 4]
Figure 0003559086
[0022]
【Example】
Hereinafter, the present invention will be described specifically with reference to examples.
It was previously heated and dried in a kiln at 700 ° C. for 12 minutes so that the surface temperature of the silica sand was 105 ° C. or higher. After 50% by weight of tile cerben having an average particle diameter of 1.0 to 1.5 mm is mixed with the silica sand, 1.0% by weight, 3.0% by weight of a vinyl acetate-based re-emulsifying type powder emulsion is added. 0% by weight and 10.0% by weight respectively, and further, the amount of colemanite added is 0.1% by weight, 0.5% by weight, 1.0% by weight and 3.0% by weight, and the pavement block is mixed. Joint material was used.
The poorly germinable mix thus produced was poured into the joint of the pavement block, and after that, water was sprayed with a sprayer to solidify the mixture with the water. Thereafter, water was flowed to the joint using a water hose, and the scouring condition of the joint was observed. As a result, no particular change was observed even when the hose was squeezed and water was applied vigorously. In addition, as a result of observing the current situation after two years, no weeds or the like were generated.
[0023]
【The invention's effect】
As described above, by using the pavement block joint material of the present invention, the joint effect between the pavement materials can be maintained for a long period of time without the joint material flowing out due to rainwater or the like and being scattered by wind. Thus, it was possible to provide a pavement block joint material which can stably solidify at an early stage without increasing the durability of the pavement, producing weeds at all, easily and efficiently joining the joints, and without impairing the design.
[Brief description of the drawings]
FIG. 1 is a schematic diagram using a poorly germinating mix for the entire joint between paving materials,
FIG. 2 is a schematic diagram showing another example of use, in which a non-germinating mix is used in a joint between paving materials;
FIG. 3 is an overall perspective view showing the use of a hard-to-germinate mix for a planting ground and a tree protection material portion, which is still another usage example.
FIG. 4 is a sectional view of a root portion of FIG. 3;
[Explanation of symbols]
1,3 Paving block 2 Difficult-to-germ mix 4 Silica sand 5 Planting ground

Claims (2)

混在する雑草等の種子を発芽不能にした珪砂及びセルベンの1種又は2種の混合物に、水と反応して硬化する再乳化型粉末エマルジョンと硼酸化合物とを添加してなる難発芽性粉粒組成物。Hardly germinable granules obtained by adding a re-emulsifiable powder emulsion which reacts with water and hardens by reacting with water to a mixture of one or two kinds of silica sand and cerbene which make seeds such as mixed weeds unable to germinate. Composition. 難発芽性粉粒組成物を製造する方法において、600℃以上の雰囲気温度で10分間以上加熱乾燥した珪砂及び平均粒径が2mm以下のセルベンの1種又は2種の混合物に、水と反応して硬化する再乳化型粉末エマルジョンを1重量%以上10重量%以下及び酢酸化合物を0.1重量%以上3重量%以下混合してなることを特徴とする難発芽性粉粒組成物の製造法。In a method of producing a powder composition having difficulty in germination, one or a mixture of silica sand and selben having an average particle diameter of 2 mm or less is heated and dried at an atmosphere temperature of 600 ° C. or more for 10 minutes or more, and reacted with water. A method for producing a hardly germinable powder composition, comprising mixing a re-emulsifiable type powder emulsion which cures by curing in an amount of from 1% by weight to 10% by weight and an acetic acid compound in an amount of from 0.1% by weight to 3% by weight. .
JP2676495A 1995-02-15 1995-02-15 Difficult-to-germinate powder composition and method for producing the same Expired - Fee Related JP3559086B2 (en)

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