JP2004182597A - Pavement stone capable of preventing propagation of weed - Google Patents

Pavement stone capable of preventing propagation of weed Download PDF

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JP2004182597A
JP2004182597A JP2004039085A JP2004039085A JP2004182597A JP 2004182597 A JP2004182597 A JP 2004182597A JP 2004039085 A JP2004039085 A JP 2004039085A JP 2004039085 A JP2004039085 A JP 2004039085A JP 2004182597 A JP2004182597 A JP 2004182597A
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calcium
powder
igneous rock
weeds
firing
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JP3806122B2 (en
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Teruaki Ono
照旺 大野
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TOUSEKI MATER CO Ltd
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    • 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
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    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/60Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes

Abstract

<P>PROBLEM TO BE SOLVED: To provide pavement stone inexpensively mass-produced and capable of effectively preventing the propagation of weed. <P>SOLUTION: The germination of the seed of the weed is prevented by firing igneous rock containing calcium to move calcium to the surface and making the pH of water stuck on the surface alkaline by the calcium on the surface. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

本発明は道路や公園等に敷き詰めて、雑草が繁殖するのを防止する敷石とその製造方法に関する。   The present invention relates to a pavement that is spread over a road, a park, or the like to prevent the propagation of weeds and a method of manufacturing the same.

カルシウムが、除草効果を示すことは知られている(特開昭49−86542号公報)。さらに、地面に、たとえば数cmの厚さに砂利等の細骨材を敷き詰めて、雑草が繁殖するのを防止することができる技術も知られている。地面に敷き詰められた細骨材は、乾燥状態となるために、この上に雑草の種子が落下しても、種子には水分が供給されず、発芽しない。しかしながら、細骨材を敷き積める構造は、数年もすると雑草が繁殖するようになる。それは、土砂が風で運ばれて来て、種子を発芽させる環境となるからである。   It is known that calcium has a herbicidal effect (JP-A-49-86542). Further, there is also known a technique in which fine aggregate such as gravel is spread over the ground to a thickness of, for example, several cm to prevent weeds from growing. Since the fine aggregate spread on the ground is in a dry state, even if weed seeds fall on the fine aggregate, no water is supplied to the seeds and the seeds do not germinate. However, the structure on which fine aggregates can be laid allows weeds to grow in a few years. This is because the soil is brought in by the wind and provides an environment for germinating seeds.

地面に敷き詰める骨材に、カルシウム含有量の多い石が使用できるなら、雑草の繁殖を効果的に防止できる。骨材に含まれるカルシウムが、表面のpHを強アルカリ性として種子の発芽を阻止するからである。しかしながら、実際には天然石を破砕したもので、骨材の表面pHを、雑草の発芽を効果的に阻止できる強アルカリとすることができない。このため、カルシウムを含む天然石を破砕した骨材を地面に敷き詰めても、2年もすると雑草が繁殖する欠点がある。   If stones with high calcium content can be used as aggregates to be laid on the ground, weed growth can be effectively prevented. This is because the calcium contained in the aggregate makes the surface pH highly alkaline and inhibits seed germination. However, in actuality, natural stone is crushed, and the surface pH of the aggregate cannot be made a strong alkali that can effectively prevent germination of weeds. For this reason, even if the aggregate which crushed the natural stone containing calcium is laid on the ground, there is a fault that weeds propagate in two years.

本発明は、この欠点を解決するために種々の実験を繰り返した結果、カルシウムを含む石を焼成することにより、内部に含有されるカルシウムを表面に移行させて、極めて長期間にわたって効果的に雑草の繁殖を阻止することに成功した。したがって、本発明の大切な目的は、安価に多量生産して、雑草の繁殖を効果的に阻止できる敷石とこの敷石の製造方法を提供することにある。   As a result of repeating various experiments in order to solve this drawback, the present invention sinters calcium-containing stones to transfer calcium contained therein to the surface and effectively weeds for an extremely long period of time. Successfully stopped breeding. Accordingly, it is an important object of the present invention to provide a cobblestone that can be mass-produced at low cost and that can effectively inhibit the propagation of weeds, and a method of manufacturing the cobblestone.

雑草の繁殖を防止する敷石は、カルシウムを含有している火成岩を焼成して、内部に含まれるカルシウムを表面移行させている。表面のカルシウムは、雨水が付着するときに付着水のpHを強アルカリとして、雑草の繁殖を阻止する。   Paving stones that prevent the growth of weeds burn igneous rocks containing calcium and transfer calcium contained inside to the surface. Calcium on the surface prevents the growth of weeds by making the pH of the attached water a strong alkali when rainwater is attached.

敷石は、好ましくは、酸化カルシウムの含有量を0.5重量%以上とする火成岩を850〜1300℃で焼成したものである。この温度で焼成された敷石は、含有されるカルシウムをもっとも効果的に表面に移行できる。850℃よりも低温で焼成すると、含有されるカルシウムを効率よく移行できない。また、1300℃よりも高温で焼成すると、含有されるカルシウムが消失して少なくなる。   The paving stone is preferably one obtained by firing igneous rock having a calcium oxide content of 0.5% by weight or more at 850 to 1300 ° C. Paving stones fired at this temperature can transfer the contained calcium to the surface most effectively. If calcined at a temperature lower than 850 ° C., the contained calcium cannot be transferred efficiently. Further, when calcined at a temperature higher than 1300 ° C., the contained calcium disappears and decreases.

さらに、敷石は、平均粒径を1〜20mmとする砕石に破砕された火成岩を焼成したものである。この粒径に破砕して焼成すると、敷石の表面積が大きくなって、含有カルシウムを効率よく表面に移行できる。   Further, the paving stone is obtained by firing igneous rock crushed into crushed stone having an average particle size of 1 to 20 mm. When crushed to this particle size and fired, the surface area of the paving stones increases, and the contained calcium can be efficiently transferred to the surface.

また、敷石は、火成岩の一種である噴出岩を破砕して製作される。   Paving stones are made by crushing erupted rocks, a type of igneous rock.

本発明の雑草の繁殖を防止する敷石の製造方法は、カルシウムを含有する火成岩を破砕する工程で発生する火成岩粉末と、コンクリートの骨材に使用される砕石を人工的に製造する工程で発生する粉末残渣とを混合して粒状に成形し、成形された原料粒を焼成してカルシウムを表面に移行させる。   The method for manufacturing a cobblestone for preventing the propagation of weeds according to the present invention occurs in the step of ignited rock powder generated in the step of crushing igneous rock containing calcium and the step of artificially manufacturing crushed stone used for concrete aggregate. The powdery residue is mixed with the mixture to form granules, and the formed raw material particles are calcined to transfer calcium to the surface.

以上の方法で製造される敷石は、たとえば、火成岩粉末の混合量を10〜70重量%とする。火成岩粉末の添加量が少なくなると、カルシウム含有量が少なくなって、雑草の除草効果が低下する。火成岩粉末の添加量を多くすると、粉末残渣の添加量が少なくなって、多量の粉末残渣を有効に再利用するのが難しくなる。   The paving stones manufactured by the above method have, for example, a mixture of igneous rock powder of 10 to 70% by weight. When the amount of igneous rock powder added is reduced, the calcium content is reduced, and the herbicidal effect of weeds is reduced. When the addition amount of igneous rock powder is increased, the addition amount of powder residue becomes small, and it becomes difficult to effectively reuse a large amount of powder residue.

火成岩粉末と粉末残渣の混合体は、好ましくは多孔質な状態に成形して焼成する。   The mixture of igneous rock powder and powder residue is preferably formed into a porous state and fired.

本発明の雑草の繁殖を防止する敷石は、安価に多量生産して、雑草の繁殖を効果的に阻止できる特長がある。それは、本発明の敷石が、焼成して含有カルシウムを表面移行させ、このカルシウムで表面に付着する水のpHを強アルカリにして、雑草の種子の発芽を阻止するからである。   The paving stones for preventing the propagation of weeds of the present invention are characterized in that they can be mass-produced at low cost and can effectively prevent the propagation of weeds. This is because the paving stones of the present invention are calcined to transfer the contained calcium to the surface, make the pH of water adhering to the surface with the calcium strong alkali, and prevent germination of weed seeds.

さらに、本発明の雑草の繁殖を防止する敷石の製造方法は、天然石を破砕するときに発生する膨大な粉末残渣を有効に再利用して、雑草の繁殖を有効に防止できる特長がある。   Furthermore, the method of the present invention for manufacturing a cobblestone for preventing the propagation of weeds has the feature that the enormous powder residue generated when crushing natural stones can be effectively reused to effectively prevent the propagation of weeds.

以下、本発明の実施例を図面に基づいて説明する。ただし、以下に示す実施例は、本発明の技術思想を具体化するための雑草の繁殖を防止する敷石とその製造方法を例示するものであって、本発明は雑草の繁殖を防止する敷石とその製造方法を下記のものに特定しない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the following examples illustrate the paving stones for preventing the propagation of weeds and the method for producing the same to embody the technical idea of the present invention, and the present invention relates to paving stones for preventing the propagation of weeds. The manufacturing method is not specified below.

雑草の繁殖を防止する敷石1は、図1の断面図に示すように、地面2の上に所定の厚さ(d)に敷設される。敷設厚さ(d)は、たとえば2〜20cm、好ましくは3〜15cm、さらに好ましくは3〜10cm、最適には約5cmとする。敷設厚さを厚くすると、より長い年月にわたって雑草の繁殖を有効に防止できる。敷設厚さが薄過ぎると、種子が発芽しやすくなる。   The paving stones 1 for preventing the propagation of weeds are laid on the ground 2 at a predetermined thickness (d), as shown in the sectional view of FIG. The laying thickness (d) is, for example, 2 to 20 cm, preferably 3 to 15 cm, more preferably 3 to 10 cm, and optimally about 5 cm. Increasing the laying thickness can effectively prevent weed propagation over a longer period of time. If the laying thickness is too thin, the seeds are likely to germinate.

敷石1は、たとえば、平均粒径を1〜20mm、好ましくは2〜20mm、さらに好ましくは2.5〜20mmとする。この平均粒径の敷石は、地面に敷いて外観を美しくできる。また、表面を簡単に平面状にできる特長もある。ただ、平均粒径を1mmより小さく、あるいは、20mmより大きくすることもできる。さらに、平均粒径が異なる複数種のものを混合することもできる。   The paving stone 1 has, for example, an average particle size of 1 to 20 mm, preferably 2 to 20 mm, and more preferably 2.5 to 20 mm. Paving stones of this average particle size can be beautifully laid out by laying on the ground. Another feature is that the surface can be easily made flat. However, the average particle size may be smaller than 1 mm or larger than 20 mm. Further, a plurality of kinds having different average particle diameters may be mixed.

地面に敷設される敷石1は、雨水や散水によって表面に水が付着する。本発明の敷石は、表面に付着する水を強アルカリ性として、雑草の種子が発芽するのを阻止する。表面付着水は、焼成して敷石の表面に移行させたカルシウムによって強アルカリとなる。カルシウムは、焼成する前には内部に含有されているが、焼成するときに、表面移行する。敷石は、焼成前と、焼成後では、表面付着水のpHが著しく異なる。カルシウムを含有している天然石は、焼成しない状態では、表面付着水のpHを強アルカリとすることができない。   Water is attached to the surface of the paving stone 1 laid on the ground by rainwater or water sprinkling. The paving stones of the present invention make the water adhering to the surface highly alkaline and prevent the seeds of weeds from germinating. The water adhering to the surface becomes a strong alkali by the calcium transferred to the surface of the cobblestone by firing. Calcium is contained inside before firing, but migrates to the surface when firing. Paving stones have a markedly different pH of water adhering to the surface before and after firing. Uncalcined natural stones containing calcium cannot make the pH of the water adhering to the surface strong alkali.

焼成して表面付着水を強アルカリとする天然石は、たとえば、酸化カルシウムの含有量を、たとえば0.5重量%以上、好ましくは1.5重量%、さらに好ましくは2重量%、最適には2.2重量%とする火成岩である。酸化カルシウムの含有量が多い天然石を焼成した敷石は、カルシウムの表面移行量が多く、表面付着水をより強いアルカリとして雑草の繁殖をより効果的に、しかも長期間にわたって保持する。   Natural stones that are calcined to make the surface-adhered water a strong alkali have a calcium oxide content of, for example, 0.5% by weight or more, preferably 1.5% by weight, more preferably 2% by weight, and optimally It is an igneous rock whose content is 0.2% by weight. Paving stones obtained by calcining natural stones having a high content of calcium oxide have a large amount of calcium transferred to the surface, and use surface-attached water as a stronger alkali to keep weeds growing more effectively and for a long time.

敷石は、天然石である火成岩を、前述の粒径に破砕したものを焼成して製造され、あるいは、粉末を成形し焼成して製造する方法とがある。粉末を成形して焼成する方法は、カルシウムを含有する火成岩を破砕する工程で発生する火成岩粉末と、コンクリートの骨材に使用される砕石を人工的に製造する工程で、天然石を破砕して砕石を分離したときに発生する粉末残渣とを混合して粒状に成形する。このようにして成形された原料粒が焼成されて、火成岩粉末に含有されるカルシウムを表面移行させる。いずれの方法で製造された敷石も、焼成工程で含有カルシウムを表面移行させる。   Paving stones are produced by firing igneous rock, which is a natural stone, crushed to the above particle size, or by molding and firing powder. The method of molding and firing powder is a process of artificially producing igneous rock powder generated in the step of crushing igneous rock containing calcium and crushed stone used for concrete aggregate, crushing natural stone Is mixed with a powder residue generated when the powder is separated and formed into granules. The raw material particles thus formed are fired to transfer calcium contained in the igneous rock powder to the surface. The paving stones manufactured by any of the methods transfer the calcium content to the surface in the firing step.

火成岩粉末と粉末残渣とを混合して粒状に成形して焼成する方法は、火成岩を所定の形状に加工するときに廃棄物として発生する火成岩粉末と、コンクリートの骨材を製造する工程で発生する膨大な量の粉末残渣とを有効に再利用して、雑草の繁殖を防止できる。この方法は、粉末残渣の添加量を多くして、原料コストを低減できる。ただ、粉末残渣が多すぎると含有されるカルシウム量が少なくなって、雑草の繁殖を阻止する効力が低下する。したがって、好ましくは、火成岩粉末の混合量を全体の10〜70重量%とする。ただし、火成岩粉末に、含有カルシウム量の多いものを使用すると、火成岩粉末の混合量を少なく、いいかえると、多量の粉末残渣を混合して、表面移行したカルシウム量を多くしている敷石を製造できる。   The method of mixing igneous rock powder and powder residue, forming into granules, and firing is performed in a process of manufacturing igneous rock powder and concrete aggregate generated as waste when processing igneous rock into a predetermined shape. An enormous amount of powder residue can be effectively reused to prevent weed propagation. This method can reduce the raw material cost by increasing the amount of powder residue added. However, if the amount of the powder residue is too large, the amount of calcium contained becomes small, and the effect of inhibiting the propagation of weeds decreases. Therefore, preferably, the mixing amount of the igneous rock powder is set to 10 to 70% by weight of the whole. However, if the igneous rock powder used contains a large amount of calcium, the mixing amount of the igneous rock powder is small, in other words, a large amount of powder residue can be mixed to produce a cobblestone with a large amount of calcium transferred to the surface .

さらに、火成岩粉末と粉末残渣とを混合して成形し、この成形品を焼成して製造される敷石は、多孔質な状態として焼成することもできる。多孔質な敷石は、焼成工程における割れを少なくできる。それは、多孔質な空隙が、焼成時に発生する熱膨張歪を吸収する緩衝作用をするからである。天然の火成岩も、ミクロに観察すると微細な空隙がある多孔質な天然石である。このため、火成岩は、所定の粒度に破砕して焼成するとき、熱歪で割れが発生しない特長がある。   Furthermore, igneous rock powder and powder residue are mixed and molded, and the paving stones produced by firing this molded article can be fired in a porous state. Porous paving stones can reduce cracks in the firing process. This is because the porous voids have a buffering function of absorbing thermal expansion strain generated during firing. Natural igneous rock is also a porous natural stone with microscopic voids when observed microscopically. For this reason, igneous rock is characterized in that when crushed to a predetermined particle size and fired, cracks do not occur due to thermal strain.

焼成して製造される敷石は、酸化鉄を含有する天然石を使用し、あるいは、酸化鉄を含有する粉末を成形して焼成し、焼成後の表面を、極めて美しい赤色ないし茶色にできる。この敷石は、地面に敷設して極めて美しくできる。とくに、雨水や散水で濡れたときに、より鮮やかな赤色から褐色になる特長がある。焼成して赤色から茶色になる敷石は、酸化鉄の含有量を1〜10重量%とする。   The paving stones produced by firing use natural stones containing iron oxide, or molding and firing powders containing iron oxide, and the surface after firing can be made very beautiful red or brown. The paving stones can be laid on the ground to make them very beautiful. In particular, when it is wet with rainwater or sprinkling water, it has the feature of turning from brighter red to brown. The paving stones which turn from red to brown upon firing have an iron oxide content of 1 to 10% by weight.

敷石は焼成温度によって、表面移行するカルシウム量が変化する。焼成温度が低すぎると、含有されるカルシウムを効率よく表面移行することが難しい。反対に焼成温度が高すぎると、カルシウムが消失して表面のカルシウム量が少なくなる。最適な焼成温度は、約1000℃である。ただし、好ましくは、850〜1300℃、より好ましくは890〜1200℃の範囲で焼成して、含有カルシウムを効率よく表面移行できる。   The amount of calcium transferred to the surface of the paving stone changes depending on the firing temperature. If the firing temperature is too low, it is difficult to efficiently transfer the contained calcium to the surface. Conversely, if the firing temperature is too high, calcium disappears and the amount of calcium on the surface decreases. The optimal firing temperature is about 1000 ° C. However, preferably, firing is performed at a temperature in the range of 850 to 1300 ° C, more preferably 890 to 1200 ° C, so that the contained calcium can be efficiently transferred to the surface.

[実施例1]
以下の方法で、雑草の繁殖を防止する敷石を製造する。
(1) 以下の成分を含有する火成岩である噴出岩を、平均粒径が約3〜5mmとなるように破砕する。
SiO…………70重量%
Al……… 16重量%
Fe………… 2重量%
CaO……… 2.5重量%
[Example 1]
Paving stones that prevent the propagation of weeds are manufactured by the following method.
(1) Crush erupted rocks, which are igneous rocks containing the following components, so that the average particle size is about 3 to 5 mm.
SiO 2 ... 70% by weight
Al 2 O 3 16% by weight
Fe 2 O 3 2% by weight
CaO 2.5% by weight

(2) 破砕した火成岩を焼成炉に搬入し、1000℃で3時間焼成して、含有するカルシウムを表面移行して敷石とする。 (2) The crushed igneous rock is carried into a firing furnace and fired at 1000 ° C. for 3 hours, and the contained calcium is transferred to the surface to form a cobblestone.

[実施例2]
焼成後に破砕する以外、実施例1と同様にして敷石を製造する。
[Example 2]
A cobblestone is manufactured in the same manner as in Example 1 except that it is crushed after firing.

[実施例3]
焼成温度を1100℃とする以外、実施例1と同様にして敷石を製造する。
[Example 3]
A cobblestone is manufactured in the same manner as in Example 1 except that the firing temperature is 1100 ° C.

[実施例4]
焼成温度を900℃とする以外、実施例1と同様にして敷石を製造する。
[Example 4]
A cobblestone is manufactured in the same manner as in Example 1, except that the firing temperature is 900 ° C.

[実施例5]
以下の方法で、雑草の繁殖を防止する敷石を製造する。
(1) 実施例1の製造方法に使用した火成岩を粉末にした火成岩粉末と、コンクリートの骨材に使用される砕石を人工的に製造する工程で、天然石を破砕して砕石を分離したときに発生する粉末残渣とを混合して粒状に成形する。火成岩粉末と粉末残渣の混合量は、同重量、すなわち、火成岩粉末の添加量を50重量%とする。混合した粉末に水を添加して、これを平均粒径を約5mmとする球形に成形する。成形は、水を添加した粉末を金型に入れてプレス成形し、あるいは、粉末を回転するトロンメルに供給し、トロンメルに散水しながら転動させて雪ダルマのように大きく成長させて所定の球形にする。トロンメルで球形に成形する方法は、焼成した状態でより多孔質な状態にできる。それは、粉末が隙間ができる状態で結合して成形されるからである。粉末を成形するときに、焼成して消失される有機質のバインダー、たとえば、PVC等を添加して成形することもできる。バインダーを使用する方法は、乾燥した後、焼成炉に搬入するまでの型崩れを防止できる。また、バインダーが消失して、より多孔質な状態に焼結できる。
[Example 5]
Paving stones that prevent the propagation of weeds are manufactured by the following method.
(1) In the process of artificially producing igneous rock powder obtained by powdering igneous rock used in the production method of Example 1 and crushed stone used for concrete aggregate, when natural stone is crushed to separate crushed stone, The resulting powder residue is mixed with the mixture to form granules. The mixing amount of the igneous rock powder and the powder residue is the same weight, that is, the addition amount of the igneous rock powder is 50% by weight. Water is added to the mixed powder to form a spherical shape having an average particle size of about 5 mm. For molding, the powder with water added is put into a mold and press-molded, or the powder is supplied to a rotating trommel and spun while sprinkling water on the trommel to grow large like a snow dharma and to form a predetermined spherical shape. To The method of forming a spherical shape with trommel can be made more porous after baking. This is because the powders are combined and formed in a state where a gap is formed. When molding the powder, an organic binder which is eliminated by firing, for example, PVC or the like may be added to the powder to be molded. The method of using the binder can prevent the shape from being dried to being carried into the firing furnace. Further, the binder disappears, and sintering to a more porous state is possible.

(2) 成形された原料粒を乾燥させた後、焼成炉に搬入して、900℃で3時間焼成する。この焼成工程で、含有カルシウムは表面に移行され、さらに、成形品がを硬い粒状に焼結されて敷石となる。 (2) After the formed raw material particles are dried, they are carried into a firing furnace and fired at 900 ° C. for 3 hours. In this firing step, the contained calcium is transferred to the surface, and the molded article is sintered into hard granules to form paving stones.

[実施例6]
30重量部の火成岩粉末と、70重量部の粉末残渣とを混合して成形し、焼成温度を1000℃とする以外、実施例5と同様にして敷石を製造する。
[Example 6]
A cobblestone is manufactured in the same manner as in Example 5 except that 30 parts by weight of the igneous rock powder and 70 parts by weight of the powder residue are mixed and formed, and the firing temperature is set to 1000 ° C.

[実施例7]
20重量部の火成岩粉末と、80重量部の粉末残渣とを混合して成形し、焼成温度を1200℃とする以外、実施例5と同様にして、敷石を製造する。
[Example 7]
A cobblestone is manufactured in the same manner as in Example 5, except that 20 parts by weight of igneous rock powder and 80 parts by weight of powder residue are mixed and molded, and the firing temperature is set to 1200 ° C.

[実施例8]
80重量部の火成岩粉末と、20重量部の粉末残渣とを混合して成形し、焼成温度を1000℃とする以外、実施例5と同様にして、敷石を製造する。
Example 8
A cobblestone is manufactured in the same manner as in Example 5 except that 80 parts by weight of the igneous rock powder and 20 parts by weight of the powder residue are mixed and molded, and the firing temperature is set to 1000 ° C.

実施例1〜8で製造した敷石100gを、1000ccの水に20分間浸漬して、水のpHを測定すると以下のように強アルカリとなった。参考に、比較例として、実施例1で使用した火成岩と同じものであって焼成しないものも水に浸漬して、水のpHを測定した。敷石を浸漬する前の水pHは7.7とほぼ中性であった。   100 g of the paving stones manufactured in Examples 1 to 8 were immersed in 1000 cc of water for 20 minutes, and the pH of the water was measured. For reference, as a comparative example, the same igneous rock as used in Example 1 that was not fired was also immersed in water, and the pH of the water was measured. The water pH before immersing the paving stones was almost neutral at 7.7.

実施例1…………9.8
実施例2…………9.7
実施例3…………9.6
実施例4…………9.7
実施例5…………9.3
実施例6…………9.2
実施例7…………9.2
実施例8…………9.5
比較例……………7.6
Example 1 9.8
Example 2 9.7
Example 3 9.6
Example 4 9.7
Example 5 9.3
Example 6 9.2
Example 7 9.2
Example 8 9.5
Comparative Example 7.6

以上のように、実施例で試作した敷石は、浸漬した水のpHが極めて強いアルカリ性を示した。これに対して、焼成しない火成岩は、pHが7.6とほぼ中性となり、表面に付着する水をアルカリ性にできないことが明かとなった。   As described above, the paving stones experimentally manufactured in the examples exhibited extremely strong alkaline properties in which the pH of the immersed water was extremely high. On the other hand, the igneous rocks that were not fired had a pH of about 7.6, which was almost neutral, and it became clear that water adhering to the surface could not be made alkaline.

さらに、実施例1〜8で試作した敷石と、比較例の敷石を、実際に地面に敷設して、雑草が繁殖する状態を観察すると、実施例1〜8の敷石は、3年経過後も雑草は全く繁殖しなかった。これに対して、比較例の敷石は、3年経過後に多量の雑草が繁殖した。ただし、実験は、敷設場所を、風雨に晒されて、かつ太陽がよくあたり、さらに、付近に雑草が繁殖した山間部とした。   Furthermore, when the paving stones prototyped in Examples 1 to 8 and the paving stones of the comparative example were actually laid on the ground and the state in which weeds propagated was observed, The weeds did not reproduce at all. On the other hand, in the paving stones of the comparative example, a large amount of weeds propagated after three years. However, in the experiment, the laying place was set in a mountain area where the area was exposed to the wind and rain, the sun hit well, and weeds bred in the vicinity.

本発明の雑草の繁殖を防止する敷石の使用状態を示す断面図Sectional drawing which shows the use condition of the paving stone which prevents the propagation of the weeds of this invention

符号の説明Explanation of reference numerals

1…敷石
2…地面
1 ... paving stone 2 ... ground

Claims (4)

カルシウムを含有する火成岩を破砕する工程で発生する火成岩粉末と、コンクリートの骨材に使用される砕石を人工的に製造する工程で、天然石を破砕して砕石を分離したときに発生する粉末残渣とを混合して粒状に成形し、成形された原料粒を焼成してカルシウムを表面に移行させることを特徴とする雑草の繁殖を防止する敷石の製造方法。 The igneous rock powder generated in the process of crushing igneous rock containing calcium and the powder residue generated when crushing natural stone and separating crushed stone in the process of artificially manufacturing crushed stone used for aggregate of concrete A method for preventing the propagation of weeds, characterized in that calcium is transferred to the surface by mixing and shaping the raw material particles into granules. 火成岩粉末と粉末残渣の成形品を、850〜1300℃で焼成する請求項1に記載される雑草の繁殖を防止する敷石の製造方法。 The method for producing a cobblestone for preventing the propagation of weeds according to claim 1, wherein the molded product of igneous rock powder and powder residue is fired at 850 to 1300 ° C. 火成岩粉末の混合量が10〜70重量%である請求項1に記載される雑草の繁殖を防止する敷石の製造方法。 The method according to claim 1, wherein the igneous rock powder is mixed in an amount of 10 to 70% by weight. 火成岩粉末と粉末残渣とを多孔質な状態に成形して焼成する請求項1に記載される雑草の繁殖を防止する敷石の製造方法。 2. The method for producing a cobblestone for preventing weed propagation according to claim 1, wherein the igneous rock powder and the powder residue are formed into a porous state and fired.
JP2004039085A 2004-02-16 2004-02-16 Method for producing paving stones to prevent weed breeding Expired - Fee Related JP3806122B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006092393A (en) * 2004-09-27 2006-04-06 Toa Corp Area intrusion material detector, face detection type pressure sensitive unit and crime-prevention system
JP2007143443A (en) * 2005-11-25 2007-06-14 Jobu Sangyo Kk Granular stone material for controlling germination of plant seed, method for producing the grain stone material, and usage of the grain stone material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006092393A (en) * 2004-09-27 2006-04-06 Toa Corp Area intrusion material detector, face detection type pressure sensitive unit and crime-prevention system
JP4559807B2 (en) * 2004-09-27 2010-10-13 ティーオーエー株式会社 Area intruder detection device, surface detection type pressure sensitive unit and crime prevention system
JP2007143443A (en) * 2005-11-25 2007-06-14 Jobu Sangyo Kk Granular stone material for controlling germination of plant seed, method for producing the grain stone material, and usage of the grain stone material

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