JP3973202B2

JP3973202B2 - Method of utilizing road cleaning sand as spraying material for mortar or other greening sprays or greening sprays

Info

Publication number: JP3973202B2
Application number: JP2002182251A
Authority: JP
Inventors: 廣司高橋; 範行高橋; 良助本多
Original assignee: 上毛緑産工業株式会社
Priority date: 2002-06-21
Filing date: 2002-06-21
Publication date: 2007-09-12
Anticipated expiration: 2022-06-21
Also published as: JP2004027529A

Description

【０００１】
【発明が属する技術分野】
本発明は、道路清掃砂を法面緑化吹付け工事やモルタル又はコンクリート吹付け工の吹付け材料に活用する工法に関するものである。
【０００２】
【従来の技術】
一般に降雪の多い地域は市街又は郊外を問わず舗装道路に積雪があると、自動車のスリップ防止のために多量の砂状物を積雪の上に散布することが行われている。そして、積雪が解けると撒布した砂状物が他のゴミと共に道路に残る。これをそのまま放置しておくと、逆に自動車のスリップの原因となる。また強風や走行する自動車の風圧によって飛散して公害の原因となっている。そして、道路清掃車で集められたゴミには当然に砂状物が含まれている。そこで、関係自治体にあっては、道路管理者が道路に撒布された“粉塵から粒状の砂状物”（これを道路清掃砂というが、以下単に「清掃砂」という）を道路清掃車で撒水しながら回収しているが、再利用する途がないのが現状であるため埋め立て処分をしている。
【０００３】
【発明が解決しようとする課題】
ところが、道路管理者によって集められた清掃砂の処理するために処分地の確保に苦慮しているのが現状である。そして、清掃砂の性状は、粉塵状から粒状の砂がほとんどであるが、その砂状物に複数の不純物が混ざっている。また、清掃時の散水で収集したものを排出するときには、かなりの水分を含んでいる。
【０００４】
そこで、本発明は従来の課題を解決するために提供するものであり、その発明の第１は道路清掃砂をモルタル等吹付工の吹付材料に活用する工法において、路面に滞留している清掃砂を道路清掃車の回転ブラシで掃き寄せながら吸引機構によって吸引してゴミ集積部に収容した後、当該清掃砂を篩体にかけてゴミ等の不純物を取除いて清掃砂だけを取り出し、当該道路清掃砂を単独で、又は他の混合物と一緒に乾燥機に投入して含水率４０％程度に仕上げて乾燥清掃砂にした後、その乾燥清掃砂とセメントと混合し、又は乾燥清掃砂とセメントと砂利と混合して法面の筋梁層又は排水用水路層の造成用材としたものである。
【０００５】
本発明の第２は道路清掃砂をモルタル等吹付工の吹付材料に活用する工法において、路面に滞留している清掃砂を道路清掃車の回転ブラシで掃き寄せながら吸引機構によって吸引してゴミ集積部に収容した後、当該清掃砂を篩体にかけてゴミ等の不純物を取除いて清掃砂だけを取り出し、当該道路清掃砂を単独で、又は他の混合物と一緒に乾燥機に投入して含水率４０％程度に仕上げて乾燥清掃砂ににした後、当該乾燥清掃砂に肥料、肥料兼粘着材等を混合し、これを発酵・熟成・堆肥化して緑化基盤材としたものである。
【０００６】
本発明の第３は第１の発明に係る道路清掃砂をモルタル等吹付工の吹付材料に活用する工法において、重量比がセメント１．０：乾燥砂４．０の割合で混合すると共に水を加えてスラリーを作り、これをコンプレッサで空気圧送し、且つモルタル吹付け機で吹付けることによって法面の筋梁層又は排水用水路層として１５Ｎ／ｍｍ²以上の強度を有するように設定したものである。
【０００７】
本発明の第４は第１の発明に係る道路清掃砂をモルタル等吹付工の吹付材料に活用する工法において、重量比がセメント１．０：乾燥砂３．０の割合で混合し、モルタル吹付け機を用い、且つ且つコンプレッサで空気圧送し、吐出ホース先端のノズル部で高圧水と混合して吹付けをし、法面保護構造物として１５Ｎ／ｍｍ²以上の強度を有するように設定したものである。
【０００８】
本発明の第５は第１の発明に係る道路清掃砂をモルタル等吹付工の吹付材料に活用する工法において、セメントと乾燥清掃砂をコンプレッサで空気圧送し、且つモルタル吹付け機によって、ホース先端のノズル部で高圧水を混合しながら吹付けて、法面のモルタル又はコンクリート筋梁工や法面緑化工事における排水処理工を造成したものである。
【０００９】
本発明の第６は第２の発明に係る道路清掃砂を緑化吹付工の吹付材料に活用する工法において、緑化基盤材をコンプレッサによって空気圧送し、コンクリートポンプ車に設置したブームを延伸して旋回を行いながら、遠隔操作によって当該ブームを吹付け作業に適する距離で吐出ホース先端のノズル部で高圧水と混合して吹付けて緑化基盤層を成形したものである。
【００１０】
【実施例】
本発明の実施例は次のとおりである。図１及び図２において、１は道路清掃車であり、市街地や郊外の舗装道路等の路面Ａに滞留しているゴミを含む清掃砂を道路清掃車１の回転ブラシで２で掃き寄せながら吸引機構３で吸引して道路清掃車の内部における所定のゴミ集積部４に一時収容するようになっている。図３において、５は道路清掃車１のゴミ集積部４から排出したゴミＢから清掃砂だけを選別するための篩体であり、設定の振動機構を具備した篩機又は手動の篩器がある。その篩体の網目は５ｍｍ角のスクリーンとする。６は道路清掃車１のゴミ集積部４から排出したゴミＢから篩体５によって不純物を取除いて選別した清掃砂であり、必要に応じて容器７に収容してある。
【００１１】
図４において、８は前記の清掃砂６を乾燥させるためのキルン式の乾燥機であり、この乾燥機で清掃砂を含水率４０％程度に乾燥した状態に仕上げて乾燥砂９を得る。１０はコンニャクの飛粉を用いた肥料兼粘着材、１１はコーティング肥料であり、この三者９・１０・１１を発酵・熟成・堆肥化して緑化基盤材１２を形成する。１３当該緑化基盤材１２を収納する発酵促進を兼ねる収容袋であり、この収容袋は袋内で前記三者９・１０・１１を発酵促進したり、又は発酵をさらに促進したりする機能を具備している。
【００１２】
１４はホッパー付き混合機、１５はコンベヤ、１６はモルタル吹付け機、１７は緑化吹付材の供給ホース、１８はホース先端のノズル部、１９はコンプレッサ、２０は動力噴霧機、２２は供給管２１を介して前記噴霧機に接続する貯水タンク、２４は供給管２３を介して当該貯水タンクに接続する揚水ポンプ、２５は水源であり、吸水管２５で揚水ポンプに給水するようになっている。
【００１３】
図５において、２６はコンクリートポンプ車であり、吹付け機（図示省略）が搭載されている。２７は旋回できるクレーンのコラム、２８はコラムに連結されている折り畳み・伸縮式のブーム、２９は吐出ホース、３０は噴射ノズル、３１はノズルの自在継ぎ手であり、そのノズルの上下動・左右動の伝動機構３２（図示一部省略）によって自由に首振りができるようになっている。図中３３はキャタピラ、３４はアウトリガー、３５は運転席を示す。
【００１４】
【具体的な施工例】
「コンニャクの飛粉による種子吹付工法における植生基盤の形成」
本願出願人が先に提供した特公昭60−46923号(特許第1322986号)における発明において、植生基盤の製造工程に緑化基盤材の一部として山砂（洗砂）を用いるが、この山砂の代わりに本願発明に係る清掃砂６を用いる。
【００１５】
上記工法の施工例を図４によって説明する。第１工程として清掃砂６を乾燥させた乾燥清掃砂９を用い、これに肥料（粒状固形・高度化成、及び石灰肥料）１０、肥料兼粘着材としてコンニャクの飛粉肥料（ピーエムザイ＝登録商標）１１を用い、これを発酵・熟成・堆肥化して緑化基盤材１２を作って収容袋１３に収納する。第２工程として、緑化基盤材１２をホッパー付き混合機１４に投入して混合し、さらにコンベヤ１５で移送した後、モルタル吹付け機１６に投入して水を加え、撹拌混合して粘性のあるスラリーを作り、これを前記吹付け機及びコンプレッサ１９を介して供給ホース１７を通じてノズル部１８の噴射によって法面Ｃに吹き付けて厚さ１０cmの植生基盤層Ｄを形成する。
【００１６】
次にコンクリートポンプ車による施工例を図５によって説明する。第１工程と第２工程の途中までは前記「００１４」と同じである。第２工程のコンクリートポンプ車２６に搭載してある吹付け機及びコンプレッサ１９を介して吐出ホース２９に送り、ノズルの自在継ぎ手３１によって上下・左右に首振り調節した後、ノズル３０から目的の個所に緑化基盤材１２を噴射させる。
【００１７】
「裸地法面のモルタル・コンクリート筋梁工法、法面緑化工事における排水処理方法による植生基盤層の造成」
次に裸地法面の緑化用モルタル・コンクリート筋梁工法(特許第1853350号)や、法面緑化工事における排水処理方法(特許第1522804号)の発明において、筋梁層αの吹付け材料や水路層βの施工に山砂（洗砂）の代わりに本願発明に係る清掃砂６を乾燥させた乾燥砂９を用いる。この場合は、セメント１．０：乾燥砂４．０の割合で混合する。なお、当該両工法の植生基盤層Ｄの造成に使用する山砂（洗砂）の代わりにも清掃砂６を用いるものである。
【００１８】
「在来公知の法面保護構造物の造成」
在来から一般的に行われているモルタル又はコンクリート吹付け工による法面保護構造物の施工に当たって、山砂（洗砂）で一定範囲の粒度分布のものが使用されている。そのときの重量配合は、セメント１.０：洗砂４.０であり、得られる強度は通常１５〜２０Ｎ／ｍｍ²である。これに対して、本発明にあっては、モルタル又はコンクリート吹付け工の際に、洗砂の代わりに清掃砂６を用いる。このときの重量配合は、セメント１．０：清掃砂３.０とし、さらに吹付けノズル部１８の先端部位において水と混合して吹付ける工法（これを「乾式工法」という）で施工することによって在来の強度と同程度の強度１５〜２０Ｎ／ｍｍ²が得ら
れるので、モルタル又はコンクリート吹付け工の使用材料として代用できる。
【発明の効果】
【００１９】
本発明は上記の構成であるから次のような効果がある。すなわち、裸地法面の緑化用モルタル・コンクリート筋梁工法（特許第1853350号）や法面緑化工事における排水処理工（特許第1522804号）の施工の際は、セメント１．０と清掃砂４．０の重量配合にしたことによって目的の高度が得られるから、在来の洗砂の代わりに廃物化して処分に苦慮している清掃砂を有効に活用することができる。
【００２０】
また、在来のモルタル・コンクリート吹付工の施工の際は、セメント１．０：清掃砂３．０の重量配合にし、且つこれを乾式工法で施工することで目的の強度が得られるので、洗砂の代わりに前記同様の清掃砂を有効活用できる。
【図面の簡単な説明】
【図１】本発明に係る道路清掃砂をモルタル吹付け工の構造物に活用するために道路廃棄物を収集する道路清掃車の正面図である。
【図２】図１の側面図である。
【図３】道路の片側にゴミが滞留している状態の横断面図である。
【図４】清掃車で収集したゴミから篩によって清掃砂を取り出して容器に収容している状態の斜視図である。
【図５】モルタル吹付け機で吹付け作業をしている状態の概略説明図である。
【図６】コンクリートポンプ車による緑化基盤材の吹付け状態を示す概略説明図である。
【図７】排水処理工法における水路層の横断面図である。
【図８】モルタル又はコンクリート筋梁層の横断面図である。
【符号の説明】
１道路清掃車
２掃き寄せ用の回転ブラシ
３吸引機構
４ゴミ収容部
５機械式又は手動式の篩体
６清掃砂
７清掃砂の収容容器
８乾燥機
９乾燥砂
１０コンニャクの飛粉肥料
１１コーティング肥料
１２緑化基盤材
１３緑化基盤材の収容袋
１４混合機
１５コンベヤ
１６モルタル吹付機
１７供給ホース
１８ノズル部
１９コンプレッサ
２０動力噴霧機
２２供給管
２１揚水ポンプ
２３貯水タンク
２４水供給管
２５水源
２６コンクリートポンプ車
２７旋回できるコラム
２８折り畳み・伸縮式ブーム
２９吐出ホース
３０噴射ノズル部
Ａ路面
Ｂゴミ[0001]
[Technical field to which the invention belongs]
The present invention relates to a method for utilizing road cleaning sand as a spraying material for slope greening spraying or mortar or concrete spraying.
[0002]
[Prior art]
In general, when there is snow on a paved road in an area where there is a lot of snowfall, regardless of whether it is in the city or in the suburbs, a large amount of sand is scattered on the snow to prevent the car from slipping. And when the snow melts, the sand that has been distributed remains on the road along with other garbage. If this is left as it is, it will cause a slip of the car. Moreover, it is scattered by the strong wind and the wind pressure of the car that runs, causing pollution. Of course, the garbage collected by the road sweeper contains sandy objects. Therefore, in the local governments, the road administrator distributes the “granular sand from dust” (referred to as road cleaning sand, hereinafter simply referred to as “cleaning sand”) with a road cleaning car. However, it is currently being landfilled because there is no way to reuse it.
[0003]
[Problems to be solved by the invention]
However, the present situation is that it is difficult to secure a disposal site in order to process the cleaning sand collected by the road manager. And as for the property of cleaning sand, most of the sand is granular to granular sand, but a plurality of impurities are mixed in the sand. Moreover, when discharging what was collected by watering at the time of cleaning, it contains a considerable amount of water.
[0004]
Therefore, the present invention is provided in order to solve the conventional problems, and the first of the invention is cleaning sand staying on the road surface in a method of utilizing road cleaning sand as a spraying material for spraying such as mortar. After being swept with a rotary brush of a road cleaning car and sucked by a suction mechanism and accommodated in a dust accumulation part, the cleaning sand is applied to a sieve to remove impurities such as dust, and only the cleaning sand is taken out. , Alone or together with other mixtures, into a dryer to finish the water content to about 40% to make dry cleaning sand, then mix with the dry cleaning sand and cement, or dry cleaning sand, cement and gravel It is used as a material for creating a sloped beam layer or drainage channel layer.
[0005]
The second aspect of the present invention is a method for utilizing road cleaning sand as a spray material for spraying mortars, etc., and collecting dust collected by sucking the cleaning sand staying on the road surface with a suction mechanism while sweeping it with a rotating brush of a road cleaning car. After being stored in the section, the cleaning sand is passed through a sieve to remove impurities such as dust, and only the cleaning sand is taken out, and the road cleaning sand alone or together with other mixtures is put into a dryer to contain moisture content. After finishing to about 40% to make dry cleaning sand, fertilizer, fertilizer / adhesive material, etc. are mixed with the dry cleaning sand, and this is fermented, matured and composted to make a greening base material.
[0006]
The third aspect of the present invention is a method for utilizing road cleaning sand according to the first aspect of the present invention as a spray material for spraying mortar and the like. In addition, slurry was made, and it was set to have a strength of 15 N / mm ² or more as a sloped beam layer or drainage channel layer by feeding it pneumatically with a compressor and spraying it with a mortar sprayer. is there.
[0007]
A fourth aspect of the present invention is a method of utilizing road cleaning sand according to the first aspect of the present invention as a spray material for spraying mortar and the like, wherein the weight ratio is mixed at a ratio of cement 1.0: dry sand 3.0, It was set to have a strength of 15 N / mm ² or more as a slope protection structure by using an attaching machine and pneumatically sending with a compressor, mixing with high pressure water at the nozzle part at the tip of the discharge hose and spraying. Is.
[0008]
5th of this invention is a construction method using the road cleaning sand which concerns on 1st invention for the spraying material of spraying works, such as mortar, Cement and dry cleaning sand are pneumatically sent with a compressor, and a mortar spraying machine WHEREIN: It sprays while mixing high-pressure water at the nozzle part of the mortar or mortar on the slope, or concrete drain beam work or drainage treatment work in slope greening work.
[0009]
A sixth aspect of the present invention is a method of utilizing road cleaning sand according to the second aspect of the present invention as a spraying material for a greening sprayer. The greening base material is pneumatically fed by a compressor, and a boom installed on a concrete pump car is extended and turned. The greening base layer is formed by mixing and spraying the boom with high-pressure water at a nozzle portion at the tip of the discharge hose at a distance suitable for spraying operation by remote operation.
[0010]
【Example】
Examples of the present invention are as follows. 1 and 2, reference numeral 1 denotes a road cleaning vehicle, which sucks the cleaning sand containing dust accumulated on the road surface A such as an urban area or a suburban paved road while sweeping it with a rotating brush 2 of the road cleaning vehicle 1. It is sucked by the mechanism 3 and temporarily accommodated in a predetermined dust accumulation part 4 inside the road sweeper. In FIG. 3, 5 is a sieve body for selecting only the cleaning sand from the garbage B discharged from the garbage accumulation part 4 of the road sweeper 1, and there is a sieve equipped with a set vibration mechanism or a manual sieve. . The screen mesh is a 5 mm square screen. 6 is cleaning sand selected by removing impurities from the dust B discharged from the dust collecting portion 4 of the road cleaning vehicle 1 by the sieve body 5 and accommodated in the container 7 as necessary.
[0011]
In FIG. 4, 8 is a kiln-type dryer for drying the cleaning sand 6, and the drying sand 9 is obtained by finishing the cleaning sand to a moisture content of about 40% with this dryer. 10 is a fertilizer / adhesive material using flying powder of konjac, 11 is a coating fertilizer, and the greening base material 12 is formed by fermenting, aging and composting these three. 13 is a storage bag that also serves to promote fermentation and stores the greening base material 12, and this storage bag has a function of promoting the fermentation of the three parties 9, 10, and 11 in the bag or further promoting fermentation. is doing.
[0012]
14 is a mixer with a hopper, 15 is a conveyor, 16 is a mortar sprayer, 17 is a supply hose for greening spray, 18 is a nozzle at the tip of the hose, 19 is a compressor, 20 is a power sprayer, 22 is a supply pipe 21 A water storage tank that is connected to the sprayer via a supply pipe 24, a pumping pump 24 that is connected to the water storage tank via a supply pipe 23, and a water source 25. The water supply pipe 25 supplies water to the pump.
[0013]
In FIG. 5, 26 is a concrete pump vehicle, and a spraying machine (not shown) is mounted. 27 is a column of a crane that can be swung, 28 is a folding / extensible boom that is connected to the column, 29 is a discharge hose, 30 is an injection nozzle, 31 is a universal joint of the nozzle, and the nozzle is moved up and down and left and right. The transmission mechanism 32 (partially omitted in the figure) can swing freely. In the figure, 33 indicates a caterpillar, 34 indicates an outrigger, and 35 indicates a driver's seat.
[0014]
[Specific construction examples]
"Formation of vegetation base in seed spraying method by flying konjac powder"
In the invention in Japanese Patent Publication No. 60-46923 (patent No. 1322986) previously provided by the present applicant, mountain sand (washed sand) is used as part of the greening base material in the vegetation base manufacturing process. Instead of the cleaning sand 6 according to the present invention is used.
[0015]
A construction example of the above construction method will be described with reference to FIG. Using dry cleaning sand 9 obtained by drying cleaning sand 6 as the first step, fertilizer (granular solid, advanced chemical conversion, and lime fertilizer) 10 is used, and konjac flying dust fertilizer (PMEZAI) is used as a fertilizer and adhesive. 11 is fermented, matured and composted to form a greening base material 12 and stored in a storage bag 13. As a second step, the greening base material 12 is put into a mixer 14 with a hopper and mixed, and further transferred by a conveyor 15, and then put into a mortar sprayer 16 to which water is added, stirred and mixed to be viscous. Slurry is made and sprayed onto the slope C by spraying the nozzle part 18 through the supply hose 17 through the sprayer and the compressor 19 to form a vegetation base layer D having a thickness of 10 cm.
[0016]
Next, a construction example using a concrete pump truck will be described with reference to FIG. The process is the same as “0014” until the middle of the first process and the second process. It is sent to the discharge hose 29 via the sprayer and the compressor 19 mounted on the concrete pump car 26 in the second step, and is swung up and down and left and right by the universal joint 31 of the nozzle. The greening base material 12 is sprayed on.
[0017]
“Development of vegetation basement layer by mortar / concrete beam method for bare slope and drainage treatment method for slope planting”
Next, in the invention of the mortar / concrete reinforced concrete beam method (Patent No. 1853350) for greening on the bare slope, and the drainage treatment method (Patent No. 1522804) for slope greening work, Dry sand 9 obtained by drying the cleaning sand 6 according to the present invention is used instead of mountain sand (washed sand) for the construction of the water channel layer β. In this case, the cement 1.0 is mixed at a ratio of 4.0 to dry sand. The cleaning sand 6 is also used in place of the mountain sand (washed sand) used to create the vegetation base layer D of the two methods.
[0018]
"Construction of a well-known slope protection structure"
In the construction of a slope protection structure by mortar or concrete spraying that is generally performed from the past, mountain sand (washed sand) with a particle size distribution in a certain range is used. The weight blending at that time is cement 1.0: sand washing 4.0, and the strength obtained is usually 15 to 20 N / mm ² . In contrast, in the present invention, the cleaning sand 6 is used instead of the sand washing in the mortar or concrete spraying work. The weight blending at this time is cement 1.0: cleaning sand 3.0, and further, it is applied by a method of spraying mixed with water at the tip of the spray nozzle 18 (this is called “dry method”). As a result, a strength of 15 to 20 N / mm ² comparable to the conventional strength can be obtained, so that it can be used as a mortar or concrete spraying material.
【The invention's effect】
[0019]
Since the present invention is configured as described above, the following effects can be obtained. In other words, when constructing a mortar / concrete reinforced concrete beam method (Patent No. 1853350) for greening on a bare slope and drainage treatment (Patent No. 1522804) for slope planting, cement 1.0 and cleaning sand 4 Since the target altitude can be obtained by setting the weight to 0.0, it is possible to effectively use the cleaning sand which is used as waste instead of conventional washing sand and is difficult to dispose of.
[0020]
In addition, when constructing a conventional mortar / concrete sprayer, the desired strength can be obtained by blending the cement 1.0: cleaning sand 3.0 by weight and constructing it by the dry method. Cleaning sand similar to the above can be used effectively instead of sand.
[Brief description of the drawings]
FIG. 1 is a front view of a road cleaning vehicle that collects road waste in order to utilize the road cleaning sand according to the present invention in a structure of a mortar sprayer.
FIG. 2 is a side view of FIG.
FIG. 3 is a cross-sectional view showing a state in which garbage is accumulated on one side of a road.
FIG. 4 is a perspective view of a state in which cleaning sand is taken out from the garbage collected by the cleaning vehicle by a sieve and is stored in a container.
FIG. 5 is a schematic explanatory diagram of a state where a mortar sprayer is performing a spraying operation.
FIG. 6 is a schematic explanatory view showing a sprayed state of a greening base material by a concrete pump car.
FIG. 7 is a cross-sectional view of a water channel layer in the wastewater treatment method.
FIG. 8 is a cross-sectional view of a mortar or concrete reinforcing beam layer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Road sweeper 2 Sweeping rotary brush 3 Suction mechanism 4 Garbage container 5 Mechanical or manual sieve 6 Cleaning sand 7 Cleaning sand container 8 Dryer 9 Dry sand 10 Konjac powder fertilizer 11 Coating Fertilizer 12 Greening base material 13 Greening base material storage bag 14 Mixer 15 Conveyor 16 Mortar sprayer 17 Supply hose 18 Nozzle 19 Compressor 20 Power sprayer 22 Supply pipe 21 Pumping pump 23 Water storage tank 24 Water supply pipe 25 Water source 26 Concrete Pump car 27 Swivel column 28 Folding / telescopic boom 29 Discharge hose 30 Injection nozzle part A Road surface B Garbage

Claims

After the cleaning sand (6) staying on the road surface (A) is swept up by the rotating brush (2) of the road sweeper (1) and sucked by the suction mechanism (3) and stored in the dust accumulation part (4) Apply the cleaning sand to the sieve (5) to remove impurities such as dust, take out only the cleaning sand (6), and put the road cleaning sand alone or together with other mixtures into the dryer (8). Then, after finishing to a moisture content of about 40% to make dry cleaning sand (9), the dry cleaning sand and cement are mixed, or the dry cleaning sand, cement and gravel are mixed, and the streak layer (α ) Or road cleaning sand characterized by the construction of drainage channel layer (β) as a spraying material for sprayers such as mortar.

After the cleaning sand (6) staying on the road surface (A) is swept up by the rotating brush (2) of the road sweeper (1) and sucked by the suction mechanism (3) and stored in the dust accumulation part (4) Apply the cleaning sand to the sieve (5) to remove impurities such as dust, take out only the cleaning sand (6), and put the road cleaning sand alone or together with other mixtures into the dryer (8). After finishing to a moisture content of about 40% and making it into dry cleaning sand (9), fertilizer (10), fertilizer and adhesive (11), etc. are mixed with the dry cleaning sand, and this is fermented, matured and composted. A method of utilizing road cleaning sand, which is characterized by being greening base material (12), as spraying material for greening base.

Mixing at a weight ratio of cement 1.0: dry sand 4.0 and adding water to make a slurry, which is pneumatically fed by a compressor (19) and sprayed by a mortar sprayer. A method of utilizing the road cleaning sand according to claim 1 as a spraying material for spraying mortars or the like, which is set to have a strength of 15 N / mm ² or more as a straight beam layer (α) or a drainage channel layer (β).

The weight ratio is mixed at a ratio of cement 1.0: dry sand 3.0, using a mortar sprayer and pneumatically fed by the compressor (19), and high pressure by the tip nozzle part (29) of the hose (28). A method of using road cleaning sand according to claim 1, which is mixed with water and sprayed, and is set to have a strength of 15 N / mm ² or more as a slope protection structure, as a spray material for spraying such as mortar.

Cement and dry cleaning sand (9) are pneumatically fed by the compressor (19), and sprayed while mixing high pressure water at the tip nozzle part (18) of the hose (17) by the mortar sprayer (16), A method of utilizing road cleaning sand according to claim 1 which is a mortar on a slope or a concrete bracing or a drainage treatment in slope planting, as a spray material for spraying mortars.

The green base material (12) is pneumatically fed by the compressor (19), and the boom (28) installed on the concrete pump truck (26) is stretched and swiveled, and the boom is distanced suitable for spraying operation by remote control. The road cleaning sand according to claim 2, wherein the greening base layer (D) is formed by mixing with high pressure water and spraying at the tip nozzle part (30) of the discharge hose (29) in the spraying material of the greening sprayer. Construction method.