JPH0881672A - Antifreezing agent for road pavement material - Google Patents
Antifreezing agent for road pavement materialInfo
- Publication number
- JPH0881672A JPH0881672A JP24481494A JP24481494A JPH0881672A JP H0881672 A JPH0881672 A JP H0881672A JP 24481494 A JP24481494 A JP 24481494A JP 24481494 A JP24481494 A JP 24481494A JP H0881672 A JPH0881672 A JP H0881672A
- Authority
- JP
- Japan
- Prior art keywords
- chitosan
- pavement
- urea
- pavement material
- freezing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、道路の排水性舗装体又
はグルービング舗装体用凍結防止剤、それらの舗装体の
凍結防止方法及び凍結防止されたそれらの舗装体に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifreezing agent for a road drainage pavement or a grooving pavement, a method for preventing the pavement from freezing, and a pavement protected from freezing.
【0002】[0002]
【従来の技術】開粒度型アスファルト混合物を表層とし
た道路の排水性舗装体は、その高空隙率により、雨水が
すみやかに排水されるので、車輌が走行する場合、降雨
時のハイドロプレーニングの防止、水はね防止、夜間降
雨時の視認性の向上、交通騒音の吸収等の利点を有す
る。従って、このような排水性舗装体は、機能性舗装体
として注目され、その施工件数も年々増加している。一
方、排水性舗装体と同様の機能を有するグルービング舗
装体も年々採用されるようになってきている。この工法
は舗装体表面の横断方向に約20mm間隔で巾6mm、
深さ6mm程度の溝を切り、路面の排水性を向上させる
ものである。しかし、積雪寒冷地の冬期間には、これ等
の舗装体の機能に問題が生ずる。即ち、排水性舗装体で
はその舗装体の空隙内部が雪や氷で満たされ、表面の雪
や氷が融けた水の排水性が悪くなり、夜間にその水が凍
結し、路面が滑りやすくなったり、又、空隙内部に入っ
た水が凍結し、舗装体を崩壊させてしまうと言った問題
が生ずることがある。一方、グルービング舗装では、そ
の舗装体に形成された溝が雪や氷で埋り、排水機能が発
揮できず、路面が雪や氷で滑りやすくなってしまうと言
った問題が生ずる。2. Description of the Prior Art Drainage pavements for roads using an open-grain size asphalt mixture as the surface layer, because of its high porosity, drain rainwater promptly, so when a vehicle is traveling, prevent hydroplaning during rainfall. It has the advantages of preventing water splash, improving visibility at night rainfall, and absorbing traffic noise. Therefore, such a drainage pavement is drawing attention as a functional pavement, and the number of constructions thereof is increasing year by year. On the other hand, grooving pavements having the same function as drainage pavements have also been adopted year by year. This method is 6 mm wide at intervals of about 20 mm in the transverse direction of the pavement surface,
A groove having a depth of about 6 mm is cut to improve drainage performance on the road surface. However, during the winter months in snowy and cold regions, problems occur with the function of these pavements. That is, in the drainage pavement, the interior of the voids of the pavement is filled with snow and ice, the drainage of water on the surface of which snow and ice are melted becomes poor, the water freezes at night, and the road surface becomes slippery. Or, there is a problem that the water that has entered the voids freezes and the pavement is destroyed. On the other hand, in the grooving pavement, the groove formed in the pavement is filled with snow or ice, the drainage function cannot be exerted, and the road surface becomes slippery with snow or ice.
【0003】このような問題点を解決する手段として
は、凍結した路面に塩化ナトリウム、塩化カルシウム、
尿素、酢酸カルシウム・マグネシウムなどの融雪剤を散
布し、排水性舗装体にあってはその空隙内部、グルービ
ング舗装体にあってはその舗装体の溝内に埋っている雪
や氷を融す方法などがある。しかしながら、この方法
は、融雪剤散布後、しばらくの期間は有効であるが、雪
や氷の融解作用が進むに従って、排水性舗装体の空隙や
グルービング舗装体の溝から水でうすまった融雪剤が容
易に流出してしまい、効果の持続性がないという欠点を
有する。従って、度々融雪剤を散布する必要があり、そ
の結果、散布労力の増加や融雪剤散布量の増大に伴う経
済的なデメリットばかりでなく、大量散布によって水質
の汚染、車輌や橋梁物などの腐蝕、あるいは植物に対す
る影響などと言った環境問題も引き起すことになる。As a means for solving such a problem, sodium chloride, calcium chloride,
A method of spraying snow-melting agents such as urea and calcium acetate / magnesium to melt the snow and ice embedded in the voids of drainage pavements and in the grooves of pavements of grooving pavements. and so on. However, this method is effective for a while after spraying the snow-melting agent, but as the melting action of snow and ice progresses, the snow-melting agent diluted with water from the voids of the drainage pavement or the grooves of the grooving pavement. However, it has a drawback that it easily flows out and the effect is not persistent. Therefore, it is necessary to frequently spray the snow-melting agent, and as a result, not only the economical demerits associated with the increase in the spraying labor and the increase in the amount of the snow-melting agent sprayed, but also the water pollution and the corrosion of vehicles and bridges due to the large amount of spraying. It also causes environmental problems such as effects on plants.
【0004】このような問題を解決する方法として、特
開昭63−236802号の方法が提案されている。こ
の方法は、尿素をその融点135℃以上に加熱溶融して
液体とし、排水性舗装体表面に散布し、その空隙内部に
滲透させ、自然冷却により固化させるものである。しか
しながら、この方法では、尿素に雪や氷が接触すると容
易に雪や氷を融かすが、尿素自体も解けた水に高濃度で
溶解する。このとき、舗装体が排水性である為、溶解し
た尿素も流出してしまうという欠点を有する。従って、
この方法の場合、初期効果は期待されるものの、その効
果の持続性は必ずしも充分なものではない。As a method for solving such a problem, a method disclosed in JP-A-63-236802 has been proposed. In this method, urea is heated and melted at a melting point of 135 ° C. or higher to form a liquid, which is sprayed on the surface of the drainage pavement, permeated into the voids, and solidified by natural cooling. However, according to this method, when snow or ice comes into contact with urea, the snow or ice is easily melted, but urea itself is also dissolved at a high concentration in the melted water. At this time, since the pavement is drainable, it has a drawback that dissolved urea also flows out. Therefore,
In this method, the initial effect is expected, but the sustainability of the effect is not always sufficient.
【0005】[0005]
【発明が解決しようとする課題】本発明は、排水性舗装
体やグルービング舗装体用凍結防止剤、それを用いたそ
れら舗装体の凍結防止方法及び凍結防止されたそれら舗
装体を提供することをその課題とする。DISCLOSURE OF THE INVENTION It is an object of the present invention to provide an antifreezing agent for drainage pavements and grooving pavements, a method for antifreezing those pavements using the same, and those antifreeze pavements. Let's take that issue.
【0006】[0006]
【課題を解決するための手段】本発明者らは、前記課題
を解決すべく鋭意研究を重ねた結果、キトサンの酸水溶
液に凍結剤としての尿素とキトサンゲル化剤を溶解させ
た溶液をゲル化反応が完結する前の流動性のあるうちに
排水性舗装体の空隙やグルービング舗装体の溝に流し込
み、内面に吸蔵させてゲル化させるときには、それら舗
装体を効果的にかつ持続性よく凍結防止し得ることを見
出し、本発明を完成するに至った。Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that a solution of a chitosan acid aqueous solution in which urea as a freezing agent and a chitosan gelling agent are dissolved is gelled. Before pouring the reaction, the pavement is effectively and sustainably frozen when it is poured into the voids of the drainage pavement or the groove of the grooving pavement while it is being stored and gelated. They have found that they can be prevented, and have completed the present invention.
【0007】即ち、本発明によれば、キトサンの酸性水
溶液と尿素とキトサンゲル化剤からなる排水性舗装体又
はグルービング舗装体用凍結防止剤が提供される。ま
た、本発明によれば、排水性舗装体又はグルービング舗
装体を凍結防止する方法において、キトサンと尿素とキ
トサンゲル化剤を含む酸性水溶液の未ゲル化溶液をその
舗装体の表面に散布し、舗装体の空隙内部又は溝内部に
流入させ、ゲル化させることを特徴とする舗装体の凍結
防止方法が提供される。さらに本発明によれば、排水性
舗装体の空隙内部に尿素を含むキトサンゲルを吸蔵させ
てなる凍結防止された舗装体が提供される。さらにま
た、本発明によれば、グルービング舗装体の溝内部に尿
素を含むキトサンゲルを吸蔵させてなる凍結防止された
舗装体が提供される。That is, according to the present invention, there is provided an antifreezing agent for drainage pavement or grooving pavement, which comprises an acidic aqueous solution of chitosan, urea and a chitosan gelling agent. Further, according to the present invention, in a method for preventing the drainage pavement or grooving pavement from freezing, a non-gelled solution of an acidic aqueous solution containing chitosan, urea and a chitosan gelling agent is sprayed on the surface of the pavement, There is provided a method for preventing freezing of a pavement, which is characterized by flowing into a void or a groove of the pavement to cause gelation. Further, according to the present invention, there is provided a pavement protected from freezing, which is obtained by occluding chitosan gel containing urea inside the voids of the drainage pavement. Further, according to the present invention, there is provided a pavement which is protected from freezing by occluding chitosan gel containing urea inside the groove of the grooving pavement.
【0008】本発明の凍結防止剤において、そのキトサ
ンの酸性水溶液は、キトサンを酸性水溶液に添加し、溶
解させることによって得ることができる。酸性水溶液と
しては、酢酸、ギ酸、乳酸等の有機酸や、塩酸、硝酸等
の無機酸の如き酸性物質を含む水溶液を挙げることがで
きる。水溶液中の酸性物質の濃度は、0.5〜5重量
%、好ましくは0.7〜3重量%である。また、酸性水
溶液に対するキトサンの添加量は、キトサンの酸性水溶
液中濃度が0.5〜5重量%、好ましくは0.7〜3重
量%となるような量である。キトサンは、カニ、エビな
どの甲殻類やセミ、カブト虫などの昆虫類に多く存在す
るキチンの加水分解物であり、グルコサミンがβ−1,
4結合した天然の多糖類である。酸性水溶液に対する尿
素の添加量は、キトサンを含む酸性水溶液100重量部
に対し、10〜60重量部、好ましくは25〜45重量
部の割合量である。酸性水溶液に対するキトサンゲル化
剤の添加量は、キトサン1重量部に対して3〜33重量
部、好ましくは6〜24重量部となるような割合であ
る。キトサンゲル化剤としては、キトサンと反応し、キ
トサンを架橋化又は不溶化し、ゲル化させ得るものであ
ればどのようなものでもよく、従来公知の各種のものが
用いられる。このようなものとしては、一般的には、ア
セトアルデヒド、ホルムアルデヒド、グルタルアルデヒ
ド、プロピオンアルデヒド等のアルデヒド化合物が用い
られる。In the antifreezing agent of the present invention, the acidic aqueous solution of chitosan can be obtained by adding chitosan to the acidic aqueous solution and dissolving it. Examples of the acidic aqueous solution include aqueous solutions containing an organic acid such as acetic acid, formic acid and lactic acid, and an acidic substance such as inorganic acid such as hydrochloric acid and nitric acid. The concentration of the acidic substance in the aqueous solution is 0.5 to 5% by weight, preferably 0.7 to 3% by weight. The amount of chitosan added to the acidic aqueous solution is such that the concentration of chitosan in the acidic aqueous solution is 0.5 to 5% by weight, preferably 0.7 to 3% by weight. Chitosan is a hydrolyzate of chitin that is often found in crustaceans such as crabs and shrimps, and insects such as cicadas and beetles. Glucosamine has β-1,
It is a 4-linked natural polysaccharide. The amount of urea added to the acidic aqueous solution is 10 to 60 parts by weight, preferably 25 to 45 parts by weight, based on 100 parts by weight of the acidic aqueous solution containing chitosan. The amount of the chitosan gelling agent added to the acidic aqueous solution is 3 to 33 parts by weight, preferably 6 to 24 parts by weight, relative to 1 part by weight of chitosan. As the chitosan gelling agent, any agent may be used so long as it can react with chitosan to crosslink or insolubilize chitosan to cause gelation, and various conventionally known agents are used. Aldehyde compounds such as acetaldehyde, formaldehyde, glutaraldehyde, and propionaldehyde are generally used as such compounds.
【0009】本発明の凍結防止剤は酸性水溶液とキトサ
ンと尿素とキトサンゲル化剤からなるものであるが、こ
の場合、キトサンと尿素はあらかじめ酸性水溶液に溶解
させておくのが好ましく、キトサンゲル化剤は、作業現
場において道路舗装体を凍結防止する直前に添加する。
もちろん、作業現場において、酸性水溶液にキトサンと
尿素とキトサンゲルを添加することによって得ることも
できる。The antifreezing agent of the present invention comprises an acidic aqueous solution, chitosan, urea and a chitosan gelling agent. In this case, it is preferable to dissolve chitosan and urea in the acidic aqueous solution in advance to form a chitosan gel. The agent is added at the work site immediately before freezing the road pavement.
Of course, it can also be obtained by adding chitosan, urea and chitosan gel to an acidic aqueous solution at the work site.
【0010】本発明の凍結防止剤は、キトサンゲル化剤
の添加によりキトサンのゲル化(高分子化)反応が開始
するが、キトサンゲル化剤添加後一定時間の間は溶液は
流動性を有し、スプレーノズルにより散布可能なもので
ある。キトサンゲル化剤添加後、一定時間経過後には、
キトサンのゲル化反応が終了し、溶液全体は半固形状の
ゲル化物となる。キトサンゲル化剤を添加した溶液がゲ
ル化物となるまでの時間(ゲル化反応時間)は、溶液中
のキトサン濃度と添加するキトサンゲル化剤の添加量等
により変化させることができ、一般的には、5分〜1時
間である。このようなゲル化反応時間内においては、溶
液は流動性を有し、散布することができる。所望するゲ
ル化反応時間は、実際の散布作業時間に応じて適当に選
定される。The antifreezing agent of the present invention starts the gelling (polymerization) reaction of chitosan by the addition of the chitosan gelling agent, but the solution is fluid for a certain period of time after the addition of the chitosan gelling agent. However, it can be sprayed by a spray nozzle. After addition of chitosan gelling agent, after a certain period of time,
The gelation reaction of chitosan is completed, and the whole solution becomes a semi-solid gelled product. The time until the solution containing the chitosan gelling agent becomes a gelled product (gelling reaction time) can be changed depending on the concentration of chitosan in the solution and the amount of the chitosan gelling agent added, etc. Is 5 minutes to 1 hour. Within such gelling reaction time, the solution has fluidity and can be sprayed. The desired gelling reaction time is appropriately selected according to the actual spraying work time.
【0011】道路舗装体に対する凍結防止剤の散布量
は、舗装体の種類や気象条件等によって異なるが、通
常、1m2当り200〜500mlという少量で充分で
ある。散布方法は特に制約されず、スプレーノズルを有
する液体散布装置を用いて行うことができる。要する
に、舗装体表面に均一に凍結防止剤を散布し得る方法で
あればどのような散布方法であってもよい。舗装体表面
に散布された溶液状の凍結防止剤は、排水性舗装体の空
隙やグルービング舗装体の溝に滲透し、その内部でゲル
化し、その空隙や溝の内面に吸蔵(付着)される。舗装
体の空隙や溝の内面に吸蔵したゲル化物は、内部に尿素
を含有するキトサンゲルからなるもので、尿素はそのキ
トサンゲルによって保護されている。従って、雪や氷、
水と接触しても尿素の溶出は防止され、その凍結防止効
果は長期にわたって持続する。The amount of the antifreezing agent applied to the road pavement varies depending on the type of pavement, weather conditions, etc., but a small amount of 200 to 500 ml per 1 m 2 is usually sufficient. The spraying method is not particularly limited, and it can be performed using a liquid spraying device having a spray nozzle. In short, any spraying method may be used as long as it can uniformly spray the antifreezing agent on the surface of the pavement. The solution-type antifreezing agent sprayed on the pavement surface permeates into the voids of the drainage pavement and the grooves of the grooving pavement, gels inside, and is occluded (adhered) to the inner surfaces of the voids and grooves. . The gelled substance occluded in the inner surface of the void or groove of the pavement is made of chitosan gel containing urea therein, and the urea is protected by the chitosan gel. Therefore, snow and ice,
Even when it comes into contact with water, the elution of urea is prevented, and its antifreezing effect lasts for a long time.
【0012】本発明の凍結防止剤を吸蔵させた排水性舗
装体やグルービング舗装体はそれらの舗装体表面に雪が
積っても、舗装体表面と接するところで、雪が融け、そ
の水は、凍結することなく容易に舗装体の空隙や溝を通
って排水される。また、舗装体表面に雪や氷が固結する
ことがないので、車輌の通行によって雪や氷が容易に剥
離され、舗装体面が露出しやすくなると言う効果もあ
る。In the drainage pavement or grooving pavement containing the antifreezing agent of the present invention, even if snow accumulates on the surface of the pavement, the snow melts at the point of contact with the surface of the pavement and the water freezes. Drains easily through voids and ditches in the pavement without. Further, since snow and ice do not solidify on the surface of the pavement, snow and ice can be easily peeled off by the passage of a vehicle, and the pavement surface can be easily exposed.
【0013】[0013]
【実施例】次に、本発明を実施例によりさらに詳細に説
明する。 (1)凍結防止剤の調製とゲル化反応時間 キトサンの酸性水溶液を調製するに当っては、キトサン
濃度と酸濃度が同一になるように調製した。先ず、酢酸
0.7wt%水溶液に、キトサン粉末を、キトサン濃度
0.7wt%になる量を添加し、溶解させた。この水溶
液に工業用尿素を投入し、尿素濃度が30wt%になる
ように調製した。このキトサン−尿素水溶液にグルター
ルアルデヒドを10%濃度になる量を添加し、溶液がゲ
ル化するまでの時間を測定した。以上と同じ要領で、キ
トサン濃度を変えたキトサン−尿素水溶液を調製し、グ
ルタールアルデヒドを添加してから溶液が半固形状態に
ゲル化するまでの時間を測定した。その結果を表1に示
す。EXAMPLES Next, the present invention will be described in more detail by way of examples. (1) Preparation of antifreezing agent and gelation reaction time In preparing an acidic aqueous solution of chitosan, the chitosan concentration and the acid concentration were adjusted to be the same. First, chitosan powder was added to and dissolved in a 0.7 wt% aqueous solution of acetic acid in an amount to give a chitosan concentration of 0.7 wt%. Industrial urea was added to this aqueous solution to prepare a urea concentration of 30 wt%. An amount of glutaraldehyde having a concentration of 10% was added to the chitosan-urea aqueous solution, and the time until the solution gelled was measured. In the same manner as above, a chitosan-urea aqueous solution having different chitosan concentrations was prepared, and the time from the addition of glutaraldehyde to the gelation of the solution into a semi-solid state was measured. The results are shown in Table 1.
【0014】[0014]
【表1】 以上の結果から、アルデヒドに対するキトサンの比率が
高くなる程、ゲル化する時間が短かくなる。[Table 1] From the above results, the higher the ratio of chitosan to aldehyde, the shorter the gelling time.
【0015】(2)凍結防止剤の吸蔵と凍結防止効果 (排水性舗装体の試験体の作製)排水性舗装体の作製
は、アスファルト混合物の特性を調べる一般的方法であ
るマーシャル安定度試験に用いる供試体の作製法に準じ
て行った。試験体1個当りの骨材とアスファルトの配合
比率を表2に示す。(2) Storage of antifreezing agent and antifreezing effect (Preparation of test specimen of drainage pavement) Preparation of drainage pavement is carried out by Marshall stability test, which is a general method for examining the characteristics of asphalt mixture. The process was carried out according to the method for producing the specimen to be used. Table 2 shows the mixing ratio of the aggregate and the asphalt per one test body.
【0016】[0016]
【表2】 排水性舗装体の試験体の作製は、次の手順に従って行っ
た。先ず、表2に記載する各骨材をミキサーに投入し、
180℃に加熱混合する。次にあらかじめ160℃に予
熱したアスファルトを添加し、さらに188℃で加熱混
合する。このようにして得られたアスファルト混合物を
マーシャル試験供試体作製用シリンダーに入れ、170
℃で表裏を突き固め、自然冷却後、シリンダーより抜取
り、直径100mm、厚さ70mmの試験体を得た。こ
の排水性舗装体の試験体の空隙率は約20vol%であ
った。[Table 2] The test body of the drainage pavement was manufactured according to the following procedure. First, add each of the aggregates listed in Table 2 to a mixer,
Heat and mix to 180 ° C. Next, asphalt preheated to 160 ° C. is added, and further mixed by heating at 188 ° C. The asphalt mixture thus obtained was placed in a cylinder for producing a Marshall test specimen, and 170
The front and back were compacted at 0 ° C., naturally cooled, and then removed from the cylinder to obtain a test body having a diameter of 100 mm and a thickness of 70 mm. The porosity of the test body of this drainage pavement was about 20 vol%.
【0017】(凍結防止試験)以上のようにして作製し
た試験体の底部と側面部を樹脂フィルムでシールし、表
1に記載の凍結防止剤A〜Dを試験体の表面から流し込
み、空隙内部でゲル化させ吸蔵させた。充分ゲル化させ
た後、試験体表面から水を注ぎ、空隙を満した。比較の
為に、凍結防止剤を吸蔵させなかった試験体にも表面か
ら水を注ぎ、空隙を水で満した。これ等試験体を−5℃
の冷蔵庫に一昼夜放置した。その後、これ等試験体を転
倒して、30分間保持し、凍結しなかった水を回収し、
凍結防止効果について調べた。その結果を表3に示す。(Anti-freezing test) The bottom and side surfaces of the test piece prepared as described above are sealed with a resin film, and the anti-freezing agents A to D shown in Table 1 are poured from the surface of the test piece to form the inside of the void. It was made to gel and occluded. After the gel was sufficiently gelled, water was poured from the surface of the test body to fill the voids. For comparison, water was poured from the surface of the test body that did not contain the antifreezing agent, and the voids were filled with water. These test bodies are -5 ℃
I left it in the refrigerator for 24 hours. After that, these test bodies are tumbled and held for 30 minutes to collect water that has not frozen,
The antifreezing effect was investigated. Table 3 shows the results.
【0018】[0018]
【表3】 [Table 3]
【0019】凍結防止剤を吸蔵しなかった試験体は空隙
内で水が凍結し、水は回収されなかったが、その他の試
験体はいずれも空隙内部で、水は凍結することはなかっ
た。凍結防止剤吸蔵量が比較的多い試験体A及びBに再
び水を注入し、同様の試験を繰返し行った。この結果を
表4に示す。Water was frozen in the voids of the test bodies that did not occlude the antifreezing agent, and no water was recovered. However, in all the other test bodies, the water did not freeze inside the voids. Water was injected again into the test bodies A and B having a relatively large storage amount of the antifreezing agent, and the same test was repeated. Table 4 shows the results.
【0020】[0020]
【表4】 [Table 4]
【0021】以上の結果から吸蔵された凍結防止剤は、
容易には流出せず、効果の持続性について確認された。From the above results, the antifreeze agent occluded is
It did not flow easily, and the sustainability of the effect was confirmed.
Claims (5)
ゲル化剤からなる排水性舗装体又はグルービング舗装体
用凍結防止剤。1. An antifreezing agent for drainage pavement or grooving pavement, which comprises an acidic aqueous solution of chitosan, urea and a chitosan gelling agent.
ある請求項1の舗装体用凍結防止剤。2. The antifreezing agent for pavements according to claim 1, wherein the chitosan gelling agent is an aldehyde compound.
凍結防止する方法において、キトサンと尿素とキトサン
ゲル化剤を含む酸性水溶液の未ゲル化溶液をその舗装体
の表面に散布し、舗装体の空隙内部又は溝内部に流入さ
せ、ゲル化させることを特徴とする舗装体の凍結防止方
法。3. A method for preventing freezing of a drainage pavement or a grooving pavement, wherein a non-gelled solution of an acidic aqueous solution containing chitosan, urea and a chitosan gelling agent is sprayed on the surface of the pavement, A method of preventing freezing of a pavement, which comprises causing gelation by flowing into voids or grooves.
トサンゲルを吸蔵させてなる凍結防止された舗装体。4. An anti-freezing pavement in which a chitosan gel containing urea is occluded inside the voids of the drainage pavement.
むキトサンゲルを吸蔵させてなる凍結防止された舗装
体。5. A pavement protected from freezing, which is obtained by occluding chitosan gel containing urea inside the groove of the grooving pavement.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24481494A JPH0881672A (en) | 1994-09-12 | 1994-09-12 | Antifreezing agent for road pavement material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24481494A JPH0881672A (en) | 1994-09-12 | 1994-09-12 | Antifreezing agent for road pavement material |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0881672A true JPH0881672A (en) | 1996-03-26 |
Family
ID=17124355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24481494A Pending JPH0881672A (en) | 1994-09-12 | 1994-09-12 | Antifreezing agent for road pavement material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0881672A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102175568A (en) * | 2011-01-21 | 2011-09-07 | 长安大学 | Device for evaluating longer-term snow-melting property of salinization matter for automatically melting snows on road surface |
CN102533222A (en) * | 2011-07-06 | 2012-07-04 | 大连工业大学 | Antifreezing snow melting agent and preparation method thereof |
CN104893662A (en) * | 2015-04-14 | 2015-09-09 | 中国科学院化学研究所 | Charged surface-possessing material capable of adjusting freezing temperature of condensed water, preparation method and application thereof |
JP2018035302A (en) * | 2016-09-01 | 2018-03-08 | 第一工業製薬株式会社 | Antifreezing agent |
-
1994
- 1994-09-12 JP JP24481494A patent/JPH0881672A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102175568A (en) * | 2011-01-21 | 2011-09-07 | 长安大学 | Device for evaluating longer-term snow-melting property of salinization matter for automatically melting snows on road surface |
CN102533222A (en) * | 2011-07-06 | 2012-07-04 | 大连工业大学 | Antifreezing snow melting agent and preparation method thereof |
CN104893662A (en) * | 2015-04-14 | 2015-09-09 | 中国科学院化学研究所 | Charged surface-possessing material capable of adjusting freezing temperature of condensed water, preparation method and application thereof |
JP2018035302A (en) * | 2016-09-01 | 2018-03-08 | 第一工業製薬株式会社 | Antifreezing agent |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104877635B (en) | A kind of emulsified asphalt environmentally friendly composite snow-melting agent and preparation method thereof and application method | |
US7879254B2 (en) | Snow removal agent and preparation method | |
CN101629065A (en) | Environment protection snow-dissolved agent and preparation method thereof | |
CN104073221A (en) | Environment-friendly non-chlorine-salt snow melting and deicing agent and preparation method thereof | |
JP2981458B2 (en) | Freezing control material and method of controlling freezing of pavement surface | |
JPH0881672A (en) | Antifreezing agent for road pavement material | |
CN1194062C (en) | Combination of snow melt and melting ice as well as its preparation method and application | |
US4936915A (en) | Porous inert road grit | |
JP4960794B2 (en) | Pavement water retention material and pavement | |
CN100357386C (en) | Antifreezing agent composition and its production process | |
JP5920753B1 (en) | Liquid antifreeze | |
JPH10140130A (en) | Road deicer | |
JPH06146207A (en) | Thawing and freezing prevention pavement of road | |
JPH06101214A (en) | Antifreezing method for road | |
JP3524052B2 (en) | Subbase construction method | |
CN107044082B (en) | Environment-friendly ceramsite concrete ice-melting and snow-melting pavement and preparation method thereof | |
JPH09132902A (en) | Freezing restraint construction method of draining pavement | |
JP4292467B2 (en) | Method of injecting snow melting agent into pavement material and pavement material infused with snow melting agent | |
JPH09316804A (en) | Freezing suppressing material, freezing suppressing sand gel, freezing suppressing pavement and method for suppressing freezing of paved road surface | |
CN114292624B (en) | Solid snow-melting agent, and preparation method, application method and application thereof | |
CN108084966A (en) | A kind of environment-friendly snowmelt agent | |
JPH06235205A (en) | Pavement for preventing freezing and paving method thereof | |
KR102459586B1 (en) | Low salt eco-friendly liquid snow removing agent and its manufacturing method | |
JP3050861B1 (en) | Road surface freeze retardant | |
JP2002309232A (en) | Colored, road surface freezing preventing agent and manufacturing method therefor |