JPH0774484B2 - Flow-resistant asphalt pavement material containing coal ash sand - Google Patents
Flow-resistant asphalt pavement material containing coal ash sandInfo
- Publication number
- JPH0774484B2 JPH0774484B2 JP1046820A JP4682089A JPH0774484B2 JP H0774484 B2 JPH0774484 B2 JP H0774484B2 JP 1046820 A JP1046820 A JP 1046820A JP 4682089 A JP4682089 A JP 4682089A JP H0774484 B2 JPH0774484 B2 JP H0774484B2
- Authority
- JP
- Japan
- Prior art keywords
- coal ash
- asphalt
- asphalt pavement
- pavement material
- ash sand
- 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.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、道路舗装材に関するもので、特に耐流動性
状を備えたアスファルト舗装材に関するものである。Description: TECHNICAL FIELD The present invention relates to a road pavement material, and more particularly to an asphalt pavement material having fluidity resistance.
従来、アスファルト舗装路面の耐流動対策として、セミ
プローンアスファルト，ゴム入りアスファルト，熱可塑
性樹脂入りアスファルトなど、ゴム系又は樹脂系の改質
材を添加したいわゆる改質アスファルトと呼ばれるもの
などが使用されている。Conventionally, so-called modified asphalt with rubber-based or resin-based modifier added, such as semi-prone asphalt, asphalt with rubber, and asphalt with thermoplastic resin, has been used as a flow resistance measure for asphalt pavement road surface. There is.
ところが、これら改質アスファルトは、混合物の施工温
度を高温に維持しなければならないこと、転圧時に混合
物がローラに付着しやすいこと、ジョイント部の目地切
れが発生するなど施工上の欠点があり、しかも施工コス
トが高くなるという問題点があった。However, these modified asphalts have drawbacks in construction, such as the temperature of the mixture must be maintained at a high temperature, the mixture tends to adhere to the rollers during compaction, and joint breakage occurs. Moreover, there is a problem that the construction cost becomes high.
また同様に耐流動性をもたせる手段として、アベスト，
メチルセルローズ，消石灰，セメント等を添加し、アス
ファルト舗装材中の軽質油を吸収させる方法や、粒状を
呈する特殊なアスファルト流動防止用吸油材の使用等が
試みられている。Similarly, as a means for imparting flow resistance, abest,
Attempts have been made to add methyl cellulose, slaked lime, cement, etc. to absorb the light oil in the asphalt pavement material, and to use a special asphalt flow-preventing oil-absorbing material that is granular.
例えば、特開昭57−187402号公報および特公昭57−2235
0号公報に開示された粒径が10mm以下の天然骨材又は人
口骨材を種石として、これに粉末ゴム又は熱可塑性樹脂
の単味か両者混合物を、あるいは水硬性材料であるセメ
ント，高炉さいおよび石こうの三種を被覆させたものな
どがそれである。For example, JP-A-57-187402 and JP-B-57-2235.
The natural aggregate or artificial aggregate having a particle size of 10 mm or less disclosed in Japanese Patent Laid-Open Publication No. 0-58200 is used as a seed stone, and powdered rubber or a thermoplastic resin is used alone or a mixture thereof, or a hydraulic material such as cement or blast furnace. That is the one coated with three kinds of dais and gypsum.
しかし、これら公報に開示されたアスファルト流動防止
用吸油材は、通常のアスファルト舗装材よりフィラー分
を多く含んでいる寒冷地用のアスファルト舗装材に添加
使用した場合は、次のような問題点があった。すなわち
舗設作業後、その舗設層の温度が所定の交通開放温度ま
で下がるのを待っても、初期わだちが発生し、いわゆる
流動防止としての効用が発揮されないという問題点があ
った。However, the asphalt flow prevention oil-absorbing material disclosed in these publications has the following problems when it is added to an asphalt pavement material for cold regions that contains a larger amount of filler than a normal asphalt pavement material. there were. That is, even after waiting for the temperature of the pavement layer to drop to a predetermined traffic open temperature after the paving work, there is a problem in that initial ruts are generated and the so-called flow prevention effect is not exhibited.
いずれにしても、前者の改質アスファルトの使用は、そ
の施工性や目地切れ発生などの難点があり、後者の粒状
を呈する流動防止用吸油材は、交通開放の初期わだちに
対して充分な効用を期待することができないといった問
題点があった。すなわち、これら従来の改質アスファル
トや耐流動性吸油材を添加したアスファルト舗装におい
ては、目地切れ、硬化収縮による亀裂、さらには剥離現
象の発生など品質に多くの問題点を内包し、しかも交通
開放時における初期わだちへの対応性に難点がある維持
管理等において補修費等の負担増を余儀なくされてい
た。In any case, the former use of modified asphalt has drawbacks such as its workability and occurrence of joint breakage, and the latter oil-absorbing material for anti-flow that exhibits granularity has a sufficient effect on the initial ruts of traffic opening. There was a problem that I could not expect. In other words, in these conventional asphalt pavements that include modified asphalt and fluid resistant oil-absorbing materials, many quality problems such as joint breaks, cracks due to curing shrinkage, and the occurrence of peeling phenomena are involved, and traffic open At the time of maintenance and management, which had difficulty in responding to early ruts at the time, the burden of repair costs had to be increased.
そこでさらに改良されたアスファルト舗装の耐流動対策
技術の開発が要望されている。特に重車輌交通量の増大
化傾向に対する安全な舗装路面の確保の視点から、その
要望がきわめて高い。Therefore, there is a demand for the development of a further improved anti-flow technology for asphalt pavement. Especially, from the viewpoint of securing a safe paved road surface against the increasing trend of heavy vehicle traffic, the demand is extremely high.
本発明は、このような要望に応えるため、経済性，施工
性にすぐれた耐流動性を発揮するアスファルト舗装材を
提供することを目的とするものである。In order to meet such demands, the present invention has an object to provide an asphalt pavement material exhibiting excellent fluidity and economical efficiency and workability.
とくに、この発明は、これまでに開示されたアスファル
ト流動防止用吸用材が、交通開放の初期わだちに即時対
応することが困難であったことの要因として、水硬性材
料であるセメントを比較的多く使用している点にあるこ
とを解明した。なかでも従来使用されている吸油材は、
吸油材としての機能を発揮すべき吸油材の表皮に形成さ
れた空隙の孔腔が大きいことに起因していることも解明
した。すなわちアスファルト中のオイル分を吸収するた
めの空隙における孔腔の内径が大きくなっているため、
毛細管による吸着力が小さくなっていることである。In particular, the present invention discloses that the asphalt flow prevention absorbent material disclosed so far has a relatively large amount of cement, which is a hydraulic material, as a factor that it was difficult to immediately respond to the initial rubbing of traffic opening. Clarified that it is in use. Among them, the oil-absorbent materials that have been used conventionally are
It was also clarified that it is due to the large pores of the voids formed in the skin of the oil absorbent that should function as an oil absorbent. That is, since the inner diameter of the pore in the void for absorbing the oil content in the asphalt is large,
That is, the suction force of the capillaries is reduced.
さらに、交通開放の初期においては吸着に対する時間的
な余裕がなく、これらの関係から初期わだちに対する対
応性が低くなっていることが、その大きな要因となって
いることが判明した。Furthermore, it was found that there was no time for adsorption in the early stage of the opening of traffic, and the low response to the initial ruts from these relationships was a major factor.
そこで、この発明においては表面積が大きく、しかも吸
水率の高い物質を吸油材として用いることによって、前
記初期わだちに対する対応性の改善を狙ったことにあ
る。Therefore, in the present invention, a substance having a large surface area and a high water absorption rate is used as an oil absorbing material to improve the adaptability to the initial ruts.
そのアスファルト舗装材としての特徴とするところは、 （１）加熱混練したアルファルト混合物に、石炭灰とセ
メントと水を加え混合造粒してなる石炭灰砂を乾燥して
添加混練し、耐流動性を付与したアスファルト舗装材と
したことにある。The features of the asphalt pavement material are as follows: (1) Coal ash, cement and water are added to the heat-kneaded Alfalto mixture, and the coal ash sand obtained by mixing and granulating is dried and added and kneaded to prevent flow. The purpose is to provide an asphalt pavement material with added properties.
（２）また前記石炭灰砂は、石炭灰100重量部に対し
て、セメントを10重量部以上20重量部以下と適量の水又
は少量の増粘剤もしくは水および増粘剤の双方を加え、
粒径が0.074〜1.2mmの粒を70％以上含む粒状材に生成
し、これを養生硬化し、乾燥処理したものを使用したこ
とにある。(2) In addition, the coal ash sand is obtained by adding 10 parts by weight or more and 20 parts by weight or less of cement and an appropriate amount of water or a small amount of a thickener or both water and a thickener to 100 parts by weight of coal ash,
This is because a granular material containing 70% or more of particles having a particle diameter of 0.074 to 1.2 mm was formed, cured and hardened, and dried to be used.
（３）さらにアスファルト混合物に対する石炭灰砂の添
加量は、アスファルト混合物100重量部に対して、２〜1
0重量部添加したことを特徴とするものである。(3) Furthermore, the amount of coal ash sand added to the asphalt mixture is 2 to 1 with respect to 100 parts by weight of the asphalt mixture.
It is characterized by adding 0 part by weight.
（作用） すなわち産業廃棄物を有効に利用してセメントと水およ
び増粘剤とを加えて造粒した石炭灰砂を乾燥して加熱混
練したアスファルト混合物に添加したものであるため、
路盤面や舗装面に敷均し、転圧，締固めて舗設した場
合、次のような作用を発揮した。(Function) That is, since the coal ash sand granulated by adding the cement and water and the thickener by effectively utilizing the industrial waste is added to the asphalt mixture that is dried and heated and kneaded,
When laid on a roadbed or pavement, compacted and compacted, the following effects were exhibited.
まず第１に本発明に使用した石炭灰砂は、先に説明した
従来の吸油材と比較し、多孔質で吸着性、吸水性に優
れ、その表皮には、細かい内径の孔腔を有している。そ
のため短時間でアスファスト中のオイル分を比較的多く
吸着することのできる機能を有している。First of all, the coal ash sand used in the present invention is porous and excellent in adsorptivity and water absorption as compared with the conventional oil-absorbing material described above, and has a pore with a fine inner diameter in its skin. ing. Therefore, it has the function of adsorbing a relatively large amount of oil in asfast in a short time.
そのため、これをアスファルト混合物に添加すると、ア
スファルト混合物中に含まれる軽質油分が効率的に、し
かも短時間で吸着ないし吸収される。そしてアスファル
ト混合物中の主として粗骨材間隙に分散されてアスファ
ルトモルタルの塑性を改良することができた。その結
果、初期わだちに対する対応性が著しく向上され、耐流
動性状の高いアスファルト舗装材としての機能を発揮す
ることができた。Therefore, when this is added to the asphalt mixture, the light oil component contained in the asphalt mixture is efficiently adsorbed or absorbed in a short time. And it was able to improve the plasticity of the asphalt mortar by being dispersed mainly in the coarse aggregate gap in the asphalt mixture. As a result, the adaptability to initial ruts was remarkably improved, and the function as an asphalt pavement material having high fluidity could be exhibited.
第２は前記石炭灰砂の粒径を0.074〜1.2mmと比較的広い
粒度範囲に設定したため、その石炭灰砂がアスファルト
混合物中の粗骨材間隙に均質に分散され、吸油材として
の作用効果が舗装層の内部において均質に発揮された。
その結果、流動防止効果が平均して高められ、舗設路面
として動的安定度の高いアスファルト舗装の舗設を可能
とした。Secondly, since the particle size of the coal ash sand is set to a relatively wide particle size range of 0.074 to 1.2 mm, the coal ash sand is uniformly dispersed in the coarse aggregate gaps in the asphalt mixture, and the effect as an oil absorbent is obtained. Was uniformly exhibited inside the pavement layer.
As a result, the flow prevention effect was enhanced on average, and asphalt pavement with a high degree of dynamic stability could be used as the pavement surface.
次に本発明に係る石炭灰砂を添加したアスファルト舗装
材（Ａ）と、従来一般的に使用されている流動防止用吸
油材を添加したアスファルト舗装材（Ｂ）と、なんら耐
流動用の添加剤を使用しないアスファルト舗装材（Ｃ）
の三種のアスファルト舗装材についてホイールトラッキ
ング試験を行った。Next, the asphalt pavement material (A) to which the coal ash sand according to the present invention is added, the asphalt pavement material (B) to which an oil absorption material for fluidity prevention that has been generally used in the past is added, and any addition for fluidity resistance Asphalt Pavement Material (C)
A wheel tracking test was conducted on the three types of asphalt pavement materials.
下記表−１はその試験結果に基づくDS値の比較一覧であ
る。Table 1 below is a comparison list of DS values based on the test results.
上記表−１に示すように、石炭灰砂を4.0％添加した本
発明によるアスファルト舗装材は、耐流動用添加材とし
て最も普及している流動防止用吸油剤を重量比で6.0％
添加した従来のアスファルト舗装材（Ｂ）と比較し、DS
値が舗設直後において1.4倍、養生期間が60℃/1日で約
２倍、１週間で２倍強に増大している。すなわちアスフ
ァルト舗装材として、きわめて高い耐流動性を発揮する
ことが立証されている。 As shown in Table 1 above, the asphalt pavement material according to the present invention in which coal ash sand is added by 4.0% has a weight ratio of 6.0% by weight of an oil absorption agent for fluidity prevention which is most popular as an additive material for fluidity resistance.
Compared with the added conventional asphalt pavement material (B), DS
The value increased 1.4 times immediately after paving, and the curing period increased to about twice at 60 ° C / day and more than twice at one week. That is, it has been proved that the asphalt pavement material exhibits extremely high flow resistance.
特に、本発明アスファルト舗装材（Ａ）は、石炭灰砂の
添加量がアスファルト添加量に対し67％であるにも拘ら
ず交通開放直後および材令１日で、従来のアスファルト
舗装材（Ｂ）に比較し、２〜３倍のDS値であり、さらに
材令が７日になると約４倍である。したがって、本発明
による石炭灰砂を添加したアスファルト舗装材にあって
は、初期わだち掘れのすくない舗装材として機能するこ
とが理解される。In particular, the asphalt pavement material (A) of the present invention is the same as the conventional asphalt pavement material (B) immediately after the opening of traffic and 1 day of age, although the amount of coal ash sand added is 67% of the amount of asphalt added. The DS value is 2 to 3 times that of the above, and it is about 4 times when the age is 7 days. Therefore, it is understood that the asphalt pavement material to which the coal ash sand according to the present invention is added functions as a pavement material in which initial rutting is less likely to occur.
なお表−２は、前記ホイールトラッキング試験に基づく
養生日数と動的安定度をグラフで表示したものである。Table 2 is a graph showing the number of curing days and the dynamic stability based on the wheel tracking test.
さらに、表−３は、本発明による耐流動性アスファルト
舗装材に添加した石炭灰砂の粒径と、その粒度分布を従
来一般的に使用されている耐流動用添加材のそれと比較
して示すものである。Further, Table 3 shows the particle size of the coal ash sand added to the fluidity-resistant asphalt pavement material according to the present invention, and its particle size distribution in comparison with that of conventionally commonly used fluidity-resistant additive materials. It is a thing.
この表−３で示すように、従来一般的に使用されている
耐流動用添加材は、その粒径が0.15〜5.0mmで、本発明
による耐流動性アスファルト舗装材に添加した石炭灰砂
の粒径0.074〜1.2mmよりも大きい。 As shown in Table-3, conventionally used flow resistant additive material has a particle size of 0.15 to 5.0 mm, and is made of coal ash sand added to the fluid resistant asphalt pavement material according to the present invention. The particle size is larger than 0.074-1.2 mm.
しかも、その粒度分布は、本発明においては、最大1.2m
mの篩目で100％であり、最小0.074mmで30％で、その粒
度分布が広い。これに対し、従来のものは0.15〜5.0mm
が70％と、その粒度分布は狭い。すなわち、本発明にお
いて添加した耐流動性添加材としての石炭灰砂は、粒径
が従来のものに比較し小さく、しかも広い粒度分布のも
のを使用している点に一つの大きな特徴をもっている。Moreover, the particle size distribution is 1.2 m at maximum in the present invention.
It has a wide particle size distribution with 100% in the sieve mesh of m and 30% in the minimum 0.074 mm. In contrast, the conventional one is 0.15 to 5.0 mm
Has a narrow particle size distribution of 70%. That is, the coal ash sand as the fluidity-resistant additive added in the present invention has one of the major characteristics in that it has a smaller particle size than the conventional one and has a broad particle size distribution.
本発明による石炭灰砂を添加した耐流動性アスファルト
舗装材は、前記表−１ホイールトラッキング試験結果に
よっても明らかなように、初期耐流動性が高く、従来の
流動防止用吸油材を用いたアスファルト舗装に比較し、
ワダチ掘れの少ない、しかも動的安定度の高い舗装路面
を維持することができる。The fluidity-resistant asphalt pavement material containing the coal ash sand according to the present invention has high initial fluidity resistance, asphalt using a conventional fluid-preventing oil-absorbing material, as is clear from the results of Table 1 wheel tracking test. Compared to pavement,
It is possible to maintain a pavement road surface with little digging and high dynamic stability.
特に初期わだち掘れの少ないことは、舗装路面そのもの
の耐久性が大きいことを意味するものである。In particular, less initial rutting means that the paved road surface itself has greater durability.
さらに本発明によるアスファルト舗装材は、その耐流動
性機能を発揮させる原材料として火力発電所等より産業
廃棄物として排出される石炭灰に、セメントおよび水又
は増粘剤の少量を加えて高速造粒していわゆる石炭灰砂
としたものを有効利用したもので、生産コストが安く、
従来の耐誘導性吸油材等を使用した場合に比較し、耐流
動性アスファルト舗装材としてのコスト軽減が可能であ
る。Furthermore, the asphalt pavement material according to the present invention is a high-speed granulation by adding a small amount of cement and water or a thickener to coal ash discharged from a thermal power plant or the like as industrial waste as a raw material for exerting its fluid resistance function. The so-called coal ash sand is effectively used, and the production cost is low,
It is possible to reduce the cost as a fluidity-resistant asphalt pavement material as compared with the case of using a conventional induction-resistant oil absorption material or the like.
すなわち従来の耐流動性改質アスコンや耐流動性吸油材
等に比較し、きわめて経済性の高いアスファルト舗装の
舗設ができる。That is, asphalt pavement with extremely high economic efficiency can be provided as compared with conventional fluidity-resistant modified ascon or fluidity-resistant oil-absorbent material.
しかも前記表−３で示したように、石炭灰砂の粒度範囲
を0.074〜1.2mmと比較的広い範囲に設定し、アスファル
ト混合物における粗粒骨材間に均質に分散できるように
したので動的安定性の高い舗装体が得られる。さらに従
来の流動防止用吸油材を使用した場合と比較し、その添
加量による施工性への影響が少なく、前記動的安定性と
あいまって施工性に支障のない舗装体を構成し、今後ま
すます増大する自動車交通量に対応して、ワダチ掘れの
少ない、しかも動的安定度の高いアスファルト舗装体と
しての効用を発揮することができる。Moreover, as shown in Table 3 above, the particle size range of the coal ash sand was set to a relatively wide range of 0.074 to 1.2 mm, and it was possible to disperse it uniformly between the coarse-grained aggregates in the asphalt mixture. A stable pavement can be obtained. Furthermore, compared with the case of using the conventional oil absorption material for flow prevention, the amount of addition will have less effect on the workability, and together with the above-mentioned dynamic stability, a pavement will be constructed that will not hinder the workability. Corresponding to an ever-increasing traffic volume of automobiles, it is possible to exert its effect as an asphalt pavement with a small amount of wasting and a high dynamic stability.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山本 忠 宮城県仙台市中山７丁目２番１号 東北電 力株式会社 電力技術研究所内 (72)発明者 高安 述史 宮城県仙台市御町東５丁目１番36号 大成 道路株式会社 東北支社技術試験所内 (72)発明者 山田 美孝 宮城県仙台市御町東５丁目１番36号 大成 道路株式会社 東北支社技術試験所内 (56)参考文献 特開 昭61−172918（ＪＰ，Ａ) 特開 昭56−131662（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Yamamoto 7-2-1, Nakayama, Sendai City, Miyagi Prefecture Tohoku Electric Power Co., Inc. Electric Power Technology Laboratory (72) Inventor Takashi Yasushi 5th Mimachi Higashi, Sendai City, Miyagi Prefecture 1-36 Taisei Road Co., Ltd. Tohoku Branch Technical Laboratory (72) Inventor Yoshitaka Yamada 5-36 Mimachi Higashi, Sendai City, Miyagi Prefecture Taisei Road Co., Ltd. Tohoku Branch Technical Testing Station (56) Reference JP 61 -172918 (JP, A) JP-A-56-131662 (JP, A)
Claims (2)
灰砂を添加混練してなる耐流動性アスファルト舗装材で
あって、 前記石炭灰砂は、石炭灰100重量部に対して、セメント
を10重量部以上20重量部以下と適量の水又は小量の増粘
剤もしくは水および増粘剤の双方を加え、粒径が0.074
〜1.2mm程度の粒を70％以上含む粒状材であって、これ
を養生硬化し、さらに乾燥処理したものであることを特
徴とする石炭灰砂を添加した耐流動性アスファルト舗装
材。1. A fluidity-resistant asphalt pavement material obtained by adding and kneading coal ash sand to a heat-kneaded asphalt mixture, wherein the coal ash sand is 10 parts by weight of cement with respect to 100 parts by weight of coal ash. More than or equal to 20 parts by weight and an appropriate amount of water or a small amount of a thickener or both water and a thickener, and a particle size of 0.074
A fluid resistance asphalt pavement material containing coal ash sand, characterized in that it is a granular material containing 70% or more of particles of about 1.2 mm, which is cured and hardened and further dried.
の添加量は、アスファルト混合物100重量部に対して、
２〜10重量部であることを特徴とする請求項１記載の石
炭灰砂を添加した耐流動性アスファルト舗装材。2. The amount of coal ash sand added to the asphalt mixture is 100 parts by weight of the asphalt mixture,
The fluidity-resistant asphalt pavement material containing the coal ash sand according to claim 1, which is 2 to 10 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1046820A JPH0774484B2 (en) | 1989-02-28 | 1989-02-28 | Flow-resistant asphalt pavement material containing coal ash sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1046820A JPH0774484B2 (en) | 1989-02-28 | 1989-02-28 | Flow-resistant asphalt pavement material containing coal ash sand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02225704A JPH02225704A (en) | 1990-09-07 |
| JPH0774484B2 true JPH0774484B2 (en) | 1995-08-09 |
Family
ID=12757975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1046820A Expired - Fee Related JPH0774484B2 (en) | 1989-02-28 | 1989-02-28 | Flow-resistant asphalt pavement material containing coal ash sand |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0774484B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758005A (en) * | 2014-01-10 | 2014-04-30 | 大连理工大学 | Proportioning design method for iron tailing sand asphalt mixture |
| CN114940806B (en) * | 2022-05-18 | 2023-07-25 | 深圳市建交新材料科技有限公司 | Reactive asphalt repair material and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56131662A (en) * | 1980-03-19 | 1981-10-15 | Mitsubishi Heavy Ind Ltd | Filler for asphalt |
| JPS5722350A (en) * | 1980-07-15 | 1982-02-05 | Toshiba Corp | Circulatory device for cooling liquid |
| JPS61151052A (en) * | 1984-12-24 | 1986-07-09 | 東北電力株式会社 | Manufacture of coal ash sand |
| JPS61172918A (en) * | 1985-01-25 | 1986-08-04 | Sumitomo Kensetsu Kk | Curing method for coal ash solidified board |
| JPH0620040B2 (en) * | 1985-07-18 | 1994-03-16 | 日本電気株式会社 | Method for manufacturing semiconductor device |
-
1989
- 1989-02-28 JP JP1046820A patent/JPH0774484B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02225704A (en) | 1990-09-07 |
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