JP2010006636A - Binder for steelmaking slags - Google Patents
Binder for steelmaking slags Download PDFInfo
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- JP2010006636A JP2010006636A JP2008167471A JP2008167471A JP2010006636A JP 2010006636 A JP2010006636 A JP 2010006636A JP 2008167471 A JP2008167471 A JP 2008167471A JP 2008167471 A JP2008167471 A JP 2008167471A JP 2010006636 A JP2010006636 A JP 2010006636A
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Abstract
Description
本発明は、製鋼スラグ用バインダーに関するものである。 The present invention relates to a binder for steelmaking slag.
製鋼スラグとは、製鋼工程で生成するスラグである。粗鋼1tあたり110kg程度の製鋼スラグが生成するといわれている。これは、従来からアスファルトやコンクリートの骨材として使用されているものである。 Steelmaking slag is slag generated in the steelmaking process. It is said that about 110 kg of steelmaking slag is produced per ton of crude steel. This is conventionally used as an aggregate of asphalt or concrete.
バインダーとは、骨材を固着する接着剤のようなものであり、樹脂モルタルの樹脂、アスファルト混合物のアスファルト等をいう。
製鋼スラグは、通常の天然石骨材と比較して多孔質で凹凸があるため、アスファルトがスラグ表面に十分に被覆されないという性質がある。また、製鋼スラグは天然骨材に含まれるSiO2、Al2O3の他に天然石骨材よりCaO成分が非常に多く、表面電位が−と+(酸性と塩基性)の両性であるため、酸性に効果のあるアミン系界面活性剤では水による剥離を防止できない。
The binder is an adhesive that fixes the aggregate, and refers to resin mortar resin, asphalt mixture asphalt, and the like.
Steelmaking slag has a property that asphalt is not sufficiently covered on the slag surface because it is more porous and uneven than ordinary natural stone aggregate. Steelmaking slag has much more CaO component than natural stone aggregate in addition to SiO 2 and Al 2 O 3 contained in natural aggregate, and the surface potential is-and + (acid and basic) amphoteric, Amine-based surfactants effective for acidity cannot prevent peeling due to water.
そこで、より被覆しやすく、耐水性の高い被覆を形成するバインダー、多孔質でキメの凹凸の多いスラグ表面に浸透しやすく、均一で厚い被覆を形成することができるバインダーが求められていた。 Accordingly, there has been a demand for a binder that forms a coating that is easier to coat and has a high water resistance, and that can easily penetrate into a porous slag surface with many textured irregularities and can form a uniform and thick coating.
以上のような現状に鑑み、本発明者は鋭意研究の結果本発明製鋼スラグ用バインダーを完成したものであり、その特徴とするところは、ストレートアスファルト100重量部に対して、改質用ポリマーを5〜15重量部、石油系炭化水素を1〜5重量部、更に界面活性剤を0.1〜0.5重量部混合したものである点にある。 In view of the present situation as described above, the present inventor has completed the steelmaking slag binder of the present invention as a result of intensive studies. The feature of the present invention is that the modifying polymer is added to 100 parts by weight of straight asphalt. 5 to 15 parts by weight, 1 to 5 parts by weight of petroleum-based hydrocarbons, and 0.1 to 0.5 parts by weight of a surfactant are mixed.
ストレートアスファルトとは、原油の減圧蒸留でえられたそのままのものをいう。 Straight asphalt is the raw material obtained by distillation under reduced pressure of crude oil.
改質用ポリマーとは、SBS(スチレン・ブタジエンブロック共重合体)、SBR(スチレン・ブタジエン共重合体)、SIS(スチレン・イソプレン共重合体)等であり、その重合度や分子量は通常アスファルトの改質用に使用されている程度のものでよい。なかでも、SBSが好適であった。
この改質ポリマーの混合量は、ストレートアスファルト100重量部に対して、5〜15重量部である。5以下では効果がなく15以上では粘度が高くなりすぎるためである。
Examples of the modifying polymer include SBS (styrene / butadiene block copolymer), SBR (styrene / butadiene copolymer), SIS (styrene / isoprene copolymer), and the degree of polymerization and molecular weight thereof are usually those of asphalt. The thing of the grade currently used for modification | reformation may be sufficient. Of these, SBS was preferred.
The mixing amount of the modified polymer is 5 to 15 parts by weight with respect to 100 parts by weight of straight asphalt. This is because if 5 or less, there is no effect and if 15 or more, the viscosity becomes too high.
石油系炭化水素とは、常温で液体又は半固体で、引火点が200℃以上の炭化水素であり、パラフィン系とナフテン系、アロマ系がある。なかでもパラフィン系またはナフテン系の260℃以上の引火点のものが好ましい。
本発明はこの炭化水素を混合することがポイントであり、従来のバインダーにはないものである。これを加える目的は、改質アスファルトの常温付近の粘弾性性質を損ねることなく、改質アスファルトの高温時の粘性を適度に下げることができるためである。また、ポーラス混合物の耐久性や強度を低下させることなく、多孔質表面に浸透しやすく均一な厚い皮膜を形成できる。
Petroleum hydrocarbons are hydrocarbons that are liquid or semi-solid at room temperature and have a flash point of 200 ° C. or higher, and include paraffinic, naphthenic, and aromatic. Of these, paraffinic or naphthenic flash points of 260 ° C. or higher are preferable.
The point of the present invention is to mix this hydrocarbon, which is not found in conventional binders. The purpose of adding this is because the viscosity of the modified asphalt at a high temperature can be lowered appropriately without impairing the viscoelastic properties of the modified asphalt near room temperature. In addition, a uniform thick film that can easily penetrate the porous surface can be formed without reducing the durability and strength of the porous mixture.
この石油系炭化水素の混合量は1〜5重量部である。1重量部以下では、ほとんど効果がなく、5重量部以上では粘度が下がりすぎる。 The mixing amount of the petroleum hydrocarbon is 1 to 5 parts by weight. If it is 1 part by weight or less, there is almost no effect, and if it is 5 parts by weight or more, the viscosity is too low.
ここでいう界面活性剤は、両性界面活性剤か、又はカチオン性界面活性剤とアニオン性界面活性剤との混合物かである。両性界面活性剤は、分子内にプラスイオンとマイナスイオンの両方を有するものである。例えば、アミノ酸の塩が代表的なものである。 The surfactant here is an amphoteric surfactant or a mixture of a cationic surfactant and an anionic surfactant. Amphoteric surfactants have both positive and negative ions in the molecule. For example, amino acid salts are typical.
また、両性界面活性剤に代えて、カチオン性界面活性剤とアニオン性界面活性剤との混合物でもよい。即ち、1分子内にはマイナスイオンかプラスイオンしかないが、混合物にすると同じように、両性が存在すると考えられるためである。よって、カチオン性界面活性剤とアニオン性界面活性剤とは同じモル数が望ましい。例えば、アミン系界面活性剤と、高級脂肪酸等である。 Further, instead of the amphoteric surfactant, a mixture of a cationic surfactant and an anionic surfactant may be used. That is, although there are only negative ions or positive ions in one molecule, it is considered that amphotericity exists in the same way as a mixture. Therefore, the same number of moles is desirable for the cationic surfactant and the anionic surfactant. For example, amine surfactants and higher fatty acids.
このような界面活性剤を使用するのは、スラグ表面のマイナスとプラスの両方に吸着でき、スラグに耐水性の高い被覆を形成できるためである。これにより剥離が大きく軽減できる。 The reason why such a surfactant is used is that it can be adsorbed on both the minus and plus sides of the slag surface and can form a highly water-resistant coating on the slag. Thereby, peeling can be greatly reduced.
この界面活性剤は0.1〜0.5重量部混合する。0.1以下では効果がなく、0.5以上は骨材表面に必要な量を超え過剰なため逆効果である。 This surfactant is mixed in an amount of 0.1 to 0.5 parts by weight. If it is 0.1 or less, there is no effect, and if it is 0.5 or more, it exceeds the amount necessary for the aggregate surface and is counterproductive.
次に本発明バインダーの製造方法について説明する。
ストレートアスファルトを180〜190℃に昇温し、ポリマーを投入し、十分に攪拌し均一に混合する。ポリマーが相溶し、熟成(養生)が完成する間際に炭化水素及び界面活性剤を混合し完成である。
Next, the manufacturing method of this invention binder is demonstrated.
The temperature of the straight asphalt is raised to 180 to 190 ° C., the polymer is charged, and the mixture is sufficiently stirred and uniformly mixed. Hydrocarbon and surfactant are mixed just before the polymer is compatible and ripening (curing) is completed.
本発明バインダーの物性について説明する。
本発明と舗装設計施工指針の値と比較する。括弧内が指針の値である。
軟化点(℃):91.0(80以上)
伸度(15℃、cm):75(50以上)
タフネス(25℃、N・m):21(20以上)
針入度(25℃、1/10mm):53(40以上)
薄膜加熱質量変化率(%):0.05(0.6以下)
薄膜加熱針入度残留率(%):77.4(65以上)
引火点(℃):338(260以上)
密度(15℃、g/cm3):1.031
The physical properties of the binder of the present invention will be described.
The present invention is compared with the values of the pavement design and construction guideline. The value in parentheses is the guideline value.
Softening point (° C): 91.0 (80 or more)
Elongation (15 ° C., cm): 75 (50 or more)
Toughness (25 ° C, N · m): 21 (20 or more)
Penetration (25 ° C., 1/10 mm): 53 (40 or more)
Thin film heating mass change rate (%): 0.05 (0.6 or less)
Thin film heating penetration residual rate (%): 77.4 (65 or more)
Flash point (° C): 338 (over 260)
Density (15 ° C., g / cm 3): 1.031
本発明バインダーは、製鋼スラグを骨材として混合するのであるが、その用途は、通常のアスファルト舗装路だけでなく、小粒径・高空隙のポーラスアスファルト混合物に最適である。また、高耐久性を要求される路線のポーラスアスファルト混合物にも好適である。 The binder of the present invention mixes steelmaking slag as an aggregate, and its use is optimal not only for ordinary asphalt pavement but also for small particle size / high void porous asphalt mixture. Moreover, it is suitable also for the porous asphalt mixture of the line | wire where high durability is requested | required.
本発明バインダーには、次のような大きな利点がある。
(1) 本発明バインダーを用いた製鋼スラグを骨材として用いたアスファルト混合物は高温時の耐流動性に優れている。
(2) 同混合物は、広い温度領域での骨材飛散抵抗性に優れている。
(3) 交通車両のねじれ抵抗性に優れている。
(4) 把握力、粘着力に優れている。
(5) 膜厚を確保するための必要な粘度を有する。
(6) 耐水性に優れている。
The binder of the present invention has the following great advantages.
(1) An asphalt mixture using steelmaking slag using the binder of the present invention as an aggregate is excellent in fluid resistance at high temperatures.
(2) The mixture is excellent in aggregate scattering resistance in a wide temperature range.
(3) Excellent torsional resistance of traffic vehicles.
(4) Excellent grip and adhesive strength.
(5) It has a viscosity necessary for ensuring the film thickness.
(6) Excellent water resistance.
以下好適な実施例に基づいて本発明をより詳細に説明する。 Hereinafter, the present invention will be described in more detail based on preferred examples.
実施例
次の成分を使用した。
ストレートアスファルト60/80:100重量部
SBS:6.5重量部
ステアリルベタイン:0.2重量部
パラフィン系炭化水素(引火点約260℃):2重量部
Examples The following ingredients were used.
Straight asphalt 60/80: 100 parts by weight SBS: 6.5 parts by weight Stearyl betaine: 0.2 parts by weight Paraffin hydrocarbon (flash point: about 260 ° C.): 2 parts by weight
ストレートアスファルトを190℃まで昇温し、SBSを投入し十分に攪拌し均一に混合する。ポリマーが相溶し、熟成(養生)が完成する間際にパラフィン系炭化水素及びステアリルベタインを混合した。 The temperature of the straight asphalt is raised to 190 ° C., SBS is added, and the mixture is sufficiently stirred and mixed uniformly. The paraffinic hydrocarbon and stearyl betaine were mixed just before the polymer was compatible and aging (curing) was completed.
このバインダーを製鋼スラグを骨材として混合してポーラスアスファルト混合物を作成した。この性状を以下に示す。
骨材サイズ:10mmトップ
空隙率: 23〜25%
動的安定度(回/mm):7000程度
標準カンタブロ損失率:14.3%(試験条件:20℃養生、20℃試験)
水浸カンタブロ損失率:17.6%(水浸条件:60℃、48hr)
水浸カンタブロ増加率:123%(水浸カンタブロ損失率/標準カンタブロ損失率×100)
This binder was mixed with steelmaking slag as an aggregate to prepare a porous asphalt mixture. This property is shown below.
Aggregate size: 10mm top Porosity: 23-25%
Dynamic stability (times / mm): about 7000 Standard cantabulo loss rate: 14.3% (test conditions: 20 ° C. curing, 20 ° C. test)
Water immersion cantabulo loss rate: 17.6% (water immersion conditions: 60 ° C., 48 hours)
Immersion cantabulo increase rate: 123% (immersion cantabulo loss rate / standard cantabulo loss rate x 100)
動的安定度の通常の目標値は3000以上であり大きく越えている。また、標準カンタブロ損失率と水浸カンタブロ損失率のそれは20以下であり、これも十分クリアしている。
The usual target value of dynamic stability is 3000 or more and greatly exceeds. Further, the standard loss rate and the water immersion loss rate are 20 or less, which is also sufficiently clear.
Claims (1)
5 to 15 parts by weight of the modifying polymer, 1 to 5 parts by weight of petroleum-based hydrocarbons, and 0.1 to 0.5 of a surfactant are added to 100 parts by weight of straight asphalt. Characteristic steelmaking slag binder.
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JP2008167471A JP2010006636A (en) | 2008-06-26 | 2008-06-26 | Binder for steelmaking slags |
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JP2008167471A JP2010006636A (en) | 2008-06-26 | 2008-06-26 | Binder for steelmaking slags |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102776815A (en) * | 2012-07-16 | 2012-11-14 | 华南理工大学 | Porous bonding layer as well as construction method and application thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001130938A (en) * | 1999-09-14 | 2001-05-15 | Goodyear Tire & Rubber Co:The | Sbr used for modifying asphalt/cement |
JP2002538231A (en) * | 1997-08-29 | 2002-11-12 | シューマン・サソル・ゲーエムベーハー | Road surface production bitumen or asphalt, road surface, bitumen or asphalt manufacturing method |
WO2007034081A1 (en) * | 2005-09-22 | 2007-03-29 | Eurovia | Novel bitumen emulsion-based composition |
JP2007112657A (en) * | 2005-10-19 | 2007-05-10 | Sanyo Special Steel Co Ltd | Method of improving wear resistance of aggregate comprising steel making slag by granulation |
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2008
- 2008-06-26 JP JP2008167471A patent/JP2010006636A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002538231A (en) * | 1997-08-29 | 2002-11-12 | シューマン・サソル・ゲーエムベーハー | Road surface production bitumen or asphalt, road surface, bitumen or asphalt manufacturing method |
JP2001130938A (en) * | 1999-09-14 | 2001-05-15 | Goodyear Tire & Rubber Co:The | Sbr used for modifying asphalt/cement |
WO2007034081A1 (en) * | 2005-09-22 | 2007-03-29 | Eurovia | Novel bitumen emulsion-based composition |
JP2007112657A (en) * | 2005-10-19 | 2007-05-10 | Sanyo Special Steel Co Ltd | Method of improving wear resistance of aggregate comprising steel making slag by granulation |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102776815A (en) * | 2012-07-16 | 2012-11-14 | 华南理工大学 | Porous bonding layer as well as construction method and application thereof |
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