JP2838409B2 - Method for producing aggregate of concrete building - Google Patents
Method for producing aggregate of concrete buildingInfo
- Publication number
- JP2838409B2 JP2838409B2 JP2355889A JP2355889A JP2838409B2 JP 2838409 B2 JP2838409 B2 JP 2838409B2 JP 2355889 A JP2355889 A JP 2355889A JP 2355889 A JP2355889 A JP 2355889A JP 2838409 B2 JP2838409 B2 JP 2838409B2
- Authority
- JP
- Japan
- Prior art keywords
- aggregate
- asphalt
- recovered
- concrete
- producing
- 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
- 239000004567 concrete Substances 0.000 title description 17
- 238000004519 manufacturing process Methods 0.000 title description 13
- 239000010426 asphalt Substances 0.000 claims description 33
- 239000004576 sand Substances 0.000 claims description 11
- 239000004575 stone Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 239000002699 waste material Substances 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- -1 calcium silicate hydrates Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、コンクリート建造物の骨材の製造方法に関
する。Description: TECHNICAL FIELD The present invention relates to a method for producing an aggregate of a concrete building.
ビルディングや橋桁などのコンクリート建造物に用い
られるコンクリートは、砂、砂利、砕石などの骨材をセ
メントペーストにより結合したものであって、必要に応
じてAE剤、急結剤、防水剤などや混和剤が混合されてい
る。そして、このようなコンクリートは鉄筋により補強
されている。Concrete used for concrete structures such as buildings and bridge girders is a mixture of aggregates such as sand, gravel, crushed stone, etc., with cement paste.If necessary, AE agents, quick-setting agents, waterproofing agents, etc. The agent is mixed. And such concrete is reinforced by reinforcing steel.
しかし、コンクリートは、セメントペーストに含まれ
る苛性ソーダや消石灰などのアルカリ成分や水、骨材に
含まれる反応性シリカなどが所謂アルカリ骨材反応を起
こし、珪酸ソーダや珪酸カルシウムの水和物などを生成
し、コンクリートに亀裂や剥離、さらには脱落を生じる
ことがある。そこで、従来はコンクリートの打設に先立
って反応性シリカなどを分析していたが、その作業は煩
わしいばかりでなく骨材の確保が難しいという問題があ
った。However, in concrete, alkali components such as caustic soda and slaked lime contained in cement paste, water, and reactive silica contained in aggregates cause a so-called alkali-aggregate reaction, producing sodium silicate and calcium silicate hydrates. The concrete may crack, peel off, or fall off. Therefore, conventionally, reactive silica and the like were analyzed prior to placing concrete. However, the work was not only troublesome, but also it was difficult to secure aggregate.
一方、舗装道路を補修するときなどにはアスファルト
や骨材を含む廃材が多量に発生する。この廃材は埋め立
てやアスファルト混合物に少量ずつ混入して用いられる
こともあるが、一般的には使用量が少量であるため余剰
の廃材が大量に発生し、その処理に困難を極めていた。On the other hand, when repairing a pavement road, a large amount of waste including asphalt and aggregate is generated. This waste material is sometimes used in a landfill or asphalt mixture by mixing it little by little. However, in general, since the amount used is small, a large amount of excess waste material is generated, and it is extremely difficult to treat the waste material.
本発明は以上の事情ないし問題に鑑みてなされたもの
で、アルカリ骨材を反応を生じにくく、しかも上記廃材
の処理の一役を担うことが可能なコンクリート建造物の
骨材の製造方法を提供することを目的とする。The present invention has been made in view of the above circumstances and problems, and provides a method for producing aggregates of concrete buildings, which does not easily react with alkali aggregates and can play a role in treating the waste materials. The purpose is to:
本発明によるコンクリート建造物の骨材の製造方法
は、既設のアスファルト舗装部を切削することにより砕
石などの骨材主体にアスファルトが付着した回収骨材を
生産する工程と、この工程で得られた回収骨材に新たに
砂利や砂などの骨材を熱を加えて混合することにより新
たに加えた上記骨材を上記回収骨材の余剰アスファルト
で被覆する工程と、を含むものである。The method for producing an aggregate of a concrete building according to the present invention includes a step of producing a recovered aggregate in which asphalt is adhered to an aggregate mainly composed of crushed stones by cutting an existing asphalt pavement portion, and this step. Covering the newly added aggregate with surplus asphalt of the collected aggregate by newly adding aggregate such as gravel or sand to the collected aggregate by applying heat and mixing.
本発明によると、舗装道路を補修するときなどに生じ
る大量の廃材が骨材として有効再利用される。しかも、
この発明によって得られた骨材は、もともとアスファル
トで被覆されている回収骨材と、その回収骨材に新たに
加えられて回収骨材の余剰アスファルトで被覆された砂
利や砂などの骨材との混合物であるので、それらの骨材
を被覆しているアスファルトが保護層として作用し、骨
材中の反応性成分とセメントのアルカリ成分および水と
の反応、すなわちアルカリ骨材反応が阻止される。さら
に、新たに加えた骨材として海砂などを用いたときで
も、その海砂に付着している塩分がその海砂を被覆して
いるアスファルトで閉じ込められるため、骨材による塩
害対策にもなる。また、海風や融雪剤などの外部から浸
入するアルカリ性イオンなどのアルカリ骨材反応に対し
ても十分な効果を発揮する。すなわち、塩害によるアル
カリ骨材反応を防止する作用がある。According to the present invention, a large amount of waste material generated when repairing a pavement road is effectively reused as aggregate. Moreover,
The aggregate obtained according to the present invention includes recovered aggregate originally covered with asphalt, and aggregate such as gravel or sand newly added to the recovered aggregate and coated with excess asphalt of the recovered aggregate. , The asphalt covering those aggregates acts as a protective layer, and the reaction between the reactive component in the aggregate and the alkali component and water of the cement, that is, the alkali-aggregate reaction is prevented. . Furthermore, even when sea sand is used as newly added aggregate, salt attached to the sea sand is trapped by the asphalt that covers the sea sand, which is a countermeasure against salt damage caused by the aggregate. . In addition, it exerts a sufficient effect on alkali-aggregate reactions such as alkaline ions entering from outside such as sea breeze and snow melting agents. That is, it has an effect of preventing an alkali-aggregate reaction due to salt damage.
第１図と第２図は本発明の製造方法に用いられる回収
骨材Ａを示す説明図である。同図のように回収骨材Ａで
は、砂利、砕石、砂などの骨材主体１にアスファルト２
がもともと付着している。回収骨材Ａとしては第１図お
よび第２図のように骨材主体１の全体がアスファルト２
により被覆されているものに限らず、骨材主体１の一部
がアスファルト２により被覆されているものも含まれ
る。このような回収骨材Ａには既設のアスファルト舗装
部を掻きほぐすことにより得られる廃材をそのまま利用
することができるため、この回収骨材Ａは容易に生産す
ることができる。FIG. 1 and FIG. 2 are explanatory views showing a recovered aggregate A used in the production method of the present invention. As shown in the figure, in the recovered aggregate A, asphalt 2
Is originally attached. As the recovered aggregate A, as shown in FIG. 1 and FIG.
Not only those coated with asphalt 2 but also those in which part of the aggregate main body 1 is coated with asphalt 2 are included. The waste aggregate obtained by scraping the existing asphalt pavement can be used as such as the recovered aggregate A, so that the recovered aggregate A can be easily produced.
上記回収骨材Ａは、第３図に示した回収骨材生産工程
を経ることによって得られる。この回収骨材生産工程
は、舗装道路などの既設のアスファルト舗装部を切削す
ることにより砕石などの骨材主体１にアスファルト２が
付着した回収骨材Ａを生産する工程である。切削には掻
きほぐしや、塊状物を得た後にそれを加熱してほぐすこ
となどが含まれる。前者は現場での回収骨材Ａの生産に
適し、後者は塊状物を工場のプラントに集めて回収骨材
Ａを生産するのに適する。この工程で生産される回収骨
材Ａには第１図および第２図のように骨材主体１の全体
がアスファルト２により被覆されているものに限らず、
骨材主体１の一部がアスファルト２により被覆されてい
るものも含まれる。The recovered aggregate A is obtained through the recovered aggregate production process shown in FIG. This recovered aggregate production process is a process of cutting the existing asphalt pavement such as a pavement road to produce recovered aggregate A in which asphalt 2 adheres to the aggregate main body 1 such as crushed stone. Cutting includes scraping and heating and loosening after obtaining a lump. The former is suitable for the production of recovered aggregate A on site, and the latter is suitable for collecting aggregates in a factory plant to produce the recovered aggregate A. The recovered aggregate A produced in this step is not limited to the one in which the entirety of the aggregate main body 1 is covered with the asphalt 2 as shown in FIG. 1 and FIG.
An aggregate in which a part of the aggregate main body 1 is covered with the asphalt 2 is also included.
上記回収骨材生産工程で得られた回収骨材Ａに新たに
砂利、砕石、砂などの公知の骨材を混合することによっ
て骨材混合工程が行われる。この工程では、熱を加えて
混合する。そのため、余剰アスファルトは新しい骨材の
被覆に使われる。アスファルト混合工程は、回収骨材生
産工程で得られた骨材Ａと新たに混合された骨材とアス
ファルトとを混練し、新たに混合した骨材や、回収骨材
生産工程でできた一部被覆骨材の不足分にアスファルト
を付着させてその骨材をアスファルトで完全に被覆する
工程である。したがって、一般には全工程に加熱工程が
併用される。An aggregate mixing step is performed by newly mixing known aggregates such as gravel, crushed stone, and sand with the recovered aggregate A obtained in the above-described recovered aggregate production step. In this step, heat is applied to mix. The surplus asphalt is therefore used for coating new aggregate. The asphalt mixing process is a process in which the aggregate A obtained in the recovered aggregate production process, the newly mixed aggregate and asphalt are kneaded, and the newly mixed aggregate and a portion formed in the recovered aggregate production process are mixed. In this step, asphalt is adhered to the shortage of the coated aggregate, and the aggregate is completely covered with asphalt. Therefore, a heating step is generally used in all steps.
上記のようにして得られた骨材をセメントペーストと
混練してコンクリートを打設した場合、回収骨材１を被
覆しているアスファルトや、新たに加えられた砂利、砂
などの骨材を被覆しているアスファルト２が、アルカリ
骨材反応を阻止する保護層として機能するため、打設し
たコンクリートがアルカリ骨材反応により亀裂や剥離、
脱落を起こすことはない。また、舗装道路を補修すると
きなどに発生する廃材を回収骨材Ａとして利用すること
により廃材の有効再利用が可能になる。When the concrete obtained by kneading the aggregate obtained as described above with the cement paste is cast, the aggregate such as asphalt covering the recovered aggregate 1 and newly added gravel and sand is coated. Since the asphalt 2 that has been functioning as a protective layer that prevents the alkali-aggregate reaction, the cast concrete may crack or peel due to the alkali-aggregate reaction.
It does not fall out. Further, by using the waste material generated when the pavement road is repaired as the recovered aggregate A, the waste material can be effectively reused.
本発明によるコンクリート建造物の骨材の製造方法
は、既設のアスファルト舗装部を切削することにより砕
石などの骨材主体にアスファルトが付着した回収骨材を
生産する工程と、この工程で得られた回収骨材に新たに
砂利や砂などの骨材を熱を加えて混合することにより新
たに加えた上記骨材をアスファルトで被覆する工程と、
を含むため、舗装道路を補修するときなどに生じる大量
の廃材を回収骨材として有効再利用することができ、廃
材処理の一役を担わせることが可能になる。また、この
方法により製造される骨材は、もともとアスファルトで
被覆されている回収骨材と、新たに加えられた後にアス
ファルトで被覆された砂利や砂などの骨材との混合物で
あるので、アルカリ骨材反応を起こさず、コンクリート
に亀裂を生じたり、コンクリートに剥離や脱落を生じる
ことがなくなる。そのため、その骨材を用いたコンクリ
ートは打設に先立つ反応性シリカの分析などの煩わしい
作業を省略するとともに骨材の確保を容易にすることが
できる。The method for producing an aggregate of a concrete building according to the present invention includes a step of producing a recovered aggregate in which asphalt is adhered to an aggregate mainly composed of crushed stones by cutting an existing asphalt pavement portion, and this step. A step of coating the newly added aggregate with asphalt by adding heat and mixing aggregates such as gravel and sand to the recovered aggregate,
Therefore, a large amount of waste material generated when repairing a pavement road can be effectively reused as recovered aggregate, and can play a role in waste material treatment. In addition, the aggregate produced by this method is a mixture of recovered aggregate originally covered with asphalt and aggregate such as gravel and sand that is newly added and then coated with asphalt. It does not cause an aggregate reaction and does not cause cracks in the concrete or peeling or falling off of the concrete. Therefore, in the concrete using the aggregate, troublesome work such as analysis of the reactive silica prior to casting is omitted and the aggregate can be easily secured.
第１図と第２図は回収骨材を示す説明図、第３図は本発
明のコンクリート建造物の骨材の製造方法の実施例を示
す工程図である。 Ａ……回収骨材、１……骨材主体、２……アスファル
ト。1 and 2 are explanatory views showing the recovered aggregate, and FIG. 3 is a process chart showing an embodiment of the method for producing an aggregate of a concrete building according to the present invention. A: Collected aggregate, 1 ... Aggregate main body, 2 ... Asphalt.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C04B 18/16 C04B 20/10──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) C04B 18/16 C04B 20/10
Claims (1)
により砕石などの骨材主体にアスファルトが付着した回
収骨材を生産する工程と、この工程で得られた回収骨材
に新たに砂利や砂などの骨材を熱を加えて混合すること
により新たに加えた上記骨材を上記回収骨材の余剰アス
ファルトで被覆する工程と、を含むコンクリート建造物
の骨材の製造方法。(1) a step of producing a recovered aggregate in which asphalt is mainly adhered to an aggregate such as crushed stone by cutting an existing asphalt pavement, and newly adding gravel or sand to the recovered aggregate obtained in this step; Covering the newly added aggregate with excess asphalt of the recovered aggregate by heating and mixing the aggregates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2355889A JP2838409B2 (en) | 1989-01-31 | 1989-01-31 | Method for producing aggregate of concrete building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2355889A JP2838409B2 (en) | 1989-01-31 | 1989-01-31 | Method for producing aggregate of concrete building |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02204352A JPH02204352A (en) | 1990-08-14 |
| JP2838409B2 true JP2838409B2 (en) | 1998-12-16 |
Family
ID=12113842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2355889A Expired - Fee Related JP2838409B2 (en) | 1989-01-31 | 1989-01-31 | Method for producing aggregate of concrete building |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2838409B2 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52127922A (en) * | 1976-04-20 | 1977-10-27 | Kyowa Giken | Process and apparatus for regeneration of precoated aggregate |
| JPS5310628A (en) * | 1976-07-19 | 1978-01-31 | Yasuo Edo | Method of waterproofing by using asphalt concrete waste |
| JPS58110463A (en) * | 1981-12-24 | 1983-07-01 | 大成道路株式会社 | Composite concrete |
| JPS59117641A (en) * | 1982-12-24 | 1984-07-07 | Hitachi Ltd | Stack length designating system |
| JP2509567B2 (en) * | 1986-06-09 | 1996-06-19 | 株式会社東芝 | Organic thin film multicolor display element |
| JPS6369738A (en) * | 1986-09-12 | 1988-03-29 | 清水建設株式会社 | Surface-treated crushed rock aggregate |
-
1989
- 1989-01-31 JP JP2355889A patent/JP2838409B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02204352A (en) | 1990-08-14 |
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