JPS61178453A - Freeze-proofed lightweight aggregate - Google Patents
Freeze-proofed lightweight aggregateInfo
- Publication number
- JPS61178453A JPS61178453A JP1926585A JP1926585A JPS61178453A JP S61178453 A JPS61178453 A JP S61178453A JP 1926585 A JP1926585 A JP 1926585A JP 1926585 A JP1926585 A JP 1926585A JP S61178453 A JPS61178453 A JP S61178453A
- Authority
- JP
- Japan
- Prior art keywords
- lightweight aggregate
- aggregate
- liquid
- antifreeze
- freeze
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 18
- 230000002528 anti-freeze Effects 0.000 claims description 17
- 238000007710 freezing Methods 0.000 claims description 17
- 230000008014 freezing Effects 0.000 claims description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 235000019441 ethanol Nutrition 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 description 9
- 239000011148 porous material Substances 0.000 description 5
- 238000005086 pumping Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 108010053481 Antifreeze Proteins Proteins 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明はコンクリート用の軽量骨材に関し、特に骨材
中に外部からの水の侵入を防止し、且つ、凍結による骨
材およびコンクリートの劣化を防止するように凍結防止
処理を施した軽量骨、材に関する。Detailed Description of the Invention (Field of Industrial Application) This invention relates to a lightweight aggregate for concrete, and in particular, to prevent water from entering the aggregate from the outside and prevent deterioration of the aggregate and concrete due to freezing. Concerning lightweight bones and lumber that have been treated with antifreeze treatment to prevent
（従来技術と問題点）
周知のように、骨材は全く水を含まない状態から、粒表
面の濡れた状態まで、種々の含水状態がある。その含水
弁はコンクリートのワーカビリチ。(Prior Art and Problems) As is well known, aggregates have various water-containing states, ranging from no water at all to a state where the surface of the aggregates is wet. The water-containing valve is concrete workability.
強度の管理にあたって常に考慮しなければならない。特
に軽量骨材は多孔質で内部空隙が多いことから、その吸
水状態には十分注意する必要がある。This must always be taken into account when controlling strength. In particular, lightweight aggregate is porous and has many internal voids, so it is necessary to pay close attention to its water absorption state.
コンクリートの混線、運搬、打設の過程において、軽量
骨材に多くの水分が吸収されてしまうと、コンクリート
のフンシスチンシーが低下して、ワーカビリチが著しく
損われる。If a large amount of water is absorbed into the lightweight aggregate during the process of mixing, transporting, and placing concrete, the concrete's stability will decrease and workability will be significantly impaired.
また、軽量骨材に吸収された水分は、骨材の空隙が細か
（且つ入組んでいることもあって容易に放出されず、寒
冷時に骨材中の水分が凍結膨張し、骨材に引張力を与え
、その結果コンクリート全体に引張応力が働く。In addition, the moisture absorbed by lightweight aggregates is not easily released because the pores in the aggregates are small (and intricate), and when it is cold, the moisture in the aggregates freezes and expands, causing the aggregates to become tensile. force is applied, resulting in tensile stress acting on the entire concrete.
コンクリートは元来引張強度は著しく低く、上述した骨
材の凍結膨張の影響によって、ひび割れが生じたり、極
端な場合には原形を止めない程破壊されることもある。Concrete originally has extremely low tensile strength, and under the influence of freezing and expansion of the aggregate mentioned above, it may crack or, in extreme cases, be destroyed to the extent that it cannot retain its original shape.
一方、近時コンクリートの打設作業には、ポンプ圧送が
一般に行なわれているが、圧送時に加わる圧力で軽量骨
材の吸水が促進される現象が見られ、このため上述した
問題が助長される傾向にある。On the other hand, pumping is generally used for concrete placement work these days, but the pressure applied during pumping tends to promote water absorption in lightweight aggregates, which exacerbates the above-mentioned problems. There is a tendency.
そこで、従来、上述した軽量骨材の吸水現象を防ぐため
に、精製過程で十分に吸水された骨材を用いるか、混線
前に吸水させるという対策が施されていた。Conventionally, in order to prevent the above-mentioned water absorption phenomenon of lightweight aggregates, measures have been taken to use aggregates that have sufficiently absorbed water during the refining process, or to absorb water before mixing.
しかし、この対策では吸水現象を防止することはできて
も、凍結防止にはならず、凍結によるコンクリートのひ
び割れ、破壊が防止できなかった。However, although this measure could prevent water absorption, it did not prevent freezing, and it did not prevent concrete from cracking or breaking due to freezing.
この発明は上述した従来の問題点に鑑みてなされたもの
であって、その目的とするところは、混線前にコンクリ
ートの性質に影響を与えない不凍性あるいは難凍性の液
体を骨材の空隙内に含浸させることにより、混線後の運
搬・打設に伴う吸水によるワーカビリチ、ボンバビリチ
の低下を防止し、なお且つ低温下における凍結融解耐久
性を確保できるようした軽量骨材を提供することにある
。This invention was made in view of the above-mentioned conventional problems, and its purpose is to add an antifreeze or antifreeze liquid that does not affect the properties of concrete to the aggregate before mixing. To provide a lightweight aggregate that prevents decreases in workability and bombability due to water absorption during transportation and placement after cross-contact by impregnating the voids, and also ensures freeze-thaw durability at low temperatures. be.
（問題点を解決するための手段）
上記目的を達成するために、こめ発明は、多孔質であっ
て内部に空隙を有する軽量骨材の該空隙内に凝固点を下
げた不凍性または難凍性の液体を含浸させたことを特徴
とする。(Means for Solving the Problems) In order to achieve the above object, the Kome invention provides an antifreeze or antifreeze material with a lower freezing point in the voids of a lightweight aggregate that is porous and has voids inside. It is characterized by being impregnated with a sexual liquid.
（作 用）
軽量骨材の空隙内に不凍性または難凍性の液体が含浸さ
れているため、セメント等と混練された際に吸水が促進
されることがなく、また、ポンプ圧送の際に加圧されて
も、それ以上に吸水することが防止される。(Function) Since the voids of the lightweight aggregate are impregnated with antifreeze or antifreeze liquid, water absorption is not promoted when mixed with cement, etc., and when pumped Even if it is pressurized to a certain level, it is prevented from absorbing any more water.
さらに、軽量骨材の空隙内に含浸された液体は、不凍性
または難凍性であって、寒冷時においても凍結すること
がない。Furthermore, the liquid impregnated into the voids of the lightweight aggregate is non-freezing or resistant to freezing, and does not freeze even in cold weather.
（実 施 例）
以下、この発明の好適な実施例について添附図面に基づ
いて詳細に説明する。(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings.
第１図は、この発明に係る凍結防止処理を施した軽量骨
材の断面を示しており、この発明に適用される軽量骨材
自体は、従来から知られた一般的な天然または人工骨材
が用いられる。FIG. 1 shows a cross section of a lightweight aggregate that has been subjected to anti-freezing treatment according to the present invention, and the lightweight aggregate itself applied to this invention is a conventionally known general natural or artificial aggregate. is used.
図において、１０は骨材であり、これには多数の気泡１
２や毛細孔１４が入組んで存在し、これらの気泡１２と
毛細孔１４は空隙１６を構成している。In the figure, 10 is aggregate, which contains many air bubbles 1.
2 and capillary pores 14 are present in an intricate manner, and these air bubbles 12 and capillary pores 14 constitute voids 16.
この多孔質な軽量骨材１０の空隙１６には、凝固点を下
げた不凍性または難凍性の液体１８が含浸させられてい
る。The voids 16 of this porous lightweight aggregate 10 are impregnated with an antifreeze or refractory liquid 18 whose freezing point is lowered.
液体１８は、骨材１０の表面に形成された凹部だけでな
く、これらに連通した毛細孔１４内にも侵入している。The liquid 18 enters not only the recesses formed on the surface of the aggregate 10 but also the capillary pores 14 communicating with these recesses.
この不凍性または難凍性の液体１８の含浸により、外部
から水分が多孔質な骨材１０中に侵入せず、骨材１０が
これ以上吸水することを阻止している。This impregnation with the antifreeze or antifreeze liquid 18 prevents moisture from entering the porous aggregate 10 from the outside and prevents the aggregate 10 from absorbing any more water.
上記液体１８は、骨材１０の気泡１２と毛細孔１４の合
計体積である全空隙の５０％以上を占めるように充満す
ることが、吸水を阻止する上で好ましい。In order to prevent water absorption, it is preferable that the liquid 18 fills 50% or more of the total voids, which is the total volume of the air bubbles 12 and capillary pores 14 in the aggregate 10.
また、液体１８は不凍性または難凍性であって、セメン
トなどと混練した際にコンクリートの性質に影響を及ぼ
さないものが望ましく、このような材料としては、エチ
レングリコール、エチルアルコール、メチルアルコール
などを所定の割合で水に溶解したものが適切で、あって
、これらの薬剤を水に加えると凝固点が下がり、不凍性
または難凍性が付与される。In addition, it is desirable that the liquid 18 is non-freezing or non-freezing, and does not affect the properties of concrete when mixed with cement etc. Such materials include ethylene glycol, ethyl alcohol, methyl alcohol, etc. It is appropriate to dissolve these chemicals in water at a predetermined ratio, and when these chemicals are added to water, the freezing point is lowered and antifreeze or freeze-resistant properties are imparted.
例えば、エチレングリコールを５０％の濃度で溶解する
と凍結温度は約−３０度となる。For example, when ethylene glycol is dissolved at a concentration of 50%, the freezing temperature is approximately -30 degrees.
軽量骨材１０に上記液体を含浸させる処理方法としては
、骨材の製造過程において、キルン出口に設けた液体槽
内に、高温の軽量骨材１０を投入するとか、または、軽
量骨材１０を減圧雰囲気中に置いた後、大気圧下の液体
１８中に含浸させるなどによって、比較的簡単に処理で
きる。The treatment method for impregnating the lightweight aggregate 10 with the above-mentioned liquid includes charging the lightweight aggregate 10 at a high temperature into a liquid tank provided at the kiln outlet during the aggregate manufacturing process, or It can be processed relatively easily by placing it in a reduced pressure atmosphere and then impregnating it in the liquid 18 under atmospheric pressure.
さて、以上のように凍結防止処理を施した軽量骨材にお
いては、骨材１０の空隙１６内に不凍性または難凍性の
液体１８が含浸させれているため、混線、運搬時にそれ
以上吸水が促進されることがなく、コンクリートのコン
シスチンシーが低下してワーカビリチが損われることが
ない。Now, in the lightweight aggregate that has been subjected to anti-freezing treatment as described above, the voids 16 of the aggregate 10 are impregnated with the anti-freeze or anti-freeze liquid 18, which may cause cross-contact or excessive damage during transportation. Water absorption is not promoted, the consistency of concrete is not reduced, and workability is not impaired.
また、ポンプ圧送時にあっても同様に吸水することが防
止され、ボンバビリチも適切に維持される。Furthermore, even during pumping, water absorption is similarly prevented, and bombability is maintained appropriately.
さらに、液体１８は不凍性または難凍性であって、寒冷
時においても凍結することがないため、凍結に伴う体積
膨張による引張応力が発生せず、コンクリートのひび割
れや破壊を効果的且つ確実に防止できる。Furthermore, the liquid 18 is non-freezing or freeze-resistant and does not freeze even in cold weather, so no tensile stress is generated due to volumetric expansion due to freezing, effectively and reliably preventing cracking and destruction of concrete. can be prevented.
（発明の効果）
以上、実施例で詳細に説明したように、この発明に係る
軽量骨材によれば、これが混練されたコンクリートをポ
ンプ圧送に適した性質に維持できるとともに、耐凍結融
解性能も満足できるなど優れた効果が得られる。(Effects of the Invention) As described above in detail in the examples, the lightweight aggregate according to the present invention can maintain mixed concrete with properties suitable for pumping, and also has freeze-thaw resistance. Excellent effects such as satisfaction can be obtained.
第１図はこの発明の一実施例による軽量骨材の断面図で
ある。
１０・・・・・・・・・軽量骨材
１２・・・・・・・・・気 泡
１４・・・・・・・・・毛細孔FIG. 1 is a sectional view of a lightweight aggregate according to an embodiment of the present invention. 10・・・・・・Lightweight aggregate 12・・・・・・Air bubbles 14・・・・・・Capillary
Claims (3)
空隙内に凝固点を下げた不凍性または難凍性の液体を含
浸させたことを特徴とする凍結防止処理を施した軽量骨
材。(1) A lightweight aggregate that is porous and has voids inside, and the voids are impregnated with an antifreeze or antifreeze liquid that has a lowered freezing point. aggregate.
充満されていることを特徴とする特許請求の範囲第１項
記載の凍結防止処理を施した軽量骨材。(2) The lightweight aggregate subjected to antifreeze treatment according to claim 1, wherein the liquid fills 50% or more of the total voids of the lightweight aggregate.
ル、メチルアルコールなどのいずれか１つを所定の割合
で水に溶解したものからなることを特徴とする特許請求
の範囲第１項または第２項記載の凍結防止処理を施した
軽量骨材。(3) The liquid described in claim 1 or 2 is characterized in that the liquid is composed of one of ethylene glycol, ethyl alcohol, methyl alcohol, etc. dissolved in water at a predetermined ratio. Lightweight aggregate with antifreeze treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1926585A JPS61178453A (en) | 1985-02-05 | 1985-02-05 | Freeze-proofed lightweight aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1926585A JPS61178453A (en) | 1985-02-05 | 1985-02-05 | Freeze-proofed lightweight aggregate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61178453A true JPS61178453A (en) | 1986-08-11 |
Family
ID=11994605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1926585A Pending JPS61178453A (en) | 1985-02-05 | 1985-02-05 | Freeze-proofed lightweight aggregate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61178453A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6418951A (en) * | 1987-07-11 | 1989-01-23 | Shimizu Construction Co Ltd | Light-weight aggregate concrete |
| JP2006265028A (en) * | 2005-03-23 | 2006-10-05 | Ube Ind Ltd | Dust suppressing type perlite |
| CN112098454A (en) * | 2020-09-21 | 2020-12-18 | 哈尔滨工业大学 | Asphalt mixture freezing point determination method based on volume expansion |
-
1985
- 1985-02-05 JP JP1926585A patent/JPS61178453A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6418951A (en) * | 1987-07-11 | 1989-01-23 | Shimizu Construction Co Ltd | Light-weight aggregate concrete |
| JP2006265028A (en) * | 2005-03-23 | 2006-10-05 | Ube Ind Ltd | Dust suppressing type perlite |
| JP4696625B2 (en) * | 2005-03-23 | 2011-06-08 | 宇部興産株式会社 | Dust control perlite |
| CN112098454A (en) * | 2020-09-21 | 2020-12-18 | 哈尔滨工业大学 | Asphalt mixture freezing point determination method based on volume expansion |
| CN112098454B (en) * | 2020-09-21 | 2022-05-10 | 哈尔滨工业大学 | Asphalt mixture freezing point determination method based on volume expansion |
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