JPH10273661A - Solidifying material having low alkali content and its production - Google Patents
Solidifying material having low alkali content and its productionInfo
- Publication number
- JPH10273661A JPH10273661A JP9483297A JP9483297A JPH10273661A JP H10273661 A JPH10273661 A JP H10273661A JP 9483297 A JP9483297 A JP 9483297A JP 9483297 A JP9483297 A JP 9483297A JP H10273661 A JPH10273661 A JP H10273661A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- concrete
- slag
- raw
- low alkali
- 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
- 239000000463 material Substances 0.000 title claims abstract description 57
- 239000003513 alkali Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000000843 powder Substances 0.000 claims abstract description 60
- 239000002893 slag Substances 0.000 claims abstract description 29
- 239000010802 sludge Substances 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000007711 solidification Methods 0.000 claims description 16
- 230000008023 solidification Effects 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 9
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 8
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 8
- 235000005822 corn Nutrition 0.000 claims description 8
- 241000209149 Zea Species 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 239000002699 waste material Substances 0.000 abstract description 8
- 238000006703 hydration reaction Methods 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 239000000470 constituent Substances 0.000 abstract description 3
- 230000036571 hydration Effects 0.000 abstract description 3
- 238000004090 dissolution Methods 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 13
- 239000000203 mixture Substances 0.000 description 7
- 240000008042 Zea mays Species 0.000 description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 239000002440 industrial waste Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- -1 for example Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Landscapes
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、産業廃泥やヘドロ
等の固化処理、或いは高含水地盤や軟弱地盤の安定化や
強化に用いる固化材およびその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solidified material used for solidifying industrial waste mud or sludge, or for stabilizing or strengthening a highly watery or soft ground, and a method for producing the same.
【０００２】[0002]
【従来技術とその問題点】産業廃泥やヘドロ等の高含水
物の処理に際し、或いは軟弱地盤の改良に際し、固化材
を用いて固化することが行われている。このような固化
材としては、比較的安価であり、処理作業が極めて容易
であり、固化後の強度発現性が優れていることなどか
ら、水硬性物質であるセメントや石灰が用いられてき
た。しかし、セメントや石灰は水和反応により水酸化カ
ルシウムを生成し、この高アルカリ性の水酸化カルシウ
ムが水硬後の固化物から溶出し、周囲の環境を汚染する
ことも懸念されている。2. Description of the Related Art In the treatment of industrial waste mud, sludge, and other highly hydrated substances, or in the improvement of soft ground, solidification is performed using a solidifying material. As such a solidifying material, cement and lime, which are hydraulic substances, have been used because they are relatively inexpensive, extremely easy to process, and have excellent strength development after solidification. However, cement and lime generate calcium hydroxide by a hydration reaction, and there is a concern that the highly alkaline calcium hydroxide elutes from the solidified product after hydraulic hardening and contaminates the surrounding environment.
【０００３】一方、コンクリート構造物を解体したコン
クリート塊は、多くは埋め立て地等へ廃棄されるもの
の、一部は破砕、磨砕などの処理を経て再生路盤材、又
は再生骨材として再利用されている。このような処理に
よって多量のコンクリート粉が発生するが、該コンクリ
ート粉は特に利用されることなく廃棄されている。ま
た、生コンプラント等で生産された生コンの残渣である
生コンスラッジもこれと云って有効な活用策もなく、コ
ンクリート塊と同様に一般には埋め立て地等へ廃棄され
ている。[0003] On the other hand, concrete masses obtained by dismantling concrete structures are mostly discarded to landfills or the like, but some of them are re-used as recycled roadbed materials or recycled aggregates through crushing, grinding and other treatments. ing. Although a large amount of concrete powder is generated by such treatment, the concrete powder is discarded without being particularly used. Also, ready-mixed sludge, which is a residue of ready-mixed concrete produced in a ready-mixed plant or the like, has no effective utilization measures, and is generally discarded to a landfill like a concrete lump.
【０００４】このようなコンクリート粉、生コンスラッ
ジの活用策として、セメント等の水硬性物質に加えて固
化材として利用することも検討されてきたが、コンクリ
ート粉や生コンスラッジ粉は、カルシウムシリケート水
和物やカルシウムアルミネート水和物等のセメント水和
生成物を多量に含み、全体としては僅かな水硬性しか示
さない。このため、そのままセメント等に加えても単な
る増量材としての作用しか示さず、それ故大量使用には
向かず、有望な活用策となるには至っていない。[0004] As a means of utilizing such concrete powder and raw con sludge, it has been studied to use it as a solidifying material in addition to a hydraulic substance such as cement. And a large amount of cement hydration products such as calcium aluminate hydrate and show only a small hydraulicity as a whole. For this reason, even if it is added to cement or the like as it is, it only shows a function as a mere filler, and therefore is not suitable for mass use and has not been a promising utilization measure.
【０００５】[0005]
【発明が解決しようとする課題】この発明は、従来廃棄
処分されていた粉状のコンクリート廃材や生コンスラッ
ジの有効活用策として、コンクリート粉や生コンスラッ
ジ粉を主原料とし、高アルカリ成分の溶出を殆ど起こさ
ず優れた固化機能を有する低アルカリ固化材並びにその
製造方法を提供するものである。SUMMARY OF THE INVENTION The present invention relates to a method for effectively utilizing powdered concrete waste material and raw concrete sludge which have been conventionally disposed of, using concrete powder or raw concrete sludge powder as a main raw material, and eluting high alkali components. An object of the present invention is to provide a low-alkali solidifying material which hardly occurs and has an excellent solidifying function, and a method for producing the same.
【０００６】[0006]
【課題を解決するための手段】前記課題解決に鑑み、本
発明者らは鋭意検討した結果、セメント水和物からなる
コンクリート粉や生コンスラッジ粉を加熱し、構成成分
中に含まれる結晶水や水酸基を除去すると、低アルカリ
性の水硬性物質を主成分とする脱水物になり、固化材と
して十分適したものになることを見出した。Means for Solving the Problems In view of the above-mentioned problems, the present inventors have conducted intensive studies and as a result, heated concrete powder or raw consludge powder composed of cement hydrate to remove water of crystallization contained in the constituents. It has been found that when the hydroxyl group is removed, a dehydrated product containing a low alkali hydraulic substance as a main component is obtained, which is sufficiently suitable as a solidifying material.
【０００７】即ち、本発明は以下に記した低アルカリ固
化材（１〜２）、及びその製造方法（３〜５）である。 （１） コンクリート粉又は／及び生コンスラッジ粉を
加熱してなる脱水物を主体とする低アルカリ固化材。 （２） スラグを含み、且つスラグとコンクリート粉又
は／及び生コンスラッジ粉の加熱脱水物との含有重量比
が、スラグ１に対し、コンクリート粉又は／及び生コン
スラッジ粉の加熱脱水物が１．５〜９である前記（１）
の低アルカリ固化材。 （３） コンクリート粉又は／及び生コンスラッジ粉を
４００〜８００℃で加熱し、脱水せしめることを特徴と
する低アルカリ固化材の製造方法。 （４） コンクリート粉又は／及び生コンスラッジ粉を
４００〜８００℃で加熱し、脱水せしめ、これに、スラ
グ１に対しコンクリート粉又は／及び生コンスラッジ粉
の加熱脱水物が１．５〜９の含有重量比になるようスラ
グを加えることを特徴とする前記（３）の低アルカリ固
化材の製造方法。 （５） 加熱が６００〜８００℃である前記（３）又は
（４）の低アルカリ固化材の製造方法。That is, the present invention relates to a low alkali solidifying material (1-2) described below and a method for producing the same (3-5). (1) A low alkali solidified material mainly composed of a dehydrated material obtained by heating concrete powder and / or raw corn sludge powder. (2) The content weight ratio of the slag to the slag and the concrete dehydrated and / or the raw dehydrated condensed sludge powder is 1.5 when the weight of the dehydrated concrete and / or raw decontaminated sludge powder is 1.5 per slag. (1) that is
Low alkali solidification material. (3) A method for producing a low alkali solidified material, characterized in that concrete powder and / or raw corn sludge powder are heated at 400 to 800 ° C. and dehydrated. (4) The concrete powder and / or raw consludge powder is heated at 400 to 800 ° C. and dewatered, and the content of the slag 1 containing 1.5 to 9 of the thermally dehydrated concrete powder and / or raw consludge powder per slag 1 The method for producing a low alkali solidified material according to the above (3), wherein slag is added so as to have a weight ratio. (5) The method for producing a low alkali solidification material according to (3) or (4), wherein the heating is performed at 600 to 800 ° C.
【０００８】[0008]
【発明の実施の形態】本発明の低アルカリ固化材は、コ
ンクリート粉及び／又は生コンスラッジ粉を加熱してコ
ンクリート粉及や生コンスラッジ粉構成成分から水分子
が気化離脱した脱水物を主体とするものであって、該脱
水物は、付着水を始め、結晶水や水酸基を殆ど或いは全
く含まない成分のみからなるものである。BEST MODE FOR CARRYING OUT THE INVENTION The low alkali solidification material of the present invention is mainly composed of dehydrated material obtained by heating concrete powder and / or raw consludge powder to evaporate and desorb water molecules from the concrete powder and constituent components of the raw consludge powder. The dehydrated product is composed of only components containing little or no water of crystallization and hydroxyl groups, such as attached water.
【０００９】また、本発明の低アルカリ固化材は、前記
廃コンクリート粉及び／又は生コンスラッジ粉を加熱し
てなる脱水物に、好ましくはスラグが加わったものであ
る。スラグとしては、例えば高炉スラグなどの鉄鋼スラ
グが望ましいが、他のスラグであっても良い。スラグの
低アルカリ固化材中の含有量は、スラグ１に対し、コン
クリート粉又は／及び生コンスラッジ粉の加熱物が１．
５〜９の重量比であるのが好ましい。尚、スラグの含有
割合がこれ以上多いものは、固化材としての吸水性が低
下するので好ましくない。[0009] The low alkali solidification material of the present invention is obtained by heating a waste concrete powder and / or a raw con- sludge powder, and preferably adding slag to the dewatered product. As the slag, for example, steel slag such as blast furnace slag is preferable, but other slag may be used. The content of the slag in the low alkali solidification material was as follows: 1 slag, 1 heated material of concrete powder and / or raw consludge powder.
Preferably the weight ratio is between 5 and 9. A slag content higher than this is not preferred because the water absorption as a solidifying material is reduced.
【００１０】また、本発明の低アルカリ固化材は、例え
ば強度調整などの目的に応じてセメントなどの他の水硬
性材料及び／または石炭灰などのセメント用に使用され
ている公知の混和材を含むことができる。この場合、水
硬性材料や混和材の固化材中の含有量は３０重量％未満
とする。また、前記スラグ及び他の水硬性材料や混和材
を含む場合の低アルカリ固化材中の廃コンクリート粉及
び／又は生コンスラッジ粉を加熱した脱水物の含有量は
少なくとも６０重量％であれば良い。[0010] The low alkali solidifying material of the present invention may be, for example, other known hydraulic materials such as cement and / or known admixtures used for cement such as coal ash, depending on the purpose of adjusting the strength. Can be included. In this case, the content of the hydraulic material or the admixture in the solidified material is less than 30% by weight. In addition, the content of the dehydrated product obtained by heating the waste concrete powder and / or the raw consludge powder in the low alkali solidification material when the slag and other hydraulic materials or admixtures are contained may be at least 60% by weight.
【００１１】以下、本発明による低アルカリ固化材の製
造方法を記す。原料として例えば粉状のコンクート廃材
などのコンクリート粉、必要に応じ予め乾燥、解砕され
た生コンスラッジ粉の何れか１種または任意の配合割合
の両者の混合物を用い、これを４００〜８００℃、より
好ましくは６００〜８００℃で加熱することにより脱水
せしめ、結晶水や水酸基を殆ど或いは全く含まない成分
のみからなる脱水物を得る。尚、加熱装置は特に限定さ
れないが、加熱時の雰囲気調整等は必要なく、大気中で
加熱できる。また加熱温度４００℃未満では水分子の離
脱が不十分となり吸水性や水硬性が低下するので好まし
くなく、８００℃を越えると生石灰生成量が増加するた
め強度発現性の低下とアルカリ成分溶出量の増大が起こ
り易いので好ましくない。Hereinafter, a method for producing a low alkali solidified material according to the present invention will be described. As a raw material, for example, concrete powder such as powdery concrete waste material, and if necessary, a mixture of any one of the raw consludge powder or a mixture of any mixing ratio of raw crushed raw sludge powder, which is used at 400 to 800 ° C, More preferably, it is dehydrated by heating at 600 to 800 ° C. to obtain a dehydrated product consisting only of components containing little or no water of crystallization or hydroxyl groups. The heating device is not particularly limited, but it is not necessary to adjust the atmosphere during the heating, and the heating can be performed in the atmosphere. Further, if the heating temperature is less than 400 ° C., the release of water molecules is insufficient, and the water absorption and hydraulic property are unfavorably reduced. It is not preferable because the increase easily occurs.
【００１２】加熱後の脱水物をもって低アルカリ固化材
とすることもできるが、好ましくは、これに例えば高炉
スラグなどのスラグを添加し、任意の公知混合手法によ
り均一に混合した混合物をもって低アルカリ固化材とす
る。この場合、スラグ添加量は、低アルカリ固化材中の
コンクリート粉及び／又は生コンスラッジ粉の加熱脱水
物１．５〜９に対し、スラグ１の重量比となるようにす
る。Although the dehydrated product after heating can be used as a low alkali solidification material, preferably, a slag such as a blast furnace slag is added thereto, and the mixture is uniformly mixed by any known mixing method to obtain a low alkali solidification material. Material. In this case, the slag addition amount is set to be the weight ratio of the slag 1 to 1.5 to 9 of the thermally dehydrated product of the concrete powder and / or the raw corn sludge powder in the low alkali solidification material.
【００１３】また更に、本発明の低アルカリ固化材は、
前記脱水物に、例えば水和反応後の硬化体強度特性の調
整等の必要性に応じ、セメントや石膏等の水硬性材料及
び／または混和材を加えることもできる。また、前記の
如くスラグを加えたものに水硬性材料や混和材を添加混
合したものであっても良い。尚、混和材は例えば石炭灰
などセメントに用いられている公知の混和材であれば何
れのものでも良い。このような水硬性材料や混和材の添
加量は、低アルカリ固化材中での含有量が３０重量％未
満にする。Still further, the low alkali solidifying material of the present invention comprises:
For example, a hydraulic material such as cement or gypsum and / or an admixture may be added to the dehydrated product according to the necessity of adjusting the strength characteristics of the cured product after the hydration reaction. Further, a material obtained by adding and mixing a hydraulic material or an admixture to a material obtained by adding slag as described above may be used. The admixture may be any known admixture used for cement such as coal ash. The amount of such a hydraulic material or admixture added is less than 30% by weight in the low alkali solidification material.
【００１４】[0014]
【作用と効果】コンクリート粉や生コンスラッジ粉を加
熱して得た脱水物は、何れも概ね原構造から水和物・水
酸基が抜けた構造となるので構造的には安定性を欠く
が、それ故非常に活性であって、高い吸水性を有し、水
和により水硬性を発現することができる。また、セメン
ト鉱物や水酸化カルシウム：Ｃａ（ＯＨ）2の含有量が
極めて少ないので固化材自体から溶出するアルカリ成分
の量も少なく、且つ一般のセメント系固化材よりも溶出
成分のｐＨも低いため、優れた低アルカリ固化材とな
る。また、該脱水物にスラグ等を加えた混合物は、水和
反応後の硬化体強度を向上させることができる。[Function and effect] The dehydrated material obtained by heating concrete powder or raw corn sludge powder has a structure in which hydrates and hydroxyl groups are almost removed from the original structure, and thus lacks structural stability. Therefore, it is very active, has high water absorption, and can exhibit hydraulic properties by hydration. Also, since the content of cement mineral and calcium hydroxide: Ca (OH) 2 is extremely small, the amount of alkali component eluted from the solidified material itself is small, and the pH of the eluted component is lower than that of general cement-based solidified material. , An excellent low alkali solidifying material. In addition, a mixture obtained by adding slag or the like to the dehydrated product can improve the strength of the cured product after the hydration reaction.
【００１５】かかる本発明の低アルカリ固化材は、コン
クリート廃材の再利用処理過程で発生するコンクリート
粉や生コンスラッジ粉と云った廃材を原料として大量に
使用することができるため原料コストが比較的安価であ
り、また極めて容易に製造することができるため、コン
クリート廃材や生コンスラッジの有効活用策として著し
く優れたものである。また、本発明の低アルカリ固化材
は、高い吸水性を有するため特に高含水率の汚泥や地盤
の固化に適したものである。The low alkali solidified material of the present invention can be used in a large amount as a raw material such as concrete powder or raw consludge powder generated in the process of recycling concrete waste material, so that the raw material cost is relatively low. In addition, since it can be produced very easily, it is a remarkably excellent measure for effectively utilizing concrete waste material and raw concrete sludge. Further, the low alkali solidification material of the present invention has high water absorption, and is particularly suitable for solidification of sludge or ground having a high water content.
【００１６】[0016]
【実施例】以下、本発明を実施例によって具体的に説明
する。併せて、本発明の範囲外である比較例も参考の為
記す。表１に表す化学成分と平均粒径の各原料を用い、
このうちコンクリート粉と生コンスラッジ粉を電気炉に
て３００〜９５０℃の各温度でそれぞれ約３０分間加熱
した。尚、化学成分は、セメント協会標準試験方法ＪＣ
ＡＳ Ｉ−１２による方法で調べた。The present invention will be specifically described below with reference to examples. In addition, comparative examples outside the scope of the present invention are also described for reference. Using each of the raw materials having the chemical components and the average particle diameter shown in Table 1,
Among these, concrete powder and raw corn sludge powder were heated in an electric furnace at 300 to 950 ° C. for about 30 minutes. The chemical components are based on the JC standard test method JC
Investigation was performed by the method according to AS I-12.
【００１７】[0017]
【表１】 [Table 1]
【００１８】４００℃で加熱後のコンクリート粉及び生
コンスラッジ粉の化学成分をそれぞれ表２に記す。Table 2 shows the chemical components of the concrete powder and the raw concrete sludge powder after heating at 400 ° C.
【００１９】[0019]
【表２】 [Table 2]
【００２０】各温度で加熱したコンクリート粉と生コン
スラッジ粉、高炉スラグ、早強セメントをそれぞれ予め
目開き４．７５ｍｍの篩を通して粗大粒を除去した後、
表３に記す配合割合（重量％）になるよう配合し、ハン
ドミキサーを用いて約１分間混合し、混合物を作製し
た。尚、表３にはコンクリート粉と生コンスラッジ粉の
加熱温度も併せて記す。The concrete powder, the raw corn sludge powder, the blast furnace slag, and the early-strength cement heated at each temperature were previously passed through a 4.75 mm sieve to remove coarse particles.
The mixture was blended so as to have the blending ratio (% by weight) shown in Table 3 and mixed for about 1 minute using a hand mixer to prepare a mixture. Table 3 also shows the heating temperature of the concrete powder and the raw sludge powder.
【００２１】[0021]
【表３】 [Table 3]
【００２２】次いで、固化対象物として日本土質工学会
規定の試験法によって測定した表４で表される各特性を
有し、ＳＯ3（約１８．３％）、ＣａＯ（約１２．９
％）、Ｆｅ2Ｏ3（約１１．５％）、ＭｇＯ（約１１．４
％）、ＴｉＯ2（約９．３％）、Ｈ2０（約３４．３％）
を主な化学成分とする産業廃泥（チタン廃泥）を、目開
き４．７５ｍｍの篩を通した後、この産業廃泥９１８グ
ラムに対し前記各混合物８２グラム添加したものを、ハ
ンドミキサーでそれぞれ約２分間混練した。Next, the solidification target has the characteristics shown in Table 4 measured by a test method specified by the Japan Society of Geotechnical Engineers, and includes SO 3 (about 18.3%) and CaO (about 12.9%).
%), Fe 2 O 3 (about 11.5%), MgO (about 11.4%).
%), TiO 2 (about 9.3%), H 2 O (about 34.3%)
After passing industrial waste mud (titanium waste mud) having as its main chemical component a 4.75 mm mesh sieve, 918 g of this industrial waste mud and 82 g of each of the above mixtures were added using a hand mixer. Each was kneaded for about 2 minutes.
【００２３】[0023]
【表４】 [Table 4]
【００２４】混練後直ちに、各混練物を内径５ｃｍ、高
さ１０ｃｍの円筒形型枠に振動充填し、温度２０℃、湿
度８０％の恒温室で約２４時間大気中で養生することに
よって供試体を作製した。各供試体は、材令７日後にそ
れぞれ日本土質工学会ＪＳＦ−Ｔ５１１に準拠した試験
方法で一軸圧縮強度を測定した。また、一部の供試体に
ついては溶出物のｐＨ値の測定を日本土質工学会ＪＳＦ
−Ｔ２１１に準拠した試験法により行った。各測定結果
は表３に併せて記す。Immediately after the kneading, each kneaded material was vibrated into a cylindrical mold having an inner diameter of 5 cm and a height of 10 cm, and cured in the air in a constant temperature room at a temperature of 20 ° C. and a humidity of 80% for about 24 hours. Was prepared. Each specimen was measured for uniaxial compressive strength by a test method based on JSF-T511 after 7 days of material age. For some specimens, the pH value of the eluate was measured by the Japan Society of Geotechnical Engineers, JSF
-Performed by a test method based on T211. Each measurement result is also shown in Table 3.
Claims (5)
ジ粉を加熱してなる脱水物を主体とする低アルカリ固化
材。1. A low alkali solidified material mainly composed of a dehydrated substance obtained by heating concrete powder and / or raw corn sludge powder.
ト粉又は／及び生コンスラッジ粉の加熱脱水物との含有
重量比が、スラグ１に対し、コンクリート粉又は／及び
生コンスラッジ粉の加熱脱水物が１．５〜９である請求
項１記載の低アルカリ固化材。2. The content weight ratio of the slag to the slag and the concrete powder or / and the raw dehydrated condensed sludge powder is such that the ratio of the heated dehydrated concrete powder and / or the raw decondensed sludge powder to slag 1 is 1 2. The low alkali solidification material according to claim 1, wherein the amount is from 0.5 to 9.
ジ粉を４００〜８００℃で加熱し、脱水せしめることを
特徴とする低アルカリ固化材の製造方法。3. A method for producing a low alkali solidified material, comprising heating concrete concrete and / or raw corn sludge powder at 400 to 800 ° C. to dehydrate.
ジ粉を４００〜８００℃で加熱し、脱水せしめ、これ
に、スラグ１に対しコンクリート粉又は／及び生コンス
ラッジ粉の加熱脱水物が１．５〜９の含有重量比になる
ようスラグを加えることを特徴とする請求項３記載の低
アルカリ固化材の製造方法。4. The concrete powder and / or raw consludge powder is heated at 400 to 800 ° C. and dewatered. 4. The method for producing a low alkali solidified material according to claim 3, wherein slag is added so as to have a content ratio by weight of slag.
又は４の記載の低アルカリ固化材の製造方法。5. The method according to claim 3, wherein the heating is performed at 600 to 800 ° C.
Or the method for producing a low alkali solidified material according to item 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9483297A JPH10273661A (en) | 1997-03-28 | 1997-03-28 | Solidifying material having low alkali content and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9483297A JPH10273661A (en) | 1997-03-28 | 1997-03-28 | Solidifying material having low alkali content and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10273661A true JPH10273661A (en) | 1998-10-13 |
Family
ID=14121029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9483297A Pending JPH10273661A (en) | 1997-03-28 | 1997-03-28 | Solidifying material having low alkali content and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10273661A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005320442A (en) * | 2004-05-10 | 2005-11-17 | Shimizu Corp | Ground improvement solidified material using waste concrete fine powder and manufacturing method thereof |
| KR100834407B1 (en) * | 2007-06-11 | 2008-06-09 | (주) 대동종합건설 | Manufacturing method of solidifying agent composition using waste concrete sludge |
| JP2012012284A (en) * | 2010-06-01 | 2012-01-19 | Ohbayashi Corp | Method for producing hydraulic material, and method for selecting crushed concrete material |
| CN113060955A (en) * | 2021-03-22 | 2021-07-02 | 鱼迪 | Method for preparing artificial volcanic ash by using sludge and construction waste |
-
1997
- 1997-03-28 JP JP9483297A patent/JPH10273661A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005320442A (en) * | 2004-05-10 | 2005-11-17 | Shimizu Corp | Ground improvement solidified material using waste concrete fine powder and manufacturing method thereof |
| KR100834407B1 (en) * | 2007-06-11 | 2008-06-09 | (주) 대동종합건설 | Manufacturing method of solidifying agent composition using waste concrete sludge |
| JP2012012284A (en) * | 2010-06-01 | 2012-01-19 | Ohbayashi Corp | Method for producing hydraulic material, and method for selecting crushed concrete material |
| CN113060955A (en) * | 2021-03-22 | 2021-07-02 | 鱼迪 | Method for preparing artificial volcanic ash by using sludge and construction waste |
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