JP2001261416A - Hollow filler - Google Patents

Hollow filler

Info

Publication number
JP2001261416A
JP2001261416A JP2000079213A JP2000079213A JP2001261416A JP 2001261416 A JP2001261416 A JP 2001261416A JP 2000079213 A JP2000079213 A JP 2000079213A JP 2000079213 A JP2000079213 A JP 2000079213A JP 2001261416 A JP2001261416 A JP 2001261416A
Authority
JP
Japan
Prior art keywords
coal ash
cement
strength
weight
hollow filler
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
Application number
JP2000079213A
Other languages
Japanese (ja)
Inventor
Masaaki Noguchi
雅朗 野口
Keiji Omori
啓至 大森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiheiyo Cement Corp
Original Assignee
Taiheiyo Cement Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Taiheiyo Cement Corp filed Critical Taiheiyo Cement Corp
Priority to JP2000079213A priority Critical patent/JP2001261416A/en
Publication of JP2001261416A publication Critical patent/JP2001261416A/en
Pending legal-status Critical Current

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
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • 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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/34—Non-shrinking or non-cracking materials
    • 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

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain a hollow filler having excellent strength performance for a long tune, and small in the shrinkage after filling and solidifying even in the case of using an industrial by-product as a mixing material. SOLUTION: This hollow filler contains cement and coal ash containing 5-12 wt.% CaO. A hollow filler having the weight ratio of cement/coal ash of 2/98 to 30/70 is also included.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、地盤又は構造物中
の空洞を充填して、地盤や構造物の固定化・安定化を図
るための空洞充填材に関し、特に、長期において高い強
度発現性を有する空洞充填材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cavity filling material for filling a cavity in a ground or a structure to fix and stabilize the ground or a structure. The present invention relates to a cavity filler having:

【０００２】[0002]

【従来の技術】従来から、空洞充填材は、地盤、構造物
等の空洞部の充填補強を目的とする用途、例えば、上下
水管、ガス管等を土中に設置した後の管の固定や、廃坑
後の空洞の多い鉱山地盤を安定化させるため坑道等の充
填に用いられている。かかる空洞充填材に要求される強
度は、充填後の再掘削の要否により異なる。例えば、上
記の用途例のうち、前者の用途では、将来における管の
補修・交換等に備え、再掘削を容易とするため低強度が
要求され、後者の用途では、半永久的な空洞充填が必要
なため高強度が要求される等、用途に応じて空洞充填材
の強度発現性を調整する必要がある。2. Description of the Related Art Conventionally, hollow fillers have been used for the purpose of reinforcing the filling of cavities such as ground and structures, for example, for fixing pipes after installing water and sewer pipes, gas pipes and the like in the soil. It is used for filling tunnels and the like to stabilize mine ground with many cavities after abandoned mines. The strength required for such cavity fillers depends on whether re-digging is required after filling. For example, of the above application examples, the former application requires low strength to facilitate re-excavation in preparation for repair and replacement of pipes in the future, and the latter application requires semi-permanent cavity filling Therefore, for example, high strength is required, and it is necessary to adjust the strength developability of the cavity filler according to the application.

【０００３】しかし、主に経済性及び産業副産物の有効
活用等の要請により、従来から空洞充填材は、石炭灰や
スラグ等のポゾラン活性又は潜在水硬性を有する産業副
産物を安価な混合材として、セメントに多量に混合して
製造されているが、かかる混合材は、産業副産物であっ
て品質変動が大きいため、一般に、空洞充填材の強度を
低下させるとともに、強度の変動も大きく、用途に応じ
て強度発現性等の程度を調節することは困難であった。
もっとも、空洞充填材中のセメント混合量を増せば、強
度は向上するが、一方で、充填・固化後の収縮が大きく
なり、空洞充填材本来の目的を達成できない場合があっ
た。[0003] However, mainly due to the demand for economy and effective use of industrial by-products, conventionally, hollow fillers have been used as inexpensive admixtures of industrial by-products having pozzolanic activity or latent hydraulic properties such as coal ash and slag. Although it is manufactured by mixing it with cement in large quantities, such a mixed material is an industrial by-product and its quality varies greatly.Therefore, in general, the strength of the hollow filler material is reduced, and the strength varies greatly. Therefore, it was difficult to adjust the degree of strength development and the like.
However, if the cement mixing amount in the cavity filler is increased, the strength is improved, but on the other hand, the shrinkage after filling / solidification is increased, and the original purpose of the cavity filler may not be achieved.

【０００４】[0004]

【発明が解決しようとする課題】そこで、かかる事情に
鑑み、本発明は、産業副産物を混合材として使用して
も、長期の強度発現性に優れ、充填・固化後の収縮が少
ない空洞充填材を提供することを目的とする。Accordingly, in view of the above circumstances, the present invention provides a cavity filler which is excellent in long-term strength development and has little shrinkage after filling / solidification even when an industrial by-product is used as a mixture. The purpose is to provide.

【０００５】[0005]

【課題を解決するための手段】本発明者らは、上記課題
を解決すべく鋭意研究した結果、従来から空洞充填材の
混合材に使用されている石炭灰の中でも、ＣａＯを５〜
１２重量含む石炭灰を使用すると、ＣａＯの含有量にほ
ぼ比例して長期強度が増大し、充填・固化後の収縮が少
ないことを見出し、本発明を完成した。Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, among coal ash conventionally used as a mixture of hollow fillers, CaO is reduced to 5 to 5.
It has been found that when coal ash containing 12% by weight is used, the long-term strength increases almost in proportion to the CaO content, and the shrinkage after filling and solidification is small, and the present invention has been completed.

【０００６】即ち、本発明は（１）セメントと、ＣａＯ
を５〜１２重量％含有する石炭灰を含んでなる空洞充填
材を提供する。また（２）セメント／石炭灰の重量比
が、２／９８〜３０／７０である（１）に記載の空洞充
填材をも提供する。That is, the present invention provides (1) cement and CaO
Is provided comprising 5 to 12% by weight of coal ash. (2) The hollow filler according to (1), wherein the weight ratio of cement / coal ash is 2/98 to 30/70.

【０００７】[0007]

【発明の実施の形態】以下、本発明について詳細に説明
する。本発明で用いるセメントは、特に制限されること
はなく、普通ポルトランドセメント、早強ポルトランド
セメント等のポルトランドセメントや高炉セメント、フ
ライアッシュセメント等の混合セメントを挙げることが
できる。早期強度発現性を必要とする用途には、早強ポ
ルトランドセメントを使用するのが好ましく、中長期強
度発現性を必要とする用途には、普通ポルトランドセメ
ントや混合セメントの使用が好ましい。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The cement used in the present invention is not particularly limited, and examples thereof include Portland cement such as ordinary Portland cement and early-strength Portland cement and mixed cement such as blast furnace cement and fly ash cement. For applications requiring early strength development, it is preferable to use early-strength Portland cement, and for applications requiring medium- to long-term strength development, use of ordinary Portland cement or mixed cement is preferred.

【０００８】本発明で用いる石炭灰は、微粉炭燃焼から
発生する石炭灰を使用する。ボイラーから直接落下する
ボトムアッシュ、節炭器に落下するシンダーアッシュ、
電気集塵器より採取されるフライアッシュ等があるが、
その種類は問わない。本発明で用いる石炭灰は、ＣａＯ
を５〜１２重量％含有する石炭灰である。ＣａＯの含有
量が５重量％未満では長期の強度発現性が低く、１２重
量％を超えても、強度発現性の更なる増加は見られな
い。また、１２重量％を超える石炭灰は殆ど副産しない
ため、入手困難である。石炭灰は、石炭火力発電所から
発生する灰が使用でき、微粉炭燃焼によって生成し、燃
焼ボイラの燃焼ガスから空気余熱器、若しくは節炭器等
を通過する際に落下採取された石炭灰、又は、電気集塵
機で採取された石炭灰、更には燃焼ボイラの炉底に落下
した石炭灰のいずれも使用できる。特に、空洞充填材の
高い流動性・充填性が要求される用途には、電気集塵器
で採取され、粒度が小さく球状の粒子の含有率が高い石
炭灰、又は粗い石炭灰を分級して得られた石炭灰微粉が
好適である。As the coal ash used in the present invention, coal ash generated from pulverized coal combustion is used. Bottom ash falling directly from the boiler, Cinder ash falling into the economizer,
There is fly ash etc. collected from the electric dust collector,
The type does not matter. The coal ash used in the present invention is CaO
Is 5 to 12% by weight of coal ash. If the CaO content is less than 5% by weight, the long-term strength development is low, and if it exceeds 12% by weight, no further increase in strength development is observed. Further, coal ash exceeding 12% by weight hardly produces by-products, so that it is difficult to obtain. As coal ash, ash generated from coal-fired power plants can be used, generated by pulverized coal combustion, coal ash dropped from the combustion gas of the combustion boiler when passing through an air preheater or a coal-saving device, Alternatively, any of coal ash collected by an electric dust collector and coal ash dropped on the furnace bottom of a combustion boiler can be used. In particular, in applications where high fluidity / fillability of the cavity filler is required, it is collected by an electrostatic precipitator and classified into coal ash with a small particle size and high content of spherical particles, or coarse coal ash. The resulting coal ash fines are preferred.

【０００９】本発明の空洞充填材に含まれるセメントと
石炭灰の混合割合は、セメント／石炭灰の重量比で、２
／９８〜３０／７０が好ましい。この重量比が２／９８
未満では、セメント量が低く、強度が十分でない場合が
ある。また、３０／７０を超えると、空洞充填材の硬化
体が収縮して充填が不十分になる場合がある。The mixing ratio of cement and coal ash contained in the cavity filler of the present invention is 2% by weight of cement / coal ash.
/ 98-30 / 70 is preferred. This weight ratio is 2/98
If it is less, the amount of cement is low and the strength may not be sufficient. If the ratio exceeds 30/70, the cured product of the cavity filler may shrink, resulting in insufficient filling.

【００１０】尚、本発明の空洞充填材は、スラグ、石灰
石微粉末、シリカフューム、石膏等の混和材を含んでも
よい。[0010] The cavity filler of the present invention may contain an admixture such as slag, limestone fine powder, silica fume, and gypsum.

【００１１】[0011]

【実施例】以下、実施例により、本発明を説明する。空洞充填材の調整 表１に示すＣａＯ含有量の石炭灰を用いて、表１のセメ
ント／石炭灰の重量比に従い、空洞充填材を調整した。
なお、石炭灰は碧南火力発電所産の石炭灰原粉を用い、
セメントは太平洋セメント社製の普通ポルトランドセメ
ントを用いた。The present invention will be described below with reference to examples. Adjustment of Cavity Filler Using coal ash having the CaO content shown in Table 1, the cavity filler was adjusted according to the weight ratio of cement / coal ash in Table 1.
In addition, coal ash uses coal ash raw powder from Hekinan Thermal Power Station,
As the cement, ordinary Portland cement manufactured by Taiheiyo Cement was used.

【００１２】試験方法 （１）一軸圧縮強さ 表１の空洞充填材１００重量部に対し、水４０重量部を
加え、ハンドミキサーで２分間混練してスラリーを調整
した。このスラリーを塩化ビニル製型枠に充填し、型枠
ごとビニール袋で封緘し、２０℃で３日間、湿空養生し
た後、脱型して直径５０ｍｍ、高さ１００ｍｍの試験体
を３本づつ作成した。次に、この試験体を、ビニール袋
に入れて、２０℃で３６２日間、湿空養生した後、ＪＧ
Ｓ０５１１に従い、材齢３６５日の試験体の一軸圧縮強
さを測定した。その測定結果を表１に示す。 （２）長さ変化率 長さ変化率は、ＪＩＳ Ａ １１２９−１９９３のモル
タル及びコンクリートの長さ変化試験方法に準じて行な
った。すなわち、両端に乳白ガラスを配置した型枠に、
上記の一軸圧縮強さの試験で調整したのと同じスラリー
を流し込み、1週間、型枠内で湿空養生して、縦４０ｍ
ｍ、横４０ｍｍ、高さ１６０ｍｍの試験体を３本づつ作
成した。次に、両端の乳白ガラスに線を刻み、温度２０
±１℃、湿度６０±５%の大気乾燥雰囲気で養生した。
所定期間養生した後、コンパレータを用いて、両端の刻
んだ線の間隔を顕微鏡で測定し、３本の平均を算出し
た。その測定結果を表１に示す。 Test Method (1) Uniaxial Compressive Strength To 100 parts by weight of the cavity filler shown in Table 1, 40 parts by weight of water was added and kneaded with a hand mixer for 2 minutes to prepare a slurry. This slurry was filled in a vinyl chloride mold, sealed with a plastic bag together with the mold, cured at 20 ° C. for 3 days under moist air, then removed from the mold, and three specimens each having a diameter of 50 mm and a height of 100 mm were prepared. Created. Next, the test specimen was placed in a plastic bag, cured at 20 ° C. for 362 days under moist air, and then subjected to JG
In accordance with S0511, the uniaxial compressive strength of a 365-day-old specimen was measured. Table 1 shows the measurement results. (2) Length change rate The length change rate was measured in accordance with the mortar and concrete length change test method of JIS A 1129-1993. In other words, on a mold with opalescent glass on both ends,
Pour the same slurry as adjusted in the above test of uniaxial compressive strength, cure for 1 week in a mold, and dry in a mold.
Three test specimens each having a length of 40 mm, a width of 40 mm, and a height of 160 mm were prepared. Next, a line was cut on the opal glass at both ends,
Cured in an air dry atmosphere at ± 1 ° C. and humidity 60 ± 5%.
After curing for a predetermined period, the interval between the cut lines at both ends was measured with a microscope using a comparator, and the average of the three lines was calculated. Table 1 shows the measurement results.

【００１３】[0013]

【表１】 [Table 1]

【００１４】表１から分かるように、セメント／石炭灰
の重量比を５／９５と一定にして比較すると、ＣａＯ含
有量が５〜１１．９重量％の石炭灰を含む空洞充填材
（実施例Ｂ、Ｅ、Ｈ、Ｉ）の一軸圧縮強さは４．８〜１
２．６ＭＰａであり、ＣａＯ含有量が０．９〜３．３重
量％の石炭灰を含む空洞充填材（比較例Ｊ〜Ｍ）の一軸
圧縮強さ１．３〜２．２ＭＰａと比べ、格段に高くなっ
ている。また、１２重量％を超えても（比較例Ｐ）、実
施例Ｉと比べ、強度の更なる増加は見られない。また、
セメント／石炭灰の重量比が２／９８〜３０／７０であ
る空洞充填材（実施例Ａ、Ｂ、Ｄ、Ｅ〜Ｉ、比較例Ｊ〜
Ｍ、Ｐ）の収縮率は、７．２×１０-4〜９．９×１０-4
と小さいのに対し、３０／７０を超えると（比較例Ｎ、
Ｏ）、収縮率は１２．６×１０-4、１３．４×１０-4と
大きくなる傾向になる。As can be seen from Table 1, when the weight ratio of cement / coal ash is kept constant at 5/95, a cavity filler containing coal ash having a CaO content of 5 to 11.9% by weight (Example 1) B, E, H, I) uniaxial compressive strength is 4.8-1
It is 2.6 MPa, and the CaO content is 0.9 to 3.3% by weight. Is higher. Further, even when the content exceeds 12% by weight (Comparative Example P), no further increase in strength is observed as compared with Example I. Also,
Cavity filler having a cement / coal ash weight ratio of 2/98 to 30/70 (Examples A, B, D, E to I, Comparative Examples J to
M, P) has a shrinkage of 7.2 × 10 −4 to 9.9 × 10 −4.
Whereas, when it exceeds 30/70 (Comparative Example N,
O), the shrinkage tends to be as large as 12.6 × 10 −4 and 13.4 × 10 −4 .

【００１５】[0015]

【発明の効果】本発明の空洞充填材は、産業副産物を混
合材として使用しても、長期の強度発現性に優れ、充填
・固化後の収縮が少ない。また、少ないセメント混合量
でも、高い強度が得られるので、空洞充填材を安価に提
供できる。The hollow filler of the present invention is excellent in long-term strength development and has little shrinkage after filling and solidification even when industrial by-products are used as a mixture. In addition, since high strength can be obtained even with a small amount of cement, the cavity filler can be provided at low cost.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０４Ｂ 111:34 Ｃ０４Ｂ 111:34 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C04B 111: 34 C04B 111: 34

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 セメントと、ＣａＯを５〜１２重量％含
有する石炭灰を含んでなる空洞充填材。1. A hollow filler comprising cement and coal ash containing 5 to 12% by weight of CaO. 【請求項２】 セメント／石炭灰の重量比が、２／９８
〜３０／７０である請求項１に記載の空洞充填材。2. The weight ratio of cement / coal ash is 2/98.
The cavity filler according to claim 1, which has a size of ３０30/70.
JP2000079213A 2000-03-22 2000-03-22 Hollow filler Pending JP2001261416A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000079213A JP2001261416A (en) 2000-03-22 2000-03-22 Hollow filler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000079213A JP2001261416A (en) 2000-03-22 2000-03-22 Hollow filler

Publications (1)

Publication Number Publication Date
JP2001261416A true JP2001261416A (en) 2001-09-26

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ID=18596488

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000079213A Pending JP2001261416A (en) 2000-03-22 2000-03-22 Hollow filler

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Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002255619A (en) * 2001-02-27 2002-09-11 Taiheiyo Cement Corp Material for filling cavity
WO2004022504A1 (en) * 2002-08-02 2004-03-18 Charles Edgar Price Cementitious composition comprising bottom ash, methods of making and use thereof
US7716901B2 (en) 2004-05-27 2010-05-18 Price Charles E Packaging for particulate and granular materials

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002255619A (en) * 2001-02-27 2002-09-11 Taiheiyo Cement Corp Material for filling cavity
WO2004022504A1 (en) * 2002-08-02 2004-03-18 Charles Edgar Price Cementitious composition comprising bottom ash, methods of making and use thereof
US8118927B2 (en) 2002-08-02 2012-02-21 Price Charles E Cementitious compositions and methods of making and using
US7716901B2 (en) 2004-05-27 2010-05-18 Price Charles E Packaging for particulate and granular materials

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