CN1120522A - 包裹骨架，尤其是包裹预应力骨架的注入料浆 - Google Patents

包裹骨架，尤其是包裹预应力骨架的注入料浆 Download PDF

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CN1120522A
CN1120522A CN95104032A CN95104032A CN1120522A CN 1120522 A CN1120522 A CN 1120522A CN 95104032 A CN95104032 A CN 95104032A CN 95104032 A CN95104032 A CN 95104032A CN 1120522 A CN1120522 A CN 1120522A
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slip
perfusion
frame
precipitated silica
particullarly
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CN1041623C (zh
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J·杜加特
L·弗鲁尼
E·普拉特
P·里查德
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Bouygues SA
Rhodia Chimie SAS
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Rhone Poulenc Chimie SA
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    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/06—Quartz; Sand
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/06—Quartz; Sand
    • C04B14/062—Microsilica, e.g. colloïdal silica
    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
    • 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
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • 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
    • C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Materials For Medical Uses (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Lubricants (AREA)
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  • Ropes Or Cables (AREA)
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Abstract

本发明涉及用于包裹骨架的灌注料浆。
这种料浆含有约1.5-3％(重量)(以水泥重量计)亲水的，对液体惰性的微粒，其微粒比表面超过约200米2/克，在混合和/或灌注时，分离成多片，其片的大小可以小到5纳米，可以大到300纳米。
这种料浆尤其适于包裹预应力骨架。

Description

包裹骨架，尤其是包裹预应力骨架 的注入料浆
本发明涉及一种以水泥和水为基，用于包裹骨架，尤其是包裹预应力骨架的注入料浆。
预应力骨架包裹，其包裹长度较长则更加难以满足地进行，已知这种长度在钢筋的情况下在高处可达到10-15米，在长钢筋的情况下可达到数百米。
本发明的一个目的是使注入料浆使用方便。
本发明的另外一个目的是降低返潮。
本发明还有一个目的是减少料浆硬化而造成骨架钢变脆的危险。
按照本发明，为了使灌注料浆使用方便，并降低返潮，在料浆中加入约1.5-3％(重量)(以水泥重量计)亲水的、对液体呈惰性的微粒，其比表面超过约200米2/克，并且在混合和/或注入期间分成许多片，片的大小可以小到5纳米，可以大到300纳米。
例如，可以使用其比表面为210-300米2/克的微粒。
关于比表面，在这里应理解为BET比表面，具体地是采用Brunauer-Emmet-Teller法测定的，该法在“The Journal ofthe American Chemical Society”vol 60，P309，2，1938，以及相应的ISO5794/1标准(附录1)”中作过描述。
优选地，使用的微粒在分级之前平均大小小于20微米，优选地小于15微米，在0.3-1.5微米之间更好，典型地为0.5微米级。
在具有上述特征的材料中，优选具有硅质材料，典型地为一种由沉淀二氧化硅微粒组成的外加剂。
关于沉淀的二氧化硅，这里应理解为由碱金属硅酸盐与一般为无机酸在该介质中适宜于沉淀的PH下，尤其是碱性、中性或弱酸性的PH下进行反应沉淀得到的二氧化硅，二氧化硅制备方式可以是任何一种(将酸加到硅酸盐槽底，将全部或部分的酸和硅酸盐同时加到水槽底或硅酸盐溶液槽底等)，制备方式可以根据所要求得到的二氧化硅类型以本身已知的方式进行选择。
沉淀的二氧化硅可以粉末(干的)，或可能以含水悬浮液(或浆)使用。
曾提出在注入料浆中加入二氧化硅(FR-A-2621036)以获得某些优点，但是它涉及的二氧化硅微粒的物理化学特性，与本发明适全的沉淀二氧化硅颗粒的有很大差异。
将本发明使用的外加剂加到水泥料浆中，其料浆组成可能本身是经典的，以水泥重量计这种外加剂的比例并不关键，但每100公斤水泥为2-3公斤沉淀二氧化硅这一比例得到良好的结果除外。
除了按照本发明添加的外加剂之外，水泥浆通常含有其他常常的外加剂，如缓凝剂、流化剂等。 实施例
下面结合唯一的附图说明使用本发明的实施例，该附图示出两根分别装有本发明料浆和常用料浆注入管，和骨架。
按照下述过程将下述组分混合制成料浆。
-在43升水中，加入4.9升流化剂(SKW公司的“Melmentplast40”1.6升缓凝剂(SKW公司的“Melretard”)
将其混合物放入注入机混合部分(VSL混合器)
在液体部分，加150公斤水泥(Ciments Lafarge公司的CPA HP PM du Havre)和3.75公斤沉淀二氧化硅(Rhone-Poulenc公司的Tixosil T331)，该二氧化硅比表面为约250米2/克。
混合三分钟后，得到的料浆具有下述特性：
               测定的特性            规定的规格(法国)流动性            在T＝0小时12秒用Marsh维         T＝1小时13秒φ10mm，20℃      T＝3小时16秒
              T＝6小时20秒             ＜24秒渗出              在3小时0％               ＜2％收缩              在28天2160×100-6m/m    ＜3000×10-6m/m机械强度          在28天压力：95MPa        ＞30MPa用4×4×16cm      在28天挠度：7MPa         ＞4MPa三棱镜测定
按照上述实施例制造的混合物三十小时仍是流体。通过改变缓凝剂的量，尤其若涉及预应力钢筋的注入和根据其长度，这种时间依据其应用而可调制。
使用沉淀二氧化硅的料浆实际上不倾析，并能保证良好包裹锚固的预应力钢筋，这里，通常的料浆必需对困难的灌浆加以修理。
人们以5巴的压力将这种料浆灌注到4.5米的垂直透明管(1)底，其中有股线(2)和在管顶这些股线的锚周(3)。在相同时管(1′)中，灌注市售的常用料浆。数小时后对这两种管子作一比较。
人们观察到，在常用料浆的情况下，在锚固下面7厘米无包裹M，在锚固上17厘米无包裹M，在特别需要极好包裹的区域，离锚固很远才有非常小(1厘米)包裹m。
在一施工现场灌注高二十米预应力钢筋，并证实了实施室的试验；灌注期间，料浆保持均匀，后来几乎求倾析，与对整个施工现场已预料到的，准备作商品使用的产品相反，这种产品在灌注时已经将钢筋高处冲净，它需要对几根钢筋补充灌注。
人们会注意到，与已经考虑使用的硅灰相比，沉淀二氧化硅尤其具有以下优点：
a)沉淀二氧化硅能与水混合较好，因此，非常明显降低返潮，这是在钢筋周围灌注时其中一个主要困难；
b)由于在沉淀二氧化硅中无游离的硅，所以不产生新生的氢；
c)性能均匀(倾析与渗出)，沉淀二氧化硅需要量明显低于必不可少的硅灰量；
d)有可能选择适宜于获得所要求的流动性与触变法的沉淀二氧化硅，因为这在生产沉淀二氧化硅范围内都存在，而在硅灰的情况下这种选择是不可能的，这种二氧化硅作为副产物是可自由处理的。
本发明还不受这些实施例的限制，而这些实施例只是作为说明。

Claims (6)

1.以水泥和水为基并且用于包裹骨架的灌注料浆，其特征在于它含有约1.5-3％(重量)(以水泥重量计)亲水的，对液体惰性的颗粒，其颗粒比表面高于200米2/克，并在混合和/或灌注时分离成多片，其片的大小可以小到5纳米，可以大到300纳米。
2.根据权利要求1所述的灌注料浆，其特征在于在加入料浆之前，其微粒平均大小小于20微米。
3.根据权利要求2所述的灌注料浆，其特征在于在加入料浆之前，其微粒平均大小小于15微米。
4.根据权利要求3所述的灌注料浆，其特征在于在加入料浆之前，其微粒平均大小为0.3-1.5微米。
5.根据权利要求1-4之任一权利要求所述的灌注料浆，其特征在于使用沉淀二氧化硅颗粒。
6.根据权利要求1-5之任一权利要求所述料浆应用于包裹预应力骨架。
CN95104032A 1994-03-21 1995-03-21 包裹骨架，尤其是包裹预应力骨架的注入料浆 Expired - Fee Related CN1041623C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9403261A FR2717465B1 (fr) 1994-03-21 1994-03-21 Coulis d'injection pour enrober une armature, notamment une armature de précontrainte.
FR9403261 1994-03-21

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CN1120522A true CN1120522A (zh) 1996-04-17
CN1041623C CN1041623C (zh) 1999-01-13

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US (2) US5814145A (zh)
EP (1) EP0673897B1 (zh)
JP (1) JP2742890B2 (zh)
KR (1) KR0148907B1 (zh)
CN (1) CN1041623C (zh)
AT (1) ATE169607T1 (zh)
BR (1) BR9501139A (zh)
CA (1) CA2145032C (zh)
DE (1) DE69503945T2 (zh)
FI (1) FI951292A (zh)
FR (1) FR2717465B1 (zh)
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CN113530236B (zh) * 2021-07-20 2022-07-22 中国水利水电第十二工程局有限公司 用于滩涂光伏电站的施工方法

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FI951292A (fi) 1995-09-22
DE69503945D1 (de) 1998-09-17
KR950032000A (ko) 1995-12-20
NO951054D0 (no) 1995-03-20
KR0148907B1 (ko) 1998-10-15
CA2145032C (fr) 2000-02-01
CA2145032A1 (fr) 1995-09-22
EP0673897B1 (fr) 1998-08-12
BR9501139A (pt) 1996-06-04
EP0673897A1 (fr) 1995-09-27
FR2717465A1 (fr) 1995-09-22
US5814145A (en) 1998-09-29
DE69503945T2 (de) 1999-04-01
ATE169607T1 (de) 1998-08-15
CN1041623C (zh) 1999-01-13
NO315317B1 (no) 2003-08-18
NO951054L (no) 1995-09-22
FR2717465B1 (fr) 1996-04-26
TW380126B (en) 2000-01-21
JP2742890B2 (ja) 1998-04-22
US5904765A (en) 1999-05-18
JPH0834646A (ja) 1996-02-06
FI951292A0 (fi) 1995-03-20

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