CN1821157A - Composite additive capable of preventing CA mortar laminated segregation - Google Patents
Composite additive capable of preventing CA mortar laminated segregation Download PDFInfo
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- CN1821157A CN1821157A CNA2006100184405A CN200610018440A CN1821157A CN 1821157 A CN1821157 A CN 1821157A CN A2006100184405 A CNA2006100184405 A CN A2006100184405A CN 200610018440 A CN200610018440 A CN 200610018440A CN 1821157 A CN1821157 A CN 1821157A
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- Prior art keywords
- mortar
- composite additive
- flyash
- wilkinite
- silicon ash
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- 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
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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Road Paving Structures (AREA)
Abstract
The present invention relates to a kind of composite additive capable of preventing CA mortar from laminating segregation. The present invention features that the composite additive consists of silica fume 100 weight portions, bentonite 5-350 weight portions and flyash 0-250 weight portions. The bentonite is one of sodium-base bentonite, calcium-base bentonite and sodium-calcium base bentonite, or their mixture, and has specific surface area 400-1000 sq m/kg; the silica fume has specific surface area18000-23000 sq m/kg; and the flyash has specific surface area300-800 sq m/kg. The composite additive of the present invention has the functions of improving the work performance of CA mortar, preventing CA mortar from laminating segregation, raising the early strength of CA mortar and raising the antifreeze and durability of CA mortar, and has wide application foreground in high speed railway construction.
Description
Technical field
The present invention relates to a kind of composite additive that can effectively prevent the CA mortar laminated segregation.
Technical background
Along with the enhancing of overall national strength, China Express Railway net construction plan will progressively put into practice, estimate that before the year two thousand twenty China will tentatively build up speed per hour and reach high-speed railway net more than the 200km/h.The CA mortar is the key components of plate-type slag-free orbit, can make track have rational elasticity on the one hand, be convenient on the other hand adjust the track construction error, so the use of CA mortar elastic damping material all has important effect for improving train security of running at high speed and the comfortableness of taking.In addition, compare with the high elastic rubber material, it also have with track plate bottom surface contact, convenient construction, cost performance advantages of higher, so the CA mortar is from once the fervent concern that this area relevant personnel occur causing, and has broad application prospects in actual applications.
Adopt the CA mortar of basic raw material preparations such as emulsified bitumen, cement, sand, air entrapment agent to exist laminated segregation big at present, later stage contraction, the not high shortcoming of early strength directly affect CA mortar construction speed, later stage use properties and life-span.High-speed railway design track is smooth, and the usage period in life-span is long, requires not keep in repair substantially in the usage period or few maintenance, and the homogeneity and the weather resistance that therefore improve the CA mortar are most important.Yet in the CA mortar, the density of emulsified bitumen and cement differs about 3 times, the density of emulsified bitumen and sand differs about 2.5 times, therefore be easy to laminated segregation, be that pitch floats to the surface of CA mortar, because the free evaporation of water that produces behind the emulsified bitumen breakdown of emulsion can make the CA mortar produce bigger volumetric shrinkage, thereby directly affects the workability and the life-time service performance of CA mortar; But existing C A mortar product does not well address these problems, though the CA mortar product separation degree that has less than 3%, still resolution is higher.
Summary of the invention
The object of the present invention is to provide a kind of composite additive that can effectively prevent the CA mortar laminated segregation.
Technical scheme of the present invention is: a kind of composite additive that can effectively prevent the CA mortar laminated segregation, and it is characterized in that: it comprises silicon ash and wilkinite, the shared weight part of each raw material is: the silicon ash: 100 parts, wilkinite: 5-350 part, flyash: 0-250 part; Described wilkinite is any or two or more mixing in sodium bentonite, calcium-base bentonite, the Sodium base bentonite, and two or more mixing is any proportioning, specific surface area 400-1000m
2/ kg; The specific surface area of silicon ash is 18000-23000m
2/ kg; The specific surface area of flyash is 300-800m
2/ kg.
The shared weight part of described wilkinite is: 80-200 part.
The shared weight part of described flyash is: 10-250 part.
The silicon ash is the silicon ash of homemade or import, and specific surface area is 18000-23000m
2/ kg.
Described flyash is any or the two kinds of mixing in I level flyash, the II level flyash, two kinds when mixing, be any proportioning, and specific surface area is 300-800m
2/ kg.
Flyash is for doing ash discharge or wet ash discharge, as long as meet national I level ash, II level ash standard.Wilkinite can be inorganic, also can be the organobentonite of crossing through organic process.
Above-mentioned a kind of preparation method that can effectively prevent the composite additive of CA mortar laminated segregation be all raw material proportionally weighing good after, add stirrer together and stir simultaneously, stirring gets final product, and generally stirs 30-300 second.
A kind of composite additive of CA mortar laminated segregation that can effectively prevent is applied in the CA mortar, and the composite additive add-on that can effectively prevent the CA mortar laminated segregation is the 0.4-10% of the weight of CA mortar.
The present invention adopts silicon ash and wilkinite (sodium bentonite, calcium-base bentonite, Sodium base bentonite), perhaps add the compound composite additive that obtains of flyash again, mix composite additive of the present invention at home and abroad at the CA mortar, can make original laminated segregation (resolution＞3%), shrink the bigger not stratified segregation of CA mortar (resolution can＜0.5%), can reduce its contraction and increase its early strength simultaneously.Composite additive provided by the invention has the workability that improves the CA mortar, prolong its operable time, can stop CA mortar generation laminated segregation well, and can increase the early strength of CA mortar, also can improve simultaneously the frost resistance and the weather resistance of CA mortar, in the high-speed railway of China's Large scale construction, have broad application prospects.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
The composite additive that can effectively prevent the CA mortar laminated segregation provided by the invention comprises the content of two aspects.
1, adopt silicon ash and wilkinite to make additive, by introducing nano level silicon ash particle and bentonite clay particle simultaneously, silicon ash and bentonite clay particle can increase the viscosity of slurry, and bentonite clay particle be dispersed in that cement and emulsified bitumen form with after in the body, its laminate structure energy water-swelling prevents the contraction of CA mortar, can form the new slurry of stabilized uniform simultaneously, and have thixotropy, can prevent the CA mortar laminated segregation.Silicon ash and wilkinite are listed in the table 1 the salient features influence of CA mortar as additive.
Table 3 silicon ash and wilkinite are as the salient features influence of additive to the CA mortar
| Embodiment | Cement: emulsified bitumen: add water: sand: additive (silicon ash: wilkinite) (weight part) | Main performance index | ||||
| Operable time/minute | 24h rate of expansion/% | Ultimate compression strength/MPa | Material separation degree/% | |||
| 1d | 3d/ | |||||
| 1 | 100∶160∶20∶200∶(0∶0) | 18 | -1.8 | 0.1 | 0.3 | 20 |
| 2 | 100∶160∶20∶200∶(10∶10) | 70 | -0.7 | 0.25 | 0.4 | 1.4 |
| 3 | 100∶160∶20∶200∶(10∶20) | 80 | -0.4 | 0.25 | 0.35 | 0.8 |
| 4 | 100∶160∶20∶200∶(20∶20) | 88 | -0.2 | 0.20 | 0.4 | 0.5 |
Testing method is carried out according to Japanese building association prepacked aggregate concrete test method in the table 1.Pitch is for splitting the fast type non ionic emulsified bitumen that coagulates slowly, and cement is early strong normal silicate 42.5R cement, and the silicon ash is a Wuhan Iron and Steel Plant silicon ash, and wilkinite is that sodium bentonite 30%, calcium-base bentonite 40% and Sodium base bentonite 30% constitute by weight percent.
As can be seen from Table 1: the additive that silicon ash and wilkinite are formed can improve homogeneity, operable time and the early strength of CA mortar, reduces the contraction of CA mortar.
2, employing silicon ash, flyash and wilkinite are made additive, by introducing nano level silicon ash particle and bentonite clay particle simultaneously, and micron-sized fly ash grain, silicon ash and bentonite clay particle can increase the viscosity of slurry, and bentonite clay particle be dispersed in that cement and emulsified bitumen form with after in the body, the energy water-swelling, prevent the contraction of CA mortar, simultaneously can form the new slurry of stabilized uniform, and have thixotropy, favourable to its degree of mobilization, the globular glass microballon also can increase the flowability of CA mortar in the while flyash, optimize the grain composition of aggregate, under the situation that keeps good fluidity, prevent the CA mortar laminated segregation.Silicon ash, flyash and wilkinite are listed in the table 4 the salient features influence of CA mortar as tackifier.
Table 2 silicon ash, flyash and wilkinite are as the salient features influence of additive to the CA mortar
| Embodiment | Cement: emulsified bitumen: add water: sand: additive (silicon ash: flyash: wilkinite) (weight part) | Main performance index | ||||
| Operable time/minute | 24h rate of expansion/% | Ultimate compression strength/MPa | Material separation degree/% | |||
| 1d | 3d | |||||
| 1 | 100∶160∶20∶200∶(0∶0∶0) | 18 | -1.8 | 0.1 | 0.3 | 20 |
| 5 | 100∶160∶20∶200∶(10∶10∶5) | 72 | -0.4 | 0.2 | 0.4 | 1.0 |
| 6 | 100∶160∶20∶200∶(10∶20∶10) | 83 | -0.3 | 0.3 | 0.35 | 0.5 |
| 7 | 100∶160∶20∶200∶(20∶20∶5) | 88 | -0.1 | 0.25 | 0.4 | 0.3 |
Testing method is carried out according to Japanese building association prepacked aggregate concrete test method in the table 2.Pitch is for splitting the fast type non ionic emulsified bitumen that coagulates slowly, and cement is early strong normal silicate 42.5R cement, and the silicon ash is a Wuhan Iron and Steel Plant silicon ash, and flyash is I level ash, and wilkinite is a calcium-base bentonite.
As can be seen from Table 2: the additive that silicon ash, flyash and wilkinite are formed can improve homogeneity, operable time and the early strength of CA mortar, reduces the contraction of CA mortar, can effectively prevent the CA mortar laminated segregation.
Embodiment 8:
300kg cement+480kg emulsified bitumen+600kg sand+60kg adds water+60kg composite additive (30kg silicon ash+30kg calcium-base bentonite), all raw material proportionally weighing good after, add stirrer together and stirred simultaneously 100 seconds.The key technical indexes of the CA mortar of making is: operable time 70 minutes, rate of expansion-0.7%, 1d ultimate compression strength 0.25MPa, 3d ultimate compression strength 0.4MP, material separation degree 1.1%.
Embodiment 9:
300kg cement+480kg emulsified bitumen+600kg sand+60kg adds water+90kg composite additive (30kg silicon ash+30kg flyash I level ash+30kg calcium-base bentonite), all raw material proportionally weighing good after, add stirrer together and stirred simultaneously 100 seconds.The key technical indexes of the CA mortar of making is: operable time 75 minutes, rate of expansion-0.4%, 1d ultimate compression strength 0.25MPa, 3d ultimate compression strength 0.4MP, material separation degree 0.6%.
Embodiment 10:
A kind of composite additive that can effectively prevent the CA mortar laminated segregation, it mainly is made of silicon ash, wilkinite and flyash, and the shared weight part of each raw material is: the silicon ash: 100 parts, wilkinite: 80 parts, flyash: 10 parts; Described wilkinite is a sodium bentonite, specific surface area 600m
2More than/the kg; The specific surface area of silicon ash is 18000m
2More than/the kg; The specific surface area of flyash is 400-800m
2/ kg.All raw material proportionally weighing good after, add stirrer together and stirred simultaneously 100 seconds.A kind of composite additive of CA mortar laminated segregation that can effectively prevent is applied in the CA mortar, the composite additive add-on that can effectively prevent the CA mortar laminated segregation be the CA mortar weight 0.4%.
Embodiment 11:
A kind of composite additive that can effectively prevent the CA mortar laminated segregation, it mainly is made of silicon ash, wilkinite and flyash, and the shared weight part of each raw material is: the silicon ash: 100 parts, wilkinite: 200 parts, flyash: 250 parts; Described wilkinite is a sodium bentonite, specific surface area 600m
2More than/the kg; The specific surface area of silicon ash is 18000m
2More than/the kg; The specific surface area of flyash is 400-800m
2/ kg.All raw material proportionally weighing good after, add stirrer together and stirred simultaneously 100 seconds.A kind of composite additive of CA mortar laminated segregation that can effectively prevent is applied in the CA mortar, the composite additive add-on that can effectively prevent the CA mortar laminated segregation be the CA mortar weight 10%.
The bound value and the interval value of silicon ash of the present invention, wilkinite and powdered coal ash can both be realized the present invention, just do not enumerate embodiment one by one at this.
Claims (3)
1. composite additive that can effectively prevent the CA mortar laminated segregation, it is characterized in that: it comprises silicon ash and wilkinite, the shared weight part of each raw material is: the silicon ash: 100 parts, wilkinite: 5-350 part, flyash: 0-250 part; Described wilkinite is any or two or more mixing in sodium bentonite, calcium-base bentonite, the Sodium base bentonite, and two or more mixing is any proportioning, specific surface area 400-1000m
2/ kg; The specific surface area of silicon ash is 18000-23000m
2/ kg; The specific surface area of flyash is 300-800m
2/ kg.
2. a kind of composite additive that can effectively prevent the CA mortar laminated segregation according to claim 1, it is characterized in that: the shared weight part of described wilkinite is: 80-200 part.
3. a kind of composite additive that can effectively prevent the CA mortar laminated segregation according to claim 1, it is characterized in that: the shared weight part of described flyash is: 10-250 part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100184405A CN100337970C (en) | 2006-02-28 | 2006-02-28 | Composite additive capable of preventing CA mortar laminated segregation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100184405A CN100337970C (en) | 2006-02-28 | 2006-02-28 | Composite additive capable of preventing CA mortar laminated segregation |
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| Publication Number | Publication Date |
|---|---|
| CN1821157A true CN1821157A (en) | 2006-08-23 |
| CN100337970C CN100337970C (en) | 2007-09-19 |
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|---|---|---|---|
| CNB2006100184405A Expired - Fee Related CN100337970C (en) | 2006-02-28 | 2006-02-28 | Composite additive capable of preventing CA mortar laminated segregation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100558669C (en) * | 2007-12-19 | 2009-11-11 | 同济大学 | A kind of composite water-retaining thickening material and using method thereof that is used for commodity mortar |
| CN102070354A (en) * | 2010-12-10 | 2011-05-25 | 浙江大学 | Method for preparing cement asphalt (CA) mortar for China railway track system (CRTS) II slab ballastless tracks |
| CN102093000A (en) * | 2010-12-10 | 2011-06-15 | 浙江工业大学 | CRTS II type slab ballastless track cement asphalt (CA) mortar |
| CN102173628A (en) * | 2011-03-16 | 2011-09-07 | 江苏博特新材料有限公司 | Shrinkage-reducing compound additive capable of effectively reducing CA (cement and asphalt) mortar bleeding, and CA mortar dry material and CA mortar containing same |
| CN103204646A (en) * | 2012-01-17 | 2013-07-17 | 中国铁道科学研究院铁道建筑研究所 | Special stabilizing agent for cement-emulsified asphalt mortar |
| CN106565124A (en) * | 2015-10-09 | 2017-04-19 | 中建西部建设股份有限公司 | Expanded alkyl air entraining agent |
| CN111484305A (en) * | 2020-04-25 | 2020-08-04 | 广西交通职业技术学院 | CA mortar for plate-type ballastless track and production method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100509685C (en) * | 2004-04-06 | 2009-07-08 | 株洲时代新材料科技股份有限公司 | Cement asphalt mortar in use for ballastless track in railroad or city light rail, as well as fabricating method and construction method thereof |
-
2006
- 2006-02-28 CN CNB2006100184405A patent/CN100337970C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100558669C (en) * | 2007-12-19 | 2009-11-11 | 同济大学 | A kind of composite water-retaining thickening material and using method thereof that is used for commodity mortar |
| CN102070354A (en) * | 2010-12-10 | 2011-05-25 | 浙江大学 | Method for preparing cement asphalt (CA) mortar for China railway track system (CRTS) II slab ballastless tracks |
| CN102093000A (en) * | 2010-12-10 | 2011-06-15 | 浙江工业大学 | CRTS II type slab ballastless track cement asphalt (CA) mortar |
| CN102173628A (en) * | 2011-03-16 | 2011-09-07 | 江苏博特新材料有限公司 | Shrinkage-reducing compound additive capable of effectively reducing CA (cement and asphalt) mortar bleeding, and CA mortar dry material and CA mortar containing same |
| CN103204646A (en) * | 2012-01-17 | 2013-07-17 | 中国铁道科学研究院铁道建筑研究所 | Special stabilizing agent for cement-emulsified asphalt mortar |
| CN103204646B (en) * | 2012-01-17 | 2015-09-02 | 中国铁道科学研究院铁道建筑研究所 | Cement emulsified asphalt mortar is stabilizing agent specially used |
| CN106565124A (en) * | 2015-10-09 | 2017-04-19 | 中建西部建设股份有限公司 | Expanded alkyl air entraining agent |
| CN111484305A (en) * | 2020-04-25 | 2020-08-04 | 广西交通职业技术学院 | CA mortar for plate-type ballastless track and production method thereof |
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| Publication number | Publication date |
|---|---|
| CN100337970C (en) | 2007-09-19 |
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Owner name: HUBEI GUOCHUANG HI-TECH MATERIAL CO., LTD. Free format text: FORMER OWNER: GUOCHUANG GAOKE INDUSTRY GROUP CO., LTD., HUBEI Effective date: 20100727 |
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Free format text: CORRECT: ADDRESS; FROM: 430074 17/F, GAOKE BUILDING, GUANDONG SCIENCE PARK, WUCHANG DISTRICT, WUHAN CITY, HUBEI PROVINCE TO: 430074 17/F, GAOKE BUILDING, GUANDONG SCIENCE PARK, WUCHANG, WUHAN CITY |
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Effective date of registration: 20100727 Address after: 430074, 17 building, hi tech building, Kanto science and Technology Park, Wuchang, Wuhan Co-patentee after: Wuhan University of Technology Patentee after: Hubei Guochuang Hi-tech Material Co., Ltd. Address before: 430074, 17 floor, hi tech building, Kanto Science Park, Wuchang District, Wuhan, Hubei Co-patentee before: Wuhan University of Technology Patentee before: Guochuang Gaoke Industry Group Co., Ltd., Hubei |
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Granted publication date: 20070919 Termination date: 20180228 |
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