CN101767966A - Self-compacting concrete for turnout junction of ballastless track - Google Patents
Self-compacting concrete for turnout junction of ballastless track Download PDFInfo
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- CN101767966A CN101767966A CN201010101400A CN201010101400A CN101767966A CN 101767966 A CN101767966 A CN 101767966A CN 201010101400 A CN201010101400 A CN 201010101400A CN 201010101400 A CN201010101400 A CN 201010101400A CN 101767966 A CN101767966 A CN 101767966A
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- self
- concrete
- compacting concrete
- ballastless track
- turnout junction
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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
- 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
- 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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00103—Self-compacting mixtures
-
- 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
- C04B2111/343—Crack resistant 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technology and formula of concrete mix proportion design, and provides self-compacting concrete for the turnout junction of a high-durability and crack resistant ballastless track. The self-compacting concrete for the turnout junction of the ballastless track consists of the following components in percentage by weight: 14 to 17 percent of cement, 11 to 14 percent of slag powder, 36 to 39 percent of fine aggregate, 25 to 27 percent of coarse aggregate, 8 to 9 percent of water, 0.2 to 0.3 percent of water reducer and 0.04 to 0.06 percent of swelling agent. The self-compacting concrete has the characteristics of microdilatancy, vibration free, flowability and self-compactability, and can reduce cracks of the concrete and strengthen the durability of the concrete.
Description
Technical field
The present invention relates to mix Design technology and prescription, be specially non-fragment orbit track switch plate process of deployment bed-plate MIX DESIGN OF SELF COMPACTING CONCRETE and basic recipe.
Background technology
The board-like solid concrete roabed laying construction of track switch technology is a kind of novel track switch solid concrete roabed operating technique, and the performance of self-compacting concrete is one of key factor of track switch plate laying quality.Self-compacting concrete is a kind of new concrete, the ultimate principle of preparation is to be reduced to optimum range by compound, the fine adulterant of admixture and the selection of coarse-fine aggregate and the yielding stress that collocation makes concrete mix, concrete mix has very high flowability simultaneously, can be full of model from levelling, and not bleeding, do not emanate, quality is even after the moulding.The self-compacting concrete without vibration; can save labor force and electric power; increase work efficiency; the harm that the noise that exempting vibrates is produced causes to environment; and can solve leakage in the construction of some conventional concrete shakes, crosses and shake and the close row reinforcing bar perfusion problems such as difficulty of vibrating; can also protect the position of reinforcing bar, built-in fitting (rail clip), prestressed pore passage not to be shifted, and self-compacting concrete uses a large amount of industrial wastes to do Additive, played certain environmental-protection function because of vibrating.
Publication number is the disclosed a kind of non-fragment orbit self-leveling concrete of the Chinese invention patent of CN101186476A, by cement, breeze, fine aggregate, coarse aggregate, swelling agent, admixture and water are formed, wherein the shared weight percent of cement is 15%-18%, the shared weight percent of mineral aggregate powder is 8%-11%, the shared weight percent of fine aggregate is 35%-38%, the shared weight percent 27%-30% of coarse aggregate, the shared weight percent of swelling agent is 2%-2.5%, the shared weight percent of admixture is 0.33%-0.37%, the shared weight percent of water is 7%-7.5%, and this concrete has high workability, high cohesion, high-moisture-retention and little bloated performance.But also exist more concrete shrinkage crackle in test with in using, cause its weather resistance and splitting resistance relatively poor.
Summary of the invention
Technical problem to be solved by this invention provides the self-compacting concrete for turnout junction of ballastless track of a kind of high-durability and splitting resistance.
For solving above technical problem, the technical solution used in the present invention is: a kind of self-compacting concrete for turnout junction of ballastless track, be made up of cement, slag powders, fine aggregate, coarse aggregate, water, water reducer and swelling agent, the weight percent of each component is: cement 14%～17%; Slag powders 11%～14%; Fine aggregate 36%～39%; Coarse aggregate 25%～27%; Water 8%～9%; Water reducer 0.2%～0.3%; Swelling agent 0.04%～0.06%.
The present invention adopts more slag powders as adulterant, by its active effect, improved concrete cohesiveness, education resistance and water retention property, lowered concrete hydration heat simultaneously, reduce concrete seminess, improved concrete later stage endurance quality; By adding an amount of efficient retarding and water reducing agent, reduced the consumption of water, prolonged concrete time of coagulation, reduced the divergence loss of fresh concrete, promoted concrete adhesive aggregation performance; Adopt the coarse aggregate of more fine aggregate and small particle size and more gelling material acting in conjunction, improved concrete flowability and guaranteed the flow homogeneity of process of concrete, make concrete that bigger divergence can be arranged and do not emanate; By adding an amount of swelling agent, make concrete have micro-expansibility, guaranteed the good combination of concrete and mat surface and track switch plate bottom surface; The present invention adopts the aluminium powder agent as swelling agent, and than obvious with other class swelling agent effect, and volume is few, and is little to the influence of concrete overall performance.
As a kind of optimized technical scheme, the weight percent of each component is: cement 14.8%; Slag powders 12.6%; Fine aggregate 38.2%; Coarse aggregate 25.5%; Water 8.6%; Water reducer 0.27%; Swelling agent 0.04%.
Self-compacting concrete for turnout junction of ballastless track of the present invention compared with prior art, but except that characteristics with microdilatancy, without vibration self-flowing dense, can also reduce concrete cracks, strengthened concrete weather resistance better, maximum horizontal flows apart from 7m, maximum free-falling degree 1.0m, strength grade C40.Its concrete characteristics comprise: (1) flowability: concrete in the 18cm space, has under the condition of reinforcing mat under the track switch plate, and energy maximum fluidity 4.8m also is filled with whole track switch bed-plate.Divergence reaches 650mm～760mm.(2) self compacting ability: concrete need not vibrate, and can flow automatically to be filled with whole model and not produce bubble, honeycomb, pitted skin etc.(3) high-moisture-retention: fresh concrete in course of hardening, bleeding not.(4) high cohesion: concrete does not disperse cast, mobile reaching in the process of setting, does not emanate.(5) shrinkage-void: concrete does not shrink microdilatancy in sclerosis and intensity raising process.(6) good weather resistance: can satisfy weather resistance technical requirements such as frost resistance, displacement flux.(7) good splitting resistance: the anti-strong test splitting resistance of concrete is good.
Embodiment
A kind of self-compacting concrete for turnout junction of ballastless track of the present invention is made up of cement, sand ground-slag, fine aggregate, coarse aggregate, water, water reducer and swelling agent, it is characterized in that the weight percent of each component is: cement 14%～17%; Slag powders 11%～14%; Fine aggregate 36%～39%; Coarse aggregate 25%～27%; Water 8%～9%; Water reducer 0.2%～0.3%; Swelling agent 0.04%～0.06%.
Every raw material technical requirement is as follows:
1, starting material require and are selected
1.1 cement
Cement adopts ordinary Portland cement, and surface-area is generally used P.O42.5 cement at 350～450mm2/g.Sulphate content is low in the cement, and muriate and alkali content meet the requirements.The splendid peak board P.O42.5 cement that this proportioning adopts splendid peak, Hunan Cement Group to produce, the key technical indexes meet table 1 regulation:
Table 1 (cement the key technical indexes)
Other technical indicator should meet the regulation of GB175.
1.2 Additive:
Additive adopts blast-furnace cinder micro-powder, and S95 level, this proportioning adopt Hunan safe capital construction material company limited to produce the S95 grade slag powder.The key technical indexes meets table 2 regulation:
Table 2 (breeze the key technical indexes)
1.3 fine aggregate
Fine aggregate adopts that material is hard, cleaning surfaces, the rational fineness modulus of grating are 2.5～3.0 natural river sand.This proportioning adopts Xiang River river, Heng Shan, Hunan Province sand (fineness modulus 2.7), and the key technical indexes sees Table 3.
Table 3 (fine aggregate the key technical indexes)
1.4 coarse aggregate
Coarse aggregate adopts the 5-10mm graded broken stone, and mass color density is 2500～2900kg/m
3The aggregate shape for cubes or short and thick shape, avoids using faller gill shape aggregate as far as possible, increases the workability of self-compacting concrete.The aggregate apparent density is not more than 2900kg/m
3If, the too big segregation easily of aggregate density.Water-intake rate should＜2%, the higher aggregate of water-intake rate reduces concrete workability easily, and causes mortar and aggregate cohesiveness poor easily.Aggregate ultimate compression strength is 100MPa at least.The key technical indexes meets table 4 regulation:
Table 4 (coarse aggregate the key technical indexes)
Other technical indicator should meet the regulation in " railway concrete structure durability design temporary provisions ".
1.5 admixture
1.5.1 Rheoplus (W1) the type concrete high-efficiency retardation water reducing agent that efficient retardation water reducing agent (polycarboxylic acid series), this proportioning adopt BASF chemical building material (Shanghai) Co., Ltd. to produce.The key technical indexes meets table 5 regulation:
Table 5 (water reducer the key technical indexes)
1.5.2 swelling agent: adopt the special SC115 type (pulvis) of Beijing Mace
The key technical indexes meets table 6 regulation:
Table 6 (swelling agent the key technical indexes)
1.6 mixing water
Mixing water adopts tap water, and the key technical indexes meets table 7 regulation:
Table 7 (the key technical indexes of water)
Self-compacting concrete is very high to the requirement of workability, need satisfy following three features simultaneously: (1) filling capacity, claim the unrestricted flow ability again, and motion and safety are full of template spatial ability in template.(2) handling capacity claims the restricted flow ability again.As by the reinforcing mat gap, and the ability of not emanating or blocking.(3) anti-separating power, i.e. stability.Finger keeps the ability of component uniformity in transportation.
There are difference in self-compacting concrete and normal concrete on proportioning is selected, show that mainly water-cement ratio, sand coarse aggregate ratio and unit gather materials on the determining of consumption mutually: (1) water-cement ratio, the water-cement ratio of self-compacting concrete must be taken all factors into consideration the requirement of aspects such as concrete flowability, intensity, weather resistance, and maximum water-cement ratio is 0.35.(2) sand coarse aggregate ratio, sand coarse aggregate ratio is too big possibly can't guarantee required flowability, because the relative movement ability of fine aggregate under action of gravity is not as coarse aggregate, the impulse force of filling when reduction is built in excessive use, sand coarse aggregate ratio is too small, and concrete is emanated easily, and the unit grain weight of fine aggregate is much smaller than coarse aggregate, therefore suspension is better than coarse aggregate, helps to stop the sinking of material.So sand coarse aggregate ratio value in the 50%-60% scope of general recommendations self-compacting concrete.(3) the unit consumption that gathers materials mutually is one of proportioning design important parameter, and is bigger to the workability influence.If grain diameter is bigger than normal, the too high meeting of amount causes contacting between particle and collision opportunity increases, thereby concrete internal friction power is increased, content is lower, help reducing the internal stress of frictional force, can effectively increase the obstacle trafficability characteristic, but reduced intensity and played mould, therefore, the concrete particle particle diameter should≤16mm.
Below be specific embodiments of the invention 1-4:
| Embodiment | Cement (%) | Slag powders (%) | Fine aggregate (%) | Coarse aggregate (%) | Water (%) | Water reducer (%) | Swelling agent (%) |
| ??1 | ??14.8 | ??12.6 | ??38.2 | ??25.5 | ??8.6 | ??0.26 | ??0.04 |
| ??2 | ??14 | ??11.76 | ??39.0 | ??26.2 | ??8.73 | ??0.27 | ??0.04 |
| ??3 | ??17 | ??13 | ??36.74 | ??25 | ??8 | ??0.2 | ??0.06 |
| ??4 | ??16.655 | ??11 | ??36 | ??27 | ??9 | ??0.3 | ??0.045 |
| ??5 | ??15 | ??14 | ??37 | ??25.745 | ??8 | ??0.2 | ??0.055 |
Concrete proportioning (the unit: kg/m of above embodiment
3) be:
| Embodiment | Cement | Slag powders | Fine aggregate | Coarse aggregate | Water | Water reducer | Swelling agent | Gross weight |
| ??1 | ??350 | ??300 | ??906 | ??604 | ??205 | ??6.5 | ??1 | ??2372.5 |
| ??2 | ??336 | ??282.24 | ??936 | ??628.8 | ??209.52 | ??6.48 | ??0.96 | ??2400 |
| ??3 | ??408 | ??312 | ??881.76 | ??600 | ??192 | ??4.8 | ??1.44 | ??2400 |
| ??4 | ??399.72 | ??264 | ??864 | ??648 | ??216 | ??7.2 | ??1.08 | ??2400 |
| ??5 | ??360 | ??336 | ??888 | ??617.88 | ??192 | ??4.8 | ??1.32 | ??2400 |
Claims (9)
1. a self-compacting concrete for turnout junction of ballastless track is made up of cement, slag powders, fine aggregate, coarse aggregate, water, water reducer and swelling agent, it is characterized in that the weight percent of each component is: cement 14%～17%; Slag powders 11%～14%; Fine aggregate 36%～39%; Coarse aggregate 25%～27%; Water 8%～9%; Water reducer 0.2%～0.3%; Swelling agent 0.04%～0.06%.
2. self-compacting concrete for turnout junction of ballastless track according to claim 1 is characterized in that: the weight percent of each component is: cement 14.8%; Slag powders 12.6%; Fine aggregate 38.2%; Coarse aggregate 25.5%; Water 8.6%; Water reducer 0.26%; Swelling agent 0.04%.
3. self-compacting concrete for turnout junction of ballastless track according to claim 1 and 2 is characterized in that: described cement is that specific surface area is at 350～450mm
2The ordinary Portland cement of/g.
4. self-compacting concrete for turnout junction of ballastless track according to claim 1 and 2 is characterized in that: described slag powders is a S95 level blast-furnace cinder micro-powder.
5. self-compacting concrete for turnout junction of ballastless track according to claim 1 and 2 is characterized in that: described fine aggregate is that fineness modulus is 2.5～3.0 natural river sand.
6. self-compacting concrete for turnout junction of ballastless track according to claim 1 and 2 is characterized in that: described coarse aggregate is that mass color density is 2500～2900kg/m
35～10mm graded broken stone.
7. self-compacting concrete for turnout junction of ballastless track according to claim 1 and 2 is characterized in that: described water reducer is the efficient retardation water reducing agent of polycarboxylic acid.
8. self-compacting concrete for turnout junction of ballastless track according to claim 1 and 2 is characterized in that: described swelling agent is an aluminium powder class pulvis.
9. self-compacting concrete for turnout junction of ballastless track according to claim 1 and 2 is characterized in that: described water-binder ratio≤0.35, grain diameter≤16mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010101400A CN101767966A (en) | 2010-01-22 | 2010-01-22 | Self-compacting concrete for turnout junction of ballastless track |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010101400A CN101767966A (en) | 2010-01-22 | 2010-01-22 | Self-compacting concrete for turnout junction of ballastless track |
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| CN101767966A true CN101767966A (en) | 2010-07-07 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102390967A (en) * | 2011-08-11 | 2012-03-28 | 中铁八局集团第四工程有限公司 | Self-compacting concrete for rapid transit railway III-type plate ballastless tracks and preparation method of self-compacting concrete |
| CN102432242A (en) * | 2011-10-08 | 2012-05-02 | 中铁十二局集团有限公司 | Self-compacting concrete for high-speed railway turnout area slab ballastless track filling layer |
| CN102491687A (en) * | 2011-11-11 | 2012-06-13 | 中国铁道科学研究院金属及化学研究所 | Self-compaction concrete used for filling closed space as well as preparation method and application of same |
| CN102617082A (en) * | 2012-04-09 | 2012-08-01 | 中铁七局集团郑州工程有限公司 | Concrete for railway switch base filling layer and pouring method |
| CN103979874A (en) * | 2014-05-15 | 2014-08-13 | 中铁五局（集团）有限公司 | Self-compacting concrete and production process quality control method thereof |
| CN104961404A (en) * | 2015-06-10 | 2015-10-07 | 上海城建物资有限公司 | Super-long-workability steel arch self-compacting concrete |
| CN110818342A (en) * | 2018-08-08 | 2020-02-21 | 四川迈铁龙科技有限公司 | Self-compacting concrete for ground iron plate type ballastless track |
| CN114477862A (en) * | 2020-10-27 | 2022-05-13 | 成都岷江混凝土有限公司 | Production method of high-crack-resistance concrete |
-
2010
- 2010-01-22 CN CN201010101400A patent/CN101767966A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102390967A (en) * | 2011-08-11 | 2012-03-28 | 中铁八局集团第四工程有限公司 | Self-compacting concrete for rapid transit railway III-type plate ballastless tracks and preparation method of self-compacting concrete |
| CN102432242A (en) * | 2011-10-08 | 2012-05-02 | 中铁十二局集团有限公司 | Self-compacting concrete for high-speed railway turnout area slab ballastless track filling layer |
| CN102491687A (en) * | 2011-11-11 | 2012-06-13 | 中国铁道科学研究院金属及化学研究所 | Self-compaction concrete used for filling closed space as well as preparation method and application of same |
| CN102617082A (en) * | 2012-04-09 | 2012-08-01 | 中铁七局集团郑州工程有限公司 | Concrete for railway switch base filling layer and pouring method |
| CN102617082B (en) * | 2012-04-09 | 2013-12-04 | 中铁七局集团郑州工程有限公司 | Pouring method of concrete for railway switch base filling layer |
| CN103979874A (en) * | 2014-05-15 | 2014-08-13 | 中铁五局（集团）有限公司 | Self-compacting concrete and production process quality control method thereof |
| CN104961404A (en) * | 2015-06-10 | 2015-10-07 | 上海城建物资有限公司 | Super-long-workability steel arch self-compacting concrete |
| CN110818342A (en) * | 2018-08-08 | 2020-02-21 | 四川迈铁龙科技有限公司 | Self-compacting concrete for ground iron plate type ballastless track |
| CN114477862A (en) * | 2020-10-27 | 2022-05-13 | 成都岷江混凝土有限公司 | Production method of high-crack-resistance concrete |
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Application publication date: 20100707 |