CN103613304A - Special durable early-strength admixture for high-speed railway ballastless track double-block sleeper - Google Patents
Special durable early-strength admixture for high-speed railway ballastless track double-block sleeper Download PDFInfo
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- CN103613304A CN103613304A CN201310585865.4A CN201310585865A CN103613304A CN 103613304 A CN103613304 A CN 103613304A CN 201310585865 A CN201310585865 A CN 201310585865A CN 103613304 A CN103613304 A CN 103613304A
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Abstract
The invention belongs to the field of building materials, and particularly relates to a special durable early-strength admixture for a high-speed railway ballastless track double-block sleeper, which is prepared from the following components in percentage by weight: 45-65% of early-strength admixture, 15-25% of corrosion inhibitor, 2-10% of water reducer, 4-10% of air entraining agent, 7-10% of fiber and 1-5% of dispersant. When being used for manufacturing the ballastless track double-block sleeper, the durable early-strength admixture can improve the workability of the sleeper concrete, does not have any corrosion effect on the concrete and steel bars, enhances the stripping strength and later strength of the sleeper concrete, obviously improves the impact resistance and durability of the sleeper concrete, and prolongs the service life of the sleeper concrete.
Description
Technical field
The present invention relates to the special-purpose durable early-strength type admixture of a kind of ballastless track of high-speed railway double-block type sleeper, be applicable to early strong, high-durability sleeper concrete admixture of preparation, belong to building material field.
Background technology
Along with Heavy-Haul Railway, requirement at a high speed improve day by day, rail track also has the tiny fragments of stone, coal, etc. to changing without the tiny fragments of stone, coal, etc. from existing, thereby also just more and more without the demand of tiny fragments of stone, coal, etc. sleeper.Sleeper is the important load parts of railway rail system.Due to the outdoor military service of most of sleeper and bear positive and negative biaxial bending, thereby it is also the most destroyed member in railway concrete structure.Phase actual service life of China railways sleeper is generally 20 ~ 30 years, even have less than 10 years.Railway Investment is huge, for bringing into play to greatest extent the economic benefit of railway equipment, need to improve significantly the work-ing life of concrete performance, especially sleeper concrete.Therefore need a kind of early-strength type admixture of research and development, under the prerequisite not reducing in the mechanical property that can guarantee sleeper concrete, improve its weather resistance, significantly improve concrete sleeper quality, increase the service life.
The domestic high early-strength type admixture of concrete and the durable concrete mineral admixture of there has been proposed.Chinese patent CN103030317A discloses a kind of weather resistance anti-erosion type concrete mineral admixture, main raw is the industrial dust in Metal Production, particle median size is 0.1 ~ 0.2 μ m, be characterized in significantly improving concrete resistance to fouling, optimize concrete pore structure, reduced penetrating passage, stopped the intrusion of etching medium, but it can not improve early age strength of concrete.Chinese patent CN102329096A discloses a kind of high morning of strong mineral additive, its main component is that breeze, flyash, silicon ash, sodium sulfate, polycarboxylate water-reducer mix, the concrete early activity made with this high early strong mineral additive is high, later strength development is good, water requirement is little, but on not impact of the raising of concrete durability.The present invention, by components such as hardening accelerator, rust inhibitor, air entrapment agent, dispersion agent, water reducer, fibers, can strengthen the early strength of non-fragment orbit sleeper concrete, also can improve its endurance quality.
Double-block type sleeper concrete belongs to low water binder ratio dry high-strength concrete, and in every cube of concrete, the consumption of gelling material is large.In order to improve early strength and the weather resistance of sleeper concrete; the mineral dusts such as Chang Huiyong breeze and silicon ash are as adulterant; utilize volcanic ash effect, filling role, plasticization effect, the raising weather resistance effect of adulterant to improve concrete performance; but silicon ash can make to affect concrete serviceability; increase concrete water requirement; the activity index of breeze is low, can make concrete occur the situation that demoulding strength is lower, and later strength is also difficult to reach standard.Therefore, in being mixed with the sleeper concrete of the adulterants such as breeze or silicon ash, develop a kind of durable early-strength type admixture, guarantee that concrete has stable workability, greatly improve its early strength, improve the activity of adulterant, strengthen concrete quality stability, it is very meaningful and value improving concrete durability.
Summary of the invention
The object of this invention is to provide and a kind ofly can improve sleeper concrete early strength, and can improve the durable early-strength type admixture of sleeper concrete shock resistance, antiacid alkali salt erosion performance, Anti-Chloride Ion Penetration, freezing and thawing performance.
Technical scheme of the present invention is: durable early-strength type admixture for a kind of ballastless track of high-speed railway double-block type sleeper, is characterized in that: its raw material composition and ratio is by weight: hardening accelerator 45 ~ 65%, rust inhibitor 15 ~ 25%, water reducer 2 ~ 10%, air entrapment agent 4 ~ 10%, fiber 7 ~ 10%, dispersion agent 1 ~ 5%.
Press such scheme, described hardening accelerator is calcium formiate and sodium sulfate, and its ratio is about 3:1.
Press such scheme, described rust inhibitor is calcium nitrite and Sodium Nitrite, and its ratio is about 1:1.
Press such scheme, described water reducer is polycarboxylic acid series high efficiency water reducing agent.
Press such scheme, described air entrapment agent is saponin class non-ionic type air entrapment agent.
Press such scheme, described fiber is inorganic hydrophilic mineral fibre.
Press such scheme, described dispersion agent is polyacrylamide.
During use, the durable early-strength type admixture that the present invention is prepared adds in sleeper concrete in 10% the ratio that joins adulterant in sleeper concrete, and cement, adulterant drop in concrete mixer simultaneously and stir by normal concrete stirring technology.
The invention has the advantages that: (1) adopts air entrapment agent, increased small in concrete and bubble number independently, these bubbles can always play lubrication at concrete, improve greatly concrete workability, the increase of concrete 's air-containing, is also conducive to concrete freezing and thawing performance.(2) premix water reducer in durable early-strength type admixture, has improved the serviceability of sleeper concrete; (3) adopt hardening accelerator improve the 1d activity index of adulterant in sleeper concrete and ensure that sleeper concrete has higher early strength, and later strength sustainable growth; (4) adopt rust inhibitor, prevent that the steel bar girder in sleeper from producing corrosion, improved reinforcing bar and concrete interfacial property, improved interfacial adhesion, improved the service life of sleeper; (5) introduce the hydrophilic fibre that length is 5mm ~ 6.2mm, this hydrophilic fibre has good dispersive ability, and with concrete have good consistency and, to the existing construction technology of sleeper concrete without particular requirement, easy construction, workability is high, steady quality.Use this kind of hydrophilic fibre, can reduce the phenomenon such as bleeding, segregation of sleeper concrete.In addition, fiber is uniform three dimensional random distribution in concrete, played certain skeleton function, and produce frictional force and mechanical snap power with concrete, improved concrete force of cohesion, thereby improved concrete anti-cracking performance, and concrete and rebar cohesive strength and surging force have greatly been improved.(6) adopt dispersion agent, can when stir, fiber be more evenly distributed in concrete, and hardening accelerator is spread out more uniformly, make the quality of sleeper concrete more stable.
Embodiment
Below in conjunction with specific examples, the present invention will be further described.
Embodiment 1:
Take each raw material: hardening accelerator 6.5kg, water reducer 0.7kg, cause agent 0.4kg, rust inhibitor 1.4kg, fiber 0.9kg, dispersion agent 0.1kg.The compositions such as hardening accelerator, water reducer, air entrapment agent, rust inhibitor, fiber are dropped into stirrer for mixing 5 minutes, then dispersion agent is dropped in stirrer and continues to mix 5 minutes, be packaged into bag.
Described hardening accelerator is the chemically pure reagent of calcium formiate and sodium sulfate, and proportion is 3:1; Described rust inhibitor is the chemically pure reagent of calcium nitrite and Sodium Nitrite, and proportion is 1:1; Described water reducer is the 2651F powdery polycarboxylic acid based water reducer that BASF China produces; Described air entrapment agent is saponin class Compositional type nonionic surface active agent; Described fiber is the rice mineral fibre difficult to understand of Jiangsu meter Jian Cai difficult to understand Science and Technology Ltd., and main component is silicate, and length is 5mm ~ 6.2mm; Described dispersion agent is polyacrylamide chemically pure reagent.
During use, the weather resistance early-strength type admixture that the present invention is prepared adds the cement in sleeper concrete in the ratio of adulterant 10%, and cement drops in concrete mixer by normal concrete stirring technology stirring simultaneously.
Embodiment 2:
Take each raw material: hardening accelerator 6.0kg, water reducer 0.6kg, cause agent 0.5kg, rust inhibitor 1.9kg, fiber 0.8kg, dispersion agent 0.2kg.The compositions such as hardening accelerator, water reducer, air entrapment agent, rust inhibitor, fiber are dropped into stirrer for mixing 5 minutes, then dispersion agent is dropped in stirrer and continues to mix 5 minutes, be packaged into bag.
Described hardening accelerator is the chemically pure reagent of calcium formiate and sodium sulfate, and proportion is 3:1; Described rust inhibitor is the chemically pure reagent of calcium nitrite and Sodium Nitrite, and proportion is 1:1; Described water reducer is the 2651F powdery polycarboxylic acid based water reducer that BASF China produces; Described air entrapment agent is saponin class Compositional type nonionic surface active agent; Described fiber is the rice mineral fibre difficult to understand of Jiangsu meter Jian Cai difficult to understand Science and Technology Ltd., and main component is silicate, and length is 5mm ~ 6.2mm; Described dispersion agent is polyacrylamide chemically pure reagent.
During use, the weather resistance early-strength type admixture that the present invention is prepared adds the cement in sleeper concrete in the ratio of adulterant 10%, and cement drops in concrete mixer by normal concrete stirring technology stirring simultaneously.
Embodiment 3:
Take each raw material: hardening accelerator 5.5kg, water reducer 0.5kg, cause agent 0.6kg, rust inhibitor 2.4kg, fiber 0.7kg, dispersion agent 0.3kg.Hardening accelerator, water reducer, air entrapment agent, resistance are embroidered to the compositions such as agent, fiber and drop into stirrer for mixing 5 minutes, then dispersion agent is dropped in stirrer and continues to mix 5 minutes, be packaged into bag.
Described hardening accelerator is the chemically pure reagent of calcium formiate and sodium sulfate, and proportion is 3:1; Described rust inhibitor is the chemically pure reagent of calcium nitrite and Sodium Nitrite, and proportion is 1:1; Described water reducer is the 2651F powdery polycarboxylic acid based water reducer that BASF China produces; Described air entrapment agent is saponin class Compositional type nonionic surface active agent; Described fiber is the rice mineral fibre difficult to understand of Jiangsu meter Jian Cai difficult to understand Science and Technology Ltd., and main component is silicate, and length is 5mm ~ 6.2mm; Described dispersion agent is polyacrylamide chemically pure reagent.
During use, the weather resistance early-strength type admixture that the present invention is prepared adds the cement in sleeper concrete in the ratio of adulterant 10%, and cement drops in concrete mixer by normal concrete stirring technology stirring simultaneously.
Embodiment 4:
Take each raw material: hardening accelerator 5.0kg, water reducer 0.4kg, cause agent 0.7kg, rust inhibitor 2.5kg, fiber 1.0kg, dispersion agent 0.4kg.Hardening accelerator, water reducer, air entrapment agent, resistance are embroidered to the compositions such as agent, fiber and drop into stirrer for mixing 5 minutes, then dispersion agent is dropped in stirrer and continues to mix 5 minutes, be packaged into bag.
Described hardening accelerator is the chemically pure reagent of calcium formiate and sodium sulfate, and proportion is 3:1; Described rust inhibitor is the chemically pure reagent of calcium nitrite and Sodium Nitrite, and proportion is 1:1; Described water reducer is the 2651F powdery polycarboxylic acid based water reducer that BASF China produces; Described air entrapment agent is saponin class Compositional type nonionic surface active agent; Described fiber is the rice mineral fibre difficult to understand of Jiangsu meter Jian Cai difficult to understand Science and Technology Ltd., and main component is silicate, and length is 5mm ~ 6.2mm; Described dispersion agent is polyacrylamide chemically pure reagent.
During use, the weather resistance early-strength type admixture that the present invention is prepared adds the cement in sleeper concrete in the ratio of adulterant 10%, and cement drops in concrete mixer by normal concrete stirring technology stirring simultaneously.
Embodiment 5:
Take each raw material: hardening accelerator 4.6kg, water reducer 0.4kg, cause agent 1.0 kg, rust inhibitor 2.5kg, fiber 1.0kg, dispersion agent 0.5kg.Hardening accelerator, water reducer, air entrapment agent, resistance are embroidered to the compositions such as agent, fiber and drop into stirrer for mixing 5 minutes, then dispersion agent is dropped in stirrer and continues to mix 5 minutes, be packaged into bag.
Described hardening accelerator is the chemically pure reagent of calcium formiate and sodium sulfate, and proportion is 3:1; Described rust inhibitor is the chemically pure reagent of calcium nitrite and Sodium Nitrite, and proportion is 1:1; Described water reducer is the 2651F powdery polycarboxylic acid based water reducer that BASF China produces; Described air entrapment agent is saponin class Compositional type nonionic surface active agent; Described fiber is the rice mineral fibre difficult to understand of Jiangsu meter Jian Cai difficult to understand Science and Technology Ltd., and main component is silicate, and length is 5mm ~ 6.2mm; Described dispersion agent is polyacrylamide chemically pure reagent.
During use, the weather resistance early-strength type admixture that the present invention is prepared adds the cement in sleeper concrete in the ratio of adulterant 10%, and cement drops in concrete mixer by normal concrete stirring technology stirring simultaneously.
The effect of each embodiment product in sleeper concrete gathers as following table, and the proportioning of sleeper concrete is (kg/m
3): blank sample: PO42.5 cement 432; Medium sand 657; Rubble 1119; Water reducer 5.76; Water 134.4; Super finely ground slag 28.8; Silicon ash 19.2.Embodiment 1 ~ 5:PO42.5 cement 432; Super finely ground slag 28.8; Silicon ash 19.2; Medium sand 657; Rubble 1119; Water reducer 5.76; Water 134.4; Durable early-strength type admixture 4.8.Ultrafine slag powder is that specific surface area is 500 ~ 600m
2the breeze of/kg; Described high reactivity silicon ash is greater than 25000 m for specific surface area
2the SILICA FUME that/kg, silicone content are greater than 95%.
Embodiment 1 ~ 5 performance testing standard is according to the provisional technical qualification of [2008] No. 74-passenger dedicated railway line CRTSI of scientific and technological base plate-type non-fragment orbit concrete railway board.
Claims (7)
1. the special-purpose durable early-strength type admixture of ballastless track of high-speed railway double-block type sleeper, is characterized in that: its raw material composition and ratio is by weight: hardening accelerator 45 ~ 65%, rust inhibitor 15 ~ 25%, water reducer 2 ~ 10%, air entrapment agent 4 ~ 10%, fiber 7 ~ 10%, dispersion agent 1 ~ 5%.
2. the special-purpose durable early-strength type admixture of ballastless track of high-speed railway double-block type sleeper according to claim 1, it is characterized in that: described hardening accelerator is the mixture of calcium formiate and sodium sulfate, two kinds of reagent are technical grade product, and active constituent content is more than 85%, and weight ratio is 3:1.
3. the special-purpose durable early-strength type admixture of ballastless track of high-speed railway double-block type sleeper according to claim 1, it is characterized in that: described rust inhibitor is the mixture of calcium nitrite and Sodium Nitrite, two kinds of reagent are technical grade product, and active constituent content is more than 85%, and weight ratio is 1:1.
4. the special-purpose durable early-strength type admixture of ballastless track of high-speed railway double-block type sleeper according to claim 1, is characterized in that: described water reducer is Powdered polycarboxylate water-reducer.
5. the special-purpose durable early-strength type admixture of ballastless track of high-speed railway double-block type sleeper according to claim 1, is characterized in that: described air entrapment agent is saponin class Compositional type nonionic surface active agent, and outward appearance is pale yellow powder.
6. the special-purpose durable early-strength type admixture of ballastless track of high-speed railway double-block type sleeper according to claim 1, is characterized in that: described fiber is mineral hydrophilic fibre, and length is 5 ~ 6.2mm.
7. the special-purpose durable early-strength type of ballastless track of high-speed railway double-block type sleeper according to claim 1, is characterized in that: described dispersion agent is polyacrylamide, and reagent is technical grade product, and active constituent content is more than 85%.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556775A (en) * | 2015-02-09 | 2015-04-29 | 孙宁 | Concrete additive |
| CN107382133A (en) * | 2017-08-10 | 2017-11-24 | 温州市环美建筑工程有限公司 | Concrete early strength agent and preparation method thereof |
| CN107529527A (en) * | 2017-08-16 | 2018-01-02 | 北京海绵环境科技有限公司 | A kind of powdered pervious concrete reinforcing agent and preparation method thereof |
| CN109680599A (en) * | 2017-07-02 | 2019-04-26 | 陈佑生 | A kind of bridge pinner |
| CN110156360A (en) * | 2019-06-05 | 2019-08-23 | 滁州市炬基节能新型建材有限公司 | A kind of mutual ingredients of regenerated resources concrete and preparation method thereof |
| CN111875280A (en) * | 2020-08-13 | 2020-11-03 | 衡阳市九州建材有限公司 | Modified composite concrete early strength agent |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1377849A (en) * | 2002-05-27 | 2002-11-06 | 杨普安 | Railway sleeper and its preparing method |
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- 2013-11-20 CN CN201310585865.4A patent/CN103613304B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1377849A (en) * | 2002-05-27 | 2002-11-06 | 杨普安 | Railway sleeper and its preparing method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556775A (en) * | 2015-02-09 | 2015-04-29 | 孙宁 | Concrete additive |
| CN109680599A (en) * | 2017-07-02 | 2019-04-26 | 陈佑生 | A kind of bridge pinner |
| CN107382133A (en) * | 2017-08-10 | 2017-11-24 | 温州市环美建筑工程有限公司 | Concrete early strength agent and preparation method thereof |
| CN107529527A (en) * | 2017-08-16 | 2018-01-02 | 北京海绵环境科技有限公司 | A kind of powdered pervious concrete reinforcing agent and preparation method thereof |
| CN110156360A (en) * | 2019-06-05 | 2019-08-23 | 滁州市炬基节能新型建材有限公司 | A kind of mutual ingredients of regenerated resources concrete and preparation method thereof |
| CN111875280A (en) * | 2020-08-13 | 2020-11-03 | 衡阳市九州建材有限公司 | Modified composite concrete early strength agent |
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