CN102173646A - CA (cement and asphalt mortar) additive for CRTS I plate-type ballastless tracks and application method thereof - Google Patents
CA (cement and asphalt mortar) additive for CRTS I plate-type ballastless tracks and application method thereof Download PDFInfo
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- CN102173646A CN102173646A CN 201110068126 CN201110068126A CN102173646A CN 102173646 A CN102173646 A CN 102173646A CN 201110068126 CN201110068126 CN 201110068126 CN 201110068126 A CN201110068126 A CN 201110068126A CN 102173646 A CN102173646 A CN 102173646A
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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
- 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
- C04B40/0039—Premixtures of ingredients
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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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
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a CA (cement and asphalt mortar) additive for CRTS I plate-type ballastless tracks and an application method thereof. The additive is composed of an agent A and an agent B. The agent A comprises the following raw materials in percentage of the total weight of the additive: 0.5 to 1 percent of organosilicon defoaming agent, 0.1 to 0.5 percent of flake-like aluminum powder foaming agent, 75 to 90 percent of sulfoaluminate-based bulking agent, and 5 to 20 percent of water-reducing agent. The agent B comprises the following raw materials by percentage of the total weight of the additive: 1 to 5 percent of rosin-based air-entraining agent. Owing to optimum additive raw materials and scientific proportions, the special additive for CA provided by the invention can improve the working performance of CA and prolong the working time of CA, can prevent delamination or separation of CA and increase the early strength of CA, and can improve the freezing resistance and the durability of CA to ensure good stability of CA.
Description
Technical field
The present invention relates to a kind of admixture that in CRTS I template formula slag-free orbit CA mortar, adds, and the method for using this admixture preparation CA mortar.
Background technology
CRTS I template formula non-fragment orbit has structural integrity, good stability, and the few advantage of maintenance capacity, is optimum at present track structure form, also is the main direction of railway high speed development.The CA bedding mortar is as important component part in the CRTS-I template formula non-fragment orbit, and its major function is support, adjustment and buffering effect, and this just requires bedding mortar that good workability, lower Young's modulus and high ductibility are arranged.Influence because the mortar flowability is subjected to temperature, cooperate when whipping device and technology is multiple, mortar must be prepared at the scene, stir and operation such as cast.Except the self performance of dry-mix, emulsified bitumen, also require admixture and emulsified bitumen, dry-mix all to have excellent adaptability (as keeping the working hour more than 30 minutes at least), admixture can not make that CA is mortar laminated, bleeding etc.For satisfying the construction needs, mortar should possess enough work timings, suitable degree of mobilization, mortar after the primary solidification should have expansion to a certain degree, can be full of residing space fully, certain prestress is provided simultaneously, prevent that bolt from unloading the sinking of back concrete slab sleeper.In addition, mortar also should have construction environment adaptability preferably, to satisfy the requirement of constructing under the Various Seasonal climatope.
The technical feature of CRTS-I template formula non-fragment orbit (being called for short the I template) CA mortar and CRTS-II template formula non-fragment orbit (being called for short the II template) CA mortar has very big difference, and as shown in table 1, its proportioning and starting material require also completely different.Each component property of the two inorganic materials requires difference little, and organic materials require difference bigger.Emulsified bitumen is as the crucial composition material of CA mortar, and the good and bad directly decision of its performance is with mortar quality and construction application success or failure.The admixture quality of different sorts and performance, the different performance inconsistencies that cause emulsified bitumen of volume, to the performance of CA mortar, but as mobile workability and bleeding rate, curing back performance, endurance quality and workability important influence.Above difference has determined CA mortar additive range of application to have limitation.
Existing CRTS I template CA mortar, mainly form by cement, emulsified bitumen, mortar basic material, need in conjunction with actual envrionment conditions and bullet train effect, can be by suitably adding the admixture of small component, some or a certain performance that change and improve material are prepared.Functions such as this admixture has diminishing, adjusts time of coagulation, control rate of expansion, control air content.
The admixture kind of concrete in the market and mortar is a lot, but is not specifically designed to the additive product and the standard of preparation CRTS-I template formula non-fragment orbit CA mortar, and similar technology is not appeared in the newspapers so far yet.Existing concrete is various with admixture kind, model, and component is various, the demanding CA mortar of technical feature but great majority can't be used for.Adding quality, diverse admixture can cause the performance inconsistency of emulsified bitumen, thereby make at the CA mortar when preparing, often exist the admixture can not be simultaneously fully and the problem that adapts of cement and this two big main raw of emulsified bitumen, the mortar air content is difficult to control, has directly influenced the performance of mortar.Existing admixture also has following some problem when being applied to the CA mortar:
(1) cause the emulsified bitumen fast emulsion breaking, can't mix, moulding;
(2) phenomenons such as bleeding, bleeding, layering appearred after CA mortar mixture left standstill;
(3) CA mortar mixture air content instability, very difficult control is within the required range;
(4) CA mortar mixture degree of mobilization is little, and the working hour is too short, can't normal construction;
(5) 1 day early strength of CA mortar is not high, the requirement of be difficult to satisfy form removal, taking out track plate stay-bolt.
In addition, existing CA mortar after normally cement and various admixture being mixed, adds emulsified bitumen and water stirs jointly again when preparation.This method is difficult to make each component in the admixture to play a role, and CA mortar mixture air content instability influences construction effect.
Summary of the invention
The invention provides a kind of CRTS I template formula slag-free orbit CA mortar admixture and application method thereof, solve the CA mortar when preparation, admixture and cement and emulsified bitumen bad adaptability, CA mortar are prone to the technical problem that layering, early strength are not high, influence construction quality.
The technical solution adopted for the present invention to solve the technical problems is:
This CRTS I template formula slag-free orbit CA mortar admixture is made up of A agent and B agent, and it is as follows that the raw material of described A agent accounts for the weight percent of admixture:
Silicone antifoam agent 0.5%～1%;
Flakey aluminium powder whipping agent 0.1%～0.5%;
Sulplo-aluminate is a swelling agent 75%～90%;
Water reducer 5%～20%;
It is as follows that the raw material of described B agent accounts for the weight percent of admixture:
Rosin based air entrapment agent 1%～5%.
Described silicone antifoam agent is that employing dimethyl silicone oil, silicon-dioxide are main raw material, and it is formulated to add emulsifying agent and auxiliary agent.
The fineness of described flakey aluminium powder whipping agent is 200 mesh screen residues 100%, and density is 1.10～1.15g/m
3
Described sulplo-aluminate is that swelling agent is made up of calcium sulfoaluminate minerals, alunite and gypsum.
Described water reducer is polycarboxylic acid salt's water reducer or thionamic acid salt water reducer.
Described rosin based air entrapment agent is to be made through esterification by rosin and phenol, sulfuric acid, sodium hydroxide.
The application method of this application CRTS I template formula slag-free orbit CA mortar admixture at factory's preparing dry mortar, mixes the A agent in cement, sand and the admixture earlier and is mixed with dry-mix, and the addition of A agent is 4～6% of cement, a sand gross weight;
The dry-mix for preparing is transported to building-site, dry-mix, emulsified bitumen and water are stirred, press 0.01/10000th～0.02 B agent that adds in the admixture of dry-mix weight at last, be mixed with CA mortar mixture after stirring.
The application method of this application CRTS I template formula slag-free orbit CA mortar admixture is prepared A agent and B agent respectively, is packed in factory;
Directly prepare the CA mortar at the construction field (site), earlier cement is mixed with A agent in the admixture, the addition of A agent is 10%～15% of a cement consumption, adding emulsified bitumen, sand, water then stirs, press 0.2%～0.4% B agent that adds in the admixture of cement consumption at last, be mixed with the CA mortar after stirring.
Beneficial effect of the present invention is as follows:
The present invention is composited by the material of multiple difference in functionality, according to the difference of feeding sequence, is made up of A, B agent.Wherein the A agent is made up of defoamer, whipping agent, swelling agent and water reducer.
Defoamer: composition is chemically inert silicone based to have, and can prevent to bubble in the sand-cement slurry whipping process, have persistent press down the bubble effect, with low cost, consumption is few, applied range, advantage such as pollution-free.
Whipping agent: the flakey aluminium powder that adopts size distribution, sheet directly to be evenly distributed, can reduce surface tension of liquid, produce a large amount of even and stable foams, having that foaming is stable, a good heat resistance, advantage that consumption is few.
Swelling agent: adopting sulplo-aluminate is swelling agent, is main composition material with calcium sulfoaluminate minerals, alunite, gypsum.The expansion effect of this swelling agent is good, does not influence strength of cement.
Water reducer: belong to a kind of tensio-active agent, based on polycarboxylate or sulfamate, aqua, pulvis all can, water-reducing rate is reached more than 30%.
The rosin based air entrapment agent is adopted in the B agent: have the uniform and stable characteristics of bleed, can obviously improve the serviceability of plastic concrete, improve the endurance quality of maturing.
The present invention combines inorganic materials and organic materials, has solved the problem of admixture and inorganic materials and organic materials consistency by modification.Each main performance index of CA mortar is both coordinated mutually, again mutual restriction, influence each other.Wherein, by admixture the various performances of CA mortar are carried out modification, as bleed effect, expansion etc., make and produce mutual superposition behind each constituent materials mix of CA mortar, the effect that influences each other, thereby make CA mortar main performance index satisfy construction and design requirements.
The present invention mainly possesses following function by optimizing the admixture starting material and proposing scientific matching when being used to prepare the CA mortar:
Admixture and cement and emulsified bitumen system have good consistency, can not occur problems such as mortar laminated, bleeding, emulsified bitumen breakdown of emulsion, material homogeneity be bad after the use.
Can obviously improve admixture to the cement work performance, prolong CA mortar operable time, improve CA mortar early strength, satisfy the CA mortar required flowing property of constructing.
Can adjust the air content of CA mortar, make CA mortar pore evenly, air content is stabilized in specialized range, rate of expansion is controlled.
Can improve the frost resistance and the weather resistance of CA mortar, make the CA mortar have satisfactory stability.
This special additive adopts the solid, powdery material to make, and is convenient to transportation, preservation and site operation, suits to have good economic benefit in different territorial environment constructions, has broad application prospects in the large-scale high speed railway construction of China.
The present invention has also proposed the compound method of two kinds of CA mortars especially, composition and reinforced order that the A agent of admixture, B agent and CA mortar are added adapt, add by specific sequencing, can make A agent, B agent in the admixture bring into play its each self-applying, the CA mortar of being prepared reaches best performance.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the process flow sheet of CA mortar compound method one of the present invention.
Fig. 2 is the process flow sheet of CA mortar compound method two of the present invention.
Embodiment
Embodiment one, and this CRTS I template formula slag-free orbit CA mortar admixture is made of A agent and B agent, and it is as follows that the raw material of described A agent accounts for the weight percent of admixture:
Silicone antifoam agent 1%;
Flakey aluminium powder whipping agent 0.5%;
Sulplo-aluminate is a swelling agent 85%;
Water reducer 10%;
It is as follows that the raw material of described B agent accounts for the weight percent of admixture:
Rosin based air entrapment agent 3.5%.
Embodiment two, and this CRTS I template formula slag-free orbit CA mortar admixture is made of A agent and B agent, and it is as follows that the raw material of described A agent accounts for the weight percent of admixture:
Silicone antifoam agent 0.5%;
Flakey aluminium powder whipping agent 0.5%;
Sulplo-aluminate is a swelling agent 75%;
Water reducer 20%;
It is as follows that the raw material of described B agent accounts for the weight percent of admixture:
Rosin based air entrapment agent 4%.
Embodiment three, and this CRTS I template formula slag-free orbit CA mortar admixture is made of A agent and B agent, and it is as follows that the raw material of described A agent accounts for the weight percent of admixture:
Silicone antifoam agent 0.3%;
Flakey aluminium powder whipping agent 0.2%;
Sulplo-aluminate is a swelling agent 80%;
Water reducer 17.5%;
It is as follows that the raw material of described B agent accounts for the weight percent of admixture:
Rosin based air entrapment agent 2%.
Embodiment four, and this CRTS I template formula slag-free orbit CA mortar admixture is made of A agent and B agent, and it is as follows that the raw material of described A agent accounts for the weight percent of admixture:
Silicone antifoam agent 1%;
Flakey aluminium powder whipping agent 0.1%;
Sulplo-aluminate is a swelling agent 90%;
Water reducer 5%;
It is as follows that the raw material of described B agent accounts for the weight percent of admixture:
Rosin based air entrapment agent 3.9%.
Embodiment five, and this CRTS I template formula slag-free orbit CA mortar admixture is made of A agent and B agent, and it is as follows that the raw material of described A agent accounts for the weight percent of admixture:
Silicone antifoam agent 0.6%;
Flakey aluminium powder whipping agent 0.4%;
Sulplo-aluminate is a swelling agent 83%;
Water reducer 15%;
It is as follows that the raw material of described B agent accounts for the weight percent of admixture:
Rosin based air entrapment agent 1%.
In the foregoing description one to five, described sulplo-aluminate is that swelling agent is made up of calcium sulfoaluminate minerals, alunite and gypsum.It is main raw material that silicone antifoam agent can adopt dimethyl silicone oil, silicon-dioxide, and it is formulated to add emulsifying agent and auxiliary agent, and density is 0.99 * 103kg/m
3The fineness of flakey aluminium powder whipping agent is 200 mesh screen residues 100%, and density is 1.10～1.15g/m
3Water reducer is polycarboxylate or thionamic acid salt water reducer.The rosin based air entrapment agent is to be made through esterification by rosin and phenol, sulfuric acid, sodium hydroxide.
Referring to shown in Figure 1, application method one is at factory's preparing dry mortar, earlier with 250 kg/m
3～350 kg/m
3Cement, 550～750 kg/m
3Sand and the A agent in the admixture mix and be mixed with dry-mix, the addition of A agent is 4～6% of cement, a sand gross weight;
The dry-mix for preparing is transported to building-site, ratio in dry powder Sha Jiang ﹕ Ruization Li Qing ﹕ water=1 ﹕, 0.37～0.42 ﹕ 0.05～0.07 stirs dry-mix, emulsified bitumen and water, press 0.01/10000th～0.02 B agent that adds in the admixture of dry-mix weight at last, be mixed with CA mortar mixture after stirring.
Referring to shown in Figure 2, application method two is prepared A agent and B agent respectively, is packed in factory;
Directly prepare the CA mortar at the construction field (site), earlier cement is mixed with A agent in the admixture, cement consumption is 250 kg/m
3～350 kg/m
3, the addition of A agent is 10%～15% of a cement consumption, adds 430～460 kg/m then
3Emulsified bitumen, 550～750 kg/m
3Sand, 55～65 kg/m
3Water stir, press 0.2%～0.4% of cement consumption at last and add B agent in the admixture, be mixed with the CA mortar after stirring.
CA mortar performance test result with the present invention's preparation is as follows: 8%, 1 day intensity 0.89MPa of air content, and 28 days intensity 2.01MPa, layering, excreting water phenomenon do not take place in mixture.
Claims (8)
1. a CRTS I template formula slag-free orbit CA mortar admixture is made up of A agent and B agent, it is characterized in that: it is as follows that the raw material of described A agent accounts for the weight percent of admixture:
Silicone antifoam agent 0.5%～1%;
Flakey aluminium powder whipping agent 0.1%～0.5%;
Sulplo-aluminate is a swelling agent 75%～90%;
Water reducer 5%～20%;
It is as follows that the raw material of described B agent accounts for the weight percent of admixture:
Rosin based air entrapment agent 1%～5%.
2. CRTS I template formula slag-free orbit CA mortar admixture according to claim 1 is characterized in that: described silicone antifoam agent is that employing dimethyl silicone oil, silicon-dioxide are main raw material, and it is formulated to add emulsifying agent and auxiliary agent.
3. CRTS I template formula slag-free orbit CA mortar admixture according to claim 1, it is characterized in that: the fineness of described flakey aluminium powder whipping agent is 200 mesh screen residues 100%, and density is 1.10～1.15g/m
3
4. CRTS I template formula slag-free orbit CA mortar admixture according to claim 1, it is characterized in that: described sulplo-aluminate is that swelling agent is made up of calcium sulfoaluminate minerals, alunite and gypsum.
5. CRTS I template formula slag-free orbit CA mortar admixture according to claim 1, it is characterized in that: described water reducer is polycarboxylic acid salt's water reducer or thionamic acid salt water reducer.
6. CRTS I template formula slag-free orbit CA mortar admixture according to claim 1, it is characterized in that: described rosin based air entrapment agent is to be made through esterification by rosin and phenol, sulfuric acid, sodium hydroxide.
7. an application rights requires the application method of 1～6 any described CRTS I template formula slag-free orbit CA mortar admixture, it is characterized in that:
At factory's preparing dry mortar, the A agent in cement, sand and the admixture is mixed be mixed with dry-mix earlier, the addition of A agent is 4～6% of cement, a sand gross weight;
The dry-mix for preparing is transported to building-site, dry-mix, emulsified bitumen and water are stirred, press 0.01/10000th～0.02 B agent that adds in the admixture of dry-mix weight at last, be mixed with CA mortar mixture after stirring.
8. the application method of application rights requirement 1～6 any described CRTS I template formula slag-free orbit CA mortar admixture is characterized in that: in factory A agent and B agent are prepared respectively, packed;
Directly prepare the CA mortar at the construction field (site), earlier cement is mixed with A agent in the admixture, the addition of A agent is 10%～15% of a cement consumption, adding emulsified bitumen, sand, water then stirs, press 0.2%～0.4% B agent that adds in the admixture of cement consumption at last, be mixed with the CA mortar after stirring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110068126 CN102173646B (en) | 2011-03-22 | 2011-03-22 | CA (cement and asphalt mortar) additive for CRTS I plate-type ballastless tracks and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110068126 CN102173646B (en) | 2011-03-22 | 2011-03-22 | CA (cement and asphalt mortar) additive for CRTS I plate-type ballastless tracks and application method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553486A (en) * | 2013-10-14 | 2014-02-05 | 中国人民解放军理工大学 | Fast-hardening and high-strength micro-expansion repair mortar |
| CN104370511A (en) * | 2014-10-23 | 2015-02-25 | 广西南宁柏睿通合成建材科技有限公司 | Bridge bearing mortar and production method thereof |
| CN104386986A (en) * | 2014-10-23 | 2015-03-04 | 广西南宁柏睿通合成建材科技有限公司 | Ultra-high-strength track cement gum and prepared method thereof |
| CN104556886A (en) * | 2013-10-15 | 2015-04-29 | 中国石油化工股份有限公司 | Emulsified asphalt cement mortar for CRTS I-type slab ballastless track and preparation method thereof |
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| CN101058494A (en) * | 2006-04-23 | 2007-10-24 | 柳州欧维姆机械股份有限公司 | CA mortar dry powder for plate-type slag-free orbit |
| CN101058493A (en) * | 2006-04-23 | 2007-10-24 | 柳州欧维姆机械股份有限公司 | CA mortar for plate-type slag-free orbit and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553486A (en) * | 2013-10-14 | 2014-02-05 | 中国人民解放军理工大学 | Fast-hardening and high-strength micro-expansion repair mortar |
| CN104556886A (en) * | 2013-10-15 | 2015-04-29 | 中国石油化工股份有限公司 | Emulsified asphalt cement mortar for CRTS I-type slab ballastless track and preparation method thereof |
| CN104370511A (en) * | 2014-10-23 | 2015-02-25 | 广西南宁柏睿通合成建材科技有限公司 | Bridge bearing mortar and production method thereof |
| CN104386986A (en) * | 2014-10-23 | 2015-03-04 | 广西南宁柏睿通合成建材科技有限公司 | Ultra-high-strength track cement gum and prepared method thereof |
| CN104370511B (en) * | 2014-10-23 | 2016-08-17 | 广西南宁柏睿通合成建材科技有限公司 | Bridge pad mortar and production method thereof |
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| CN102173646B (en) | 2012-08-01 |
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