CN102010163A - CA (cement and asphalt) mortar for CRTS II slab ballastless tracks - Google Patents
CA (cement and asphalt) mortar for CRTS II slab ballastless tracks Download PDFInfo
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- CN102010163A CN102010163A CN 201010543916 CN201010543916A CN102010163A CN 102010163 A CN102010163 A CN 102010163A CN 201010543916 CN201010543916 CN 201010543916 CN 201010543916 A CN201010543916 A CN 201010543916A CN 102010163 A CN102010163 A CN 102010163A
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- mortar
- cement
- reducer
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- emulsified bitumen
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Abstract
The invention provides CA (cement and asphalt) mortar for CRTS II slab ballastless tracks, aiming to ensure the CA mortar to have better working performance and compression and breaking strength. The invention is characterized in that the polycarboxylic acid water reducer with water reduction quantity toward CA mortar cement being 0.13-0.22% is mixed in emulsified asphalt in the emulsifying process and the melamine water reducer with water reduction quantity toward CA mortar cement being 0.21-0.22% is admixed in the process of blending the emulsified asphalt and mortar. The invention has the following beneficial effects: the dispersion degree and fluidity of the mortar have lower losses; the CA mortar has good working performance; and the compression and breaking strength of the CA mortar are effectively improved.
Description
Technical field
A kind of CRTS of being used for II of the present invention template formula non-fragment orbit CA mortar.
Background technology
Along with the fast development of our high-speed railway, because plate-type slag-free orbit possesses advantages such as good stability, weather resistance is strong, rigidity is even, maintenance capacity is few, it will be widely applied in high ferro, subway, subway engineering.Therefore the necessary CA mortar of plate-type slag-free orbit market outlook are boundless.
The CA mortar be exactly when slab track is constructed in rigid track and concrete road bed intermediate space dabbling emulsification asphalt cement mortar, with form homogeneous and possess rigidity and elastic filling bed course, this CA screed adjustable rail geometric accuracy and absorb the dual function of vibratory impulse energy.The CA mortar is made up of cement, emulsified bitumen, sand and multiple additives, is organic-inorganic thing and compound material that the glued sclerosis of cement and emulsified bitumen acting in conjunction forms.
The CA mortar utilizes emulsified bitumen to improve the workability of the flowing property of mortar with the assurance mortar as liquid agent, makes its narrow zone unrestricted flow between track plate and base successfully when perfusion, evenly is filled in densely between track plate and the base.When mortar was fixed, emulsified bitumen dehydration breakdown of emulsion was reduced to pitch, is present in the mortar as a kind of elastic granule, made the CA mortar become a kind of elastic mortar.Between track board concrete, seat concrete and the CA mortar because the starting material that use are different, the water consumption difference, the length of time, construction technology etc. are all inequality, and its intensity, expansion (contraction) rate, performance such as creep also differ widely, between three kinds of materials, the CA mortar strength is minimum.In the non-fragment orbit use, along with the variation of temperature, the volume of track plate, base, CA mortar also changes, and the stress that three's volume change difference produces easily makes diseases such as the CA mortar cracks that the CA mortar is reduced work-ing life.Because pitch is viscoelastic materials, after stressed, intermolecular distortion connects the influence elongation because the phase embedding of chain twines, and stressed removal can also recover later, thereby can reduce the generation of diseases such as crackle to a certain extent.The CA mortar of CRTS II template formula non-fragment orbit is compared with the I template, also will hold vertical and horizontal position-limiting action except the effect that will bear vertical spacing, and its load is bigger comparatively speaking.Because to use the time at home shorter for CRTS II template formula non-fragment orbit, also not very abundant to the correlative study of its prescription and influence factor.
Summary of the invention
Technical problem to be solved by this invention provides a kind of CRTS II template formula non-fragment orbit CA mortar, has better serviceability and pressure-proof and snap-resistent intensity.
The technical solution adopted for the present invention to solve the technical problems is: CRTS II template formula non-fragment orbit CA mortar of the present invention, form by emulsified bitumen mix mortar, it is characterized in that: described emulsified bitumen in emulsion process in admixture go into that the folding of CA mortar cement is measured admittedly is 0.13～0.22% polycarboxylate water-reducer, go at emulsified bitumen, mortar mix ground process China and foreign countries admixture that the folding of CA mortar cement is measured admittedly is 0.21～0.22% Melamine water reducer.
The invention has the beneficial effects as follows that the divergence of mortar and degree of mobilization loss are less, the CA mortar has good working performance; The ultimate compression strength and the folding strength of CA mortar have effectively been improved.
Embodiment
The present invention is further described below in conjunction with embodiment.
CRTS II template formula non-fragment orbit CA mortar of the present invention, form by emulsified bitumen mix mortar, it is characterized in that: described emulsified bitumen in emulsion process in admixture go into that the folding of CA mortar cement is measured admittedly is 0.13～0.22% polycarboxylate water-reducer, go at emulsified bitumen, mortar mix ground process China and foreign countries admixture that the folding of CA mortar cement is measured admittedly is 0.21～0.22% Melamine water reducer.
In mix the influence of polycarboxylate water-reducer to the CA mortar performance, table 1 is the emulsified bitumen mix mortar test-results of mixing the polycarboxylate water-reducer preparation in adopting.
Mix the influence of polycarboxylate water-reducer in the table 1 to the CA mortar performance
Annotate: (1) divergence when D5 expresses machine, t280 (5) when expressing machine divergence reach the required time of 280mm; (2) D30 expresses the divergence of machine in the time of 30 minutes, t280 (30) express machine in the time of 30 minutes divergence reach the required time of 280mm.
As can be known from the above table, mix in the emulsified bitumen to surpass and the folding of emulsified bitumen is measured 0.4% polycarboxylate water-reducer admittedly can effectively prevent the emulsified bitumen breakdown of emulsion; Mix in the emulsified bitumen and the folding of emulsified bitumen measured admittedly 0.8% polycarboxylate water-reducer (it is 0.2% that its folding to CA mortar cement is measured admittedly), the divergence of mortar and degree of mobilization loss are less, and the CA mortar has serviceability preferably; Mix in 0.3%～0.8% the scope that the folding of emulsified bitumen measured admittedly interior, increase along with the water reducer volume, water consumption steadily descends, but its volume was greater than 0.4% o'clock, mortar 1d intensity slightly descends, major cause is that this high efficiency water reducing agent volume increases, and delayed coagulation influences the final setting time of CA mortar, thereby more unfavorable to the development of CA mortar 1d intensity; The result of table 1 can find out that also all 1d ultimate compression strength indexs all do not reach the standard-required of 2Mpa, thereby still needs and take certain additional measure, as mix outward add hardening accelerator or consistency preferably other high efficiency water reducing agent with performance synergy each other.
With the interior emulsified bitumen of the folding of emulsified bitumen being measured admittedly the preparation of 0.8% polycarboxylate water-reducer of mixing, to prepare the test-results of CA mortar as shown in table 2 in conjunction with mixing the Melamine water reducer outward.
The CA mortar test-results of table 2 prioritization scheme
Annotate: (1) D
5Divergence when expressing machine, t
280 (5)Divergence reaches the required time of 280mm when expressing machine; (2) D
30Express the divergence of machine in the time of 30 minutes, t2
80 (30)The machine of expressing in the time of 30 minutes divergence reach the required time of 280mm.
As shown in Table 2, replenish the outer serviceability that the Melamine water reducer can significantly improve the CA mortar of mixing, the mortar degree of mobilization through the time loss little; At volume about 3%, indexs such as water consumption and intensity change little, and this is highly beneficial to the operability in the actual engineering; When volume surpassed 5%, excreting water phenomenon can appear in mortar; In mix the emulsified bitumen of the folding of emulsified bitumen being measured admittedly the preparation of 0.8% polycarboxylate water-reducer, CA mortar 1d ultimate compression strength and the 1d folding strength of mixing 3% Melamine water reducer (it is 0.73% that its folding to CA mortar cement is measured admittedly) outward significantly improve.
Embodiment 1:
Emulsified bitumen preparation: get the raw materials ready by weight, 1.8 parts of emulsifying agents, 0.3 part of suspension agent, 0.3 part of stablizer, 0.6 part of polycarboxylate water-reducer added in 39 parts 65 ℃ the water, add jointly in the mulser with 58.0 parts of No. 70 matrix pitches that are warmed to 125 ℃, promptly obtain emulsified bitumen through emulsification pretreatment.The solid amount of polycarboxylate water-reducer folding is 0.29% in the emulsified bitumen.Its performance index such as table 3:
Table 3 emulsified bitumen performance index
Cement asphalt mortar preparation: by weight, 8.72 parts of water, 1.28 parts of P emulsions, 11.54 parts of emulsified bitumens, 0.77 part of Melamine water reducer, 0.2 part of defoamer are added in the stirrer, the speed of changeing with per minute 30 stirred 30 seconds, improved rotating speed and continued stirring and promptly made cement asphalt mortar in 180 seconds to adding 25.65 parts of cement, 51.33 parts of sand, 0.51 part of swelling agent, micro-aluminium powder (about 0.002 part) after per minute 120 changes successively.To measure admittedly with respect to the folding of cement be 0.13% to polycarboxylate water-reducer in the mortar, and it is 0.21% that the Melamine water reducer is measured admittedly with respect to the folding of cement.Its performance index such as table 4:
The performance index of table 4 cement asphalt mortar
Service condition: mortar is poured into 0.6m*0.8m indoor, in the height 50mm container, the mortar good fluidity, take off plate after the curing and observe, the mortar surfacing, with combine between plate closely connected, section is observed: sand grains is evenly distributed, bad phenomenon such as no sedimentation, layering, bubble is small evenly, and above phenomenon explanation mortar working feelings can be good.
Embodiment 2:
Emulsified bitumen preparation: get the raw materials ready by weight, 1.8 parts of emulsifying agents, 0.3 part of suspension agent, 0.3 part of stablizer, 0.8 part of polycarboxylate water-reducer added in 39 parts 65 ℃ the water, add jointly in the mulser with 57.8 parts of No. 70 matrix pitches that are warmed to 125 ℃, promptly obtain emulsified bitumen through emulsification pretreatment.The solid amount of polycarboxylate water-reducer folding is 0.38% its performance index such as table 5 in the emulsified bitumen:
Table 5 emulsified bitumen performance index
Cement asphalt mortar preparation: by weight, 7.78 parts of water, 1.30 parts of P emulsions, 11.66 parts of emulsified bitumens, 0.78 part of Melamine water reducer, 0.21 part of defoamer are added in the stirrer, the speed of changeing with per minute 30 stirred 30 seconds, improved rotating speed and continued stirring and promptly made cement asphalt mortar in 180 seconds to adding 25.92 parts of cement, 51.83 parts of sand, 0.52 part of swelling agent, micro-aluminium powder (about 0.002 part) after per minute 120 changes successively.To measure admittedly with respect to the folding of cement be 0.17% to polycarboxylate water-reducer in the mortar, and it is 0.22% that the Melamine water reducer is measured admittedly with respect to the folding of cement.Its performance index such as table 6:
The performance index of table 6 cement asphalt mortar
Service condition: mortar is poured into 0.6m*0.8m indoor, in the height 50mm container, the mortar good fluidity, take off plate after the curing and observe, the mortar surfacing, with combine between plate closely connected, section is observed: sand grains is evenly distributed, bad phenomenon such as no sedimentation, layering, bubble is small evenly, and above phenomenon explanation mortar working feelings can be good.
Embodiment 3:
Emulsified bitumen preparation: get the raw materials ready by weight, 1.8 parts of emulsifying agents, 0.3 part of suspension agent, 0.3 part of stablizer, 1.0 parts of polycarboxylate water-reducers added in 39 parts 65 ℃ the water, add jointly in the mulser with 57.6 parts of No. 70 matrix pitches that are warmed to 125 ℃, promptly obtain emulsified bitumen through emulsification pretreatment.The solid amount of polycarboxylate water-reducer folding is 0.48% in the emulsified bitumen.Its performance index such as table 7:
Table 7 emulsified bitumen performance index
Cement asphalt mortar preparation: by weight, 7.54 parts of water, 1.30 parts of P emulsions, 11.69 parts of emulsified bitumens, 0.78 part of Melamine water reducer, 0.21 part of defoamer are added in the stirrer, the speed of changeing with per minute 30 stirred 30 seconds, improved rotating speed and continued stirring and promptly made cement asphalt mortar in 180 seconds to adding 25.99 parts of cement, 51.97 parts of sand, 0.52 part of swelling agent, micro-aluminium powder (about 0.002 part) after per minute 120 changes successively.To measure admittedly with respect to the folding of cement be 0.22% to polycarboxylate water-reducer in the mortar, and it is 0.22% that the Melamine water reducer is measured admittedly with respect to the folding of cement.Its performance index such as table 8:
The performance index of table 8 cement asphalt mortar
Service condition: mortar is poured into 0.6m*0.8m indoor, in the height 50mm container, the mortar good fluidity, take off plate after the curing and observe, the mortar surfacing, with combine between plate closely connected, section is observed: sand grains is evenly distributed, bad phenomenon such as no sedimentation, layering, bubble is small evenly, and above phenomenon explanation mortar working feelings can be good.
In this manual, the solid amount of folding is meant the weight ratio of water reducer and cement or water reducer and emulsified bitumen.Usually water reducer is an aqua, wherein contains effective water reducer composition and water, is 47.7% as the solid content of the polycarboxylate water-reducer that uses.In embodiment 1, the water reducer consumption is 0.6%, and the solid amount of folding should be 0.6 * 47.7%, and when the preparation mortar, with 11.69 parts of emulsified bitumens and 25.99 parts of cement, the ratio at water reducer and cement is 0.6 * 47.7% * 11.69/25.99 so.
Embodiment 1 compares with embodiment 2, and water consumption is slightly high, and the mortar divergence loss of mixing system is bigger, and construction at high temperature might cause the work feelings can be poor.Embodiment 3 compares with embodiment 2, and the mortar resolution slightly improves.
Claims (1)
1.CRTS II template formula non-fragment orbit CA mortar, form by emulsified bitumen mix mortar, it is characterized in that: described emulsified bitumen in emulsion process in admixture go into that the folding of CA mortar cement is measured admittedly is 0.13～0.22% polycarboxylate water-reducer, go at emulsified bitumen, mortar mix ground process China and foreign countries admixture that the folding of CA mortar cement is measured admittedly is 0.21～0.22% Melamine water reducer.
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| CN 201010543916 CN102010163A (en) | 2010-10-25 | 2010-11-15 | CA (cement and asphalt) mortar for CRTS II slab ballastless tracks |
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| CN201010518036.0 | 2010-10-25 | ||
| CN201010518036 | 2010-10-25 | ||
| CN 201010543916 CN102010163A (en) | 2010-10-25 | 2010-11-15 | CA (cement and asphalt) mortar for CRTS II slab ballastless tracks |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288630A (en) * | 2011-05-12 | 2011-12-21 | 江苏博特新材料有限公司 | Method for testing and detecting temperature endurance performance of CA (cement asphalt) mortar mixture for plate type ballastless track |
| CN103059583A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Emulsified asphalt and preparation method thereof |
| CN103058589A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Cement asphalt mortar and preparation method thereof |
| CN103058588A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Anti-freezing cement asphalt mortar and preparation method thereof |
| CN103059581A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Anti-freezing emulsified asphalt and preparation method thereof |
| CN103804930A (en) * | 2012-11-07 | 2014-05-21 | 中国石油化工股份有限公司 | Modified emulsified asphalt and preparation method thereof |
| CN103803893A (en) * | 2012-11-07 | 2014-05-21 | 中国石油化工股份有限公司 | Cement asphalt mortar and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288630A (en) * | 2011-05-12 | 2011-12-21 | 江苏博特新材料有限公司 | Method for testing and detecting temperature endurance performance of CA (cement asphalt) mortar mixture for plate type ballastless track |
| CN102288630B (en) * | 2011-05-12 | 2012-11-21 | 江苏博特新材料有限公司 | Method for testing and detecting temperature endurance performance of CA (cement asphalt) mortar mixture for plate type ballastless track |
| CN103059583B (en) * | 2011-10-18 | 2015-02-18 | 中国石油化工股份有限公司 | Emulsified asphalt and preparation method thereof |
| CN103058589A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Cement asphalt mortar and preparation method thereof |
| CN103058588A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Anti-freezing cement asphalt mortar and preparation method thereof |
| CN103059581A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Anti-freezing emulsified asphalt and preparation method thereof |
| CN103058589B (en) * | 2011-10-18 | 2014-10-15 | 中国石油化工股份有限公司 | Cement asphalt mortar and preparation method thereof |
| CN103059583A (en) * | 2011-10-18 | 2013-04-24 | 中国石油化工股份有限公司 | Emulsified asphalt and preparation method thereof |
| CN103058588B (en) * | 2011-10-18 | 2015-02-18 | 中国石油化工股份有限公司 | Anti-freezing cement asphalt mortar and preparation method thereof |
| CN103059581B (en) * | 2011-10-18 | 2015-05-13 | 中国石油化工股份有限公司 | Anti-freezing emulsified asphalt and preparation method thereof |
| CN103804930A (en) * | 2012-11-07 | 2014-05-21 | 中国石油化工股份有限公司 | Modified emulsified asphalt and preparation method thereof |
| CN103803893A (en) * | 2012-11-07 | 2014-05-21 | 中国石油化工股份有限公司 | Cement asphalt mortar and preparation method thereof |
| CN103803893B (en) * | 2012-11-07 | 2016-02-03 | 中国石油化工股份有限公司 | A kind of cement asphalt mortar and preparation method thereof |
| CN103804930B (en) * | 2012-11-07 | 2016-03-02 | 中国石油化工股份有限公司 | A kind of modified emulsifying asphalt and preparation method thereof |
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Application publication date: 20110413 |