CN104556886A - Emulsified asphalt cement mortar for CRTS I-type slab ballastless track and preparation method thereof - Google Patents
Emulsified asphalt cement mortar for CRTS I-type slab ballastless track and preparation method thereof Download PDFInfo
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- CN104556886A CN104556886A CN201310480444.5A CN201310480444A CN104556886A CN 104556886 A CN104556886 A CN 104556886A CN 201310480444 A CN201310480444 A CN 201310480444A CN 104556886 A CN104556886 A CN 104556886A
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Abstract
The invention belongs to the technical field of emulsified asphalt cement mortar for high-speed railway, and particularly relates to emulsified asphalt cement mortar for a CRTS I-type slab ballastless track and a preparation method thereof. The emulsified asphalt cement mortar comprises the following raw materials in parts by mass: 380-415 parts of modified emulsified asphalt, 800-880 parts of a dry powdery material, 25-36 parts of water, 0.11-0.3 part of a defoaming agent and 0.3-2 parts of an air entraining agent. The prepared emulsified asphalt cement mortar for the CRTS I-type slab ballastless track uses the modified emulsified asphalt containing styrene-butadiene latex and resin emulsion, so that the low temperature performance of the asphalt is improved, and the fluidity, the early strength, the frost resistance and the weatherability of CA mortar are improved; compared with the prior art, the emulsified asphalt cement mortar for the CRTS I-type slab ballastless track has the characteristics of simplicity and convenience in preparation process as well as simple equipment; the service life of the ballastless track paved by the emulsified asphalt cement mortar is prolonged.
Description
Technical field
The invention belongs to high-speed railway emulsification asphalt cement mortar technical field, be specifically related to a kind of CRTSI plate-type non-fragment orbit emulsification asphalt cement mortar and preparation method thereof.
Background technology
In ballastless track of high-speed railway development course, what technology was comparatively perfect the surely belong to plate-type ballastless track of Japan and the plate-type ballastless track CRTS II type of CRTS I type and Germany, these two kinds of templates all need emulsification asphalt cement mortar and CA(cement asphalt mortar) mortar does bed course.CA mortar stirs the obtained mortar with property by the plurality of liquids such as the powders such as cement, fine aggregate, aluminium powder, compound, emulsified bitumen, water, defoamer, air entrapment agent and other admixture through special process, it is a kind of novel semi-rigid organic/inorganic composite material, both there is certain elasticity, there is again certain intensity, in non-fragment orbit, play the effect of leveling, damping, buffering and support.In structure and use properties, there is larger difference in these two kinds of templates.The gordian technique of CRTS I type is CA mortar, and the gordian technique of CRTS II type is the preparation of track plates.Japan began one's study from nineteen sixty-five, through the experimental studies of more than 30 years and examination paving, develop the CA mortar various of different nature being applicable to warm area, cold district, field patch, the price comparison of these mortars is high, also there is more restriction to the starting material preparing mortar simultaneously, need special producer and special production technique.
Systems in Certain Developed Countries is late more in the world in the development of China Railway High-speed, and after 2004, the former Ministry of Railways just first backward Japan, Germany etc. buys high ferro technology, after introduction, digestion, absorption, has carried out innovating in conjunction with China's actual conditions again.Therefore, the domestic application of the research to ballastless track of high-speed railway CA mortar is more late, the emulsification asphalt cement mortar of development and the emulsification asphalt cement mortar of import also also exist gap at aspect of performances such as air content, early strength, frost resistance, weathering resistancies, and China region is wide, north and south geology and weather condition difference too large, particularly severe cold area requires higher to CA mortar performance, even if adopt external raw material and mortar technology of preparing completely, the needs of China's geographical environment and weather also can not be met completely.
In Chinese patent CN100334032C, the preparation method of emulsification asphalt cement mortar mainly passes through the blending ratio regulating ordinary Portland cement and aluminosulfate cement, improves the early strength of the 1d of emulsification asphalt cement mortar and the stability of the rear volume that expands.Also containing cationic chloroprene latex, flyash, redispersion latex powder, lignocellulose and ether of cellulose etc. in Chinese patent CN101058493B emulsification asphalt cement mortar, composition more complicated.The emulsification asphalt cement mortar of Chinese patent CN1858016A is suitable only for warm area and uses.
Summary of the invention
The object of this invention is to provide a kind of CRTS I-type plate-type non-fragment orbit emulsification asphalt cement mortar, this emulsification asphalt cement mortar early strength is high, good fluidity, frost resistance and good weatherability, is particularly suitable for cold district; Invention also provides its preparation method.
CRTS I-type plate-type non-fragment orbit emulsification asphalt cement mortar of the present invention, is made up of the raw material of following mass fraction: modified emulsifying asphalt 380 ~ 415 parts, dry mash 800 ~ 880 parts, 25 ~ 36 parts, water, defoamer 0.11 ~ 0.3 part and air entrapment agent 0.3 ~ 2 part.
The present invention's emulsified bitumen used is modified emulsifying asphalt, and modified emulsifying asphalt properties-correcting agent used is composite modifier, and one is SBR emulsion, greatly can improve the low-temperature performance of pitch; One is resin emulsion, good with cement consistency, can improve cohesiveness and the early strength of mortar.This emulsified asphalt slurry early strength is high, frost resistance and good weatherability, is applicable to the various different geographical environmental condition of China, especially cold district, can improve non-fragment orbit work-ing life simultaneously.
Described modified emulsifying asphalt is made up of the raw material of following mass fraction: matrix pitch 58 ~ 63 parts, styrene-butadiene latex 2 ~ 10 parts, interpolymer latex of polystyrene and acrylic ester 1 ~ 8 part, compound emulsifying agent 0.5 ~ 8 part, stablizer 0.01 ~ 2 part, acid 0.1 ~ 3 part and 35 ~ 40 parts, water.
Wherein, in this modified emulsifying asphalt:
Preferred 70# or the 90# heavy traffic paving asphalt of described matrix pitch.
Described styrene-butadiene latex is the poly-type of negatively charged ion breast, and solid content is 40 ~ 60%, and styrene monomer content is 20 ~ 50wt.%, styrene-butadiene latex and bitumen compatibility good, resistance to low temperature and the frost resistance of pitch can be improved.
Described interpolymer latex of polystyrene and acrylic ester is anionic, and solid content is 40 ~ 50%.Interpolymer latex of polystyrene and acrylic ester and cement consistency good, the cohesive force of mortar, early strength, Young's modulus and frost resistance can be improved.
Described compound emulsifying agent is made up of nonionic emulsifying agent and cationic emulsifier, one in the preferred polyoxyethylene octylphenol ether of nonionic emulsifying agent, polyoxyethylene nonylphenol ether, the ethoxy radix of polyoxyethylene octylphenol ether and polyoxyethylene nonylphenol ether is 8-30, ethoxy radix only more than 8 emulsifying agent just have good water-soluble.One or more in the preferred octadecyl trimethyl ammonium chloride of cationic emulsifier, alkyl bi-quaternary ammonium salt or aminated lignin.
Described stablizer adopts organic polymer material and/or inorganic salt.Organic polymer material preferably polyethylene alcohol, Mierocrystalline cellulose or polyacrylamide, be used for improving the viscosity of aqueous phase and density, increase the resistance of bitumen particle pedesis, improve the stability of modified emulsifying asphalt system.Inorganic salt preferably calcium chloride or ammonium chloride, be used for strengthening the electrostatic double layer effect around emulsion particle, increase ζ-potential value, increase intergranular mutual repulsive force, slow down intergranular cohesion speed, improve emulsifying capacity, improve emulsion intercalation method, particularly low tempertaure storage stability, can also reduce the consumption of quaternary ammonium salt emulsifying agent.
The preferred hydrochloric acid of described acid or hexanodioic acid.Adding and can regulating pH value of acid, increases the stability of modified emulsifying asphalt system, can reduce emulsifier simultaneously.
Described dry mash is made up of the raw material of following mass fraction: cement 30 ~ 37 parts; Fine sand 63 ~ 72 parts; Swelling agent 2.8 ~ 3.2 parts and aluminium powder 0.0020 ~ 0.0030 part.
In this dry mash:
The preferred early strength silicate cement of cement, strength grade is one or both mixing in 42.5R, 52.5R.
Fine sand preferred mountain sand, river sand, maximum particle diameter is less than 2.50mm.
Swelling agent preferred calcium sulphoaluminate class swelling agent, silicate cement volume in aquation process of setting can shrink, therefore the mortar of silicate cement configuration is adopted also can to produce volumetric shrinkage in cementation solidifying process, this can cause occurring gap between track plates and concrete bed, Lack of support thus threaten the traffic safety of bullet train, therefore must add corresponding swelling agent and make volumetric expansion after mortar hardening, with the VOLUME LOSS of this compensate for shrinkage in dry mash.
The preferred flakey aluminium powder of aluminium powder, adds volume when flakey aluminium powder can make mortar hardening early stage and produces expansion.
Defoamer preferred polyoxy silane defoamer, adding of defoamer, the generation of bubble during mortar mix can be suppressed on the one hand, also the air pocket generated in mortar can be made on the other hand to break rapidly, after preventing mortar hardening, internal structure and surface form larger space, thus reduce intensity and the frost resistance of mortar.
The preferred rosin based air entrapment agent of air entrapment agent, air entrapment agent is in mortar whipping process, plays introducing and is uniformly distributed in a large number, stablizes and the effect of closed micro-bubble, can stop or suppress the generation of small ice body in grout, be conducive to the frost resistance of mortar.
In the present invention, in formula, component used is commercially available prod.
The preparation method of CRTSI plate-type non-fragment orbit emulsification asphalt cement mortar of the present invention is:
According to proportioning raw materials, modified emulsifying asphalt, water, defoamer is added successively in CA mortar stirring tank, under stirring with the speed of 50 ~ 70r/min, dry mash, air entrapment agent are added in stirring tank again, after reinforced, stir 3 ~ 5min with the speed of 120 ~ 150r/min, then stir 1 ~ 2min with the speed of 70 ~ 80r/min, product of the present invention can be obtained.
Wherein the preparation method of modified emulsifying asphalt is:
Compound emulsifying agent is joined after dissolving in the water of 50 ~ 65 DEG C, add styrene-butadiene latex, interpolymer latex of polystyrene and acrylic ester, stablizer successively, through stirring, adding acid again adjusts pH to be 3 ~ 5, being prepared into emulsion adds in colloidal mill, under colloidal mill effect, be that the heated bitumen of 130 ~ 140 DEG C evenly joins in colloidal mill by temperature, reemulsification 2 ~ 3min can obtain.
The present invention has following beneficial effect:
CRTSI plate-type non-fragment orbit emulsification asphalt cement mortar prepared by the present invention is owing to applying the modified emulsifying asphalt containing styrene-butadiene latex and resin emulsion, both improve the low-temperature performance of pitch, turn improve the degree of mobilization of CA mortar, early strength, frost resistance and weathering resistance.Compared with prior art, it is easy that CRTSI plate-type non-fragment orbit emulsification asphalt cement mortar of the present invention has preparation technology, and the simple feature of equipment, extends work-ing life with the non-fragment orbit that this emulsification asphalt cement mortar is laid.Embodiment
Below in conjunction with embodiment, the invention will be further described.
The present invention has prepared 3 kinds of different modified emulsifying asphalts, preparation method is identical, modified emulsifying asphalt 1# is made up of the raw material of following mass fraction: 90# heavy traffic paving asphalt 60 parts; styrene-butadiene latex 5 parts; interpolymer latex of polystyrene and acrylic ester 5 parts; compound emulsifying agent 3 parts (nonionic emulsifying agent polyoxyethylene octylphenol ether op-10 is 0.5 part; cationic emulsifier octadecyl trimethyl ammonium chloride 1831 is 2 parts; cationic emulsifier aminated lignin RH-C01 is 0.5 part); 1 part, calcium chloride; hydrochloric acid 0.3 part, 35 parts, water.
The preparation method of modified emulsifying asphalt is:
Compound emulsifying agent is joined after dissolving in the water of 60 ± 5 DEG C, add styrene-butadiene latex, interpolymer latex of polystyrene and acrylic ester, stablizer successively, acid for adjusting pH value to 3 ~ 5 are added again through stirring, being prepared into emulsion adds in colloidal mill, under colloidal mill effect, be that the heated bitumen of 135 ± 5 DEG C evenly joins in colloidal mill by temperature, pitch adds rear reemulsification 2min, can obtain modified emulsifying asphalt 1#.
Prepare modified emulsifying asphalt 2#, 3#, raw material composition is in table 1, and 2# pitch used is 90# pitch, and 3# pitch used is 70# pitch.1#, 2#, 3# modified emulsifying asphalt of preparation is carried out evaporation residue test, analyzes its character in table 2.
Table 1 modified emulsifying asphalt raw material composition table
Table 2 modified emulsifying asphalt evaporation residue property list
Wherein, in comparative example 1, the preparation of emulsified bitumen does not add styrene-butadiene latex, interpolymer latex of polystyrene and acrylic ester, and all the other are as the preparation method of modified emulsifying asphalt.
Illustrate that emulsification asphalt cement mortar of the present invention has that good fluidity, early anti pressured intension are high, the feature of weathering resistance, good frost resistance by embodiment 1 ~ 6.
The emulsification asphalt cement mortar preparation method of embodiment 1 ~ 6 is identical, that is:
According to each proportioning raw materials, modified emulsifying asphalt, water, defoamer is added successively in CA mortar stirring tank, under the speed of 50 ~ 70r/min stirs, dry mash, air entrapment agent are added in stirring tank again, after reinforced, stir 5min with the speed of 120 ~ 150r/min, then stir 2min with the speed of 70 ~ 80r/min, product of the present invention can be obtained.
Embodiment 1 ~ 6 each proportioning raw materials used is in table 3, and dry mash used, defoamer, air entrapment agent kind are identical, consisting of of dry mash: cement 34 parts, fine sand 68 parts, swelling agent 3.0 parts, and aluminium powder 0.0025 part, all in mass fraction.Modified emulsifying asphalt is replaced to prepare the product of as a comparison case 2 according to the method for embodiment 1 ~ 6 the unmodified emulsified bitumen of preparation in comparative example 1.
Analyzed by embodiment 1 ~ 6 emulsification asphalt cement mortar, detect main performance index, and contrast with unmodified emulsified bitumen, main performance index is in table 4.
Table 3 emulsification asphalt cement mortar proportioning raw materials table
Table 4 emulsification asphalt cement mortar main performance index table
Index in table 4 is the technical indicator in " the provisional technical qualification of passenger dedicated railway line CRTSI plate-type non-fragment orbit cement emulsified asphalt mortar ".
As can be seen from table 4 and table 5, CRTSI plate-type non-fragment orbit emulsification asphalt cement mortar prepared by the present invention can improve the low-temperature performance of pitch, compared with unmodified, can increase substantially the low temperature extensibility of pitch, particularly improve frost resistance and weathering resistance, show excellent performance.
Claims (10)
1. a CRTS I-type plate-type non-fragment orbit emulsification asphalt cement mortar, is characterized in that being made up of the raw material of following mass fraction: modified emulsifying asphalt 380 ~ 415 parts, dry mash 800 ~ 880 parts, 25 ~ 36 parts, water, defoamer 0.11 ~ 0.3 part and air entrapment agent 0.3 ~ 2 part.
2. emulsification asphalt cement mortar according to claim 1, is characterized in that: described modified emulsifying asphalt is made up of the raw material of following mass fraction: matrix pitch 58 ~ 63 parts, styrene-butadiene latex 2 ~ 10 parts, interpolymer latex of polystyrene and acrylic ester 1 ~ 8 part, compound emulsifying agent 0.5 ~ 8 part, stablizer 0.01 ~ 2 part, acid 0.1 ~ 3 part and 35 ~ 40 parts, water.
3. emulsification asphalt cement mortar according to claim 2, is characterized in that: described matrix pitch is 70# or 90# heavy traffic paving asphalt.
4. emulsification asphalt cement mortar according to claim 2, is characterized in that: described interpolymer latex of polystyrene and acrylic ester is anionic, and solid content is 40 ~ 50%.
5. emulsification asphalt cement mortar according to claim 2, it is characterized in that: described compound emulsifying agent is made up of nonionic emulsifying agent and cationic emulsifier, nonionic emulsifying agent is polyoxyethylene octylphenol ether or polyoxyethylene nonylphenol ether, and the ethoxy radix of nonionic emulsifying agent is 8-30; Cationic emulsifier is one or more in octadecyl trimethyl ammonium chloride, alkyl bi-quaternary ammonium salt or aminated lignin.
6. emulsification asphalt cement mortar according to claim 2, is characterized in that: described stablizer is organic polymer material and/or inorganic salt; Organic polymer material is polyvinyl alcohol, Mierocrystalline cellulose or polyacrylamide; Inorganic salt are calcium chloride or ammonium chloride.
7. emulsification asphalt cement mortar according to claim 2, is characterized in that: described acid is hydrochloric acid or hexanodioic acid.
8. emulsification asphalt cement mortar according to claim 2, it is characterized in that: the preparation method of described modified emulsifying asphalt is: compound emulsifying agent is joined after dissolving in the water of 50 ~ 65 DEG C, add styrene-butadiene latex, interpolymer latex of polystyrene and acrylic ester, stablizer successively, through stirring, add acid for adjusting pH value to 3 ~ 5 again, being prepared into emulsion adds in colloidal mill, under colloidal mill effect, be that the matrix pitch of 130 ~ 140 DEG C evenly joins in colloidal mill by temperature, reemulsification 2 ~ 3min can obtain.
9. emulsification asphalt cement mortar according to claim 1, is characterized in that: described dry mash is made up of the raw material of following mass fraction: cement 30 ~ 37 parts; Fine sand 63 ~ 72 parts; Swelling agent 2.8 ~ 3.2 parts and aluminium powder 0.0020 ~ 0.0030 part.
10. a preparation method for the arbitrary described CRTS I-type plate-type non-fragment orbit emulsification asphalt cement mortar of claim 1-9, is characterized in that step is as follows:
Modified emulsifying asphalt, water, defoamer is added successively in stirring tank, under stirring with the speed of 50 ~ 70r/min, dry mash, air entrapment agent are added in stirring tank again, after reinforced, stir 3 ~ 5min with the speed of 120 ~ 150r/min, then obtain product with the speed of 70 ~ 80r/min stirring 1 ~ 2min.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904882A (en) * | 2017-01-21 | 2017-06-30 | 浙江益森科技股份有限公司 | A kind of preparation method of Emulsified asphalt for slab ballastless track cement mortar |
| CN115215612A (en) * | 2022-07-15 | 2022-10-21 | 武汉铁路职业技术学院 | Composite mortar for filling layer of plate-type ballastless track and preparation method thereof |
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| CN102173646A (en) * | 2011-03-22 | 2011-09-07 | 中国建筑股份有限公司 | CA (cement and asphalt mortar) additive for CRTS I plate-type ballastless tracks and application method thereof |
| CN102219446A (en) * | 2011-03-28 | 2011-10-19 | 湖南盛林建材科技有限公司 | Modified emulsified bitumen cement waterproof coating and preparation method thereof |
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| JPH0624820A (en) * | 1992-07-10 | 1994-02-01 | Hoechst Gosei Kk | Compounded polymer cement mortar powder composition for spraying surface preparation and method for execution of spraying surface preparation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106904882A (en) * | 2017-01-21 | 2017-06-30 | 浙江益森科技股份有限公司 | A kind of preparation method of Emulsified asphalt for slab ballastless track cement mortar |
| CN106904882B (en) * | 2017-01-21 | 2019-02-19 | 浙江益森科技股份有限公司 | A kind of preparation method of Emulsified asphalt for slab ballastless track cement mortar |
| CN115215612A (en) * | 2022-07-15 | 2022-10-21 | 武汉铁路职业技术学院 | Composite mortar for filling layer of plate-type ballastless track and preparation method thereof |
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