CN102101791A - High-temperature resistant cement emulsified asphalt mortar material - Google Patents
High-temperature resistant cement emulsified asphalt mortar material Download PDFInfo
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- CN102101791A CN102101791A CN2011100427662A CN201110042766A CN102101791A CN 102101791 A CN102101791 A CN 102101791A CN 2011100427662 A CN2011100427662 A CN 2011100427662A CN 201110042766 A CN201110042766 A CN 201110042766A CN 102101791 A CN102101791 A CN 102101791A
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Abstract
The invention relates to a high-temperature resistant cement emulsified asphalt mortar material which comprises the following components in parts by weight: 100 parts of cement, 35-45 parts of emulsified asphalt, 135-165 parts of fine aggregate, 0.001-0.02 part of aluminum powder, 25-35 parts of water, 0.1-0.6 part of water reducing agent and 0.1-0.3 part of chelating agent. The invention has the following characteristics of still having favorable workability, namely maintaining the flowability of mortar for a long time without greatly increasing of consumption quantities of water , the retarder and the water reducing agent or greatly reducing the initial fluidity of mortar even if mortar and environment temperatures are high, having no obvious adverse influence on other performances of the mortar, meeting the construction requirement and guaranteeing the construction quality.
Description
Technical field
The invention belongs to the road building material field, is a kind of resistant to elevated temperatures cement emulsified asphalt mortar material specifically, is applicable to non-fragment orbit engineerings such as inter-city high-speed rail, rapid transit and city underground.
Background technology
Emulsification asphalt cement mortar (CA mortar) is to be main raw material by cement, emulsified bitumen, adding other complementary compositions is prepared from through certain stirring technique at normal temperatures, it is the important component part of plate-type ballastless track, can make track have rational elasticity on the one hand, be convenient on the other hand adjust the track construction error, so the use of this elastic damping material of cement asphalt mortar all has important effect for improving train security of running at high speed and the comfortableness of taking.In addition, compare with the high elastic rubber material, it also have with track plate bottom surface contact, convenient construction, cost performance advantages of higher, therefore, this technique means is all adopted in the construction of present domestic high-speed railway.The emulsified asphalt slurry technology mainly is divided into two kinds: wherein the I type originates from Japan; The II type originates from Germany.
Employed cement emulsified asphalt mortar is the II type in the Beijing-Shanghai express railway construction.In present job specifications, require the cement-emulsified bituminous construction temperature can not be above 35 ℃, this mainly is because when temperature is higher than this value, most of cement emulsified asphalt mortar operable times short (mobile loss is fast), may occur stirring or filling process in the situation of solidifying rapidly appears, this not only can cause the waste of material, resource such as artificial, and can delay the duration and bring construction quality hidden danger.But in hot weather construction, it is normally very difficult to satisfy this condition.Therefore, guarantee carrying out smoothly of hot weather construction, must make cement emulsified asphalt mortar can under higher temperature, keep normal serviceability by technique means.
Although United States Patent (USP) (US006114418A) relates to the heat resistance that improves the CA mortar, from present field conduct effect, still have deficiency, this is not reciprocity mainly due to laboratory and working-yard information, causes and the working-yard condition is more complicated, harsh.
Simple way can increase flowability by rolling up water consumption, even can be much smaller than the lower limit 80s of " the provisional technical qualification of passenger dedicated railway line CRTS II type plate type unballasted track cement emulsified bitumen mortar " requirement; Another kind of scheme is to increase water reducer (effect of collapsing of guarantor is generally all arranged) consumption with the assurance working hour, but can significantly prolong the time of coagulation of bituminous mortar simultaneously.This has satisfied the requirement of construction to a certain extent, but these means are cost to sacrifice mortar performance to a certain extent all.Because before the research for the CA mortar performance all was on the normal temperature basis, water consumption, admixture consumption all are that strictness is undertaken by formulating of recipe.Because the scene has increased water consumption greatly, from the characteristic of cement-based material, must be unfavorable to the frost resistance of mortar; And retarding water reducer is longer to the influence time of aquation, and the resolution of mortar is increased, and has increased mortar bleeding and isolating danger coefficient.Therefore, such scheme all can bring new problem, should not adopt.
Summary of the invention
The technical problem to be solved in the present invention is the problem of existing cement emulsified asphalt mortar material resistance to elevated temperatures difference, and a kind of remarkable retarding effect that both do not had is provided, and has the resistant to elevated temperatures cement emulsified asphalt mortar material of the time of doing than the farm labourer again.
The applicant discovers, the influence factor that influences the mobile loss of cement emulsified asphalt mortar most critical is the stability of emulsified bitumen in mortar, and the principal element that influences this performance of emulsified bitumen is Ca in the mortar
2+, Mg
2+Isoionic concentration.Because Ca
2+, Mg
2+Plasma is to be produced by hydrated cementitious, therefore, though use retardant can control loss to a certain extent, has also caused the significantly prolongation of mortar time of coagulation simultaneously.
The applicant is by a large amount of research and test, confirm by the admixture sequestrant, can keep the concentration of mortar intermediate ion on the one hand in a long time, improved cement-emulsified bituminous heat resistance greatly, simultaneously condensing of mortar do not made significant difference, guaranteed the fundamental property of mortar; In addition owing to do not need to roll up water consumption, also provide necessary guarantee to the weather resistance of mortar.
Based on above-mentioned research, the present invention proposes a kind of resistant to elevated temperatures cement emulsified asphalt mortar material that comprises following component:
100 parts of cement, 35～45 parts of emulsified bitumens, 135～165 parts of fine aggregates, 0.001～0.02 part of aluminium powder, 25～35 parts in water, 0.1～0.6 part of water reducer, 0.1～0.3 part of sequestrant more than is weight part.
The above-mentioned materials mixing and stirring can be made the present invention.
The water consumption of the present invention under normal temperature (5 ℃-28 ℃) is 25～31 parts, and the water consumption under the high temperature (28 ℃-40 ℃) is 28～35 parts.
Above-mentioned fine aggregate refers to the following aggregate of 4.75mm, is commonly called as sand.
Above-mentioned sequestrant is selected from hydroxy ethylene diphosphonic acid (HEDP), hydroxy ethylene diphosphonic acid disodium, hydroxy ethylene diphosphonic acid four sodium, amino trimethylene methylphosphine (ATMP), Amino Trimethylene Phosphonic Acid four sodium, ethylenediamine tetraacetic acid (EDTA) (EDTA), diethylenetriamine pentamethylene phosphonic acids (DTPMP) etc. are to Ca
2+, Mg
2+Ion has the mixture of one or more arbitrary proportions in the material that chela (network) cooperation uses.
Above-mentioned water reducer is a polycarboxylate water-reducer, water-reducing rate about 30%.
Above-mentioned aluminium powder mainly plays the compensation distortion in the present invention, and preferred 200 order flakey aluminium powders also can pass through
-2-
The aluminium powder of other particle diameter and shape reaches this purpose.
Embodiment
For the present invention is described better, further illustrate content of the present invention below in conjunction with example, but content of the present invention not only is confined to the following examples.
In order to simulate the differing temps environment that mortar stands in the practice of construction, each example correlated performance under the condition of normal temperature (20 ℃) and high temperature (40 ℃) respectively compares.Because cement asphalt mortar at high temperature will reach the flowability of regulation, water consumption increases to some extent with respect to the normal temperature water consumption is inevitable, has listed the water consumption of mortar under normal temperature and two kinds of conditions of high temperature in the table 1 respectively.
Cement emulsified asphalt mortar Comparative Examples and embodiment proportioning (unit is a weight part) see Table 1 respectively, table 2:
The material fiting ratio of table 1 cement emulsified asphalt mortar Comparative Examples
The material fiting ratio of table 2 various embodiments of the present invention
Table 3, table 4 table 4 have been listed the implementation result of each example under normal temperature and high temperature in table 1, the table 2 respectively.
In the table, degree of mobilization and divergence are the test result of new sand cutting slurry, carry out with reference to " No. [2008] 74, the provisional technical qualification science and technology of passenger dedicated railway line CRTS II type plate type unballasted track cement emulsified bitumen mortar base ", are used for the initial performance of unified mortar.
Bleeding rate is with reference to GB/T 50080-2002 Standard for test methods of properties of ordinary concrete mixture standard, and the adjustment member detailed rules and regulations are carried out; Resolution is carried out with reference to " No. [2008] 74, the provisional technical qualification science and technology of passenger dedicated railway line CRTS II type plate type unballasted track cement emulsified bitumen mortar base " appendix G, and is close with the military service property relationship of mortar.
Operable time refers to that mortar finishes the time that the 1L mortar of picking up counting to the end can finish be experienced by the degree of mobilization determinator fully from stirring, and every 15min once tests.When mortar can not pass through the degree of mobilization determinator fully, the amount that record can pass through, this index were the important factors (especially under hot conditions) that can the decision construction be carried out smoothly.
Table 3 Comparative Examples implementation result
Table 4 embodiment implementation result
Comparative Examples 1 is Portland cement bituminous mortar prescription, Comparative Examples 2,3 is respectively the temperature resistant capability that increases mortar by the method for admixture retardant and raising water reducer consumption, and Comparative Examples 4 is to make the more runny method of mortar prolong the operable time of mortar by the water consumption increase.
Comparative Examples 2 shows, increases retardant to original state influence and little, but has obviously increased the bleeding of mortar, and resolution increases by 140%; The temperature resistant capability of mortar is obviously promoted.
Comparative Examples 3 shows that increase water reducer consumption not only bleeding rate obviously increases, and divergence also significantly increases, and layering, isolating risk raise, and shown in data, resolution has increased by 460%; The temperature resistant capability of mortar also has lifting
Comparative Examples 4 shows, increases water consumption, and bleeding rate and resolution also are significantly increased.In addition, increase the reduction that water-cement ratio must cause the cement-based material frost resistance, this reach common understanding in the concrete industry (gelling material is quantitatively, increases water consumption and promptly increases water cement ratio) herein; Temperature resistant capability improves not obvious.
This shows that above-mentioned several measures have all significantly reduced the military service performance of cement asphalt mortar.
Embodiment 1～9 shows, the temperature resistant capability of mortar does not reach the prescription of mixing retardant behind the sequestrant though mix, and is more or less the same with the effect of mixing retardant, can solve the perfusion problem under the on-the-spot hot conditions fully; And make in this way, mortar performance at normal temperatures is influenced very little, does not reduce the military service performance of cement asphalt mortar substantially.Therefore over-all properties of the present invention is that several measures are incomparable in the Comparative Examples.
Claims (2)
1. resistant to elevated temperatures cement emulsified asphalt mortar material is characterized in that it comprises following component:
100 parts of cement, 35 ~ 45 parts of emulsified bitumens, 135 ~ 165 parts of fine aggregates, 0.001 ~ 0.02 part of aluminium powder, 25 ~ 35 parts in water, 0.1 ~ 0.6 part of water reducer, 0.1 ~ 0.3 part of sequestrant more than is weight part.
2. a kind of resistant to elevated temperatures cement emulsified asphalt mortar according to claim 1, it is characterized in that: described sequestrant is selected from hydroxy ethylene diphosphonic acid (HEDP), hydroxy ethylene diphosphonic acid disodium, hydroxy ethylene diphosphonic acid four sodium, amino trimethylene methylphosphine (ATMP), Amino Trimethylene Phosphonic Acid four sodium, ethylenediamine tetraacetic acid (EDTA) (EDTA), the mixture of one or more arbitrary proportions in the diethylenetriamine pentamethylene phosphonic acids (DTPMP).
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| CN201110042766.2A CN102101791B (en) | 2011-02-23 | 2011-02-23 | High-temperature resistant cement emulsified asphalt mortar material |
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| CN201110042766.2A CN102101791B (en) | 2011-02-23 | 2011-02-23 | High-temperature resistant cement emulsified asphalt mortar material |
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| CN102101791B CN102101791B (en) | 2015-02-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103204646A (en) * | 2012-01-17 | 2013-07-17 | 中国铁道科学研究院铁道建筑研究所 | Special stabilizing agent for cement-emulsified asphalt mortar |
| CN104891874A (en) * | 2015-05-05 | 2015-09-09 | 中国铁道科学研究院金属及化学研究所 | Cement-emulsified asphalt mortar and preparation method thereof |
| CN111484268A (en) * | 2020-04-20 | 2020-08-04 | 广东六合新型建材有限公司 | Workability agent for enhancing concrete strength |
| CN113227499A (en) * | 2018-12-25 | 2021-08-06 | 日本大成道路技术株式会社 | Normal temperature mixture |
Citations (3)
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|---|---|---|---|---|
| CN1821156A (en) * | 2006-02-28 | 2006-08-23 | 武汉理工大学 | High early strength self expansion CA mortar material |
| CN101468244A (en) * | 2007-12-24 | 2009-07-01 | 中国恩菲工程技术有限公司 | Stabilization method and kneader system for flyash cement |
| CN101962279A (en) * | 2009-07-24 | 2011-02-02 | 北京市建筑工程研究院 | CA mortar with micro pore structure regulated by soluble foaming agent |
-
2011
- 2011-02-23 CN CN201110042766.2A patent/CN102101791B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1821156A (en) * | 2006-02-28 | 2006-08-23 | 武汉理工大学 | High early strength self expansion CA mortar material |
| CN101468244A (en) * | 2007-12-24 | 2009-07-01 | 中国恩菲工程技术有限公司 | Stabilization method and kneader system for flyash cement |
| CN101962279A (en) * | 2009-07-24 | 2011-02-02 | 北京市建筑工程研究院 | CA mortar with micro pore structure regulated by soluble foaming agent |
Non-Patent Citations (2)
| Title |
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| 《铁道建筑》 20100915 徐静等 "CA砂浆强度的影响因素及作用机理研究" , 第9期 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103204646A (en) * | 2012-01-17 | 2013-07-17 | 中国铁道科学研究院铁道建筑研究所 | Special stabilizing agent for cement-emulsified asphalt mortar |
| CN103204646B (en) * | 2012-01-17 | 2015-09-02 | 中国铁道科学研究院铁道建筑研究所 | Cement emulsified asphalt mortar is stabilizing agent specially used |
| CN104891874A (en) * | 2015-05-05 | 2015-09-09 | 中国铁道科学研究院金属及化学研究所 | Cement-emulsified asphalt mortar and preparation method thereof |
| CN104891874B (en) * | 2015-05-05 | 2017-08-04 | 中国铁道科学研究院金属及化学研究所 | A kind of cement emulsified asphalt mortar and preparation method thereof |
| CN113227499A (en) * | 2018-12-25 | 2021-08-06 | 日本大成道路技术株式会社 | Normal temperature mixture |
| CN111484268A (en) * | 2020-04-20 | 2020-08-04 | 广东六合新型建材有限公司 | Workability agent for enhancing concrete strength |
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|---|---|
| CN102101791B (en) | 2015-02-04 |
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Free format text: FORMER OWNER: JIANGSU SUBOTE NEW MATERIAL CO., LTD. JAINGSU ACADEMY OF BUILDING RESEARCH CO., LTD. Effective date: 20140429 Owner name: JIANGSU SUBOTE NEW MATERIAL CO., LTD. Free format text: FORMER OWNER: BOTE NEW MATERIAL CO., LTD., JIANGSU Effective date: 20140429 |
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Effective date of registration: 20140429 Address after: Jiangning District of Nanjing City, Jiangsu province 211103 Li Quan Lu No. 69 Applicant after: Jiangsu Subute New Materials Co., Ltd. Address before: 211103, No. 59 West Wan An Road, Jiangning District, Jiangsu, Nanjing Applicant before: Jiangsu Bote New Materials Co., Ltd. Applicant before: Jiangsu Subute New Materials Co., Ltd. Applicant before: Jiangsu Provincial Architectural Science Institute Ltd. |
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Address after: 210008 No. 12, Beijing West Road, Gulou District, Nanjing City, Jiangsu Province Patentee after: Jiangsu Subute New Materials Co., Ltd. Address before: 211103 No. 69 Liquan Road, Jiangning District, Nanjing City, Jiangsu Province Patentee before: Jiangsu Subute New Materials Co., Ltd. |