CN103342498A - Liquid plasticity expanding agent special for CA (Cellulose Acetate) mortar and preparation method thereof - Google Patents
Liquid plasticity expanding agent special for CA (Cellulose Acetate) mortar and preparation method thereof Download PDFInfo
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- CN103342498A CN103342498A CN2013102880054A CN201310288005A CN103342498A CN 103342498 A CN103342498 A CN 103342498A CN 2013102880054 A CN2013102880054 A CN 2013102880054A CN 201310288005 A CN201310288005 A CN 201310288005A CN 103342498 A CN103342498 A CN 103342498A
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Abstract
The invention discloses a liquid plasticity expanding agent special for CA (Cellulose Acetate) mortar and a preparation method of the liquid plasticity expanding agent. The liquid plasticity expanding agent is prepared by adding a catalyst into branched olefin, Co and water under the condition that the temperature is 50-80 DEG C and the pressure is 0.1-10MPa, wherein the carbon atom number of the branched olefin is C4-C8, reacting for 3-5 hours, subsequently raising the temperature to 80-95 DEG C, adding an emulsifier and a dispersing agent, stirring for 1.5 hours, cooling by lowering the temperature, and subsequently adjusting the pH value to be 6-7 by using NaOH. A product prepared from the liquid plasticity expanding agent is an emulsion of a higher fatty acid mixture that the carbon atom number is C12-C20, the product is subjected to slow hydrolysis reaction at the primary hydration period of CA mortar, and novel CA mortar stirred slurry is subjected to micro volume expansion because of the hydrolyzate. When the mixing amount of the liquid plasticity expanding agent is 0.5% of the gelling material amount, the vertical expansion rate of the CA mortar within 24 hours can be 1-2%, so that a series of quality problems that the plate surface is shrunk, the asphalt gathered surface is subjected to peeling, bubbling and blackening, and the like, due to the fact that the slurry subsides at the plasticity period of the CA mortar, are effectively prevented, and the volume stability of the CA mortar slurry is ensured.
Description
Technical field
The invention belongs to building material technical field, relate to a kind of CA modifying mortar agent of synthesis technique preparation, a kind of CA mortar dedicated liquid plastic expansion agent specifically.
Background technology
China has entered high speed railway construction and the extensive new period of developing, " four vertical four horizontal strokes " personal rapid transit special line and three zones (Yangtze River Delta, the Delta of the Pearl River and Bohai Rim) intercity rail rapid transit system, realized that main busy trunk lines separates lines for passenger and freight transportation, to the year two thousand twenty, China railways business total kilometrage will reach 100,000 kilometers.
The main non-fragment orbit structure that adopts in the present high speed railway construction of China, cement emulsified asphalt mortar (being called for short the CA mortar) filling bed is the important component part of CRTSI type and CRTSII template formula non-fragment orbit structure, it is to be made through specific whipping device and technology mix by cement, sand, bitumen emulsion, multiple admixture material, and its quality quality is directly connected to stationarity and the security of plate-type ballastless track structure durability and train operation.
The CA mortar is as a kind of water cement ratio fluidised form pouring mortar, and the volumetric shrinkage of generation about 1%～3% in glued process of setting is directly used the stability that can influence track structure, and the normal an amount of aluminium powder of interpolation and the U-shaped swelling agent of adopting is to compensate its volumetric shrinkage for this reason.But because the aluminium powder volume is low, its particles dispersed in dry-mix is produced is difficult for evenly, and powdery is soluble, mixing the pore opening that produces in the process processed at the CA mortar differs, be easy to generate the air pocket and the linked hole that are unfavorable for CA mortar frost resistance, and then influence frost resistance and the anti-fatigue performance of CA mortar, the aluminium powder speed of response of getting angry is very fast in addition, factor affected by environment is wayward greatly, the process of often getting angry when the CA mortar is also unhardened is just early to finish, to such an extent as to the plastic expansion that the aluminium powder reaction produces does not have enough anchorage forces and disappears, and can not realize the control action kou to CA mortar plastic stage volume stability.
The objective of the invention is to shrink the expansion sources that does not have to stablize easily control at the CA mortar plastic stage develops.The agent of CA mortar dedicated liquid plastic expansion can realize that in water molecular level disperses, be evenly distributed, the hydrolysis reaction that takes place in CA mortar hydration process is slow, lasting, it is stable, controlled that the hydrolysate that obtains makes the CA mortar plastic stage expand, quality problems such as the plate face contraction that effective inhibition CA mortar plastic stage slurry sedimentation causes, pitch aggregation surface peeling, foaming, blackout have guaranteed that the CA mortar volume is stable.
Summary of the invention
The invention provides a kind of CA mortar dedicated liquid plastic expansion agent and preparation method thereof.Big fluidised form perfusion easily produces big plastic shrinkage deformation characteristics at the CA mortar, has developed a kind of molecular level of can realizing and disperse in water, and the product of hydrolysis reaction can take place in CA mortar hydration process slowly, continue.Hydrated product makes the CA mortar plastic stage produce stable, controllable expansion, effectively suppresses quality problems such as plate face contractions that the sedimentation of CA mortar plastic stage slurry causes, pitch aggregation surface peeling, foaming, blackout, has guaranteed that the CA mortar volume stablizes.Product has overcome that the speed of response of getting angry that conventional use aluminium powder brings is too fast, reaction factor affected by environment reaches air pocket and the linked hole phenomenon that pore opening differs and causes greatly.
The concrete technical scheme of the present invention is characterized in that, the logical CO of branched-chain alkene makes the emulsion that higher fatty acid makes through liquid-phase catalysis after emulsification, dispersion, reactions steps is as follows: add branched-chain alkene, catalyzer and the water that contains 4～8 carbon atoms in reactor, charge into CO, reaction pressure is 0.1～10MPa, open and stir and heating, temperature control gets final product for 50～80 ℃, behind reaction 3～5h, be warming up to 80～95 ℃, add emulsifying agent, dispersion agent stirs 1.5h, to be cooledly isolates catalyzer to the room temperature after-filtration, add NaOH and regulate pH value to 6～7.The agent of above-mentioned a kind of CA mortar dedicated liquid plastic expansion, it is further characterized in that branched-chain alkene is 1-butylene, 1-alkene or 1-octene.
The agent of above-mentioned a kind of CA mortar dedicated liquid plastic expansion, it is further characterized in that catalyzer is boron trifluoride.The agent of above-mentioned a kind of CA mortar dedicated liquid plastic expansion, it is further characterized in that emulsifying agent is aliphatic acid polyethenoxy ether, fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene or its mixture.
The agent of above-mentioned a kind of CA mortar dedicated liquid plastic expansion, it is further characterized in that dispersion agent is a kind of or its mixture in ethoxylated dodecyl alcohol sodium sulfonate, sodium laurate, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, polyoxyethylene nonylphenol ether sodium sulfonate, the lauryl alcohol Soxylat A 25-7.
A kind of CA mortar dedicated liquid plastic expansion of the present invention agent, the composition parts by weight are as follows:
Branched-chain alkene: 100～400 parts
Catalyzer: 0.2～5 part
Water: 400～1000 parts
Emulsifying agent: 0.02～0.5 part
Dispersion agent: 0.01～0.3 part
NaOH:0.3～2 part.
The present invention has the following advantages:
1, produces starting material and have the characteristics such as villaumite, no burn into are easy to get, preparation technology is simple that do not contain;
2, the agent of the special-purpose liquid plastic expansion of this kind CA mortar can evenly disperse in water, volume is little, hydrolysis rate is slowly lasting, and volume only is 0.5% of gel material content, can make the vertical rate of expansion of CA mortar 24h can reach 1%～2%;
3, have no adverse reaction with the compound use of other admixture;
4, little to intensity effect after the hardening of cement;
5, can improve CA mortar density, guarantee that CA mortar plastic expansion is achieved, and can effectively prevent the appearance of CA mortar later stage shrinkage crack.
Embodiment
Further describe the present invention below in conjunction with specific embodiment.
Embodiment 1
In four-hole bottle, add 1-butylene: 245 parts, water: 493 parts, boron trifluoride: 2.3 parts, charge into CO, reaction pressure 2.5MPa opens and stirs and heating, and temperature rises to 70 ℃ of constant temperature, be warming up to 90 ℃ behind the reaction 3.5h, add 0.15 part of fatty alcohol-polyoxyethylene ether, 0.2 part of Sodium dodecylbenzene sulfonate, stir 1.5h, to be cooledly isolate catalyzer to the room temperature after-filtration, add NaOH1.4 part, emulsion pH value 6.2.
Embodiment 2
In four-hole bottle, add 1-alkene: 366 parts, water: 674 parts, boron trifluoride: 3.3 parts, charge into CO, reaction pressure 3.5MPa opens and stirs and heating, and temperature rises to 65 ℃ of constant temperature, be warming up to 85 ℃ behind the reaction 4.5h, add 0.35 part of alkylphenol polyoxyethylene, 0.2 part of sodium laurate, stir 1.5h, to be cooledly isolate catalyzer to the room temperature after-filtration, add NaOH1.0 part, emulsion pH value 6.5.
Embodiment 3
In four-hole bottle, add the 1-octene: 432 parts, water: 930 parts, boron trifluoride: 4.0 parts, charge into CO, reaction pressure 3.2MPa opens and stirs and heating, and temperature rises to 70 ℃ of constant temperature, be warming up to 80 ℃ behind the reaction 5h, add 0.45 part of aliphatic acid polyethenoxy ether, 0.08 part of polyoxyethylene nonylphenol ether sodium sulfonate, stir 1.5h, to be cooledly isolate catalyzer to the room temperature after-filtration, add NaOH1.0 part, emulsion pH value 6.4.
Embodiment 4
In four-hole bottle, add the 1-octene: 432 parts, water: 930 parts, boron trifluoride: 4.0 parts, charge into CO, reaction pressure 3.2MPa opens and stirs and heating, and temperature rises to 80 ℃ of constant temperature, be warming up to 90 ℃ behind the reaction 3.5h, add 0.35 part of aliphatic acid polyethenoxy ether, 0.08 part of polyoxyethylene nonylphenol ether sodium sulfonate, stir 1.5h, to be cooledly isolate catalyzer to the room temperature after-filtration, add NaOH1.0 part, emulsion pH value 6.3.
Embodiment 5
In four-hole bottle, add 1-alkene: 332 parts, water: 631 parts, boron trifluoride: 3.0 parts, charge into CO, original pressure 3.5MPa opens and stirs and heating, and temperature rises to 75 ℃ of constant temperature, be warming up to 85 ℃ behind the reaction 4h, add 0.40 part of alkylphenol polyoxyethylene, 0.28 part of sodium laurate, stir 1.5h, to be cooledly isolate catalyzer to the room temperature after-filtration, add NaOH1.2 part, emulsion pH value 6.4.
Embodiment 6
In four-hole bottle, add 1-butylene: 262 parts, water: 511 parts, boron trifluoride: 3.8 parts, charge into CO, original pressure 2.7MPa, open and stir and heating, temperature rises to 80 ℃ of constant temperature, adds 0.35 part of alkylphenol polyoxyethylene, 0.18 part of lauryl alcohol Soxylat A 25-7 behind the reaction 3h, stir 1.5h, to be cooledly isolate catalyzer to the room temperature after-filtration, add NaOH0.8 part, emulsion pH value 6.7.
Embodiment 7
In four-hole bottle, add 1-butylene: 262 parts, water: 511 parts, boron trifluoride: 3.8 parts, charge into CO, original pressure 3.5MPa, open and stir and heating, temperature rises to 80 ℃ of constant temperature, adds 0.30 part of aliphatic acid polyethenoxy ether, 0.2 part of sodium laurate behind the reaction 3h, stir 1.5h, to be cooledly isolate catalyzer to the room temperature after-filtration, add NaOH1.0 part, emulsion pH value 6.3.
Application Example
Below be performance situation of the present invention: 52.5 grades of test cement P II: cement mill, little wild field, the south of the River produces; Sand: the river sand of fineness modulus 1.56; Emulsified bitumen: four innings of Anhui China Railway Engineering Material Technology Co., Ltd. of group of middle iron produce; Poly-carboxylic water reducer HLC-XI: Nanjing R ﹠ D High Technology Co., Ltd. produces; Defoamer: silicone antifoam agent GD-1.Test method is carried out with reference to [2008] No. 74 civilian relevant provisions of " the provisional technical qualification of passenger dedicated railway line CRTSII type plate type unballasted track cement emulsified bitumen mortar " science and technology base, and the test proportioning sees Table 1, and test-results sees Table 2.
Table 1 test proportioning of the present invention
Table 2 test-results of the present invention
Though the present invention has enumerated part embodiment openly as above; but they are not to limit the present invention; anyly be familiar with this skill person; without departing from the spirit and scope of the invention; can do various variations or retouching from working as; for example certain part of feed composition or process time are done to increase or reduce, but the effect of product may not can be produced substantial effect, so this change belongs within the scope that the application's claim protection domain defines equally.
Claims (6)
1. CA mortar dedicated liquid plastic expansion agent is characterized in that the composition parts by weight are as follows:
Branched-chain alkene: 100～400 parts;
Catalyzer: 0.2～5 part;
Water: 400～1000 parts;
Emulsifying agent: 0.02～0.5 part;
Dispersion agent: 0.01～0.3 part;
NaOH:0.3～2 part.
2. CA mortar dedicated liquid plastic expansion according to claim 1 agent is characterized in that: described branched-chain alkene is 1-butylene, 1-alkene or 1-octene.
3. CA mortar dedicated liquid plastic expansion according to claim 1 agent, it is characterized in that: described catalyzer is boron trifluoride.
4. CA mortar dedicated liquid plastic expansion according to claim 1 agent is characterized in that: described emulsifying agent is one or more mixtures in aliphatic acid polyethenoxy ether, fatty alcohol-polyoxyethylene ether, the alkylphenol polyoxyethylene.
5. CA mortar dedicated liquid plastic expansion according to claim 1 agent is characterized in that: described dispersion agent is one or more mixtures in ethoxylated dodecyl alcohol sodium sulfonate, sodium laurate, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, polyoxyethylene nonylphenol ether sodium sulfonate, the lauryl alcohol Soxylat A 25-7.
6. the preparation method of the described CA mortar of one of claim 1 to 5 dedicated liquid plastic expansion agent, it is characterized in that: difference is the weighing each component by weight percentage, the logical CO of branched-chain alkene makes higher fatty acid through emulsification through liquid-phase catalysis, the emulsion that makes after the dispersion, reactions steps is as follows: add the branched-chain alkene that contains 4～8 carbon atoms in reactor, catalyzer and water, charge into CO, reaction pressure is 0.1～10MPa, open and stir and heating, temperature control gets final product for 50～80 ℃, reaction 3～5h stopped reaction, heat up 80～95 ℃, add emulsifying agent, dispersion agent stirs 1.5h, to be cooledly isolate catalyzer to the room temperature after-filtration, add NaOH and regulate pH value 6～7.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105837142A (en) * | 2016-04-21 | 2016-08-10 | 武汉理工大学 | Micro-expansive coral sand concrete and preparation method thereof |
| CN110304871A (en) * | 2019-08-13 | 2019-10-08 | 易树德 | A kind of the CA mortar and its manufacture craft of CRSTII plate-type non-fragment orbit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105837142A (en) * | 2016-04-21 | 2016-08-10 | 武汉理工大学 | Micro-expansive coral sand concrete and preparation method thereof |
| CN110304871A (en) * | 2019-08-13 | 2019-10-08 | 易树德 | A kind of the CA mortar and its manufacture craft of CRSTII plate-type non-fragment orbit |
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| CN103342498B (en) | 2014-10-01 |
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