CN104692692B - Modified calcium oxide based expanding agent producible in bulk and preparation method of expanding agent - Google Patents
Modified calcium oxide based expanding agent producible in bulk and preparation method of expanding agent Download PDFInfo
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- CN104692692B CN104692692B CN201510061060.9A CN201510061060A CN104692692B CN 104692692 B CN104692692 B CN 104692692B CN 201510061060 A CN201510061060 A CN 201510061060A CN 104692692 B CN104692692 B CN 104692692B
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- expanding agent
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Abstract
The invention provides a modified calcium oxide based expanding agent producible in bulk. The expanding agent is composed of a core layer and a covering layer, wherein the core layer is formed by use of a calcium oxide based expanding agent; the covering layer is formed by use of an alkyd resin; and the mass ratio of the core layer to the covering layer is 95: 5 to 99: 1. The modified calcium oxide based expanding agent producible in bulk has the characteristics of simple manufacturing process, low cost, high weather resistance and the like, and is suitable for the bulk production, sales and engineering application of the expanding agents; the pollution on the environment due to packaging bags can be reduced and the packaging and application costs can be reduced; in short, the modified calcium oxide based expanding agent producible in bulk has remarkable social and economic significance.
Description
Technical field
The present invention relates to a kind of cement expansive material and preparation method thereof and in particular to one kind can in bulk produce, dispensing storehouse
Modified oxidized calcium class extender of storage and preparation method thereof.
Background technology
With the continuous development of chemical admixture technology, and a large amount of uses of various ground mineral admixture, with low water
Glue starts gradually to replace with high water-cement ratio and high cement than with the contemporary high performance concrete that high content mineral admixtures are characterized
The conventional concrete that consumption is characterized, plays leading role in architectural engineering, is promoted the use of by substantial amounts of.However, it is sudden and violent
The distinct issues exposed are that high performance concrete is very easy to cracking in application process, and crack is various corrosion
The intrusion of property medium provides quick passage, induces the endurance issues of concrete, and causes a lot of accidents resulting from poor quality of projects,
Hinder the further genralrlization application of this technology.
Mix extender or be to improve cement concrete volume stability and crack resistance is led for a long time using expanding cement
One of application means wanted, after the key property of extender is incorporation cement concrete, its expansion character can compensate coagulation
Contraction in native hardening process, improves its crack resistance.Traditional ettringite type extender is big because of aquation water requirement, to high water-cement ratio
The compensating action of concrete is preferable, but limited to the shrinkage-compensating effect of low water binder ratio concrete.Calcium oxide expansion agents are because of it
Expansion performance is high, little to workability of concrete performance and Effect on Mechanical Properties, moisture sensitivity is low, can promote admixture aquation etc.
Excellent properties are it is considered to be solve the preferred material of low water binder ratio big admixture high performance concrete shrinkage cracking.But in work
Find in journey application process that calcium oxide expansion agents weatherability is poor, the shelf-life is short, can only be with the pouch bag with plastic inner container
Dress is it is impossible to carry out production in bulk, nor dispensing library storage automatic gauge dispensing during concrete mixing, causes calcium oxide to expand
Agent needs artificial unpacking to feed intake in application process, and inventory is difficult to precise control, seriously hinders calcium oxide expansion agents low
Scale application in water-cement ratio big admixture high performance concrete.
The Chinese patent literature of publication number CN103130437A discloses a kind of preparation method of cement expansive material, is to use
Gypsum Fibrosum and calcium oxide melting calcining formed Gypsum Fibrosum wrap up calcium oxide expansive clinker, further with other powder intergrindings to than
Surface area 140-400m2Obtain after/kg.The weatherability of the expansive clinker that this method is obtained up to 14d, uses it
Preparation extender finished product under conventional terms of packing the shelf-life up to 180d, but do not enable the in bulk of extender finished product
Produce and dispensing library storage.
Content of the invention
The present invention be directed to calcium oxide expansion agents weatherability is poor, the shelf-life is short it is impossible to production in bulk and dispensing storehouse
The technical barrier of storage, provide a kind of can production in bulk modified oxidized calcium class extender and preparation method thereof.
Of the present invention can production in bulk modified oxidized calcium class extender, be made up of with integument core layer, its center
Central layer is calcium oxide expansion agents, and integument is alkyd resin, and core layer is 95 with the mass ratio of integument：5～99：1.
Calcium oxide expansion agents of the present invention are commercially available.
Preferably f-CaO content >=60% in calcium oxide expansion agents；
Alkyd resin of the present invention is long oil alkyd.
Of the present invention can production in bulk modified oxidized calcium class extender preparation method, there is following processing step：
Long oil alkyd is dissolved in volatile organic solvent, makes alkyd resin organic solution；
Described volatile organic solvent be selected from industrial naptha, dimethylbenzene, No. 190 solvent naphthas, No. 200 solvent naphthas, No. 260
Solvent naphtha.
Calcium oxide expansion agents are added and in alkyd resin organic solution, soaks mixing 5～10min, reclaimed using revolving method
Remove organic solvent while prevent powdery extender from lump in dry run, that is, obtain described in can production in bulk modified oxygen
Change calcium class extender.
The revolving recycling of organic solvent, is conducive to environmental protection.
Volatile organic solvent preferred solvent gasoline of the present invention.
The present invention compared with existing product,
Weatherability is strong, can expose storage more than 180d in the in the air that relative humidity is 60% about and not lose swollen
Swollen efficiency, can be conducive to calcium oxide expansion agents big in low water binder ratio in concrete mixing through dispensing storehouse automatic gauge dispensing
Large-scale promotion application in admixture high performance concrete.
And be not required to be dispatched from the factory with the packaging bags with plastic inner container, can be directly with bulk vehicle sale of dispatching from the factory in bulk, it is to avoid mould
Material inner bag and the waste of packaging bag, reduce hand-filling and cost of unpacking, and reduce the packaging bag pollution environment after unpacking simultaneously, have
Beneficial to energy-conserving and environment-protective, there are significant economic results in society.
Specific embodiment
In order to be better understood from the present invention, during the following example, the present invention is further illustrated, should not be recognized
For being any type of restriction to the present invention.
Long oil alkyd is commercially available, and domestic manufacturer has a lot, and the following embodiment of the present invention uses Shenzhen nine
The long oil alkyd of color limited industrial company.
The source of calcium oxide extender is also that market is commercially available, domestic also several manufacturers, following enforcements of the present invention
The calcium oxide extender of the used Jiangsu Subotexin Material Co., Ltd of example.
Embodiment 1
1 part of long oil alkyd is dissolved in volatile industrial naptha, makes alkyd resin organic solution, add
99 parts of f-CaO contents are 65% calcium oxide expansion agents, soak mix and blend 5min, using revolving seasoning by organic solvent
Remove to calcium oxide expansion agents dry tack free, and in dry run continuously stirred avoid powder body extender reunite knot
Block, that is, obtain of the present invention can production in bulk modified oxidized calcium class extender GEA-1.
Embodiment 2
2 parts of long oil alkyds are dissolved in volatile solvent xylene, make alkyd resin organic solution, plus
Enter the calcium oxide expansion agents that 98 parts of f-CaO contents are 65%, soak mix and blend 10min, will be organic using revolving seasoning
Solvent removes to calcium oxide expansion agents dry tack free, and in dry run continuously stirred avoid powder body material reunite knot
Block, that is, obtain of the present invention can production in bulk modified oxidized calcium class extender GEA-2.
Embodiment 3
3 parts of long oil alkyds are dissolved in volatile No. 190 solvent naphthas, make alkyd resin organic solution,
97 parts of f-CaO contents of addition are 65% calcium oxide expansion agents, soak mix and blend 8min, will be organic using revolving seasoning
Solvent removes to calcium oxide expansion agents dry tack free, and in dry run continuously stirred avoid powder body material reunite knot
Block, that is, obtain of the present invention can production in bulk modified oxidized calcium class extender GEA-3.
Embodiment 4
4 parts of long oil alkyds are dissolved in volatile No. 200 solvent naphthas, make alkyd resin organic solution,
96 parts of f-CaO contents of addition are 65% calcium oxide expansion agents, soak mix and blend 6min, will be organic using revolving seasoning
Solvent removes to calcium oxide expansion agents dry tack free, and in dry run continuously stirred avoid powder body material reunite knot
Block, that is, obtain of the present invention can production in bulk modified oxidized calcium class extender GEA-4.
Embodiment 5
5 parts of long oil alkyds are dissolved in volatile No. 260 solvent naphthas, make alkyd resin organic solution,
95 parts of f-CaO contents of addition are 65% calcium oxide expansion agents, soak mix and blend 10min, will be had using revolving seasoning
Machine solvent removes to calcium oxide expansion agents dry tack free, and in dry run continuously stirred avoid powder body material reunite
Caking, that is, obtain of the present invention can production in bulk modified oxidized calcium class extender GEA-5.
Embodiment 6
1.5 parts of long oil alkyds are dissolved in volatile industrial naptha, make alkyd resin organic solution, plus
Enter the calcium oxide expansion agents that 98.5 parts of f-CaO contents are 65%, soak mix and blend 6min, will be organic using revolving seasoning
Solvent removes to calcium oxide expansion agents dry tack free, and in dry run continuously stirred avoid powder body material reunite knot
Block, that is, obtain of the present invention can production in bulk modified oxidized calcium class extender GEA-6.
Embodiment 7
2.5 parts of long oil alkyds are dissolved in volatile industrial naptha, make alkyd resin organic solution, plus
Enter the calcium oxide expansion agents that 97.5 parts of f-CaO contents are 65%, soak mix and blend 7min, will be organic using revolving seasoning
Solvent removes to calcium oxide expansion agents dry tack free, and in dry run continuously stirred avoid powder body material reunite knot
Block, that is, obtain of the present invention can production in bulk modified oxidized calcium class extender GEA-7.
Embodiment 8
3.5 parts of long oil alkyds are dissolved in volatile dimethylbenzene, make alkyd resin organic solution, add
96.5 parts of f-CaO contents are 65% calcium oxide expansion agents, soak mix and blend 8min, will be organic molten using revolving seasoning
Agent removes to calcium oxide expansion agents dry tack free, and in dry run continuously stirred avoid powder body material reunite knot
Block, that is, obtain of the present invention can production in bulk modified oxidized calcium class extender GEA-8.
Embodiment 9
4.5 parts of long oil alkyds are dissolved in volatile dimethylbenzene, make alkyd resin organic solution, add
95.5 parts of f-CaO contents are 65% calcium oxide expansion agents, soak mix and blend 9min, will be organic molten using revolving seasoning
Agent removes to calcium oxide expansion agents dry tack free, and in dry run continuously stirred avoid powder body material reunite knot
Block, that is, obtain of the present invention can production in bulk modified oxidized calcium class extender GEA-9.
Embodiment 10
2 parts of long oil alkyds are dissolved in volatile industrial naptha, make alkyd resin organic solution, add
98 parts of f-CaO contents are 75% calcium oxide expansion agents, soak mix and blend 5min, using revolving seasoning by organic solvent
Remove to calcium oxide expansion agents dry tack free, and in dry run continuously stirred avoid powder body extender reunite knot
Block, that is, obtain of the present invention can production in bulk modified oxidized calcium class extender GEA-10.
Embodiment 11
2 parts of long oil alkyds are dissolved in volatile industrial naptha, make alkyd resin organic solution, add
98 parts of f-CaO contents are 85% calcium oxide expansion agents, soak mix and blend 5min, using revolving seasoning by organic solvent
Remove to calcium oxide expansion agents dry tack free, and in dry run continuously stirred avoid powder body extender reunite knot
Block, that is, obtain of the present invention can production in bulk modified oxidized calcium class extender GEA-11.
Take obtained by the present invention can production in bulk modified oxidized calcium class extender GEA-1, GEA-2, GEA-3, GEA-
4th, GEA-5, GEA-6, GEA-7, GEA-8, GEA-9, GEA-10, GEA-11 and unmodified commercially available f-CaO content are 65%
Calcium oxide expansion agents GEA-01, f-CaO content is 75% calcium oxide expansion agents GEA-02, f-CaO content is 85%
The each 100g of calcium oxide expansion agents GEA-03 is loaded into the stainless teel pallet of 10 × 10cm square and spreads out, makes to open above
In the state of 20 DEG C, relative humidity 60% indoor placement 180d, comparative study embodiment of the present invention GEA-1, GEA-2,
GEA-3, GEA-4, GEA-5, GEA-6, GEA-7, GEA-8, GEA-9, GEA-10, GEA-11 and the unmodified commercially available oxygen of comparative example
Change the water absorption rate that calcium class extender GEA-01, GEA-02, GEA-03 expose in storage 180d age in 60% relative humidity, examination
Test and the results are shown in Table 1.
Table 1
By embodiment of the present invention GEA-1, GEA-2 after indoor placement 0d, 28d and 180d of relative humidity 60%,
GEA-3, GEA-4, GEA-5, GEA-6, GEA-7, GEA-8, GEA-9, GEA-10, GEA-11 and comparative example GEA-01, GEA-02,
GEA-03, with reference to existing national standards《Cement expansive material》The method inspection limited expansion rate that GB23439-2009 specifies, right
Than research the embodiment of the present invention and comparative example exposes in 60% relative humidity store different larval instar after 7d limited expansion rate
And expansion survival rate, result of the test is shown in Table 2.
Table 2
Be can be seen that relatively wet 60% through the modified calcium oxide extender of long oil alkyd parcel by data in table
After exposing storage 28d and 180d in degree environment, still there is larger expansion rate, in 60% relative humidity conditions, expose storage
Substantially do not reduce its expansion performance, and unmodified three kinds of calcium oxide extenders do not expose and have larger expansion character during storage,
But after exposing storage 28d and 180d in 60% relative humidity conditions, its expansion rate significantly reduces, and storage time is longer, expands
Rate declines more obvious.It can be seen that, unmodified calcium oxide extender can not expose in atmosphere to be deposited, and answers sealed storage could keep
Its expansion performance did not lost efficacy, and also cannot be used for production and selling in bulk, modified by this invention after calcium oxide extender exist
Still there is larger expansion performance after exposing storage 180d in 60% relative humidity conditions, expose in atmosphere and expand when depositing
Efficiency be difficult lost efficacy, can production and selling in bulk, be conducive to energy-conserving and environment-protective.
Claims (4)
1. a kind of can production in bulk modified oxidized calcium class extender it is characterised in that being made up of with integument core layer, wherein
Core layer is calcium oxide expansion agents, and integument is alkyd resin, and core layer is 95 with the mass ratio of integument：5～99：1, institute
The alkyd resin stated is long oil alkyd.
2. according to claim 1 can production in bulk modified oxidized calcium class extender it is characterised in that described calcium oxide
F-CaO content >=60% in class extender.
3. described in any one of claim 1-2 can production in bulk modified oxidized calcium class extender preparation method, its
It is characterised by that there is following processing step：
Long oil alkyd is dissolved in volatile organic solvent, makes alkyd resin organic solution；
Described volatile organic solvent is selected from industrial naptha, dimethylbenzene, No. 190 solvent naphthas, No. 200 solvent naphthas, No. 260 solvents
Oil；
Calcium oxide expansion agents are added and in alkyd resin organic solution, soaks mixing 5～10min, reclaimed using revolving method and remove
Prevent powdery extender from luming in dry run while organic solvent, that is, obtain described can production in bulk modified oxidized calcium
Class extender.
4. method according to claim 3 is it is characterised in that described volatile organic solvent is industrial naptha.
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| CN104692692B true CN104692692B (en) | 2017-02-22 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101432132A (en) * | 2004-09-20 | 2009-05-13 | 禾逊专业化学公司 | Particles for use as proppants or in gravel packs, methods for making and using the same |
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2015
- 2015-02-05 CN CN201510061060.9A patent/CN104692692B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101432132A (en) * | 2004-09-20 | 2009-05-13 | 禾逊专业化学公司 | Particles for use as proppants or in gravel packs, methods for making and using the same |
Non-Patent Citations (3)
| Title |
|---|
| 氧化钙砂表面改性及其抗水化性能研究;梁永和;《武汉科技大学学报》;20080615;第31卷(第3期);第247-249页 * |
| 水乳环氧对水泥砂浆强度的影响;陈友治;《重庆大学学报》;20031230;第26卷(第12期);第48-50页 * |
| 调理剂对醇酸树脂包膜尿素缓释性能的影响;卢玉栋等;《应用化工》;20100728;第39卷(第7期);第984-987页 * |
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