CN101367633A - Intelligent shrinkage reducing agent for concrete, preparation method and application thereof - Google Patents
Intelligent shrinkage reducing agent for concrete, preparation method and application thereof Download PDFInfo
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- CN101367633A CN101367633A CNA2008101970620A CN200810197062A CN101367633A CN 101367633 A CN101367633 A CN 101367633A CN A2008101970620 A CNA2008101970620 A CN A2008101970620A CN 200810197062 A CN200810197062 A CN 200810197062A CN 101367633 A CN101367633 A CN 101367633A
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 63
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 14
- 229920002401 polyacrylamide Polymers 0.000 claims description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 10
- 239000013543 active substance Substances 0.000 claims description 10
- 229920000570 polyether Polymers 0.000 claims description 10
- 229920006395 saturated elastomer Polymers 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 239000004575 stone Substances 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 8
- -1 polypropylene Polymers 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 claims description 6
- 230000008961 swelling Effects 0.000 claims description 6
- 239000013067 intermediate product Substances 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 3
- 239000003112 inhibitor Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 238000007796 conventional method Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 8
- 239000011230 binding agent Substances 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000036571 hydration Effects 0.000 abstract 1
- 238000006703 hydration reaction Methods 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
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- 230000008901 benefit Effects 0.000 description 3
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- 239000000835 fiber Substances 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
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- 238000005336 cracking Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000010534 mechanism of action Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012496 blank sample Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
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- 238000002425 crystallisation Methods 0.000 description 1
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- 239000000017 hydrogel Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/56—Opacifiers
- C04B2103/58—Shrinkage reducing agents
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a material which is developed with an aim at the facts that the prior concrete has the characteristics of low water binder ratio and great amount of external addition of minerals, the water contained in the prior concrete hardly satisfies the requirement on the full hydration of gel materials and the effect of external water supply for maintenance is not satisfactory. The aim of the invention is to provide an intelligent shrinkage reducing agent preparation process for concrete; as the concrete shrinkage reducing agent, the material can intelligently provide humidity in the concrete, and the addition of the material accounts for 0.03 to 0.05 wt percent with respect to the gel material in the concrete. The test result shows that the intelligent shrinkage reducing agent can keep the water in the concrete in a certain degree; the addition of the intelligent shrinkage reducing agent with an appropriate amount can remarkably reduce the shrinkage and deformation of the concrete so as to achieve the aim of improving the durability of the concrete.
Description
Technical field
The invention belongs to civil engineering material technical field, be specifically related to intelligent shrinkage reducing agent for concrete and its production and application.
Background technology
Concrete is the material of construction of Contemporary Architecture engineering consumption maximum, since cement appearance in 1824 and concrete birth thereupon, so far existing nearly 200 years history, concrete works technology the invariably accompany needs of engineering construction and scientific technological advance and progressive.Meanwhile, concrete many new problems can occur in application process, and particularly outstanding is concrete weather resistance deterioration problem in recent years.Because the weather resistance deficiency causes the accident of structure deteriorate to happen occasionally, the financial loss that causes thus also is difficult to the appraisal.
Since the composition and the constructional feature of modern concrete itself, slurry thickness, good water-retaining property, and water migration is subjected to certain limitation, and makes its self-constriction phenomenon outstanding because of low water binder ratio.It generally has the trend that infant cracking takes place, though at present to the existing consistent understanding of the fissured origin cause of formation, and many opinions and method have been proposed, be not effectively controlled so far, and be on the rise.The concrete works causes of cracks is a lot, relates to each links such as material mix proportion, structure design, construction and later stage maintenance, and cross influence and effect mutually between these factors, and it is very complicated to make that the concrete works Crack Control becomes.Only according to design or constructional method, fundamentally eliminate non-load crack and still have any problem.
From features such as engineering structure failure damages, the concrete material proportioning should be the fissured first element of control engineering, the crack is the macroscopical form that structure deteriorate was lost efficacy and showed, and produce fissured mechanism process is to change closely related with the concrete material body, the generation of early concrete engineering cracks is except that being subjected to various load function influences, and concrete contraction is very crucial.Current have measures such as fiber, swelling agent and the economization agent of interpolation in control concrete cracking proportioning optimization design, its purpose all is to reduce various shrinkage strains, but the mechanism of action of various admixtures all has different with effect.With regard to the adding of fiber, it has stoped fissured expansion and extension to a certain extent, but it mainly plays the effect of dispersion or the distribution of homogenizing string stress, and can not fundamentally eliminate fissured generation; Swelling agent is by carrying out a series of chemical reaction with the hydrated cementitious product, generate the contraction that the expansion crystallization comes compensating concrete, this process wants a large amount of water to participate in reaction, under the maintenance condition of poor (insufficient) as moisture, the effect of prestressed of swelling agent can not be given full play to, so its quality instability, with the bad adaptability of concrete system, control swell increment and expansion time all are difficult to control; Traditional economization agent is by the surface tension of liquid phase in the reduction concrete kapillary, and capillary negative pressure is descended, and reduces string stress, and performance is good than the above two, but because its cost is higher, therefore limits the scope that it is applied.
With respect to traditional economization agent, here intelligent shrinkage reducing agent (Intelligentized Shrinkage-Reducing Agent, be called for short ISRA) be a kind of water to be had special adsorbing polymer-function material, its inside has the intensive hydrophilic radical, different with common sorbing materials such as sponge, paper fiber and cotton, the water-absorbent gelatinous material can absorb the water of hundreds and thousands of times of own wts, expand into a kind of simultaneously and the solid bonded hydrogel of water dungeon.Even be subjected to sizable pressure, the water in this gel also seldom is extruded.
Because the modern concrete water-cement ratio is generally on the low side, so the use of water reducer has now become a kind of component indispensable in the mix Design.But because mixing of water reducer generally can increase concrete contraction, so once stipulated in " concrete admixture " (GB8076-1997) of country standard, even acceptable end product also allows shrinkage ratio to reach 135%.Therefore, this product is as the development and the application of shrinkage type admixture, for realizing comprehensive lifting of admixture technology, reduce the non-load of concrete crack, improve concrete durability and become possibility, start the free of contamination intelligent shrinkage reducing agent of a kind of environmental protection, had important social benefit and huge economic benefit.
Summary of the invention
The object of the present invention is to provide a kind of intelligent shrinkage reducing agent for concrete and its production and use, described intelligent shrinkage reducing agent can provide humidity at inside concrete, under the prerequisite of not obvious reduction concrete strength, by in concrete, mixing an amount of intelligent shrinkage reducing agent, can significantly reduce concrete shrinkage strain performance, reach the purpose that improves concrete durability.
For realizing purpose of the present invention, the technical scheme that provides is: a kind of intelligent shrinkage reducing agent for concrete, mainly polyacrylamide, the polyether high molecular tensio-active agent of 2-7%, the wilkinite of 22-33%, the thunder holder stone of 42-50% and the polypropylene of 5-12% by the 10-20% of weight percent constitutes.
The molecular-weight average of above-mentioned polyacrylamide (300-800) * 10
4, the molecular-weight average 1000-1600 of polyether high molecular tensio-active agent, polyacrylic molecular-weight average 6000-10000.
The present invention also provides the preparation method of above-mentioned intelligent shrinkage reducing agent for concrete: according to the above ratio, with polyacrylamide, wilkinite, thunder holder stone and polypropylene mix, and be the sodium hydroxide solution that the ratio of 1:1-1:1.3 adds 0.1mol/L in the mol ratio of polyacrylamide and sodium hydroxide, add the polyether high molecular tensio-active agent then, with the ultrasonic dispersing dissolving evenly, after adding phenolphthalein indicator, feed the hydrochloric acid of 0.1mol/L again, till solution no longer shows redness, then with the polymers soln that obtains under 50-70 ℃, the polyreaction of carrying out 30-50min obtains intermediate product, cuts into 0.5-2 centimetre of big fritter with obtaining intermediate product, dries then to constant weight and gets work in-process, in work in-process, add rust inhibitor again, stablizer and deionized water, its consumption is respectively 0.02,0.03 and 8-10 times of work in-process total amount, after stirring, superfine grinding, after the vibration swelling, cross 100 mesh sieves, promptly get intelligent shrinkage reducing agent.
The concentration of above-mentioned sodium hydroxide solution is 0.1mol/L, and the concentration of hydrochloric acid is 0.1mol/L.
Above-mentioned intelligent shrinkage reducing agent for concrete is used in the preparation concrete.
Above-mentioned intelligent shrinkage reducing agent volume is the 0.03-0.05wt% of gelling material in the concrete.
The add-on of above-mentioned concrete mixing water is the absorb water water yield of contained moisture in the saturated formation gelinite of concrete water consumption deduction intelligent shrinkage reducing agent in according to a conventional method.
Prepare concrete technology for adopting secondary to add the concrete mixing water, the intelligent shrinkage reducing agent saturated formation gelinite that absorbs water is together added with concrete mixing water for the first time.
The present invention is different with the action principle of traditional economization agent, when having controlled self-constriction effectively and producing, also makes cement obtain maximum aquation, has greatly solved the dry problem of shrinking of concrete.In actual engineering, can utilize characteristics such as little, the easy dispersion of its particle fineness, strong discharging water property of suction quantitatively to control the addition content of intelligent shrinkage reducing agent, and then control aquation moisture content realizes the purpose of reducing stage by stage, and it is fast and convenient to reach construction, the low requirement of shrinking of implementation structure.Because intelligent shrinkage reducing agent mixes after the concrete, its particle fineness and volume all can produce Different Effects to concrete performance, by testing application indexes such as determining the fineness of intelligent shrinkage reducing agent in concrete, volume, provide intelligent shrinkage reducing agent simultaneously and be applied to concrete method.
China builds (structure) in a large number and builds engineering and lose functions of use because of the concrete durability problem, causes huge financial loss.Because concrete shrinkage has the important effect of closing that causes to fissured generation, so come intelligence to regulate inside concrete humidity by intelligent shrinkage reducing agent, thereby realize fundamentally improving the purpose of concrete shrinkage, and then proposition improves the method for concrete weather resistance and security, therefore, the successful development of intelligent shrinkage reducing agent of the present invention will bring huge economic and social benefit.
The explanation of accompanying drawing table
Fig. 1 intelligent shrinkage reducing agent preparation technology schema;
The application art of Fig. 2 intelligent shrinkage reducing agent in concrete;
Fig. 3 intelligent shrinkage reducing agent is to the influence of concrete strength;
Fig. 4 intelligent shrinkage reducing agent is to the influence of concrete self-constriction.
Concrete embodiment
1, the preparation of intelligent shrinkage reducing agent
The intelligent shrinkage reducing agent preparation process is: with polyacrylamide, wilkinite, thunder holder stone, polypropylene is according to shown in following three embodiments, and be the sodium hydroxide solution proportion ingredient that the ratio of 1:1 adds 0.1mol/L in the mol ratio of polyacrylamide and sodium hydroxide, the solvent temperature of polymeric solution is controlled in 35 ℃, the using ultrasound wavelength-division technology of loosing makes polymeric solution realize fully dissolving and heat radiation in this process, after adding the polyether high molecular tensio-active agent then, the using ultrasound ripple is dispersing and dissolving once more, after adding phenolphthalein indicator, feed the hydrochloric acid of 0.1mol/L again, till solution no longer shows redness; Then with the polymers soln that obtains under 50～70 ℃, carry out the polyreaction of about 40min, cut into 1 centimetre of big fritter with obtaining intermediate product, adjusting temperature of oven then is 80 ℃, till drying to constant weight, then add rust inhibitor, stablizer and deionized water respectively, its consumption is respectively 0.02 of work in-process total amount, 0.03, after stirring, utilize colloidal mill to carry out superfine grinding again with 8 times, after the vibration swelling, make it pass through 100 purpose sieves, promptly get intelligent shrinkage reducing agent product of the present invention, its schema as shown in Figure 1.
Embodiment 1: intelligent shrinkage reducing agent of the present invention is made of 10% polyacrylamide (molecular-weight average 3,000,000), 7% polyether high molecular tensio-active agent (molecular-weight average 1600), 18% wilkinite, 50% thunder holder stone, 5% polypropylene (molecular-weight average 6000); Above per-cent is weight percentage.
Embodiment 2: intelligent shrinkage reducing agent of the present invention is made of 20% polyacrylamide (molecular-weight average 8,000,000), 2% polyether high molecular tensio-active agent (molecular-weight average 1000), 22% wilkinite, 44% thunder holder stone, 12% polypropylene (molecular-weight average 10000); Above per-cent is weight percentage.
Embodiment 3: intelligent shrinkage reducing agent of the present invention is made of 12% polyacrylamide (molecular-weight average 5,000,000), 5% polyether high molecular tensio-active agent (molecular-weight average 1300), 33% wilkinite, 42% thunder holder stone, 8% polypropylene (molecular-weight average 8000); Above per-cent is weight percentage.
2, the application of intelligent shrinkage reducing agent in concrete
Earlier the intelligent shrinkage reducing agent water is cooked carrier solvent during enforcement, it is saturated that fine grinding particle is absorbed water in advance, by the water absorption test in early stage, determines can obtain saturated gelinite when water absorbent rate is 140.At first add the proportioning of test shown in the table 1 medium sand, stone aggregate, add gelling material (cement and slag) behind the stirring 30s, together stir 30s.Add the saturated gel of suction and a part of mixing water again, adding surplus water and water reducer stir 90s jointly behind the stirring 60s, last placing dress mould.The application art of concrete intelligence economization agent in concrete as shown in Figure 2.
Table 1 concrete test proportioning
(1) according to the intelligent shrinkage reducing agent mechanism of action, utilize the high magnification water absorption character of intelligent shrinkage reducing agent self before mixing and stirring, soak in advance, make its suction saturated.
(2) in order to keep the original water-cement ratio of concrete, keep the original intensity of concrete, concrete actual used water amount is, the absorb water water yield of contained moisture in the saturated formation gelinite of the water consumption deduction intelligent shrinkage reducing agent in the proportioning.
(3) in order to improve aggregate and cement slurry interface structure, reach high performance purpose, concrete test adopts secondary to add the water conservancy project skill, is that the intelligent shrinkage reducing agent that will prepare adds with a part of mixing water earlier, adds remaining mixing water again after stirring 1min.With under identical water-cement ratio condition, this technology can reduce air content in the concrete, reduces bleeding, makes concrete structure more closely knit, and void distribution is more reasonable, and porosity further reduces.
(4) pass through concrete strength test, it is the 0.03-0.05wt% of binder total amount in the concrete that the intelligent shrinkage reducing agent of recommendation is suitable for volume.
3, concrete performance test result
(1) intensity
Concrete strength test carries out with reference to DL/T5150-2001 " concrete for hydraulic structure testing regulation ".
Fig. 3 test-results shows, be mixed with intelligent shrinkage reducing agent after, the intensity of different curing conditions and age concrete is not all had significantly influence.
(2) drying shrinkage
The concrete shrinkage test is carried out with reference to DL/T5150-2001 " concrete for hydraulic structure testing regulation ".
Table 2 concrete shrinkage test-results
Show that by table 2 test-results mix the concrete of intelligent shrinkage reducing agent and compare with blank sample (singly mixing the water reducer concrete), concrete 3d, 7d, 14d, 21d and 28d dry shrinkage per-cent are respectively: 74%, 77%, 81%, 85% and 86%.Singly mix the influence to the concrete shrinkage value of water reducer and intelligent shrinkage reducing agent by research, test-results shows that intelligent shrinkage reducing agent can be brought into play the effect that reduces the concrete shrinkage value effectively.
(3) self-constriction
The self-constriction test of clean slurry adopts fluid-discharge therapy to carry out, concrete testing sequence: gelling material and water are prepared into slurry by suitable proportion, (water-cement ratio is identical with concrete test control) puts into Glass tubing jolt ramming, with whiteruss Glass tubing is full of then, buret is inserted in the plug, with plug jam-pack bottleneck, and seal with paraffin, make liquid level rise to the highest scale place near buret at plug and bottleneck contact position.Instrument is placed standard curing room, treat promptly to can read the initial reading of liquid level behind the liquid level stabilizing.During beginning, record data are got short at interval, and can suitably get length later writing time at interval.
Fig. 4 test-results shows, be mixed with intelligent shrinkage reducing agent the concrete system volume change reduced, so owing to the mixing of intelligent shrinkage reducing agent, make concrete self-constriction be improved significantly.
Above concrete performance test result shows, mixes an amount of intelligent shrinkage reducing agent in concrete, can significantly reduce concrete shrinkage strain performance under the prerequisite of not obvious reduction concrete strength, thereby reaches the purpose that improves concrete durability.
Claims (8)
1. intelligent shrinkage reducing agent for concrete, mainly polyacrylamide, the polyether high molecular tensio-active agent of 2-7%, the wilkinite of 22-33%, the thunder holder stone of 42-50% and the polypropylene of 5-12% by the 10-20% of weight percent constitutes.
2. intelligent shrinkage reducing agent according to claim 1 is characterized in that: the molecular-weight average of polyacrylamide (300-800) * 10
4, the molecular-weight average 1000-1600 of polyether high molecular tensio-active agent, polyacrylic molecular-weight average 6000-10000.
3. the preparation method of claim 1 or 2 described intelligent shrinkage reducing agent for concrete, it is characterized in that: with polyacrylamide, wilkinite, thunder holder stone and polypropylene mix, and be that the ratio of 1:1-1:1.3 adds sodium hydroxide solution in the mol ratio of polyacrylamide and sodium hydroxide, add the polyether high molecular tensio-active agent then, with the ultrasonic dispersing dissolving evenly, after adding phenolphthalein indicator, feed hydrochloric acid again, till solution no longer shows redness, then with the polymers soln that obtains under 50-70 ℃, the polyreaction of carrying out 30-50min obtains intermediate product, cuts into 0.5-2 centimetre of big fritter with obtaining intermediate product, dries then to constant weight and gets work in-process, in work in-process, add rust inhibitor again, stablizer and deionized water, its consumption is respectively 0.02,0.03 and 8-10 times of work in-process total amount, after stirring, superfine grinding, after the vibration swelling, cross 100 mesh sieves, promptly get intelligent shrinkage reducing agent.
4. method according to claim 3 is characterized in that: the concentration of sodium hydroxide solution is 0.1mol/L, and the concentration of hydrochloric acid is 0.1mol/L.
5. claim 1 or the 2 described intelligent shrinkage reducing agent for concrete application in the preparation concrete.
6. purposes according to claim 5 is characterized in that: the intelligent shrinkage reducing agent volume is the 0.03-0.05wt% of gelling material in the concrete.
7. according to claim 5 or 6 described purposes, it is characterized in that: the add-on of concrete mixing water is the absorb water water yield of contained moisture in the saturated formation gelinite of concrete water consumption deduction intelligent shrinkage reducing agent in according to a conventional method.
8. according to claim 5 or 6 described purposes, it is characterized in that: prepare concrete technology for adopting secondary to add the concrete mixing water, the intelligent shrinkage reducing agent saturated formation gelinite that absorbs water is together added with concrete mixing water for the first time.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817655A (en) * | 2010-03-23 | 2010-09-01 | 清华大学 | Novel shrinkage reducing compacting agent special for concrete |
| CN102976692A (en) * | 2012-12-04 | 2013-03-20 | 武汉大学 | Ore-powder-doped high-performance shotcrete applicable to underground watertight oil cellars and preparation method thereof |
| CN104266939A (en) * | 2014-10-08 | 2015-01-07 | 重庆大学 | Method for quickly evaluating shrinkage reducing performance of concrete shrinkage reducing agent |
| CN105254334A (en) * | 2015-11-23 | 2016-01-20 | 河海大学 | Electrochemical preparation method of surface-hydrophobic concrete |
| CN106082758A (en) * | 2016-06-03 | 2016-11-09 | 徐州中联混凝土有限公司 | A kind of concrete economization agent and preparation method thereof |
| CN106927744A (en) * | 2017-03-31 | 2017-07-07 | 天津大学 | The self-healing method of high performance cement-based material inside microcrack |
| CN107572859A (en) * | 2017-08-31 | 2018-01-12 | 山东博发智能科技有限公司 | A kind of regeneration concrete economization agent and preparation method thereof |
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Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300198C (en) * | 2005-06-21 | 2007-02-14 | 重庆大学 | Polyacrylic acid salts shrinkage-reducing-agent and method for making same |
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2008
- 2008-09-24 CN CN2008101970620A patent/CN101367633B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817655A (en) * | 2010-03-23 | 2010-09-01 | 清华大学 | Novel shrinkage reducing compacting agent special for concrete |
| CN102976692A (en) * | 2012-12-04 | 2013-03-20 | 武汉大学 | Ore-powder-doped high-performance shotcrete applicable to underground watertight oil cellars and preparation method thereof |
| CN104266939A (en) * | 2014-10-08 | 2015-01-07 | 重庆大学 | Method for quickly evaluating shrinkage reducing performance of concrete shrinkage reducing agent |
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| CN106082758A (en) * | 2016-06-03 | 2016-11-09 | 徐州中联混凝土有限公司 | A kind of concrete economization agent and preparation method thereof |
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