CN100594194C - Uses of macromolecule water uptake-protection material as concrete anticracking agent - Google Patents
Uses of macromolecule water uptake-protection material as concrete anticracking agent Download PDFInfo
- Publication number
- CN100594194C CN100594194C CN200810048191A CN200810048191A CN100594194C CN 100594194 C CN100594194 C CN 100594194C CN 200810048191 A CN200810048191 A CN 200810048191A CN 200810048191 A CN200810048191 A CN 200810048191A CN 100594194 C CN100594194 C CN 100594194C
- Authority
- CN
- China
- Prior art keywords
- concrete
- water
- cracking
- agent
- macromolecule
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
-
- 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
- C04B2103/0045—Polymers chosen for their physico-chemical characteristics
- C04B2103/0051—Water-absorbing polymers, hydrophilic polymers
-
- 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
- C04B2103/44—Thickening, gelling or viscosity increasing agents
- C04B2103/445—Gelling agents
-
- 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
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
Landscapes
- 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 an application of a macro molecule water absorbing and retaining material used as a concrete anti-cracking agent. In the invention, the macro molecule water absorbing and retaining material is used as the concrete anti-cracking agent, under the condition of not damaging the strength of concrete, the shrinkage distortion performance of the concrete is obviously reduced, andthe aim of preventing the cracking of the concrete is achieved. The macro molecule water absorbing and retaining material used as the concrete anti-cracking agent can directly supply humidity to theinner part of the concrete, effectively control the generation of self shrinkage, maximally hydrate the cement and solve the problem of self dry of the concrete; moreover, because particles of the material have the characteristics of small fineness, easy dissipation and strong water absorption, etc., the characteristics are utilized to quantitatively control the doped quantity of self curing compositions and further control the content of hydration water so as to achieve the aim of staged self curing and meet requirements of quick and convenient construction and structural anti-cracking. In the invention, the macro molecule water absorbing and retaining material is used to regulate the internal humidity of the concrete so as to improve the shrinkage and further improve the durability and safety of the concrete.
Description
Technical field
The invention belongs to civil engineering material technical field, be specifically related to the purposes of macromolecule water uptake water-keeping material as the anti-cracking concrete agent.
Background technology
The concrete works weather resistance is the key subjects that international project circle is paid close attention to, and the whole world is because economy and social loss that concrete forfeiture weather resistance causes are very huge.Study on durability is more and more emphasized in the development of modern concrete technology.Modern concrete is on the production technique and starting material bases such as cement, sandstone of routine, improve microtexture and interfacial transition zone by admixture efficient additive and mineral admixture (as silica flour, ground slag, flyash etc.), reach the purpose that improves weather resistance.Compare with conventional concrete, modern concrete has following advantage: intensity is higher thereby scantlings of the structure is littler, and this just makes, and dead load alleviates, usable floor area increases, material usage reduces; Young's modulus is higher, thereby structural distortion is littler, rigidity is bigger, stability is better; The endurance quality height, thereby the maintenance of structure and reconstruction expenses are few, working life prolongs significantly.
Yet some national paper is pointed out the fissility of modern concrete in recent years.No matter be in practical engineering application, find all in testing laboratory that still modern concrete generally has the trend that infant cracking takes place, and after the volatilization and variation of temperature of taking common measure control moisture, still can not eliminate the generation of crackle well.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.The self-constriction here is meant because inside concrete relative humidity reduces with the progress of aquation and then cause in the pore moisture unsaturated and produce the concrete shrinkage that negative pressure causes thus.To being in the concrete member under the constraint condition, be contracted in its inner stress that produces, when stress surpasses drag, cause concrete cracking.Engineering practice shows, although the total contraction of modern concrete is big unlike conventional concrete, but because more the contraction occurs in early days, the contraction of modern concrete and cracking problem have become problem general and serious in the engineering practice, even under the conservation system of strictness, crack on concrete also happens occasionally, thereby has weakened concrete weather resistance.How to improve the modern concrete splitting resistance, guarantee its service life, become a focus of current concrete research.
Address the above problem, the measure that prior art adopts mainly contains:
Extraneous water supply maintenance.Provide the private water supply maintenance to compare with the macromolecule water uptake water-keeping material, extraneous water supply maintenance not only will consume certain manpower and materials, and maintenance quality is also unstable, and for modern concrete, extraneous water supply maintenance can't be gone beyond its fine and close structural sheet, and maintenance moisture can not effectively be provided, and for on-the-spot beam column member, its outside water supply maintenance exists limitation again, causes the concrete pouring deficiency, therefore can't satisfy the needs that the modern concrete performance improves.
Liquid film forming curing agent curing concrete.This method is the liquid film forming curing agent of concrete surface spraying one deck in new moulding, along with the volatilization of solvent, forms the fluid-tight sealing membrane of one deck gradually, makes that concrete is unlikely to lose too many moisture, reaches the purpose of maintenance.It is not subjected to the restriction of workyard, structural shape, and easy construction can remedy the limitation of water ponding, but the concrete pouring effect that this method is big for surface-area and water cement ratio is little is relatively poor, and for water curing, its intensity and performance decrease.Liquid in addition film forming curing agent is merely able to water conservation, and water retention property determines by the stopping property the subject of knowledge and the object of knowledge of material, can not supply water for the aquation of modern concrete to solve the problem of water deficient.
Economization agent improves concrete shrinkage.This method is to add a kind of surfactant that has in concrete, when concrete because dry and when in pore, forming capillary tension and making concrete shrinkage, because of the existence of economization agent makes capillary tension descend, thereby make concrete macroscopical shrinkage value reduce.Because the major cause of dry shrinkage of concrete and self-constriction all is capillary tensions, so economization agent for concrete all has certain effect to reducing dry shrinkage of concrete and contracting certainly.The subject matter that this method exists is and concrete material system such as cement, and the adaptability problem between the water reducer etc. is compared with the macromolecule water uptake water-keeping material simultaneously, and its cost is higher, has limited the popularization and the use of economization agent.
Fiber reinforcement is by improving concrete resistance to tension.This method is added fiber in the concrete material system, by its physical mechanics effect, stop the development of tiny crack, consumes internal stress, and correspondingly promotes coagulation soil cracking consequence and carry power and flexible effect, thereby improves crack on concrete.Compare with the macromolecule water uptake water-keeping material, the fiber reinforcement technology the dispersed of fiber and with the adhesive aggregation of cement slurry on still have certain problem, application cost is also bigger simultaneously.
The macromolecule water uptake water-keeping material that the present invention relates to is a kind of water to be had special adsorbing polymer composite, 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.This specific function makes the absorbent polymer gelatinous material develop rapidly after being found just.In industrial or agricultural fields such as health care, agricultural gardening, daily-use chemical industry and environment protection, obtained widespread use at present.The major ingredient of this macromolecule water uptake water-keeping material is polyacrylamide (10-20%), polyether high molecular tensio-active agent (2-7%), wilkinite (22-33%), thunder holder stone (42-50%), polypropylene (5-12%) etc., main through stirring fast, 50～70 ℃ of temperature range polymerizations, last levigated production technique and obtaining.
The applicant finds that the macromolecule water uptake water-keeping material when keeping other performance of original concrete, can effectively improve the concrete shrinkage performance as anticracking agent, thereby improves concrete splitting resistance.
Summary of the invention:
The object of the present invention is to provide the macromolecule water uptake water-keeping material as anti-cracking concrete agent (Anti CrackingAdmixture, abbreviation ACA) purposes, when keeping other performance of original concrete, can effectively improve the concrete shrinkage performance, thereby improve concrete splitting resistance.
For realizing purpose of the present invention, technical scheme provided by the invention is: the macromolecule water uptake water-keeping material is as the purposes of concrete anticracking agent.
According to the present invention, with the macromolecule water uptake water-keeping material levigate to particle diameter be 80-150 purpose particle, in water, be dipped to then the suction the saturated gelinite that obtains; In the concrete preparation process, gelinite and concrete mixing water are together added.
The volume of above-mentioned macromolecule water uptake water-keeping material is the 0.03-0.05wt% of gelling material in the concrete.
According to the present invention, the add-on of concrete mixing water is the contained water yield in the concrete water consumption deduction gelinite in according to a conventional method in the use.
According to the present invention, prepare concrete technology for adopting secondary to add the concrete mixing water, gelinite and concrete mixing water are for the first time together added.
Described macromolecule water uptake water-keeping material is obtained for feedstock production by the polyacrylamide (molecular-weight average 300-800 ten thousand) of the 10-20% of weight percent, the polyether high molecular tensio-active agent (molecular-weight average 1000-1600) of 2-7%, the wilkinite of 22-33%, the thunder holder stone of 42-50%, the polypropylene (molecular-weight average 6000-10000) of 5-12%.
The present invention adopts the macromolecule water uptake water-keeping material as the anti-cracking concrete agent, under the prerequisite of not damaging concrete strength, significantly reduces concrete shrinkage strain performance, reaches the purpose of anti-cracking concrete.
The macromolecule water uptake water-keeping material can have been controlled the generation of self-constriction directly in inside concrete supply humidity effectively as the anti-cracking concrete agent, also makes cement obtain maximum aquation, solves concrete self-desiccation problem.Can also utilize characteristics such as little, the easy dispersion of its particle fineness, strong absorptive quantitatively to control addition content, and then control aquation moisture content realize that stage by stage from the purpose of maintenance, it is fast and convenient to reach construction, the implementation structure demand of anti-crack from the maintenance component.
Because concrete shrinkage has the important effect of closing that causes to fissured generation, the present invention regulates inside concrete humidity by the macromolecule water uptake water-keeping material and reaches the improvement contraction, thereby improve the method for concrete weather resistance and security, have important economy and social value.
Description of drawings
Fig. 1 is that macromolecule water uptake water-keeping material of the present invention is as the application art of anti-cracking concrete agent in concrete.
Fig. 2 is the influence of macromolecule water uptake water-keeping material to mortar strength.
Fig. 3 is the influence of macromolecule water uptake water-keeping material to concrete strength.
Fig. 4 is the influence of macromolecule water uptake water-keeping material to the concrete self-constriction.
Concrete embodiment:
Mainly preparing of the macromolecule water uptake water-keeping material that the present invention relates to by the polyacrylamide (molecular-weight average 300-800 ten thousand) of the 10-20% of weight percent, the polyether high molecular tensio-active agent (molecular-weight average 1000-1600) of 2-7%, the wilkinite of 22-33%, the thunder holder stone of 42-50%, the polypropylene (molecular-weight average 6000-10000) of 5-12%.
Its preparation process is: polyacrylamide, polyether high molecular tensio-active agent, wilkinite, thunder holder stone, polypropylene are mixed at 50～70 ℃ stirred 20-40 minute, levigate then to granularity be the 60-80 order, sub-water-absorbing-retaining material promptly secures satisfactory grades.
As shown in Figure 1:
The present invention adopts above-mentioned macromolecule water uptake water-keeping material as anticracking agent, and elder generation is with the levigate fine particle that obtains of anticracking agent coarse particles during enforcement.Water is cooked carrier solvent, makes the pre-suction of fine grinding particle saturated, and water absorbent rate is defined as 1: 140 by water absorption test, obtains the saturated gel of suction.Input drops into gelling material (cement, flyash) through sand, the stone aggregate of metering behind the stirring 30s, together stirs 30s.Drop into the saturated gel of suction and a part of mixing water again, input surplus water and water reducer stir 90s jointly behind the stirring 60s, last placing dress mould.Concrete material input amount sees Table 1.
Table 1 concrete mix
(1) consider that anticracking agent adds after, it is the remaining a part of hole of meeting after inside concrete discharges moisture, in order to reduce the anticracking agent residual porosity to the issuable disadvantageous effect of concrete performance, before use should be in advance that the anticracking agent particle is levigate as far as possible, form fine particle.Take all factors into consideration effect and operating procedure grain diameter is set 120 orders.
(2) according to the anticracking agent mechanism of action, utilize the high magnification water absorption character of himself before mixing and stirring, soak in advance, make its suction saturated.
(3) the actual moisture that adds should be deducted moisture contained in the anticracking agent gel in the use, keeps water-binder ratio, keeps the original intensity of concrete.
(4) 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.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.
(5) anticracking agent after the suction forms gel, in concrete formation, together adds with the mixing water that adds for the first time.
(6) pass through concrete strength test, it is 0.04% that the anticracking agent of recommendation is suitable for volume, and the volume here is meant that the anticracking agent solid particulate of not suction accounts for the mass ratio of gelling material.
The concrete performance test result, agent has good effect as anti-cracking concrete to show use macromolecule water uptake water-keeping material.
(1) intensity
The mortar strength test is used for reference GB/T17671-1999 " Test method for strength of hydraulic cement mortar " and is carried out.
Find out that by Fig. 2 intensity all can keep or reduce and is no more than 5% when being mixed with the different curing conditions of intensity of mortar behind the ACA and the length of time.
Concrete strength test carries out according to DL/T5150-2001 " concrete for hydraulic structure testing regulation ".
Find out by Fig. 3, be mixed with that concrete intensity when difference is supported the length of time all can keep same level or reduction to be no more than 5% behind the ACA.
(2) drying shrinkage
Concrete strength test carries out according to DL/T5150-2001 " concrete for hydraulic structure testing regulation "
Table 2 concrete shrinkage test-results
Table 2 shows: the concrete that is mixed with ACA is compared with normal concrete, and concrete 3d, 7d, 14d and 28d dry shrinkage per-cent are respectively: 77%, 73%, 80% and 89%.
(3) self-constriction
Fluid-discharge therapy is adopted in clean oar self-constriction, test method: get suitable proportion cement, water is prepared into slurry, (water-cement ratio is identical with concrete test) 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 plug and bottleneck contact position sealed with paraffin, make liquid level rise to the highest scale place near buret.Instrument is placed standard curing room, treat promptly to can read the liquid level initial reading behind the liquid level stabilizing.During beginning, record data are got short at interval, and can suitably get length later writing time at interval.
As seen from Figure 4, the system volume change that is mixed with ACA reduces, and self-constriction obviously improves.
(4) cracking
Adopt under the restricted condition, estimate concrete shrinkage cracking behavior.The mortar incipient crack time of occurrence that uses the elliptical ring constraint split test after improving to retrain with the computer real-time monitoring elliptical ring, fully vibrate during the sample moulding to get rid of air pocket, sample after the moulding is maintenance 18h under moist curing condition, slough the sample external mold then, at last, sample is placed on (20 ± 3) ℃, dry maintenance in the kiln of relative humidity (60 ± 5) %.
Test-results shows: be mixed with the system of ACA, the incipient crack time of occurrence extended to 137.5 hours by 122.42 hours, and mixing of visible ACA reduced early-age shrinkage cracking possibility effectively.
Claims (5)
1. the macromolecule water uptake water-keeping material is as the purposes of concrete anticracking agent; Described macromolecule water uptake water-keeping material is that feedstock production obtains by the polypropylene of the molecular-weight average 6000-10000 of the thunder holder stone of the wilkinite of the polyether high molecular tensio-active agent of the molecular-weight average 1000-1600 of the polyacrylamide of the molecular-weight average 300-800 ten thousand of the 10-20% of weight percent, 2-7%, 22-33%, 42-50%, 5-12%.
2. purposes according to claim 1 is characterized in that: with the macromolecule water uptake water-keeping material levigate to particle diameter be 80-150 purpose particle, in water, be dipped to then the suction the saturated gelinite that obtains; In the concrete preparation process, gelinite and concrete mixing water are together added.
3. purposes according to claim 2 is characterized in that: the volume of macromolecule water uptake water-keeping material is the 0.03-0.05wt% of gelling material in the concrete.
4. purposes according to claim 2 is characterized in that: the add-on of concrete mixing water is the contained water yield in the concrete water consumption deduction gelinite in according to a conventional method in the use.
5. according to claim 2 or 3 or 4 described purposes, it is characterized in that: prepare concrete technology for adopting secondary to add the concrete mixing water, gelinite and concrete mixing water are for the first time together added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810048191A CN100594194C (en) | 2008-06-26 | 2008-06-26 | Uses of macromolecule water uptake-protection material as concrete anticracking agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810048191A CN100594194C (en) | 2008-06-26 | 2008-06-26 | Uses of macromolecule water uptake-protection material as concrete anticracking agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101318786A CN101318786A (en) | 2008-12-10 |
| CN100594194C true CN100594194C (en) | 2010-03-17 |
Family
ID=40179094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810048191A Expired - Fee Related CN100594194C (en) | 2008-06-26 | 2008-06-26 | Uses of macromolecule water uptake-protection material as concrete anticracking agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100594194C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101775801B (en) * | 2010-02-10 | 2011-04-13 | 温州大学 | Novel self maintenance cement soil pile |
| CN101851078B (en) * | 2010-05-14 | 2012-09-19 | 广东红墙新材料股份有限公司 | Curing agent in concrete and preparation method and use method thereof |
| CN102390951A (en) * | 2011-08-10 | 2012-03-28 | 中国铁道科学研究院铁道建筑研究所 | Internal curing material of high-performance concrete and preparation method thereof |
| CN103321120A (en) * | 2012-03-17 | 2013-09-25 | 刘祖学 | Moisture-retaining pavement |
| CN102633456B (en) * | 2012-05-15 | 2013-06-26 | 河南理工大学 | Heavy-weight concrete internal curing material and preparation method thereof |
| CN104764873B (en) * | 2015-03-11 | 2016-04-20 | 同济大学 | A kind of assay method of agent on crack resistance of concrete shrinkage |
| CN107010864B (en) * | 2017-03-20 | 2020-07-14 | 江苏超力建材科技有限公司 | Concrete water slow-release agent and preparation method and use 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 |
| CN109081650B (en) * | 2018-07-20 | 2021-08-03 | 广东汉石新材料科技有限公司 | Natural-like artificial stone and preparation method thereof |
| CN111620617A (en) * | 2020-04-24 | 2020-09-04 | 山东大学 | Ultrahigh-performance cement-based composite material for sensor, sensor and preparation method |
-
2008
- 2008-06-26 CN CN200810048191A patent/CN100594194C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101318786A (en) | 2008-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100594194C (en) | Uses of macromolecule water uptake-protection material as concrete anticracking agent | |
| CN104591620B (en) | Lightweight aggregate concrete suitable for high remote pumping | |
| CN101367633B (en) | Intelligent shrinkage reducing agent for concrete, preparation method and application thereof | |
| CN104016617B (en) | A concrete reinforcing agent and a preparing method thereof | |
| CN110550913B (en) | Impervious concrete and preparation process thereof | |
| CN104973835B (en) | Concrete repair modified cement slurry and preparation method thereof | |
| CN109020437A (en) | A kind of new and effective spraying glass bead lightweight plastering gupsum mortar | |
| CN111423759B (en) | Exterior wall waterproof putty and preparation method thereof | |
| CN108328977B (en) | Concrete repairing material | |
| CN107555835A (en) | It is a kind of to improve and maintain the additive and preparation method of pervious concrete workability | |
| CN104310831A (en) | Water-resisting potassium phosphate magnesium cement and preparation method thereof | |
| CN113003999A (en) | Synchronous grouting slurry for shield construction of water-rich stratum and preparation method thereof | |
| CN109020436A (en) | A kind of new and effective spraying heavy scratch coat gypsum mortar | |
| CN105130314B (en) | Modification cement slurry for fast repairing concrete | |
| CN105646767B (en) | A kind of concrete super absorbent resin epoxy-type Self-curing material and preparation method | |
| CN109721321A (en) | A kind of preparation method of ardealite based self-leveling material | |
| CN113501696A (en) | Environment-friendly anti-permeability concrete and preparation method thereof | |
| CN108751811B (en) | Preparation method of concrete without negative strength influence and high internal curing efficiency | |
| CN107628790A (en) | A kind of decoration cement | |
| Geng et al. | Applicability of rheological properties of superabsorbent polymer cement-based materials using apparent viscosity | |
| CN114315216B (en) | Concrete anti-dispersant and application thereof in concrete | |
| CN110482969A (en) | A kind of permeable concrete and preparation method thereof | |
| CN104973837A (en) | C50-grade curing-free concrete and composite concrete pavement thereof | |
| CN104829172B (en) | A kind of walling is wiped one's face with dry-mixed material | |
| CN109574700A (en) | A kind of dispersion fibrous foam concrete and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100317 Termination date: 20110626 |