CN110041007A - A kind of impervious marble powder composite blend and its application - Google Patents
A kind of impervious marble powder composite blend and its application Download PDFInfo
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- CN110041007A CN110041007A CN201910180976.4A CN201910180976A CN110041007A CN 110041007 A CN110041007 A CN 110041007A CN 201910180976 A CN201910180976 A CN 201910180976A CN 110041007 A CN110041007 A CN 110041007A
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- marble powder
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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
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention provides a kind of impervious marble powder composite blend and its application, the impervious marble powder composite blend, by weight, including following components: modified marble powder: 75~90 parts, modified metakaolin: 10~25 parts, rubber powder: 2~6 parts, basalt fibre: 0.5~1.5 part.Impervious marble powder composite blend of the invention passes through marble powder and metakaolin is modified, with rubber powder and basalt fibre it is compound after prepare concrete admixture, four synergistic effects substantially increase the reactivity of impervious marble powder composite blend and cement of the present invention, it is used for the preparation of concrete, it can form in inside concrete and fold staggered organic and inorganic three-dimensional interpenetrating polymer network structure, to substantially improve the pore size distribution$ of concrete, improve the density of concrete, so that made concrete mechanical property with higher and endurance quality.
Description
Technical field
The present invention relates to technical field of concrete, in particular to a kind of impervious marble powder composite blend.
Background technique
In recent years, as China's infrastructure quickly propels, the demand of concrete be increased dramatically, concrete admixture
Dosage is also increasing.However, high-quality mineral admixture inadequate resource and the unequal reason of Area distribution, common admixture
The present situation that (slag, flyash, volcanic ash etc.) is faced with resource scarcity, transportation cost increases, cause to occur concrete production at
The problems such as this height, deficiency in economic performance.In response to this, the new concrete mineral admixture of one kind is found to alleviate existing blending
Expect that the problem of shortage is imperative.
China's marble resource is abundant, is widely used, yield is huge, China's natural marble building board yield in 2015
Reach 3.35 hundred million square metres, so its exploitation accounts for about the waste material of former stone material 20%~50% with generation in process, its is levigate
The wasting of resources and problem of environmental pollution that marble industry faces can be solved by making concrete mineral admixture, while will push coagulation
The green and sustainable development of native industry.
Domestic and foreign scholars have conducted extensive research for marble powder concrete, the results showed that low in terms of physical mechanics
The marble powder of volume (10% or less generally) can improve the working performance of concrete, promote hydrated cementitious, improve concrete
Intensity, especially early strength.But with continuing growing for marble powder volume, concrete strength loss is larger.In durability
Aspect, impermeability are characterization concrete durability important indicators, and it is carbonization that agent on crack resistance of concrete can be improved in marble powder, but due to Dali
The increase of porosity and pore-size in concrete of stone powder, so concrete impermeability is declined；Meanwhile electric flux with
Marble powder volume increases and increases, and also results in the decline of its Anti-Chloride Ion Penetration.
To sum up, marble powder can be smaller with volume in concrete at present, while being unfavorable for the anti-permeability performance of concrete, from
And limit being widely used for marble powder.For this reason, it is necessary to propose a kind of marble powder complex mineral blending material, it is good in guarantee
Under the premise of good work and mechanical property, concrete durability is improved.
Summary of the invention
In view of this, the present invention is directed to propose a kind of impervious marble powder composite blend, to solve existing marble
Powder utilization rate is low, and the problem of its application effect difference in concrete.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of impervious marble powder composite blend, by weight, including following components:
Modified marble powder: 75~90 parts,
Modified metakaolin: 10~25 parts,
Rubber powder: 2~6 parts,
Basalt fibre: 0.5~1.5 part.
Optionally, the modified marble powder is that marble powder is made through exciting agent is modified.
Optionally, the method for modifying of the modified marble powder, comprising the following steps:
The excitation agent solution that compound concentration is 50%；
Using fluidized bed~chemical vapour deposition technique, the excitation agent solution after atomization is uniformly wrapped in marble powder
Surface, then, by drying, being crushed, be sieved to get modified marble powder.
Optionally, the exciting agent accounts for the 1~3% of the marble powder total amount.
Optionally, the exciting agent includes anhydrous sodium sulphate, soda ash, triisopropanolamine；It is the anhydrous sodium sulphate, the soda ash, described
The mass ratio of triisopropanolamine is (55~65): (35~40): (1~3).
Optionally, the modified metakaolin is that metakaolin is made through silane coupler modified.
Optionally, the modified metakaolin method of modifying the following steps are included:
Silane coupling agent is configured to the dilution that mass concentration is 1.5~3% with dehydrated alcohol；
Metakaolin is immersed in the dilution, stirs and then water bath with thermostatic control heating is filtered, natural air drying, i.e.,
Metakaolin must be modified.
Optionally, the rubber powder is redispersible vinyl acetate~ethylene copolymer rubber powder.
Another object of the present invention is to provide a kind of above-mentioned impervious marble powder composite blends in concrete
Using concrete described in the application includes cement；The impervious marble powder composite blend equivalent replaces 15~30%
The cement.
Compared with the existing technology, impervious marble powder composite blend of the present invention has the advantage that
1, impervious marble powder composite blend of the invention is by modified by marble powder and metakaolin, with glue
Concrete admixture is prepared after powder and basalt fibre are compound, because modified marble powder has very high activity, and is changed
Property after the reuniting effect of metakaolin be effectively reduced, meanwhile, basalt fibre can inside concrete be formed it is three-dimensional disorderly
To distributed network system, fiber-bridging effect is played, and rubber powder can form polymer gel with hydrated cementitious, filling concrete stone is empty
Gap, four synergistic effects substantially increase the reactivity of impervious marble powder composite blend and cement of the present invention, by it
For the preparation of concrete, it can be formed in inside concrete and fold staggered organic and inorganic three-dimensional interpenetrating polymer network structure, thus
The pore size distribution$ for substantially improving concrete improves the density of concrete, so that made concrete power with higher
Learn performance and endurance quality.
2, impervious marble powder composite blend of the invention is using modified marble powder and modified metakaolin compounding
The method of rubber powder and basalt fibre compounding is made, wherein modified marble powder and modified metakaolin all have good shape
State effect and filling effect are used for the preparation of concrete, can optimised coagulation soil in cementitious material gradation, to be conducive to
The pore structure for further improving concrete, improves the compactness of concrete, and then be conducive to further increase made concrete
Mechanical property and endurance quality.
3, impervious marble powder composite blend of the invention is to be modified marble powder as primary raw material, and volume is at this
Ratio in the impervious marble powder composite blend of invention is up to 85% or more, by impervious marble powder of the invention
Composite blend is used for the preparation of concrete, to the substitution amount of cement up to 30%, i.e. benefit of the marble powder in concrete
With rate up to 25% or more, the high value added utilization problem of marble powder is not only solved, it is avoided to pollute the environment, and
And the problem of being conducive to Concrete Industry resource scarcity.
Specific embodiment
Marble powder has good shape effect and filling effect, can significantly improve working performance of concrete, but it is lived
Property it is lower, be unfavorable for concrete strength development, limit its application in concrete；Metakaolin is that a kind of sial is amorphous
Active material can occur pozzolanic reaction with hydrolysis product of cement and generate gel, improve concrete strength, but its surface can be compared with
Greatly, easy to reunite and water requirement is larger, unfavorable to working performance of concrete；Basalt fibre and concrete have natural compatibility,
Preferably, evenly dispersed basalt fibre is internal in concrete to form three-dimensional random distribution network body to dispersibility in concrete
System, play fiber-bridging effect, can support aggregate and run through microcrack, effectively prevent microcrack develop, raising coagulation
The impervious cracking resistance of soil；Redispersable latex powder dissolves in water forms polymer emulsion, with the progress of hydrated cementitious, polymerization
Object gel is gradually filled in Behavior of Hardened Cement Paste hole and forms one layer of polymeric film, while active group can be with aquation in polymer
Staggered three-dimensional net structure is folded in product reaction, formation, is improved cement and is gathered materials, fibres bond power, and interface knot is improved
It closes, effectively inhibits the development of micro-crack, improve concrete impermeability.The present invention is based on this, to marble powder and higher ridge
After soil is modified, compounds basalt fibre and redispersable latex powder prepares impervious marble powder composite blend, to mention
High marble powder application effect in concrete, and then improve its utilization rate in concrete.
Wherein, in the present invention, in order to improve the activity of marble powder and metakaolin, the specific surface area of marble powder is excellent
It is selected as not less than 600m2/ kg, D50 are preferably not greater than 10 μm, SiO in metakaolin2With Al2O3Mass percentage is preferred
For not less than 95%, surface area is preferably not less than 1350m2/ kg, and it is good in order to have basalt fibre in concrete
Dispersion effect, the filament diameter of basalt fibre is preferably 13~16 μm, and draw ratio is preferably greater than 1000, and elasticity modulus is excellent
It is selected as being greater than 95GPa, fracture elongation is preferably not less than 2%.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
Below in conjunction with embodiment, the present invention will be described in detail.
Embodiment 1
A kind of impervious marble powder composite blend (M I), by weight, including following components:
Modified marble powder: 75 parts,
Modified metakaolin: 25 parts,
Rubber powder: 3 parts,
Basalt fibre: 1 part.
Wherein, rubber powder is redispersible vinyl acetate~ethylene copolymer rubber powder, and solid content is greater than 98%；Basalt is fine
The filament diameter filament diameter of dimension is preferably 15 μm, and length is preferably 18mm, and elasticity modulus is preferably greater than 95GPa, and fracture is prolonged
The rate of stretching is preferably not less than 2%.
In the present embodiment, the method for modifying of modified marble powder, comprising the following steps:
The excitation agent solution that compound concentration is 50% in excusing from death disperser, wherein prepare the exciting agent of excitation agent solution
Including anhydrous sodium sulphate, soda ash, triisopropanolamine；Anhydrous sodium sulphate, soda ash, triisopropanolamine mass ratio be 60: 38: 2；
Using fluidized bed~chemical vapour deposition technique, in fluidized bed uniformly by the excitation agent solution after atomizer is atomized
It is wrapped in marble powder surface, then, collects powder, and the powder of collection is dried, is crushed, is sieved to get modified big
Fibrous gypsum powder, wherein exciting agent accounts for the 1% of marble powder total amount, and the specific surface area of marble powder is preferably 667m2/ kg, D50 are excellent
It is selected as 8.52 μm.
In the present embodiment, it carries out surface to marble powder by fluidized bed~chemical vapour deposition technique to be modified, exciting agent
It is evenly coated at marble powder surface, forms nano-modified layer, marble powder activity can be effectively improved, to improve cement slurry
It can be with activity SiO in metakaolin in body2With active Al2O3The Ca (OH) of pozzolanic reaction occurs2Amount, and then be conducive to increase
Add the production quantity that the CSH and CASH isogel of concrete pore can be filled in concrete, to improve the mechanical property of concrete
And endurance quality, meanwhile, anhydrous sodium sulphate, triisopropanolamine have good early strong effect in exciting agent, hydrated cementitious can be promoted, into
And hydrated product production quantity is further increased, to further increase the mechanical property and endurance quality of concrete.
Moreover, in the present embodiment, the method for modifying of modified metakaolin the following steps are included:
Silane coupling agent is configured to the dilution that mass concentration is 3% with dehydrated alcohol；
Metakaolin is immersed in dilution, then, is placed in 40 DEG C of thermostatic water baths, and after moderate-speed mixer 45min,
Filtering, natural air drying is to get modified metakaolin, wherein the specific surface area of metakaolin is 1350 m2/kg。
In the present embodiment, metakaolin is modified with silane coupling agent, can effectively reduce the reunion of metakaolin
Effect improves itself and hydrated product Ca (OH) in concrete2Pozzolanic reaction efficiency, and then improve concrete mechanical property
And endurance quality, and the improvement of the reuniting effect of metakaolin can reduce its water requirement, and then improve the working performance of concrete,
Meanwhile in metakaolin aquation, because of the water-wet behavior of silane coupling agent, the volcano of metakaolin and cement can further improve
Grey reaction efficiency, in addition, silane coupling agent can enhance maturing particle binding ability, so as to improve concrete mechanics
Energy.
Embodiment 2
The difference of the present embodiment and above-described embodiment is: the impervious marble powder composite blend (M of the present embodiment
, by weight, including following components II):
Modified marble powder: 83 parts,
Modified metakaolin: 17 parts,
Rubber powder: 4 parts,
Basalt fibre: 0.5 part.
In the modifying process of marble powder, exciting agent accounts for the 1.5% of marble powder total amount.
In the modifying process of metakaolin, silane coupling agent is configured to the dilution that mass concentration is 2% with dehydrated alcohol
Liquid.
Embodiment 3
The difference of the present embodiment and above-described embodiment is: the impervious marble powder composite blend (M of the present embodiment
, by weight, including following components III):
Modified marble powder: 90 parts,
Modified metakaolin: 10 parts,
Rubber powder: 6 parts,
Basalt fibre: 1.5 parts.
In the modifying process of marble powder, exciting agent accounts for the 3% of marble powder total amount.
In the modifying process of metakaolin, with dehydrated alcohol by silane coupling agent be configured to mass concentration be 1.5% it is dilute
Release liquid.
Impervious marble powder composite blend application effect in concrete of Examples 1 to 3 is tested, and will
The marble powder composite blend of itself and comparative example compares, wherein in the marble powder composite blend (DM) of comparative example
Marble powder and metakaolin are non-modified, and each raw material proportioning is the same as embodiment 1.Using the impervious Dali of Examples 1 to 3
In mountain flour composite blend and comparative example marble powder composite blend prepare concrete match ratio it is as shown in table 1.In table 1
Cement is 42.5 grades of PO, and sand is sand in II section, and fineness modulus 2.4, rubble is 5-25mm continuous grading, water-reducing agent
The polycarboxylate water-reducer for being 20% for solid content.
Table 1
It is " mixed according to GB/T 50080-2016 " concrete mixture characteristic test method " and GB/T 50081-2016
Solidifying soil mechanics method for testing performance ", the mechanical property and endurance quality of concrete in table 1 are tested, test result is as shown in table 2.
Table 2
As shown in Table 2, compared to singly mixing marble powder (blank 2), the admixture of 1~embodiment of embodiment 3 prepares coagulation
The slump of soil, concrete mix slightly reduces, but still the slump of the concrete mix of significantly larger than blank 1, explanation
The admixture of 1~embodiment of embodiment 3 can significantly improve working performance of concrete.Compared with the admixture of comparative example, embodiment 1
The admixture activity of~embodiment 3 is higher, and each age strength development of the concrete prepared is more preferable, and even more than blank group is strong
Degree.
According to coagulation in GBT50082-2009 " Standard for test methods of longterm performance and durability of ordinary concrete " test table 1
Deformation performance (drying shrinkage), the anti-permeability performance of soil, test result are as shown in table 3.
Table 3
As shown in Table 3, the admixture for adding 1~embodiment of 15-30% embodiment 3 can reduce concrete drying shrinkage rate,
Improve concrete impermeability.Compared to the admixture of comparative example, the admixture of 1~embodiment of embodiment 3 is guaranteeing concrete
Under the premise of working performance and mechanical property, concrete drying shrinkage rate is significantly reduced, it is concrete impervious to improve marble powder
Performance is insufficient.The concrete impervious grade of 1~embodiment of embodiment 3 reaches P10 or more, concrete impervious compared to blank group
Coefficient reduces 30-70%.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of impervious marble powder composite blend, which is characterized in that by weight, including following components:
Modified marble powder: 75~90 parts,
Modified metakaolin: 10~25 parts,
Rubber powder: 2~6 parts,
Basalt fibre: 0.5~1.5 part.
2. impervious marble powder composite blend according to claim 1, which is characterized in that the modified marble powder
It is made for marble powder through exciting agent is modified.
3. impervious marble powder composite blend according to claim 2, which is characterized in that the modified marble powder
Method of modifying, comprising the following steps:
The excitation agent solution that compound concentration is 50%；
Using fluidized bed-chemical vapour deposition technique, the excitation agent solution after atomization is uniformly wrapped in marble powder surface,
Then, by drying, being crushed, be sieved to get modified marble powder.
4. impervious marble powder composite blend according to claim 2 or 3, which is characterized in that the exciting agent accounts for
The 1~3% of the marble powder total amount.
5. impervious marble powder composite blend according to claim 4, which is characterized in that the exciting agent includes member
Bright powder, soda ash, triisopropanolamine；The anhydrous sodium sulphate, the soda ash, the triisopropanolamine mass ratio be (55~65): (35
~40): (1~3).
6. impervious marble powder composite blend according to claim 1, which is characterized in that the modified metakaolin
It is made for metakaolin through silane coupler modified.
7. impervious marble powder composite blend according to claim 6, which is characterized in that the modified metakaolin
Method of modifying the following steps are included:
Silane coupling agent is configured to the dilution that mass concentration is 1.5~3% with dehydrated alcohol；
Metakaolin is immersed in the dilution, is stirred and water bath with thermostatic control heating, then, filtering, natural air drying is to get changing
Property metakaolin.
8. impervious marble powder composite blend according to claim 1, which is characterized in that the rubber powder is to divide again
Dissipate vinyl acetate-ethylene copolymer rubber powder.
9. application of the impervious marble powder composite blend described in any item of the claim 1 to 8 in concrete, special
Sign is that the concrete includes cement；The impervious marble powder composite blend equivalent replace 15~30% it is described
Cement.
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| CN112194403A (en) * | 2020-10-10 | 2021-01-08 | 厦门安能建设有限公司 | Additive, preparation method thereof and composite cement paste for improving impermeability of weak soil |
| CN114804717A (en) * | 2022-03-31 | 2022-07-29 | 湖北工业大学 | Sulfate-corrosion-resistant waterproof mortar and preparation method thereof |
| CN115849764A (en) * | 2022-11-25 | 2023-03-28 | 四川沃庆新材料科技有限公司 | Sprayed concrete admixture and preparation method and application thereof |
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| CN114804717A (en) * | 2022-03-31 | 2022-07-29 | 湖北工业大学 | Sulfate-corrosion-resistant waterproof mortar and preparation method thereof |
| CN115849764A (en) * | 2022-11-25 | 2023-03-28 | 四川沃庆新材料科技有限公司 | Sprayed concrete admixture and preparation method and application thereof |
| CN115849764B (en) * | 2022-11-25 | 2023-10-27 | 四川沃庆新材料科技有限公司 | Sprayed concrete admixture and preparation method and application thereof |
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| CN110041007B (en) | 2022-04-01 |
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