CN108516719A - Concrete waterproofer, waterproofing agent preparation method and water-proof concrete - Google Patents
Concrete waterproofer, waterproofing agent preparation method and water-proof concrete Download PDFInfo
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- CN108516719A CN108516719A CN201810555947.7A CN201810555947A CN108516719A CN 108516719 A CN108516719 A CN 108516719A CN 201810555947 A CN201810555947 A CN 201810555947A CN 108516719 A CN108516719 A CN 108516719A
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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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- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Sealing Material Composition (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
There is self-repair function waterproofing agent and preparation method and a kind of water-proof concrete to concrete the present invention provides a kind of.It the described method comprises the following steps：By Mg2+The magnesium salt solution of a concentration of 0.5~1.5mol/L, with bentonite according to mass ratio 15：1~25：1 is mixed, and bentonite slurry is obtained, wherein the bentonite is sodium bentonite and/or calcium-base bentonite；The bentonite slurry is stirred evenly, is then aged, filtered, precipitated；The precipitation is dried, is crushed, the waterproofing agent is obtained.The waterproofing agent includes the waterproofing agent prepared using the above method.The concrete includes cement, sandstone and above-mentioned waterproofing agent.Beneficial effects of the present invention include：The preparation method is easy, and production cost is low, raw material sources are extensive；The waterproofing agent is good with concrete compatibility, can play permanent water-resistant purpose；The water-proof concrete has excellent water resistance and very strong self-repair function.
Description
Technical field
The present invention relates to building material fields, particularly, are related to a kind of waterproofing agent to concrete with self-repair function
With waterproofing agent preparation method and a kind of water-proof concrete.
Background technology
Concrete is that the current mankind use most large artificial material, during the maintenance of concrete or military service, by
In interfacial transition zone and drying shrinkage, chemical shrinkage, temperature shrinkage, creep phenomena such as presence or extraneous load effect,
Inside can form pore and micro-crack not of uniform size.The presence of these pores and micro-crack can directly result in concrete
The reduction of structure anti-permeability performance causes the decline of concrete water-proof performance.With dampening in the infiltration of inside concrete, can also make
At concrete performance accelerated deterioration, concrete durability also declines to a great extent.Therefore, concrete structure infiltration to be avoided to give birth to people
The maintenance cost of inconvenience and reduction concrete construction that production, life are brought, water-proofing treatment is carried out to it seems completely important.
Currently, there are mainly two types of the methods of concrete building structures waterproof, the first is surface-treated to concrete,
Mainly erosion of the one layer of organic polymer layers with exclusion of water to concrete structure is coated or is laid on its surface.This method exists
More excellent effect can be played in short time, still, the compatibility of such material and concrete substrate is poor, and easily old
Change, this has resulted in it has certain time limit to the waterproof action of concrete.In addition to this, this kind of waterproof type is only limited to mix
The waterproof on solidifying soil surface, cannot play the role of repairing intrinsic silicon microcrack.Another waterproof method is mixed in concrete
Enter waterproofing agent, waterproofing agent type used at present is various, and wherein inorganic waterproofing agent mainly has villaumite, sulfate, waterglass etc.；
The main component of organic waterproofing agent has fatty acid metal salts, synthetic resin and various lotions etc..Above waterproofing agent incorporation
Prodigious influence can be caused on the performance of concrete, such as in concrete：Chlorion can accelerate the corrosion of reinforcement in concrete, sulphur
Acid group can corrosion concrete matrix.Therefore, waterproof means used at present and waterproofing agent be all there is certain defect, in order to
The target for adapting to the Green Development proposed to building trade, needs to develop a kind of novel concrete water-proof material.
Invention content
For the deficiencies in the prior art, it is an object of the invention to solve above-mentioned one existing in the prior art
Or multiple problems.For example, one of the objects of the present invention is to provide a kind of waterproofing agents, anti-to concrete with self-repair function
The preparation method and water-proof concrete of aqua.
To achieve the goals above, one aspect of the present invention provides a kind of having self-repair function waterproofing agent to concrete
Preparation method.The method may include following steps：By Mg2+The magnesium salt solution of a concentration of 0.5~1.5mol/L, is pressed with bentonite
According to mass ratio 15：1~25：1 is mixed, and bentonite slurry is obtained, wherein the bentonite is sodium bentonite and/or calcium
Base bentonite；The bentonite slurry is stirred evenly, is then aged, filtered, precipitated；The precipitation is done
Dry, crushing, obtains the waterproofing agent.
An exemplary embodiment to concrete with self-repair function waterproofing agent preparation method according to the present invention, institute
Mg (NO can be contained by stating magnesium salt solution3)2、MgCl2Or MgSO4In it is one or more.
An exemplary embodiment to concrete with self-repair function waterproofing agent preparation method according to the present invention, institute
During stating stirring：Whipping temp can be 50~80 DEG C, and stir speed (S.S.) can be 800~1200 revs/min, and mixing time can be 5
~8h.
An exemplary embodiment to concrete with self-repair function waterproofing agent preparation method according to the present invention, institute
It can be natural day bentonite to state bentonite.
An exemplary embodiment to concrete with self-repair function waterproofing agent preparation method according to the present invention, institute
The time for stating ageing can be 8~12h.
An exemplary embodiment to concrete with self-repair function waterproofing agent preparation method according to the present invention, institute
It can be 80~90 DEG C to state dry temperature.
An exemplary embodiment to concrete with self-repair function waterproofing agent preparation method according to the present invention, institute
The step of stating filtering may include：Bentonite slurry after filtering the ageing with vacuum pump, and during suction filtration with water repeatedly
Precipitation therein is rinsed, i.e., rinses the precipitation in bentonite slurry after being aged repeatedly.
An exemplary embodiment to concrete with self-repair function waterproofing agent preparation method according to the present invention, institute
The method of stating may also include step：Precipitation after pulverising step described in sieve with 100 mesh further can use 200 purposes
Sieve.
An exemplary embodiment to concrete with self-repair function waterproofing agent preparation method according to the present invention, institute
State that concrete basicity is 10 or more, calcium ion concentration is 0.712~1.068g/L.Further, the basicity of concrete can be 10
~12.
Another aspect of the present invention provide it is a kind of there is self-repair function waterproofing agent to concrete, the waterproofing agent may include
The waterproofing agent prepared using waterproofing agent preparation method as described above.
An exemplary embodiment to concrete with self-repair function waterproofing agent according to the present invention, the waterproofing agent
It may include the following ingredient according to mass percent meter：60~70%SiO2, 15~18%Al2O3, 6~8%MgO, 4~6%
CaO, 3~4%Fe2O3, 1~1.5%K2O。
An exemplary embodiment to concrete with self-repair function waterproofing agent according to the present invention, the waterproofing agent
It can sieve with 100 mesh sieve, further, 200 mesh sieve can be crossed.
Further aspect of the present invention provides a kind of water-proof concrete with self-repair function, and the water-proof concrete can wrap
Include cement, sandstone and waterproofing agent as described above.Wherein, the quality of the cement can account for the 1/8~1/7 of the concrete quality,
The quality proportioning of the waterproofing agent and the cement can be 1：10~1：17.
Compared with prior art, beneficial effects of the present invention include：The preparation method of waterproofing agent of the present invention is easy, is produced into
This is low, raw material sources are extensive；Waterproofing agent produced by the present invention can make concrete have very strong waterproof action；The present invention's is mixed
Solidifying soil is with good waterproof effect and for itself microcrack with very strong self-repair function.
Description of the drawings
By the description carried out below in conjunction with the accompanying drawings, above and other purpose of the invention and feature will become more clear
Chu, wherein：
Fig. 1 show an illustrative embodiment of the invention to concrete have self-repair function waterproofing agent preparation method
Flow diagram.
Specific implementation mode
Hereinafter, by conjunction with attached drawing and exemplary embodiment describe in detail the present invention to concrete have selfreparing
Act on waterproofing agent and preparation method thereof and water-proof concrete.
Since concrete has the characteristics that hole is more, easy to crack, it is made to be susceptible to the feelings of percolating water in use
Condition, this not only affects to people’s lives, production, can also accelerate the deterioration of durability of concrete structures.It is mixed
There is certain deficiencies for the traditional waterproof type of Xtah Crude Clay structure or waterproofing agent, can not adapt to the development reason of green concrete
It reads.
Novel there is self-repair function waterproofing agent and preparation method thereof, Yi Jiyi to concrete the present invention provides a kind of
Kind water-proof concrete.Wherein, the preparation method can be made using bentonite as raw material, using soluble magnesium salting liquid as modifying agent
For the magnesium-based bentonite of high magnesium ion content is gone out, in this, as the waterproofing agent of concrete.The waterproofing agent primarily serves concrete
The effect of following two aspects：(1) since bentonite has the function of water-swellable, incorporation should during the mix of concrete
Waterproofing agent can increase the impermeability and durability of concrete, when water enters inside concrete, the bentonite in matrix
The rapid water swelling of grain meeting blocks crack or hole, blocks the permeation pathway of water；(2) concrete is high-alkali and high-calcium ionic
Under conditions of concentration, the magnesium ion in magnesium-based bentonite waterproof agent is displaced the shepardite and carbonic acid for carrying out generative nature matter stabilization
Magnesium crystal, the product have very strong repair to the microcrack in concrete.Therefore, which is improving agent on crack resistance of concrete
While oozing performance, moreover it is possible to there is very strong repair to the microcrack in concrete substrate, i.e., played to concrete dual
The effect of waterproof.
One aspect of the present invention provides a kind of preparation method to concrete with self-repair function waterproofing agent.
Fig. 1 show an illustrative embodiment of the invention to concrete have self-repair function waterproofing agent preparation method
Flow diagram.
In an exemplary embodiment of the present invention, as shown in Figure 1, the preparation method may include following steps：
Such as the step S01 in Fig. 1, by Mg2+The magnesium salt solution of a concentration of 0.5~1.5mol/L is with bentonite according to mass ratio
15：1~25：1 is mixed, and bentonite slurry is obtained.Wherein, if Mg in magnesium salt solution2+Concentration is too low, then modified effect is poor,
When solution concentration is more than 1.5mol/L, modifying function almost without being improved again, therefore, from modified effect and economic angle
Degree considers, Mg in solution may be selected2+Concentration range be 0.5~1.5mol/L.Bentonite main mineral constituent is montmorillonite, will
Magnesium salt solution is with bentonite according to 15：1~25：1 mixing is because the exchange that the ratio is conducive to montmorillonite interlayer cation is made
With, be conducive to magnesium ion modification, if ratio be more than 25：1, then solution usage amount is larger, of high cost, if ratio is less than 15：1, then
Sheet montmorillonite mineral delamination is insufficient in bentonite, is unfavorable for the exchange interaction of interlayer cation, causes modified effect poor.
Magnesium salt solution can be Mg (NO3)2Solution, MgCl2Solution or MgSO4Solution can also be two kinds mixed in three of the above solution
Conjunction or even the mixing of three kinds of solution, magnesium salt solution of the invention is not limited to this, as long as soluble magnesium salting liquid all may be used.It is swollen
It can be natural montmorillonite or made bentonite to moisten soil, and bentonite can be sodium bentonite and/or calcium base swelling
Two kinds of presently the most common bentonites, select natural montmorillonite as raw material when soil, sodium bentonite and calcium-base bentonite
Cost, good economy performance can be reduced.
Such as the step S02 in Fig. 1, the bentonite slurry is stirred evenly, is then aged, filtered, precipitated.
Bentonite slurry is stirred, the magnesium salt solution and the bentonite can in this way be sufficiently mixed uniformly, can also accelerate
Modifying process.Wherein, when stirring bentonite slurry, the temperature of bentonite slurry can be heated to 50~80 DEG C, can added in this way
The exchange interaction of fast montmorillonite interlayer cation, to accelerate modifying process.Controllable-rate system when stirring is in 800~1200rpm
(rev/min) can also accelerate the exchange interaction of montmorillonite interlayer cation in this way, to accelerate modifying process；Mixing time is controllable
System can make bentonite fully modified by magnesium ion in this way in 5~8h.Digestion time can be controlled in 8~12h, can make in this way
Bentonite is fully modified by magnesium ion.In filter process, vacuum available pump is filtered, and can be rushed with water during suction filtration
Wash precipitation 2~3 times；Filter course is can speed up using vacuum pump suction filtration, during suction filtration, being rinsed with water 2~3 times can go
Except the magnesium ion and relevant anionic group remained in precipitation, to avoid its influence to waterproofing agent performance.
Such as the step S03 in Fig. 1, the precipitation (precipitation that i.e. step S02 is obtained) is dried, is crushed, institute is obtained
State waterproofing agent.Wherein, drying precipitated temperature control may be, for example, 85 DEG C, drying time can be controlled in 10 at 80~90 DEG C
~14h can be further 12h.If drying temperature is too low, drying time is too short, it is impossible to ensure in removal precipitation well
Moisture；If drying temperature is excessively high, drying time is too long, then can destroy ingredient, waste of energy.
In the present embodiment, the method may also include step：It is heavy after pulverising step described in sieve with 100 mesh
It forms sediment, the precipitation by sieve is waterproofing agent.Further, the sieve of 200 mesh can be selected.If waterproofing agent grain size is excessive, meeting
Its action site in concrete is caused to tail off, waterproof action dies down.
After sifting step, the step of the method may also include sealing, to ensure the drying regime of waterproofing agent.
In the present embodiment, the concrete that the waterproofing agent that the method for the present invention is prepared is applicable in is high alkalinity, high-calcium ionic
The concrete of concentration, wherein the basicity of concrete can be 10 or more, such as 12,13 ± 0.5 etc., and calcium ion concentration can be 0.712
~1.068g/L, such as 0.9 ± 0.5g/L.Further, concrete basicity can be 10~12, such as 11 ± 0.5.
In another exemplary embodiment of the present invention, the preparation method of the waterproofing agent may include following steps：
The soluble magnesium salting liquid that certain molar concentration can first be configured, when fully dissolving is equal under the action of blender for it
After even, natural montmorillonite is added by a certain percentage, at certain temperature and stir speed (S.S.) by bentonite slurry stir 5~
8h, is then aged after a certain period of time, is filtered to it with vacuum pump, washs bentonite 2 repeatedly with water during suction filtration
~3 times.Filtered modified alta-mud is dry under conditions of 85 DEG C.Then it is crushed with pulverizer, sieving obtains magnesium-based
Bentonite waterproof agent.
Wherein, the soluble magnesium salting liquid is Mg (NO3)2、MgCl2、MgSO4Solution, solution concentration 0.5~
Between 1.5mol/L, what can be configured to be stirred with magnetic stirrer matches salting liquid, at 26~35 DEG C, the condition of 400~600rpm
Under make it dissolve uniformly.Certainly, the present invention can also directly use the magnesium salt solution configured, be not necessarily to situ configuration.It is used
Raw material be natural montmorillonite, mainly include two kinds of natural calcium-base bentonite and natural sodium bentonite；Natural montmorillonite with
The mass ratio of magnesium salt solution is 1：15~1：Between 25；The whipping temp of bentonite slurry is 50~80 DEG C, and stir speed (S.S.) is
800~1200rpm；Bentonite slurry digestion time is 8~12h after the completion of the stirring；The broken, mistake by filtering bentonite
Magnesium-based bentonite waterproof agent is obtained after 200 mesh sieve.
Exemplary embodiments mentioned above for a better understanding of the present invention, with reference to specific example to its into advance one
Walk explanation.
Example 1
It is a kind of to be to preparation method of the concrete with self-repair function waterproofing agent：Configure the Mg (NO of 1mol/L3)2Solution
It pours into container and is subsequently placed on magnetic stirrer, after being made it dissolve under conditions of 30 DEG C, 500rpm uniformly, by 25：1 (i.e.
Magnesium salt solution and bentonitic mass ratio) ratio be added certain mass natural sodium bentonite.80 DEG C are warming up to,
8h is stirred under conditions of 1000rpm.After the bentonite slurry ageing 12h that reaction is completed, it is filtered by vacuum, is being filtered
During wash bentonite repeatedly with water 2~3 times.Filtered bentonite is dried into 12h under conditions of 85 DEG C, is then passed through
It crosses crushing crusher machine, cross 200 mesh sieve, sealing obtains the waterproofing agent.
Performance test results：
The magnesium-based bentonite waterproof agent being prepared by the above process is incorporated by cement mixing content 6% in mortar, with sky
It is 300% that white group, which compares its permeable pressure ratio, compressive strength rate 120%；Sample is continued after conserving 28d, compression strength
Recovery rate is 90%, and permeable pipe recovery ratio is 80%, has splendid water proof anti-seepage effect and selfreparing effect.
Example 2
It is a kind of to be to preparation method of the concrete with self-repair function waterproofing agent：Configure the Mg (NO of 1.5mol/L3)2It is molten
Liquid is poured into the beaker of 2L and is subsequently placed on magnetic stirrer, after being made it dissolve under conditions of 30 DEG C, 500rpm uniformly, is pressed
20：The natural sodium bentonite of certain mass is added in the ratio of 1 (i.e. magnesium salt solution and bentonitic mass ratio).It is warming up to 70
DEG C, stir 6h under conditions of 1200rpm.After the bentonite slurry ageing 12h that reaction is completed, it is filtered by vacuum,
Wash with water bentonite repeatedly during suction filtration 2~3 times.Filtered bentonite is dried into 12h under conditions of 85 DEG C,
Then by crushing crusher machine, crossing 200 mesh sieve, sealing obtains the waterproofing agent.
Performance test results：
The magnesium-based bentonite waterproof agent being prepared by the above process is incorporated by cement mixing content 6% in mortar, with sky
It is 290% that white group, which compares its permeable pressure ratio, compressive strength rate 115%, sample is continued after conserving 28d, compression strength
Recovery rate is 88%, and permeable pipe recovery ratio is 82%, has splendid water proof anti-seepage effect and selfreparing effect.
Example 3
It is a kind of to be to preparation method of the concrete with self-repair function waterproofing agent：Configure the MgCl of 1mol/L2Solution falls
Enter and be subsequently placed on magnetic stirrer in the beaker of 2L, after being made it dissolve under conditions of 30 DEG C, 500rpm uniformly, by 20：1
The natural calcium-base bentonite of certain mass is added in the ratio of (i.e. magnesium salt solution and bentonitic mass ratio).80 DEG C are warming up to,
6h is stirred under conditions of 1200rpm.After the bentonite slurry ageing 12h that reaction is completed, it is filtered by vacuum, is being filtered
During wash bentonite repeatedly with water 2~3 times.Filtered bentonite is dried into 12h under conditions of 85 DEG C, is then passed through
It crosses crushing crusher machine, cross 200 mesh sieve, sealing obtains the waterproofing agent.
Performance test results：
The magnesium-based bentonite waterproof agent being prepared by the above process is incorporated by cement mixing content 7.5% in mortar, with
It is 250% that blank group, which compares its permeable pressure ratio, compressive strength rate 150%, sample is continued after conserving 28d, pressure resistance
It is 85% to spend recovery rate, and permeable pipe recovery ratio is 83%, has splendid water proof anti-seepage effect and selfreparing effect.
Example 4
It is a kind of to be to preparation method of the concrete with self-repair function waterproofing agent：Configure the MgSO of 1mol/L4Solution falls
Enter and be subsequently placed on magnetic stirrer in the beaker of 2L, after being made it dissolve under conditions of 30 DEG C, 500rpm uniformly, by 25：1
The natural calcium-base bentonite of certain mass is added in the ratio of (i.e. magnesium salt solution and bentonitic mass ratio).60 DEG C are warming up to,
8h is stirred under conditions of 1200rpm.After the bentonite slurry ageing 10h that reaction is completed, it is filtered by vacuum, is being filtered
During wash bentonite repeatedly with water 2~3 times.Filtered bentonite is dried into 12h under conditions of 85 DEG C, is then passed through
It crosses crushing crusher machine, cross 200 mesh sieve, sealing obtains the waterproofing agent.
Performance test results：
The magnesium-based bentonite waterproof agent being prepared by the above process is incorporated by cement mixing content 6% in mortar, with sky
It is 240% that white group, which compares its permeable pressure ratio, compressive strength rate 140%, sample is continued after conserving 28d, compression strength
Recovery rate is 92%, and permeable pipe recovery ratio is 70%, has splendid water proof anti-seepage effect and selfreparing effect.
Example 5
It is a kind of to be to preparation method of the concrete with self-repair function waterproofing agent：Configure the MgSO of 0.5mol/L4Solution
It pours into the beaker of 2L and is subsequently placed on magnetic stirrer, after being made it dissolve under conditions of 30 DEG C, 500rpm uniformly, by 15：1
The natural sodium bentonite of certain mass is added in the ratio of (i.e. magnesium salt solution and bentonitic mass ratio).80 DEG C are warming up to,
7h is stirred under conditions of 1200rpm.After the bentonite slurry ageing 12h that reaction is completed, it is filtered by vacuum, is being filtered
During wash bentonite repeatedly with water 2~3 times.Filtered bentonite is dried into 12h under conditions of 85 DEG C, is then passed through
It crosses crushing crusher machine, cross 200 mesh sieve, sealing obtains the waterproofing agent.
Performance test results：
The magnesium-based bentonite waterproof agent being prepared by the above process is incorporated by cement mixing content 7% in mortar, with sky
It is 230% that white group, which compares its permeable pressure ratio, compressive strength rate 110%, sample is continued after conserving 28d, compression strength
Recovery rate is 85%, and permeable pipe recovery ratio is 70%, has splendid water proof anti-seepage effect and selfreparing effect.
Example 6
It is a kind of to be to preparation method of the concrete with self-repair function waterproofing agent：Configure the Mg (NO of 1mol/L3)2Solution
It pours into the beaker of 2L and is subsequently placed on magnetic stirrer, after being made it dissolve under conditions of 30 DEG C, 500rpm uniformly, by 20：1
The natural sodium bentonite of certain mass is added in the ratio of (i.e. magnesium salt solution and bentonitic mass ratio).60 DEG C are warming up to,
6h is stirred under conditions of 1000rpm.After the bentonite slurry ageing 12h that reaction is completed, it is filtered by vacuum, is being filtered
During wash bentonite repeatedly with water 2~3 times.Filtered bentonite is dried into 12h under conditions of 85 DEG C, is then passed through
It crosses crushing crusher machine, cross 200 mesh sieve, sealing obtains the waterproofing agent.
Performance test results：
The magnesium-based bentonite waterproof agent being prepared by the above process is incorporated by cement mixing content 6.5% in mortar, with
It is 240% that blank group, which compares its permeable pressure ratio, compressive strength rate 115%, sample is continued after conserving 28d, pressure resistance
It is 80% to spend recovery rate, and permeable pipe recovery ratio is 78%, has splendid water proof anti-seepage effect and selfreparing effect.
Example 7
It is a kind of to be to preparation method of the concrete with self-repair function waterproofing agent：Configure the MgSO of 1mol/L4Solution falls
Enter and be subsequently placed on magnetic stirrer in the beaker of 2L, after being made it dissolve under conditions of 30 DEG C, 500rpm uniformly, by 20：1
The natural sodium bentonite of certain mass is added in the ratio of (i.e. magnesium salt solution and bentonitic mass ratio).80 DEG C are warming up to,
8h is stirred under conditions of 900rpm.After the bentonite slurry ageing 8h that reaction is completed, it is filtered by vacuum, in suction filtration
Wash bentonite repeatedly with water in the process 2~3 times.Filtered bentonite is dried into 12h under conditions of 85 DEG C, is then passed through
It crushes crusher machine, cross 200 mesh sieve, sealing obtains the waterproofing agent.
Performance detection：The magnesium-based bentonite waterproof agent being prepared by the above process is incorporated into sand by cement mixing content 9%
In slurry, it is 260% that its permeable pressure ratio is compareed with blank group, compressive strength rate 118%, and sample is continued after conserving 28d,
Compression strength recovery rate is 85%, and permeable pipe recovery ratio is 76%, and there is splendid water proof anti-seepage effect and selfreparing to imitate
Fruit.
Through testing repeatedly, the waterproofing agent prepared of exemplary embodiment of the present have excellent water proof anti-seepage effect with
And selfreparing effect.For example, being compareed with the blank group for the waterproofing agent for being not added with the present invention, it is added with exemplary embodiment of the present
Waterproofing agent concrete permeable pressure ratio can be 230% or more, even up to 300%；Compressive strength rate can be
110% or more, even up to 150%；Continue after conserving 28d, compression strength recovery rate can be 80% or more, even up to
92%；Permeable pipe recovery ratio is 70% or more, even up to 83%.
Another aspect of the present invention provide it is a kind of there is self-repair function waterproofing agent to concrete, the waterproofing agent may include
Using the waterproofing agent prepared as described above with self-repair function waterproofing agent preparation method to concrete.
In the further exemplary embodiment of the present invention, the waterproofing agent may include following ingredient as shown in Table 1.
The main component and content (mass percent) of 1 waterproofing agent of table
For example, according to mass percent meter, following ingredient by mass percentage is contained in waterproofing agent：63% ±
1%SiO2, 17% ± 0.3%Al2O3, 7% ± 0.5%MgO, 5% ± 0.5%CaO, 3.5% ± 0.2%Fe2O3, 1.3% ±
0.1%K2O。
In the present embodiment, the waterproofing agent can sieve with 100 mesh sieve, and further, can cross 200 mesh sieve.
Since waterproofing agent is to react to each other by the expansion of bentonite itself and between concrete substrate to generate property
Stable shepardite crystal and carbonic acid magnesium crystal plays the role of waterproof and selfreparing, so concrete is not in aging
Or the phenomenon that waterproof effect decrease, and can overcome the shortcomings of conventional waterproof material, so that concrete is reached the mesh of permanent waterproof
's.
Further aspect of the present invention provides a kind of water-proof concrete with self-repair function, and the concrete may include water
Mud, sandstone and above-mentioned waterproofing agent, and by mass, cement accounts for the 1/8~1/7 of concrete, and the matter of waterproofing agent and cement
Amount proportioning is 1：10~1：17.
In conclusion the waterproofing agent preparation method of the present invention is easy, production cost is low, raw material sources are extensive, has very
Wide market application prospect.The waterproofing agent of the present invention is inorganic material, good with concrete compatibility, is not in that aging etc. is existing
As the purpose of permanent water-resistant can be played；The water-proof concrete of the present invention not only has excellent water resistance, also to itself
Microcrack has very strong self-repair function.
Although above by describing the present invention in conjunction with exemplary embodiment, those skilled in the art should be clear
Chu can carry out exemplary embodiment of the present invention each in the case where not departing from spirit and scope defined by claim
Kind modifications and changes.
Claims (10)
1. a kind of preparation method to concrete with self-repair function waterproofing agent, which is characterized in that the method includes following
Step：
By Mg2+The magnesium salt solution of a concentration of 0.5~1.5mol/L, with bentonite according to mass ratio 15：1~25：1 is mixed,
Obtain bentonite slurry, wherein the bentonite is sodium bentonite and/or calcium-base bentonite；
The bentonite slurry is stirred evenly, is then aged, filtered, precipitated；
The precipitation is dried, is crushed, the waterproofing agent is obtained.
2. the preparation method to concrete with self-repair function waterproofing agent according to claim 1, which is characterized in that institute
It states magnesium salt solution and contains Mg (NO3)2、MgCl2Or MgSO4In it is one or more.
3. the preparation method to concrete with self-repair function waterproofing agent according to claim 1, which is characterized in that institute
During stating stirring：Whipping temp is 50~80 DEG C, and stir speed (S.S.) is 800~1200 revs/min, and mixing time is 5~8h.
4. the preparation method to concrete with self-repair function waterproofing agent according to claim 1, which is characterized in that institute
Digestion time control is stated in 8~12h.
5. the preparation method to concrete with self-repair function waterproofing agent according to claim 1, which is characterized in that institute
The step of stating filtering include：Bentonite slurry after filtering the ageing with vacuum pump, and rushed repeatedly with water during suction filtration
Wash precipitation therein.
6. the preparation method to concrete with self-repair function waterproofing agent according to claim 1, which is characterized in that institute
The basicity for stating concrete is 10 or more, calcium ion concentration is 0.712~1.068g/L.
7. a kind of waterproofing agent to concrete with self-repair function, which is characterized in that the waterproofing agent includes according to quality hundred
Divide the following ingredient than counting：
60~70%SiO2, 15~18%Al2O3, 6~8%MgO, 4~6%CaO, 3~4%Fe2O3With 1~1.5%K2O。
8. the waterproofing agent to concrete with self-repair function according to claim 7, which is characterized in that the waterproofing agent
It can sieve with 100 mesh sieve.
9. a kind of water-proof concrete with self-repair function, which is characterized in that the water-proof concrete include cement, sandstone and
Waterproofing agent as described in claim 7 or 8.
10. the water-proof concrete according to claim 9 with self-repair function, which is characterized in that the matter of the cement
Amount accounts for the 1/8~1/7 of the concrete quality, and the quality proportioning of the waterproofing agent and the cement is 1：10~1：17.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116199447A (en) * | 2023-03-23 | 2023-06-02 | 浙江大学台州研究院 | Preparation method of composite doped bentonite modifier and waterproof material |
| CN117247245A (en) * | 2023-09-19 | 2023-12-19 | 江苏信迪防水材料有限公司 | Waterproof concrete compacting agent and preparation method and application thereof |
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| CN1062549A (en) * | 1992-01-30 | 1992-07-08 | 陈国忠 | Composite mortar, concrete water-proofing agent |
| CN1077700A (en) * | 1992-04-14 | 1993-10-27 | 陈德蓂 | Concrete waterproofer |
| JP2011236072A (en) * | 2010-05-10 | 2011-11-24 | Denki Kagaku Kogyo Kk | Swellable self-healing cement admixture and cement composition |
| CN102516962A (en) * | 2011-11-24 | 2012-06-27 | 中国科学院青海盐湖研究所 | Hole sealing material of potassium-magnesium salt mine drilling holes and hole sealing method thereof |
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| CN1062549A (en) * | 1992-01-30 | 1992-07-08 | 陈国忠 | Composite mortar, concrete water-proofing agent |
| CN1077700A (en) * | 1992-04-14 | 1993-10-27 | 陈德蓂 | Concrete waterproofer |
| JP2011236072A (en) * | 2010-05-10 | 2011-11-24 | Denki Kagaku Kogyo Kk | Swellable self-healing cement admixture and cement composition |
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Cited By (3)
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| CN116199447A (en) * | 2023-03-23 | 2023-06-02 | 浙江大学台州研究院 | Preparation method of composite doped bentonite modifier and waterproof material |
| CN117247245A (en) * | 2023-09-19 | 2023-12-19 | 江苏信迪防水材料有限公司 | Waterproof concrete compacting agent and preparation method and application thereof |
| CN117247245B (en) * | 2023-09-19 | 2024-02-20 | 江苏信迪防水材料有限公司 | Waterproof concrete compacting agent and preparation method and application thereof |
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| CN108516719B (en) | 2021-03-09 |
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