CN110105025A - Based on the modified cementitious capillary waterproofing material of nano silica-base material and its preparation and application - Google Patents
Based on the modified cementitious capillary waterproofing material of nano silica-base material and its preparation and application Download PDFInfo
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- CN110105025A CN110105025A CN201910531662.4A CN201910531662A CN110105025A CN 110105025 A CN110105025 A CN 110105025A CN 201910531662 A CN201910531662 A CN 201910531662A CN 110105025 A CN110105025 A CN 110105025A
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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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
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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
- 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
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
Abstract
The present invention relates to a kind of cementitious capillary waterproofing materials and its preparation and application modified based on nano silica-base material, waterproof material includes the component of following parts by weight: 45-65 parts of cement, 14-32 parts of quartz sand, 5-10 parts of retarder, 0.1-0.4 parts of nano silica-base material, 2-9 parts of crystalline deposit agent, 0.5-5 parts of surfactant, 0.5-2 parts of complexing agent, 1-5 parts of calcium ion compensation, 0.5-2 parts of water-reducing agent, 0.2-2 parts of cellulose ether.Compared with prior art, waterproof material of the invention is suitable for repairing inside concrete hole crack, when cement-based material generates crack (being less than 0.4mm), it generates insoluble deposit in cement-based material crack under that condition of water, filling, closing cement-based material crack, realize the selfreparing of cement-based material crack.
Description
Technical field
The invention belongs to architectural waterproof material technical fields, are related to a kind of cement base infiltration modified based on nano silica-base material
Saturating crystalline waterproof material and its preparation and application.
Background technique
In recent years, Building Trade in China development speed is very fast, and construction scope continues to increase, but the Leakage Problems in Buildings generated
More and more, related investigation display, building leakage problem allows of no optimist, and most of buildings all have different degrees of leakage.It builds
Building percolation ratio height is successively floor top layer (95%), residential building (63.6%), the underground space (57.4%).It unites according to the Ministry of Construction
Meter, about quality complaints, more than half is about leakage of buildings problem.Influence the factor of building waterproof quality very
It is more, many aspects such as material, design, construction, maintenance management are involved, and roofing, basement, kitchen, lavatory etc. are also easy to produce product
The position of water is the emphasis of building waterproof.Currently, the annual maintenance exterior wall, roofing, basement, kitchen, toilet, balcony of country
About 2.4 hundred million, using about 270,000 tons of various waterproof materials, expense is up to 2,000,000,000 yuan or more.If leakage problems do not solve, from now on new
Filter loss caused by building, will be immeasurable.
In water environment, such as housing basement, municipal underground piping, highway communication tunnel and subway sectional tunnel, underground
Station etc., reinforced concrete structure often because of unreasonable structural design, Concrete Design is unreasonable, constructional deficiency, maintenance less than
The factors such as position cause concrete is crack to split, and reduce structural bearing capacity, while microcrack accelerates the infiltration of water and chloride ion, accelerate
Steel bar corrosion.Therefore, the waterproof quality of building engineering structure how is improved, it has also become a problem for perplexing building trade is built
Building waterproofing technology and waterproof material oneself become the important topic that scientific research personnel puts forth effort research.
And cementitious capillary waterproofing material can be seeped under water environment by the active material concentration gradient of itself
The hole crack for penetrating into inside concrete goes out, the calcium hydroxide reaction crystalline deposit generated with unhydrated cement granules and aquation
Reaction promotes hydration reaction, generates the fracture pore of a large amount of acicular crystal blocking inside concrete, to reach permanent waterproof
Purpose.Cementitious capillary waterproofing material relative to other waterproof materials have stronger permeability, it is unique self
Repair ability, mends a split and permanent waterproof action, effectively can quickly solve the leakage problems of building, be a kind of waterproof
The waterproof material of function admirable.
Chinese patent CN102167547 A discloses a kind of novel cement-based infiltration for quickly repairing concrete microcrack
Saturating crystalline waterproof material.The mineral additive is added in cement group water-proofing material, so that it may promote the quick increasing of crystal
It is long, so can generally repair generated minute crack within one week when occurring crack on concrete substrate.But the hair
It is bright to be only applicable to rehabilitating concrete surface crack, inside concrete cannot be penetrated further into, fracture pore is repaired, improves concrete
Anti-permeability performance because the infiltration and crystallization of cementitious capillary waterproofing material be interaction.Such as mix this specially
When mineral additive described in benefit, under the conditions of existing for the surface crack, the active material in waterproof material is only capable of quickly repairing
Surface crack, solid surface hole crack, the effect of reaching of short duration waterproof, anti-permeability performance can not further increase.On surface
Under the action of activating agent, the surface potential energy of water is reduced, active material can preferably seep under the action of concentration gradient with moisture
Enter inside concrete, penetrant crystalline reaction occurs, to improve the waterproof impervious characteristic of building.Chinese patent
CN107540304A discloses a kind of composite cement base osmotic crystalline waterproof material.Institute is added in cement group water-proofing material
After stating compound additive, under the action of water, the active chemistry in waterproof material has stronger permeability, promotes
Hydration reaction occurs for unhydrated cement granules, generates a large amount of acicular crystal, and filling closing capillary channel makes cement concrete
Have the function of excellent water proof anti-seepage, though the active material permeability in the invention is good, is difficult quickly to repair splitting for concrete
Slot apertures gap improves waterproof impervious characteristic.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind based on nano silicon-based
The cementitious capillary waterproofing material of material modification and its preparation and application.
The purpose of the present invention can be achieved through the following technical solutions:
One of technical solution of the present invention proposes a kind of cement-base infiltration crystallization type modified based on nano silica-base material
Waterproof material, which is characterized in that the component including following parts by weight: 45-65 parts of cement, 14-32 parts of quartz sand, retarder 5-
10 parts, 0.1-0.4 parts of nano silica-base material, 2-9 parts of crystalline deposit agent, 0.5-5 parts of surfactant, 0.5-2 parts of complexing agent, calcium
1-5 parts of Lithium ions compensation agent, 0.5-2 parts of water-reducing agent, 0.2-2 parts of cellulose ether.
Further, the cement is P.O.52.5 portland cement, specifically the small wild field silicate of optional P.O.52.5
Cement.
Further, the retarder be citric acid and sodium carbonate mixture, the two according to weight ratio be 1:1~2 into
Row addition.The aquation setting time for reacting the adjustable cement base coating of sodium citrate generated, improve unhydrated cement granules
Content is conducive to active material and does not react with the cement granules in coating, further penetrates into crystalline deposit in concrete substrate,
Plugging hole crazing seam；Sodium citrate can form complex compound with calcium ion simultaneously, and the healing for hole crack is provided needed for reaction
Calcium ion, volume is more, and the calcium ion amount of deposit is bigger, is more conducive to long-term repair crack.
Further, the nano silica-base material is powdered nanoparticles silica, neutral silica dispersions or alkalinity
The one of which of nano silicon dioxide dispersion (nano silica solid content be 10wt%~30wt%) in dispersion liquid or
It is a variety of.Nano silica is due to superior with small-size effect, surface-interface effect, quantum size effect and bulk effect etc.
Characteristic, thus nano silica is mixed as that can penetrate further into active material incorporation cementitious capillary waterproofing material
Solidifying soil is internal, promotes hydration reaction, and the gel of generation repairs fracture pore, to improve its anti-permeability performance, has permanent waterproof
The effect of.
Further, the crystalline deposit agent is quick dissolved sodium silicate and/or sodium carbonate, and the two is 1:1~2 according to weight ratio
It is added.Preferably, the modulus of quick dissolved sodium silicate is 2.8 or 3.3.And sodium carbonate is preferably heavy soda ash and light soda ash
One or more of them.The calcium hydroxide that quick dissolved sodium silicate and sodium carbonate can be generated with inside concrete hydration reaction continues
Reaction generates crystalline solid and gel, fills up hole crack, while can also reduce calcium hydroxide content, further promotes inside not
The aquation of hydrated cement particle improves the intensity and anti-permeability performance of matrix.
Further, the surfactant is dodecyl ethyoxyl sulfobetaines or dodecyl sulfopropyl beet
Alkali.Surfactant can be such that two-phase is seen by different piece in molecule respectively to the affine of water and concrete two-phase
Make the ingredient of this phase, to reduce surface tension and surface free energy.Active material can with moisture under concentration gradient more
The certain depth for easily infiltrating into inside concrete reaches the closely knit concrete pore crack of crystallization, improves the purpose of water proof anti-seepage.
Further, the complexing agent is levotartaric acid, dextrotartaric acid, mesotartaric acid, the left-handed winestone of two water
The one or more of them of sour sodium disodium, ethylenediamine tetra-acetic acid, disodium ethylene diamine tetraacetate or tetrasodium ethylenediamine tetraacetate.In water
Complexing agent is added in cement-based material, when concrete substrate cracks leak, complexing agent can form network with calcium ion in water environment
Object is closed, is diffused into the ponding in concrete pore crack, in response type SiO3 2-Where, because the difference of solubility generates
The CaSiO of indissoluble3, it is deposited in the hole of concrete, the complex ions divided out are spread again, constantly carry out being complexed-sinking
The fracture pore of concrete substrate is repaired in reaction of forming sediment.When matrix is drying regime, complexing agent is in " suspend mode "；When matrix again
Secondary leak, complexing agent will be " activated " again, concrete substrate be repaired, to improve its waterproof impervious characteristic.
Further, the calcium ion compensation is calcium hydroxide；
The water-reducing agent is Early-strength polycarboxylate superplasticizer.
The two of technical solution of the present invention propose a kind of cement-base infiltration crystallization type modified based on nano silica-base material
The preparation method of waterproof material, which is characterized in that all raw materials are watered after mixing evenly, obtain coating shape substance, then by its
Coated in cement concrete surface to get arrive purpose product.
After waterproof material and water effect, active chemistry has stronger permeability, can penetrate deep by carrier of water
To inside concrete structure, promotes unhydrated cement to react in the internal void of concrete and generates a large amount of acicular crystals,
Quickly filling capillary channel and fine gap, and inside concrete is penetrated into, improve concrete compactness and waterproofness.
The three of technical solution of the present invention propose a kind of cement-base infiltration crystallization type modified based on nano silica-base material
Application of the waterproof material in water conservancy project, prevention of marine concrete structures or underground concrete structure.
Active material in cementitious capillary waterproofing material can be moved in water environment by concentration difference mixed
It coagulates soil cracking and hole position carries out crystallization reaction, it is permanent anti-it is necessary to have to quickly generate a large amount of acicular crystal reparation concrete
The effect of water improves the waterproof performance and durability of concrete.Not only cost is relatively low, but also is also equipped with pollution-free, nuisanceless, behaviour
Make the advantages such as simple.Meanwhile using effect is more significant than other most products in the market.
Compared with prior art, the invention has the following advantages that
(1) use nano silica as nano silicon-based modified material: with the continuous improvement of concrete technology, coagulation
Soil is more and more closely knit, and traditional cement-base infiltration crystallization material is reduced in the osmosis of inside concrete, cannot significantly improve
The water proof anti-seepage ability of building, the present invention is directed to this phenomenon, using nano silica as nano silicon-based modified material.
Since nano silica has the advantageous characteristics such as small-size effect, surface-interface effect, quantum size effect and bulk effect,
Nano silica is added in cementitious capillary waterproofing material as active material and can further go deep into concrete
Portion occurs crystallization reaction, improves its anti-permeability performance.Due to nano silica higher cost, alkali can be also generated when volume is excessive
Aggregate reaction attracts unnecessary expansion so that volume high power increases, so that matrix is destroyed, so the nanometer two that incorporation is a small amount of
Silica and other crystalline deposit agent, which are used in conjunction with each other, can reach remarkable result.
(2) use dodecyl ethyoxyl sulfobetaines etc. as surfactant: surfactant sodium dodecyl base second
Oxygroup sulfobetaines is a kind of amphoteric surfactant, can be dissolved under alkaline condition, also can be molten in acid condition
Solution, this just expands the range of cement base pH.Use dodecyl ethyoxyl sulfobetaines as surfactant, Ke Yitong
Different piece in molecule is crossed respectively to the affine of water and concrete two-phase, and two-phase is made to be regarded as the ingredient of this phase, molecule row
Column between the two phases, are equivalent to the surface of two-phase and are transferred to intramolecule, since two-phase is all regarded as a component of this phase,
It is equivalent to two phases and surfactant molecule does not all form interface, to reduce surface tension and surface free energy.
Therefore, active material is more easier to penetrate into the certain depth of inside concrete under concentration gradient with moisture, reaches candied honey
Real concrete pore crack, improves the purpose of water proof anti-seepage.
(3) citric acid and sodium carbonate are used in mixed way: addition citric acid and sodium carbonate, when adding water and stirring, react life
At sodium citrate and CO2, and a large amount of heat is released, and when waterproof material internal temperature is higher, the reactivity of active material
Also it is improved, meanwhile, CO2When discharge, part holes can be generated, more facilitate active material under that condition of water to coagulation
Penetrant crystalline reaction inside soil, improves the anti-permeability performance of concrete.The product sodium citrate of generation also has deferred action,
In reaction in cement base soil layer, CO2After discharge and reaction heat leakage, slow aquation gradually occurs for coating, to reach cement
Base osmotic crystalline waterproof material coating it is gradually closely knit, provide one layer of protection for water proof anti-seepage.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.The present embodiment is based on the technical solution of the present invention
Implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention be not limited to it is following
Embodiment.
Embodiment 1
A kind of cementitious capillary waterproofing material is made of the raw material of following weight:
45 parts of portland cement；
31.4 parts of quartz sand；
4 parts of citric acid；
12 parts of sodium carbonate；
3 parts of quick dissolved sodium silicate；
0.4 part of nano silica；
0.5 part of surfactant；
0.5 part of tartaric acid；
1 part of calcium ion compensation；
2 parts of polycarboxylate water-reducer；
0.2 part of cellulose ether；
Wherein, the quartz sand is compounded to obtain by 40~70 mesh, 70~100 mesh and 100~140 mesh, compounding weight ratio tool
Body is 1:2:1；Surfactant is dodecyl ethyoxyl sulfobetaines；The viscosity of cellulose ether is 200~1500mPa
The ethoxyl methyl cellulose ether of S.
Embodiment 2
A kind of cementitious capillary waterproofing material is made of the raw material of following weight:
55 parts of portland cement；
27 parts of quartz sand；
3 parts of citric acid；
7 parts of sodium carbonate；
1 part of quick dissolved sodium silicate；
0.4 part of nano silica；
1.1 parts of surfactant；
1.5 parts of tartaric acid；
1 part of calcium ion compensation；
2 parts of polycarboxylate water-reducer；
1 part of cellulose ether；
Wherein, the quartz sand is compounded to obtain by 40~70 mesh, 70~100 mesh and 100~140 mesh, compounding weight ratio tool
Body is 1:2:1；Surfactant is dodecyl azochlorosulfonate propyl lycine；The viscosity of cellulose ether is 200~1500mPaS's
Ethoxyl methyl cellulose ether.
Embodiment 3
A kind of cementitious capillary waterproofing material is made of the raw material of following weight:
60 parts of portland cement；
18.5 parts of quartz sand；
4 parts of citric acid；
10 parts of sodium carbonate；
3 parts of quick dissolved sodium silicate；
0.1 part of nano silica；
0.5 part of surfactant；
0.5 part of tartaric acid；
2 parts of calcium ion compensation；
1 part of polycarboxylate water-reducer；
0.4 part of cellulose ether；
Wherein, the quartz sand is compounded to obtain by 40~70 mesh, 70~100 mesh and 100~140 mesh, compounding weight ratio tool
Body is 1:2:1；Surfactant is dodecyl ethyoxyl sulfobetaines or dodecyl azochlorosulfonate propyl lycine；Cellulose ether
Viscosity be 200~1500mPaS ethoxyl methyl cellulose ether.
Embodiment 4
A kind of cementitious capillary waterproofing material is made of the raw material of following weight:
65 parts of portland cement；
14.3 parts of quartz sand；
2 parts of citric acid；
3 parts of sodium carbonate；
1 part of quick dissolved sodium silicate；
0.2 part of nano silica；
5 parts of surfactant；
2 parts of tartaric acid；
5 parts of calcium ion compensation；
0.5 part of polycarboxylate water-reducer；
2 parts of cellulose ether；
Wherein, the quartz sand is compounded to obtain by 40~70 mesh, 70~100 mesh and 100~140 mesh, compounding weight ratio tool
Body is 1:2:1；Surfactant is dodecyl ethyoxyl sulfobetaines or dodecyl azochlorosulfonate propyl lycine；Cellulose ether
Viscosity be 200~1500mPaS ethoxyl methyl cellulose ether.
Embodiment 5
Compared with Example 4, the overwhelming majority is all identical, in addition to the nano silica of waterproof material in the present embodiment is changed to
Quick dissolved sodium silicate is made of the raw material of following weight:
65 parts of portland cement；
14.3 parts of quartz sand；
2 parts of citric acid；
3 parts of sodium carbonate；
1.2 parts of quick dissolved sodium silicate；
5 parts of surfactant；
2 parts of tartaric acid；
5 parts of calcium ion compensation；
0.5 part of polycarboxylate water-reducer；
2 parts of cellulose ether；
Wherein, the quartz sand is compounded to obtain by 40~70 mesh, 70~100 mesh and 100~140 mesh, compounding weight ratio tool
Body is 1:2:1；Surfactant is dodecyl ethyoxyl sulfobetaines or dodecyl azochlorosulfonate propyl lycine；Cellulose ether
Viscosity be 200~1500mPaS ethoxyl methyl cellulose ether.
Embodiment 6
Compared with Example 4, the overwhelming majority is all identical, in addition to the citric acid of waterproof material in the present embodiment and sodium carbonate body
System is changed to sodium citrate system, is made of the raw material of following weight:
65 parts of portland cement；
14.3 parts of quartz sand；
2 parts of sodium citrate；
1 part of sodium carbonate；
1 part of quick dissolved sodium silicate；
0.2 part of nano silica；
5 parts of surfactant；
2 parts of tartaric acid；
5 parts of calcium ion compensation；
0.5 part of polycarboxylate water-reducer；
2 parts of cellulose ether；
Wherein, the quartz sand is compounded to obtain by 40~70 mesh, 70~100 mesh and 100~140 mesh, compounding weight ratio tool
Body is 1:2:1；Surfactant is that (mass ratio is for dodecyl ethyoxyl sulfobetaines and dodecyl azochlorosulfonate propyl lycine
1:1)；The viscosity of cellulose ether is the ethoxyl methyl cellulose ether of 200~1500mPaS.
Embodiment 7
Compared with Example 4, the overwhelming majority is all identical, in addition to the surfactant of waterproof material in the present embodiment is by 12
Alkyl ethoxy sulfobetaines or dodecyl azochlorosulfonate propyl lycine are changed to neopelex, are matched by following parts by weight
The raw material of ratio forms:
65 parts of portland cement；
14.3 parts of quartz sand；
2 parts of sodium citrate；
1 part of sodium carbonate；
1 part of quick dissolved sodium silicate；
0.2 part of nano silica；
5 parts of surfactant；
2 parts of tartaric acid；
5 parts of calcium ion compensation；
0.5 part of polycarboxylate water-reducer；
2 parts of cellulose ether；
Wherein, the quartz sand is compounded to obtain by 40~70 mesh, 70~100 mesh and 100~140 mesh, compounding weight ratio tool
Body is 1:2:1；Surfactant is neopelex；The viscosity of cellulose ether is the hydroxyl second of 200~1500mPaS
Ylmethyl cellulose ether.
Performance test has been carried out to the cementitious capillary waterproofing material of Examples 1 to 7, the results are shown in Table 1.
The properties test result of 1 cementitious capillary waterproofing material of table
In order to support the present invention excellent in performance relative to other cementitious capillary waterproofing material patents of invention
The opposite sex under equal conditions carries out anti-permeability performance test comparison, result with several patents of invention being mentioned above to the present invention
As shown in table 2.
2 present example 2 of table is compared with publication partial properties index
Note: comparison patent 1 is CN102167547A, and comparison patent 2 is CN106946518A, and comparison patent 3 is
CN104609801A, comparison patent 4 are CN107540304.
Comparative example 1
A kind of cementitious capillary waterproofing material is made of the raw material of following weight:
55.4 parts of portland cement；
27 parts of quartz sand；
3 parts of citric acid；
7 parts of sodium carbonate；
1 part of quick dissolved sodium silicate；
1.1 parts of surfactant；
1.5 parts of tartaric acid；
1 part of calcium ion compensation；
2 parts of polycarboxylate water-reducer；
1 part of cellulose ether；
Wherein, the quartz sand is compounded to obtain by 40~70 mesh, 70~100 mesh and 100~140 mesh, compounding weight ratio tool
Body is 1:2:1；Surfactant is dodecyl azochlorosulfonate propyl lycine；The viscosity of cellulose ether is 200~1500mPaS's
Ethoxyl methyl cellulose ether.
Comparative example 2
A kind of cementitious capillary waterproofing material is made of the raw material of following weight:
56.1 parts of portland cement；
27 parts of quartz sand；
3 parts of citric acid；
7 parts of sodium carbonate；
1 part of quick dissolved sodium silicate；
0.4 part of nano silica；
1.5 parts of tartaric acid；
1 part of calcium ion compensation；
2 parts of polycarboxylate water-reducer；
1 part of cellulose ether；
Wherein, the quartz sand is compounded to obtain by 40~70 mesh, 70~100 mesh and 100~140 mesh, compounding weight ratio tool
Body is 1:2:1；The viscosity of cellulose ether is the ethoxyl methyl cellulose ether of 200~1500mPaS.
Comparative example 3
A kind of cementitious capillary waterproofing material is made of the raw material of following weight:
56.5 parts of portland cement；
27 parts of quartz sand；
3 parts of citric acid；
7 parts of sodium carbonate；
1 part of quick dissolved sodium silicate；
1.5 parts of tartaric acid；
1 part of calcium ion compensation；
2 parts of polycarboxylate water-reducer；
1 part of cellulose ether；
Wherein, the quartz sand is compounded to obtain by 40~70 mesh, 70~100 mesh and 100~140 mesh, compounding weight ratio tool
Body is 1:2:1；The viscosity of cellulose ether is the ethoxyl methyl cellulose ether of 200~1500mPaS.
From Table 1 and Table 2, the cement-base infiltration crystallization type water-proof modified based on nano silica-base material according to the present invention
Material is remarkably improved the waterproof impervious characteristic of concrete or mortar matrix, the work in MATRIX CRACKING infiltration, in waterproof material
Property substance play a role, penetrant crystalline repair matrix crack hole.Compared with publication, because adding in formula of the invention
Nano silica-base material, so in secondary impermeability performance, active material permeability, crystallinity and repairing the side such as crack and durability
Face is substantially better than other products in the market, particularly, improves production using nano silicon-based modified material and surfactant etc.
The waterproof repairing effect of product is the innovative point of this product.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be of the invention
Within protection scope.
Claims (10)
1. a kind of cementitious capillary waterproofing material modified based on nano silica-base material, which is characterized in that including following
The component of parts by weight: 45-65 parts of cement, 14-32 parts of quartz sand, 5-10 parts of retarder, 0.1-0.4 parts of nano silica-base material,
2-9 parts of crystalline deposit agent, 0.5-5 parts of surfactant, 0.5-2 parts of complexing agent, 1-5 parts of calcium ion compensation, water-reducing agent 0.5-2
Part, 0.2-2 parts of cellulose ether.
2. a kind of cementitious capillary waterproofing material modified based on nano silica-base material according to claim 1,
It is characterized in that, the cement is P.O.52.5 portland cement.
3. a kind of cementitious capillary waterproofing material modified based on nano silica-base material according to claim 1,
It is characterized in that, the retarder is the mixture of citric acid and sodium carbonate, the two is that 1:1~2 are added according to weight ratio.
4. a kind of cementitious capillary waterproofing material modified based on nano silica-base material according to claim 1,
It is characterized in that, the nano silica-base material is powdered nanoparticles silica, neutral silica dispersions or alkaline nano two
The one or more of them of silica dispersion liquid, the nano silica solid content in alkaline nano silica dispersions are
10wt%~30wt%.
5. a kind of cementitious capillary waterproofing material modified based on nano silica-base material according to claim 1,
It is characterized in that, the crystalline deposit agent is quick dissolved sodium silicate and/or sodium carbonate.
6. a kind of cementitious capillary waterproofing material modified based on nano silica-base material according to claim 1,
It is characterized in that, the surfactant is dodecyl ethyoxyl sulfobetaines or dodecyl azochlorosulfonate propyl lycine.
7. a kind of cementitious capillary waterproofing material modified based on nano silica-base material according to claim 1,
It is characterized in that, the complexing agent is levotartaric acid, dextrotartaric acid, mesotartaric acid, two water levotartaric acid sodium two
The one or more of them of sodium, ethylenediamine tetra-acetic acid, disodium ethylene diamine tetraacetate or tetrasodium ethylenediamine tetraacetate.
8. a kind of cementitious capillary waterproofing material modified based on nano silica-base material according to claim 1,
It is characterized in that, the calcium ion compensation is calcium hydroxide；
The water-reducing agent is Early-strength polycarboxylate superplasticizer.
9. -8 any a kind of cement-base infiltration crystallization type water-proof modified based on nano silica-base material according to claim 1
The preparation method of material, which is characterized in that all raw materials are watered after mixing evenly, obtain coating shape substance, then coated
Cement concrete surface to get arrive purpose product.
10. a kind of cement-base infiltration crystallization type water-proof modified based on nano silica-base material a method as claimed in any one of claims 1-8
Application of the material in water conservancy project or prevention of marine concrete structures or underground concrete structure.
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