CN106542762A - Efficient Sulfate corrosion-resistant concrete additive and preparation method thereof - Google Patents
Efficient Sulfate corrosion-resistant concrete additive and preparation method thereof Download PDFInfo
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- CN106542762A CN106542762A CN201610872028.3A CN201610872028A CN106542762A CN 106542762 A CN106542762 A CN 106542762A CN 201610872028 A CN201610872028 A CN 201610872028A CN 106542762 A CN106542762 A CN 106542762A
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/61—Corrosion inhibitors
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Abstract
The invention discloses a kind of efficient Sulfate corrosion-resistant concrete additive and preparation method thereof, technical scheme includes the raw material of following parts by weight：15 25 parts of barium salt, 5 10 parts of sorbierite, 15 30 parts of calcined diatomite, 0.5 1.0 parts of grinding aid, 30 50 parts of silicon ash, 10 20 parts of superfined flyash, 1.0 2.0 parts of water reducer.The present invention can reduce concrete contraction crack itself, raising packing, the permanently effective agent on crack resistance of concrete polymorphic type that greatly improves and corrode.
Description
Technical field
The present invention relates to building material field, specifically a kind of efficiently Sulfate corrosion-resistant concrete additive and
Its preparation method.
Background technology
China is vast in territory, and geology and weather conditions change various, sulfate concentration in the soil and water quality of each department
Change from hundreds of to tens of thousands of ppm.Currently, China is in development of the West Regions, rejuvenating the northeast and " band is all the way " Major Strategic
Planning implementation period, substantial amounts of capital construction sequentially activate across the Important Project in region, transnational border with some, such as transfer natural gas from the west to the east
And west-to-east power transmission etc., and the Qinghai-Tibet Railway having been brought to completion etc..But under China's geology and climatic environment, concrete is easily sent out
A series of sulfate attack destructions of life, and the different manifestations according to region with weather go out different types of erosion damage.Therefore
Research with regard to multifunctional efficient sulfate resistance concrete additive just has great meaning.
At present, common form of sulfate attack has gypsum mould, entringite type, thaumasite type.There is calcium in concrete
The reason for aluminite type and gypsum mould sulfate attack, is mainly due to hydrogen in the sulfate ion in environment and concrete water mudstone
Calcium oxide reaction generates gypsum, and then generates entringite with drated calcium aluminate reaction, and its destructive characteristics is concrete expansion, opens
Split.When concrete local environment temperature is relatively low and there is carbonate, concrete can occur TSA
Destruction.
Low C is used mainly for prophylactico-therapeutic measures of the gypsum mould with entringite type sulfate attack3The sulfate resistance of A contents
Cement is corroded, while using substantial amounts of mineral admixture, such as slag, flyash etc..The method can effectively delay concrete
The process of generation sulfate attack, but easily cause the decay of the correlated performances such as concrete frost resistance and mechanical property, and mix
Plus breeze, during this kind of sa admixture of flyash, its prevention effect is larger with material quality and fineness correlation, it is impossible to make
The wider product of standby adaptability.
When concrete occurs TSA to be destroyed, the presence of aluminium phase can substantially speed up the erosion
The speed of destruction, and aluminium content can also occur the type erosion damage when extremely low.The measure of prevention type erosion damage is main
Using with gypsum mould and entringite type identical means of prevention, and for the type corrode inhibitor research it is considerably less
See.
At present, Concrete Resist Reinforcing Sulfate Corrosion suppresses the research of material to have been reported both at home and abroad.Such as《It is a kind of mixed for cement
Coagulate the resisting erosion of sulfate modifying agent of soil》(CN201510706442.2) disclose cement concrete resisting erosion of sulfate modifying agent
Preparation method：50～70 parts of metakaolin, 15～30 parts of calcined hydrotalcite, 10～20 parts of flyash, 0～10 part of lime stone；
《A kind of Concrete Resist Reinforcing Sulfate Corrosion additive and preparation method thereof》(CN201510473623.5) disclose a kind of concrete
Resisting erosion of sulfate additive, is made up of the raw material of following weight fraction：30～50 parts of barium base modified alta-mud, kaolin 20
～40 parts, 20～30 parts of hydrotalcite powder, 10～15 parts of solid sodium silicate；《The formula of concrete sulfate resistance agent and preparation
Technique》(CN201019006013.9) disclose a kind of formula of concrete sulfate resistance agent：30～50 parts of ferric nitrate,
Ferrous nitrate, the concentration of magnesium nitrate or one kind therein, 20～40 parts of barium nitrate, 0.5～10 part of sodium metasilicate, oxychloride lithium 5～
30～60 parts of 10 parts, 1～5 part of Sodium Benzoate, flyash or ground blast furnace slag.In above-mentioned file, Main Function mechanism is all to improve material
Material packing reduces the intrusion of harmful ion, while a small amount of sulfate radical example for invading is solidified, being capable of suitable control sulphur
The speed that hydrochlorate corrodes.But said method chemically angle can not suppress entringite (expansion sources) to generate, while mixed without control
The function that solidifying soil shrinks, and TSA can not be suppressed.
As long as TSA formation condition meets, slowly will react, the type is invaded
Erosion additive needs chemically aspect to suppress the formation of its crystal, such as patent《A kind of TSA inhibitor
And preparation method and application》The TSA inhibitor of announcement：The patent is mainly for thaumasite
This special shape erosion damage and design, inhibiting mechanism i.e. from physics with chemistry two aspect reduction sulfate ion danger
Evil, but the formation of thaumasite crystal cannot be suppressed from microcosmic angle, and split caused by uncontrollable concrete itself shrinks
Seam, therefore its improvement and the term of validity still need to inspection.
The content of the invention
The invention aims to solve above-mentioned technical problem, there is provided one kind can reduce concrete contraction crack itself,
Improve packing, the efficient Sulfate corrosion-resistant concrete of the permanently effective performance for greatly improving the erosion of agent on crack resistance of concrete polymorphic type
Additive.
The present invention also provides a kind of process is simple, low production cost, reliability high efficient Sulfate corrosion-resistant concrete
The preparation method of additive.
Technical scheme includes the raw material of following parts by weight：Barium salt 15-25 parts, sorbierite 5-10 parts, calcined diatomite 15-
30 parts, grinding aid 0.5-1.0 parts, silicon ash 30-50 part, superfined flyash 10-20 parts, water reducer 1.0-2.0 parts.
Described barium salt is brium carbonate and barium hydroxide mixture, and barium hydroxide is 3 with the mixing quality ratio of brium carbonate:
1—1.5。
The calcined diatomite is adopted and is obtained with the following method：Diatomite is crushed to into average grain diameter 3-6mm, in 650-750
2 hours are calcined at DEG C, room temperature is quickly cooled to, is obtained calcined diatomite.
Grinding aid is polymeric polyols alcohols, triethanolamine class, one or more in triisopropanolamine class.
The specific surface area of the silicon ash is more than 15000m2/ Kg, wherein dioxide-containing silica are more than 95%.
Characterized in that, the average grain diameter of the superfined flyash is less than 2 μm.
The water reducer be melamine series solid-state powdery water-reducing agent, its water-reducing rate be more than 14%, less than 20%, moisture content
Less than 2%, pH value 9～14.
The preparation method of efficiently Sulfate corrosion-resistant concrete additive of the invention,
Comprise the steps：
(1) diatomaceous pretreatment：Calcine after broken to diatomite, after being quickly cooled to room temperature, obtain calcined diatomite；
(2) preparation of barium salt：By barium hydroxide with brium carbonate according to mass ratio 3:1-1.5 carry out being mixed to get barium salt；
(3) barium salt 15-25 parts, grinding aid 0.5-1.0 parts, sorbierite 5-10 parts, calcined diatomite 15- are weighed according to proportioning
30 parts, the wet grinding that adds water is to specific surface area 400-600m2/ Kg, obtains slurry；
(4) the slurry drying for obtaining step 3 obtains powder；
(5) weigh silicon ash 30-50 part, superfined flyash 10-20 parts, water reducer 1.0-2.0 parts and powder according to proportioning to mix
Conjunction uniformly obtains additive.
In the step (1), diatomite is crushed to into average grain diameter 3-6mm, 2 hours is calcined at 650-750 DEG C, soon
Speed is cooled to room temperature, obtains calcined diatomite.
When additive of the present invention is used, volume is the 5%-20% of Binder Materials quality in concrete.
The additive of the present invention has the working condition for adjusting fresh concrete, reduces the shrinkage value of maturing, carries
The characteristic of high concrete endurance quality.Test prove, the present invention additive can significantly improve the working condition of concrete with it is hard
Material internal structure after change, and the characteristic that concrete resists various sulfate attack destructions can be given.It is of the invention relative
Have the following advantages in prior art：
(1) superfined flyash is combined by the present invention with silicon ash, is aided with calcined diatomite as mineral admixture, is used for
Improve the internal structure of the service behaviour and maturing of fresh concrete, so as to improve the sulphate-corrosion resistance of concrete
Energy.The wherein addition of superfined flyash can be obviously improved working performance of concrete, closely knit after concrete hardening so as to improve
Degree, simultaneously because its fineness is thinner, so as to have higher pozzolanic activity.Calcined diatomite, superfined flyash and silicon ash
Mix in concrete, on the one hand can consume the calcium hydroxide of internal system, improving affects the interface mistake of endurance performance of concrete
Area is crossed, the hole inside the further packing material of hydration reaction is on the other hand participated in.Above-mentioned effect can delay harmful ion
The transmission of inside concrete, so as to improve the sulphate-corrosion resistance energy of concrete.
(2) calcined diatomite used in the present invention, by the diatomite particle of average grain diameter 3-6mm at 650-750 DEG C
Calcine under environment 2 hours and be obtained, the diatomite after roasting can make internal silica structure depolymerization, so as to have certain activity.
Calcined diatomite is loose structure, can store substantial amounts of moisture, when calcined diatomite is mixed in concrete, can be mixed
Persistently supplied water under solidifying soil hardening process exsiccosis, so that concrete has Self-curing and repairs internal microcrack
Effect.So as to improve concrete density, Sulfate Resistance of Concrete energy is improved, the addition of the calcined diatomite is
15-30 parts, preferred 18-22 parts can excessively cause the increase of concrete water requirement to reduce concrete strength, and I haven't seen you for ages excessively as the later stage supplies
Water deficiency causes the effect of selfreparing internal fissure to weaken.
(3) on the one hand barium hydroxide and brium carbonate compound use are invaded into coagulation using barium hydroxide solidification in the present invention
Sulfate ion inside soil, so as to forming Barium sulfate crystals and filling harmful ion invasive channel；Another aspect brium carbonate has
There is stronger decomposition ettringite, so as to very effective chemically aspect prevents the shape of sulfate attack product
Into.So as to substantially improve the sulphate-corrosion resistance energy of concrete.The barium hydroxide compares 3 with the mixing quality of brium carbonate:1—
1.5, preferably 3：1.3.Can excessively weaken decomposition of the brium carbonate to entringite, cross that I haven't seen you for ages and weaken barium hydroxide to sulfate radical from
Used by the solidification of son.In raw material, the addition of barium salt is 15-25 parts, and preferred 18-22 parts can excessively cause working performance of concrete
Reduce, high cost.Crossing that I haven't seen you for ages causes additive to reduce concrete durability improvement result.
(4) sorbierite is used to improve Sulfate Resistance of Concrete energy by the present invention, single by solid before changing
Change sulfate ion and improve the thinking that concrete density hinders sulfate ion to invade.The present invention is using six in sorbierite
Individual hydroxyl so as to substitute or originally belong to sulfuric acid location of root in entringite and thaumasite, so as to reach suppression
The effect that entringite is generated with thaumasite.Therefore, the additive has suppression thaumasite and entringite type sulfate
The double effectses of erosion.The addition of sorbierite is 5-10 parts, can excessively cause concrete coagulating time long, and I haven't seen you for ages excessively causes
Additive reduces even losing inhibition to the inhibitory action of thaumasite.
(5) sorbierite, barium salt and calcined diatomite are carried out wet grinding process in the presence of grinding aid by the present invention, profit
Sorbierite and barium salt are adsorbed onto the inside in hole with the loose structure in calcined diatomite, make the additive that there is permanent timeliness
Property.
(6) additive volume of the present invention is low, and mixing the present invention can make the mobility of concrete increase more than 10%；Coagulation
Native contraction fissure/internal void reduces by more than 10%；Compression strength improves more than 20% within 28 days；Concrete Resist Reinforcing Sulfate Corrosion system
Up to more than 0.95, the sulphate-corrosion resistance of concrete can be greatly improved number.
Specific embodiment
The barium salt adopted in the following example is barium hydroxide and brium carbonate, the wherein mass ratio of barium hydroxide and brium carbonate
For 3：1-1.5；Sorbierite is powder, and wherein D-sorbite content is more than 99%；Calcined diatomite is obtained by the following method：(1)
Diatomite is crushed to average grain diameter 3-6mm, and 2 hours are calcined at 650-750 DEG C, is quickly cooled to 4 room temperatures and is obtained；Grinding aid
It is for one or more in polymeric polyols alcohols, triethanolamine class, triisopropanolamine class, commercially available；The specific surface area of silicon ash is more than
15000m2/ Kg, wherein dioxide-containing silica are more than 95%, commercially available；The average grain diameter of superfined flyash is less than 2 μm；Water reducer is
Melamine series solid-state powdery water-reducing agent, its water-reducing rate are more than 14%, and less than 20%, moisture content is less than 2%, pH value 9～14 (20
DEG C, 20% liquid).
Test raw material：Cement is adopted and meets the reference cement that GB 8076-2008 specify.Sand is adopted and meets GB/
The normal sand that T17671-1999 specifies.Test water meets the requirement in JGJ63.
Test method：The standard mortar divergence method that fluidity detection is specified using GB50119-2013 is tested；By force
Degree test is with detection using the regulation in GB/T17671-1999；The measure of material resisting erosion of sulfate coefficient adopts GB/T749-
Regulation in 2008；Porosity is tested using mercury injection method.
Embodiment 1：
Raw materials by weight portion is calculated as 15 parts of barium salt, 5 parts of sorbierite, 30 parts of calcined diatomite, 0.5 part of grinding aid, silicon ash
30 parts, 18 parts of superfined flyash, 1.5 parts of water reducer.
Preparation method is comprised the following steps：
(1) diatomaceous pretreatment：Average grain diameter 3-6mm particle is crushed to diatomite and under 650-750 DEG C of environment
2 hours of calcining, it is after being quickly cooled to room temperature, standby.
(2) preparation of barium salt：By barium hydroxide with brium carbonate according to mass ratio 3:1 is mixed, standby.
(3) according to said ratio weigh calcined diatomite in barium salt, grinding aid, sorbierite, step 1,40 parts of water be placed in it is vertical
Grind in formula wet method cell grinder, to specific surface area 400-600m2/Kg。
(4) slurry that step 3 is obtained is placed in in dryer (105 DEG C of temperature) drying, it is standby.
(5) weigh compound in silicon ash, superfined flyash, water reducer, step 4 according to aforementioned proportion to be well mixed.
The related performance indicators of the additive for obtaining such as table 1：Wherein, control sample is the sand for not filling additive of the present invention
Slurry.
1 related performance indicators of table
Embodiment 2：
Raw materials by weight portion is calculated as 25 parts of barium salt, 8 parts of sorbierite, 22 parts of calcined diatomite, 1.0 parts of grinding aid, silicon ash
30 parts, 12 parts of superfined flyash, 2.0 parts of water reducer.
Preparation method is comprised the following steps：
(1) diatomaceous pretreatment：Average grain diameter 3-6mm particle is crushed to diatomite and under 650-750 DEG C of environment
2 hours of calcining, it is after being quickly cooled to room temperature, standby.
(2) preparation of barium salt：By barium hydroxide with brium carbonate according to mass ratio 3：1.5 mixing, it is standby.
(3) according to said ratio weigh calcined diatomite in barium salt, grinding aid, sorbierite, step 1,50 parts of water be placed in it is vertical
Grind in formula wet method cell grinder, to specific surface area 400-600m2/Kg。
(4) slurry that step 3 is obtained is placed in in dryer (105 DEG C of temperature) drying, it is standby.
(5) weigh compound in silicon ash, superfined flyash, water reducer, step 4 according to aforementioned proportion to be well mixed.
The related performance indicators of the additive for obtaining such as table 2：
2 related performance indicators of table
Embodiment 3：
Be calculated by weight as 18 parts of barium salt, 5 parts of sorbierite, 15 parts of calcined diatomite, 1.0 parts of grinding aid, 50 parts of silicon ash,
10 parts of superfined flyash, 1.0 parts of water reducer.
Follow the steps below test：
(1) diatomaceous pretreatment：Average grain diameter 3-6mm particle is crushed to diatomite and under 650-750 DEG C of environment
2 hours of calcining, it is after being quickly cooled to room temperature, standby.
(2) preparation of barium salt：By barium hydroxide and brium carbonate in mass ratio 3：1.2 mix, standby.
(3) according to said ratio weigh calcined diatomite in barium salt, grinding aid, sorbierite, step 1,45 parts of water be placed in it is vertical
Grind in formula wet method cell grinder, to specific surface area 400-600m2/Kg。
(4) slurry that step 3 is obtained is placed in in dryer (105 DEG C of temperature) drying, it is standby.
(5) weigh compound in silicon ash, superfined flyash, water reducer, step 4 according to aforementioned proportion to be well mixed.
The related performance indicators of obtained additive such as table 3：
3 related performance indicators of table
Embodiment 4：
It is calculated by weight as 20 parts of barium salt, 10 parts of sorbierite, 15 parts of calcined diatomite, 0.8 part of grinding aid, silicon ash 38
Part, 20 parts of superfined flyash, 1.2 parts of water reducer.
Follow the steps below test：
(1) diatomaceous pretreatment：Average grain diameter 3-6mm particle is crushed to diatomite and under 650-750 DEG C of environment
2 hours of calcining, it is after being quickly cooled to room temperature, standby.
(2) preparation of barium salt：By barium hydroxide and brium carbonate in mass ratio 3：1 mixes, standby.
(3) according to said ratio weigh calcined diatomite in barium salt, grinding aid, sorbierite, step 1,42 parts of water be placed in it is vertical
Grind in formula wet method cell grinder, to specific surface area 400-600m2/Kg。
(4) slurry that step 3 is obtained is placed in in dryer (105 DEG C of temperature) drying, it is standby.
(5) weigh compound in silicon ash, superfined flyash, water reducer, step 4 according to aforementioned proportion to be well mixed.
Obtained related performance indicators such as table 4：
4 related performance indicators of table
Embodiment 5：
Be calculated by weight as 17 parts of barium salt, 8 parts of sorbierite, 18 parts of calcined diatomite, 0.5 part of grinding aid, 40 parts of silicon ash,
15 parts of superfined flyash, 1.5 parts of water reducer.
Follow the steps below test：
(1) diatomaceous pretreatment：Average grain diameter 3-6mm particle is crushed to diatomite and under 650-750 DEG C of environment
2 hours of calcining, it is after being quickly cooled to room temperature, standby.
(2) preparation of barium salt：By barium hydroxide and brium carbonate in mass ratio 3：1.1 mix, standby.
(3) according to said ratio weigh calcined diatomite in barium salt, grinding aid, sorbierite, step 1,45 parts of water be placed in it is vertical
Grind in formula wet method cell grinder, to specific surface area 400-600m2/Kg。
(4) slurry that step 3 is obtained is placed in in dryer (105 DEG C of temperature) drying, it is standby.
(5) weigh compound in silicon ash, superfined flyash, water reducer, step 4 according to aforementioned proportion to be well mixed.
The related performance indicators of additive such as table 5：
5 related performance indicators of table
Embodiment 6：
Be calculated by weight as 15 parts of barium salt, 6 parts of sorbierite, 27 parts of calcined diatomite, 0.8 part of grinding aid, 40 parts of silicon ash,
10 parts of superfined flyash, 1.2 parts of water reducer.
Follow the steps below test：
(1) diatomaceous pretreatment：Average grain diameter 3-6mm particle is crushed to diatomite and under 650-750 DEG C of environment
2 hours of calcining, it is after being quickly cooled to room temperature, standby.
(2) preparation of barium salt：By barium hydroxide and brium carbonate in mass ratio 3：1.4 mix, standby.
(3) according to said ratio weigh calcined diatomite in barium salt, grinding aid, sorbierite, step 1,48 parts of water be placed in it is vertical
Grind in formula wet method cell grinder, to specific surface area 400-600m2/Kg。
(4) slurry that step 3 is obtained is placed in in dryer (105 DEG C of temperature) drying, it is standby.
(5) weigh compound in silicon ash, superfined flyash, water reducer, step 4 according to aforementioned proportion to be well mixed.
The related performance indicators of additive such as table 6：
6 related performance indicators of table
Claims (9)
1. a kind of efficient Sulfate corrosion-resistant concrete additive, it is characterised in that including the raw material of following parts by weight：Barium salt
15-25 parts, sorbierite 5-10 parts, calcined diatomite 15-30 parts, grinding aid 0.5-1.0 parts, silicon ash 30-50 part, superfined flyash
10-20 parts, water reducer 1.0-2.0 parts.
2. efficiently Sulfate corrosion-resistant concrete additive as claimed in claim 1, it is characterised in that described barium salt is carbon
Sour barium and barium hydroxide mixture, barium hydroxide are 3 with the mixing quality ratio of brium carbonate:1—1.5.
3. efficiently Sulfate corrosion-resistant concrete additive as claimed in claim 1, it is characterised in that the calcined diatomite
Adopt and obtain with the following method：Diatomite is crushed to into average grain diameter 3-6mm, 2 hours, fast quickly cooling are calcined at 650-750 DEG C
But to room temperature, obtain calcined diatomite.
4. efficiently Sulfate corrosion-resistant concrete additive as claimed in claim 1, it is characterised in that grinding aid is more for polymerization
One or more in first alcohols, triethanolamine class, triisopropanolamine class.
5. efficiently Sulfate corrosion-resistant concrete additive as claimed in claim 1, it is characterised in that the ratio table of the silicon ash
Area is more than 15000m2/ Kg, wherein dioxide-containing silica are more than 95%.
6. efficiently Sulfate corrosion-resistant concrete additive as claimed in claim 1, it is characterised in that characterized in that, institute
The average grain diameter for stating superfined flyash is less than 2 μm.
7. efficiently Sulfate corrosion-resistant concrete additive as claimed in claim 1, it is characterised in that the water reducer is three
Paracyanogen amine system solid-state powdery water-reducing agent, its water-reducing rate are more than 14%, and less than 20%, moisture content is less than 2%, pH value 9～14.
8. the preparation method of the efficient Sulfate corrosion-resistant concrete additive of a kind of any one of claim 1-7, it is characterised in that
Comprise the steps：
(1) diatomaceous pretreatment：Calcine after broken to diatomite, after being quickly cooled to room temperature, obtain calcined diatomite；
(2) preparation of barium salt：By barium hydroxide with brium carbonate according to mass ratio 3:1～1.5 carries out being mixed to get barium salt；
(3) barium salt 15-25 parts, grinding aid 0.5-1.0 parts, sorbierite 5-10 parts, calcined diatomite 15-30 are weighed according to proportioning
Part, the wet grinding that adds water is to specific surface area 400-600m2/ Kg, obtains slurry；
(4) the slurry drying for obtaining step 3 obtains powder；
(5) it is equal the mixing of silicon ash 30-50 part, superfined flyash 10-20 parts, water reducer 1.0-2.0 parts and powder to be weighed according to proportioning
It is even to obtain additive.
9. the preparation method of efficiently Sulfate corrosion-resistant concrete additive as claimed in claim 8, it is characterised in that described
In step (1), diatomite is crushed to into average grain diameter 3-6mm, 2 hours are calcined at 650-750 DEG C, room is quickly cooled to
Temperature, obtains calcined diatomite.
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| CN107324681A (en) * | 2017-06-30 | 2017-11-07 | 中建西部建设西南有限公司 | A kind of thaumasite type sulphate corrosion inhibitor and preparation method |
| CN107651896A (en) * | 2017-10-13 | 2018-02-02 | 河南省三门峡黄河大桥高速公路建设有限公司 | Chemical resistance of concrete high durability concrete and preparation method thereof |
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| CN108609934A (en) * | 2018-07-03 | 2018-10-02 | 济南大学 | A kind of high compact Sulfate corrosion-resistant concrete and preparation method thereof |
| CN108863203A (en) * | 2018-07-03 | 2018-11-23 | 济南大学 | A kind of high compact anti-erosion concrete and preparation method |
| CN109650769A (en) * | 2019-02-18 | 2019-04-19 | 天津市建筑材料科学研究院有限公司 | A kind of concrete admixture of resisting erosion of sulfate and preparation method thereof |
| CN113443848A (en) * | 2021-07-26 | 2021-09-28 | 日照联汇建材有限公司 | Anti-erosion concrete admixture and preparation method thereof |
| CN114656184A (en) * | 2022-04-14 | 2022-06-24 | 北京建筑材料科学研究总院有限公司 | Sulfate-corrosion-resistant concrete additive, preparation method thereof and concrete |
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| CN107651896A (en) * | 2017-10-13 | 2018-02-02 | 河南省三门峡黄河大桥高速公路建设有限公司 | Chemical resistance of concrete high durability concrete and preparation method thereof |
| CN107651896B (en) * | 2017-10-13 | 2020-12-18 | 衢州虎山混凝土有限公司 | Chemical-erosion-resistant high-durability concrete and preparation method thereof |
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| CN108609934A (en) * | 2018-07-03 | 2018-10-02 | 济南大学 | A kind of high compact Sulfate corrosion-resistant concrete and preparation method thereof |
| CN109650769A (en) * | 2019-02-18 | 2019-04-19 | 天津市建筑材料科学研究院有限公司 | A kind of concrete admixture of resisting erosion of sulfate and preparation method thereof |
| CN109650769B (en) * | 2019-02-18 | 2021-08-20 | 天津市建筑材料科学研究院有限公司 | Sulfate-corrosion-resistant concrete admixture and preparation method thereof |
| CN113443848A (en) * | 2021-07-26 | 2021-09-28 | 日照联汇建材有限公司 | Anti-erosion concrete admixture and preparation method thereof |
| CN114656184A (en) * | 2022-04-14 | 2022-06-24 | 北京建筑材料科学研究总院有限公司 | Sulfate-corrosion-resistant concrete additive, preparation method thereof and concrete |
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