CN110041036A - A kind of alkali-activated carbonatite concrete material being specially adapted for underwater casting - Google Patents
A kind of alkali-activated carbonatite concrete material being specially adapted for underwater casting Download PDFInfo
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- CN110041036A CN110041036A CN201910213784.9A CN201910213784A CN110041036A CN 110041036 A CN110041036 A CN 110041036A CN 201910213784 A CN201910213784 A CN 201910213784A CN 110041036 A CN110041036 A CN 110041036A
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- alkali
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- activated carbonatite
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Classifications
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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
- C04B28/08—Slag cements
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/74—Underwater applications
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A kind of alkali-activated carbonatite concrete material being specially adapted for underwater casting, belongs to the preparation method applied to alkali-activated carbonatite concrete.This method is using slag, white lime as cementitious material, medium coarse sand, rubble are respectively thin, coarse aggregate, using NaOH and liquid sodium silicate as exciting agent, then polyacrylamide is mixed as underwater inseparable powder, prepare a kind of sharp concrete material of the alkali that can directly carry out underwater casting.The material has underwater non-dispersible characteristic, can directly carry out underwater casting.Underwater casting alkali-activated carbonatite concrete is not likely to produce the phenomenon that dispersion, isolation simultaneously, mitigates and pollutes caused by construction waters, hence it is evident that promotes the pouring quality of underwater concrete.Therefore, the invention of underwater casting alkali-activated carbonatite concrete material can be accelerated construction progress obviously, significantly reduce the difficulty and cost of underwater construction, have significant environmental benefit and social benefit.
Description
Technical field
A kind of alkali-activated carbonatite concrete material being specially adapted for underwater casting
Background technique
In order to further expand living space and development and utilization Underwater resources, people build various in different waters
Engineering.Since Underwater Engineering is influenced by natural conditions such as landform, geology, the hydrology, meteorologies, underwater project construction is caused to have
The feature that intensity is high, technology is complicated and difficulty is big, so the material that underwater project construction pours must have excellent performance.
Currently, material used in engineering construction is mainly cement concrete under water in China.However, underwater casting cement concrete is deposited
In aggregate and the problems such as cementitious material is easily separated, bleeding, the pouring quality of cement concrete is seriously affected, concrete is hindered
The development of intensity, and serious environmental pollution is caused to construction waters.Therefore, what people were urgent seeks a kind of specially suitable water
Under the New Style Concrete Materials that pour, to solve problems caused by underwater casting cement concrete.
Alkali-activated material is a kind of novel inorganic nonmetallic materials that new development in recent years is got up, and this kind of material is mostly with natural
Aluminium silicate mineral or industrial solid wastes are primary raw material, mixed with other mineral admixtures and appropriate bases silicate solutions
It closes, under field conditions (factors) maintenance molding, is a kind of cementitious material bonded by aluminosilicate gelling component.With cement cementitious material
It compares, alkali-activated material has the advantages that intensity is high, setting time is short, is not easy to pollute, cohesiveness is good and water-retaining property is strong,
It is more suitable for carrying out underwater casting.If therefore can further be modified to alkali-activated material, it is made to have underwater non-dispersible characteristic,
So alkali-activated material would be possible to substitution cement and the special building material as a kind of special suitable underwater casting, swash to alkali
The application of hair material is of great significance with popularization.
This patent uses industrial solid castoff (slag) as the cementitious material for preparing alkali-activated carbonatite concrete, thick in
Sand, rubble are aided with suitable liquid sodium silicate and sodium hydroxide conduct as preparing thin, the coarse aggregate of alkali-activated carbonatite concrete
Exciting agent, then suitable polyacrylamide is mixed as underwater inseparable powder, prepare a kind of alkali of special suitable underwater casting
Excite concrete material.Underwater casting alkali-activated carbonatite concrete material has underwater non-dispersible characteristic, can directly carry out underwater
It pours, hence it is evident that the phenomenon that alleviating aggregate separated and bleeding, and water body will not be polluted.Alkali-activated carbonatite concrete is adopted simultaneously
It is primary raw material with industrial solid castoff, can have both eliminated environmental pollution caused by industrial solid castoff bulk deposition and ask
Topic, and can be relieved and cement is depended on unduly, reduction consumes non-renewable resources excessively, the energy such a for China
The in short supply and more serious country of environmental pollution is of great significance.
Summary of the invention
Technical problem: the purpose of the present invention is overcome underwater casting cement concrete asking there are aggregate separated and bleeding
Topic is respectively thin, coarse aggregate using industrial solid castoff (slag) as cementitious material, medium coarse sand, rubble, with NaOH and liquid
Sodium metasilicate is exciting agent, then mixes suitable polyacrylamide as inseparable powder, prepares one kind and is specially adapted for pouring under water
The alkali-activated carbonatite concrete material built.
Technical solution: a kind of alkali-activated carbonatite concrete material being specially adapted for underwater casting, raw material composition and quality
Percentage is as follows: cementitious material is the (313.5-264kg/m of volume of granulated blast-furnace slag micropowder 95%-80%3)；Levigate ripe stone
(16.5-the 66kg/m of volume of ashes 5%-20%3)；Fine aggregate is medium coarse sand (volume 651kg/m3)；Coarse aggregate is that rubble (is mixed
Measure 1056kg/m3)；Exciting agent is liquid sodium silicate (the volume 88kg/m of modulus 1-33)；Piece alkali (NaOH volume 17.6kg/m3)；
Water (volume 92.4kg/m3)；Underwater inseparable powder is the (6.6-33kg/m of volume of polyacrylamide 2%-10%3)。
Use a kind of above-mentioned non-dispersible alkali-activated carbonatite concrete material for being specially adapted for underwater casting: including weighing ingredient
And hybrid technique, preparation process and casting craft, the specific method is as follows:
(1) ingredient and hybrid technique are weighed: load weighted NaOH being added in mixing water first, in accordance with match ratio, is stirred
It mixes uniformly and stands cooling；Granulated blast-furnace slag micropowder, hydrated lime in powder and polyacrylamide are subjected to weighing ingredient simultaneously, so
Three kinds of materials are put into batch mixer afterwards and are mixed 5 minutes, uniform mixture is formed；
(2) preparation process: agitated kettle is added in the NaOH solution that will be cooled to room temperature, and mixture is then added, first stirs 10 slowly
Second stirs 20 seconds fastly again.It adds liquid sodium silicate and medium coarse sand and stirs fastly 30 seconds, be eventually adding rubble and stir 30 seconds fastly, Ji Kezhun
It is standby to pour；
(3) casting craft: the alkali-activated carbonatite concrete material for preparing completion can directly carry out underwater casting.
The miberal powder is to meet S95 grades of graining blast-furnace cinder micro-powders, granulated blast-furnace as defined in GB/T 18046-2008 standard
Slag is handled through iron removal by magnetic separation, and ball milling reaches specific surface area >=400m2/ kg, wherein superfine granule of the partial size less than 30 μm
Change blast-furnace cinder micro-powder and accounts for 90% of gross mass or more.
The white lime is hydrated lime in powder of the calcium lime powder after sufficiently resolution, drying, the screen over-size of 0.08mm square hole screen
It is 0.
The liquid sodium silicate exciting agent is the exciting agent that modulus is between 1.0-3.0, Baume degrees is between 37 ° -41 °.
The NaOH is piece alkali, technical grade, purity >=95%.
The utility model has the advantages that the present invention is using S95 grades of graining blast-furnace cinder micro-powders and hydrated lime in powder as cementitious material, medium coarse sand with it is broken
Stone is respectively fine aggregate and coarse aggregate, auxiliary to mix suitable polyacrylamide conduct using liquid sodium silicate and NaOH as exciting agent
Underwater inseparable powder, prepares a kind of alkali-activated carbonatite concrete material for being specially adapted for underwater casting.Alkali-activated carbonatite concrete with
Industrial solid castoff is primary raw material, can replace cement concrete, slows down cement manufacture and disappears to the too fast of lime stone raw material
Consumption, turns waste into wealth, and successive elimination industrial solid castoff accumulates brought various problem of environmental pollutions, protects environment, has
Significant environmental benefit and social benefit.It has the advantages that compared with prior art
1) underwater casting can directly be carried out
Conventional cement concrete is influenced directly to carry out underwater casting by aggregate separated and bleeding, and alkali-activated carbonatite
Concrete is excited by liquid sodium silicate and NaOH, and workability is substantially better than cement concrete, be not likely to produce aggregate separated and
The phenomenon that bleeding.The incorporation of polyacrylamide simultaneously makes alkali-activated carbonatite concrete have underwater non-dispersible characteristic, can directly into
Row underwater casting.This is because polyacrylamide is a kind of long linear organic high molecular polymer, a large amount of freedom can be absorbed
Water and alkali-activated carbonatite gel particle stretch long linear polymer chain constantly, form the netted organic high score of closed solid space
Sub- polymer.Spatial networks organic high molecular polymer can effectively seal alkali-activated carbonatite concrete up for safekeeping, make alkali-activated carbonatite concrete without
Method is dissolved each other with Free water.
2) consumption of non-renewable resources is reduced
Alkali-activated carbonatite concrete generallys use industrial solid castoff as cementitious material, can be done step-by-step and replace to cement
In generation, reduces the demand to cement.Therefore, the application of alkali-activated carbonatite concrete can not only alleviate manufacture of cement to lime stone, clay
And the too fast consumption of the energy, mitigate high energy consumption, high pollution problem brought by manufacture of cement, and can turn waste into wealth, by
Step eliminates various problem of environmental pollutions brought by industrial solid castoff bulk deposition.
3) it accelerates construction progress, reduces the difficulty and cost of construction
Since cement concrete can not directly carry out underwater casting, lead to underwater project construction often and have that difficulty is big, work
Phase length, disadvantage at high cost.However alkali-activated carbonatite concrete has underwater non-dispersible characteristic, can directly carry out underwater casting, it is bright
It is aobvious to simplify working procedure, difficulty of construction is reduced, is accelerated construction progress, construction cost is significantly reduced.
4) significant environmental benefit and social benefit
Underwater casting alkali-activated carbonatite concrete has underwater non-dispersible characteristic, and underwater casting alkali-activated carbonatite concrete is effectively relieved
The dispersion of generation and segregation phenomenon, hence it is evident that reduce concreting and polluted caused by construction waters, there is significant Environmental Effect
Benefit.The recycling of waste not only may be implemented using industrial solid castoff as cementitious material in alkali-activated carbonatite concrete simultaneously
It utilizes, and cement concrete can be substituted, reduce the demand to cement, generated social benefit will be unable to estimate.
Advantage: the present invention, using NaOH and liquid sodium silicate as exciting agent, is aided with poly- using slag, white lime as primary raw material
Acrylamide is underwater inseparable powder, prepares a kind of sharp concrete material of the alkali that can directly carry out underwater casting, alternative water
Cement concrete directly carries out underwater casting, gradually reduces the demand to cement, alleviates manufacture of cement bring high energy consumption, high pollution
Problem.Underwater casting alkali-activated carbonatite concrete has underwater non-dispersible characteristic simultaneously, hence it is evident that accelerates construction progress, significant decrease is applied
Work difficulty and cost have significant environmental benefit and social benefit.
Specific embodiment
Embodiment 1: a kind of alkali-activated carbonatite concrete material being specially adapted for underwater casting, raw material composition and quality percentage
Than as follows: cementitious material is S95 grades of (the volume 313.5kg/m of graining blast-furnace cinder micro-powder 95%3)；Levigate hydrated lime in powder 5% (is mixed
Measure 16.5kg/m3)；Liquid sodium silicate (the volume 88kg/m that modulus is 2.753)；Piece alkali (NaOH volume 17.6kg/m3)；Water (is mixed
Measure 92.4kg/m3)；(the volume 6.6kg/m of polyacrylamide 2%3)；Fine aggregate is medium coarse sand (volume 651kg/m3)；Coarse aggregate is
Rubble (volume 1056kg/m3)。
Table 1 tests match ratio kg/m3
Using a kind of above-mentioned alkali-activated carbonatite concrete material for being specially adapted for underwater casting, preparation process includes weighing to match
Material and hybrid technique, preparation process and casting craft, the specific method is as follows:
(1) ingredient and hybrid technique are weighed: load weighted NaOH being added in mixing water first, in accordance with match ratio, is stirred
It mixes and stands cooling；Slag micropowder, hydrated lime in powder and polyacrylamide are subjected to weighing ingredient simultaneously, then by three kinds of materials
It is put into batch mixer and mixes 5 minutes, form uniform mixture.
(2) preparation process: agitated kettle is added in the NaOH solution that will be cooled to room temperature, and mixture is added, and first stirs slowly 10 seconds
Then it stirs fastly 20 seconds.Then liquid sodium silicate and medium coarse sand is added and stirs 30 seconds, be eventually adding rubble and stir fastly 30 seconds fastly
Preparation pours.
(3) casting craft: the alkali-activated carbonatite concrete material for preparing completion can directly carry out underwater casting.According to strong concrete
It spends check evaluation criterion (GB/T50107-2010), it is as shown in table 4 to measure its compression strength.
Embodiment 2: preparation method is same as Example 1, slightly.The difference is that: described one kind is specially adapted for water
Under pour alkali-activated carbonatite concrete material composition and its mass percent it is as follows: cementitious material be S95 grades of granulated blast-furnace slags it is micro-
(the volume 297kg/m of powder 90%3)；；Levigate 10% (volume 33kg/m of hydrated lime in powder3)；The liquid sodium silicate that modulus is 2.75 (is mixed
Measure 88kg/m3)；Piece alkali (NaOH volume 17.6kg/m3)；Water (volume 92.4kg/m3)；(the volume 16.5kg/ of polyacrylamide 5%
m3)；Fine aggregate is medium coarse sand (volume 651kg/m3)；Coarse aggregate is rubble (volume 1056kg/m3)。
Table 2 tests match ratio kg/m3
Embodiment 3: preparation method is same as Example 1, slightly.The difference is that: described one kind is specially adapted for water
Under pour alkali-activated carbonatite concrete material composition and its mass percent it is as follows: cementitious material be S95 grades of granulated blast-furnace slags it is micro-
(the volume 264kg/m of powder 80%3)；；Levigate 20% (volume 66kg/m of hydrated lime in powder3)；The liquid sodium silicate that modulus is 2.75 (is mixed
Measure 88kg/m3)；Piece alkali (NaOH volume 17.6kg/m3)；Water (volume 92.4kg/m3)；(the volume 33kg/ of polyacrylamide 10%
m3)；Fine aggregate is medium coarse sand (volume 651kg/m3)；Coarse aggregate is rubble (volume 1056kg/m3)。
Table 3 tests match ratio kg/m3
4 different mixture ratio alkali-activated carbonatite concrete performance of table
Claims (6)
1. a kind of alkali-activated carbonatite concrete material for being specially adapted for underwater casting of the present invention, raw material composition and mass percent are such as
Under: cementitious material is the (313.5-264kg/m of volume of granulated blast-furnace slag micropowder 95%-80%3)；Levigate hydrated lime in powder
5%-20% (16.5-66kg/m of volume3)；Fine aggregate is medium coarse sand (volume 651kg/m3)；Coarse aggregate is rubble (volume
1056kg/m3)；Exciting agent is liquid sodium silicate (the volume 88kg/m of modulus 1-33)；Piece alkali (NaOH volume 17.6kg/m3)；Water
(volume 92.4kg/m3)；Underwater inseparable powder is the (6.6-33kg/m of volume of polyacrylamide 2%-10%3)。
2. using a kind of above-mentioned alkali-activated carbonatite concrete material for being specially adapted for underwater casting, including weighing ingredient and mixing work
Skill, preparation process and casting craft, the specific method is as follows:
(1) ingredient and hybrid technique are weighed: load weighted NaOH being added in mixing water first, in accordance with match ratio, stirring is equal
It is even and stand cooling；Granulated blast-furnace slag micropowder, hydrated lime in powder and polyacrylamide are subjected to weighing ingredient simultaneously, then will
Three kinds of materials are put into batch mixer and mix 5 minutes, form uniform mixture；
(2) preparation process: agitated kettle is added in the NaOH solution that will be cooled to room temperature, and mixture is then added, first stirs 10 seconds slowly again
It stirs fastly 20 seconds.It adds liquid sodium silicate and medium coarse sand and stirs 30 seconds, be eventually adding rubble and stir fastly 30 seconds fastly, that is, be ready for pouring
It builds；
(3) casting craft: the alkali-activated carbonatite concrete material for preparing completion can directly carry out underwater casting.
3. the miberal powder is to meet S95 grades of graining blast-furnace cinder micro-powders, granulated blast-furnace mine as defined in GB/T 18046-2008 standard
Slag is handled through iron removal by magnetic separation, and ball milling reaches specific surface area >=400m2/ kg, wherein superfine graining mine of the partial size less than 30 μm
Slag micro mist accounts for 90% of gross mass or more.
4. the hydrated lime in powder is hydrated lime in powder of the calcium lime powder after sufficiently resolution, drying, the screen over-size of 0.08mm square hole screen
It is 0.
5. the liquid sodium silicate exciting agent is the exciting agent that modulus is between 1.0-3.0, Baume degrees is between 37 ° -41 °.
6. NaOH described in is piece alkali, technical grade, purity >=95%.
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Cited By (2)
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| CN111574166A (en) * | 2020-05-22 | 2020-08-25 | 大连交通大学 | Alkali-activated cementing material and preparation method thereof |
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Application publication date: 20190723 |