CN108178578A - A kind of non-dispersible underwater concrete - Google Patents
A kind of non-dispersible underwater concrete Download PDFInfo
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- CN108178578A CN108178578A CN201810046011.1A CN201810046011A CN108178578A CN 108178578 A CN108178578 A CN 108178578A CN 201810046011 A CN201810046011 A CN 201810046011A CN 108178578 A CN108178578 A CN 108178578A
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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
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
- C04B24/383—Cellulose or derivatives thereof
-
- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
The invention discloses a kind of non-dispersible underwater concretes, belong to building material technical field.The concrete includes middle 350~400 parts of sand, 650~750 parts of rubble, 150~300 parts of cement, 20~50 parts of mineral additive, 5~15 parts of flocculant, 5~10 parts of water-reducing agent, 3~6 parts of swelling agent, 2~5 parts of adjustable solidification agent, 100~250 parts of water；Flocculant is made of modified methyl cellulose flocculant and polysilicate sulfuric acid ferric flocculant, and mass ratio is (5~3)：1.The advantages of it is strong that there is the non-dispersible underwater concrete of the present invention water resistant to wash ability, short construction period.
Description
Technical field
The present invention relates to a kind of non-dispersible underwater concretes, belong to building material technical field.
Background technology
So far, concrete is still one of main construction material with dosage maximum in engineering under water.Coagulation
The quality and progress that the performance of soil will directly influence Underwater Engineering.Therefore, the performance study and construction technology of underwater concrete
More and more paid attention to by engineering technological.It is well known that although cement is hydraulic material, if but concrete mix is straight
It connects and is poured into water, when it falls in water, due to the flushing action of water, aggregate will be detached with cement, be partly taken away by the water,
Part is chronically at suspended state.When cement sinks, in curdled appearance, the ability of cementing aggregate is lost.So in water
The concrete mix directly poured is generally divided into one layer of sand, gravel aggregate, one layer thin and Flocculated Cement body that intensity is very low or
Cement slurry, it is impossible to meet engine request.Therefore, underwater concrete is required in the past with being poured under conditions of environment water segregation,
And casting process cannot interrupt, and to reduce the adverse effect of water, after its hardening also to remove a certain number of intensity is not inconsistent
Close the concrete of requirement.
Traditional underwater concrete construction method usually has two classes:One kind is draining behind first cofferdam, the construction of concrete with
Land is identical, there is in advance the shortcomings of quantities is big, project cost is high, long in time limit；Another kind of is to utilize special construction equipment handle
Concrete and ambient water separate, and concrete mix is fed directly to Underwater Engineering position, mainly have tremie method, prepacked aggregate to fill
Slurry processes, open bottom container method etc. at mould bag method.These construction methods make concrete mix easily be washed away by water to cause material tight
It isolates again, cement is lost in, and concrete quality declines, while causes environmental pollution.Routinely pouring the key of underwater concrete is
Contact of the partition concrete with water as possible, but this will make construction technology become complicated, and the duration is elongated, and engineering cost greatly increases,
Moreover also it is difficult to ensure that the quality of concrete in water.With coastal waters exploitation and the construction of a large amount of under-water structure projects, especially exist
The utilization in ocean deepwater area, it is higher and higher to the quality requirement of concrete underwater casting, construction, it is therefore, underwater to tradition
With being modified for concrete, customer service problem above is very necessary.
Invention content
Present invention seek to address that underwater concrete existing easy dispersion in actual use in the prior art, influences coagulation
The complex process brought of quality and water proof construction of soil, it is long in time limit the problem of, a kind of new non-dispersible underwater concrete is provided.
For achieving the above object, technical scheme is as follows：
A kind of non-dispersible underwater concrete, it is characterised in that：Include the raw material of following parts by weights meter：Middle sand 350~400
Part, 650~750 parts of rubble, 150~300 parts of cement, 20~50 parts of mineral additive, 5~15 parts of flocculant, water-reducing agent 5~10
Part, 3~6 parts of swelling agent, 2~5 parts of adjustable solidification agent, 100~250 parts of water；Flocculant is by modified methyl cellulose flocculant and poly- silicon
Sour ferric sulfate flocculant composition, mass ratio are (5~3)：1.
The preparation method of modified methyl cellulose flocculant in the present invention is as follows：
Methylcellulose, acrylamide monomer are added in into reaction kettle, deionized water is added, is warming up to 35 DEG C, is passed through
Potassium peroxydisulfate, frerrous chloride, the ammonium persulfate of equivalent are added in after nitrogen 20min, carries out polymerisation, after polymerase 17 h, is done
It is dry, it crushes.
The preparation method of polysilicate sulfuric acid ferric flocculant in the present invention is as follows：
Sodium metasilicate plus distilled water are diluted to SiO2A concentration of 2.0%, a certain amount of sulfuric acid is then added in, adjusts pH value
Afterwards, ferrum sulfuricum oxydatum solutum is added in, is stirred evenly, drying to solid polysilicate sulfuric acid ferric flocculant.
In order to which the present invention is better achieved, further, preferably, the modified methyl cellulose flocculant and poly- silicon
The mass ratio of sour ferric sulfate flocculant is 4:1, two kinds of flocculant cooperative synergism effects of the ratio are best.
Further, the clay content of the middle sand is less than 1%；Fineness modulus is 2.4~3.0, particle size distribution range：
4.75mm, which tails over 5~7%, 2.5mm and tails over 12~15%, 1.18mm and tail over 22~25%, 0.6mm, tails over 50~54%,
0.315mm tails over 80~82%, 0.16mm and tails over 94~96%.
Further, the gill shape ＜ 8% of the rubble, clay content ＜ 0.5%；Particle size distribution range：25mm tails over 1~
2%, 20mm, which tail over 28~30%, 16mm and tail over 60~65%, 10mm and tail over 95~98%, 5mm, tails over 100%.
Further, the cement is Portland cement.
Further, the mineral additive is slag.
Further, the water-reducing agent is polycarboxylate water-reducer.
Further, the swelling agent is UEA swelling agents.
Further, the adjustable solidification agent is gypsum, can be the natural gypsum, mixed gypsum, industrial by-product specifically
One kind in gypsum.
Beneficial effects of the present invention：
(1) selection and proportion design of the present invention by raw material, on the whole so that concrete has dispersion resistance under water
And excellent Self-leveling and fillibility, specifically, the regioselective composition flocculant in the present invention, on the one hand, tool
There is high-molecular compound backbone, can be adsorbed on cement granules, therefore be formed by some work functional groups on Long carbon chain
" bridge formation " contact intersected in length and breadth, so as to which a variety of particles in concrete are linked together, forms stable Floe structure, separately
On the one hand, due to carrying hydroxyl on polymer functional group, it can and mix and stir the affinity that hydrone is formed between hydrogen bond, with hydrone and increase
Add.Composite flocculant utmostly low can increase concrete mix vicidity, effectively inhibit point of cement and aggregate
From under the premise of workability is met, guarantee concrete in water there is good water resistant to wash ability.
By adding the swelling agent and adjustable solidification agent of special ratios in the present invention, cement is made quickly to condense hardening, to shorten
Duration.
(2) in the present invention, preferably, the clay content of middle sand is less than 1%；Fineness modulus is 2.4~3.0, particle diameter distribution
Range：4.75mm, which tails over 5~7%, 2.5mm and tails over 12~15%, 1.18mm and tail over 22~25%, 0.6mm, tails over 50~54%,
0.315mm tails over 80~82%, 0.16mm and tails over 94~96%, after sand can both ensure hardening of cement in this, provides certain
Supporting role is filled, and with good mobility, improves its workability.
(3) in the present invention, preferably, the gill shape ＜ 8% of rubble, clay content ＜ 0.5%；Particle size distribution range：
25mm, which tails over 1~2%, 20mm and tails over 28~30%, 16mm and tail over 60~65%, 10mm and tail over 95~98%, 5mm, to be tailed over
100%.Gill shape is controlled in a certain range, to improve the intensity of concrete.Specifically, the rubble of gill shape can cause
The total voidage of concrete becomes larger, and is easily broken off after stress, so as to reduce the intensity of concrete, in addition, the rubble of gill shape
The frictional force of concrete can also be increased so that the workability in whipping process is poor, and wrapping property, cohesiveness is made to be deteriorated, and tend to
One direction arrangement, it is not easy to vibration compacting.And specific gradation design, it is to form best cooperation with sand in fine aggregate
Using effect provides good mobility and certain cohesiveness and water-retaining property for concrete.
Specific embodiment
The present invention is described in further detail, but the implementation of the present invention is not limited to this with reference to embodiment.
Embodiment 1
A kind of non-dispersible underwater concrete includes the raw material of following parts by weights meter：Middle 350 parts of sand, 650 parts of rubble, water
150 parts of mud, 20 parts of mineral additive, 5 parts of flocculant, 5 parts of water-reducing agent, 3 parts of swelling agent, 2 parts of adjustable solidification agent, 100 parts of water；Flocculant
It is made of modified methyl cellulose flocculant and polysilicate sulfuric acid ferric flocculant, mass ratio 5：1.
In the present embodiment, the clay content of middle sand is less than 1%；Fineness modulus is 2.4~3.0, particle size distribution range：4.75mm
It tails over 5~7%, 2.5mm and tails over 12~15%, 1.18mm and tail over 22~25%, 0.6mm and tail over 50~54%, 0.315mm and tail over
80~82%, 0.16mm tail over 94~96%.
In the present embodiment, the gill shape ＜ 8% of rubble, clay content ＜ 0.5%；Particle size distribution range：25mm tails over 1~
2%, 20mm, which tail over 28~30%, 16mm and tail over 60~65%, 10mm and tail over 95~98%, 5mm, tails over 100%.
Cement in the present embodiment is Portland cement 42.5.
Mineral additive in the present embodiment is slag.
Water-reducing agent in the present embodiment is polycarboxylate water-reducer, in the preparation process of the polycarboxylate water-reducer of the present embodiment,
Each raw material proportioning is：Hold alkenyl alkylene polyoxyethylene ether 3~5%, maleic anhydride 1.5~3%, ammonium persulfate and sulfurous acid
Hydrogen sodium 1~2%, methacrylic acid 6~8%, thioacetic acid 2~3%, vitamin C 0.5~1%, Methacrylamide 1.5~
3%th, 2- acrylamidos -2- methyl-propane sulfonic acids sodium 2~4%, sodium hydroxide 0.5~1%, water 70~82%.
Swelling agent in the present embodiment is UEA swelling agents.
Adjustable solidification agent in the present embodiment is the natural gypsum.
Embodiment 2
A kind of non-dispersible underwater concrete includes the raw material of following parts by weights meter：Middle 400 parts of sand, 750 parts of rubble, water
300 parts of mud, 50 parts of mineral additive, 15 parts of flocculant, 10 parts of water-reducing agent, 6 parts of swelling agent, 5 parts of adjustable solidification agent, 250 parts of water；Flocculation
Agent is made of modified methyl cellulose flocculant and polysilicate sulfuric acid ferric flocculant, mass ratio 3：1.
In the present embodiment, the clay content of middle sand is less than 1%；Fineness modulus is 2.4~3.0, particle size distribution range：4.75mm
It tails over 5~7%, 2.5mm and tails over 12~15%, 1.18mm and tail over 22~25%, 0.6mm and tail over 50~54%, 0.315mm and tail over
80~82%, 0.16mm tail over 94~96%.
In the present embodiment, the gill shape ＜ 8% of rubble, clay content ＜ 0.5%；Particle size distribution range：25mm tails over 1~
2%, 20mm, which tail over 28~30%, 16mm and tail over 60~65%, 10mm and tail over 95~98%, 5mm, tails over 100%.
Cement in the present embodiment is Portland cement 42.5.
Mineral additive in the present embodiment is slag.
Water-reducing agent in the present embodiment is polycarboxylate water-reducer.
Swelling agent in the present embodiment is UEA swelling agents.
Adjustable solidification agent in the present embodiment is the natural gypsum.
Embodiment 3
A kind of non-dispersible underwater concrete includes the raw material of following parts by weights meter：Middle 380 parts of sand, 700 parts of rubble, water
200 parts of mud, 30 parts of mineral additive, 10 parts of flocculant, 8 parts of water-reducing agent, 4 parts of swelling agent, 3 parts of adjustable solidification agent, 200 parts of water；Flocculation
Agent is made of modified methyl cellulose flocculant and polysilicate sulfuric acid ferric flocculant, mass ratio 4：1.
In the present embodiment, the clay content of middle sand is less than 1%；Fineness modulus is 2.4~3.0, particle size distribution range：4.75mm
It tails over 5~7%, 2.5mm and tails over 12~15%, 1.18mm and tail over 22~25%, 0.6mm and tail over 50~54%, 0.315mm and tail over
80~82%, 0.16mm tail over 94~96%.
In the present embodiment, the gill shape ＜ 8% of rubble, clay content ＜ 0.5%；Particle size distribution range：25mm tails over 1~
2%, 20mm, which tail over 28~30%, 16mm and tail over 60~65%, 10mm and tail over 95~98%, 5mm, tails over 100%.
Cement in the present embodiment is Portland cement 42.5.
Mineral additive in the present embodiment is slag.
Water-reducing agent in the present embodiment is polycarboxylate water-reducer.
Swelling agent in the present embodiment is UEA swelling agents.
Adjustable solidification agent in the present embodiment is industrial by-products gypsum.
Embodiment 4
A kind of non-dispersible underwater concrete, it is characterised in that：Include the raw material of following parts by weights meter：Middle 400 parts of sand, it is broken
750 parts of stone, 250 parts of cement, 30 parts of mineral additive, 15 parts of flocculant, 6 parts of water-reducing agent, 6 parts of swelling agent, 2 parts of adjustable solidification agent, water
250 parts；Flocculant is made of modified methyl cellulose flocculant and polysilicate sulfuric acid ferric flocculant, mass ratio 3.5：1.
In the present embodiment, the clay content of middle sand is less than 1%；Fineness modulus is 2.4~3.0, particle size distribution range：4.75mm
It tails over 5~7%, 2.5mm and tails over 12~15%, 1.18mm and tail over 22~25%, 0.6mm and tail over 50~54%, 0.315mm and tail over
80~82%, 0.16mm tail over 94~96%.
In the present embodiment, the gill shape ＜ 8% of rubble, clay content ＜ 0.5%；Particle size distribution range：25mm tails over 1~
2%, 20mm, which tail over 28~30%, 16mm and tail over 60~65%, 10mm and tail over 95~98%, 5mm, tails over 100%.
Cement in the present embodiment is Portland cement 42.5.
Mineral additive in the present embodiment is slag.
Water-reducing agent in the present embodiment is polycarboxylate water-reducer.
Swelling agent in the present embodiment is UEA swelling agents.
Adjustable solidification agent in the present embodiment is the natural gypsum.
Embodiment 5
The present embodiment and embodiment 3 difference lies in：Flocculant is polysilicate sulfuric acid ferric flocculant.
Embodiment 6
The present embodiment and embodiment 3 difference lies in：Flocculant is modified methyl cellulose flocculant.
Embodiment 7
The present embodiment and embodiment 3 difference lies in：Swelling agent and adjustable solidification agent are not included in the present embodiment.
Embodiment 8
The concrete of Examples 1 to 7 is tested for the property, it is as a result as follows：
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is every according to
According to the present invention technical spirit above example is made any simple modification, equivalent variations, each fall within the present invention protection
Within the scope of.
Claims (9)
1. a kind of non-dispersible underwater concrete, it is characterised in that：Include the raw material of following parts by weights meter：Middle sand 350~400
Part, 650~750 parts of rubble, 150~300 parts of cement, 20~50 parts of mineral additive, 5~15 parts of flocculant, water-reducing agent 5~10
Part, 3~6 parts of swelling agent, 2~5 parts of adjustable solidification agent, 100~250 parts of water；Flocculant is by modified methyl cellulose flocculant and poly- silicon
Sour ferric sulfate flocculant composition, mass ratio are (5~3)：1.
2. non-dispersible underwater concrete as described in claim 1, it is characterised in that：The modified methyl cellulose flocculant and
The mass ratio of polysilicate sulfuric acid ferric flocculant is 4:1.
3. non-dispersible underwater concrete as described in claim 1, it is characterised in that：The clay content of the middle sand is less than 1%；Carefully
It is 2.4~3.0 to spend modulus, particle size distribution range：4.75mm, which tails over 5~7%, 2.5mm and tails over 12~15%, 1.18mm, tails over 22
~25%, 0.6mm, which tail over 50~54%, 0.315mm and tail over 80~82%, 0.16mm, tails over 94~96%.
4. non-dispersible underwater concrete as claimed in claim 3, it is characterised in that：The gill shape ＜ 8% of the rubble, containing mud
Measure ＜ 0.5%；Particle size distribution range：25mm, which tails over 1~2%, 20mm and tails over 28~30%, 16mm, tails over 60~65%, 10mm
It tails over 95~98%, 5mm and tails over 100%.
5. non-dispersible underwater concrete as described in claim 1, it is characterised in that：The cement is Portland cement.
6. non-dispersible underwater concrete as described in claim 1, it is characterised in that：The mineral additive is slag.
7. non-dispersible underwater concrete as described in claim 1, it is characterised in that：The water-reducing agent is polycarboxylate water-reducer.
8. non-dispersible underwater concrete as described in claim 1, it is characterised in that：The swelling agent is UEA swelling agents.
9. non-dispersible underwater concrete as described in claim 1, it is characterised in that：The adjustable solidification agent is gypsum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810046011.1A CN108178578B (en) | 2018-01-17 | 2018-01-17 | Underwater undispersed concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810046011.1A CN108178578B (en) | 2018-01-17 | 2018-01-17 | Underwater undispersed concrete |
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| CN108178578A true CN108178578A (en) | 2018-06-19 |
| CN108178578B CN108178578B (en) | 2020-10-02 |
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| CN201810046011.1A Active CN108178578B (en) | 2018-01-17 | 2018-01-17 | Underwater undispersed concrete |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108439902A (en) * | 2018-04-23 | 2018-08-24 | 安徽省康宇水电机械成套设备有限公司 | A kind of underwater concrete formula |
| CN111517727A (en) * | 2020-05-20 | 2020-08-11 | 深圳市东大洋建材有限公司 | Concrete for underwater engineering and preparation method thereof |
| CN114988756A (en) * | 2022-05-18 | 2022-09-02 | 江苏申御特种建材有限公司 | Underwater anti-dispersion expanding agent and preparation method thereof |
| CN115557757A (en) * | 2022-11-14 | 2023-01-03 | 安徽省交通控股集团有限公司 | Anti-scouring adjustable-setting dado concrete suitable for underwater construction |
| CN117228983A (en) * | 2023-09-27 | 2023-12-15 | 石家庄市长安育才建材有限公司 | Additive for inhibiting flocculant in machine-made sand and preparation method thereof |
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| CN107500597A (en) * | 2017-09-26 | 2017-12-22 | 江苏百瑞吉新材料有限公司 | A kind of non-dispersible underwater concrete additive and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108439902A (en) * | 2018-04-23 | 2018-08-24 | 安徽省康宇水电机械成套设备有限公司 | A kind of underwater concrete formula |
| CN111517727A (en) * | 2020-05-20 | 2020-08-11 | 深圳市东大洋建材有限公司 | Concrete for underwater engineering and preparation method thereof |
| CN114988756A (en) * | 2022-05-18 | 2022-09-02 | 江苏申御特种建材有限公司 | Underwater anti-dispersion expanding agent and preparation method thereof |
| CN114988756B (en) * | 2022-05-18 | 2023-02-03 | 江苏申御特种建材有限公司 | Underwater anti-dispersion expanding agent and preparation method thereof |
| CN115557757A (en) * | 2022-11-14 | 2023-01-03 | 安徽省交通控股集团有限公司 | Anti-scouring adjustable-setting dado concrete suitable for underwater construction |
| CN117228983A (en) * | 2023-09-27 | 2023-12-15 | 石家庄市长安育才建材有限公司 | Additive for inhibiting flocculant in machine-made sand and preparation method thereof |
| CN117228983B (en) * | 2023-09-27 | 2024-03-01 | 石家庄市长安育才建材有限公司 | Additive for inhibiting flocculant in machine-made sand and preparation method thereof |
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|---|---|
| CN108178578B (en) | 2020-10-02 |
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