CN115385626A - Cast-in-place concrete for cast-in-place pile construction - Google Patents
Cast-in-place concrete for cast-in-place pile construction Download PDFInfo
- Publication number
- CN115385626A CN115385626A CN202210996498.6A CN202210996498A CN115385626A CN 115385626 A CN115385626 A CN 115385626A CN 202210996498 A CN202210996498 A CN 202210996498A CN 115385626 A CN115385626 A CN 115385626A
- Authority
- CN
- China
- Prior art keywords
- parts
- cast
- concrete
- place
- sand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 48
- 238000010276 construction Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000004576 sand Substances 0.000 claims abstract description 15
- 239000004568 cement Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 8
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 6
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims abstract description 6
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000008394 flocculating agent Substances 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 6
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical group [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 6
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- 239000010881 fly ash Substances 0.000 claims description 4
- 229910021487 silica fume Inorganic materials 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 230000010412 perfusion Effects 0.000 claims 1
- 238000005429 filling process Methods 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 5
- 239000004570 mortar (masonry) Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- 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
The invention discloses cast-in-place concrete for cast-in-place pile construction, which belongs to the technical field of concrete and is prepared from the following raw materials in parts by weight: 1000 parts of cement, 1400-1500 parts of sand, 1900-2050 parts of coarse aggregate, 580-650 parts of water, 350-420 parts of gelled material, 18-23 parts of water reducing agent, 22-27 parts of flocculating agent and 23-30 parts of sodium carboxymethylcellulose. The concrete is used for filling the pile, is not dispersed or isolated in the underwater filling process, can be quickly formed after filling, shortens the filling construction time, and ensures the strength and the quality of the pile foundation.
Description
Technical Field
The invention belongs to the technical field of concrete, and particularly relates to cast-in-place concrete for cast-in-place pile construction.
Background
At present, the construction of the cast-in-place concrete pile in China generally adopts a conduit method, and the principle is that under the action of certain drop pressure, concrete mixture enters the lower part of the initially cast-in-place concrete through a steel pipe inlet in sealed connection, and props the initially cast-in-place concrete and slurry or water on the initially cast-in-place concrete to rise to form a compact concrete pile body. Therefore, the concrete needs to have enough plasticity and cohesiveness, is easy to flow in the guide pipe without segregation, and under the condition of being washed by water flow or being contacted with water, the cement paste is not dispersed and lost, so that the adverse effects of corrosive media of the cast-in-place pile in the concrete casting process on the concrete quality and the long-term durability of the cast-in-place pile are avoided to the greatest extent. Thereby ensuring the structural strength of the concrete. Therefore, the concrete configuration technology directly influences the construction quality of the cast-in-place pile.
The existing concrete preparation technology still has great defects and is necessary to be improved.
Disclosure of Invention
The invention aims to provide the cast-in-place concrete which is not dispersed or separated in the casting process, can be quickly formed after casting, shortens the casting construction time and ensures the strength and the quality of a pile foundation.
In order to solve the technical problems, the invention adopts the following technical scheme:
the cast-in-place concrete for cast-in-place pile construction is prepared from the following raw materials in parts by weight: 1000 parts of cement, 1400-1500 parts of sand, 1900-2050 parts of coarse aggregate, 580-650 parts of water, 350-420 parts of gelled material, 18-23 parts of water reducing agent, 22-27 parts of flocculating agent and 23-30 parts of sodium carboxymethylcellulose.
The invention also has the following additional technical features:
preferably, the coarse aggregate is crushed stone, and the particle size is 5-35mm continuous gradation.
Preferably, the cementing material is silica fume, fly ash and blast furnace slag, and the mass ratio is 1.5-2;
preferably, the water reducing agent is a polycarboxylic acid water reducing agent.
Preferably, the sand is fine sand and medium sand, and the mass ratio of the fine sand to the medium sand is 1:1-2.
Preferably, the flocculant is sodium polyacrylate and polyacrylamide with the weight ratio of 1:1, and the polyacrylamide is anionic.
Has the beneficial effects that:
(1) The application adopts the sodium carboxymethyl cellulose, so that the concrete has better fluidity, the cement can automatically level and self-compact in the pouring process, and the construction process is smooth;
(2) The silica fume adopted by the application can react with a cement hydration product Ca (OH) 2 to generate C-S-H gel, and the C-S-H gel is filled in concrete, so that the compactness and the early strength of the concrete are improved; the mineral powder can also generate a volcanic ash effect, so that the erosion resistance of the cement concrete to seawater and fresh water can be effectively improved, and the erosion resistance of sulfate can be resisted; the fly ash is used for improving the workability, the pumpability and the later strength of concrete;
(3) The sodium polyacrylate and the polyacrylamide are used as flocculating agents, and the sodium polyacrylate can react with divalent and above metal ions in the concrete to generate crosslinking to form gel, so that the concrete is promoted to be rapidly coagulated and self-compacted, and the later strength is improved;
(4) The cast-in-place pile concrete disclosed by the invention is not dispersed and isolated in water casting, the cement is not lost, the cast concrete is uniform, and the mechanical strength and durability after setting and hardening are excellent.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below, which are for the purpose of providing a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
1. The raw material types and purchasers are shown in Table 1
TABLE 1 raw material type and purchaser
2. Weighing the raw materials in parts by weight, wherein the raw materials are prepared as shown in Table 2:
table 2 raw material preparation table
3. After the raw materials are prepared, the pouring concrete is prepared according to the following method:
(1) Pouring cement, fine sand, medium sand, broken stone, a polycarboxylic acid water reducing agent and half water into a stirrer to be stirred to obtain mixed aggregate;
(2) Dissolving sodium polyacrylate, sodium carboxymethylcellulose and polyacrylamide in water, pouring into the mixed aggregate, adding the rest water, and uniformly stirring to obtain aggregate mortar;
(3) Finally, adding the silica fume, the fly ash and the blast furnace slag into the aggregate mortar and uniformly stirring to obtain concrete mortar;
(4) And pouring the concrete mortar into the mold under water, curing and demolding after underwater forming to obtain the cast concrete.
4. The concrete test block is detected, and the quality is as shown in table 3:
the detection method comprises the following steps:
the 7d compressive strength (MPa) and the 28d compressive strength (MPa) of the concrete test block are detected according to GB/T50081-2002 Standard methods for testing the mechanical properties of common concrete.
And (3) detecting the cement loss rate and slump of the concrete test block according to DL/T5117-2000' test procedure for non-dispersible concrete underwater.
TABLE 3 quality test results of underwater undispersed concrete
As can be seen by comparing example 1 and comparative examples 1-2 in Table 3, sodium polyacrylate and sodium carboxymethylcellulose both affect the self-compaction and tackiness of the concrete mortar, the slump and cement loss rate of the concrete is increased, the compressive strength is reduced, and the setting time is increased.
While there have been shown and described the fundamental principles and principal features of the invention and advantages thereof, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are given by way of illustration of the principles of the invention, but is susceptible to various changes and modifications without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The cast-in-place concrete for cast-in-place pile construction is characterized by being prepared from the following raw materials in parts by weight: 1000 parts of cement, 1400-1500 parts of sand, 1900-2050 parts of coarse aggregate, 580-650 parts of water, 350-420 parts of gelled material, 18-23 parts of water reducing agent, 22-27 parts of flocculating agent and 23-30 parts of sodium carboxymethylcellulose.
2. The cast-in-place concrete according to claim 1, wherein the coarse aggregate is crushed stone having a continuous gradation of 5 to 35mm in particle size.
3. The pouring concrete according to claim 1, wherein the cementitious material is silica fume, fly ash and blast furnace slag, and the mass ratio is 1: 1.5-2.
4. The cast-in-place concrete of claim 1, wherein the water reducing agent is a polycarboxylic acid water reducing agent.
5. The cast-in-place concrete according to claim 1, wherein the sand is fine sand and medium sand, and the mass ratio of the fine sand to the medium sand is 1:1-2.
6. The perfusion concrete of claim 1, wherein the flocculant is sodium polyacrylate and polyacrylamide in a weight ratio of 1:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210996498.6A CN115385626B (en) | 2022-08-19 | 2022-08-19 | Cast-in-place concrete for cast-in-place pile construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210996498.6A CN115385626B (en) | 2022-08-19 | 2022-08-19 | Cast-in-place concrete for cast-in-place pile construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115385626A true CN115385626A (en) | 2022-11-25 |
| CN115385626B CN115385626B (en) | 2023-10-27 |
Family
ID=84121359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210996498.6A Active CN115385626B (en) | 2022-08-19 | 2022-08-19 | Cast-in-place concrete for cast-in-place pile construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115385626B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986000291A1 (en) * | 1984-06-20 | 1986-01-16 | Sandoz Ag | Improvements in or relating to organic compounds for cement mixes |
-
2022
- 2022-08-19 CN CN202210996498.6A patent/CN115385626B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986000291A1 (en) * | 1984-06-20 | 1986-01-16 | Sandoz Ag | Improvements in or relating to organic compounds for cement mixes |
Non-Patent Citations (1)
| Title |
|---|
| 李虎军等: "水溶性聚合物改性水泥的研究 Ⅱ．水溶性聚合物对水泥水化过程的影响" * |
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| Publication number | Publication date |
|---|---|
| CN115385626B (en) | 2023-10-27 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |