CN112811875A - Quick-setting and quick-hardening white UHPC and preparation method thereof - Google Patents
Quick-setting and quick-hardening white UHPC and preparation method thereof Download PDFInfo
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- CN112811875A CN112811875A CN202110058254.9A CN202110058254A CN112811875A CN 112811875 A CN112811875 A CN 112811875A CN 202110058254 A CN202110058254 A CN 202110058254A CN 112811875 A CN112811875 A CN 112811875A
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- white
- uhpc
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- cement
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000004568 cement Substances 0.000 claims abstract description 37
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052918 calcium silicate Inorganic materials 0.000 claims abstract description 22
- 239000006004 Quartz sand Substances 0.000 claims abstract description 21
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 235000012241 calcium silicate Nutrition 0.000 claims abstract description 19
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 16
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 15
- 239000010453 quartz Substances 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 14
- 239000011398 Portland cement Substances 0.000 claims abstract description 13
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 13
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 3
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical group C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 9
- 239000000176 sodium gluconate Substances 0.000 claims description 9
- 229940005574 sodium gluconate Drugs 0.000 claims description 9
- 235000012207 sodium gluconate Nutrition 0.000 claims description 9
- 229920005646 polycarboxylate Polymers 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 239000013530 defoamer Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 2
- 239000002480 mineral oil Substances 0.000 claims description 2
- 235000010446 mineral oil Nutrition 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 238000007712 rapid solidification Methods 0.000 claims 2
- 239000004567 concrete Substances 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 6
- 239000000654 additive Substances 0.000 abstract description 2
- 230000000996 additive effect Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 8
- 239000002994 raw material Substances 0.000 description 7
- 238000005336 cracking Methods 0.000 description 5
- 239000004566 building material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010998 test method Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000011863 silicon-based powder Substances 0.000 description 2
- 239000008030 superplasticizer Substances 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 241001147416 Ursus maritimus Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000012856 weighed raw material Substances 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
- C04B28/06—Aluminous 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
- 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
Abstract
The invention provides a quick-setting and quick-hardening white UHPC and a preparation method thereof, wherein the white UHPC is composed of white portland cement (white cement), high belite sulphoaluminate cement, silica fume, quartz sand, quartz powder, aluminum sulfate, a water reducing agent, a defoaming agent and a retarder. The white UHPC is prepared by taking white cement as a main component, adding high belite sulphoaluminate cement and white silica fume to optimize a cementing material and adjusting proper quartz aggregate and additive mixing amount. The white UHPC not only has the characteristics of high strength and good durability, but also has the characteristics of small shrinkage, quick forming and the like, and can meet the requirements of modern high-strength decorative concrete.
Description
Technical Field
The invention relates to the field of building materials, in particular to a quick-setting and quick-hardening white UHPC and a preparation method thereof.
Background
With the improvement of requirements of people on decoration of buildings and beautification of the environment, a plurality of architects innovatively apply concrete as a structural decoration integrated material, so that the concrete can play a role in bearing load and can also play an aesthetic role and a space expression role. The white UHPC not only has the characteristics of high strength and high durability of the UHPC, but also has excellent decorative characteristics, and meets the requirements of modern building materials. At present, white UHPC is often applied to the aspects of high-rise buildings, high-speed railways, bridge engineering and the like in a prefabricated part mode, and because the white UHPC mainly takes white portland cement as a main cementing material and simultaneously uses a large amount of water reducing agent, the traditional white UHPC has longer setting time and causes lower efficiency in practical application; the preparation of UHPC uses a large amount of gelled material, the water-gel ratio is extremely low, so that the UHPC has large early shrinkage, wherein the shrinkage of the UHPC is mainly shown as self-shrinkage, the early shrinkage is developed quickly, and if the UHPC cannot be processed properly, the concrete can crack or warp. To solve the above problems, many studies have been made by those skilled in the art, such as adding high-performance admixtures, adding swelling agents, adding various fibers to compensate for shrinkage, or adding setting accelerators to accelerate setting. Some of the methods have achieved certain effects in the research of common UHPC, however, the performance research of white UHPC not only considers accelerating coagulation and reducing shrinkage, but also cannot influence the whiteness of the white UHPC.
The high belite sulphoaluminate cement has the advantages of quick setting, quick hardening, micro expansion, low drying shrinkage, high strength and the like, and also has higher whiteness. The high belite sulphoaluminate cement is used as one of the cementing materials to prepare the white UHPC, so that the setting and hardening of the white UHPC can be accelerated, the strength is improved, part of shrinkage can be counteracted by the characteristic of micro-expansion of the high belite sulphoaluminate cement, and meanwhile, the whiteness of the white UHPC is not influenced. Therefore, the invention discloses a white UHPC with quick forming, high strength and low shrinkage by doping the high belite sulphoaluminate cement, and has great significance for the practical application of the white UHPC.
Disclosure of Invention
The invention aims to provide a white UHPC with quick forming, good durability, high strength and small shrinkage, which meets the requirements of modern high-strength decorative concrete.
In order to achieve the aim, the technical scheme of the invention provides a quick-setting and quick-hardening white UHPC, which comprises the following components in parts by weight: 55-85 parts of white cement, 10-30 parts of high belite sulphoaluminate cement, 5-15 parts of silica fume, 90-120 parts of quartz sand, 0-30 parts of quartz powder, 1-2 parts of aluminum sulfate, 1.0-1.5 parts of water reducing agent, 0.1-0.5 part of defoaming agent, 0.1-0.5 part of retarder and 18-22 parts of water; wherein the sum of the white cement, the high belite sulphoaluminate cement and the siliceous dust is 100 parts.
The white cement is white portland cement and has a strength grade of 52.5.
The high belite sulphoaluminate cement is white anti-cracking double-quick sulphoaluminate cement, and the strength grade is 42.5.
The quartz sand consists of 40-70 meshes of quartz sand and 80-120 meshes of quartz sand, and the weight ratio is 3: 1.
The quartz powder is 300-350 meshes of quartz powder.
The silica fume is white silica fume.
The water reducing agent is a polycarboxylic acid water reducing agent.
The defoaming agent is a mineral oil high-efficiency defoaming agent.
The retarder is sodium gluconate.
The preparation method comprises the following steps:
step one, weighing the white cement, the high belite sulphoaluminate cement, the silica fume, the quartz sand, the quartz powder, the aluminum sulfate and the additive, then putting the mixture into a stirrer for mixing, and pre-stirring for 2 min;
step two, adding 80% of weighed water, and stirring for 5-8 min;
and step three, adding the rest water, and continuously stirring for 2-5min to obtain slurry.
And step four, pouring the slurry into a mold, vibrating, forming and maintaining for more than 28 days, and demolding.
The quick-setting and quick-hardening white UHPC is prepared by taking white cement, high belite sulphoaluminate cement and white silica fume as inorganic cementing materials, taking quartz sand and quartz powder as fine aggregates, and adding aluminum sulfate, a water reducing agent, a defoaming agent and a retarder. The high belite sulphoaluminate cement has the advantages of quick setting, quick hardening, early strength, high strength, micro expansion, low drying shrinkage and the like, has certain whiteness, and can effectively make up the defects of long setting time, large shrinkage and the like of the white cement by utilizing the high belite sulphoaluminate cement to modify the white portland cement and mutually coordinating and promoting hydration. Therefore, the invention mainly utilizes the characteristic to obtain the white UHPC with quick forming, high strength and small shrinkage deformation.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
All of the starting materials of the present invention are commercially available.
White Portland Cement, grade 52.5, white silver fir cement GmbH, Jiangxi.
White anti-crack fast-double belite sulphoaluminate cement, grade 42.5, from tang mountain polar bear building materials ltd.
White silica fume, guangzhou ernda chemical ltd.
Quartz sand, qinhuang island general resistant quartz sand ltd.
Quartz powder, qinhuang island general resistant quartz sand ltd.
Aluminum sulfate, Tianjin Fuchen chemical reagents, Inc.
8030 type polycarboxylate superplasticizer, Jiangsu McJordan building materials science and technology Limited.
P8850 type defoamer, Mingling chemical group, Germany.
Sodium gluconate retarder, stannous City Adita United chemical Co.
Example 1:
the quick-setting and quick-hardening white UHPC consists of the following raw materials in parts by weight: 70 parts of white Portland cement, 20 parts of white anti-cracking double-fast high belite sulphoaluminate cement, 10 parts of white silica fume, 82.5 parts of 40-70 meshes, 27.5 parts of 80-120 meshes of quartz sand, 1 part of aluminum sulfate, 1.2 parts of 8030 type polycarboxylate water reducing agent, 0.3 part of P8850 type defoaming agent, 0.1 part of sodium gluconate and 20 parts of water.
Example 2:
the quick-setting and quick-hardening white UHPC consists of the following raw materials in parts by weight: 70 parts of white Portland cement, 20 parts of white anti-cracking double-speed high-belite sulphoaluminate cement, 10 parts of white silica fume, 75 parts of 40-70 meshes, 25 parts of 80-120 meshes of quartz sand, 10 parts of 300-350 meshes of quartz powder, 1 part of aluminum sulfate, 1.2 parts of 8030 type polycarboxylate water reducing agent, 0.3 part of P8850 type defoaming agent, 0.1 part of sodium gluconate and 20 parts of water.
Example 3:
the quick-setting and quick-hardening white UHPC consists of the following raw materials in parts by weight: 70 parts of white Portland cement, 20 parts of white anti-cracking double-speed high-belite sulphoaluminate cement, 10 parts of white silica fume, 75 parts of 40-70 meshes, 25 parts of 80-120 meshes of quartz sand, 10 parts of 300-350 meshes of quartz powder, 1 part of aluminum sulfate, 1.2 parts of 8030 type polycarboxylate water reducing agent, 0.3 part of P8850 type defoaming agent, 0.1 part of sodium gluconate and 18 parts of water.
Example 4:
the quick-setting and quick-hardening white UHPC consists of the following raw materials in parts by weight: 70 parts of white Portland cement, 20 parts of white anti-cracking double-speed high-belite sulphoaluminate cement, 10 parts of white silica fume, 90 parts of 40-70 meshes, 30 parts of 80-120 meshes of quartz sand, 1 part of aluminum sulfate, 1.2 parts of 8030 type polycarboxylate superplasticizer, 0.3 part of P8850 type defoaming agent, 0.1 part of sodium gluconate and 20 parts of water.
Comparative example 1:
this comparative example provides a white UHPC, substantially the same as the examples except that it consists of the following raw materials in parts by weight: 85 parts of white Portland cement, 10 parts of white silicon powder, 82.5 parts of 40-70 meshes, 27.5 parts of 80-120 meshes of quartz sand, 1 part of aluminum sulfate, 1.2 parts of 8030 type polycarboxylate water reducing agent, 0.3 part of P8850 type defoaming agent, 0.1 part of sodium gluconate and 20 parts of water.
Comparative example 2:
this comparative example provides a white UHPC, substantially the same as the examples except that it consists of the following raw materials in parts by weight: 85 parts of white portland cement, 10 parts of white silicon powder, 75 parts of 40-70 meshes, 25 parts of 80-120 meshes of quartz sand, 10 parts of 300-350 meshes of quartz powder, 1 part of aluminum sulfate, 1.2 parts of 8030 type polycarboxylate water reducing agent, 0.3 part of P8850 type defoaming agent, 0.1 part of sodium gluconate and 20 parts of water.
The preparation method comprises the following steps: according to the raw material proportion, the weighed raw materials are put into a stirrer to be premixed for 2min to prepare dry components. Then, 80% water was added to the mixer, and the mixture was stirred for 5min, and the remaining water was added and the stirring was continued for 3min to obtain a slurry. Pouring the slurry into a test mold, vibrating, troweling and then putting into a curing room for curing.
And (3) performance testing:
the condensation time test method comprises the following steps: GB/T50080-2016 common concrete mixture performance test method standard.
And (3) whiteness testing: GB/T2015-2005 white portland cement.
Testing the fluidity: GB/T2419-2016 cement mortar fluidity determination method (without opening a jump table).
And (3) testing the strength: GB/T17671-1999 Cement mortar Strength test method (ISO method).
Self-shrinkage testing: GB/T50082-2009 standard for testing long-term performance and durability of common concrete (non-contact method concrete shrinkage test method).
The test results are shown in the table.
Claims (10)
1. A white UHPC of quick setting and hardening, characterized by, comprising the following components by weight: 55-85 parts of white cement, 10-30 parts of high belite sulphoaluminate cement, 5-15 parts of silica fume, 90-120 parts of quartz sand, 0-30 parts of quartz powder, 1-2 parts of aluminum sulfate, 1.0-1.5 parts of water reducing agent, 0.1-0.5 part of defoaming agent, 0.1-0.5 part of retarder and 18-22 parts of water; wherein the sum of the white cement, the high belite sulphoaluminate cement and the siliceous dust is 100 parts.
2. The UHPC of claim 1, wherein the white cement is white portland cement having a strength rating of 52.5.
3. The white UHPC with the characteristics of rapid solidification and rapid hardening according to claim 1, wherein the high belite sulphoaluminate cement is white anti-crack double rapid sulphoaluminate cement with the strength grade of 42.5.
4. The UHPC of claim 1, wherein the silica fume is white silica fume.
5. The UHPC with the characteristics of rapid solidification and rapid hardening according to claim 1, wherein the quartz sand consists of 40-70 meshes of quartz sand and 80-120 meshes of quartz sand, and the weight ratio is 3: 1.
6. The UHPC with the characteristics of quick setting and hardening as claimed in claim 1, wherein the quartz powder is 300-350 mesh quartz powder.
7. The white UHPC with the characteristics of claim 1, wherein the water reducer is a polycarboxylate water reducer.
8. The white UHPC with quick setting and hardening functions as claimed in claim 1, wherein the defoamer is mineral oil high efficiency defoamer.
9. The white UHPC of claim 1, wherein the retarder is sodium gluconate.
10. Process for the preparation of a fast-setting, fast-hardening white UHPC according to any of claims 1 to 9, characterized in that:
step one, weighing the white cement, the high belite sulphoaluminate cement, the silica fume, the quartz sand, the aluminum sulfate, the quartz powder, the water reducing agent, the defoaming agent and the retarder, then putting the mixture into a stirrer for mixing, and pre-stirring for 2 min;
step two, adding 80% of weighed water, and stirring for 5-8 min;
adding the rest water, and continuously stirring for 2-5min to obtain slurry;
and step four, pouring the slurry into a mold, vibrating, forming and maintaining for more than 28 days, and demolding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110058254.9A CN112811875A (en) | 2021-01-16 | 2021-01-16 | Quick-setting and quick-hardening white UHPC and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110058254.9A CN112811875A (en) | 2021-01-16 | 2021-01-16 | Quick-setting and quick-hardening white UHPC and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112811875A true CN112811875A (en) | 2021-05-18 |
Family
ID=75869573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110058254.9A Pending CN112811875A (en) | 2021-01-16 | 2021-01-16 | Quick-setting and quick-hardening white UHPC and preparation method thereof |
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| Country | Link |
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| CN (1) | CN112811875A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195466A (en) * | 2022-01-07 | 2022-03-18 | 中交三航局第三工程有限公司 | Early-strength high-strength sleeve grouting material and preparation method thereof |
| CN116462467A (en) * | 2023-04-11 | 2023-07-21 | 浙江大东吴建筑科技有限公司 | Ultra-high performance concrete for decoration and preparation method thereof |
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|---|---|---|---|---|
| JP2017100888A (en) * | 2015-11-30 | 2017-06-08 | 太平洋セメント株式会社 | Decorative flat plate and manufacturing method therefor |
| CN109867460A (en) * | 2019-03-06 | 2019-06-11 | 唐山北极熊建材有限公司 | Modified white cement and its method of modifying of application, white cement |
| CN111285629A (en) * | 2020-03-24 | 2020-06-16 | 天津水泥工业设计研究院有限公司 | Low-shrinkage ultrahigh-performance concrete and preparation method thereof |
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2021
- 2021-01-16 CN CN202110058254.9A patent/CN112811875A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017100888A (en) * | 2015-11-30 | 2017-06-08 | 太平洋セメント株式会社 | Decorative flat plate and manufacturing method therefor |
| CN109867460A (en) * | 2019-03-06 | 2019-06-11 | 唐山北极熊建材有限公司 | Modified white cement and its method of modifying of application, white cement |
| CN111285629A (en) * | 2020-03-24 | 2020-06-16 | 天津水泥工业设计研究院有限公司 | Low-shrinkage ultrahigh-performance concrete and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195466A (en) * | 2022-01-07 | 2022-03-18 | 中交三航局第三工程有限公司 | Early-strength high-strength sleeve grouting material and preparation method thereof |
| CN116462467A (en) * | 2023-04-11 | 2023-07-21 | 浙江大东吴建筑科技有限公司 | Ultra-high performance concrete for decoration and preparation method thereof |
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Application publication date: 20210518 |
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