CN115557744A - Method for optimizing ultrahigh-performance concrete by multi-factor parameter method - Google Patents
Method for optimizing ultrahigh-performance concrete by multi-factor parameter method Download PDFInfo
- Publication number
- CN115557744A CN115557744A CN202210911371.XA CN202210911371A CN115557744A CN 115557744 A CN115557744 A CN 115557744A CN 202210911371 A CN202210911371 A CN 202210911371A CN 115557744 A CN115557744 A CN 115557744A
- Authority
- CN
- China
- Prior art keywords
- performance concrete
- water
- ultra
- high performance
- cement
- 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.)
- Pending
Links
- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000002245 particle Substances 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000009826 distribution Methods 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 30
- 239000000843 powder Substances 0.000 claims description 20
- 239000004568 cement Substances 0.000 claims description 16
- 235000019738 Limestone Nutrition 0.000 claims description 12
- 239000006028 limestone Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 239000004576 sand Substances 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 239000011343 solid material Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 101100001669 Emericella variicolor andD gene Proteins 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 235000011837 pasties Nutrition 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims 2
- 239000011268 mixed slurry Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Images
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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00198—Characterisation or quantities of the compositions or their ingredients expressed as mathematical formulae or equations
-
- 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
Abstract
The invention discloses a method for optimizing ultra-high performance concrete by a multi-factor parameter method, aiming at overcoming the adverse effect of uncertainty of a material mixing ratio on the production process and quality of the ultra-high performance concrete so as to achieve the optimal performance of a product. In the process of preparing the ultra-high performance concrete, the strength and the impermeability of the ultra-high performance concrete can be effectively improved by the measures of optimizing the particle size distribution, determining the optimal water content and the optimal steel fiber content, controlling the viscosity of the mixed slurry within a reasonable range and the like.
Description
Technical Field
The invention relates to a method for optimizing ultra-high performance concrete by a multi-factor parameter method, which can effectively improve the strength and impermeability of the ultra-high performance concrete by measures such as optimizing particle size distribution, determining the optimal water content and the optimal steel fiber content, controlling the viscosity of mixed slurry within a reasonable range and the like in the process of preparing the ultra-high performance concrete.
Background
The ultra-high performance concrete is a cement-based composite material, and has wide application prospects in the fields of large-span bridge engineering, super high-rise buildings, national defense engineering, ocean engineering, civil engineering reinforcement and the like due to the remarkable mechanical properties and excellent durability of the ultra-high performance concrete. However, the currently produced ultra-high performance concrete lacks guidance of relevant specifications, and the randomness of the mixing ratio of the materials is strong, so that the ultra-high performance concrete is difficult to achieve the optimal performance.
At present, many theoretical models are proposed at home and abroad to optimize the grain composition, but the theories are based on drying conditions, and the ultrahigh-performance concrete is mixed under a fluid state or a semi-fluid state, so that the mixed slurry actually mixed is greatly different from a theoretical design model. The optimal water content is one of key factors influencing the density, compactness and mechanical property of the ultra-high performance concrete, and the determination of the value of the optimal water content in the cement paste mixture becomes an important technical index. In addition, the viscosity of the mixed slurry and the content of steel fibers greatly influence the strength and impermeability of the ultra-high performance concrete.
Therefore, if a cement paste mixture is mixed by a reasonable non-dry state mixing design method, and multiple factors such as optimal water content, optimal fiber content, reasonable viscosity and the like are considered, effective technical guarantee is provided for popularization and application of the ultra-high performance concrete, and the technical blank of domestic production technology is filled.
Disclosure of Invention
The invention aims to overcome the adverse effect of uncertainty of the mixing ratio of materials on the production process and quality of the ultra-high performance concrete so as to achieve the optimal performance of the product.
The invention provides a method for designing ultra-high performance concrete, which uses the following materials: ordinary portland cement, silica powder, limestone powder, sand, a water reducing agent, water and steel fibers.
The material framework of the ultra-high performance concrete is optimized by using a model shown in the following formula, and the mixing proportion of cement, silica powder, limestone powder and sand is further calculated.
In the formula (I), the compound is shown in the specification,Dthe diameter of the particles is the diameter of the particles,P(D) Is less thanDThe fraction of particles of (a) is,D min andD max respectively the minimum and maximum diameter of the particles,qis the distribution modulus.
Description figure 1 shows the aggregate, mixture, target curve particle size distribution of ultra high performance concrete.
For the ultra-high performance concrete composite material, the density of the ultra-high performance concrete composite material tends to increase and then decrease with the increase of the water content, and the water content corresponding to the maximum density is called the optimal water content. The maximum water content and the maximum density are important factors influencing the strength, impermeability and other performances of the ultra-high performance concrete. The optimum moisture content was determined using the following procedure.
1) Presetting a water-cement ratio, then determining the quality of the required water, cement, silica powder, limestone powder, sand and water reducing agent, and putting the water, cement, silica powder, limestone powder, sand and water reducing agent into different containers for later use;
2) Adding cement, silica powder and limestone powder into a stirrer to pre-stir at a low speed for 60 seconds, and then adding sand into the stirrer to stir at a low speed for 60 seconds;
3) Uniformly and slowly pouring water and a water reducing agent into the mixture, stirring the mixture to be pasty, and then stirring the mixture at a low speed for 180 seconds;
4) Pouring the paste into a 220 ml cylindrical container, vibrating for 30 times to compact the paste, and then weighing the paste;
5) And (4) gradually reducing the water-cement ratio, and repeating the steps (1) to (4) until the maximum quality is reached. The maximum density is calculated by the following formula.
In the formula (I), the compound is shown in the specification,Mthe quality of the ultra-high performance concrete is improved,Vis the volume of the container, p w 、ρ a 、ρ c 、ρ s And ρ l Respectively the densities of water, sand, cement, silica powder and limestone powder,R w 、R a 、R c 、R s andR l respectively the water-solid material volume ratio, the sand-solid material volume ratio, the cement-solid material volume ratio, the silicon powder-solid volume ratio and the limestone powder-solid material volume ratio.
Unwanted air bubbles (greater than 20 microns in diameter) in ultra-high performance concrete can reduce its strength and durability. The viscosity does not exceed the maximum viscosity value determined by the following formula, and most harmful bubbles are automatically discharged.
In the formula etamaxIs the maximum value of the viscosity, and the viscosity,gis the acceleration of the gravity, and the acceleration is the acceleration of the gravity,ris the radius of the gas bubble and,min order to obtain a viscosity index,nis the rheological index, rho is the density of the ultra-high performance concrete, rhopIs the air density.
The content of steel fibers has an important influence on the density and porosity of the ultra-high performance concrete. Generally, as the steel fiber content increases, the density decreases, increases, and decreases again. The optimal steel fiber content (volume content of 2-2.5%) can greatly reduce the negative effect and maximize the density of the ultra-high performance concrete.
Practice proves that the mechanical property and impermeability of the ultra-high performance concrete are greatly improved by optimizing particle grading, determining the optimal water content and the optimal steel fiber content, controlling the viscosity of the mixed slurry and other means, and the adverse effect of the unstable content of the mixed material on the product can be effectively improved.
Claims (6)
1. A method for optimizing the ultrahigh-performance concrete by multi-factor parameter method features that in its preparing process, the grain composition is optimized, optimal water content and optimal fibre consumption are used, and reasonable viscosity is chosen.
2. The method of claim 1, wherein the material framework is optimized and the material ratio is calculated using the following formula:
in the formula (I), the compound is shown in the specification,Dthe diameter of the particles is the diameter of the particles,P(D) Is less thanDThe fraction of particles of (a) is,D min andD max respectively the minimum and maximum diameter of the particles,qis the distribution modulus.
3. The method of claim 1 for optimizing ultra-high performance concrete using multi-factor parameters, wherein the optimal moisture content is determined by the steps of:
1) Presetting a water-cement ratio, then determining the quality of the required water, cement, silica powder, limestone powder, sand and water reducing agent, and putting the water, cement, silica powder, limestone powder, sand and water reducing agent into different containers for later use;
2) Adding cement, silica powder and limestone powder into a stirrer to pre-stir at a low speed for 60 seconds, and then adding sand into the stirrer to stir at a low speed for 60 seconds;
3) Uniformly and slowly pouring water and a water reducing agent into the mixture, stirring the mixture to be pasty, and then stirring the mixture at a low speed for 180 seconds;
4) Pouring the paste into a 220 ml cylindrical container, vibrating for 30 times to compact the paste, and then weighing the paste;
5) And (4) gradually reducing the water-cement ratio, and repeating the steps (1) to (4) until the maximum quality is reached.
4. The method of claim 1, wherein the maximum density of the ultra-high performance concrete slurry is calculated by the following formula:
in the formula (I), the compound is shown in the specification,Mthe quality of the ultra-high performance concrete is improved,Vis the volume of the container, p w 、ρ a 、ρ c 、ρ s And ρ l Respectively the densities of water, sand, cement, silica powder and limestone powder,R w 、R a 、R c 、R s andR l respectively the water-solid material volume ratio, the sand-solid material volume ratio, the cement-solid material volume ratio, the silicon powder-solid volume ratio and the limestone powder-solid material volume ratio.
5. The method of claim 1, wherein the maximum viscosity of the slurry is determined by the following formula:
in the formula (I), the compound is shown in the specification,ηmaxis the maximum value of the viscosity, and the viscosity,gin order to be the acceleration of the gravity,ris the radius of the gas bubble and,min order to obtain a viscosity index,nis the rheological index, rho is the density of the ultra-high performance concrete, rhopIs the air density.
6. The method of claim 1, wherein the optimal steel fiber volume content is 2% to 2.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210911371.XA CN115557744A (en) | 2022-07-30 | 2022-07-30 | Method for optimizing ultrahigh-performance concrete by multi-factor parameter method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210911371.XA CN115557744A (en) | 2022-07-30 | 2022-07-30 | Method for optimizing ultrahigh-performance concrete by multi-factor parameter method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115557744A true CN115557744A (en) | 2023-01-03 |
Family
ID=84738825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210911371.XA Pending CN115557744A (en) | 2022-07-30 | 2022-07-30 | Method for optimizing ultrahigh-performance concrete by multi-factor parameter method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115557744A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111554357A (en) * | 2020-04-29 | 2020-08-18 | 武汉市汉阳市政建设集团有限公司 | Ultra-high performance concrete and mix proportion design method thereof |
| CN112668176A (en) * | 2020-12-25 | 2021-04-16 | 中铁大桥局集团有限公司 | Design method of ultra-high performance fiber reinforced concrete containing coarse aggregate |
| CN114644489A (en) * | 2022-03-18 | 2022-06-21 | 华南理工大学 | Normal-temperature cured C200-grade high-fluidity ultrahigh-performance concrete and preparation method thereof |
-
2022
- 2022-07-30 CN CN202210911371.XA patent/CN115557744A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111554357A (en) * | 2020-04-29 | 2020-08-18 | 武汉市汉阳市政建设集团有限公司 | Ultra-high performance concrete and mix proportion design method thereof |
| CN112668176A (en) * | 2020-12-25 | 2021-04-16 | 中铁大桥局集团有限公司 | Design method of ultra-high performance fiber reinforced concrete containing coarse aggregate |
| CN114644489A (en) * | 2022-03-18 | 2022-06-21 | 华南理工大学 | Normal-temperature cured C200-grade high-fluidity ultrahigh-performance concrete and preparation method thereof |
Non-Patent Citations (8)
| Title |
|---|
| J.AGNELLO;L.FERNÁNDEZ LUCO;A.BENÍTEZ;崔玉忠;: "混凝土路面砖配合比设计的改进", 建筑砌块与砌块建筑 * |
| 余睿等: "基于颗粒最紧密堆积理论的超高性能混凝土配合比设计", 硅酸盐学报 * |
| 刘熙媛;李岩峰;朱铁军;王恩远;: "柱锤冲扩夯实混凝土桩桩身填料工程特性试验研究", 混凝土 * |
| 岳枭,李战争: "基于最佳含水量设计碾压混凝土配合比", 森林工程 * |
| 王守君;邵玉振;任瑞波;: "骨架密实型水泥稳定材料组成设计新方法探讨", 城市道桥与防洪 * |
| 王雨利;周明凯;李北星;管学茂;: "石粉对水泥浆密实度的影响", 武汉理工大学学报 * |
| 盛燕萍;殷惠卿;王光辉;李海滨;: "利用真空饱水法确定粗集料密度", 中外公路 * |
| 韦鲁滨;刘鹏;李凌月;李大虎;朱学帅;王思文;李鑫雨;: "空气重介质振动流化床入料特性与操作参数的协同研究", 煤炭学报 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106699077B (en) | A kind of assembled architecture bar connecting sleeve grouting material | |
| CN106946520A (en) | A kind of ultra-high performance concrete of the coarse aggregate containing basalt and preparation method thereof | |
| CN107265966A (en) | One kind prepares bridge self-compaction cracking resistance clear-water concrete using high fine powder content Machine-made Sand | |
| CN110734257A (en) | Preparation method of high impervious concrete | |
| CN107572936A (en) | Polymer foamed concrete and its production and use | |
| CN104386969B (en) | A kind of high-strength high-durability lightweight aggregate concrete and preparation method thereof | |
| CN107056214B (en) | A kind of fluorite cream base mending mortar | |
| CN108424073A (en) | A kind of high abrasion high-strength concrete and preparation method thereof | |
| CN106927776A (en) | A kind of ground builds reinforcement and repair natural hydraulic lime mortar of high-performance durable and preparation method thereof | |
| CN107117909A (en) | It is a kind of mixed with RPC of flyash and preparation method thereof | |
| CN111574103A (en) | Multi-component composite synergist for sprayed concrete and preparation method thereof | |
| CN110066158A (en) | Lightweight self-compacting concrete and preparation method thereof | |
| CN111253127A (en) | C30 carbon fiber broken brick recycled concrete and preparation method thereof | |
| CN110183165A (en) | The concrete and its preparation process of fly ash base geopolymer concrete and normal concrete knot | |
| CN113200727A (en) | Method for improving rheological property of PVA fiber and nano-silica cement-based composite material | |
| CN110759661A (en) | Recycled aggregate concrete workability improving additive | |
| CN111362636A (en) | C60 carbon fiber concrete and preparation method thereof | |
| CN108911638B (en) | Ground mortar combined bag and preparation method and using method thereof | |
| CN115124298B (en) | High-strength recycled aggregate concrete prepared from waste stone powder and preparation method thereof | |
| CN115557744A (en) | Method for optimizing ultrahigh-performance concrete by multi-factor parameter method | |
| JP6165447B2 (en) | Method for producing concrete with reduced bleeding | |
| CN109553349A (en) | Self-compacting active powder concrete and its preparation method and application | |
| CN112321227B (en) | Yellow river sand ultrahigh-performance concrete and preparation method thereof | |
| CN112551961A (en) | Regenerated UHPC cement concrete and preparation method thereof | |
| Prayuda et al. | The utilization of Lapindo powder as a material for high strength concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20230103 |