CN104003682A - Ultra-high performance concrete - Google Patents
Ultra-high performance concrete Download PDFInfo
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- CN104003682A CN104003682A CN201410262231.XA CN201410262231A CN104003682A CN 104003682 A CN104003682 A CN 104003682A CN 201410262231 A CN201410262231 A CN 201410262231A CN 104003682 A CN104003682 A CN 104003682A
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- 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
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Abstract
The invention discloses ultra-high performance concrete. The ultra-high performance concrete comprises, by weight, 950 parts to 1000 parts of gel materials, 1057 parts to 1107 parts of aggregates, 171 parts to 180 parts of water, 78 parts of steel fibers, 14.25 parts to 15 parts of water reducing agents and 5.7 parts to six parts of antifoaming agents, wherein the aggregates comprise machine-made sand with the grain size from 3 mm to 5 mm, machine-made sand with the grain size from 1 mm to 3 mm and river sand with the grain size from 0.21 mm to 0.42 mm, and the mass ratio of the grain size from 3 mm to 5 mm to the machine-made sand with the grain size from 1 mm to 3 mm to the river sand with the grain size from 0.21 mm to 0.42 mm is 1:0.6:0.4. The gel materials comprise, by weight, 50 percent to 60 percent of Portland cement, 15 percent to 25 percent of high early strength cement and 15 percent to 25 percent of fine-ground cement. The grain size of the fine-ground cement ranges from two micrometers to 20 micrometers. The ultra-high performance concrete reduces cost, simplifies the maintenance technology and is good in performance.
Description
Technical field
The present invention relates to a kind of concrete formula, particularly a kind of ultra-high performance concrete.
Background technology
And famous, weather resistance is high, workability is high, intensity is high with its " three height " for ultra-high performance concrete (Ultra High Performance Concrete is called for short UHPC).Outstanding representative comprises RPC (Reactive Powder Concrete, be called for short RPC), slip casting fibrous concrete (Slurry Infiltrated Fiber Concrete, be called for short SIFCON) and engineering gelling composite gelled material (Engineering Cementitious Composites is called for short ECC).Wherein RPC (RPC) is the ultra-high performance concrete being most widely used at present.No matter RPC is at ultimate compression strength, folding strength, endurance quality, or in the performance of the aspect such as toughness and energy absorption capability apparently higher than normal concrete even high-strength concrete, especially tensile strength, overturned our understanding to conventional concrete material.Owing to possessing excellent material behavior, make RPC there is high engineering using value.
Still rest on the laboratory study stage for the research major part of ultra-high performance concrete (UHPC) at present, though existing a small amount of engineering application, but the material composition in existing RPC technology of preparing is expensive, and maintaining process complexity, has seriously limited its applying in engineering.Therefore, need to provide a kind of novel UHPC material, reduce preparation cost, and simplify maintaining process.
Summary of the invention
The present invention has designed and developed a kind of ultra-high performance concrete.
Technical scheme provided by the invention is:
A kind of ultra-high performance concrete, described ultra-high performance concrete comprises following composition, various compositions calculate with mass parts:
Gelling material: 950～1000 parts
Gather materials: 1057～1107 parts
Water: 171～180 parts
Steel fiber: 78 parts
Water reducer: 14.25～15 parts
Defoamer: 5.7～6 parts;
Wherein, described gathering materials comprises following composition: the river sand that the Machine-made Sand of particle diameter 3～5mm, the Machine-made Sand of particle diameter 1～3mm and particle diameter are 0.21～0.42mm, and the mass ratio of the river sand that wherein Machine-made Sand of the Machine-made Sand of 3～5mm, particle diameter 1～3mm and particle diameter are 0.21～0.42mm is: 1: 0.6: 0.4;
Described gelling material comprises following composition, and every kind of composition is to account for the percentage calculation of described gelling material total mass: silicate cement 50%～70%, rapid hardening cement 15%～25% and grinding fine cement 15%～25%; The particle diameter of described grinding fine cement is: 5～20 μ m.
Preferably, in described ultra-high performance concrete, described ultra-high performance concrete comprises following composition, and various compositions calculate with mass parts:
Gelling material: 980 parts
Gather materials: 1073 parts
Water: 176 parts
Steel fiber: 78 parts
Water reducer: 14.7 parts
Defoamer: 5.88 parts.
Preferably, in described ultra-high performance concrete, described gelling material comprises following composition, and every kind of composition is to account for the percentage calculation of described gelling material total mass: silicate cement 60%, rapid hardening cement 20% and grinding fine cement 20%.
Preferably, in described ultra-high performance concrete, described rapid hardening cement is aluminosulfate cement, and described silicate cement is P.O52.5 silicate cement, and described grinding fine cement is that the grinding of P.O52.5 silicate cement forms.
Preferably, in described ultra-high performance concrete, described ultra-high performance concrete adopts normal curing, is specially: curing temperature is 20 ± 2 DEG C maintenance relative humidity > 95%.
Preferably, in described ultra-high performance concrete, the diameter of described steel fiber is 0.22mm, and the length of described steel fiber is 13mm.
Preferably, in described ultra-high performance concrete, described water reducer is polycarboxylate water-reducer.
The present invention has designed a kind of ultra-high performance concrete.The first, the present invention ensureing under the prerequisite of ultra-high performance concrete indices, replaces expensive quartz sand with cheap river sand and Machine-made Sand, uses grinding fine cement replacement silicon ash, greatly saved cost; The second, the present invention, according to maximum tap density theory, uses cement, Machine-made Sand and the river sand of different-grain diameter to form best tap density, thereby makes the present invention have superstrength; The 3rd, in the present invention, also use rapid hardening cement, shorten the presetting period; The 4th, polycarboxylate water-reducer and defoamer in the present invention, are added, polycarboxylate water-reducer keeps compared with still obtaining good serviceability in the situation of low water-cement ratio ultra-high performance concrete, defoamer is eliminated in ultra-high concrete and is occurred bubble, ensure the internal structure of ultra-high concrete, thereby guaranteed concrete intensity; The 5th, according to the ultra-high performance concrete of invention recipe configuration, use normal temperature and pressure maintenance, simplify maintaining process.
Embodiment
Embodiment 1
A kind of ultra-high performance concrete, comprising:
P.O52.5 silicate cement 588kg, particle diameter are Machine-made Sand 320kg, river sand 219kg, water 176kg, steel fiber 78kg, polycarboxylate water-reducer 14.7kg and the defoamer 5.88kg that particle diameter is 0.21～0.42mm of Machine-made Sand 534kg, the particle diameter 1～3mm of P.O52.5 silicate cement 196kg, repaid hardening sulphoaluminate cement 196kg, the particle diameter 3～5mm of 5～20 μ m.The diameter of steel fiber is 0.22mm, and the length of steel fiber is 13mm.
Embodiment 2
A kind of ultra-high performance concrete, comprising:
P.O52.5 silicate cement 570kg, particle diameter are Machine-made Sand 332kg, river sand 221kg, water 171kg, steel fiber 78kg, polycarboxylate water-reducer 14.25kg and the defoamer 5.7kg that particle diameter is 0.21～0.42mm of Machine-made Sand 554kg, the particle diameter 1～3mm of P.O52.5 silicate cement 190kg, aluminium silicate salt rapid hardening cement 190kg, the particle diameter 3～5mm of 5～20 μ m.The diameter of steel fiber is 0.22mm, and the length of steel fiber is 13mm.
Embodiment 3
A kind of ultra-high performance concrete, comprising:
P.O52.5 silicate cement 600kg, particle diameter are Machine-made Sand 317kg, river sand 211kg, water 180kg, steel fiber 78kg, polycarboxylate water-reducer 15kg and the defoamer 6kg that particle diameter is 0.21～0.42mm of Machine-made Sand 529kg, the particle diameter 1～3mm of P.O52.5 silicate cement 200kg, aluminium silicate salt rapid hardening cement 200kg, the particle diameter 3～5mm of 5～20 μ m.The diameter of steel fiber is 0.22mm, and the length of steel fiber is 13mm.
Embodiment 4 according to following flow process and maintenance, prepares ultra-high performance concrete to embodiment 1～3.
Step 1, mixes water, polycarboxylate water-reducer and defoamer the mixed liquor A of preparation;
Step 2, the P.O52.5 silicate cement and the repaid hardening sulphoaluminate cement that are 5～20 μ m by 80% mixed solution and P.O52.5 silicate cement, particle diameter mix, and stir 5min
Step 3 adds the Machine-made Sand of particle diameter 3～5mm, the Machine-made Sand of particle diameter 1～3mm, river sand and remaining 20% mixed liquor A that particle diameter is 0.21～0.42mm in the mixture of step 2, stirs 4min;
Step 4 adds steel fiber in step 3, stirs 1min, obtains mixture B;
Step 5, is placed in mould by mixture B, and the 1min that vibrates on oscillating table (oscillation frequency is 50Hz) leaves standstill 24 hours, and mixture B is shaped, and removes mould;
Step 6, is placed in standard curing room (curing temperature is 20 ± 2 DEG C, and relative humidity is more than 95%) maintenance 28 days by the mixture B of shaping, and in maintenance processes, sprinkle water once every day to mixture B.
Performance Detection:
According to " GB/T 50081-2002 standard for test methods of mechanical properties of ordinary concrete ", the ultra-high performance concrete of preparing according to embodiment 1 proportioning and embodiment 4 is detected.
Detected result 1: cubic compressive strength reaches 120MPa, tensile splitting strength reaches 8MPa.
The ultra-high performance concrete of preparing according to proportioning that the present invention announces after testing, through normal curing, meets national standard completely.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in specification sheets and embodiment, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details.
Claims (7)
1. a ultra-high performance concrete, described ultra-high performance concrete comprises following composition, various compositions calculate with mass parts:
Gelling material: 950～1000 parts
Gather materials: 1057～1107 parts
Water: 171～180 parts
Steel fiber: 78 parts
Water reducer: 14.25～15 parts
Defoamer: 5.7～6 parts;
Wherein, described gathering materials comprises following composition: the river sand that the Machine-made Sand of particle diameter 3～5mm, the Machine-made Sand of particle diameter 1～3mm and particle diameter are 0.21～0.42mm, and the mass ratio of the river sand that wherein Machine-made Sand of the Machine-made Sand of 3～5mm, particle diameter 1～3mm and particle diameter are 0.21～0.42mm is: 1: 0.6: 0.4;
Described gelling material comprises following composition, and every kind of composition is to account for the percentage calculation of described gelling material total mass: silicate cement 50%～70%, rapid hardening cement 15%～25% and grinding fine cement 15%～25%; The particle diameter of described grinding fine cement is: 5～20 μ m.
2. ultra-high performance concrete as claimed in claim 1, is characterized in that, described ultra-high performance concrete comprises following composition, and various compositions calculate with mass parts:
Gelling material: 980 parts
Gather materials: 1073 parts
Water: 176 parts
Steel fiber: 78 parts
Water reducer: 14.7 parts
Defoamer: 5.88 parts.
3. ultra-high performance concrete as claimed in claim 1 or 2, it is characterized in that, described gelling material comprises following composition, and every kind of composition is to account for the percentage calculation of described gelling material total mass: silicate cement 60%, rapid hardening cement 20% and grinding fine cement 20%.
4. ultra-high performance concrete as claimed in claim 1 or 2, is characterized in that, described rapid hardening cement is aluminosulfate cement, and described silicate cement is P.O52.5 silicate cement, and described grinding fine cement is that the grinding of P.O52.5 silicate cement forms.
5. ultra-high performance concrete as claimed in claim 1 or 2, is characterized in that, described ultra-high performance concrete adopts normal curing, is specially: curing temperature is 20 ± 2 DEG C maintenance relative humidity > 95%.
6. ultra-high performance concrete as claimed in claim 1 or 2, is characterized in that, the diameter of described steel fiber is 0.22mm, and the length of described steel fiber is 13mm.
7. ultra-high performance concrete as claimed in claim 1 or 2, is characterized in that, described water reducer is polycarboxylate water-reducer.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104496320A (en) * | 2014-12-18 | 2015-04-08 | 南京工业大学 | Cement-based self-leveling mortar and preparation method thereof |
| CN106278048A (en) * | 2016-08-17 | 2017-01-04 | 中交第二航务工程局有限公司 | It is applicable to the preparation method of the anticorrosion cushion cap of marine environment |
| CN106517934A (en) * | 2016-10-18 | 2017-03-22 | 西安建筑科技大学 | Alkali-activating-agent-doped early strength super-high performance concrete and preparation method thereof |
| CN107265983A (en) * | 2017-08-08 | 2017-10-20 | 天津城建大学 | A kind of 180MPa ultra-high performance concretes and preparation method thereof |
| CN109386092A (en) * | 2018-12-05 | 2019-02-26 | 华侨大学 | A kind of constructing device and method of room temperature maintenance very-high performance steel core concrete column |
| CN109485345A (en) * | 2018-12-19 | 2019-03-19 | 广东工业大学 | A kind of ultra-high performance concrete and preparation method thereof of double-doped fiber |
| CN110563418A (en) * | 2019-10-30 | 2019-12-13 | 安徽海螺建材设计研究院有限责任公司 | Steam-curing-free ultra-high performance concrete and preparation method thereof |
| CN110835251A (en) * | 2019-12-10 | 2020-02-25 | 华东交通大学 | Ultrahigh-performance concrete and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104496320A (en) * | 2014-12-18 | 2015-04-08 | 南京工业大学 | Cement-based self-leveling mortar and preparation method thereof |
| CN106278048A (en) * | 2016-08-17 | 2017-01-04 | 中交第二航务工程局有限公司 | It is applicable to the preparation method of the anticorrosion cushion cap of marine environment |
| CN106278048B (en) * | 2016-08-17 | 2018-07-10 | 中交第二航务工程局有限公司 | Suitable for the preparation method of the anticorrosion cushion cap of marine environment |
| CN106517934A (en) * | 2016-10-18 | 2017-03-22 | 西安建筑科技大学 | Alkali-activating-agent-doped early strength super-high performance concrete and preparation method thereof |
| CN106517934B (en) * | 2016-10-18 | 2019-12-03 | 西安建筑科技大学 | One kind mixing early strong ultra-high performance concrete of alkali-activator and preparation method thereof |
| CN107265983A (en) * | 2017-08-08 | 2017-10-20 | 天津城建大学 | A kind of 180MPa ultra-high performance concretes and preparation method thereof |
| CN109386092A (en) * | 2018-12-05 | 2019-02-26 | 华侨大学 | A kind of constructing device and method of room temperature maintenance very-high performance steel core concrete column |
| CN109386092B (en) * | 2018-12-05 | 2021-02-02 | 华侨大学 | Construction device and method for normal-temperature maintenance of ultrahigh-performance concrete-filled steel tubular column |
| CN109485345A (en) * | 2018-12-19 | 2019-03-19 | 广东工业大学 | A kind of ultra-high performance concrete and preparation method thereof of double-doped fiber |
| CN110563418A (en) * | 2019-10-30 | 2019-12-13 | 安徽海螺建材设计研究院有限责任公司 | Steam-curing-free ultra-high performance concrete and preparation method thereof |
| CN110835251A (en) * | 2019-12-10 | 2020-02-25 | 华东交通大学 | Ultrahigh-performance concrete and preparation method thereof |
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