CN107500670A - High performance concrete - Google Patents
High performance concrete Download PDFInfo
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- CN107500670A CN107500670A CN201710876249.2A CN201710876249A CN107500670A CN 107500670 A CN107500670 A CN 107500670A CN 201710876249 A CN201710876249 A CN 201710876249A CN 107500670 A CN107500670 A CN 107500670A
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- Prior art keywords
- high performance
- performance concrete
- concrete
- dosage
- cement
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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
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- 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 present invention relates to a kind of high performance concrete, including the following raw material：The 305kg/m of cement 2903, the 270kg/m of miberal powder 2203, the 30kg/m of silicon ash 203, the 114kg/m of water 1043, the 720kg/m of sand 6793, the 1135kg/m of stone 10703, the 9kg/m of ether modifiers modified polycarboxylic acid water reducer 83.Above-mentioned high performance concrete is compared with existing high-strength concrete, and cement consumption is from 500kg/m3It is reduced to 290 305kg/m3, cementitious matter dosage is from 600 750kg/m3Drop to 540 570kg/m3.The slump of above-mentioned high performance concrete is 230 250mm, 3 hours pump concretes without slump-loss at 32 DEG C, and the rewinding time is respectively less than 20s.
Description
Technical field
The present invention relates to technical field of concrete, more particularly to a kind of high performance concrete.
Background technology
At present, the large fluidity high performance concrete for preparing more than C100 typically uses 52.5PII portland cements, due to
Water-cement ratio is low, the few concrete cohesiveness of water consumption is big, easily hardened, transport and pumping difficulties.In proof strength, do not change glue
Than on the premise of, to reduce viscosity, improve pumpability, it has to using the water consumption improved on folk prescription coagulation, while improve water
The dosage of mud and cementitious matter.
Existing preparation more than C100 concrete, cementitious matter dosage are both greater than 600kg/m3, such as Guangzhou international financial center
C100 concrete cement dosages 500kg/m3, miberal powder 190kg/m3, silicon ash 60kg/m3, cementitious matter dosage reaches 750kg/m3。
Because cement and cementitious matter dosage are excessive, the cost of concrete is not only added, and causes concrete a series of not
Evitable defect.For example, the contraction of concrete is big, the heat of hydration is high, it is big, easy to crack, mixed to be deformed caused by contraction and the temperature difference
Solidifying native tensile and compressive strength is smaller, modulus of elasticity increases less, Brittleness of Concrete is big.
The content of the invention
Based on this, it is an object of the invention to provide a kind of high performance concrete.
Specific technical scheme is as follows：
A kind of high performance concrete, including the following raw material：
In wherein some embodiments, the dosage of cementitious matter is 540-570kg/m3, the dosage of the cementitious matter is described
The summation of cement, the miberal powder and the silicon ash dosage.
In wherein some embodiments, the dosage of the ether modifiers modified polycarboxylic acid water reducer is the cementitious matter dosage
1.2-1.5%.
In wherein some embodiments, the performance indications of the ether modifiers modified polycarboxylic acid water reducer are solid content 28-
32%, performance reaches GB8076--2008.
In wherein some embodiments, the rank of the miberal powder is S95 or S105, and specific surface area is more than 600m2/kg。
In wherein some embodiments, SiO in the silicon ash2Content be more than 90%, specific surface area >=20000m2/kg。
In wherein some embodiments, the particle diameter of the stone is 5-31.5mm, and crushing coefficient is 11.3.
In wherein some embodiments, the density one of the sand is (2.5-3.0) × 103kg/m3, modulus of fineness 2.7-
3.0。
In wherein some embodiments, the cement is 42.5PII portland cements.
In wherein some embodiments, the intensity rank of the high performance concrete is C100.
Above-mentioned high performance concrete is had high water-reducing rate, can filled using a kind of ether modifiers modified polycarboxylic acid water reducer
Divide scattered subparticle, the intensity of concrete is greatly improved, because the modification of based compound significantly reduces concrete
Viscosity so that high-strength concrete have to using high cement consumption, high cementitious matter dosage come reduce the viscosity of concrete, improve can
Pump, the method for transporting are able to Yi changes.Mixed by force so as to solve superelevation on the premise of low cement content, low cementitious matter dosage
Solidifying soil is excessively sticky, knot bottom, is difficult to the problem that conveys.Make a kind of brand-new ultra-high performance concrete.It has been greatly saved and has matched somebody with somebody
The raw material of concrete processed, and improve the stability of concrete, durability.
Above-mentioned high performance concrete is compared with existing high-strength concrete, and cement consumption is from 500kg/m3It is reduced to 290-
305kg/m3, cementitious matter dosage is from 600-750kg/m3Drop to 540-570kg/m3.The present invention is in low cement content, low cementitious matter
The slump has been prepared under dosage as 230-250mm, 3 hours pump concretes without slump-loss at 32 DEG C, rewinding time
Respectively less than 20s.
Brief description of the drawings
Fig. 1 is the concrete 3d aquation SEM photographs that embodiment 1 obtains；
Fig. 2 is the concrete seven d aquation SEM photographs that embodiment 1 obtains；
Fig. 3 is the concrete 28d aquation SEM photographs that embodiment 1 obtains；
Fig. 4 is the obtained concrete of comparative example 1 without slump photo.
Embodiment
For the ease of understanding the present invention, the present invention will be described more fully below.But the present invention can be with perhaps
More different form is realized, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is to make
Understanding more thorough and comprehensive to the disclosure.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
The arbitrary and all combination of the Listed Items of pass.
Raw material is as follows used by embodiments of the invention：
(1) water reducer
Ether modifiers are modified special polycarboxylate water-reducer, purchased from the newly-built chemical building material Science and Technology Ltd. in Guangzhou, model
HHPC-330, performance indications are：Meet GB8076-2008.
(2) cement
Guangzhou Zhujiang cement plant, Guangdong show 42.5PII portland cements.Composition, performance are shown in Table 1.
The cement composition of table 1, performance (%)
(3) miberal powder
Jiangmen city Zhong Jian Science and Technology Ltd.s water-granulated slag micro mist, specific surface area 600m2/ kg, chemical composition are shown in Table 2.
(4) silica flour
Guizhou Antaciron factory recovery dust by electricity powder, main component are unformed SiO2, specific surface area >=20000m2/ kg, change
Study and point be shown in Table 2.
The chemical composition (%) of the miberal powder of table 2, silica flour
(5) stone
Common granite stones, place of production Guangzhou, Huizhou, particle diameter 5-31.5mm, crush coefficient 11.3, gill shape 6-7%.
(6) sand
Xijiang River river sand, modulus of fineness 2.7-3.0, clay content ＜ 1%, density 2.7 × 103kg/m3
Embodiment 1-3
The embodiment 1-3 lists of ingredients of table 3 and its performance data
Other mechanical properties of the embodiment 1-3 of table 4 concrete
Because cement consumption is few, hydrogen-oxygen is can't see in 3,7,28d aquations SEM (concrete that embodiment 1 obtains) photo
Change calcium crystallization, it is a large amount of it is seen that hydrated calcium silicate crystallizes.Thus the interfacial characteristics of concrete is strengthened, and makes superelevation
Can concrete.
Comparative example 1,2 is the ether modifiers modified polycarboxylic acid water reducer used without using the present invention, and uses common poly- carboxylic
The concrete that sour water reducer is prepared.
Wherein the concrete mix of comparative example 1 with the present invention concrete mix it is identical, but prepare concrete and
Easily property is poor, the slump is small, can not be molded, the slump is damaged greatly.Initial only 160mm, it is almost that 0 (no slump photo is such as after 3 hours
Shown in Fig. 4), its mechanical property can not be tested.
Wherein the concrete mix of comparative example 2 uses usually used high cementitious matter match ratio.Its concrete prepared
Physical and mechanical property be not better than the present invention low cementitious matter dosage concrete.
The comparative example 1-2 lists of ingredients of table 5 and its performance data
Water reducer uses polycarboxylate water-reducer in upper table.
The comparative example 1-2 of table 6 mechanical performance of concrete
The above results show：
1. prepare 1m3High performance concrete of the present invention, cement consumption is 300-308kg, compared with prior art cement use
Amount 400-500kg reduces 110-200kg.
2. prepare 1m3High performance concrete cementitious matter dosage of the present invention be 540-570kg, compared with the cementitious matter of prior art
Dosage 680-750kg reduces 140-200kg.
3. prepare 1m3High performance concrete silicon ash dosage of the present invention be 28.6-30.0kg, compared with prior art silicon ash use
Measure 35-60kg and reduce 5-30kg.
4. the cohesiveness of the high performance concrete of the present invention is low, rewinding time equal ＜ 20s.Little loss of slump.In 3 hours
Almost free of losses.
5.28d axial compressive strengths, axial tensile strength are high.
6. static elastic constant reaches 58900MPa or so.
7th, compared with the existing concrete using polycarboxylate water-reducer, cementitious matter dosage significantly reduces.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of high performance concrete, it is characterised in that including the following raw material：
2. high performance concrete according to claim 1, it is characterised in that the dosage of cementitious matter is 540-570kg/m3, institute
The dosage for stating cementitious matter is the summation of the cement, the miberal powder and the silicon ash dosage.
3. high performance concrete according to claim 2, it is characterised in that the ether modifiers modified polycarboxylic acid water reducer
Dosage be the cementitious matter dosage 1.2-1.5%.
4. according to the high performance concrete described in claim any one of 1-3, it is characterised in that the ether modifiers are modified poly- carboxylic
The performance indications of sour water reducer are:Solid content 28-32%, performance reach GB8076--2008.
5. according to the high performance concrete described in claim any one of 1-3, it is characterised in that the cement is 42.5PII silicon
Acid salt cement.
6. according to the high performance concrete described in claim any one of 1-3, it is characterised in that the rank of the miberal powder is S95
Or S105, specific surface area are more than 600m2/kg。
7. according to the high performance concrete described in claim any one of 1-3, it is characterised in that SiO in the silicon ash2Content
More than 90%, specific surface area >=20000m2/kg。
8. according to the high performance concrete described in claim any one of 1-3, it is characterised in that the particle diameter of the stone is 5-
31.5mm, crushing coefficient are 11.3.
9. according to the high performance concrete described in claim any one of 1-3, it is characterised in that the density of the sand is (2.5-
3.0)×103kg/m3, modulus of fineness 2.7-3.0.
10. according to the high performance concrete described in claim any one of 1-3, it is characterised in that the high performance concrete it is strong
Degree is superior to C100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710876249.2A CN107500670A (en) | 2017-09-25 | 2017-09-25 | High performance concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710876249.2A CN107500670A (en) | 2017-09-25 | 2017-09-25 | High performance concrete |
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| Publication Number | Publication Date |
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| CN107500670A true CN107500670A (en) | 2017-12-22 |
Family
ID=60698880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710876249.2A Pending CN107500670A (en) | 2017-09-25 | 2017-09-25 | High performance concrete |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503260A (en) * | 2011-10-18 | 2012-06-20 | 合肥天柱包河特种混凝土有限公司 | Concrete |
| CN102643395A (en) * | 2012-05-07 | 2012-08-22 | 郑付营 | Water-reducing agent with strong adaptability to concrete aggregate and preparation method and application method of water-reducing agent |
| CN103708781A (en) * | 2013-12-20 | 2014-04-09 | 亚泰集团沈阳建材有限公司 | Low-chloride ion high-performance concrete |
| CN104829792A (en) * | 2015-05-12 | 2015-08-12 | 西南科技大学 | Method for preparing polyether modified polycarboxylic acid grinding aid |
-
2017
- 2017-09-25 CN CN201710876249.2A patent/CN107500670A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503260A (en) * | 2011-10-18 | 2012-06-20 | 合肥天柱包河特种混凝土有限公司 | Concrete |
| CN102643395A (en) * | 2012-05-07 | 2012-08-22 | 郑付营 | Water-reducing agent with strong adaptability to concrete aggregate and preparation method and application method of water-reducing agent |
| CN103708781A (en) * | 2013-12-20 | 2014-04-09 | 亚泰集团沈阳建材有限公司 | Low-chloride ion high-performance concrete |
| CN104829792A (en) * | 2015-05-12 | 2015-08-12 | 西南科技大学 | Method for preparing polyether modified polycarboxylic acid grinding aid |
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Application publication date: 20171222 |
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