CN1458111A - Superhigh strength concrete - Google Patents
Superhigh strength concrete Download PDFInfo
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- CN1458111A CN1458111A CN 03126610 CN03126610A CN1458111A CN 1458111 A CN1458111 A CN 1458111A CN 03126610 CN03126610 CN 03126610 CN 03126610 A CN03126610 A CN 03126610A CN 1458111 A CN1458111 A CN 1458111A
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- concrete
- cement
- strength
- strength concrete
- carbon compound
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Abstract
The concrete with very high strength is produced with cement, ore powder, water, sand, stone and composite additive comprising carboxylic acid modified naphthalenesulfonate and carbon compound. The additive has very high water reducing rate, can disperse cement grains fully, raise the strength of the concrete greatly and reduce slump constant loss. The existence of the carbon compound makes the high strength concrete easy to convey and raises the durability and elastic modulus of concrete.
Description
Technical field
The invention belongs to the chemical building material technical field, in particular a kind of super high strength concrete.
Background technology
With the above general concrete proportioning that adopts high agglutinate consumption, high cement consumption of large fluidity high-strength concrete of 42.5P II silicate cement preparation C80, the C80 concrete often reaches phase 600kg/m at present
3Agglutinate, cement consumption reaches 400kg/m
3-500kg/m
3Though the concrete that high agglutinate consumption, high cement consumption are prepared reaches high-intensity requirement on ultimate compression strength, but because cement consumption, agglutinate consumption are too much, caused a series of inevitable defectives of concrete: for example, Young's modulus increases less, big, the concrete contraction of smaller, the concrete fragility of concrete tensile and compressive strength is big, hydration heat is high, because of the distortion of shrinking and the temperature difference causes big etc.
Chinese patent CN1074201A discloses a kind of " compound method of high-strength concrete ", and this method is the skill of a concrete construction routinely preparation high-strength concrete, in the ordinary course of things, adopts No. 525 silicate cement, and cement consumption is at 400-500kg/m
3, form according to cement minerals, choose naphthalene phosphorus compound additive 0.5-0.9% (by cement weight), mix in the concrete mixture with the aqueous solution, can produce the middle and high fluidised form high-strength concrete of C70-C90, its tensile pressure ratio with in, low-grade concrete is approximate.If adopt No. 425 ordinary Portland cements, cement consumption 500kg/m
3About, mix naphthalene phosphorus compound additive after, also can make the middle and high fluidised form high-strength concrete of C65-C69.The high-strength concrete that above-mentioned two kinds of cement are made, its slump-loss is few, and the slump is the flowing concrete of 230mm, in the time of temperature 20-30 ℃, lasts 1 hour, its slump decline 10-20mm, but every m
3Cement consumption up to 400-500kg.
Summary of the invention
Technical problem to be solved by this invention is: at the problem that prior art exists, propose a kind of super high strength concrete that loss is little, Young's modulus is high, cement consumption is few of the slump.
The present invention solves the technical scheme that its technical problem adopts: a kind of super-strength concrete, it is to be made by the starting material of following weight proportioning: cement 275-308kg, breeze 232-270kg, water 116-130kg, sand 679-720kg, stone 1063-1132kg, carboxyl acid modified naphthalenesulfonate and carbon compound compound additive 0.9-1.2% (in cement, breeze weight sum).
Beneficial effect of the present invention:
The present invention is because a kind of component of proposition is carboxyl acid modified naphthalenesulfonate and carbon compound compound additive, this admixture has high water-reducing rate, can fully disperse cement granules, greatly improve concrete intensity, reduce the loss of the slump, since the existence of carbon compound make high-strength concrete too thickness, the knot end, harden, the problem that is difficult to carry is resolved, concrete durability, Young's modulus are improved.The present invention and existing high-strength concrete compare, and cement consumption reduces to 275-308kg from 500-600kg, and it is 230mm that the present invention has prepared the slump, at the pump concrete of 32 ℃ of following 2 hours no slump-loss.
Embodiment:
Embodiment 1-3
Firmly build stirring station in the Guangzhou, adopt Guangdong show 42.5P II cement, medium sand M=2.6,1～3 centimeter grouan preparation super high strength concrete, 1m
3The each component consumption, the slump, 7d, 28d, 56d average intensity such as following table:
Table 1
| Embodiment | Cement (kg) | Breeze (kg) | Sand (kg) | Stone (kg) | Water (kg) | Admixture (kg) | The slump (mm) | Average intensity (MPa) | ||||
| Initially | ?2h | ?3d | ?7d | ?28d | ?56d | |||||||
| 1 | ????307 | ????232 | ????690 | ????1079 | ????116 | ????6.48 | ?225 | ?225 | ?77.1 | ?98.2 | ?113.4 | ?120.9 |
| 2 | ????290 | ????250 | ????690 | ????1079 | ????116 | ????6.48 | ?200 | ?205 | ?74.9 | ?92.8 | ?115.6 | ?125.4 |
| 3 | ????308 | ????272 | ????714 | ????1028 | ????130 | ????6.40 | ?220 | ?218 | ?71.6 | ?89.9 | ?109.4 | ?123.1 |
The concrete physical and mechanical property of table 2 embodiment 1-2
The result of the foregoing description is as follows:
| Embodiment | 28d axial compressive strength (Mpa) | 28d axial tensile strength (MPa) | Static elastic constant (MPa) |
| 1 | ????95.7 | ????5.72 | ????5.09×10 4 |
| 2 | ????94.8 | ????5.52 | ????4.99×10 4 |
| 3 | ????93.9 | ????5.60 | ????5.01×10 4 |
1. prepare 1m
3Super high strength concrete of the present invention, the consumption of cement is 290-308kg, has reduced 92-210Kg than the cement consumption 400-500kg of prior art.
2. the present invention has produced the super high strength concrete that high workability, 56 days intensity reach 120Mpa.
3. the slump-loss of super high strength concrete of the present invention is little, lasts 2h slump embodiment 1-3 free of losses.
4. 28d axial compressive strength, 28d axial tensile strength height.
5. the static(al) springform is up to 5 * 10
4About Mpa.
Claims (1)
1. super-strength concrete, it is to be made by the starting material of following weight proportioning: cement 275-308kg, breeze 232-270kg, water 116-130kg, sand 679-720kg, stone 1063-1132kg, carboxyl acid modified naphthalenesulfonate and carbon compound compound additive 0.9-1.2% (in cement, breeze weight sum).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03126610 CN1458111A (en) | 2003-05-21 | 2003-05-21 | Superhigh strength concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03126610 CN1458111A (en) | 2003-05-21 | 2003-05-21 | Superhigh strength concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1458111A true CN1458111A (en) | 2003-11-26 |
Family
ID=29430416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03126610 Pending CN1458111A (en) | 2003-05-21 | 2003-05-21 | Superhigh strength concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1458111A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058660A (en) * | 2014-05-30 | 2014-09-24 | 蚌埠华东石膏有限公司 | Fast-setting high-strength concrete and preparation method thereof |
| CN112430042A (en) * | 2020-12-11 | 2021-03-02 | 保利长大工程有限公司 | Low-rubber high-flow-state high-performance concrete and preparation method thereof |
-
2003
- 2003-05-21 CN CN 03126610 patent/CN1458111A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058660A (en) * | 2014-05-30 | 2014-09-24 | 蚌埠华东石膏有限公司 | Fast-setting high-strength concrete and preparation method thereof |
| CN104058660B (en) * | 2014-05-30 | 2016-02-10 | 蚌埠华东石膏有限公司 | A kind of quick-coagulating high-strength concrete and preparation method thereof |
| CN112430042A (en) * | 2020-12-11 | 2021-03-02 | 保利长大工程有限公司 | Low-rubber high-flow-state high-performance concrete and preparation method thereof |
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| WD01 | Invention patent application deemed withdrawn after publication |