CN107434433A - A kind of production technology of the early strong steel fiber reinforced concrete of high-performance - Google Patents
A kind of production technology of the early strong steel fiber reinforced concrete of high-performance Download PDFInfo
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- CN107434433A CN107434433A CN201610358946.4A CN201610358946A CN107434433A CN 107434433 A CN107434433 A CN 107434433A CN 201610358946 A CN201610358946 A CN 201610358946A CN 107434433 A CN107434433 A CN 107434433A
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- concrete
- steel fibre
- fiber reinforced
- production technology
- reinforced concrete
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- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of production technology of the early strong steel fiber reinforced concrete of high-performance, it is comprised the steps of：S1, steel fibre and coarse aggregate stirred in advance in mixing plant according to a certain percentage, mixing time must not exceed 30s；S2, the coarse aggregate being stirred in advance and steel fibre mixture be placed individually into aggregate bin；S3, coarse aggregate and steel fibre mixture put into mixing plant, and stirred together with the other components of concrete, mixing time 60s；S4, stirring gained mixture poured, the continuous time that vibrator vibrates in each position in casting process should stop sinking with mixture, no longer effervescent and untill glowing cement mortar；After S5, concreting, after initial set terminates, maintenance operations are carried out to pouring surface.The present invention can effectively avoid steel fibre conglomeration, avoid concrete from occurring crack too early, improve the intensity of concrete, tension, bending resistance, shock resistance and the performance such as antifatigue.
Description
Technical field
The present invention relates to technical field of concrete, more particularly to one kind can effectively avoid steel fibre conglomeration, avoid concrete
Occurs the production technology of the early strong steel fiber reinforced concrete of high-performance in crack too early.
Background technology
At present, highway in China construction is in a kind of Rapid development stage, and its road surface uses bituminous paving mostly, and cement mixes
Solidifying soil surface accounts for small part.But China's pitch resource-constrained, greatly dependent on import, comparatively China's water
Mud yield is big, and distribution is wide, and various regions can be supplied on the spot, and cement concrete pavement has that rigidity is big, bearing capacity is strong, stability
Well, the advantages that service life is grown, and routine servicing expense is few.Therefore, to adapt to the needs of national economy fast and stable development, one is entered
Step accelerates the paces that highway in China builds particularly high-grade highway construction, imperative using cement concrete pavement.
The rupture strength of Portland cement concrete pavement is low, it is big to shrink, and is largely stretched, it is necessary to set during as top course
Contracting seam, and road surface thickness is larger.Therefore, lot of domestic and international scholar carries out the research work of this respect, how to improve concrete
Flexural capacity.
Find, Application No. CN200410016581.4 Chinese patent, disclose through the literature search to prior art
A kind of " improving rupture strength type road concrete additive ", the patent by mixed in normal concrete China and foreign countries a kind of additive with
Realize that concrete flexural strength improves, but do not solve the cracking of concrete well and largely flexible seam defect is set.Meanwhile
After cement concrete pavement pours, the maintenance of long period is generally required for, general concrete need to conserve 14-21 talent Ke Kai
Traffic is put, this also limits and constrained its large-scale application in road engineering.
In order to improve the rupture strength of concrete road surface, occur steel fiber reinforced concrete later, steel fiber reinforced concrete, be
A kind of new heterogeneous composite material that the short steel fibre of random distribution is formed is mixed in normal concrete.These random distributions
Steel fibre can effectively hinder the extension of inside concrete microcrack and the formation of macrocrack, significantly improve coagulation
Tension, bending resistance, shock resistance and the anti-fatigue performance of soil, have preferable ductility.
The production method of steel fiber reinforced concrete is at present：
1st, steel fibre is direct plungeed into concrete mixer, and the component such as sandstone, cement, additive stirs together, and put into and stir
Car is mixed to transport to job site.
2nd, after being transported to scene, concrete is directly poured to construction part, vibrates, be floating and conserved according to specification.
The shortcomings that certain be present in above method：First, steel fibre is directly to launch in mixer, and other components are together
Stirring, it is not easy to stir, and the easy conglomeration of steel fibre, balling-up, has a significant impact to concrete strength.In addition, often
The maintenance process of rule, generally maintenance in place, cause concrete shrinkage crack not in time, influence its tension, bending resistance, shock resistance and resist
The performances such as fatigue.
The content of the invention
In order to solve the problems of the prior art, it is an object of the invention to provide a kind of early strong steel fiber reinforced concrete of high-performance
Production technology, it can be such that steel fibre is well dispersed in concrete, effectively prevent steel fibre clustering phenomena, improve coagulation
The intensity of soil, and it is conserved immediately after initial set terminates, and avoids concrete and occurs crack too early, is improved tension, bending resistance, is resisted
Impact and the performance such as antifatigue.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of production technology of the early strong steel fiber reinforced concrete of high-performance, it is comprised the steps of：
S1, steel fibre and coarse aggregate stirred in advance in mixing plant according to a certain percentage, mixing time must not exceed
30s；
S2, the coarse aggregate being stirred in advance and steel fibre mixture be placed individually into aggregate bin；
S3, coarse aggregate and steel fibre mixture put into mixing plant, and stirred together with the other components of concrete, mixing time
For 60s；
S4, stirring gained mixture poured, the continuous time that vibrator vibrates in each position in casting process should be with
Untill mixture stops sinking, no longer effervescent and glows cement mortar；
After S5, concreting, after initial set terminates, maintenance operations are carried out to pouring surface.
Preferable scheme, in the concreting process described in step S4, water can not be added to construct concrete.
Further preferred scheme, it in step S4, should be aided with artificial levelling when vibrating, do face and carry out at twice, it is first levelling
It is floating, when concrete surface is without bleeding, remake floating for the second time.
Scheme still more preferably, maintenance described in step S5 are to control maintenance using wet, are first existed using covered rearing with plastic film
Concrete surface, the complete of plastic sheeting should be protected during maintenance；It is covered in again with straw bag, straw screen or mat on plastic sheeting, keeps mixed
Coagulate native dampness.
Preferable scheme, the ratio of the steel fibre and coarse aggregate are more than 10:1.
By using above technical scheme, a kind of production technology of the early strong steel fiber reinforced concrete of high-performance of the present invention with it is existing
Technology is compared, and its advantage is：
1st, the present invention is stirred steel fibre and aggregate in advance, steel fibre is well dispersed in concrete, is avoided steel fibre
Clustering phenomena, improve the intensity of concrete.
2nd, the present invention to the maintenance for pouring rear road surface is conserved immediately after initial set terminates, and avoids concrete and occurs too early
Crack, improve the tension on road surface, bending resistance, shock resistance and the performance such as antifatigue.
Embodiment
To make the object, technical solutions and advantages of the present invention of greater clarity, with reference to instantiation, to the present invention
It is further described.It should be understood that these descriptions are merely illustrative, and it is not intended to limit the scope of the present invention.In addition,
In illustrating below, the description to known features and technology is eliminated, to avoid unnecessarily obscuring idea of the invention.
A kind of production technology of the early strong steel fiber reinforced concrete of high-performance of the present invention, it comprises the following steps：
1st, first by steel fibre and coarse aggregate according to a certain percentage（The ratio of steel fibre and coarse aggregate is more than 10:1, the present embodiment choosing
Take 20:1）Stirred in advance in mixer, due to the characteristic of this life of steel fibre, mixing time is unsuitable long, must not exceed
30s.Long easy conglomeration.
2nd, by the coarse aggregate being stirred in advance and steel fibre mixture（It might have the slight conglomeration of steel fibre）, it is placed individually into bone
Feed bin.
3rd, in actual production process, mixture is put into mixer and the other components of concrete according to certain metering（Bag
Include the conventional composition cement of concrete in prior art, miberal powder, sandstone,）Stir, mixing time 60s, be sufficiently stirred together
Afterwards, the steel fiber reinforced concrete newly mixed does not have clustering phenomena substantially.Steel fibre is well dispersed in concrete, meets mix stirring
It is required that.
4th, the continuous time that vibrator vibrates in each position in casting process should stop sinking, no longer emits with mixture
Bubble and untill glowing cement mortar, it should be noted that should not cross to shake and leakage.It should not add water to concrete in concreting process
Construction.
It should be aided with when the 5th, vibrating artificial levelling.Face is done to carry out at twice.It is first levelling floating, treat concrete surface without bleeding
When, remake floating for the second time.Pay attention to time that is floating twice, smearing pressure and process.Should not separately external adding water be floating, smears pressure.
6th, after concreting, should be conserved in time after initial set terminates.Maintenance is controlled using wet, first using plastic sheeting
Concrete surface is covered in, the complete of plastic sheeting should be protected during maintenance；It is covered in again with straw bag, straw screen or mat on plastic sheeting,
Keep concrete dampness.
When making concrete road surface using above-mentioned technique, due to having carried out pre- stirring to steel fibre and aggregate first, make steel
Fiber is well dispersed in concrete, avoids steel fibre clustering phenomena；And steel fibre maintenance is supported immediately after initial set terminates
Shield, avoids concrete and occurs crack too early.
Above-mentioned embodiment is exemplary, is to preferably make skilled artisans appreciate that originally
Patent, it is impossible to be not understood as the limitation for including scope to this patent；As long as times made of spirit according to disclosed in this patent
How with change or modification, the scope that this patent includes is each fallen within.
Claims (5)
1. the production technology of the early strong steel fiber reinforced concrete of a kind of high-performance, it is characterised in that it is comprised the steps of：
S1, steel fibre and coarse aggregate stirred in advance in mixing plant according to a certain percentage, mixing time must not exceed
30s；
S2, the coarse aggregate being stirred in advance and steel fibre mixture be placed individually into aggregate bin；
S3, coarse aggregate and steel fibre mixture put into mixing plant, and stirred together with cement, miberal powder, sandstone, mixing time
For 60s；
S4, will stirring gained mixture poured, in casting process vibrator vibrated in each position mixture stop sink,
No longer effervescent and stop the stirring of the position when glowing cement mortar；
After S5, concreting, after initial set terminates, maintenance operations are carried out to pouring surface.
2. the production technology of the early strong steel fiber reinforced concrete of a kind of high-performance according to claim 1, it is characterised in that in step
In concreting process described in rapid S4, water can not be added to construct concrete.
A kind of 3. production technology of the early strong steel fiber reinforced concrete of high-performance according to claim 1, it is characterised in that step
In S4, using artificial levelling when vibrating, do face and carry out at twice, it is first levelling floating, when concrete surface is without bleeding, then carry out
Second floating.
A kind of 4. production technology of the early strong steel fiber reinforced concrete of high-performance according to claim 1, it is characterised in that step
Maintenance described in S5 is to control maintenance using wet, first ensures to protect plastics during concrete surface, maintenance using covered rearing with plastic film
Film it is complete；It is covered in again with straw bag, straw screen or mat on plastic sheeting, keeps concrete dampness.
5. the production technology of the early strong steel fiber reinforced concrete of a kind of high-performance according to claim 1, it is characterised in that described
The ratio of steel fibre and coarse aggregate is more than 10:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610358946.4A CN107434433A (en) | 2016-05-27 | 2016-05-27 | A kind of production technology of the early strong steel fiber reinforced concrete of high-performance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610358946.4A CN107434433A (en) | 2016-05-27 | 2016-05-27 | A kind of production technology of the early strong steel fiber reinforced concrete of high-performance |
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| CN107434433A true CN107434433A (en) | 2017-12-05 |
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| CN201610358946.4A Pending CN107434433A (en) | 2016-05-27 | 2016-05-27 | A kind of production technology of the early strong steel fiber reinforced concrete of high-performance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110281392A (en) * | 2019-07-08 | 2019-09-27 | 黄贺明 | A kind of ultra-high performance concrete vacuum stirring technique |
| CN113636817A (en) * | 2021-08-30 | 2021-11-12 | 西京学院 | Concrete containing recycled PVC aggregate and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58117123A (en) * | 1981-12-30 | 1983-07-12 | Kensetsu Kiso Eng Kk | Construction of steel fiber concrete |
| CN101280628A (en) * | 2008-05-23 | 2008-10-08 | 中建五局第三建设有限公司 | Ultra-fine sand high-strength high-performance concrete ultra-high pumping construction method |
| CN101913828A (en) * | 2010-08-19 | 2010-12-15 | 武汉理工大学 | High anti-cracking large volume radiation-proof concrete and construction process thereof |
| CN102108787A (en) * | 2010-12-29 | 2011-06-29 | 山西四建集团有限公司 | Construction method of ultra-high strength steel fiber concrete |
-
2016
- 2016-05-27 CN CN201610358946.4A patent/CN107434433A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58117123A (en) * | 1981-12-30 | 1983-07-12 | Kensetsu Kiso Eng Kk | Construction of steel fiber concrete |
| CN101280628A (en) * | 2008-05-23 | 2008-10-08 | 中建五局第三建设有限公司 | Ultra-fine sand high-strength high-performance concrete ultra-high pumping construction method |
| CN101913828A (en) * | 2010-08-19 | 2010-12-15 | 武汉理工大学 | High anti-cracking large volume radiation-proof concrete and construction process thereof |
| CN102108787A (en) * | 2010-12-29 | 2011-06-29 | 山西四建集团有限公司 | Construction method of ultra-high strength steel fiber concrete |
Non-Patent Citations (1)
| Title |
|---|
| 叶新平等: "《土木建筑工程施工工艺标准》", 31 July 2006, 国防科技大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110281392A (en) * | 2019-07-08 | 2019-09-27 | 黄贺明 | A kind of ultra-high performance concrete vacuum stirring technique |
| CN113636817A (en) * | 2021-08-30 | 2021-11-12 | 西京学院 | Concrete containing recycled PVC aggregate and preparation method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20191012 Address after: Building No. 869 Luoyang Road, Minhang District, Shanghai 201100 Applicant after: Shanghai Tianxing New Material Co., Ltd. Address before: Room 2218, North business building, two building, No. 551, Gao Ke Xi Road, Shanghai, Shanghai Applicant before: Shanghai Tianli Commodity Concrete Co., Ltd. |
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| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171205 |
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| RJ01 | Rejection of invention patent application after publication |