CN100369856C - Early strength micro expansion steel fiber road concrete - Google Patents
Early strength micro expansion steel fiber road concrete Download PDFInfo
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- CN100369856C CN100369856C CNB2006100271691A CN200610027169A CN100369856C CN 100369856 C CN100369856 C CN 100369856C CN B2006100271691 A CNB2006100271691 A CN B2006100271691A CN 200610027169 A CN200610027169 A CN 200610027169A CN 100369856 C CN100369856 C CN 100369856C
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- steel fiber
- early strength
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- road concrete
- micro expansion
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Abstract
The present invention relates to early strength micro-expansion steel fiber road concrete, which is used for the technical field of building engineering. The present invention comprises the following components by weight percentage: 10 to 15% of ordinary portland cement, 45 to 50% of coarse aggregate, 25 to 30% of fine aggregate, 4.1 to 6.55% of water, 1.5 to 1.8% of expansion agent, 3.0 to 3.5% of steel fiber and 0.35 to 0.45% of early strength water reducing agent. The present invention makes a full use of the characteristics of the steel fiber concrete, such as high anti-fold, high anti-impact, favorable abrasion resistance, etc. The poured cement concrete road surface has the advantages of short maintenance time, low maintenance cost and long service life, and simultaneously, effectively reduces, narrows or eliminates the expansion joint of the cement concrete road surface to eliminate, reduce and absorb noise, and has environment protection value.
Description
Technical field
The present invention relates to a kind of concrete, what be specifically related to is a kind of early strength micro expansion steel fiber road concrete.Be used for construction engineering technical field.
Background technology
At present, the highway in China construction is in a kind of Rapid development stage, and bituminous pavement is adopted on its road surface mostly, and cement concrete pavement accounts for a very little part.But China's pitch resource-constrained depends on import greatly, and China's cement output is big comparatively speaking, it is wide to distribute, and various places all can be supplied on the spot, and cement concrete pavement has, and rigidity is big, bearing capacity is strong, advantages such as good stability, long service life, routine servicing expense lack.Therefore,, further accelerate highway in China and build the particularly paces of high-grade highway construction, use cement concrete pavement imperative for adapting to the needs of national economy fast and stable development.
The folding strength of Portland cement concrete pavement is low, contraction is big, during as top course, a large amount of expansion joints need be set, and road surface thickness is bigger.Therefore, lot of domestic and international scholar carries out the research work of this respect, how to improve concrete flexural capacity.
Find through literature search prior art, Chinese patent application CN200410016581.4, patent name is " improving folding strength type road concrete admixture ", this patent improves to realize concrete flexural strength by mix a kind of admixture at home and abroad at normal concrete, but does not solve crack on concrete well and a large amount of expansion joints defective is set.Simultaneously, after cement concrete pavement pours, all need the maintenance of long period usually, but general concrete needs maintenance 14-21 talent open to traffic, this has also limited and has restricted its large-scale application in road engineering.
Summary of the invention
The objective of the invention is to provides a kind of early strength micro expansion steel fiber road concrete at deficiency of the prior art and defective, makes it be used for some quality concrete road surface cast, transform, thicken or repair, to realize quick open to traffic.
The present invention is achieved by the following technical solutions, and each component of the present invention and weight percent thereof are:
Ordinary Portland cement 10-15%
Coarse aggregate 45-50%
Fine aggregate 25-30%
Water 4.1-6.55%
Swelling agent 1.5-1.8%
Steel fiber 3.0-3.5%
Early strength water-reducing agent 0.35-0.45%
The present invention by ordinary Portland cement, coarse aggregate, fine aggregate, steel fiber, swelling agent, early strength water-reducing agent and water by a certain percentage at the road construction scene or concrete mixing plant stir the back casting form.Mainly be by the short steel fiber of admixture, make it disorderly in being distributed in concrete, stop concrete cracking and fissured development effectively, thereby reduce the setting at expansion joint, mixing of steel fiber improved concrete anti-folding, bending strength and multinomial performance such as shock-resistant, wear-resistant simultaneously.A certain amount of swelling agent of admixture, make concrete in process of setting, produce expansion,, promptly offset all or part of restriction and shrink with confined expansion with the contraction under the compensation working conditions, fundamentally eliminate the factor that causes concrete cracking, solve the crack on concrete problem.In order to realize that road traffic can opening in 3 days after concrete depositing, a certain amount of early strength water-reducing agent of admixture is to improve early age strength of concrete.Defective and deficiencies such as the present invention utilizes conventional commercially available starting material to make the cement concrete that meets the first-class road engineering, has solved in the present cement road engineering and has established the expansion joint more, and is easy to crack, fragile.
The starting material that the present invention adopts: cement should be selected the early strength silicate cement of 42.5 strength grades for use, it is the rubble of 5-40mm continuous grading that coarse aggregate is selected particle size range for use, fine aggregate is selected medium sand for use, fineness modulus is about 2.8, swelling agent is selected non-bleed type calcium aluminate class pulvis for use, early strength water-reducing agent is selected the early strong pulvis of the compound diminishing of Sulfates for use, steel fiber is easily selected the milling of steel fiber for use, has leg-of-mutton cross section, the footpath of distortion, one coarse, the anchor tail of the equal buckle in two ends, be of a size of 2.7mm * 0.4mm * 32mm, length-to-diameter ratio is 77.
The preparation method of the early strength micro expansion steel fiber road concrete that the present invention is above-mentioned mixes and stirs casting: 1. cement, swelling agent and early strength water-reducing agent were carried out dry mixing 30 seconds in the following order; 2. add coarse aggregate and fine aggregate, its churning time is 15 seconds-1 minute, 3. adds steel fiber, stirs 30 seconds; Add entry at last, stir into concrete mixture, its churning time is 2-3 minute.
Compare with other cement pavement concrete material, the invention has the advantages that: anti-folding, bending strength height, strong shock resistance, wear-resistant, there is not cracking, reduced maintenance cost, prolonged work-ing life; The expansion joint is provided with few, has made things convenient for construction, has improved speed of application, and the prolongation of expansion joint spacing has simultaneously improved the comfort level of driving, has reduced noise, helps the improvement of traffic environment; The road traffic open hour only need 3 days, have shortened curing cycle, have improved economic benefit.
Embodiment
Provide following examples in conjunction with content of the present invention:
The early strength micro expansion steel fiber concrete material, by ordinary Portland cement, coarse aggregate, fine aggregate, swelling agent, steel fiber, early strength water-reducing agent and water by a certain percentage, finish with following processing method: will carry out dry mixing 30 seconds by cement, swelling agent pulvis and the early strength water-reducing agent pulvis of proportioning design requirements earlier, add coarse aggregate and fine aggregate, its churning time is 15 seconds-1 minute, add steel fiber again, stirred 30 seconds; Add entry at last, stir into concrete mixture, its churning time is 2-3 minute.With the concrete mixture surfacing that stirs, and carry out suitable vibrating, vibrating time should not be above 2 minutes.Carry out suitable maintenance behind the casting, open route after 3 days.
The weight percent of the sound sucking high elasticity concrete material for road component concentration of preparation is as follows:
Above-mentioned four concrete mixs of executing example stir by stirring technique provided by the invention, the trade road construction of going forward side by side, and it has good workability.After the sclerosis, the concrete standard sample of made in the time of 3 days ultimate compression strength all reach more than the 35MPa, folding strength reaches more than the 6MPa.During the concrete road surface vehicle pass-through of cast, noise obviously descends, and it is comfortable to drive a vehicle.
Claims (7)
1. an early strength micro expansion steel fiber road concrete is characterized in that, each component and weight percent thereof are:
Ordinary Portland cement 10-15%
Coarse aggregate 45-50%
Fine aggregate 25-30%
Water 4.1-6.55%
Swelling agent 1.5-1.8%
Steel fiber 3.0-3.5%
Early strength water-reducing agent 0.35-0.45%.
2. early strength micro expansion steel fiber road concrete according to claim 1 is characterized in that, described ordinary Portland cement is the strong ordinary Portland cement morning of 42.5 strength grades.
3. early strength micro expansion steel fiber road concrete according to claim 1 is characterized in that, described swelling agent is non-bleed type calcium aluminate class pulvis.
4. early strength micro expansion steel fiber road concrete according to claim 1 is characterized in that, described steel fiber is the milling of steel fiber, and its size is 2.7mm * 0.4mm * 32mm, and length-to-diameter ratio is 77.
5. early strength micro expansion steel fiber road concrete according to claim 1 is characterized in that, described early strength water-reducing agent is the early strong pulvis of the compound diminishing of Sulfates.
6. early strength micro expansion steel fiber road concrete according to claim 1 is characterized in that, described coarse aggregate, and selecting particle size range for use is the rubble of 5-40mm continuous grading.
7. early strength micro expansion steel fiber road concrete according to claim 1 is characterized in that described fine aggregate is selected medium sand for use, and fineness modulus is 2.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100271691A CN100369856C (en) | 2006-06-01 | 2006-06-01 | Early strength micro expansion steel fiber road concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100271691A CN100369856C (en) | 2006-06-01 | 2006-06-01 | Early strength micro expansion steel fiber road concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1858018A CN1858018A (en) | 2006-11-08 |
| CN100369856C true CN100369856C (en) | 2008-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100271691A Expired - Fee Related CN100369856C (en) | 2006-06-01 | 2006-06-01 | Early strength micro expansion steel fiber road concrete |
Country Status (1)
| Country | Link |
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| CN (1) | CN100369856C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172820B (en) * | 2007-10-25 | 2010-04-14 | 武汉理工大学 | Method for producing high-strength high damping concrete |
| CN102503298B (en) * | 2011-10-25 | 2013-05-01 | 中铁六局集团有限公司 | Size-graded steel fiber elevating concrete and preparation method |
| CN102392405B (en) * | 2011-11-04 | 2013-09-11 | 广东冠粤路桥有限公司 | Super-early-strength super-rapid-hardening concrete pavement and construction method thereof |
| CN104961400A (en) * | 2015-06-29 | 2015-10-07 | 湖州华仑助剂科技有限公司 | Concrete |
| CN107522437A (en) * | 2016-06-22 | 2017-12-29 | 上海天利商品混凝土有限公司 | A kind of early strong steel fiber reinforced concrete of high-performance |
| CN107417198A (en) * | 2017-04-28 | 2017-12-01 | 罗章 | A kind of steel-fiber concrete road kerb and preparation method thereof |
| CN107628794A (en) * | 2017-09-01 | 2018-01-26 | 武汉市汉阳市政建设集团公司 | The pouring material and preparation method quickly repaired for Urban Bridge expansion joint concrete |
| CN109095835B (en) * | 2018-08-08 | 2020-07-28 | 同济大学 | Frost crack resistant concrete and preparation method thereof |
Citations (4)
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|---|---|---|---|---|
| JP2001240455A (en) * | 2000-03-01 | 2001-09-04 | Asahi Kasei Corp | Cured concrete material |
| JP2003104765A (en) * | 2001-09-27 | 2003-04-09 | Sumitomo Osaka Cement Co Ltd | Porous concrete molding for planting and its manufacturing method |
| CN1562860A (en) * | 2004-03-29 | 2005-01-12 | 武汉理工大学 | Steady inflated steel tube concrete and construction method |
| CN1772691A (en) * | 2005-09-22 | 2006-05-17 | 武汉理工大学 | Method of controlling expansion of steel pipe concrete precisely |
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2006
- 2006-06-01 CN CNB2006100271691A patent/CN100369856C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001240455A (en) * | 2000-03-01 | 2001-09-04 | Asahi Kasei Corp | Cured concrete material |
| JP2003104765A (en) * | 2001-09-27 | 2003-04-09 | Sumitomo Osaka Cement Co Ltd | Porous concrete molding for planting and its manufacturing method |
| CN1562860A (en) * | 2004-03-29 | 2005-01-12 | 武汉理工大学 | Steady inflated steel tube concrete and construction method |
| CN1772691A (en) * | 2005-09-22 | 2006-05-17 | 武汉理工大学 | Method of controlling expansion of steel pipe concrete precisely |
Non-Patent Citations (2)
| Title |
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| 大流动度钢纤维钢管混凝土配制技术. 王玉宝.水利水电科技进展，第23卷第2期. 2003 * |
| 新型低碱早强膨胀剂对混凝土性能的影响. 马保国.河南建材，第4期. 2001 * |
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| CN1858018A (en) | 2006-11-08 |
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Granted publication date: 20080220 Termination date: 20100601 |