CN1004085B - Concrete pavement construction method - Google Patents
Concrete pavement construction method Download PDFInfo
- Publication number
- CN1004085B CN1004085B CN87107066.9A CN87107066A CN1004085B CN 1004085 B CN1004085 B CN 1004085B CN 87107066 A CN87107066 A CN 87107066A CN 1004085 B CN1004085 B CN 1004085B
- Authority
- CN
- China
- Prior art keywords
- concrete
- fly ash
- concret
- vibro
- inductile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 53
- 238000010276 construction Methods 0.000 title claims abstract description 14
- 239000010881 fly ash Substances 0.000 claims abstract description 36
- 239000004568 cement Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000010410 layer Substances 0.000 claims description 16
- 239000002344 surface layer Substances 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 9
- 241001504664 Crossocheilus latius Species 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000011398 Portland cement Substances 0.000 claims description 5
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 239000002893 slag Substances 0.000 claims description 2
- 239000003469 silicate cement Substances 0.000 claims 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 description 12
- 238000000465 moulding Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 239000011382 roller-compacted concrete Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- -1 calcium sulfonate's class Chemical class 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Landscapes
- Road Paving Machines (AREA)
- Road Paving Structures (AREA)
Abstract
The present invention belongs to the field of concrete paving technology. The invention is to spread the vibration-milled concrete mixed with fly ash on the base layer, and pour the low-plasticity concrete or the low-plasticity concrete mixed with fly ash immediately after the vibration-milled concrete is formed without plastering. The invention gives play to the advantages of two concrete construction processes, saves a large amount of cement, reduces the cost of the pavement, improves the flatness of the pavement and prolongs the service life of the pavement. The invention is suitable for roads with various grades of road surfaces and roads in various climatic regions.
Description
The invention belongs to concrete paving technical field.
Vibratory roller compacted concrete (being later called for short vibro-roller compacted concret) be external middle nineteen seventies grow up make the new technology of the closely knit moulding of harsh concrete with vibratory roller.This concrete has as surface layer, but because road surface is difficult for smoothly, fails to be widely used.In " Concrete constrction " magazine according in March, 1986, there is one piece and is entitled as " State of the art:paving with roller compacted concrete " vibro-roller compacted concret of having reported surface layer making 6.5 inchs under Canadian employing, the bituminous concrete of upper layer making 1.5 inchs.Obviously, making upper layer with bituminous concrete, to make upper layer than cement concrete short application life, and pitch significantly raises the price, to the cost of flexible pavement and the cost of cement pavement are approached, even higher.
Object of the present invention is just both to have solved the problem that wet concrete cement consumption is high, solve again the imperfect problem of planeness on vibro-roller compacted concret road surface, also in order further to improve pavement quality, reduce road surface cost, spy provides a kind of concrete pavement construction method for this reason simultaneously.The method is to adopt the vibro-roller compacted concret of the fly ash of making 2/3 thickness in basic unit as lower surface layer, to reduce cement consumption, the quality that improves road surface, repaves the inductile concrete of 1/3 thickness or the inductile concrete of fly ash as upper layer, to improve the planeness on road surface.
Adopt upper layer inductile concrete or fly ash inductile concrete, lower surface layer fly ash vibro-roller compacted concret road surface, its levels is in conjunction with good, destroys face not on levels contact surface without remarkable interface and while doing strength test.The density of pavement concrete, early stage and later strength and crack resistance are all improved, contraction, modulus of elasticity and fragility is corresponding reduction all, and planeness and the application life on road surface have also improved, and it has reduced cement consumption simultaneously, save cement 30%, the construction costs on road surface reduces 8%-10%.
Detailed construction technique of the present invention is: in basic unit, (basic unit can use any base material, preferably use lime fly ash aggregate base, because of its later strength high, meet after water, intensity also continues to increase) the vibro-roller compacted concret compound of the fly ash that paves, shake and be ground into after type, do not wipe one's face, build immediately inductile concrete or the inductile concrete of fly ash.
The vibro-roller compacted concret cement used of fly ash can adopt portland cement, Portland cement, portland slag cement and Portland cement for road, preferably uses Portland cement for road.Coarse aggregate the largest particles particle diameter used is 40 millimeters, and the concrete coarse aggregate the largest particles of upper layer inductile particle diameter is 20 millimeters, and coarse aggregate can divide three grades or secondary to coordinate by the size of particle diameter.The mud content of sand used should be lower than 5%, should be lower than 15% by the fines of 0.16 millimeter of sieve aperture.Admixture used is the M type water reducing agent of wooden calcium sulfonate's class, its consumption is 0.2%, the addition content of flyash is depending on cement type label, be generally 20% of cement consumption, water used should be used drinking water, the basic principle of the mix-design of the vibro-roller compacted concret of fly ash is identical with normal concrete, and only the former water supply volume is less.They are all the mechanics index of physics according to engine request, select preferably water/binder ratio, are meeting under the condition of construction working degree, select suitable unit consumption of water, the vigorous denseness V of dimension of the vibro-roller compacted concret of fly ash
8be advisable with 90～120 seconds.
The construction technology of the vibro-roller compacted concret of fly ash is: the vibro-roller compacted concret compound of first using mixing machine mix fly ash, then pave, its virtual resurfacing thickness should be approximately 1.35 times of its compacted depth, and the length that at every turn paves is 20～25 meters, is finally to shake to be ground into type.The mill deadweight of shaking adopting is for 8T ± 2T, and linear pressure is greater than 62.5 kg/cm, and low frequency is 1,500～2,000 beat/min, and high-frequency is 2,500～3,000 beat/min, and low-frequency amplitude is 0.9 millimeter, and high-frequency amplitude is 0.35～0.4 millimeter.The mill of shaking is in the time of the vibro-roller compacted concret compound vibroroller cmpacting to the fly ash paving, the mill of shaking is passed to compound by vibrating wheels the vibration wave of fixed frequency and amplitude, and transmit from top to bottom, along with the difference of various composition material ratios in compound and the workability difference of compound, transmit speed and be different along the attenuation degree of the degree of depth, the laying of compound is thicker, the vibrational energy that laying bottom compound obtains just more reduces, make compound evenly closely knit, just need suitable the stone roller time of shaking or the stone roller pass that shakes, the stone roller pass that shakes should grind according to shaking energy theorem E=2A(W+F/2) × n × N × (L/V)/(B × L) calculate.The amplitude (single width) that wherein A is vibrating wheels.W is the axial loading of vibrating wheels, and F is vibromotive force, and V is the stone roller speed of shaking of mill of shaking, the ground contact length that L is vibrating wheels, and n is vibration frequency, what N was vibrating wheels shake grinds number (back and forth), the width that B is vibrating wheels.In order to guarantee the quality of vibro-roller compacted concret, vibroroller cmpacting moulding divides three steps to carry out: first quiet roll one time (one is back and forth), be intended to make just one-step forming of compound, in order to avoid the easy one-tenth while stone roller that shakes is cheated groove or wave.The low frequency vibration of inferior use is ground 2～3 times, and because of low frequency 1,500～2,000 beat/min is suitable for particle diameter is 20～40 millimeters of coarse aggregate particles, and its stone roller that shakes is put in place, because its amplitude is larger, can make effect of vibration until bottom.Finally grind 2～3 times with high frequency vibrating, until concrete surface is micro-moistening.Because of high frequency 2,500～3, the amplitude of 000 beat/min is less, and Main Function is in shallow-layer, and is suitable for fine particle in compound, makes it fill coarse grained space, reduces the frictional force of compound, is convenient to produce thixotroping, makes mortar liquefaction.
The vibro-roller compacted concret of fly ash shakes and is ground into after type, inductile concrete or the inductile concrete of fly ash of paving immediately of not wiping one's face, approximately 1 centimetre of its slump.The concrete construction technology of inductile is identical with Normal Concrete Construction technique.
Should be emphasized that double-deck surface layer can adopt same label concreting, also can on label, use " upper excellent next time ", be that upper layer adopts high grade wet concrete, lower surface layer adopts low grade vibro-roller compacted concret, as the vibro-roller compacted concret of No. 200 fly ashs, because its later strength is high, when the 180 day length of time, compressive strength reach 300 kilograms per centimeter, has been " all-round excellent up and down ".
The present invention has reached the designing requirement of pavement concrete completely, and the density of pavement concrete, early stage and later strength and crack resistance are improved, and has greatly improved concrete quality.Its contract with dry rate is low, within 90 days, generally reaches (219～241) × 10
-6, anti-penetration grade reaches B
10above.The more, concrete contraction reduces more obvious doping quantity of fly ash.The limit stretch value of the vibro-roller compacted concret of fly ash is larger than dry poor vibro-roller compacted concret, shows thus, and the vibro-roller compacted concret crack resistance of fly ash is more superior than normal concrete, the intensity R of its No. 200 concrete half a year
180reach No. 300 of 28 days requirement of strength.Modulus of elasticity reduces by 15～20%, and the remarkable shortcoming-fragility of cement concrete is significantly reduced.
The present invention has brought into play the length of two kinds of techniques (being vibro-roller compacted concret and Normal Concrete Construction technique), and its comparable general concrete construction technology is saved cement 30%, and pavement engineering cost reduces approximately 10%, has improved planeness and the application life on road surface simultaneously.In highways and streets, airfield runway and civil engineering terrace promote the use of, and has significant economic benefit and social benefit.In addition, the vibro-roller compacted concret of fly ash for the present invention, new approach has been opened up in this comprehensive utilization to flyash, has reduced the pollution of flyash to environment.This invention is all applicable to the highway pavement in upper-lower hierarchy highway and Different climate area.
Embodiment mono-: adopt the vibro-roller compacted concret of the fly ash of 2/3 thickness that paves in basic unit in Pingshou, Shanxi colliery specialing line and Datong District to soap line extraordinarily, after vibroroller cmpacting moulding, do not wipe one's face, immediately making inductile concrete.Upper and lower surface layer adopts same label concrete (R
28=300), saving altogether cement is that logical layer is complete in 2/3 of vibro-roller compacted concret.
Embodiment bis-: the low grade vibro-roller compacted concret (R of surface layer fly ash under Chaohu, Anhui Province, China adopts
28=200), upper layer adopts the solidifying soil of the inductile (R of high grade
28=300).Result of the test shows, lower surface layer low grade vibro-roller compacted concret is in the time of the 180 day length of time, and compressive strength still can reach 300 kilograms per centimeter
2above.Upper and lower surface layer is saved cement 28.4% altogether, saves cement 35% be more or less the same with comprehensive layer of use vibro-roller compacted concret.All this low plasticities rigid pavement of grinding that shakes, its levels is all in conjunction with good, the remarkable interface of nothing, while doing strength test, destruction face is not at the contact surface of levels.
Claims (2)
1, a kind of concrete pavement construction method is included in the vibro-roller compacted concret of fly ash of 2/3 thickness that paves in basic unit as lower surface layer, shake and be ground into after type until it, build immediately the inductile concrete of 1/3 thickness or the inductile concrete of fly ash as upper layer, the technique of the type that is ground into that shakes is: first roll (one back and forth) 1 time with quiet, use again 1, 500～2, the low frequency vibration of 000 beat/min is ground 2～3 times, finally use 2, 500～3, the high frequency vibrating of 000 beat/min grinds 2～3 times, its stone roller pass that shakes decides with the stone roller energy that shakes calculating, the vibro-roller compacted concret of upper layer fly ash adopts silicate cement, Portland cement, portland slag cement, road silicate cement, lower surface layer coarse aggregate the largest particles diameter used is 40 millimeters, the Admixture of the vibro-roller compacted concret admixture of fly ash is the class M of wooden calcium sulfonate type water reducing agent, consumption is 0.2%, the addition content of flyash is depending on cement type label, for 20% of cement consumption, the vigorous denseness V of dimension of the vibro-roller compacted concret of fly ash
8it is 90～120 seconds.The concrete coarse aggregate the largest particles of upper layer inductile diameter is 20 millimeters, and fines passes through the fines of 0.16 millimeter of sieve aperture lower than 15%.
2, according to the said concrete pavement construction method of claim 1, the inductile concrete and the lower surface layer fly ash vibro-roller compacted concret that it is characterized in that upper layer inductile concrete or fly ash can adopt the inductile concrete of same concrete grade or upper layer inductile concrete or fly ash to adopt design grade, and lower surface layer fly ash vibro-roller compacted concret adopts compared with low grade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87107066.9A CN1004085B (en) | 1987-10-24 | 1987-10-24 | Concrete pavement construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87107066.9A CN1004085B (en) | 1987-10-24 | 1987-10-24 | Concrete pavement construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1032050A CN1032050A (en) | 1989-03-29 |
| CN1004085B true CN1004085B (en) | 1989-05-03 |
Family
ID=4815951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87107066.9A Expired CN1004085B (en) | 1987-10-24 | 1987-10-24 | Concrete pavement construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1004085B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748674B (en) * | 2008-12-03 | 2011-10-26 | 上海通用汽车有限公司 | Road construction method |
| CN104294717B (en) * | 2014-08-19 | 2016-06-15 | 刘宝帅 | A kind of urban road purification of air is held concurrently water exhaust system and method |
| CN104294729A (en) * | 2014-08-25 | 2015-01-21 | 四川金锋建设有限公司 | Method for constructing concrete pavement |
| CN107746223B (en) * | 2017-10-19 | 2020-03-24 | 广东水电二局股份有限公司 | Roller compacted concrete dam and construction method thereof |
-
1987
- 1987-10-24 CN CN87107066.9A patent/CN1004085B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1032050A (en) | 1989-03-29 |
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| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| C13 | Decision | ||
| CI01 | Publication of corrected invention patent application |
Correction item: Inventor Correct: Dou Cuiyuan False: Dou Cuiyuan Number: 13 Volume: 5 |
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| C14 | Grant of patent or utility model | ||
| ERR | Gazette correction |
Free format text: CORRECT FROM: INVENTOR DOU CUIYUAN TO: DOU CUIYUAN |
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| C19 | Lapse of patent right due to non-payment of the annual fee |