CN1032050A - Low plasticity vibro-roller compacted concret construction Craft - Google Patents
Low plasticity vibro-roller compacted concret construction Craft Download PDFInfo
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- CN1032050A CN1032050A CN 87107066 CN87107066A CN1032050A CN 1032050 A CN1032050 A CN 1032050A CN 87107066 CN87107066 CN 87107066 CN 87107066 A CN87107066 A CN 87107066A CN 1032050 A CN1032050 A CN 1032050A
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Abstract
The invention belongs to the concrete paving technical field.The present invention is the vibro-roller compacted concret of fly ash that paves in basic unit, waits to shake after the stone roller moulding, does not wipe one's face, and builds the inductile concrete of inductile concrete or fly ash immediately.The present invention has brought into play the length of two kinds of concrete construction process, has saved a large amount of cement, has reduced road surface cost, the planeness that has improved the road surface and application life.The present invention is applicable to the highway of each grade road surface highway and various climatological regions.
Description
The invention belongs to the concrete paving technical field.
Vibratory roller compacted concrete (being called for short vibro-roller compacted concret later on) 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 evenness of road surface is difficult for, fails to be extensive use of.There is one piece in " Concrete construction " magazine according in March, 1986 and is entitled as " State of the art:paving with roller compacted concrete " and reported 6.5 inches thick vibro-roller compacted concrets of surface layer making under the Canadian employing, 1.5 inches thick bituminous concretes of upper layer making.Obviously, making upper layer with bituminous concrete, to do upper layer application life than cement concrete short, and pitch raises the price significantly, approaching to the cost of cost that makes flexible pavement and cement pavement, even higher.
Purpose of the present invention both solves the high problem of wet concrete cement consumption with regard to being, solves the planeness problem on vibro-roller compacted concret road surface again, also in order further to improve the quality on road surface, reduces the road surface cost simultaneously.For this reason, the special employing of the present invention is surface layer under the vibro-roller compacted concret conduct of the fly ash of 2/3 thickness of making in the basic unit, improve pavement quality with the consumption that reduces cement, the inductile concrete that repaves the inductile concrete of building 1/3 thickness or fly ash is as upper layer, to improve the planeness on road surface.
Detailed construction technology of the present invention is: (basic unit can use any base material in basic unit, preferably use the lime fly ash aggregate base, because of its later strength height, after meeting water, intensity also continues to increase) the vibro-roller compacted concret compound of the fly ash that paves, shake after the stone roller moulding, do not wipe one's face, build the inductile concrete or the inductile concrete of fly ash immediately.
The used cement of the vibro-roller compacted concret of fly ash can adopt portland cement, Portland cement, portland slag cement and Portland cement for road, preferably uses Portland cement for road.Used coarse aggregate the largest particles particle diameter 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 cooperate by the size of particle diameter.The mud content of used sand should be lower than 5%, and the fines by 0.16 millimeter sieve aperture should be lower than 15%.Used Admixture is the M type water reducing agent of wooden calcium sulfonate's class, and its consumption is 0.2%, and the addition content of flyash is decided on the cement type label, is generally 20% of cement consumption.Used water should be used drinking water, and the basic principle of the match ratio 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 all are the mechanics index of physics according to engine request, select preferable water/binder ratio, under the condition that satisfies the construction working degree, select suitable unit consumption of water.The vigorous denseness V of the dimension of the vibro-roller compacted concret of fly ash
BBe advisable with 90～120 seconds.
The construction technology of the vibro-roller compacted concret of fly ash is: with the vibro-roller compacted concret compound of mixing machine mix fly ash, pave then earlier, its virtual resurfacing thickness should be 1.35 times of its compacted depth, and the length that at every turn paves is 20～25 meters, is the stone roller moulding of shaking at last.The stone roller machine deadweight of adopting of shaking is 8T ± 2T, and linear pressure is greater than 62.5 kg/cm, and low frequency is 1,500～2,000 time/minute, and high-frequency is 2,500～3,000 time/minute, and low-frequency amplitude is 0.9 millimeter, and high-frequency amplitude is 0.35～0.4 millimeter.Shake the stone roller machine to the vibro-roller compacted concret compound vibroroller cmpacting of the fly ash that paves the time, the stone roller machine that shakes is passed to compound to the vibration wave of fixed frequency and amplitude by vibrating wheels, and transmit from top to bottom, along with the difference of various composition material ratios in the compound and the workability difference of compound, the speed of transmission and be different along the attenuation degree of the degree of depth.The shop layer of compound is thick more, the vibrational energy that layer bottom, shop compound obtains just reduces more, 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 energy theorem E=2A(W+F/2 according to shaking) * n * N * (L/V)/(B * L) calculate.Wherein A is the amplitude (single width) of vibrating wheels, and W is the axial loading of vibrating wheels, and F is a vibromotive force, and V is the stone roller speed of shaking of stone roller machine of shaking, and L is the ground contact length of vibrating wheels, and n is a vibration frequency, and N is that shaking of vibrating wheels ground pass (back and forth), and B is the width of vibrating wheels.In order to guarantee the quality of vibro-roller compacted concret, the vibroroller cmpacting moulding divided for three steps carried out: earlier quietly roll (one back and forth) one time, be intended to make compound one-step forming just, easily become hole groove or wave when grinding in order to avoid shake.Inferior shaking with low frequency ground 2～3 times, and because of low frequency 1,500～2,000 time/minute is suitable for particle diameter is 20～40 millimeters coarse aggregate particles, and its stone roller that shakes is put in place, because of its amplitude is bigger, can make the vibration effect up to low layer.Shake with high frequency at last and grind 2～3 times, little moistening until concrete surface.Because of high frequency 2,500～3,000 time/minute amplitude is less, mainly acts on shallow-layer, and is suitable for fine particle in the compound, makes it fill coarse grained space, reduces the frictional force of compound, is convenient to produce thixotroping, makes mortar liquefaction.
After the vibro-roller compacted concret of fly ash shakes and grinds moulding, the inductile concrete or the inductile concrete of fly ash of paving immediately of not wiping one's face, its slump is 1 centimetre.Inductile Concrete Construction technology is identical with the normal concrete construction technology.
Should be emphasized that double-deck surface layer can adopt same label concreting, also can on label, use " going up excellent next time ", be that the high grade wet concrete is adopted on the upper strata, lower floor adopts the low grade vibro-roller compacted concret, vibro-roller compacted concret as No. 200 fly ashs, because of its later strength height, during the 180 day length of time, compressive strength can reach 300 kilograms per centimeter
2
The present invention has reached the designing requirement of pavement concrete fully, and the density of pavement concrete, early stage and later strength and crack resistance are improved, and has improved quality of concrete greatly.Its contract with dry rate is low, generally reaches (219～241) * 10 in 90 days
-6, anti-penetration grade reaches B
10More than.Doping quantity of fly ash the more, concrete contraction reduces more obviously.The limit stretch value of the vibro-roller compacted concret of fly ash is bigger than doing poor vibro-roller compacted concret, shows that thus 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
180Promptly reach No. 300 of 28 days requirement of strength.
The present invention has brought into play the length of two kinds of technologies (being vibro-roller compacted concret and normal concrete construction technology), and its comparable general concrete construction process is saved cement 30%, and the pavement engineering cost reduces by 8～10%, has improved the planeness and the application life on road surface simultaneously.Promote the use of at highway, urban road, airfield runway and civil engineering terrace, have remarkable economic efficiency and social benefit.In addition, the present invention's vibro-roller compacted concret of fly ash, new approach has been opened up in this comprehensive utilization to flyash, has reduced the pollution of flyash to environment.This invention is all suitable to the highway pavement of upper-lower hierarchy highway and different climatological regions.
Embodiment one: adopt the vibro-roller compacted concret of the fly ash of 2/3 thickness that paves in the basic unit to soap line extraordinarily in Pingshou, Shanxi colliery specialing line and Datong District, treat the vibroroller cmpacting moulding after, do not wipe one's face, immediately making inductile concrete.Surface layer adopts same label concrete (R up and down
28=300), save cement altogether and only use 2/3 of vibro-roller compacted concret entirely for individual layer.
Embodiment two: the low grade vibro-roller compacted concret (R of surface layer fly ash under adopting in Chaohu, Anhui
28=200), upper layer adopts the inductile concrete (R of high grade
28=300).Result of the test shows that following surface layer low grade vibro-roller compacted concret is when the 180 day length of time, and compressive strength still can reach 300 kilograms per centimeter
2More than.The upper and lower surface layer is saved cement 28.4% altogether, saves cement 35% with comprehensive layer of use vibro-roller compacted concret and is more or less the same.The rigid pavement that all this low plasticities shake and grind, its levels all in conjunction with well, do not have remarkable interface, and when doing strength test, the destruction face is not at the contact surface of levels.
Claims (4)
1, a kind of construction technology that is used for the low plasticity vibro-roller compacted concret of rigid pavement, it is characterized in that surface layer under the vibro-roller compacted concret of the fly ash that paves in the basic unit, after treating its stone roller moulding of shaking, build the inductile concrete of upper layer inductile concrete or fly ash immediately.
2, according to the construction technology of the said low plasticity vibro-roller compacted concret of claim 1, said shaking ground moulding process and is: roll (one back and forth) 1 time with quiet earlier, use low frequency 1 again, 500～2, shake for 000 time/minute and grind 2～3 times, use high frequency 2,500～3 at last, shake for 000 time/minute and grind 2～3 times, its stone roller pass that shakes decides with the stone roller energy that shakes that calculates.
3, according to the construction technology of claim 1 or 2 said low plasticity vibro-roller compacted concrets, it is characterized in that the low plasticity vibro-roller compacted concret can adopt same concrete grade or upper strata inductile concrete to adopt high grade, lower floor's vibro-roller compacted concret adopts low grade, latter's the best.
4, according to the construction technology of the said low plasticity vibro-roller compacted concret of claim 1, the Admixture that it is characterized in that the vibro-roller compacted concret admixture of fly ash is the class M of a wooden calcium sulfonate type water reducing agent, and consumption is 0.2%, the vigorous denseness V of the dimension of vibro-roller compacted concret
BIt is 90～120 seconds.
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 true CN1032050A (en) | 1989-03-29 |
| CN1004085B 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) |
Cited By (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 |
| CN104294729A (en) * | 2014-08-25 | 2015-01-21 | 四川金锋建设有限公司 | Method for constructing concrete pavement |
| CN104294717A (en) * | 2014-08-19 | 2015-01-21 | 刘宝帅 | Air cleaning and draining system for city road and method thereof |
| CN107746223A (en) * | 2017-10-19 | 2018-03-02 | 广东水电二局股份有限公司 | A kind of RCCD and its construction method |
-
1987
- 1987-10-24 CN CN87107066.9A patent/CN1004085B/en not_active Expired
Cited By (5)
| 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 |
| CN104294717A (en) * | 2014-08-19 | 2015-01-21 | 刘宝帅 | Air cleaning and draining system for city road and method thereof |
| CN104294729A (en) * | 2014-08-25 | 2015-01-21 | 四川金锋建设有限公司 | Method for constructing concrete pavement |
| CN107746223A (en) * | 2017-10-19 | 2018-03-02 | 广东水电二局股份有限公司 | A kind of RCCD and its construction method |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1004085B (en) | 1989-05-03 |
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