CN103215872B - A kind of novel dew stone pavement construction method - Google Patents
A kind of novel dew stone pavement construction method Download PDFInfo
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- CN103215872B CN103215872B CN201210556610.0A CN201210556610A CN103215872B CN 103215872 B CN103215872 B CN 103215872B CN 201210556610 A CN201210556610 A CN 201210556610A CN 103215872 B CN103215872 B CN 103215872B
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Abstract
The invention belongs to highway engineering construction construction technology technical field.The dew stone road surface of " a kind of novel dew stone pavement construction method " making, essence is a kind of multicomponent epoxy radicals system containing solvent.Each component paves after mixing and stirring according to certain ratio and order, then evenly lays dew stone road surface and gathers materials, after cured, clear away unnecessary gathering materials, namely form dew stone road surface.
Description
One. art
The invention belongs to highway construction category, is highway engineering construction technical field of construction.
Two. background technology
Cement pavement because its intensity is high, the visual plurality of advantages such as good of good stability, driving at night moderate without rut, good endurance, cost. be subject to the attention of various countries' road agency.
But cement pavement also has some to be badly in need of the problem improved.
The skid resistance of cement pavement is that people are concerned about the problem more with research always.Along with the development of economic construction, road quality classification improves constantly, and the traffic volume increases, the speed of a motor vehicle is accelerated, and the antiskid problem of cement pavement becomes increasingly conspicuous, especially in rainy season, moist pavement skid resistance condition reduces greatly, easily makes vehicle slip out of control, causes casualties, the major accident such as property loss.To this, work out some antiskid technology both at home and abroad, as plucking, embossing, cutting, i.e. so-called " first generation, the second generation, third generation antiskid technology ".Show through Long-Time Service, road surface plucking is easily polished, and skid resistance decay is very fast, and road surface embossing, cutting are less to skid resistance increase, and the handstone in embedded groove easily makes road surface broken.So these technology are failed root wood and are solved the antiskid problem of cement pavement.
Along with the enhancing of people's environmental consciousness, the traffic noise that cement pavement produces is paid close attention to more, " noise road " has become the another synonym of cement pavement, and when road pavement using character requires to improve constantly, this defect can become the restraining factors of cement pavement development; Reduce highway traffic noise, particularly reduce dense population areas, the traffic noise closed in the quick industrial siding in city, tunnel, oneself is the problem that engineering department has to consider and solve.
The glare problem of cement pavement does not cause the attention of research and construction department always, but it is the key factor affecting person for driving a car's vision, and eliminating this adverse effect is improve the importance of cement pavement driving comfort, safety.
For adapting to Modern Traffic growth requirement, studying high antiskid, low noise and surface work endurable road surface Theory and technology be very important.
High antiskid, low noise and the endurable road surface of surface work should possess two kinds of structures: one is microtexture (horizontal direction 0 ~ 0.5mm, vertical direction 0 ~ 0.2mm), and it is the main because of rope of road surface anti-slide performance when affecting low vehicle speeds (speed of a motor vehicle is at 50km/h); The macrostructure (horizontal direction 0.5 ~ 50mm, vertical direction are 0.2 ~ 10mm) that open space, hole and groove between another kind is gathered materials by road surface form, it is the principal element of road surface anti-slide performance when affecting high speed traveling (speed of a motor vehicle is greater than 50km/h).The cement mortar that good sand, suitable sand coarse aggregate ratio and the cement of quality forms makes Portland cement concrete pavement surface have good microtexture, the antiskid requirement under low vehicle speeds can be met, in general, adopt the microtexture that bulky grain sand can make road surface keep certain, so cement pavement improves and keeps the key of anti-slide performance to be to form good macrostructure.
The realization of cement pavement low noise inhales noise mainly through the instantaneous pump reducing vehicle tyre and road surface, reduce the vibration noise between tire and road surface and obtain, the reduction of these two aspects also exists contradiction, coordinate this contradiction and can obtain the lower cement pavement of noise, namely become low noise cement pavement.And reducing pump, to inhale noise, impact noise and Coordination paths thereof be also by forming road surface macrostructure and realizing. correspondingly, road surface to the normal reflection of noise and tire the noise of blowing a whistle to Transverse notch also eliminated.
Making concrete dynamic modulus cement pavement, can form low noise cement pavement, because, more hole can reduce pump on the one hand and inhale noise, to the noise produced, there is certain absorption on the other hand, make the effect noise reduction on tire and road surface like this, thus reduce traffic noise.Abundant hole can make this kind of road surface have certain internal drainage function, under any weather conditions, all has good skid resistance. and mushy cement pavement is also that the one of antiskid low noise cement pavement is selected.But, because hole is many, road surface comprehensive mechanical property can be made to be difficult to meet the demands, directly be used as surface layer and can produce the problem being difficult to overcome.Therefore, need to seek more rational antiskid, low noise cement pavement.Exposed-aggregate cement concrete (Exposed-AggregateCement Concrete Pavemont is called for short EACCP) so a kind of road surface just.
Exposed-aggregate cement concrete, after surface layer cement concrete mixture making is shaping, spray dew stone agent and the health of plastic covering film, period carries out chemical treatment by dew stone agent effect to coagulating cement scholar surface course, delay the condensation of surperficial certain thickness cement mortar, but do not affect the concrete normal setting and harden of main body, after main body concrete reaches some strength, scrub its surface and carry out surface except slurry, expose equally distributed coarse aggregate, such formed cement pavement is exactly exposed-aggregate cement concrete (EACCP).
EACCP is except the features such as maintenance ordinary Portland cement pavement strength is high, long service life, maintenance costs are low, the macrostructure excellent due to it and microtexture, there is the functional performance of some excellences. first, pavement skid resistance condition is greatly improved, significantly increase at the anti-slide performance of rainy day especially, and the pavement skid resistance ability retention time is long, is not easily worn; Secondly, expose owing to gathering materials and reduce pump suction noise, traffic noise level is significantly reduced; EACCP forms diffuse reflection to strong light in addition, can eliminate or slow down the interference of dazzling light to driver, pedestrian, gets rid of and reflectively dazzles the eyes phenomenon, improves the security performance on road surface. and therefore, dew stone road surface has excellent functional performance and wide application prospect.
In China, the research on dew stone road surface, application are always under test and cannot spread, trace it to its cause and mainly contain following two aspects:
1. the making cost that the cost starched adds greatly road surface is removed on use and the surface of revealing stone agent
1. stone agent unit price is revealed: 50 yuan/kg, use amount 0.5kg/m
2, dew stone agent cost make dew stone road surface comparatively the every square meter of cement concrete pavement increase by 25 yuan;
2. the binder that will rinse out 4mm ~ 10mm in the forming process of stone road surface is revealed, cement concrete unit price: 1200 yuan/cube, the every square meter waste in dew stone road surface binder 4.8 yuan ~ 12 yuan;
3. reveal stone pavement curring film cost make dew stone road surface comparatively the every square meter of cement concrete pavement increase by 5 yuan;
4. waterwheel cost make dew stone road surface comparatively the every square meter of cement concrete pavement increase by 5 yuan;
5. labour cost (dew stone agent sprinkling, membrane curing, dispose superficial water cement mortar binding material) make dew stone road surface comparatively the every square meter of cement concrete pavement increase by 40 yuan/square meter;
The every square meter in dew stone road surface comparatively Portland cement concrete pavement cost increases by 79.8 yuan ~ 87 yuan;
For common expressway surface surface layer, thickness 28cm, maximum rubble 40mm, C20 concrete, 425 cement materials, cost is 70 yuan/every square.Dew stone pavement construction, makes top course cost add 114% ~ 124%, and general owner unit is all difficult to accept.
2. pavement construction complex process on existing dew stone coagulating cement, the sprinkling moment of dew stone agent, the length of overlay film conditioned time, surface are except the degree of starching, and the uniformity of dew stone height all can have influence on the effect on dew stone road surface.Before relevant speciality construction machinery is not developed, rely on artificial construction's difficult quality guarantee.
Three. summary of the invention
1. invent a kind of object of novel dew stone pavement construction method
Invent a kind of completely novel dew stone construction Craft, ensureing under the prerequisite meeting dew stone pavement technique index, making becomes instinct lower than existing dew stone construction Craft, construction technology greatly simplifies, workmanship stability significantly improves, use existing common construction machinery, dew stone construction quality of pavement can be ensured.
2. the present invention " a kind of novel dew stone pavement construction method " solves the technical scheme that its technical problem adopts.
The dew stone road surface of the present invention's " a kind of novel dew stone pavement construction method " making, essence is a kind of multicomponent epoxy radicals system containing solvent.Each component paves after mixing and stirring according to certain ratio and order, then evenly lays dew stone road surface and gathers materials, after cured, clear away unnecessary gathering materials, namely form dew stone road surface.The aggregate requirements of the present invention's " a kind of novel dew stone pavement construction method " uses single particle size, particle size 4 ~ 5mm, aggregate both true qualities, also dyeing or colour; The cementitious matter of the present invention's " a kind of novel dew stone pavement construction method ", both true qualities, also colored, paving thickness should be 2/3 of selected aggregate average thickness, too thick anti-skidding, the anti-acoustic capability affecting road surface; Too thin aggregate bonding incessantly.The feature of the present invention's " a kind of novel dew stone pavement construction method " is, the function of wear-resisting, anti-skidding, anti-dazzle, the draining in dew stone road surface is only undertaken on novel dew stone road surface, and the intensity revealing stone road surface is met by original pavement strength.
The dew stone road surface of the present invention's " a kind of novel dew stone pavement construction method " making, can make colored dew stone road surface, the scope of application on the dew stone road surface greatly expanded.
A kind of novel dew stone pavement construction method (test section) of the present invention:
1.. treatment of road surfaces (Fig. 1)
Before a kind of novel dew stone pavement construction method construction of the present invention, if there are the diseases such as hole groove, crack, pollution on its bottom road surface, should process in advance.
2. road surface (Fig. 2) is swept
Before sticking layer oil brushing, reply is carried out cleaning for construction road surface, dust removal process
3. Continuous pressing device for stereo-pattern (Fig. 3)
Should immediately along the outer Continuous pressing device for stereo-pattern for construction part after dust removal process
4. should fit (Fig. 4) as far as possible adhesive tape and ground
5.. prepare sticking layer oil (Fig. 5) to scale
6.. brushing sticking layer oil (Fig. 6)
Should try one's best evenly during brushing sticking layer oil, will can fill the road surface sticking layer oil that do not have again for construction road surface and pile up
7.. prepare cementitious matter (Fig. 7) to scale
Start to prepare cementitious matter for after the sticking layer oil initial set that construction road surface is brushed, stir during preparation cementitious matter and should try one's best fully (mixing time 5 ~ 10 minutes), should finish using within the time short as far as possible after having stirred.
8., after sticking layer oil parches, brushing (sprinkling) cementitious matter, thickness is 2/3 (Fig. 8) of selected building stones average grain diameter
9. eight. shed building stones (Fig. 9)
The later spreading aggregate immediately of brushing adhesive ramming material, aggregate should cover all cementitious matters
10.. tear-off adhesive tape (Figure 10)
Can tear-off adhesive tape (spreading aggregate 2 hours) during dew stone road surface initial set
(11). reclaim aggregate (Figure 11)
After the solidification of dew stone road surface, unnecessary aggregate can be regained by (aggregate spreading 6 hours).Regain after aggregate should sieve by aggregate size and continue to use.The road surface application Strongh vacuum cleaner reclaiming aggregate reclaims aggregate again.
3. the inspection on the present invention " a kind of novel dew stone pavement construction method " road surface of constructing
(1). the inspection of cling property
Road surface cling property under moist unfavorable conditions reduces greatly, easily causes traffic accident, and dew stone surface has good surface drainage performance, and effective contact area on energy oversize tyre and road surface, provides enough coefficients of sliding resistance, reduces accident rate.
Macrostructure as road surface factor can be evaluated by the average texture depth of current specifications method (MTD) index: usually adopt sand volumetric method to measure, know that the standard sand stand of capacity is filled out clean and in the road surfaces texture of drying by oneself, measure the area that it covers, by
This calculates average texture depth (MTD).General MTD is larger, and surface macro texture is abundanter, and during high vehicle speeds, road surface anti-slide performance is higher;
Longitudinal cling property skid resistance index SN on dew stone road surface evaluates: the trailer that code test tire is housed, and travels at the moist road surface of watering with standard speed (being generally 60km/h). and measurement testing wheel is fully latched (100% slip rate) or with tractive force F required during a certain fixing slip rate (as 86%) slippage
t, divided by the useful load P on wheel, just can obtain friction factor, be called braking force coefficient BFC, also can be described as skid resistance index SN
The horizontal cling property sideway force coefficient SFC on dew stone road surface evaluates: the testing wheel on trailer and travel direction deflect certain angle, lateral force Fs suffered when measuring this wheel slip, divided by the useful load P on wheel, just can obtain wasting resistance coefficient. be referred to as sideway force coefficient SFC
The method evaluating current road cling property in current design criteria has manual sand patch method, electronic sand patch method, laser texture meter method, portable pendulum tester method, braking distance method and friction coefficient testing car method (longitudinal force coefficient method, cornering ratio method).
(2). the detection of noise reduction performance
According to China the Law on Environmental Protection of the People's Republic of China; on August 19 " standard for acoustic environmental quality " in 2008 (GB 3096-2008), noise testing standard related to this comprises: " acoustics, environmental noise measurement method " GB/T 3222-1994, " city regional environment noise measuring method " GB/T 14623-1993. two measurement standards are applicable to the measurement of urban area environment, main line of communication noise.
Sound pressure level, sound intensity level or sound power level are generally adopted to the objective measurement of noise, but from equal loudness contour, the subjective sensation of people is also by frequency influence.In order to make measuring of sound experience consistent with human auditory system, at measuring apparatus, as all weighting network of device to frequency on sound level meter, i.e. wave filter.It establishes certain decay to received sound by frequency band. and simulate the auditory properties of people's ear, the sound level obtained like this is called weighted sound level.Weighting network can be divided into A, B, C and Lin weighting network, and some sound level meters also have D weighting network.Measured sound pressure level is called A, B, C, D sound level, C and Lin is also called overall sound pressure level.Due to tested sound by A network time, low-frequency range has larger decay, compares and meets people's ear sense of hearing feature poorer than high frequency sound to the sensitivity of all-bottom sound, and thus now general is in the world A sound level, is denoted as dB (A),
(3). pavement reflecting service check method
High intensity object in the visual field or strong luminance contrast thing make observer produce worry, and produce uncomfortable or visual function and sighting distance reduction phenomenon, are called dazzle.
We know, cement pavement is commonly referred to " white pavement ", when light irradiates thereon, strong reflex can occur.Driver drives a vehicle for a long time on cement pavement, and eyes can feel uncomfortable, time especially summer, sunlight was strong.In this case, in order to the fatigue of easing eyes, usual rider can turn to other places sight line, but driver can not.Because driver will reach safe, quick, comfortable object when driving, just must observe the road conditions in front all the time, when the asthenopia of driver cannot be alleviated, just likely cause the generation of traffic accident.
Bring unfavorable and dangerous glare phenomenon for driver, people are existing to be familiar with, but does not take concrete measure to solve.Therefore study suitable measure to alleviate and eliminate the harm of this phenomenon, to improve the security performance on road surface, it is very necessary for reducing traffic accident.
For road surface, the reflective function of road table structure road pavement has considerable influence.Asphalt concrete pavement, as dark-coloured pavement, is better than cement concrete pavement in reflective, anti-dazzle, and reveals particularly colored dew stone road surface, stone road surface, and due to the structure of itself uniqueness, reflective function is greatly improved than traditional cement pavement.
Particularly gathering materials of exposing of colored dew stone road surface itself has certain color on dew stone road surface, and it can absorb some light, alleviates the intensity of road reflection, and gathering materials of exposing forms excellent micro-, macrostructure, can form diffuse reflection to strong light.
This optical characteristics can prevent sunlight dazzling, provides the environment of safety and comfort to driver and pedestrian.
The method of inspection:
1) with the black cloth of middle with hole or black paper, measurement plate is covered, open light source, project light onto the measurement plate at hole place, and record θ, Ψ, r, R.
2) under identical measurement environment, the scattering coefficient K of reference plate magnesium plate is measured.。
3) change the value of θ, Ψ, R, carry out comparing and measuring under different modes.
Four. accompanying drawing explanation
Fig. 1 is treatment of road surfaces schematic diagram
Fig. 2 sweeps road surface schematic diagram
Fig. 3 is Continuous pressing device for stereo-pattern schematic diagram
Fig. 4 should fit schematic diagram in adhesive tape and ground as far as possible
Fig. 5 prepares sticking layer oil schematic diagram to scale
Fig. 6 is brushing sticking layer oil schematic diagram
Fig. 7 prepares cementitious matter schematic diagram to scale
Fig. 8 is brushing (sprinkling) cementitious matter schematic diagram
Fig. 9 sheds building stones schematic diagram
Figure 10 is tear-off adhesive tape schematic diagram
Figure 11 reclaims aggregate schematic diagram
Figure 12 is antiskid value and construction depth relation schematic diagram
Figure 13 to be antiskid value with dew stone count relation schematic diagram
Figure 14 is the antiskid pendulum value contrast schematic diagram of various sample plate
Figure 15 is antiskid value attenuation verses schematic diagram
Figure 16 is antiskid pendulum value and construction depth relation schematic diagram
Figure 17 is the driving noise schematic diagram on different road surface
Figure 18 is various pavement skid resistance value test chart
Figure 19 is the scattering coefficient chart on various road surface
Five. detailed description of the invention
We are in September, 2011 making test section of 1000M on the town road of Quanzhou City of Fujian Province fabric width 24 meters.Wherein, aggregate adopts Chinese red ceramic particle, and particle diameter is respectively 2,2.5,3,3.5,4,4.5,5,5.5,6,9 and has respectively done 100 meters.
1. cling property
Consider that revealing stone surface cling property is mainly subject to the impact of the microtexture factor on the macrostructure between dew stone granulate surface distributed situation, dew stone granulate and dew stone granulate surface. reveal contacting between stone Surface Anti-slide and pavement state to find, antiskid value, construction depth experiment is carried out respectively in 66 dew stone surface samples, carry out dew stone in length of side 10cm square area centered by antiskid test point to count test, result of the test is shown in Figure 12, Figure 13, Figure 18:
As can be seen from Figure 12 antiskid value and construction depth relation, when construction depth is less than certain value (about 1.0mm), antiskid value and construction depth are proportionate, when construction depth is greater than this value, antiskid value and construction depth are negative correlation. and to count relation as can be seen from Figure 13 antiskid value and dew stone, when dew stone is counted and is less than certain value (110), antiskid value is counted with dew stone and is proportionate, when dew stone is counted and is greater than this value, antiskid value is counted in negative correlation with dew stone. and after revealing stone process, the construction depth of concrete surface increases, coarse aggregate dew stone in unit area is counted minimizing, antiskid value under moist unfavorable conditions increases with the construction depth increase on dew stone surface, cling property strengthens. and the construction depth along with dew stone surface continues to increase, coarse aggregate dew stone in unit area is counted and is continued to reduce, antiskid value along with in surface unit area coarse aggregate dew stone count reduce and reduce, cling property declines on the contrary to some extent. therefore, the cling property of exposed-aggregate concrete pavement and the construction depth on surface, coarse aggregate dew stone in unit area is counted relevant.
That the corresponding dew stone degree of depth is 1.83mm when construction depth is 1mm, and reveal that the stone degree of depth is aggregate size 1/3, therefore recommend best aggregate size to be 5.5mm.
By drawing to draw a conclusion to upper table data analysis:
1.. in oil pollution situation, the antiskid pendulum value on this technique dew stone road surface is greater than other road surface types antiskid pendulum values;
Can see from Figure 18 and Figure 14, under same oil degree of contamination, the skid resistance on this technique dew stone road surface is better than the road surface of other types, having under regimen condition, this technique dew stone pavement skid resistance value is on average at about 55BPN, and flexible pavement is 50BPN, cutting rigid pavement is 40BPN, and light surface concrete road surface is only 32BPN; In slight oil pollution situation, the antiskid value on this technique dew stone road surface can remain between 28 ~ 22BPN, flexible pavement is 21BPN, cutting and light surface concrete road surface can only remain between 10 ~ 16BPN, this species diversity is when oil pollution is more serious, still exist: construction depth is that this technique of 0.75mm reveals stone road surface and construction depth is the asphalt concrete pavement of 0.76, both construction depths are roughly the same, but under the oil pollution of same degree, the antiskid value on this technique dew stone road surface is greater than asphalt concrete pavement.
2. the antiskid rate of decay in dew stone effect of depth oil pollution situation
Reveal the large dew stone road surface of the stone degree of depth under oil pollution, it is comparatively slow that pavement skid resistance value increases early stage decay with degree of contamination, reveals the stone degree of depth little, and early stage decay is very fast, but the last antiskid value revealing stone road surface all will tend towards stability, as shown in figure 15.
For the dew stone road surface that Figure 15 construction depth is 1.0mm, when being less than 10g by oil mass, this less with low on fuel to fill up the space between gathering materials, so the decay of friction factor is slow, and when reaching 10g by oil mass, machine oil has filled up the space between gathering materials completely, and form continuous print pasta on the surface of exposed concrete, pavement skid resistance value drops to 13BPN from 20BPN, declines by a big margin.And construction depth is the dew stone road surface of 0.34mm, during with oil mass 6g, surface just forms approximately continuous oil film, pavement skid resistance value decays to 14BPN from 21BPN, and attenuation ratio is very fast, increases by oil mass again, surface is still one deck oil film, and pavement skid resistance value has small decay and substantially tends towards stability.
Under having regimen condition, friction factor is along with the situation of dew stone change in depth is as Figure 16.As can be seen from the figure, after the certain construction depth of acquisition (0.7mm), the increase change of the friction coefficient dew stone degree of depth is less.After construction depth is greater than 1.0mm, the friction coefficient is revealed the increase of the stone degree of depth and diminishes.
2. anti-acoustic capability
In September, 2011, Quanzhou City's municipal administration this technique dew stone pavement test road is built complete, late November has carried out noise testing then. key instrument: Santana's car selected by sound level meter, test carriage. and test procedure: 1. measuring point is apart from driving center line 7.5M, sound level meter distance ground vertical distance 1.2M; 2. test carriage respectively with 40,60,80,100km/h speed exercises, record sound level meter reading time nearest apart from test point, parallel testing record 3 ~ 4 groups of data.
Experiment section, stone road surface is revealed for this technique and carries out road traffic noise test respectively with the Portland cement concrete pavement experimental section paved under condition, test result is as shown in figure 17. as can be seen from Figure 6, this technique dew stone road surface is compared with the driving noise of Portland cement concrete pavement, noise reduction 4.7dB (A) is run at a low speed at 40km/h, at 60km/h speeds noise reduction 4.7dB (A), at 80km/h speeds noise reduction 5.3dB (A), and when 100km/h runs at high speed noise reduction 7.7dB (A), noise reduction percentage is the increase of 9.59%. along with road speed, the noise reduction on dew stone road surface is more and more obvious, noise reduction amplitude is more and more large. therefore, this technique dew stone road surface has prospect widely in quick main line highway construction application.
3. anti-dazzle performance
In order to investigate the anti-dazzle function of exposed concrete, in test room, contrast test is done to this technique dew stone road surface test plate (panel) reflective function.
Be divided into three kinds of modes in the measurements:
1. r
1=31cm, R
1=110.5cm, Ψ
1=0, θ
1=35 °, r
1'=30cm (asphalt plank)
②r
2＝r
1，R
2＝113cm，Ψ
2＝21°，θ
1＝θ
2
③r
IV＝r
1，R
3＝99cm，Ψ
IV＝Ψ
2，θ
3＝45°
Wherein the scattering coefficient of control board magnesium plate is K=0.85, experimental data is as shown in figure 19: find out from above result of the test, the scattering coefficient of the Common Concrete Pavement of traditional construction technique is 0.35, and this technique dew stone road surface scattering coefficient is on average about 0.18, even less.This shows, this technique dew stone road surface be greatly improved on reflective function, but than scattering coefficient be 0.07 bituminous concrete less better.
Claims (1)
1. the construction method on new type colorful dew stone road surface, is characterized in that:
Comprise following construction sequence:
(1) treatment of road surfaces: remove the hole groove on bottom road surface, crack, pollution;
(2) sweep road surface: before sticking layer oil brushing, to construction road surface clean, dust removal process;
(3) Continuous pressing device for stereo-pattern: immediately along the outer Continuous pressing device for stereo-pattern for construction part after dust removal process, require to fit in adhesive tape and ground;
(4) brushing sticking layer oil: brush the sticking layer oil for preparing, requires that the sticking layer oil of brushing should be even, and construction road surface can fill the road surface sticking layer oil that do not have again and pile up;
(5) prepare cementitious matter: start to prepare cementitious matter after the sticking layer oil initial set that construction road surface is brushed, require to stir during preparation cementitious matter should try one's best fully, mixing time is 5 ~ 10 minutes;
(6) brushing/spray paste ramming material: after sticking layer oil parches, brushing/spray paste ramming material, cementitious matter is true qualities or colour, and thickness is 2/3 of selected building stones average grain diameter;
(7) shed building stones: the later spreading aggregate immediately of brushing adhesive ramming material, aggregate requirements uses single particle size, particle size 4 ~ 5mm, and aggregate is colored, and aggregate should cover all cementitious matters;
(8) tear-off adhesive tape: spreading aggregate 2 hours can tear-off adhesive tape in time revealing the initial set of stone road surface;
(9) reclaim aggregate: unnecessary aggregate can be regained after 6 hours by aggregate spreading after the solidification of dew stone road surface, regain after aggregate should sieve by aggregate size and continue to use, the road surface application Strongh vacuum cleaner reclaiming aggregate reclaims aggregate again.
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| CN109400055B (en) * | 2018-11-07 | 2021-07-30 | 华新水泥股份有限公司 | Exposed concrete surface hardening material and preparation method thereof |
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