CN107117893A - The method of the closely knit macrovoid pervious concrete pavement construction of plate vibration - Google Patents
The method of the closely knit macrovoid pervious concrete pavement construction of plate vibration Download PDFInfo
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- CN107117893A CN107117893A CN201710215408.4A CN201710215408A CN107117893A CN 107117893 A CN107117893 A CN 107117893A CN 201710215408 A CN201710215408 A CN 201710215408A CN 107117893 A CN107117893 A CN 107117893A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
- E01C7/142—Mixtures or their components, e.g. aggregate
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The method of the closely knit macrovoid pervious concrete pavement construction of plate vibration, is related to technical field of building construction, it is characterised in that:Comprise the following steps, prepare construction, mix-design, stirring, transport, the shaping that paves, vibrate, conserve, joint-cutting, maintenance, maintenance.The inventive method is reasonable, easy to operate, work well.
Description
Technical field
The present invention relates to technical field of building construction, and in particular to the closely knit macrovoid pervious concrete pavement of plate vibration is applied
The method of work.
Background technology
With the implementation and popularization of national sponge urban construction, many road engineering technical research mechanisms and designing unit are not
Disconnected to carry out road surface dank material research and water-permeable pavement An attempt of design, strong construction enterprises are also to this progress tradition
The innovation of construction technology, obtains a series of new results, plays a significant role in actual applications.In municipal engineering construction, with
Cement concrete with water permeability is surface layer or the pavement of sub-surface and other pavement structures are applied based on cement concrete tradition
The innovation and application of work technique, are the technological projects for putting forth effort in municipal engineering construction to study, promote.Anhui Province's Xin Lu construction projects
Co., Ltd of group undertakes the construction of Fuyang City south of a city new district Fu Kanglu, Nanjing Road and appurtenant work and started, and constitutes know-how power
Amount, carries out the research of pavement sub-surface permeable concrete material and construction technology, obtains innovative achievements and is applied to
Multiple engineering projects, there is preferable economic benefit and social benefit.
Being built with reference to modern " sponge city " needs, and patent of the present invention can be widely applied to pavement surface layer and permeable face brick
Formula pavement basis, square ground, parkway and parking lot etc., can also be used as major urban arterial highway dankness type sub-surface
Deng.
The content of the invention
The technical problems to be solved by the invention be to overcome existing technological deficiency provide a kind of method rationally, operation side
Just the method for the closely knit macrovoid pervious concrete pavement construction of plate vibration, worked well.
The technical problems to be solved by the invention are realized using following technical scheme:
The method of the closely knit macrovoid pervious concrete pavement construction of plate vibration, it is characterised in that:Comprise the following steps,
Step 1: preparing construction:
I establishes and improve construction organization mechanism, and personnel, device configuration are in place;
II is familiar with construction drawing and relevant technical data, conscientiously carries out technical annotation in construction;
III march into the arena raw material by batch detection it is qualified;
Step 2: mix-design:Pervious concrete is to be used as coarse aggregate and cement, mineral admixture, additional by rubble
The concrete with continuous pore structure and some strength that agent and water are formed after mix, hardening by a certain percentage;Reach strong
Degree is high, the concrete of good water permeability, and match ratio wants multiple optimization design;
I design considerations:1)《Water-permeable cement concrete pavement technique code》CJJ/T135-2009
2)《Highway engineering cement and cement concrete testing regulations》JTG E42-2005
3)《Highway engineering is gathered materials testing regulations》JTG E30-2005
4) construction drawing requirement;
II mix-design:Design strength is C20.In mix-design, to ensure the strength grade of pervious concrete,
From P.O42.5R class g cements, the mono- graded broken stones of particle diameter 5-10mm, the YY-I type high efficiency water reducing agents with gelling;
It is defined below by multi-scheme than choosing:
Water:Cement:Water reducer:Rubble=123:445:6.8:1720;
III analysis checking:The following form of analysis of experiments is carried out according to design mixture proportion,
Design requirement is met through analysis of experiments;
Step 3: stirring:
I according to quantities size and Design of Construction Organization requirement, using qualified forced mixer, mixer one
Determine on the ground in scope, setting prevents the splicing equipment (the board-like bucket class of such as square) of water and material spilling, environmental protection and subtract
Cleaning work after few work;Material is put into mixer respectively by with when feeding sequence during stirring;Using three feeding methods:First
Mud stir about is added water after rubble after 1 minute, it is tentatively mixed, then puts into the YY-I types high efficiency water reducing agent progress of gelling fully
Mix, mixing time 1.5 minutes, finally by the water of ormal weight, point 2-3 addition continues to stir 1.5-2 minutes;It is equal depending on stirring
Even degree, can the proper extension mechanical agitation time, but no more than 2.5 minutes.Site inspection, compound should hold agglomerating, pine
Hand vibration is bulk state;Compound will be timely used, and had isolation, air-dry and consolidated phenomenon and make waste disposal;
According to field measurement raw material water content in II construction, mix amount of water is adjusted;To ensure mix effect, moisture 2-
3 additions, it is strict to control the ratio of mud and add water the time, make into material quality and meet design requirement;Into material dry Site Detection, its
Vigorous denseness control is tieed up in 25S between 35S;
III checks into material manual site, judges whether particles of aggregates wash cement slurry wraps up uniform, no cement mortar disengaging and
Lower drop phenomenon, compound holding is agglomerating, and vibration of loosing one's grip, which dissipates, to be advisable;
Step 4: transport:Pervious concrete uses stiff mix, and initial set is fast, should not be using tank car transport.Scene can
Transported using medium and small dump truck, and formulate the measure of mixture segregation in transportation that prevents, haul distance exceeds 500 meters or gas
The temperature waterproof cloth of the application more than 15 DEG C is covered;Haulage time is short, maximum duration<Stirring during concrete initial set after m- input cement
And discharging time-blanking, pave and the roller-compaction time, it must not be stopped in transportation;
Step 5: the shaping that paves:Pervious concrete is fast because of its initial set, and paving must be timely rapidly, to ensure consolidation effect, often
Layer paving thickness 10cm-15cm, during multilayer pouring, when must not exceed bottom concrete initial set to the superiors' construction deadline
Between, find flatness accurately with floating rule, then vibrated with plate vibrator;
Step 6: vibrating:Without vibrating or tamping strongly in paving process, first struck off after discharging with floating rule, then
Gently shaken the compound after paving with plate vibrator low frequency;Without using large-tonnage high frequency rolling apparatus, concrete mistake otherwise can be made
In closely knit, cause surface bleeding to reduce effective drainage porosity, influence permeable effect, high speed vibrator can also make cement slurry from thick bone
Expect surface segregation, flow into bottom and form an impermeable stratum, material is lost water penetration;
Step 7: maintenance:Pervious concrete maintenance is link more important in work progress, is preferably taken after bedding felt-cloth
Watering maintenance, felt-cloth keeps moistening in whole curing time, three main points is noted during watering:Water spray dynamics, spraying time and
Infiltration degree;
Water spray dynamics:Water pipe can not be held high, and concrete surface must not be patted or hammered to water column, and current should be formed carefully during watering
Rain shape, to ensure that concrete surface stone is not destroyed by powerful current;
Spraying time:Should not at noon pavement temperature highest when sprayed with cold water, prevent concrete from drastically shrinking formation and splitting
Line, is preferably timed watering in daily morning and at dusk;
Infiltration degree:Aspect concrete keeps must not having current generation in moistening, structure sheaf, can take double-deck maintenance side
Method, that is, descend paving plastic film, and upper lid felt-cloth covers health of sprinkling water again, and curing time is 14 days;
Step 8: joint-cutting:Pervious concrete joint-cutting, time interval is unsuitable long, 12 hours after general 15 DEG C of makings of temperature
Left and right joint-cutting, temperature is reduced or increased, and the suitable proper extension of lancing time or postponement, design parameter are determined with field measurement, joint-cutting
When to occur without flash and obscission as standard, spacing every 5m together, seam depth 40mm, slit width 6mm, the filler cementation of fissures;
Step 9: maintenance, maintenance:
I pavement road bed should have enough strength and stabilities;
(1) when being impervious stratum, if 1% to 2% slope is towards gutter, be easy to the discharge of water, basic top surface with it is permeable
3cm blotters are set between concrete layer, to ensure pervious concrete making quality;
(2) when intensity higher water penetration gravel soil property is in basis, longitudinal drainage ditch can not be set, road surface water directly penetrates into ground
Pervious concrete layer construction can be carried out after lower recharge of groundwater, basic top surface grinding compacting and leveling;
II grading of aggregates meets design requirement, and its crush values, clay content and elongated particles should be detected before marching into the arena.Crush values
With elongated particles are exceeded will directly affect pervious concrete intensity, clay content is excessive also to influence pervious concrete permeability rate;
III strict control feeding sequence;
Preferably covered in IV transport with waterproof cloth, prevent moisture loss and pellet from tumbling, the time should be controlled within 20 minutes;
V is not more than vibration force coverage, general single berth using the compacting of Small-scale Flat vibrator, a paving thickness
Thickness is not more than 15cm;
VI maintenance process can not be accumulation of heat protection, prevent current to scatter and disappear, take saturating directly with felt-cloth covering watering maintenance
After water coagulation soil surface is integrally covered with film, then in the method for film surface laying geotextiles, then maintenance of sprinkling water, structure sheaf
Interior to keep moist, curing time is 14 days;
VII maintenance expires, and core detection its intensity, scene carry out water penetration detection;
Filler in the step 8 is 851 polyurethane.
Beneficial effects of the present invention are:1. dry plate vibration air-free concrete is used, construction technology is simple, and input is set
Standby few, construction quality is preferably controlled.
2. identical with normal concrete production technology, coarse aggregate matches somebody with somebody particulate formula rubble, bill of material one, sorting side using single-stage
Just, procedure quality is preferably controlled.
3. maintenance can be covered or be atomized after decking and rolling shaping, speed of application is fast, efficiency high.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, enter below
One step illustrates the present invention.
The method of the closely knit macrovoid pervious concrete pavement construction of plate vibration, it is characterised in that:Comprise the following steps,
Step 1: preparing construction:
I establishes and improve construction organization mechanism, and personnel, device configuration are in place;
II is familiar with construction drawing and relevant technical data, conscientiously carries out technical annotation in construction;
III march into the arena raw material by batch detection it is qualified;
Step 2: mix-design:Pervious concrete is to be used as coarse aggregate and cement, mineral admixture, additional by rubble
The concrete with continuous pore structure and some strength that agent and water are formed after mix, hardening by a certain percentage;Reach strong
Degree is high, the concrete of good water permeability, and match ratio wants multiple optimization design;
I design considerations:1)《Water-permeable cement concrete pavement technique code》CJJ/T135-2009
2)《Highway engineering cement and cement concrete testing regulations》JTG E42-2005
3)《Highway engineering is gathered materials testing regulations》JTG E30-2005
4) construction drawing requirement;
II mix-design:Design strength is C20.In mix-design, to ensure the strength grade of pervious concrete,
From P.O42.5R class g cements, the mono- graded broken stones of particle diameter 5-10mm, the YY-I type high efficiency water reducing agents with gelling;
It is defined below by multi-scheme than choosing:
Water:Cement:Water reducer:Rubble=123:445:6.8:1720;
III analysis checking:The following form of analysis of experiments is carried out according to design mixture proportion,
Design requirement is met through analysis of experiments;
Step 3: stirring:
I according to quantities size and Design of Construction Organization requirement, using qualified forced mixer, mixer one
Determine on the ground in scope, setting prevents the splicing equipment (the board-like bucket class of such as square) of water and material spilling, environmental protection and subtract
Cleaning work after few work;Material is put into mixer respectively by with when feeding sequence during stirring;Using three feeding methods:First
Mud stir about is added water after rubble after 1 minute, it is tentatively mixed, then puts into the YY-I types high efficiency water reducing agent progress of gelling fully
Mix, mixing time 1.5 minutes, finally by the water of ormal weight, point 2-3 addition continues to stir 1.5-2 minutes;It is equal depending on stirring
Even degree, can the proper extension mechanical agitation time, but no more than 2.5 minutes.Site inspection, compound should hold agglomerating, pine
Hand vibration is bulk state;Compound will be timely used, and had isolation, air-dry and consolidated phenomenon and make waste disposal;
According to field measurement raw material water content in II construction, mix amount of water is adjusted;To ensure mix effect, moisture 2-
3 additions, it is strict to control the ratio of mud and add water the time, make into material quality and meet design requirement;Into material dry Site Detection, its
Vigorous denseness control is tieed up in 25S between 35S;
III checks into material manual site, judges whether particles of aggregates wash cement slurry wraps up uniform, no cement mortar disengaging and
Lower drop phenomenon, compound holding is agglomerating, and vibration of loosing one's grip, which dissipates, to be advisable;
Step 4: transport:Pervious concrete uses stiff mix, and initial set is fast, should not be using tank car transport.Scene can
Transported using medium and small dump truck, and formulate the measure of mixture segregation in transportation that prevents, haul distance exceeds 500 meters or gas
The temperature waterproof cloth of the application more than 15 DEG C is covered;Haulage time is short, maximum duration<Stirring during concrete initial set after m- input cement
And discharging time-blanking, pave and the roller-compaction time, it must not be stopped in transportation;
Step 5: the shaping that paves:Pervious concrete is fast because of its initial set, and paving must be timely rapidly, to ensure consolidation effect, often
Layer paving thickness 10cm-15cm, during multilayer pouring, when must not exceed bottom concrete initial set to the superiors' construction deadline
Between, find flatness accurately with floating rule, then vibrated with plate vibrator;
Step 6: vibrating:Without vibrating or tamping strongly in paving process, first struck off after discharging with floating rule, then
Gently shaken the compound after paving with plate vibrator low frequency;Without using large-tonnage high frequency rolling apparatus, concrete mistake otherwise can be made
In closely knit, cause surface bleeding to reduce effective drainage porosity, influence permeable effect, high speed vibrator can also make cement slurry from thick bone
Expect surface segregation, flow into bottom and form an impermeable stratum, material is lost water penetration;
Step 7: maintenance:Pervious concrete maintenance is link more important in work progress, is preferably taken after bedding felt-cloth
Watering maintenance, felt-cloth keeps moistening in whole curing time, three main points is noted during watering:Water spray dynamics, spraying time and
Infiltration degree;
Water spray dynamics:Water pipe can not be held high, and concrete surface must not be patted or hammered to water column, and current should be formed carefully during watering
Rain shape, to ensure that concrete surface stone is not destroyed by powerful current;
Spraying time:Should not at noon pavement temperature highest when sprayed with cold water, prevent concrete from drastically shrinking formation and splitting
Line, is preferably timed watering in daily morning and at dusk;
Infiltration degree:Aspect concrete keeps must not having current generation in moistening, structure sheaf, can take double-deck maintenance side
Method, that is, descend paving plastic film, and upper lid felt-cloth covers health of sprinkling water again, and curing time is 14 days;
Step 8: joint-cutting:Pervious concrete joint-cutting, time interval is unsuitable long, 12 hours after general 15 DEG C of makings of temperature
Left and right joint-cutting, temperature is reduced or increased, and the suitable proper extension of lancing time or postponement, design parameter are determined with field measurement, joint-cutting
When to occur without flash and obscission as standard, spacing every 5m together, seam depth 40mm, slit width 6mm, the filler cementation of fissures;
Step 9: maintenance, maintenance:
I pavement road bed should have enough strength and stabilities;
(2) when being impervious stratum, if 1% to 2% slope is towards gutter, be easy to the discharge of water, basic top surface with it is permeable
3cm blotters are set between concrete layer, to ensure pervious concrete making quality;
(2) when intensity higher water penetration gravel soil property is in basis, longitudinal drainage ditch can not be set, road surface water directly penetrates into ground
Pervious concrete layer construction can be carried out after lower recharge of groundwater, basic top surface grinding compacting and leveling;
II grading of aggregates meets design requirement, and its crush values, clay content and elongated particles should be detected before marching into the arena.Crush values
With elongated particles are exceeded will directly affect pervious concrete intensity, clay content is excessive also to influence pervious concrete permeability rate;
III strict control feeding sequence;
Preferably covered in IV transport with waterproof cloth, prevent moisture loss and pellet from tumbling, the time should be controlled within 20 minutes;
V is not more than vibration force coverage, general single berth using the compacting of Small-scale Flat vibrator, a paving thickness
Thickness is not more than 15cm;
VI maintenance process can not be accumulation of heat protection, prevent current to scatter and disappear, take saturating directly with felt-cloth covering watering maintenance
After water coagulation soil surface is integrally covered with film, then in the method for film surface laying geotextiles, then maintenance of sprinkling water, structure sheaf
Interior to keep moist, curing time is 14 days;
VII maintenance expires, and core detection its intensity, scene carry out water penetration detection;
Filler in the step 8 is 851 polyurethane.
The material and equipment used:
Material:
Pervious concrete is similar to cement concrete construction, and no fine granules match somebody with somebody single-stage particle diameter 5mm-10mm high intensity
Rubble mixes synthesis material as aggregate, incorporation cement and high performance additive;
Cement:Portland cement is preferably used, strength grade is not less than 42.5, and quality should meet existing national standards
《Common portland cement》GB175 requirement;
Additive:Using preferable YY-I types high efficiency water reducing agent (liquid) (the technical requirements reference of gelatinization results《Outside concrete
Plus agent》GB8076-2008) manufacturer be Hefei Yong Yuan building materials Co., Ltd;
Specific Testing index see the table below:
Rubble:It is required that quality is hard, clean, meet cement concrete construction code requirement, particle diameter is 5mm-10mm, pin
The poor pellet of sheet, specification see the table below:
Water:City domestic water;
Equipment:
Equipment such as following table need to be equipped with:
Establish Safety assurance measures:
Safety in production organization is set up, every production safety management system is established and improve, strengthens safety inspection and carries out
Safety inspection is recorded, and every safety measure is fulfilled;
Carry out security incident response and Rescue Plan, it is ensured that fund input needed for safety in production;
Every safety regulation for operations is strictly observed, special equipment operating personnel is accomplished to take appointment with certificate;
The dangerous position such as job site gateway, along the line intersection, temporary electricity will set up safety protection facility, set bright
Aobvious safety signses;
It is determined that environmentally friendly safeguard measure:
In residential block construction, night transport vehicle must not blow a whistle, be disturbed residents with reducing noise, it is ensured that construction noise meets《Building
Construction site noise limit is put》(GB12523) require, 62 decibels are not more than between daytime, night is not more than 55 decibels;
Mixer surrounding sets sedimentation basin, gutter, and waste water is discharged after precipitation, and stirring personnel will wear protective mask;
To prevent concrete pickup construction site, the certain limit of mixer bottom need to use protective plate fortification measure;
When stirring slurry, stirring canopy is set, to prevent dust pollution;
Fine environment is created, building site Office Area, living area clean hygiene, daily personnel assigned are cleaned;
Building waste and house refuse clear up outward transport at any time, are stacked by appointed place.After the completion of construction, place is flattened, is done
Clear, live net to the complete material of work, after construction completion, surplus material will be withdrawn in time;
Work responsibility system is established and improve, civilized construction responsibility is fulfilled.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (2)
1. the method for the closely knit macrovoid pervious concrete pavement construction of plate vibration, it is characterised in that:Comprise the following steps,
Step 1: preparing construction:
I establishes and improve construction organization mechanism, and personnel, device configuration are in place;
II is familiar with construction drawing and relevant technical data, conscientiously carries out technical annotation in construction;
III march into the arena raw material by batch detection it is qualified;
Step 2: mix-design:Pervious concrete be by rubble as coarse aggregate and cement, mineral admixture, additive and
The concrete with continuous pore structure and some strength that water is formed after mix, hardening by a certain percentage;Reach intensity it is high,
The concrete of good water permeability, match ratio wants multiple optimization design;
I design considerations:1)《Water-permeable cement concrete pavement technique code》CJJ/T135-2009
2)《Highway engineering cement and cement concrete testing regulations》JTG E42-2005
3)《Highway engineering is gathered materials testing regulations》JTG E30-2005
4) construction drawing requirement;
II mix-design:Design strength is C20.In mix-design, to ensure the strength grade of pervious concrete, select
P.O42.5R class g cements, the mono- graded broken stones of particle diameter 5-10mm, the YY-I type high efficiency water reducing agents with gelling;
It is defined below by multi-scheme than choosing:
Water:Cement:Water reducer:Rubble=123:445:6.8:1720;
III is carried out after analysis checking, it is ensured that meet design requirement;
Step 3: stirring:
I according to quantities size and Design of Construction Organization requirement, using qualified forced mixer, the certain model of mixer
On ground in enclosing, setting prevents the splicing equipment (the board-like bucket class of such as square) of water and material spilling, environmental protection and reduction work
Cleaning work afterwards;Material is put into mixer respectively by with when feeding sequence during stirring;Using three feeding methods:First rubble
After add water mud stir about after 1 minute, make it tentatively mix, then put into the YY-I type high efficiency water reducing agents of gelling fully to be mixed
Close, mixing time 1.5 minutes, finally by the water of ormal weight, point 2-3 addition continues to stir 1.5-2 minutes;Depending on stirring
Degree, can the proper extension mechanical agitation time, but no more than 2.5 minutes.Site inspection, compound should be held agglomerating, loose one's grip
Vibration is bulk state;Compound will be timely used, and had isolation, air-dry and consolidated phenomenon and make waste disposal;
According to field measurement raw material water content in II construction, mix amount of water is adjusted;To ensure mix effect, moisture 2-3 times
Add, it is strict to control the ratio of mud and add water the time, make into material quality and meet design requirement;Into material dry Site Detection, it is tieed up
Vigorous denseness control is in 25S between 35S;
III checks into material manual site, judges whether particles of aggregates wash cement slurry wraps up uniform, and no cement mortar departs from and lower drop
Phenomenon, compound holding is agglomerating, and vibration of loosing one's grip, which dissipates, to be advisable;
Step 4: transport:Pervious concrete uses stiff mix, and initial set is fast, should not be using tank car transport.Scene can be used
Medium and small dump truck transport, and the measure of mixture segregation in transportation that prevents is formulated, haul distance is super beyond 500 meters or temperature
15 DEG C of application waterproof cloth are crossed to cover;Haulage time is short, maximum duration<During concrete initial set it is m- input cement after stirring and go out
M- blanking during material, pave and the roller-compaction time, must not be stopped in transportation;
Step 5: the shaping that paves:Pervious concrete is fast because of its initial set, and paving must be timely rapidly, to ensure consolidation effect, every layer of stand
Thickness 10cm-15cm is spread, during multilayer pouring, the bottom concrete initial set time must not be exceeded to the superiors' construction deadline,
Find flatness accurately with floating rule, then vibrated with plate vibrator;
Step 6: vibrating:Without vibrating or tamping strongly in paving process, first struck off after discharging with floating rule, then with flat
Deck vibrator low frequency gently shakes the compound after paving;Without using large-tonnage high frequency rolling apparatus, otherwise concrete can be made excessively close
It is real, cause surface bleeding to reduce effective drainage porosity, influence permeable effect, high speed vibrator can also make cement slurry from coarse aggregate table
Face is isolated, and is flowed into bottom and is formed an impermeable stratum, material is lost water penetration;
Step 7: maintenance:Pervious concrete maintenance is link more important in work progress, preferably takes and is sprinkled water after bedding felt-cloth
Maintenance, felt-cloth keeps moistening in whole curing time, and three main points are noted during watering:Water spray dynamics, spraying time and infiltration
Degree;
Water spray dynamics:Water pipe can not be held high, and concrete surface must not be patted or hammered to water column, and current should form drizzle during watering
Shape, to ensure that concrete surface stone is not destroyed by powerful current;
Spraying time:Should not at noon pavement temperature highest when sprayed with cold water, prevent concrete from drastically shrinking to form crackle, preferably
Watering is timed in daily morning and dusk;
Infiltration degree:Aspect concrete keeps must not having current generation in moistening, structure sheaf, can take double-deck maintenance process, i.e.,
Lower paving plastic film, upper lid felt-cloth covers health of sprinkling water again, and curing time is 14 days;
Step 8: joint-cutting:Pervious concrete joint-cutting, time interval is unsuitable long, 12 hours or so after general 15 DEG C of makings of temperature
Joint-cutting, temperature reduction or increases, the suitable proper extension of lancing time or postponement, and design parameter is determined with field measurement, during joint-cutting with
It is standard to occur without flash and obscission, and spacing together, stitches depth 40mm, slit width 6mm, the filler cementation of fissures every 5m;
Step 9: maintenance, maintenance:
I pavement road bed should have enough strength and stabilities;
(1) when being impervious stratum, if 1% to 2% slope is towards gutter, it is easy to the discharge of water, basic top surface and permeable coagulation
3cm blotters are set between soil layer, to ensure pervious concrete making quality;
(2) when intensity higher water penetration gravel soil property is in basis, longitudinal drainage ditch can not be set, road surface water directly permeates the ground benefit
Underground water is filled, pervious concrete layer construction can be carried out after basic top surface grinding compacting and leveling;
II grading of aggregates meets design requirement, and its crush values, clay content and elongated particles should be detected before marching into the arena.Crush values and pin
Sheet content overproof will directly affect pervious concrete intensity, and clay content is excessive also to influence pervious concrete permeability rate;
III strict control feeding sequence;
Preferably covered in IV transport with waterproof cloth, prevent moisture loss and pellet from tumbling, the time should be controlled within 20 minutes;
V using the compacting of Small-scale Flat vibrator, and a paving thickness is not more than vibration force coverage, and general single berth is thick not
More than 15cm;
VI maintenance process can not be accumulation of heat protection, prevent current to scatter and disappear, take permeable mixed directly with felt-cloth covering watering maintenance
After solidifying soil surface is integrally covered with film, then protected in the method for film surface laying geotextiles, then maintenance of sprinkling water, structure sheaf
Humidity is held, curing time is 14 days;
VII maintenance expires, and core detection its intensity, scene carry out water penetration detection.
2. the method for the closely knit macrovoid pervious concrete pavement construction of plate vibration according to claim 1, its feature exists
In:Filler in the step 8 is 851 polyurethane.
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