CN110409245A - A kind of construction of cement concrete road surface variance control method - Google Patents
A kind of construction of cement concrete road surface variance control method Download PDFInfo
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- CN110409245A CN110409245A CN201910515031.3A CN201910515031A CN110409245A CN 110409245 A CN110409245 A CN 110409245A CN 201910515031 A CN201910515031 A CN 201910515031A CN 110409245 A CN110409245 A CN 110409245A
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- cement
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- road surface
- control method
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- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of construction of cement concrete road surface variance control methods, include the following steps: sorting: selecting good cement, coarse aggregate, day combustion sand and additive；Stirring: first putting into blender for coarse aggregate, then successively puts into natural sand and cement, additive is added while cement is added, and then adds water while stirring, obtains mixture after mixing evenly；Transport: mixture is transported to construction site；It paves: mixture is subjected to the construction that paves.Compared with prior art, the present invention controls the mutation process of concrete by the relevant parameter of each raw material of setting；During stirring, the addition order and mixing time of strict control raw material avoid concrete from generating variation while reaching good mixing effect；Meanwhile from the paving process of the selection of raw material to the end, good concrete speading effect is all finally reached effectively to control the variation of concrete by the relevant parameter that the method for science measures concrete.
Description
Technical field
The present invention relates to construction method, in particular to a kind of construction of cement concrete road surface variance control method.
Background technique
When concrete pavement construction, since concrete mixture stirs, transport, pave and the construction of vibratory compaction moulding process
Not stringent, intensity has larger difference compared under the conditions of laboratory test, and therefore, the concrete of site operation exists compared with Big mutation rate
Property.In view of this, the present inventor obtains a kind of construction of cement concrete road surface variance control method by further investigation.
Summary of the invention
The object of the present invention is to provide a kind of construction of cement concrete road surface variance control methods, can effectively control water
The variation of cement concrete pavement construction reaches good effect of mating formation.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of construction of cement concrete road surface variance control method, includes the following steps:
Sorting: good cement, coarse aggregate, day combustion sand and additive are selected；
For cement, the kind of strict control cement.Road cement preferably selects portland cement or normal silicate water
Mud, by reasonably adjusting the mineral composition of cement, available water requiremen is few, shrinks small, High anti bending strength cement.
Meanwhile the cement for preferably using rotary kiln to produce, cement, which goes out to grind when stability is examined using Lei Shi folder method, to meet the requirements.
Factory temperature, banking system and the period of storage of strict control cement are wanted, guarantees that cement is non-efflorescing cementitious or makes moist
Agglomeration.Generally require cement temperatures not higher than 35 DEG C, period of storage is no longer than 30 days.
It can be used in construction and set up aggregate cool canopy, refrigeration mechanism cold water, aggregate sprays cold water, for the high-temperature cement marched into the arena
A point storehouse isolation storage is carried out, is come into operation again after temperature is up to standard.
For the workability for guaranteeing slow setting soil, the presetting period of cement is no earlier than 1.5h, and final setting time is full earlier than 10h
When 30 DEG C of h concrete construction performance requirements of foot, jelling time can suitably shorten, but should not be earlier than 1h.
Stirring: first putting into blender for coarse aggregate, then successively puts into natural sand and cement, adds while cement is added
Enter additive, then adds water while stirring, obtain mixture after mixing evenly；
Transport: mixture is transported to construction site；
It paves: mixture is subjected to the construction that paves.
Further to improve, the alkali content in cement is less than or equal to 0.60%.
Further to improve, the coarse aggregate includes hard, durable, the clean rubble of quality, crushed gravel or cobble, described
The water absorption rate of coarse aggregate is less than or equal to 3%, and clay content is less than or equal to 1.0%, and the clay content of the natural sand is less than or equal to
3.5%.
Further to improve, the additive includes water-reducing agent and air entraining agent.
Further to improve, the additional agent content is lower than 6%.
It is further to improve, then plus water in whipping process, after natural sand and cement is added, 4s~6s is stirred, adds water mistake
Journey should be completed in 14s~16s.
Further to improve, in whipping process, total mixing time is more than or equal to 60s, adds the mixing time after the completion of water big
In equal to 35s.
Compared with prior art, a kind of construction of cement concrete road surface variance control method of the present invention, selects good water
Mud, coarse aggregate, natural sand and additive, so that the quality of cement concrete is preferable；By setting the relevant parameter of each raw material, control
The mutation process of concrete processed；During stirring, the addition order and mixing time of strict control raw material reach good
Concrete is avoided to generate variation while mixing effect；Meanwhile from the paving process of the selection of raw material to the end, all pass through section
The relevant parameter of method measurement concrete is finally reached good concrete speading effectively to control the variation of concrete
Effect.
Specific embodiment
Invention is further described in detail below.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
A kind of construction of cement concrete road surface variance control method, includes the following steps:
First, sorting: select good cement, coarse aggregate, day combustion sand and additive；
For cement, the kind of strict control cement.Road cement preferably selects portland cement or normal silicate water
Mud, by reasonably adjusting the mineral composition of cement, available water requiremen is few, shrinks small, High anti bending strength cement；Meanwhile preferably
The cement produced using rotary kiln, cement, which goes out to grind when stability is examined using Lei Shi folder method, to meet the requirements；Want strict control cement
Factory temperature, banking system and period of storage, guarantee cement it is non-efflorescing cementitious or dampness agglomeration.Generally require cement temperatures not
Higher than 35 DEG C, period of storage is no longer than 30 days；It can be used in construction and set up aggregate cool canopy, refrigeration mechanism cold water, aggregate sprays cold
Water carries out a point storehouse isolation storage for the high-temperature cement marched into the arena, comes into operation again after temperature is up to standard；For the construction for guaranteeing slow setting soil
Performance, the presetting period of cement are no earlier than 1.5h, and final setting time meets 30 DEG C of h concrete construction performance requirements earlier than 10h
When, jelling time can suitably shorten, but should not be earlier than 1h；Alkali content in cement is less than or equal to 0.60%.
For coarse aggregate, the rubble that quality should be selected hard, durable, clean, crushed gravel or cobble should integrate suction of gathering materials
The water absorption rate of the aqueous influence to concrete construction performance, intensity and durability, coarse aggregate is less than or equal to 3%；Coarse aggregate is preferably used
Classification is gathered materials, and classification number is preferably 2-3 grades, and demand of technical standard should be met by mixing the gradation with rear coarse aggregate；Should according to coarse aggregate come
Source and the condition of production judge the state containing pureed in coarse aggregate, the content of the various state clays of strict control, to meet coagulation local soil type
It is required at design control.For C60 concrete, general provision coarse aggregate clay content is less than or equal to 1.0%.
For natural sand, clay content is less than or equal to 3.5%, and natural sand preferably selects river sand, the quality of sand is hard, it is durable,
It is clean；The parent rock of production mechanism, quality is hard, clean, and density is high, and water absorption rate is low, and machine-made sand concrete workability should meet
Technique requires, and concrete water-cement ratio should meet life requirement, strict control content of stone powder, general provision under drying regime of gathering materials
Powder containing quantity is less than or equal to 2.0%.
For additive, ordinary water-reducing agent or high efficiency water reducing agent can be selected, sugar calcium class ordinary water-reducing agent or low should not be selected
Concentration type beta-naphthalenesulfonic-acid salt formaldehyde condensation products high efficiency water reducing agent, there is the occasion of reinforcing bar or transmission rod, should control in additive chlorine from
The content of son and sulfate ion, meets reinforced steel bar rust preventing requirement；It should allow to examine water-reducing agent (slow under the conditions of highest construction temperature
Solidifying agent) adaptability with cement, when adaptability is bad, the total alkali and solvable sulfate that should analyze additive and cement contain
Amount exists not in due course, Ying Gaixuan water-reducing agent (buffer) or cement；Air entraining agent, air entraining agent should not be used alone in road concrete
Preferably it is used in combination with water-reducing agent；Air entraining agent should meet good dispersion, reduce the requirement that surface tension is obvious and foam is stable；It is additional
The content of agent should control below 6%.
Second, stirring: it is various to gather materials and first moisten, so that water content is in saturated dry surface, analysis leakage of obviously not dripping
And dry tack free, it is able to maintain unit consumption of water and effective ratio of mud is stablized, keep water content uniform and stable；First coarse aggregate is thrown
Enter blender, then successively put into natural sand and cement, additive is added while cement is added, stirs 4s~6s, preferably
For 5s, then adds water while stirring, add water process that should control and completed in 14s~16s, preferably 15s, after mixing evenly
To mixture；Mixing time should be formed according to stirring blade and convection current mixing number determines, total mixing time is more than or equal to 60s,
The mixing time after the completion of water is added to be more than or equal to 35s；Meanwhile mixing time can be appropriately extended, mix diminishing according to additive type
The concrete of agent and retardation water reducing agent, mixing time extend about 20%, mix air entraining agent concrete mixing time and extend about 10%；It mixes
The concrete of flyash or ground slag, mixing time preferably extend about 30%~50% than the mixing time of normal concrete,
When double-doped with additive, mixing time ratio mixes Fresh Concrete with Admixtures and extends about 20%.
Transport: third mixture is transported to construction site；
Dump truck transport can be selected in concrete mixture, when the fresh concrete mixture slump is greater than 90mm, transport
Distance farther out when, preferably selects concrete delivery truck transport；It should determine that longest is transported according to slump-loss and the paving site slump
The defeated time, before mixture is transported to paving site, the slump is small, and the live slump should meet the requirement that paves, therefore, longest transport
Between pave with closely knit molding viscosity and controlled to meet, concrete mix is from discharging to transporting, making finish it is fair
Perhaps maximum duration is as follows:
4th, it paves: mixture is subjected to the construction that paves.
It, should loose measure control panel feed entrance point check at any time when Slipform Paving, it is ensured that controlling level, into the material position of vibration bin
Height, which should ensure that, can be wholly embedded into the horizontally disposed plug-in type vibrating stick more than grade elevation, and must not be lower than defined pine
Spread coefficient requirements；It is required according to the concrete mixture vibratory compaction of different workabilities, determines that spreading speed, paving operation are answered
Equilibrium is carried out continuously, spreading speed can according to the form below select:
As supplement, in above process, after the completion of should checking blender discharging, transport vehicle discharging and paving in mixture
Mortar surface density, the control of the analysis ratio of mud and sand coarse aggregate ratio control stability, mortar surface Density Variation index are as follows:
In formula, Ve,ρmMortar apparent density variability metrics, %；
ρm,maxThe big value of mortar apparent density measured value, kg/m3；
ρM, minThe small value of mortar apparent density measured value, kg/m3。
Mortar apparent density variability metrics reflect the variation of the road concrete ratio of mud, sand in blender discharge port mix
It starches apparent density variability and is not more than 0.8%, paving site mortar apparent density variability is not more than 1.0%.
The above-mentioned description to embodiment be for convenient for those skilled in the art understand and using the present invention, it is ripe
The personnel for knowing art technology obviously easily can make various modifications to embodiment, and General Principle described herein is answered
It uses in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, art technology
Personnel's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be in protection models of the invention
Within enclosing.
Claims (7)
1. a kind of construction of cement concrete road surface variance control method, which comprises the steps of:
Sorting: good cement, coarse aggregate, day combustion sand and additive are selected；
Stirring: first putting into blender for coarse aggregate, then successively puts into natural sand and cement, is added while cement is added outer
Add agent, then adds water while stirring, obtain mixture after mixing evenly；
Transport: mixture is transported to construction site；
It paves: mixture is subjected to the construction that paves.
2. a kind of construction of cement concrete road surface variance control method according to claim 1, which is characterized in that in cement
Alkali content is less than or equal to 0.60%.
3. a kind of construction of cement concrete road surface variance control method according to claim 1, which is characterized in that the rough set
Material includes hard, durable, clean rubble, crushed gravel or the cobble of quality, and the water absorption rate of the coarse aggregate is less than or equal to 3%, contains
Mud amount is less than or equal to 1.0%, and the clay content of the natural sand is less than or equal to 3.5%.
4. a kind of construction of cement concrete road surface variability control method according to claim 1, which is characterized in that described outer
Adding agent includes water-reducing agent and air entraining agent.
5. a kind of construction of cement concrete road surface variability control method according to claim 1, which is characterized in that described outer
Add agent content lower than 6%.
6. a kind of construction of cement concrete road surface variance control method according to claim 1, which is characterized in that whipping process
In, then plus water after natural sand and cement is added, 4s~6s is stirred, adds water process that should complete in 14s~16s.
7. a kind of construction of cement concrete road surface variance control method according to claim 6, which is characterized in that whipping process
In, total mixing time is more than or equal to 60s, and the mixing time after the completion of water is added to be more than or equal to 35s.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116188204A (en) * | 2023-03-21 | 2023-05-30 | 湖北庭凯建筑工程有限公司 | Intelligent monitoring and management system for production and transportation of building construction materials based on Internet of things |
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Cited By (2)
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| CN116188204A (en) * | 2023-03-21 | 2023-05-30 | 湖北庭凯建筑工程有限公司 | Intelligent monitoring and management system for production and transportation of building construction materials based on Internet of things |
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Application publication date: 20191105 |