CN110714382B - Road base construction method for cement stabilized macadam mixture in high-temperature season - Google Patents
Road base construction method for cement stabilized macadam mixture in high-temperature season Download PDFInfo
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- CN110714382B CN110714382B CN201910983736.8A CN201910983736A CN110714382B CN 110714382 B CN110714382 B CN 110714382B CN 201910983736 A CN201910983736 A CN 201910983736A CN 110714382 B CN110714382 B CN 110714382B
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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
- E01C3/00—Foundations for pavings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
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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
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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
- 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
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Abstract
A road base construction method for cement stabilized macadam mixture in high-temperature seasons comprises the steps of mixing cement, sucrose solution, stabilized macadam coarse aggregate and fine aggregate. The invention blends sucrose into the cement stabilized macadam mixing water, can delay the hydration reaction of cement, realize the retardation effect of non-retardation cement, and ensure that the cement stabilized macadam mixture has sufficient construction delay time, and the construction delay time can be flexibly adjusted according to the mixing amount, so that the cement stabilized macadam mixture also has sufficient construction time under the condition of using common cement in hot summer, thereby ensuring the engineering quality.
Description
Technical Field
The invention belongs to road engineering, and particularly relates to a pavement base construction method.
Background
In road engineering construction, cement stabilized macadam is a relatively common material structure as a base layer and is widely applied in various places. However, as the productivity of the cement industry is adjusted, the special slow-setting cement for roads is not produced in many areas due to the small application range, so that the cement for the conventional building structure has to be used for road base construction in some areas, the setting time of the cement is short and is generally 1.5-2 hours, the requirement of the delay time of the road base construction, which is generally 2-3 hours, cannot be met, and the construction quality of the base is affected.
Because of the time limit for a project, road basic unit is under construction inevitable in high temperature season, and under the high temperature season, the effective engineering time of rubble can be more short-lived in the cement stabilization, even use slow setting cement, in the higher summer of temperature, the initial set time of cement also can shorten by a wide margin, if the mixture continues to pave after the cement initial set and rolls the construction, the compactness and the intensity of basic unit can reduce by a wide margin, can not satisfy the quality requirement.
Disclosure of Invention
The invention aims to provide a method for constructing a road base in a high-temperature season by using a cement stabilized macadam mixture, which aims to solve the problem that the effective construction time of the cement stabilized macadam mixture is not enough in the high-temperature season and under the condition of using common non-retarded cement.
In order to achieve the purpose, the invention adopts the following technical scheme:
a cement stabilized macadam mixture comprises cement, a sucrose solution, stabilized macadam coarse aggregate and fine aggregate,
the weight ratio of the components is as follows:
cement: 3% -5%;
stabilized macadam coarse aggregate: 60% -65%;
fine aggregate: 35% -40%;
the rest is sucrose solution.
A method for constructing a road base course in a high-temperature season by using a cement stabilized macadam mixture comprises the following construction steps:
step one, designing the mixing proportion of the cement stabilized macadam mixture:
adjusting according to the field sampling screening result, wherein:
the grading of the aggregate is close to an aggregate grading curve designed by indoor mixing proportion, and the deviation range of the sieve pores is controlled within +/-3 percent;
determining the quality of cement, the quality of water and the mixing amount of sucrose in the water through tests according to the temperature of site construction; wherein the water quality is the water adding amount when the cement stabilized macadam mixture reaches the optimal water content;
step two, metering and calibrating the mixer, and calibrating a cement weighing meter, an aggregate weighing meter and a water flow metering of the mixer; on the basis of metering calibration, checking the weighing equipment every month of construction;
step three, mixing and processing the cement stabilized macadam mixture:
the cement-stabilized macadam mixture is operated by a water-stabilized mixing and supplying system, the water-stabilized mixing and supplying system comprises a reservoir, a first high-concentration sucrose solution tank, a second high-concentration sucrose solution tank, a first diluted sucrose solution tank, a second diluted sucrose solution tank and a water-stabilized mixer, all the containers are connected through pipelines, and the pipelines are connected with a control water valve and a water pump;
fully dissolving sucrose in a dual concentration difference solution tank in a water-stable mixing and supplying system to form a sucrose solution with a fixed concentration, ensuring the uniform concentration of the solution, and then inputting the sucrose solution into a water-stable mixer to mix cement and aggregate to form a cement-stable crushed stone mixture;
conveying the cement stabilized macadam mixture into a transport vehicle after production, and then covering the transport vehicle; the covering adopts a canvas tent;
paving and rolling the cement stabilized macadam mixture on the roadbed;
and step six, curing the cement stabilized macadam mixture to form a road base.
In the third step, the raw material of the water stabilization mixing and supplying system enters the reservoir after entering the factory for detection, the reservoir is connected with a water supply pump with other pipelines, the reservoir is communicated with the first high-concentration sucrose solution tank, the second high-concentration sucrose solution tank, the liquid inlets of the first dilution sucrose solution tank and the second dilution sucrose solution tank are respectively communicated, the liquid outlets of the first high-concentration sucrose solution tank and the second high-concentration sucrose solution tank are respectively communicated with the liquid inlet of the first dilution sucrose solution tank, the liquid outlets of the first high-concentration sucrose solution tank and the second high-concentration sucrose solution tank are respectively communicated with the liquid inlet of the second dilution sucrose solution tank, and the liquid outlets of the first dilution sucrose solution tank and the second dilution sucrose solution tank are respectively communicated with the liquid inlet of the water stabilization mixer.
And water quantity observation tubes are respectively installed on the first diluted sucrose solution tank and the second diluted sucrose solution tank, and inlet and outlet pipelines of the first high-concentration sucrose solution tank, the second high-concentration sucrose solution tank, the first diluted sucrose solution tank and the second diluted sucrose solution tank are respectively connected with a control water valve.
Circulating water pumps are additionally arranged in the first high-concentration sucrose solution tank and the second high-concentration sucrose solution tank, and the circulating water pumps of the tanks need to be started 5 minutes in advance before each use, so that the uniformity of the solution is ensured.
In the sixth step, in the step III,
the health preserving adopts a covering health preserving film;
when the temperature is above 30 ℃, the health preserving film is a transparent plastic film;
when the temperature is below 30 ℃, the health preserving film is a black plastic film;
the health preserving film in the rainy area is a permeable geotextile.
In the fifth step, the process is carried out,
before paving the cement stabilized macadam mixture, firstly spraying cement paste, wherein the using amount of the cement is not less than 3 kilograms per square meter, the ground is wetted by the cement paste, and the spraying length is not more than 30 meters in front of a paver;
the first layer of stable water is paved by adopting a steel wire mode to control the paving elevation; and the second layer is controlled in a steel wire walking mode or a sliding shoe walking mode.
In the fifth step, the process is carried out,
when the temperature is lower than 25 ℃, rolling in sections;
when the temperature is between 25 and 30 ℃, the length of the sectional rolling is shortened;
when the temperature is above 30 ℃, fuzzy rolling is adopted: the primary compaction roller is tightly rolled with the paver, and the turn-back length is shortened to 20 meters; one additional re-pressing roller is added, and re-pressing is completed after the echelon is followed. And when the temperature is higher than 25 ℃ in sunny days, in windy days, a small amount of water is sprayed to the tire of the final compaction roller, so that the rolling surface is wet.
In the fifth step, the rammer of the paver needs to be adjusted during paving of each layer, the initial compaction degree of each layer after paving is ensured to be not lower than 85%, the buried screw is ensured to be not less than two thirds through the adjustment of the level indicator, the screw distance from the ground is moderate, the secondary stirring uniformity of the mixture is ensured, and the rubber baffle plate for preventing particles from rolling down is installed on the lower portion of the stirring cage striker plate of the paver.
In the first step, the mass ratio of the cement components is 5%, and the optimal water content is 5%;
in the third step, the first high-concentration sucrose solution tank and the second high-concentration sucrose solution tank are both plastic tanks with the volume of 1.5m and the first diluted sucrose solution tank and the second diluted sucrose solution tank are both iron tanks with the volume of 20m for thin-wall cultivation,
before construction, 1.5 tons of high-concentration sucrose solutions with mass concentration of 4% are respectively prepared in a first high-concentration sucrose solution tank and a second high-concentration sucrose solution tank;
then, 100 kg of high-concentration sucrose solution is respectively injected into the first diluted sucrose solution tank and the second diluted sucrose solution tank from the first high-concentration sucrose solution tank, and then clear water is injected into the first diluted sucrose solution tank and the second diluted sucrose solution tank to be full, so that diluted sucrose solution with the mass concentration of 0.02% is formed;
putting a cement stabilized macadam mixture into a water-stabilized mixer, closing a first diluted sucrose solution tank when the diluted sucrose solution of the first diluted sucrose solution tank is used for the remaining 5 tons, and opening a second diluted sucrose solution tank for use; then, 50 kg of the high-concentration sucrose solution is injected into the first diluted sucrose solution tank from the first high-concentration sucrose solution tank, and 10 tons of clear water is injected into the first diluted sucrose solution tank at the same time; after the second diluted sucrose solution tank is used for the remaining 5 tons, the second diluted sucrose solution tank is closed, the first diluted sucrose solution tank is opened for use, 50 kilograms of sugar water are injected, and at the same time, 10 tons of clean water are injected; then circulating in sequence; and when the high-concentration sucrose solution in the first high-concentration sucrose solution tank is used up, the second high-concentration sucrose solution tank is used.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
according to the invention, sucrose is blended into the cement-stabilized macadam mixed water, so that the hydration reaction of cement can be delayed, the retarding effect of non-retarding cement is realized, the cement-stabilized macadam mixed material has sufficient construction delay time, and the construction delay time can be flexibly adjusted according to the mixing amount, so that the cement-stabilized macadam mixed material also has sufficient construction time under the condition of using common cement in hot summer, and the engineering quality is ensured.
The principle of the invention is that sucrose is blended into cement stabilized macadam mixing water, and the sucrose is utilized to inhibit hydration of C3A (tricalcium aluminate) and C3S (tricalcium silicate) in cement and water, so that the exothermic peak of hydration of the cement is delayed, the early hydration heat of the cement can be reduced, and the water stabilization and condensation time is delayed, thereby ensuring that the mixture has sufficient mixing, transportation, paving and rolling time before condensation. Sucrose is one of retarders for cement concrete, so that the sucrose has no negative influence on the strength of the water-stable macadam under the appropriate mixing amount. The water-stable gravel is a common retarder when the mixing amount is low, can be used as a high-temperature retarder when the mixing amount is large, is suitable for construction under different high-temperature environments, and ensures that the water-stable gravel has sufficient construction time, thereby ensuring the construction quality.
The construction method provided by the invention is provided with the water-stable mixing and supplying system, and adopts a system for double dilution of the sucrose, so that the sucrose solution is mixed more uniformly, the uniformity of the cement-stable crushed stone mixture is ensured, and the delayed water-stable setting time is ensured. The invention has convenient operation and easy mastering; the investment cost is low, and the economic benefit is better; the flexibility is good, and the application range is wide; convenient to use local materials nearby, benefit local.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a water-stable mixing and feeding system of the invention.
Reference numerals: 1-a reservoir, 2-a first high-concentration sucrose solution tank, 3-a second high-concentration sucrose solution tank, 4-a first diluted sucrose solution tank, 5-a second diluted sucrose solution tank, 6-a water stable mixer, 7-a pipeline, 8-a control water valve and 9-a water pump.
Detailed Description
The examples are as follows:
a cement stabilized macadam mixture comprises cement, a sucrose solution, stabilized macadam coarse aggregate and fine aggregate,
the weight ratio of the components is as follows:
cement: 3% -5%;
stabilized macadam coarse aggregate: 60% -65%;
fine aggregate: 35% -40%;
the rest is sucrose solution.
The method for constructing the road base in the high-temperature season by using the cement stabilized macadam mixture comprises the following construction steps:
step one, designing the mixing proportion of the cement stabilized macadam mixture:
adjusting according to the field sampling screening result, wherein:
the grading of the aggregate is close to an aggregate grading curve designed by indoor mixing proportion, and the deviation range of the sieve pores is controlled within +/-3 percent;
determining the quality of cement, the quality of water and the mixing amount of sucrose in the water through tests according to the temperature of site construction; wherein the water quality is the water adding amount when the cement stabilized macadam mixture reaches the optimal water content;
step two, metering and calibrating the mixer, and calibrating a cement weighing meter, an aggregate weighing meter and a water flow metering of the mixer; on the basis of metering calibration, checking the weighing equipment every month of construction;
step three, mixing and processing the cement stabilized macadam mixture:
the cement-stabilized macadam mixture is operated by a water-stabilized mixing and supplying system, the water-stabilized mixing and supplying system comprises a reservoir, a first high-concentration sucrose solution tank, a second high-concentration sucrose solution tank, a first diluted sucrose solution tank, a second diluted sucrose solution tank and a water-stabilized mixer, all the containers are connected through pipelines, and the pipelines are connected with a control water valve and a water pump; the device comprises a first dilution sucrose solution tank, a second dilution sucrose solution tank, a water quantity observation pipe, a control water valve and a control water valve, wherein the first dilution sucrose solution tank and the second dilution sucrose solution tank are respectively provided with the water quantity observation pipes, and the inlet and outlet pipelines of the first high-concentration sucrose solution tank, the second high-concentration sucrose solution tank, the first dilution sucrose solution tank and the second dilution sucrose solution tank are respectively connected with the control water valve.
In the third step, the raw material of the water stabilization mixing and supplying system enters the reservoir after entering the factory for detection, the reservoir is connected with a water supply pump with other pipelines, the reservoir is communicated with the first high-concentration sucrose solution tank, the second high-concentration sucrose solution tank, the liquid inlets of the first dilution sucrose solution tank and the second dilution sucrose solution tank are respectively communicated, the liquid outlets of the first high-concentration sucrose solution tank and the second high-concentration sucrose solution tank are respectively communicated with the liquid inlet of the first dilution sucrose solution tank, the liquid outlets of the first high-concentration sucrose solution tank and the second high-concentration sucrose solution tank are respectively communicated with the liquid inlet of the second dilution sucrose solution tank, and the liquid outlets of the first dilution sucrose solution tank and the second dilution sucrose solution tank are respectively communicated with the liquid inlet of the water stabilization mixer. Circulating water pumps are additionally arranged in the first high-concentration sucrose solution tank and the second high-concentration sucrose solution tank, and the circulating water pumps of the tanks need to be started 5 minutes in advance before each use, so that the uniformity of the solution is ensured.
And (3) fully dissolving the sucrose in a dual concentration difference solution tank in the water-stable mixing and supplying system to form a sucrose solution with a fixed concentration, ensuring the uniform concentration of the solution, and then inputting the sucrose solution into a water-stable mixer to mix cement and aggregate to form a cement-stable crushed stone mixture.
In the embodiment, the mass ratio of the cement components is 5%, and the optimal water content is 5%; the first high-concentration sucrose solution tank and the second high-concentration sucrose solution tank are both plastic tanks with a volume of 1.5m and are both iron tanks for carrying out thin-film fruit thinning by 20 m. 1.5 tons of high-concentration sucrose solutions with mass concentration of 4% are respectively prepared in a first high-concentration sucrose solution tank and a second high-concentration sucrose solution tank before construction. Then, 100 kg of high-concentration sucrose solution is respectively injected into the first diluted sucrose solution tank and the second diluted sucrose solution tank from the first high-concentration sucrose solution tank, and then clear water is injected into the first diluted sucrose solution tank and the second diluted sucrose solution tank to the full, so that the diluted sucrose solution with the mass concentration of 0.02% is formed.
Putting a cement stabilized macadam mixture into a water-stabilized mixer, closing a first diluted sucrose solution tank when the diluted sucrose solution of the first diluted sucrose solution tank is used for the remaining 5 tons, and opening a second diluted sucrose solution tank for use; then, 50 kg of the high-concentration sucrose solution is injected into the first diluted sucrose solution tank from the first high-concentration sucrose solution tank, and 10 tons of clear water is injected into the first diluted sucrose solution tank at the same time; after the second diluted sucrose solution tank is used for the remaining 5 tons, the second diluted sucrose solution tank is closed, the first diluted sucrose solution tank is opened for use, 50 kilograms of sugar water are injected, and at the same time, 10 tons of clean water are injected; then circulating in sequence; and when the high-concentration sucrose solution in the first high-concentration sucrose solution tank is used up, the second high-concentration sucrose solution tank is used.
Conveying the cement stabilized macadam mixture into a transport vehicle after production, and then covering the transport vehicle; the covering adopts a canvas tent; the work of rain prevention, wind prevention and sun protection is well done. The aggregate is prevented from segregation by moving for a plurality of times in the order of front and back during loading.
And fifthly, paving and rolling the cement stabilized macadam mixture on the roadbed.
Preparation before paving: and checking the information such as the water stability quantity and the departure time after the transport vehicle arrives at the field. The carrier vehicle moves back to the front of the paving to fold the waterproof cloth, and the waterproof cloth is prohibited to be folded too early; and (3) stopping and unloading the rear wheel of the transport vehicle to a position about 10 cm before the paver, pushing the transport vehicle to advance by the paver, and strictly prohibiting the transport vehicle from colliding with the paver.
Before paving the cement stabilized macadam mixture, firstly spraying cement paste, wherein the using amount of the cement is not less than 3 kilograms per square meter, the ground is wetted by the cement paste, and the spraying length is not more than 30 meters in front of a paver.
Paving a first layer: the water-stable first layer is measured and set off according to the design position, and the two side parts are provided with templates according to the design width. When the bridge, the tunnel and the culvert are encountered, the control points of the bridge, the tunnel and the culvert are required to be followed the slope, and the length of the followed slope is required to be determined according to the magnitude of the elevation difference, so that smooth transition is ensured. The first layer of stable water is paved by controlling the paving elevation in a steel wire walking mode.
Paving more than a second layer: after the water is stabilized on the second layer, the paving elevation is controlled by selecting a steel wire walking mode or a sliding shoe walking mode. The screed of the paver is reasonably adjusted according to whether a road arch exists or not and the degree of the road arch.
Selecting a rolling forming mode:
water is saved in high-temperature seasons for stable construction, rolling is completed as soon as water is stable, and the influence on strength is small.
When the temperature is lower than 25 ℃, rolling in sections;
when the temperature is between 25 and 30 ℃, the length of the sectional rolling is shortened;
when the temperature is above 30 ℃, fuzzy rolling is adopted: the primary compaction roller is tightly rolled with the paver, and the turn-back length is shortened to 20 meters; one additional re-pressing roller is added, and re-pressing is completed after the echelon is followed. And when the temperature is higher than 25 ℃ in sunny days, in windy days, a small amount of water is sprayed to the tire of the final compaction roller, so that the rolling surface is wet.
The specific rolling lengths are as follows: the following table shows the relationship between the weather conditions and the rolling mode and the rolling length of the road roller. The rolled length is in meters.
The rolling forming steps are as follows:
the rolling speed of the vibratory roller is 3-5 ㎞ per hour, and during segmented rolling, static pressure is initially pressed, high frequency and low amplitude are carried out, low frequency and high amplitude are carried out, and high frequency and low amplitude are carried out finally. If the paving thickness is thinner, low-frequency high-amplitude rolling is not adopted. The road roller rolls from inside to outside in a gradient from low to high, and the edges are increased twice after light vibration, heavy vibration and light vibration. The paver rammer needs reasonable adjustment, and every layer of the paving all needs adjustment paver rammer, ensures that the initial compaction degree after every layer of the paving is all not less than 85%, and the charge level indicator adjustment ensures that the screw that buries is no less than two-thirds, and the spiral is apart from ground height will be moderate, guarantees that mixture secondary stirring is even, and the paver stirs the rubber baffle that cage striker plate lower part installation avoided the granule to roll off, prevents vertical segregation strictly. The spreading machine must advance at a constant speed, the spreading speed can be properly adjusted according to the feeding condition of the transport vehicle, and the materials such as hopper collection, machine halt and the like are reduced as far as possible. The double-machine combined paving is adopted, and the adjustment of a rammer of the paver ensures that the initial compaction degree is not less than 85 percent and is basically consistent. The front-back spacing of the paver is not more than 15m, and the lapping width is between 5 cm and 10 cm.
And step six, curing the cement stabilized macadam mixture to form a road base.
The health preserving adopts a covering health preserving film;
when the temperature is above 30 ℃, the health preserving film is a transparent plastic film;
when the temperature is below 30 ℃, the health preserving film is a black plastic film;
the health preserving film in the rainy area is a permeable geotextile.
In the curing process:
a. after rolling, the health-preserving film is covered in time, and must be pressed, particularly the edges and the outer sides, to prevent the health-preserving film from being blown up by wind.
b. And (5) closing traffic. Traffic must be closed during the maintenance period, and any vehicle traffic must be prohibited.
The permeable geotextile can only be used for maintaining a vehicle to drive when being maintained, but the vehicle speed is controlled within 30Km per hour, and emergency braking and turning are not needed.
c. And after the maintenance period is over, the plastic film for maintenance is recycled, the plastic film is determined to be unusable, and the plastic film is collected and sent to a purchasing station, so that the plastic film is strictly forbidden to be discarded and incinerated, and the environmental pollution is avoided.
The following table shows the test results of the sugar addition amount of the P.S.A32.5 cement, namely the dissolution of sugar into water and the setting time of the cement: wherein the cement sugar content is calculated according to the mass ratio of the cement: the maximum sugar content (accounting for cement) is 0-0.3 per mill.
The first embodiment is as follows: the cement stabilized macadam mixture comprises the following components in percentage by mass: 5% and sucrose: 0.1 per mill (cement); stabilized macadam coarse aggregate: 60% -65%, fine aggregate: 35 to 40 percent.
Example two: the cement stabilized macadam mixture comprises the following components in percentage by mass: 4.5%, sucrose: 0.2 per mill (cement); stabilized macadam coarse aggregate: 60% -65%, fine aggregate: 35 to 40 percent.
Example three: the cement stabilized macadam mixture comprises the following components in percentage by mass: 4% and sucrose: 0.3 per mill (cement), stabilized macadam coarse aggregate: 60% -70%, fine aggregate: 30 to 40 percent.
The initial setting and final setting time is greatly prolonged along with the increase of the sugar content.
Claims (5)
1. A road base construction method of cement stabilized macadam mixture in high-temperature seasons is characterized by comprising the following construction steps:
step one, designing the mixing proportion of the cement stabilized macadam mixture:
the cement stabilized macadam mixture comprises cement, a sucrose solution, stabilized macadam coarse aggregate and fine aggregate,
the weight ratio of the components is as follows:
cement: 3% -5%;
stabilized macadam coarse aggregate: 60% -65%;
fine aggregate: 35% -40%;
the rest is sucrose solution;
the cement sugar content is calculated according to the mass ratio of the cement, the maximum sugar content accounts for 0-0.3 per mill of the mass ratio of the cement,
adjusting according to the field sampling screening result, wherein:
the grading of the aggregate is close to an aggregate grading curve designed by indoor mixing proportion, and the deviation range of the sieve pores is controlled within +/-3 percent;
determining the quality of cement, the quality of water and the mixing amount of sucrose in the water through tests according to the temperature of site construction; wherein the water quality is the water adding amount when the cement stabilized macadam mixture reaches the optimal water content;
step two, metering and calibrating the mixer, and calibrating a cement weighing meter, an aggregate weighing meter and a water flow metering of the mixer; on the basis of metering calibration, checking the weighing equipment every month of construction;
step three, mixing and processing the cement stabilized macadam mixture:
the cement-stabilized macadam mixture is operated by a water-stabilized mixing and supplying system, the water-stabilized mixing and supplying system comprises a reservoir, a first high-concentration sucrose solution tank, a second high-concentration sucrose solution tank, a first diluted sucrose solution tank, a second diluted sucrose solution tank and a water-stabilized mixer, all the containers are connected through pipelines, and the pipelines are connected with a control water valve and a water pump;
fully dissolving sucrose in a dual concentration difference solution tank in a water-stable mixing and supplying system to form a sucrose solution with a fixed concentration, ensuring the uniform concentration of the solution, and then inputting the sucrose solution into a water-stable mixer to mix cement and aggregate to form a cement-stable crushed stone mixture;
conveying the cement stabilized macadam mixture into a transport vehicle after production, and then covering the transport vehicle; the covering adopts a canvas tent;
paving and rolling the cement stabilized macadam mixture on the roadbed;
step six, curing the cement stabilized macadam mixture to form a road base;
in the third step, raw materials of the water-stable mixing and supplying system firstly enter a reservoir after entering a factory for detection, the reservoir is connected with other pipelines by a water supply pump, the reservoir is respectively communicated with liquid inlets of a first high-concentration sucrose solution tank, a second high-concentration sucrose solution tank, a first diluted sucrose solution tank and a second diluted sucrose solution tank, liquid outlets of the first high-concentration sucrose solution tank and the second high-concentration sucrose solution tank are respectively communicated with a liquid inlet of the first diluted sucrose solution tank, liquid outlets of the first high-concentration sucrose solution tank and the second high-concentration sucrose solution tank are respectively communicated with a liquid inlet of the second diluted sucrose solution tank, and liquid outlets of the first diluted sucrose solution tank and the second diluted sucrose solution tank are respectively communicated with a liquid inlet of a water-stable mixer;
water quantity observation pipes are respectively arranged on the first diluted sucrose solution tank and the second diluted sucrose solution tank, and inlet and outlet pipelines of the first high-concentration sucrose solution tank, the second high-concentration sucrose solution tank, the first diluted sucrose solution tank and the second diluted sucrose solution tank are respectively connected with a control water valve;
circulating water pumps are additionally arranged in the first high-concentration sucrose solution tank and the second high-concentration sucrose solution tank, the circulating water pumps of the tanks need to be started 5 minutes in advance before each use to ensure the uniformity of the solution,
in the first step, the mass ratio of the cement components is 5%, and the optimal water content is 5%;
in the third step, the first high-concentration sucrose solution tank and the second high-concentration sucrose solution tank are both plastic tanks with the volume of 1.5m and the first diluted sucrose solution tank and the second diluted sucrose solution tank are both iron tanks with the volume of 20m for thin-wall cultivation,
before construction, 1.5 tons of high-concentration sucrose solutions with mass concentration of 4% are respectively prepared in a first high-concentration sucrose solution tank and a second high-concentration sucrose solution tank;
then, 100 kg of high-concentration sucrose solution is respectively injected into the first diluted sucrose solution tank and the second diluted sucrose solution tank from the first high-concentration sucrose solution tank, and then clear water is injected into the first diluted sucrose solution tank and the second diluted sucrose solution tank to be full, so that diluted sucrose solution with the mass concentration of 0.02% is formed;
putting a cement stabilized macadam mixture into a water-stabilized mixer, closing a first diluted sucrose solution tank when the diluted sucrose solution of the first diluted sucrose solution tank is used for the remaining 5 tons, and opening a second diluted sucrose solution tank for use; then, 50 kg of the high-concentration sucrose solution is injected into the first diluted sucrose solution tank from the first high-concentration sucrose solution tank, and 10 tons of clear water is injected into the first diluted sucrose solution tank at the same time; after the second diluted sucrose solution tank is used for the remaining 5 tons, the second diluted sucrose solution tank is closed, the first diluted sucrose solution tank is opened for use, 50 kilograms of sugar water are injected, and at the same time, 10 tons of clean water are injected; then circulating in sequence; and when the high-concentration sucrose solution in the first high-concentration sucrose solution tank is used up, the second high-concentration sucrose solution tank is used.
2. The method of claim 1 for constructing a road bed in a hot season, wherein: in the sixth step, in the step III,
the health preserving adopts a covering health preserving film;
when the temperature is above 30 ℃, the health preserving film is a transparent plastic film;
when the temperature is below 30 ℃, the health preserving film is a black plastic film;
the health preserving film in the rainy area is a permeable geotextile.
3. The method of claim 1 for constructing a road bed in a hot season, wherein: in the fifth step, the process is carried out,
before paving the cement stabilized macadam mixture, firstly spraying cement paste, wherein the using amount of the cement is not less than 3 kilograms per square meter, the ground is wetted by the cement paste, and the spraying length is not more than 30 meters in front of a paver;
the first layer of stable water is paved by adopting a steel wire mode to control the paving elevation; and the second layer is controlled in a steel wire walking mode or a sliding shoe walking mode.
4. The method of claim 3 for constructing a road bed in a hot season, wherein: in the fifth step, the process is carried out,
when the temperature is lower than 25 ℃, rolling in sections;
when the temperature is between 25 and 30 ℃, the length of the sectional rolling is shortened;
when the temperature is above 30 ℃, fuzzy rolling is adopted: the primary compaction roller is tightly rolled with the paver, and the turn-back length is shortened to 20 meters; one additional re-pressing roller is added, and re-pressing is completed after the echelon is followed;
and when the temperature is higher than 25 ℃ in sunny days, in windy days, a small amount of water is sprayed to the tire of the final compaction roller, so that the rolling surface is wet.
5. The method of claim 4, wherein the method comprises the steps of: in the fifth step, the rammer of the paver needs to be adjusted during paving of each layer, the initial compaction degree of each layer after paving is ensured to be not lower than 85%, the buried screw is ensured to be not less than two thirds through the adjustment of the level indicator, the screw distance from the ground is moderate, the secondary stirring uniformity of the mixture is ensured, and the rubber baffle plate for preventing particles from rolling down is installed on the lower portion of the stirring cage striker plate of the paver.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410382A (en) * | 2002-11-26 | 2003-04-16 | 武汉理工大学 | Super retarder used for delaying setting time of cement stable road surface base material |
| CN102358687A (en) * | 2011-08-05 | 2012-02-22 | 哈尔滨工业大学深圳研究生院 | Method for preparing recycled concrete by using sucrose water reducer and recycled concrete |
| CN102834169A (en) * | 2010-04-08 | 2012-12-19 | 新东工业株式会社 | A circulating-type dispersing system and a method therefor |
| CN103601417A (en) * | 2013-11-15 | 2014-02-26 | 江苏百瑞吉新材料有限公司 | Super retarder |
| CN104628283A (en) * | 2015-02-09 | 2015-05-20 | 湖南中建五局混凝土有限公司 | Concrete retarder prepared by utilizing waste water of mixing plant and blackstrap of sugar refinery as well as preparation method and use method of concrete retarder |
| CN104997143A (en) * | 2015-07-14 | 2015-10-28 | 湖南九鼎科技（集团）永州鼎立饲料有限公司 | Molasses addition system of mixer and molasses addition technology of molasses addition system |
| CN106894308A (en) * | 2017-02-16 | 2017-06-27 | 昆山市交通工程有限公司 | A kind of crack resistance construction of cement stable macadam base method |
| CN207397140U (en) * | 2017-10-25 | 2018-05-22 | 广西南宁冠控电子科技有限公司 | A kind of continuous on-line automatic heating of sugar refinery molasses is diluted with water system |
| CN110002817A (en) * | 2019-03-20 | 2019-07-12 | 上海家根路基材料有限公司 | A kind of cement stabilized macadam material and its preparation process |
| CN110331633A (en) * | 2019-06-05 | 2019-10-15 | 中建八局第三建设有限公司 | A kind of cement stabilized macadam construction Craft |
-
2019
- 2019-10-16 CN CN201910983736.8A patent/CN110714382B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410382A (en) * | 2002-11-26 | 2003-04-16 | 武汉理工大学 | Super retarder used for delaying setting time of cement stable road surface base material |
| CN102834169A (en) * | 2010-04-08 | 2012-12-19 | 新东工业株式会社 | A circulating-type dispersing system and a method therefor |
| CN102358687A (en) * | 2011-08-05 | 2012-02-22 | 哈尔滨工业大学深圳研究生院 | Method for preparing recycled concrete by using sucrose water reducer and recycled concrete |
| CN103601417A (en) * | 2013-11-15 | 2014-02-26 | 江苏百瑞吉新材料有限公司 | Super retarder |
| CN104628283A (en) * | 2015-02-09 | 2015-05-20 | 湖南中建五局混凝土有限公司 | Concrete retarder prepared by utilizing waste water of mixing plant and blackstrap of sugar refinery as well as preparation method and use method of concrete retarder |
| CN104997143A (en) * | 2015-07-14 | 2015-10-28 | 湖南九鼎科技（集团）永州鼎立饲料有限公司 | Molasses addition system of mixer and molasses addition technology of molasses addition system |
| CN106894308A (en) * | 2017-02-16 | 2017-06-27 | 昆山市交通工程有限公司 | A kind of crack resistance construction of cement stable macadam base method |
| CN207397140U (en) * | 2017-10-25 | 2018-05-22 | 广西南宁冠控电子科技有限公司 | A kind of continuous on-line automatic heating of sugar refinery molasses is diluted with water system |
| CN110002817A (en) * | 2019-03-20 | 2019-07-12 | 上海家根路基材料有限公司 | A kind of cement stabilized macadam material and its preparation process |
| CN110331633A (en) * | 2019-06-05 | 2019-10-15 | 中建八局第三建设有限公司 | A kind of cement stabilized macadam construction Craft |
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