CN108911603A - A kind of mass concrete and its preparation and construction technology - Google Patents
A kind of mass concrete and its preparation and construction technology Download PDFInfo
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- CN108911603A CN108911603A CN201810841267.1A CN201810841267A CN108911603A CN 108911603 A CN108911603 A CN 108911603A CN 201810841267 A CN201810841267 A CN 201810841267A CN 108911603 A CN108911603 A CN 108911603A
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- retarder
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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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/16—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material
-
- 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
Abstract
The present invention discloses a kind of mass concrete and its preparation and construction technology, is related to concrete field.It is intended to by improving the problem of concrete formulation and concrete construction process are to improve concrete cracking.Concrete includes the component of following parts by weight, 170-180 parts of water, 180-185 parts of cement, 5.11-5.12 parts of 160-175 parts of 94-100 parts of 1000-1100 parts of rubble, extra material, miberal powder, the additive that sand 635-730 parts middle, partial size is 5-25mm；The additive includes water-reducing agent and retarder.By layering and subregion construction in construction, several stainless steel punching network managements are plugged in concrete again after the completion of every layer of concrete construction.From formula to construction, improved, wherein the aquation peak period that concrete can be effectively improved by the way that retarder is added in the formula of concrete, the cracking phenomena after reducing concrete setting；The use of stainless steel punching network management, increases the function and effect of the heat dissipation of concrete in concrete construction, is further reduced because of the crack that concrete caused by the generation of the heat of hydration occurs.
Description
Technical field
The present invention relates to concrete field more particularly to a kind of mass concrete and its preparation and construction technologies.
Background technique
《Large volume coagulation job specfication》In paraphrase that mass concrete is provided include property and two dimensions of volume.
For from volume, mass concrete refers to that works entity minimum geometries are not less than the concrete of 1m；From in nature
For, refer to because containing shrink caused by cementitious material aquation and due to temperature change caused by crannied concrete.
With the rapid development of social economy, modern all kinds of architectural engineerings such as skyscraper, hydraulic engineering, large scale equipment etc.
In the mass concrete that applies to it is higher and higher come the probability constructed.Mass concrete is mainly characterized by volume
Greatly, internal temperature heating rapidly, hydration heat of cement release compare concentrations, and when its internal-external temperature difference is larger, it is easy to cause warm
Crack is spent, this crack gently then influences the appearance of construction project, and it is heavy then influence its anti-permeability performance and general safety, it buries many hidden
Suffer from.
Authorization Notice No. is that the Chinese patent of CN101486548B discloses a kind of C50 mass concrete, specific raw material
Parts by weight be：300 parts of cement, 1100 parts of rubble, 620 parts of sand, 180 parts of water, 200 parts of ground slag, additive SPA7
Part.
The granted patent document, which goes out, utilizes the concrete mix, and cooperation other measures carry out mass concrete and apply
Work can make mass concrete effect of anti-cracking more preferable.
Although the additive SPA being added in formula can be by the dosage of reduction cement to reduce the heat of hydration, further
Reduction concrete crack, but still will appear crack in actual work progress.And the patent document does not disclose
The specifically method on how to prepare mass concrete.It is combined with accordingly so still needing to develop a kind of mass concrete
Construction technology is to reduce the cracking of concrete.
Summary of the invention
The purpose of the present invention is to provide a kind of mass concrete, have the advantages that crack in the construction process few.
Above-mentioned purpose of the invention technical scheme is that：
A kind of mass concrete, the component including following parts by weight, 170-180 parts of water, 180-185 parts of cement, middle sand
635-730 parts, 160-175 parts of 94-100 parts of 1000-1100 parts of rubble, extra material, miberal powder, the additive that partial size is 5-25mm
5.11-5.12 part；The additive includes water-reducing agent and retarder；The weight fraction ratio of water-reducing agent and retarder is 5.1:
(0.11-0.12)。
Implement above-mentioned technical proposal, cement is used as cementitious material, and middle sand and rubble enhance concrete as aggregate
Compression strength.
The addition of extra material can improve the mechanical property of concrete.
Miberal powder is the general designation for meeting the mountain flour and its substitute of engine request, be by the product after ore crushing and processing, to
Miberal powder is added in concrete can reduce the dosage of cement, and the workability, the reduction heat of hydration, enhancement later period for improving concrete are strong
Degree, improves impervious and resistance to corrosion at the internal structure for improving concrete.It can prolong after mixing levigate mineral powder in concrete
The hydration rate of slow cementitious material, extends the setting time of concrete, there is construction and conveying using high temperature season concrete.
The addition of retarder can increase the setting time of concrete, delay aquation peak period, further reduce aquation
The influence of crackle caused by heat.
The use of water-reducing agent can reduce the heat of hydration during concrete setting, then further reduce the production of the heat of hydration
It is raw.
In overall composition, cooperating between component, collaboration uses, and the peak period of hydrated cementitious is reduced, cracking is reduced,
The function admirable of concrete.
Further, the retarder includes following weight percentage components：Modified pulp black liquor 20-40%, maltose
30-40%, chitosan 10-20%, milk of lime 3-18%, calcium lignosulfonate 10-18%, aluminum sulfate 1-5%.
Implement above-mentioned technical proposal, the use of black liquor increases the utilization rate of secondary stock black liquor in retarder, more
Environmental protection.
Maltose and chitosan have stronger solid-liquid surface-active, can be adsorbed on cement minerals particle surface formed it is molten
Agent adsorption layer hinders the contact and cohesion of particle, destroys the flocculent structure of cement, makes cement initial stage aquation sugar calcium containing multiple hydroxyls
Base has stronger inhibiting effect to cement initial stage aquation, and increases free water, improves the mobility of cement slurry, slows down cement
Setting rate.
And maltose and chitosan can also react generation saccharification calcium class complex compound with milk of lime and calcium lignosulfonate, into one
Step slows down the setting rate of cement.
Chitosan itself has antibiotic property, and the phenomenon that concrete easily goes mouldy can be improved by being added in concrete.
The aluminum sulfate of addition can be used cooperatively with starch and sucrose, reduce the crack of concrete.
It cooperates between set retarder components, improves the function of slump protection of concrete, can also reduce because retarder slow setting is imitated
The building striking time of concrete caused by fruit is long to denounce.
Further, the modified pulp black liquor includes following treatment process：Using sulphur acid for adjusting pH to 10-11, paper is added
The ferric trichloride of black liquor quality 1-2 ‰ and the sodium sulfite of 20-30% are starched, constant temperature 2-4 hours at 80-85 DEG C of temperature, then is used
It is 7-9 that sulfuric acid, which is neutralized to pH,.
Implement above-mentioned technical proposal, which more as far as possible can come out the lignin extraction in black liquor, react shape
At lignosulfonates, reaction process is simple, and when being used cooperatively with sucrose and starch, the effect of slow setting is more significant.
Further, the retarder includes following preparation process：Maltose, chitosan are added to stirrer for mixing
Uniformly, the first mixture is obtained；Milk of lime, calcium lignosulfonate and aluminum sulfate are continuously added into the first mixture, continue to stir
Uniformly, obtain the second mixture, black liquor is added into the second mixture be uniformly mixed both retarder.
Implement above-mentioned technical proposal, the preparation of retarder is just completed by above-mentioned operating process, operating process is compared
Simply.
Further, the water-reducing agent selects lignin sulfonic acid sodium salt.
Implement above-mentioned technical proposal, lignin sulfonic acid sodium salt can cooperate between retarder, not only act as reduction water
The effect of mud dosage, and the function of slump protection of concrete can be improved.
Further, the extra material includes flyash, bentonite and bamboo fibre.
Further, the weight fraction ratio of the flyash, bentonite and bamboo fibre is 73: (20-25): (1-2).
Implement above-mentioned technical proposal, flyash is added into concrete the gap for capableing of filler aggregate particle and wraps up them
Lubricant layer is formed, since the capacity of flyash only has 2/3 or so of cement, and particle shape is good, therefore can fill more closely knit；It is right
Cement granules play physical dispersion, disperse cement granules more uniform；It flyash and is enriched in around particles of aggregates
Pozzolanic reaction occurs for calcium hydroxide crystallization, not only generates the product with gelling property, but also strengthens weak transition region,
There is remarkable effect to the properties for improving concrete；Flyash has delayed hydration rate, reduces concrete because aquation is thermally-induced
Temperature rise, to prevent concrete generate thermal cracking it is highly beneficial.
Bentonite is the aqueous clay pit based on montmorillonite, has bloating tendency, caking property, adsorptivity, catalytic, thixotroping
Property, suspension and cationic exchangeability etc., the flexural strength that can enhance concrete is used cooperatively with flyash and is resisted
Compressive Strength.
Bamboo fibre can limit microcrack and occur in cement matrix and develop, mixed as a kind of green ecological fiber
In each stage of solidifying earth forming, bamboo fibre, which is dispersed in concrete, can undertake the tensile stress for shrinking bleed to reduce or even hinder
The generation of crack arrest seam.
Another goal of the invention of the invention is to provide a kind of preparation method of mass concrete have easy to operate
Advantage.
A kind of preparation method of mass concrete, including following preparation step,
Step 1：The each component of mass concrete is weighed according to parts by weight, it is spare；
Step 2：Cement, middle sand, rubble, extra material, miberal powder and water are sequentially added and stir 1-3min in blender, mixing is equal
It is even；
Step 3：Continue that additive mixing 2-4min is added into blender, stir evenly, discharges.
Implement above-mentioned technical proposal, implements the preparation that above scheme completes concrete, it is easy to operate.
Another goal of the invention of the invention is to provide a kind of construction technology of mass concrete, reduce after having construction
The advantages of concrete cracking.
A kind of construction technology of mass concrete, including following construction procedure：
S1：Equipment prepares and checks；
S2：To template, the reinforcing bar, built-in fitting, the comprehensive minute inspection of hole to be provided progress for pouring position before pouring, record is performed；
S3：It pours：It is divided into four casting area according to successively equidistant from left to right, each casting area indwelling is slow to pour region,
Slow region of pouring is retained on the right of casting area；Four casting area are voluntarily poured when pouring, and are each delayed and poured region subdivision
Casting, carries out next layer after every layer concrete pours and finishes 13-15 hours again and pours；
S4：After smearing receipts pressure final set using wood after the completion of pouring, using showering curing 7-10 days after plastic film plus straw mattress covering.
Implement above-mentioned technical proposal, placement layer by layer can make as far as possible the heat of hydration of concrete lose, accelerate aquation
Heat abstraction reduces heat among the cement of primary concreting appearance and dissipates the problem of not going out.Therefore it is poured using which,
Reduce the cracking of concrete.
Further, after the completion of every layer concrete pours, several stainless steel punchings being spaced apart are inserted in concrete
Hole network management.
Implement above-mentioned technical proposal, the setting of stainless steel punching network management can play the role of increasing the heat dissipation effect of concrete
Fruit is further reduced because of the crack that concrete caused by the generation of the heat of hydration occurs.
In conclusion the invention has the advantages that：
One, the aquation peak period that can be effectively improved concrete by the way that retarder is added in concrete formulation of the invention, is reduced
Cracking phenomena after concrete setting；
Two, the use of chitosan can not only play the function and effect of slow setting in retarder, and can also play the effect of antibacterial,
Reduce the mildew of concrete；
Three, outer-penetrating agent selects flyash, bentonite, bamboo fibre, and three cooperates addition to use, effectively improves the mechanics of concrete
Performance；
Four, in concrete construction stainless steel punching network management use, increase the function and effect of the heat dissipation of concrete, further
It reduces because of the crack that concrete caused by the generation of the heat of hydration occurs.
Specific embodiment
The technical solution of the embodiment of the present invention will be described below.
Embodiment one
Mass concrete includes following components by weight percent：Water 170kg, cement 180kg, middle sand 730kg, partial size are the broken of 5-25mm
Stone 1000kg, extra material 100kg, miberal powder 175kg, additive 5.11kg；Additive includes water-reducing agent and retarder；Water-reducing agent is
The lignin sulfonic acid sodium salt of 5.1kg.
Extra material specifically includes flyash, bentonite and bamboo fibre.Specific flyash is 73kg, bentonite 25kg,
Bamboo fibre is 2kg.
Retarder includes modified pulp black liquor 0.002kg, maltose 0.004kg, chitosan 0.0011kg, milk of lime
0.0018kg, calcium lignosulfonate 0.001kg, aluminum sulfate 0.0001kg.
Modified pulp black liquor includes following treatment process：Using sulphur acid for adjusting pH to 10, black liquor quality is added
The ferric trichloride of 0.002g and the sodium sulfite of 0.4g, the constant temperature 2 hours at 80 DEG C of temperature, then neutralizing with sulfuric acid to pH is 7.
Retarder includes following preparation process：Maltose, chitosan are added uniform to stirrer for mixing, obtain first
Mixture；Milk of lime, calcium lignosulfonate and aluminum sulfate are continuously added into the first mixture, are continued to stir evenly, are obtained second
Mixture, black liquor is added into the second mixture be uniformly mixed both retarder.
The preparation method of mass concrete, including following preparation step,
Step 1：The each component of mass concrete is weighed according to parts by weight, it is spare；
Step 2：Cement, middle sand, rubble, extra material, miberal powder and water are added in blender dimly and stir 1min, is uniformly mixed；
Step 3：Continue that additive mixing 2min is added into blender, stir evenly, discharges.
The construction technology of mass concrete, including following construction procedure：
S1：Equipment prepare and check, concrete pump, pump line, fixture, tumbling barrel, hopper, smash shake device and floating rule prepare as needed
Sufficiently；
S2：To template, the reinforcing bar, built-in fitting, the comprehensive minute inspection of hole to be provided progress for pouring position before pouring, record is performed；
S3：It pours：It is divided into four casting area according to successively equidistant from left to right, each casting area indwelling is slow to pour region,
Slow region of pouring is retained on the right of casting area；Four casting area are voluntarily poured when pouring, and are each delayed and poured region subdivision
Casting, is poured again after every layer concrete pours and finishes 13 hours；After the completion of every layer concrete pours, in concrete
It is inserted with several stainless steel punching network managements.Distance between each stainless steel punching network management is 1m.
S4：After smearing receipts pressure final set using wood after the completion of pouring, using showering curing 7 days after plastic film plus straw mattress covering.
Embodiment two
Embodiment two is that the content of concrete component is different from the difference of embodiment one, modified pulp black liquor, concrete processing
With the difference of parameter in construction technology.
Component is referring to Tables 1 and 2.
Modified pulp black liquor includes following treatment process：Using sulphur acid for adjusting pH to 10, black liquor quality is added
The ferric trichloride of 0.0025g and the sodium sulfite of 0.5g, the constant temperature 3 hours at 80 DEG C of temperature, then neutralizing with sulfuric acid to pH is 8.
The preparation method of mass concrete, including following preparation step,
Step 1：The each component of mass concrete is weighed according to parts by weight, it is spare；
Step 2：Cement, middle sand, rubble, extra material, miberal powder and water are added in blender dimly and stir 2min, is uniformly mixed；
Step 3：Continue that additive mixing 3min is added into blender, stir evenly, discharges.
The construction technology of mass concrete, including following construction procedure：
S1：Equipment prepare and check, concrete pump, pump line, fixture, tumbling barrel, hopper, smash shake device and floating rule prepare as needed
Sufficiently；
S2：To template, the reinforcing bar, built-in fitting, the comprehensive minute inspection of hole to be provided progress for pouring position before pouring, record is performed；
S3：It pours：It is divided into four casting area according to successively equidistant from left to right, each casting area indwelling is slow to pour region,
Slow region of pouring is retained on the right of casting area；Four casting area are voluntarily poured when pouring, and are each delayed and poured region subdivision
Casting, is poured again after every layer concrete pours and finishes 14 hours；After the completion of every layer concrete pours, in concrete
It is inserted with several stainless steel punching network managements.Distance between each stainless steel punching network management is 1m.
S4：After smearing receipts pressure final set using wood after the completion of pouring, using showering curing 8 days after plastic film plus straw mattress covering.
Embodiment three
Embodiment three is that the content of concrete component is different from the difference of embodiment one, modified pulp black liquor, concrete processing
With the difference of parameter in construction technology.
Component is referring to Tables 1 and 2.
Modified pulp black liquor includes following treatment process：Using sulphur acid for adjusting pH to 11, black liquor quality is added
The ferric trichloride of 0.006g and the sodium sulfite of 0.12g, the constant temperature 4 hours at 85 DEG C of temperature, then neutralizing with sulfuric acid to pH is 9.
The preparation method of mass concrete, including following preparation step,
Step 1：The each component of mass concrete is weighed according to parts by weight, it is spare；
Step 2：Cement, middle sand, rubble, extra material, miberal powder and water are added in blender dimly and stir 3min, is uniformly mixed；
Step 3：Continue that additive mixing 4min is added into blender, stir evenly, discharges.
The construction technology of mass concrete, including following construction procedure：
S1：Equipment prepare and check, concrete pump, pump line, fixture, tumbling barrel, hopper, smash shake device and floating rule prepare as needed
Sufficiently；
S2：To template, the reinforcing bar, built-in fitting, the comprehensive minute inspection of hole to be provided progress for pouring position before pouring, record is performed；
S3：It pours：It is divided into four casting area according to successively equidistant from left to right, each casting area indwelling is slow to pour region,
Slow region of pouring is retained on the right of casting area；Four casting area are voluntarily poured when pouring, and are each delayed and poured region subdivision
Casting, is poured again after every layer concrete pours and finishes 15 hours；After the completion of every layer concrete pours, in concrete
It is inserted with several stainless steel punching network managements.Distance between each stainless steel punching network management is 1m.
S4：After smearing receipts pressure final set using wood after the completion of pouring, using showering curing 10 days after plastic film plus straw mattress covering.
Example IV
Example IV is that the content of concrete component is different from the difference of embodiment one.Component is referring to Tables 1 and 2.
Embodiment five
Embodiment five is that the content of concrete component is different from the difference of embodiment one.Component is referring to Tables 1 and 2.
Table 1 is each component content of the concrete of embodiment 1-5.
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Water/kg | 170 | 173 | 175 | 177 | 180 |
| Cement/kg | 180 | 181 | 182 | 183 | 185 |
| Middle sand/kg | 730 | 711 | 688 | 671 | 636 |
| Rubble/kg | 1000 | 1020 | 1050 | 1070 | 1100 |
| Extra material/kg | 100 | 100 | 95 | 94 | 94 |
| Miberal powder/kg | 175 | 170 | 165 | 160 | 160 |
| Additive/kg | 5.11 | 5.11 | 5.12 | 5.12 | 5.12 |
Table 2 is the content of the extra material of embodiment 1-5, additive.
Comparative example 1
Comparative example 1 is the difference from embodiment 1 is that the retarder in comparative example 1 selects triumphant Jianchang, Beijing to contain the limited public affairs of engineering technology
The super-retarder of production is taken charge of, other are consistent with embodiment 1.
Comparative example 2
Comparative example 2 the difference from example 2 is that do not contain aluminum sulfate in retarder in comparative example 2, other with embodiment 1
It is consistent.
Comparative example 3
The difference of comparative example 3 and embodiment 3 is that the outer-penetrating agent in comparative example 3 only includes flyash, other are protected with embodiment 1
It holds consistent.
Comparative example 4
The difference of comparative example 4 and embodiment 4 is that the outer-penetrating agent in comparative example 4 does not include bamboo fibre, other are protected with embodiment 1
It holds consistent.
Experiment detection
1, according to GB/T 50081-2002《Normal concrete mechanical property tests method standard》Test the mechanical property of concrete
Energy；
2, cracking of reinforced concrete is detected with Ring test：That cracking time < 1h is very poor cement, cracking time > 15h
It is excellent；
3, retarding time：According to GB/T 1346-89《Cement normal consistency water consumption, setting time, stability experimental method》Into
Row measurement.
The laboratory test results of the mechanical performance of concrete of table 3 embodiment 1-5 and comparative example 1-4.
It can be obtained by the experimental result of embodiment 1-5 in table 3, the mechanical property of the concrete of embodiment 1-5 is to meet
Requirement.
The experimental result of comparative example 1 and comparative example 1 again, in retarder difference, the mechanical property of concrete occurs
Variation, then applicant can reasonably derive retarder in component by influencing the setting time of concrete, further
Affect the mechanical property of concrete.
It is mixed to can be derived that the addition of aluminum sulfate in retarder can increase for the experimental result of comparative example 1 and comparative example 2
Coagulate the mechanical property of soil.
The experimental result of comparative example 1 and comparative example 3 and comparative example 4, bamboo fibre in additive and bentonitic adds
Add the mechanical property that can increase concrete.
The laboratory test results of the crack resistance performance of table 4 embodiment 1-5 and comparative example 1-4.
By the experimental data of table 4, it can be seen that the cracking resistance for the concrete for matching out according to the constituent content in the application
Performance is more excellent, can further obtain from comparative example 1, and the selection of coagulant equally can be to the cracking behavior of concrete
It can have an impact.
The laboratory test results of the retarding time of table 5 embodiment 1-5 and comparative example 1-4.
It can be derived that, the presetting period of the concrete in present specification and final setting time, differ by the experimental data of table 5
Larger, then concrete can have time enough to shed the heat of hydration when solidification, and concrete is not easy to crack after solidification,
It further can be derived that, the selection of retarder equally can generate bigger influence to the retarding time for improving concrete.
It can be obtained in conjunction with the experimental data of table 3- table 5, select suitable coagulant, to mixed while improving retarding time
The mechanical property and cracking performance for coagulating soil can have an impact.
Claims (10)
1. a kind of mass concrete, which is characterized in that the component including following parts by weight, 170-180 parts of water, cement 180-
185 parts, 94-100 parts of 1000-1100 parts of rubble, extra material, the miberal powder 160-175 that sand 635-730 parts middle, partial size is 5 ~ 25mm
Part, 5.11-5.12 parts of additive；The additive includes water-reducing agent and retarder；The weight fraction ratio of water-reducing agent and retarder
It is 5.1：（0.11-0.12）.
2. a kind of mass concrete according to claim 1, which is characterized in that the retarder includes following weight
The component of percentage：Modified pulp black liquor 20-40%, maltose 20-40%, chitosan 10-20%, milk of lime 3-18%, lignin
Sulfoacid calcium 10-18%, aluminum sulfate 1-5%.
3. a kind of mass concrete according to claim 2, which is characterized in that the modified pulp black liquor includes as follows
Treatment process：Using sulphur acid for adjusting pH to 10-11, the ferric trichloride of black liquor quality 1-2 ‰ and the sulfurous of 20-30% is added
Sour sodium, constant temperature 2-4 hours at 80-85 DEG C of temperature, then neutralizing with sulfuric acid to pH is 7-9.
4. a kind of mass concrete according to claim 3, which is characterized in that the retarder includes following preparation
Process：Maltose, chitosan are added uniform to stirrer for mixing, obtain the first mixture；Continue to add into the first mixture
Enter milk of lime, calcium lignosulfonate and aluminum sulfate, continue to stir evenly, obtain the second mixture, black liquor is added to second
It is uniformly mixed in mixture and both obtains retarder.
5. a kind of mass concrete according to claim 1, which is characterized in that the water-reducing agent selects lignin sulfonic acid
Sodium salt.
6. a kind of mass concrete according to claim 1, which is characterized in that the extra material includes flyash, swollen
Profit soil and bamboo fibre.
7. a kind of mass concrete according to claim 6, which is characterized in that the flyash, bentonite and bamboo are fine
The weight fraction ratio of dimension is 73：（20-25）：（1-2）.
8. a kind of preparation method of mass concrete as described in claim 1-7 any one, which is characterized in that including such as
Under preparation step,
Step 1：The each component of mass concrete is weighed according to parts by weight, it is spare；
Step 2：Cement, middle sand, rubble, extra material, miberal powder and water are sequentially added and stir 1-3min in blender, mixing is equal
It is even；
Step 3：Continue that additive mixing 2-4min is added into blender, stir evenly, discharges.
9. a kind of construction technology of mass concrete as claimed in claim 8, which is characterized in that walked including following construction
Suddenly：
S1：Equipment prepares and checks；
S2：To template, the reinforcing bar, built-in fitting, the comprehensive minute inspection of hole to be provided progress for pouring position before pouring, record is performed；
S3：It pours：It is divided into four casting area according to successively equidistant from left to right, each casting area indwelling is slow to pour region,
Slow region of pouring is retained on the right of casting area；Four casting area are voluntarily poured when pouring, and are each delayed and poured region subdivision
Casting, carries out next layer after every layer concrete pours and finishes 13-15 hours again and pours；
S4：After smearing receipts pressure final set using wood after the completion of pouring, using showering curing 7-10 days after plastic film plus straw mattress covering.
10. a kind of construction technology of mass concrete according to claim 9, which is characterized in that in every layer concrete
After the completion of pouring, it is inserted in concrete and several is spaced apart stainless steel punching network management.
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| CN201810841267.1A CN108911603B (en) | 2018-07-26 | 2018-07-26 | Large-volume concrete and preparation and construction process thereof |
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| CN201810841267.1A CN108911603B (en) | 2018-07-26 | 2018-07-26 | Large-volume concrete and preparation and construction process thereof |
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| CN109796146A (en) * | 2019-03-04 | 2019-05-24 | 东南大学 | A kind of hydrated cementitious controlled material and its preparation method and application |
| CN109836081A (en) * | 2018-12-29 | 2019-06-04 | 苏州科技大学 | A kind of water-proofing anticracking armored concrete |
| CN110041025A (en) * | 2019-04-04 | 2019-07-23 | 广西建工集团冶金建设有限公司 | A kind of ameliorative mass concrete and preparation method thereof |
| CN110482946A (en) * | 2019-08-10 | 2019-11-22 | 江苏宇辉住宅工业有限公司 | A kind of ultra-large volume high intensity low hydration heat concrete |
| CN110761561A (en) * | 2019-10-18 | 2020-02-07 | 中铁八局集团第六工程有限公司 | Construction process of special concrete for compensating crack resistance |
| CN111499254A (en) * | 2020-04-17 | 2020-08-07 | 广东中林建筑园林工程有限公司 | Preparation method of coagulant for building engineering |
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| CN109836081B (en) * | 2018-12-29 | 2021-08-24 | 苏州科技大学 | Waterproof anti-crack reinforced concrete |
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| CN110482946A (en) * | 2019-08-10 | 2019-11-22 | 江苏宇辉住宅工业有限公司 | A kind of ultra-large volume high intensity low hydration heat concrete |
| CN112551935A (en) * | 2019-09-25 | 2021-03-26 | 中路高科交通检测检验认证有限公司 | Concrete hydration heat inhibiting material and preparation method thereof |
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| CN111499254A (en) * | 2020-04-17 | 2020-08-07 | 广东中林建筑园林工程有限公司 | Preparation method of coagulant for building engineering |
| CN112609819A (en) * | 2020-11-11 | 2021-04-06 | 河海大学 | Concrete member and temperature control method thereof |
| CN112661458A (en) * | 2020-12-25 | 2021-04-16 | 北京金隅混凝土有限公司 | Crack-resistant large-volume concrete and preparation method thereof |
| CN113187240A (en) * | 2021-05-25 | 2021-07-30 | 国厦建设有限公司 | Concrete pouring method for reducing crack generation |
| CN113402233A (en) * | 2021-07-23 | 2021-09-17 | 中国电建集团四川工程有限公司 | Large-volume concrete, preparation method and construction process thereof |
| CN113402233B (en) * | 2021-07-23 | 2022-11-25 | 中国电建集团四川工程有限公司 | Mass concrete, preparation method and construction process thereof |
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