CN110041025A - A kind of ameliorative mass concrete and preparation method thereof - Google Patents
A kind of ameliorative mass concrete and preparation method thereof Download PDFInfo
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- CN110041025A CN110041025A CN201910269818.6A CN201910269818A CN110041025A CN 110041025 A CN110041025 A CN 110041025A CN 201910269818 A CN201910269818 A CN 201910269818A CN 110041025 A CN110041025 A CN 110041025A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag 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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
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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
- C04B2111/20—Resistance against chemical, physical or biological attack
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to technical field of building construction, and in particular to a kind of ameliorative mass concrete and preparation method thereof.Ameliorative mass concrete provided by the invention is prepared by comprising the following components in parts by weight: 900~1100 parts of rubble；780~950 parts of sand；180~220 parts of cement；120~160 parts of flyash；19~23 parts of bentonite；6~9 parts of water-reducing agent；165~175 parts of water.The present invention is using rubble and sand as aggregate, with the use of cement, water-reducing agent and water, flyash and bentonite are added simultaneously, under the collective effect of raw material, solidifying the ameliorative mass concrete being prepared, slow, internal-external temperature difference is small, heat of hydration release time is long, mass concrete is avoided because the release of heat of hydration undue concentration causes its internal difference in temperature excessive and generates crack, and compactness, waterproofness, durability, crushing resistance and anti-permeability performance are excellent.
Description
Technical field
The present invention relates to technical field of building construction, and in particular to a kind of ameliorative mass concrete and its preparation side
Method.
Background technique
" mass concrete construction specification " GB 50496-2009 is to mass concrete is defined as: concrete structure
Object entity minimum geometries are not less than the big scale of construction concrete of 1m；Or it is expected that caused by because of cementitious material aquation in concrete
Temperature change and the concrete for shrinking and causing harmful cracks generation.The structure of mass concrete mainly include raft foundation and
Isolated footing, wherein the maximum gauge of isolated footing is generally 1100mm.
When carrying out pouring construction using conventional mass concrete in the prior art, due to mass concrete thickness mistake
Greatly, in process of setting, the heat of hydration can concentrate in a short time generation and discharge concrete, cause the solidification of mass concrete
Crack is generated with shrinking uneven, so that the total quality of mass concrete declines, reduces its compression strength, impermeability
Energy and durability.
In order to guarantee the integral construction quality of concrete, generally requires additional increase and cool down, heat dissipation, heat preservation, reinforce maintenance
With increase monitoring etc. many measures.If but there is careless mistake in some part, then will lead to concrete and crack occur, quality is just
Design and code requirement is not achieved.
Summary of the invention
It is provided by the invention to change the purpose of the present invention is to provide a kind of ameliorative mass concrete and preparation method thereof
Benign mass concrete solidification is slow, and the heat of hydration generates and release is slow, crack, and compactness, waterproof performance, durability does not occur
It can be good with compressive property.Preparation method provided by the invention industrialized production easy to operate, low in cost, suitable.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of ameliorative mass concretes, are prepared by comprising the following components in parts by weight:
900~1100 parts of rubble；
780~950 parts of sand；
180~220 parts of cement；
120~160 parts of flyash；
19~23 parts of bentonite；
6~9 parts of water-reducing agent；
165~175 parts of water.
Preferably, the granularity of the rubble is 5~40mm.
Preferably, the sand includes one or more of river sand, mountain sand and mountain flour；The granularity of the sand be 3.0~
2.3mm, gradation are II grades.
Preferably, the strength grade of the cement be 42.5 grades, the type of the cement include ordinary portland cement and/
Or portland slag cement.
Preferably, the cement includes one or more of pozzolan cement, slag cements and pulverized fuel ash cement.
Preferably, the granularity of the flyash is 300~400 mesh.
Preferably, the bentonite includes one of sodium bentonite, calcium and magnesium base bentonite and organobentonite or several
Kind.
Preferably, the water-reducing agent includes polyol, hydroxycarboxylate, hydroxycarboxylic acid salt derivative, high sugar wood
One or more of mahogany sulfonate, zinc chloride, borate and phosphate.
The present invention also provides the preparation methods of ameliorative mass concrete described in above-mentioned technical proposal, including following step
It is rapid:
Rubble, sand and part water are stirred, wet mixing is obtained and closes aggregate；
Addition cement in aggregate is closed in the wet mixing to carry out making shell stirring, obtains the mixed material containing cement；
Addition bentonite, remaining water, flyash and water-reducing agent, which be gelatinized, in the mixed material containing cement stirs
It mixes, obtains ameliorative mass concrete.
Preferably, the dosage of the part water is the 65~75% of the total dosage of water；
Preferably, the time being stirred is 10~20s；
Preferably, the time for making shell stirring is 20~35s；
Preferably, the time of the gelatinization stirring is 55~65s.
The present invention provides a kind of ameliorative mass concretes, are prepared by comprising the following components in parts by weight: broken
900~1100 parts of stone；780~950 parts of sand；180~220 parts of cement；120~160 parts of flyash；19~23 parts of bentonite；Subtract
6~9 parts of aqua；165~175 parts of water.The present invention is used cooperatively cement, water-reducing agent and water using rubble and sand as aggregate, adds simultaneously
Enter flyash and bentonite, under the collective effect of each raw material, so that obtained ameliorative mass concrete setting time
Length, internal-external temperature difference are small, heat of hydration release is grown, and avoid mass concrete because the release of heat of hydration undue concentration causes inside it
Excessive temperature differentials and generate crack, and compactness, waterproof performance, endurance quality, compressive property and anti-permeability performance are excellent.
The present invention also provides the preparation methods of ameliorative mass concrete described in above-mentioned technical proposal, including following step
It is rapid: rubble, sand and part water being stirred, wet mixing is obtained and closes aggregate；Addition cement in aggregate is closed in the wet mixing to be made
Shell stirring, obtains the mixed material containing cement；Bentonite, remaining water, powder are added in the mixed material containing cement
Coal ash and water-reducing agent carry out gelatinization stirring, obtain ameliorative mass concrete.Large volume provided by the invention improves concrete
It in casting process, is poured by normal concrete, casting of concrete in mass is omitted compared with the existing technology and applies
Cooling that work early period uses, heat dissipation preparation, the temperature monitoring work of pouring construction process, and the inside after the completion of pouring
Cooling and external covering work, enormously simplify preparation process, reduce construction cost.
Specific embodiment
The present invention provides a kind of ameliorative mass concretes, which is characterized in that by comprising the following components in parts by weight
It is prepared:
900~1100 parts of rubble；
780~950 parts of sand；
180~220 parts of cement；
120~160 parts of flyash；
19~23 parts of bentonite；
6~9 parts of water-reducing agent；
165~175 parts of water.
In the present invention, if without specified otherwise, all raw material components are commercially available quotient well known to those skilled in the art
Product.
In the present invention, according to parts by weight, prepare the ameliorative mass concrete raw material include rubble 900~
1100 parts, preferably 904~1000 parts, more preferably 910~950 parts.In the present invention, the granularity of the rubble is preferably 5
~40mm, more preferably 10~40mm.Ballast grain sizes control is the strong of guarantee concrete in the purpose of 5~40mm by the present invention
Degree, and meet its conveying and vibration compacting requirement.
In the present invention, on the basis of the mass fraction of rubble, the raw material packet of the ameliorative mass concrete is prepared
Include 700~950 parts of sand, preferably 783~944 parts, more preferably 900~944 parts, more preferably 910~944 parts.In this hair
In bright, the sand preferably includes one or more of river sand, mountain sand and mountain flour, more preferably river sand, mountain sand or mountain flour, optimal
It is selected as river sand or mountain sand.In the present invention, the granularity of the sand is preferably 3.0~2.3mm, and gradation is preferably II grades, adds up sieve
Remaining percentage is preferably 41~70%.The present invention is conducive to the granularity for controlling sand and gradation to improve ameliorative mass concrete
Intensity, and meet its conveying and vibration compacting requirement.
In the present invention, on the basis of the mass fraction of rubble, the raw material packet of the ameliorative mass concrete is prepared
Include 180~220 parts of cement, preferably 180~214 parts, more preferably 180~202 parts.In the present invention, the cement is preferred
It more preferably include pozzolan cement, slag water including one or more of pozzolan cement, slag cements and pulverized fuel ash cement
Mud or pulverized fuel ash cement.In the present invention, the strength grade of the cement is preferably 42.5 grades.In the present invention, the cement
Type preferably include ordinary portland cement and/or portland slag cement, more preferably include ordinary portland cement or mine
Slag portland cement most preferably includes fish peak ordinary portland cement and/or Hongsuihe River ordinary portland cement.In the present invention
In, the preferred > 300m of the specific surface area of the cement2/kg；The granularity of the cement is preferably percentage < more than 80 μm of square hole screens
10% or 45 μm of square hole screens more than percentage < 30%.The present invention can guarantee ameliorative mass concrete using above-mentioned cement
Intensity, meet its conveying and vibration compacting requirement.
In the present invention, on the basis of the mass fraction of rubble, the raw material packet of the ameliorative mass concrete is prepared
Include 120~160 parts of flyash, preferably 136~160 parts, more preferably 140~160 parts.In the present invention, the flyash
Granularity be preferably 300~400 mesh, more preferably 350~400 mesh.In the present invention, flyash is made jointly with other raw materials
With with shape effect, active effect and micro aggregate effect, wherein shape effect is physical effect, and active effect is chemical effect
It answers, and the existing physical effect of micro aggregate effect has chemical effect, three kinds of effects are interrelated, complement one another.Specifically, form
Effect: due to the glass microballoon in coal ash containing 70% or more, particle shape is complete, and surface is smooth, and quality is fine and close, contains in flyash
This kind of form glass microballoon for concrete, water-reduction, compaction and homogeneous can be played the role of, promote initial stage water
The solution wadding of muddy water acts on, the multiple functions after changing the rheological equationm of state, initial configuration and the hardening of mix, especially to pumping
Concrete can play good lubricating action；Active effect: contain a large amount of activity SiO in flyash2And Al2O3, in humidity
In environment with the Ca (OH) in concrete2Equal alkaline matters chemically react, and generate the glue such as hydrated calcium silicate, drated calcium aluminate
Condensate matter can play humidification to powdered coal ash product and concrete and block the capillary structure in concrete, improve concrete
Resistance to corrosion；Micro aggregate effect: glass microballoon and clast containing partial size very little in flyash, in cement material quite
In unhydrated cement granules, superfine small glass microballoon is equivalent to active nano material, can significantly improve and enhances mixed
The structural strength of solidifying soil and product, improves homogeneity and compactness.The present invention both may be used by the dosage and granularity of control flyash
To improve the impermeability of concrete, and Sulfate corrosion resistance and anti-magnesium corrosion can be improved, to improve concrete
Durability.
In the present invention, on the basis of the mass fraction of rubble, the raw material packet of the ameliorative mass concrete is prepared
Include 19~23 parts of bentonite, preferably 19.4~23 parts, more preferably 19.8~23 parts.In the present invention, the bentonite is excellent
Choosing includes one or more of sodium bentonite, calcium and magnesium base bentonite and organobentonite, more preferably include sodium bentonite,
Calcium and magnesium base bentonite or organobentonite.In the present invention, bentonite consumption is excessive, although can delay mass concrete
Setting time, but the intensity of mass concrete can be reduced；Bentonite consumption is very few, does not have and hydration heat of concrete is delayed to release
The effect put reduces the effect for delaying to generate and discharge with the heat of hydration of balanced concrete；The bentonite of proper proportion is added,
The heat of hydration of mass concrete after can making solidification obtains delaying to generate and discharging, so that the temperature of mass concrete
It increasess slowly, not will cause heat of hydration undue concentration in Consolidation of Large-sized Concrete and discharge, large volume will not be caused mixed
Excessive temperature differentials in solidifying soil, and then mass concrete is avoided crack occur, the anti-permeability performance of mass concrete is improved, and
The bentonite of addition has filled up the gap of inside concrete, further compactness, impermeability and the durability for increasing concrete,
To improve the integral strength and whole synthesis quality of concrete.
In the present invention, on the basis of the mass fraction of rubble, the raw material packet of the ameliorative mass concrete is prepared
Include 6~9 parts of water-reducing agent, preferably 6.3~8.8 parts, more preferably 6.7~8 parts.In the present invention, the water-reducing agent includes more
Hydroxy compounds, hydroxycarboxylate, hydroxycarboxylic acid salt derivative, high sugared lignosulfonates, zinc chloride, borate and phosphate
One or more of, it more preferably include polyol, hydroxycarboxylate, hydroxycarboxylic acid salt derivative, high sugared lignin
Sulfonate, zinc chloride, borate or phosphate；Most preferably hydroxycarboxylate.In the present invention, water-reducing agent and other components are total
Same-action, play improve raw material dispersibility effect, while can improve concrete workability (including mobility, plasticity,
Stability and Yi Mixing) it transports so that the mass concrete of preparation meets and pours the mobility for smashing requirement, under external force
Brittle failure is not generated, layering and bleeding are not generated, is easy to pour puddling cause；It can be reduced unit consumption of water and unit cement consumption simultaneously,
Cement is saved, production cost is lowered.
In the present invention, on the basis of the mass fraction of rubble, the raw material packet of the ameliorative mass concrete is prepared
Include 165~175 parts of water, preferably 165~170 parts.
Ameliorative mass concrete provided by the invention greatly delays the aquation of concrete compared with normal concrete
The thermogenetic time avoids as normal concrete is due to excessively concentrating release in the short time heat of hydration, and influences the equal of concrete
Even contraction causes crack to concrete；Setting time is delayed simultaneously, the time has also been won in the processing of construction joint, significantly
Reduce staying for construction joint to set, to improve the pouring construction quality of mass concrete.With large volume in the prior art
Concrete is compared, and ameliorative mass concrete provided by the invention does not need mixed in large volume in the work progress in later period
The preparations such as cooled down, radiated native pouring construction early period are coagulated, also do not need to supervise temperature during pouring construction
It surveys, do not need more to reduce the temperature of inside concrete with recirculated cooling water again after the completion of pouring or is reduced with the mode of covering interior
The work such as the external temperature difference " dealing with problems arising from an accident ", greatly reduces construction cost.
The present invention also provides the preparation methods of ameliorative mass concrete described in above-mentioned technical proposal, including following step
It is rapid:
Rubble, sand and part water are stirred, wet mixing is obtained and closes aggregate；
Addition cement in aggregate is closed in the wet mixing to carry out making shell stirring, obtains the mixed material containing cement；
Addition bentonite, remaining water, flyash and water-reducing agent, which be gelatinized, in the mixed material containing cement stirs
It mixes, obtains ameliorative mass concrete.
In the present invention, the dosage of the part water is preferably the 65~75% of the total dosage of water, and more preferably 70%.At this
In invention, the time being stirred is preferably 10~20s, more preferably 12~18s, most preferably 15s.In the present invention
In, the time for making shell stirring is preferably 20~35s, more preferably 25~32s, most preferably 30s.In the present invention, institute
The time for stating gelatinization stirring is preferably 55~65s, more preferably 57~62s, most preferably 60s.The present invention is for the stirring
Mixing, make shell stirring and be gelatinized the mixing speed stirred does not have particular/special requirement, and guarantee material can be uniformly mixed.The present invention
Using above-mentioned charging sequence, be conducive to being sufficiently mixed for raw material, while being stirred by control, making shell stirring and gelatinization stirring
Mixing time, to improve the mechanical property of ameliorative mass concrete.
Below in conjunction with the embodiment in the present invention, the technical solution in the present invention is clearly and completely described.It is aobvious
So, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the reality in the present invention
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the scope of protection of the invention.
Embodiment 1
The raw material for preparing of every cubic metre of mass concrete includes rubble 916kg, sand 916kg, cement 214kg, flyash
152kg, bentonite 21kg, water-reducing agent 6.95kg and water 175kg.
15s is mixed in the water of rubble, sand and 70wt%, wet mixing is obtained and closes aggregate；It closes in aggregate and adds in the wet mixing
Enter cement mixing 30s, obtains the mixed material containing cement；Bentonite is added in the mixed material containing cement, remains
Yu Shui, flyash and water-reducing agent carry out gelatinization stirring 60s, obtain ameliorative mass concrete.
Embodiment 2~6
It is each in every cubic metre of mass concrete according to the preparation method preparation ameliorative mass concrete of embodiment 1
The dosage (kg) of raw material is shown in Table 1.
Reference examples 1~4
It is each in every cubic metre of mass concrete according to the preparation method preparation ameliorative mass concrete of embodiment 1
The dosage (kg) of raw material is shown in Table 1.
The dosage (kg) of each raw material in the every cubic metre of mass concrete of table 1
| Cement | Water | Sand | Rubble | Flyash | Bentonite | Water-reducing agent | |
| Embodiment 1 | 214 | 175 | 916 | 916 | 152 | 21 | 6.95 |
| Embodiment 2 | 180 | 165 | 923 | 930 | 160 | 23 | 8.71 |
| Embodiment 3 | 190 | 165 | 944 | 904 | 120 | 19.8 | 6.70 |
| Embodiment 4 | 185 | 165 | 934 | 917 | 140 | 21.4 | 7.7 |
| Embodiment 5 | 198 | 170 | 923 | 923 | 156 | 20.3 | 7.8 |
| Embodiment 6 | 202 | 170 | 910 | 910 | 136 | 19.4 | 6.8 |
| Reference examples 1 | 214 | 175 | 916 | 916 | 152 | 0 | 6.95 |
| Reference examples 2 | 180 | 165 | 923 | 930 | 160 | 0 | 8.71 |
| Reference examples 3 | 190 | 165 | 944 | 904 | 120 | 0 | 6.70 |
| Reference examples 4 | 185 | 170 | 934 | 917 | 140 | 0 | 7.7 |
Test case
According to national standard " mass concrete construction standard " (GB 50496-2018) to Examples 1 to 6 and reference examples 1~4
The mass concrete of preparation is tested for the property, wherein internal-external temperature difference is according to maximum temperature and appearance in concreting body
Temperature difference in face at 50mm is tested；Compactness is tested according to the core sample that the unbearable sampling of concrete structure measures；
Impermeability is tested according to concrete sample infiltration height；In heat of hydration release time shows according to thermometer in inspection hole
The outer temperature difference for 24 hours tested by zero variation；After mobility (slump) lifts according to slump cylinder, height that concrete voluntarily stays
It is tested.Each embodiment and reference examples preparation are detected according to GB/T 50107-2010 " Standard for inspection and assessment of strength of concrete "
Mass concrete 7 days compression strength (fcu.7d) and 28 days compression strength (fcu.28d).According to GB 1346-2001
" cement normal consistency water consumption, setting time, the stability method of inspection " tests presetting period and final setting time.According to GB/T
The durability of 50082-2009 integration test concrete.The above the performance test results are shown in Table 2.
2 the performance test results of table
Test result show ameliorative large volume provided by the invention improvement concrete set time is long, internal-external temperature difference is small,
Heat of hydration release length avoids mass concrete because the release of heat of hydration undue concentration causes its internal difference in temperature excessive and generates
Crack, while compression strength is high, compactness is big.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of ameliorative mass concrete, which is characterized in that be prepared by comprising the following components in parts by weight:
900~1100 parts of rubble；
780~950 parts of sand；
180~220 parts of cement；
120~160 parts of flyash；
19~23 parts of bentonite；
6~9 parts of water-reducing agent；
165~175 parts of water.
2. ameliorative mass concrete according to claim 1, which is characterized in that the granularity of the rubble be 5~
40mm。
3. ameliorative mass concrete according to claim 1, which is characterized in that the sand include river sand, mountain sand and
One or more of mountain flour；The granularity of the sand is 3.0~2.3mm, and gradation is II grades.
4. ameliorative mass concrete according to claim 1, which is characterized in that the strength grade of the cement is
42.5 grades, the type of the cement includes ordinary portland cement and/or portland slag cement.
5. ameliorative mass concrete according to claim 1 or 4, which is characterized in that the cement includes volcanic ash
One or more of cement, slag cements and pulverized fuel ash cement.
6. ameliorative mass concrete according to claim 1, which is characterized in that the granularity of the flyash is 300
~400 mesh.
7. ameliorative mass concrete according to claim 1, which is characterized in that the bentonite includes Na-bentonite
One or more of soil, calcium and magnesium base bentonite and organobentonite.
8. ameliorative mass concrete according to claim 1, which is characterized in that the water-reducing agent includes polyhydroxylated
Close one in object, hydroxycarboxylate, hydroxycarboxylic acid salt derivative, high sugared lignosulfonates, zinc chloride, borate and phosphate
Kind is several.
9. the preparation method of any one of the claim 1~8 ameliorative mass concrete, which is characterized in that including following
Step:
Rubble, sand and part water are stirred, wet mixing is obtained and closes aggregate；
Addition cement in aggregate is closed in the wet mixing to carry out making shell stirring, obtains the mixed material containing cement；
Bentonite, remaining water, flyash and water-reducing agent are added in the mixed material containing cement and carries out gelatinization stirring, obtains
To ameliorative mass concrete.
10. preparation method according to claim 9, which is characterized in that the dosage of the part water is the 65 of the total dosage of water
~75%；
The time being stirred is 10~20s；
The time for making shell stirring is 20~35s；
The time of the gelatinization stirring is 55~65s.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN115536328A (en) * | 2022-08-26 | 2022-12-30 | 海南瑞泽双林建材有限公司 | Foam concrete with high stability performance and preparation method thereof |
| CN115536328B (en) * | 2022-08-26 | 2023-08-11 | 海南瑞泽双林建材有限公司 | Foam concrete with high stability and preparation method thereof |
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