CN108863232A - A kind of winter construction match ratio improving concrete antifreezing performance - Google Patents
A kind of winter construction match ratio improving concrete antifreezing performance Download PDFInfo
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- CN108863232A CN108863232A CN201810840241.5A CN201810840241A CN108863232A CN 108863232 A CN108863232 A CN 108863232A CN 201810840241 A CN201810840241 A CN 201810840241A CN 108863232 A CN108863232 A CN 108863232A
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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
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of winter construction match ratios for improving concrete antifreezing performance, it is characterised in that：It using the raw material of following ratio (weight), is stirred evenly by concrete mixer, bulk density can reach 2350~2450kg/m3；Cement：320~340kg/m3；Sand：730~780kg/m3；Rubble：1110~1160kg/m3；Miberal powder：65~75kg/m3；High-efficiency water-reducing agent of poly-carboxylic acid：7.6~8.2kg/m3；Air entraining agent：0.039~0.041kg/m3；Antifreezing agent：19.5~20.5kg/m3；Water：156~164kg/m3.The present invention is able to solve winter construction concrete and does not endure cold, while can also improve the durability of concrete, to guarantee construction quality and service life.
Description
Technical field
The invention belongs to technical field of concrete, more particularly to a kind of suitable for northern area concreting in cold-weather
Improve the winter construction match ratio of concrete antifreezing performance.
Background technique
China is vast in territory, have it is sizable be partially in ice box, cause many hydraulic structures that freeze thawing has occurred
Breakoff phenomenon, the freeze-thaw damage of concrete are one of the main problem of building aging diseases, have seriously affected the length of building
Phase uses and is safely operated.The present invention provides a kind of concrete mix, when constructing in winter, both can guarantee that concrete winter applied
Work is not endured cold, while can improve the durability of concrete again, to guarantee construction quality and service life.
Summary of the invention
The present invention is to solve technical problem present in well-known technique and provide one kind and be able to solve winter construction concrete
It does not endure cold, while can also improve the durability of concrete, to guarantee the raising concrete frost resistance of construction quality and service life
The winter construction match ratio of energy.
The present invention is adopted the technical scheme that solve technical problem present in well-known technique：
A kind of winter construction match ratio improving concrete antifreezing performance, it is characterised in that：Following ratio is used by weight
Raw material, stirred evenly by concrete mixer, bulk density can reach 2350~2450kg/m3；Cement：320~
340kg/m3；Sand：730~780kg/m3；Rubble：1110~1160kg/m3；Miberal powder：65~75kg/m3；Polycarboxylic acids efficiently subtracts
Aqua：7.6~8.2kg/m3；Air entraining agent：0.039~0.041kg/m3；Antifreezing agent：19.5~20.5kg/m3；Water：156~
164kg/m3。
The present invention can also use following technical measures：
The cement uses strength grade for the early strong ordinary portland cement of P.O42.5；Cement specific surface area 300~
400m2/kg；Tricalcium aluminate content is 6%~12% in clinker；Cement dispatches from the factory the no more than 3 moon, and stability is closed
Lattice.
The sand uses river sand, and sand is middle sand of the fineness modulus between 2.6~3.0, and clay content is less than 3% in sand；Sand
Middle clod content is less than 0.5%.
The grain composition of the rubble is 5~31.5mm, and clay content is less than 0.7% in rubble；The crush index of rubble：
≤ 16%；The flat-elongated particles content (by mass)≤15% of rubble；Grain density >=2400kg/m of rubble3。
The rank of the miberal powder is S95 grades；The density of miberal powder is not less than 2800kg/m3；The specific surface area of miberal powder is not less than
400m2/kg；28 days activity indexs of miberal powder are not less than 105%；The loss on ignition of miberal powder is not greater than 3%.
The setting time difference of the polycarboxylate water-reducer is not less than+120min；The polycarboxylate water-reducer 1h slump≤40mm；
The water-reducing rate of polycarboxylate water-reducer is not less than 25%；The density of polycarboxylate water-reducer is in 1.10~1.15g/cm3；Polycarboxylic acids diminishing
The pH value of agent is 5~7.
The air entraining agent 1h air content ongoing change amount -1.5%~+1.5%；The setting time of air entraining agent poor -90~+
120min；28 compressive strength rates of air entraining agent：>=90%；Air content >=3% of air entraining agent；The bleeding rate ratio of air entraining agent≤
70%.
Air content >=2% in the antifreezing agent；The setting time of antifreezing agent poor -210~+210min；Antifreezing agent is -10
28 compressive strength rate >=90% under the conditions of DEG C；Antifreezing agent leads ratio≤100% in 50 freezing-thawing strength damages；Chlorine is free of in antifreezing agent
Salt acts on reinforcing bar non-corroding.
The wet concentration drinking water, the pH value > 5 of water；Chloride (in terms of Cl-) < 200mg/L in water；Sulfate in water
(in terms of SO42-) < 600mg/L.
The invention has the advantages and positive effects that：The present invention has the following advantages that by adopting the above technical scheme：1, originally
Invention is suitable for northern hydraulic engineering concreting in cold-weather.
2, the present invention is formed by mixture with certain mobility, concrete mixer truck transport can be used, directly
Enter mould or is pumped into mould.
3, the present invention uses high-early (strength) cement, can be improved early strength of concrete.
4, the present invention uses the biggish middle sand of fineness modulus, can reduce the cracking of concrete.
5, the present invention uses the continuous grading rubble of 5~31.5mm, can enhance the pumping of concrete.
6, the present invention mixes the miberal powder of certain dosage：
(1) cement consumption is reduced；
(2) improve the mobility of concrete；
(3) enhance the later strength of concrete；
7, the present invention mixes high-efficiency water-reducing agent of poly-carboxylic acid：
(1) it can reduce concrete water-cement ratio；
(2) it can reduce cement consumption；
(3) rheological characteristic and plasticity of concrete be can be improved；
(4) have and protect effect of collapsing, concrete slump loss is small；
8, the present invention mixes suitable air entraining agent：
(1) concrete antifreezing performance is significantly improved；
(2) workability of concrete can be improved；
(3) it can reduce the gradual loss of concrete slump；
(4) durability of concrete is improved；
9, the present invention mixes suitable antifreezing agent：
(1) it can reduce the freezing point of concrete；
(2) anti-freezing property of concrete is significantly improved；
10, the present invention, which passes through, extends concrete mixing time,
(1) various additives can be made to stir evenly；
(2) it can be improved the workability of concrete, convenient for construction.
Specific embodiment
It is described in detail such as in order to further understand the content, features and effects of the present invention, the following examples are hereby given
Under：
A kind of winter construction match ratio improving concrete antifreezing performance, using the raw material of following ratio (weight), warp
It crosses concrete mixer to stir evenly, bulk density can reach 2350~2450kg/m3；Cement：320~340kg/m3；Sand：730
~780kg/m3；Rubble：1110~1160kg/m3；Miberal powder：65~75kg/m3；High-efficiency water-reducing agent of poly-carboxylic acid：7.6~8.2kg/
m3；Air entraining agent：0.039~0.041kg/m3；Antifreezing agent：19.5~20.5kg/m3；Water：156~164kg/m3。
Preferably, the cement uses strength grade for the early strong ordinary portland cement of P.O42.5；Cement specific surface area
300~400m2/kg；Tricalcium aluminate content is 6%~12% in clinker；Cement dispatches from the factory the no more than 3 moon, and stabilizes
Property it is qualified.
Preferably, the sand uses river sand, and sand is middle sand of the fineness modulus between 2.6~3.0, and clay content is less than in sand
3%；Clod content is less than 0.5% in sand.
Preferably, the grain composition of the rubble is 5~31.5mm, and clay content is less than 0.7% in rubble；The pressure of rubble
Broken index：≤ 16%；The flat-elongated particles content (by mass)≤15% of rubble；Grain density >=2400kg/m of rubble3。
Preferably, the rank of the miberal powder is S95 grades；The density of miberal powder is not less than 2800kg/m3；The specific surface area of miberal powder
Not less than 400m2/kg；28 days activity indexs of miberal powder are not less than 105%；The loss on ignition of miberal powder is not greater than 3%.
Preferably, the setting time difference of the polycarboxylate water-reducer is not less than+120min；The polycarboxylate water-reducer 1h slump
≤40mm；The water-reducing rate of polycarboxylate water-reducer is not less than 25%；The density of polycarboxylate water-reducer is in 1.10~1.15g/cm3；It is poly-
The pH value of carboxylic acid water reducer is 5~7.
Preferably, the air entraining agent 1h air content ongoing change amount -1.5%~+1.5%；The setting time of air entraining agent is poor-
90~+120min；28 compressive strength rates of air entraining agent：>=90%；Air content >=3% of air entraining agent；The bleeding rate ratio of air entraining agent
≤ 70%.
Preferably, air content >=2% in the antifreezing agent；The setting time of antifreezing agent poor -210~+210min；It is antifreeze
Agent 28 compressive strength rate >=90% under the conditions of -10 DEG C；Antifreezing agent leads ratio≤100% in 50 freezing-thawing strength damages；Antifreezing agent
In be free of villaumite, to reinforcing bar non-corroding act on.
Preferably, the wet concentration drinking water, the pH value > 5 of water；Chloride (in terms of Cl-) < 200mg/L in water；In water
Sulfate (in terms of SO42-) < 600mg/L.
Now in conjunction with engineering test example 1 (area Dongying Port Guang Ligang engineering), that the present invention will be further described is as follows：It applies
The match ratio (winter, laboratory outdoor temperature -9) that working hour uses
Now in conjunction with engineering test example 2 (Dongying Port engineering), that the present invention will be further described is as follows：It is used when construction
Match ratio
Now in conjunction with engineering test example 3 (PORT OF TIANJIN engineering), that the present invention will be further described is as follows：It is used when construction
Match ratio
By adopting the above technical scheme, the present invention has the following advantages that：
1, the present invention is suitable for northern hydraulic engineering concreting in cold-weather.
2, the present invention is formed by mixture with certain mobility, concrete mixer truck transport can be used, directly
Enter mould or is pumped into mould.
3, the present invention uses high-early (strength) cement, can be improved early strength of concrete.
4, the present invention uses the biggish middle sand of fineness modulus, can reduce the cracking of concrete.
5, the present invention uses the continuous grading rubble of 5~31.5mm, can enhance the pumping of concrete.
6, the present invention mixes the miberal powder of certain dosage：
(1) cement consumption is reduced；
(2) improve the mobility of concrete；
(3) enhance the later strength of concrete；
7, the present invention mixes high-efficiency water-reducing agent of poly-carboxylic acid：
(1) it can reduce concrete water-cement ratio；
(2) it can reduce cement consumption；
(3) rheological characteristic and plasticity of concrete be can be improved；
(4) have and protect effect of collapsing, concrete slump loss is small；
8, the present invention mixes suitable air entraining agent：
(1) concrete antifreezing performance is significantly improved；
(2) workability of concrete can be improved；
(3) it can reduce the gradual loss of concrete slump；
(4) durability of concrete is improved；
9, the present invention mixes suitable antifreezing agent：
(1) it can reduce the freezing point of concrete；
(2) anti-freezing property of concrete is significantly improved；
10, the present invention, which passes through, extends concrete mixing time,
(1) various additives can be made to stir evenly；
(2) it can be improved the workability of concrete, convenient for construction.
The above is only the preferred embodiments of the present invention, and is not intended to limit the present invention in any form,
Any simple modification made to the above embodiment according to the technical essence of the invention, equivalent variations and modification, belong to
In the range of technical solution of the present invention.
Claims (9)
1. a kind of winter construction match ratio for improving concrete antifreezing performance, it is characterised in that：By weight using following ratio
Raw material are stirred evenly by concrete mixer, and bulk density can reach 2350~2450kg/m3；Cement：320~
340kg/m3；Sand：730~780kg/m3；Rubble：1110~1160kg/m3；Miberal powder：65~75kg/m3；Polycarboxylic acids efficiently subtracts
Aqua：7.6~8.2kg/m3；Air entraining agent：0.039~0.041kg/m3；Antifreezing agent：19.5~20.5kg/m3；Water：156~
164kg/m3。
2. the winter construction match ratio according to claim 1 for improving concrete antifreezing performance, it is characterised in that：The water
Mud uses strength grade for the early strong ordinary portland cement of P.O42.5；300~400m2/kg of cement specific surface area；Clinker
Middle tricalcium aluminate content is 6%~12%；Cement dispatches from the factory the no more than 3 moon, and stability is qualified.
3. the winter construction match ratio according to claim 1 for improving concrete antifreezing performance, it is characterised in that：The sand
Using river sand, sand is middle sand of the fineness modulus between 2.6~3.0, and clay content is less than 3% in sand；Clod content is less than in sand
0.5%.
4. the winter construction match ratio according to claim 1 for improving concrete antifreezing performance, it is characterised in that：Described
The grain composition of rubble is 5~31.5mm, and clay content is less than 0.7% in rubble；The crush index of rubble：≤ 16%；Rubble
Flat-elongated particles content (by mass)≤15%；Grain density >=2400kg/m3 of rubble.
5. the winter construction match ratio according to claim 1 for improving concrete antifreezing performance, it is characterised in that：The mine
The rank of powder is S95 grades；The density of miberal powder is not less than 2800kg/m3；The specific surface area of miberal powder is not less than 400m2/kg；Miberal powder 28
Its activity index is not less than 105%；The loss on ignition of miberal powder is not greater than 3%.
6. the winter construction match ratio according to claim 1 for improving concrete antifreezing performance, it is characterised in that：It is described poly-
The setting time difference of carboxylic acid water reducer is not less than+120min；The polycarboxylate water-reducer 1h slump≤40mm；Polycarboxylate water-reducer
Water-reducing rate is not less than 25%；The density of polycarboxylate water-reducer is in 1.10~1.15g/cm3；The pH value of polycarboxylate water-reducer be 5~
7。
7. the winter construction match ratio according to claim 1 for improving concrete antifreezing performance, it is characterised in that：It is described to draw
Gas agent 1h air content ongoing change amount -1.5%~+1.5%；The setting time of air entraining agent poor -90~+120min；Air entraining agent
28 compressive strength rates：>=90%；Air content >=3% of air entraining agent；Bleeding rate ratio≤70% of air entraining agent.
8. the winter construction match ratio according to claim 1 for improving concrete antifreezing performance, it is characterised in that：It is described anti-
Freeze air content >=2% in agent；The setting time of antifreezing agent poor -210~+210min；Antifreezing agent 28 resistance to compressions under the conditions of -10 DEG C
Intensity ratio >=90%；Antifreezing agent leads ratio≤100% in 50 freezing-thawing strength damages；Villaumite is free of in antifreezing agent, it is rustless to reinforcing bar
Erosion effect.
9. the winter construction match ratio according to claim 1 for improving concrete antifreezing performance, it is characterised in that：The water
Select drinking water, the pH value > 5 of water；Chloride (in terms of Cl-) < 200mg/L in water；Sulfate (in terms of SO42-) < in water
600mg/L。
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Cited By (6)
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| CN109456015A (en) * | 2019-01-10 | 2019-03-12 | 中铁十八局集团有限公司 | A kind of concrete for cryogenic spray |
| CN109574598A (en) * | 2019-01-29 | 2019-04-05 | 山东承坤信息科技有限公司 | A kind of preparation process of environment-friendlydurable durable construction material |
| CN109796160A (en) * | 2019-03-16 | 2019-05-24 | 北京合力源混凝土有限公司 | Frost-resistant concrete and preparation method thereof |
| CN110143769A (en) * | 2019-05-06 | 2019-08-20 | 科利尔环保科技有限责任公司 | A kind of match ratio improving celluar concrete freezing and thawing performance |
| CN112174598A (en) * | 2020-09-09 | 2021-01-05 | 上海建工一建集团有限公司 | Anti-freezing concrete and preparation method thereof |
| CN114166690A (en) * | 2021-12-06 | 2022-03-11 | 常德新鑫环保墙体材料有限公司 | Concrete mixture unit weight detection device |
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| CN109456015A (en) * | 2019-01-10 | 2019-03-12 | 中铁十八局集团有限公司 | A kind of concrete for cryogenic spray |
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| CN112174598A (en) * | 2020-09-09 | 2021-01-05 | 上海建工一建集团有限公司 | Anti-freezing concrete and preparation method thereof |
| CN114166690A (en) * | 2021-12-06 | 2022-03-11 | 常德新鑫环保墙体材料有限公司 | Concrete mixture unit weight detection device |
| CN114166690B (en) * | 2021-12-06 | 2023-09-26 | 临沂市三财混凝土有限公司 | Concrete mixture volume weight detection device |
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