CN106927736A - A kind of high-strength environment-friendly concrete and preparation method thereof - Google Patents
A kind of high-strength environment-friendly concrete and preparation method thereof Download PDFInfo
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- CN106927736A CN106927736A CN201710119068.5A CN201710119068A CN106927736A CN 106927736 A CN106927736 A CN 106927736A CN 201710119068 A CN201710119068 A CN 201710119068A CN 106927736 A CN106927736 A CN 106927736A
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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
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
Abstract
The invention discloses a kind of high-strength environment-friendly concrete and preparation method thereof, including following parts by weight raw material：150 230 parts of cement, 300 450 parts of sand, 1,500 1600 parts of rubble, 170 200 parts of water, 8 12 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 150 250 parts of complex mineral blending material, 18 55 parts of diatomite, 12 20 parts of sepiolite powder.The high-strength environment-friendly concrete has the advantages that compression strength is high, raw material is easy to get, material toxicity is small, more environmentally-friendly；And the high-strength environment-friendly preparation method of concrete is simple, production cost is relatively low, better economy；And concrete 14d self-shrinking values are less than 5/10000ths；In addition, the high-strength environment-friendly concrete preparation condition is relatively low, range of application is wider, and market popularization value is preferable.
Description
Technical field
The present invention relates to concrete field, specifically a kind of high-strength environment-friendly concrete and preparation method thereof.
Background technology
Concrete as a kind of construction material, due to construction is simple, intensity high, good stability, good endurance, maintenance
Low cost and other advantages, are widely applied in building field.In recent years, it is and right as country is to a large amount of inputs for building
Project delivery method requirement is improved constantly, and the intensity to concrete it is also proposed requirement higher.Therefore, high intensity is researched and developed
Concrete to meet high-quality construction project the need for turn into this area be badly in need of solve technical barrier.
Existing concrete adds multiple additives to meet multiple performance requirement, and the raw material of use is not easy to obtain, and
And material toxicity is larger, the feature of environmental protection is poor；Other preparation method is complex, causes production cost higher, and economy is poor.Cause
This, the present invention provides simple a kind of high intensity, preparation method, low production cost, good economy performance, small toxicity, more environmentally-friendly mixed
Solidifying soil.
The content of the invention
It is an object of the invention to provide a kind of high-strength environment-friendly concrete and preparation method thereof, to solve above-mentioned background skill
The problem proposed in art.
To achieve the above object, the present invention provides following technical scheme：
A kind of high-strength environment-friendly concrete, including following parts by weight raw material：Cement 150-230 parts, sand 300-450 parts, it is broken
Stone 1500-1600 parts, water 170-200 parts, high-efficiency water-reducing agent of poly-carboxylic acid 8-12 parts, complex mineral blending material 150-250 parts, diatom
It is native 18-55 parts, sepiolite powder 12-20 parts；
The complex mineral blending material includes the raw material of following parts by weight：Zinc chloride 11-23 parts, the propylene triamine 2- of pentamethyl two
15 parts, string 20-80 parts, melon-seed hull 35-44 parts, charcoal powder 10-45 parts, ABS plastic 42-78 parts, fatty alcohol polyoxy second
10-26 parts of alkene ether ammonium sulfate, 13-19 parts of octadecadienoic acid methyl esters.
As further scheme of the invention：Raw material including following parts by weight：Cement 172-218 parts, sand 375-421
Part, rubble 1542-1589 parts, water 187-196 parts, high-efficiency water-reducing agent of poly-carboxylic acid 10-11 parts, complex mineral blending material 185-223
Part, diatomite 24-43 parts, sepiolite powder 16-18 parts；
The complex mineral blending material includes the raw material of following parts by weight：Zinc chloride 16-20 parts, the propylene triamine 5- of pentamethyl two
11 parts, string 22-65 parts, melon-seed hull 39-42 parts, charcoal powder 24-38 parts, ABS plastic 57-69 parts, fatty alcohol polyoxy second
18-23 parts of alkene ether ammonium sulfate, 15-17 parts of octadecadienoic acid methyl esters.
A kind of preparation method of high-strength environment-friendly concrete, specific steps include：
（1）Prepare complex mineral blending material：String, melon-seed hull are put into first 160-200 purposes are ground into pulverizer
Powder, obtains mixed-powder, standby；Then zinc chloride, ABS plastic, charcoal powder and above-mentioned mixed-powder are well mixed,
Mixing 0.6-1.1h is stirred at a temperature of 45-65 DEG C, octadecadienoic acid methyl esters is added, 70-80 DEG C, stirring mixing 1.8- is warming up to
2.3 hours, less than 70 DEG C are subsequently cooled to, add the propylene triamine of pentamethyl two and AESA, stirring
Mixing 1.1-1.8h, then heats to 105-125 DEG C, boosts to 21-24Mpa, keeps this HTHP 2-5h, finally cooling drop
Normal temperature and pressure is depressed into, complex mineral blending material is obtained；
（2）Sand and rubble are smashed into rear and cement mixing, the water of the 40-60% of high-efficiency water-reducing agent of poly-carboxylic acid and total amount, stirring is added
Uniformly；
（3）The water of diatomite, sepiolite powder and surplus is mixed, mixing 0.8-1.1h is stirred at a temperature of 75-80 DEG C, mixed
Close slurry；
（4）By complex mineral blending material and step（2）Gains, step（3）The mixed slurry for obtaining is well mixed, stirring reaction
30-50min；
（5）Pour, conserve：Poured as needed using upper step gains, then conserved 2-8 days in the environment of 1-3 DEG C,
Obtain final product.
As further scheme of the invention：Step（1）Prepare complex mineral blending material：First by string, melon seeds
Skin is put into pulverizer the powder for being ground into 180 mesh, obtains mixed-powder, standby；Then by zinc chloride, ABS plastic, charcoal powder
It is well mixed with above-mentioned mixed-powder, mixing 0.8h is stirred at a temperature of 58 DEG C, octadecadienoic acid methyl esters is added, it is warming up to 77
DEG C, stirring mixing 2.1 hours is subsequently cooled to less than 70 DEG C, adds the propylene triamine of pentamethyl two and AEO
Ammonium sulfate, stirring mixing 1.5h, then heats to 113 DEG C, boosts to 22Mpa, keeps this HTHP 2.8h, finally cooling drop
Normal temperature and pressure is depressed into, complex mineral blending material is obtained.
As further scheme of the invention：Step（2）Sand and rubble are smashed into rear and cement mixing, adds polycarboxylic acids high
The 55% of water reducer and total amount water is imitated, is stirred.
As further scheme of the invention：Step（3）The water of diatomite, sepiolite powder and surplus is mixed, at 77 DEG C
At a temperature of stir mixing 0.9h, obtain mixed slurry.
Compared with prior art, the beneficial effects of the invention are as follows：
The high-strength environment-friendly concrete has the advantages that compression strength is high, raw material is easy to get, material toxicity is small, more environmentally-friendly；And should
High-strength environment-friendly preparation method of concrete is simple, and production cost is relatively low, better economy；And concrete 14d self-shrinking values are small
In 5/10000ths；In addition, the high-strength environment-friendly concrete preparation condition is relatively low, range of application is wider, and market popularization value is preferable.
Specific embodiment
The technical scheme of this patent is described in more detail with reference to specific embodiment.
Embodiment 1
A kind of high-strength environment-friendly concrete, including following parts by weight raw material：150 parts of cement, 300 parts of sand, 1500 parts of rubble,
170 parts of water, 8 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 150 parts of complex mineral blending material, 18 parts of diatomite, 12 parts of sepiolite powder；
The complex mineral blending material includes the raw material of following parts by weight：11 parts of zinc chloride, 2 parts of two propylene triamine of pentamethyl,
20 parts of string, 35 parts of melon-seed hull, 10 parts of charcoal powder, 42 parts of ABS plastic, 10 parts of AESA, ten
Eight 13 parts of carbon dienoic acid methyl esters.
A kind of preparation method of high-strength environment-friendly concrete, specific steps include：
（1）Prepare complex mineral blending material：String, melon-seed hull are put into pulverizer the powder for being ground into 160 mesh first,
Mixed-powder is obtained, it is standby；Then zinc chloride, ABS plastic, charcoal powder and above-mentioned mixed-powder are well mixed, in 45 DEG C of temperature
The lower stirring mixing 0.6h of degree, adds octadecadienoic acid methyl esters, is warming up to 70 DEG C, and stirring mixing 1.8 hours is subsequently cooled to 70
Below DEG C, the propylene triamine of pentamethyl two and AESA, stirring mixing 1.1h is added to then heat to
105 DEG C, boost to 21Mpa, keep this HTHP 2h, last decrease temperature and pressure obtains complex mineral blending material to normal temperature and pressure；
（2）Sand and rubble are smashed into rear and cement mixing, the 40% of high-efficiency water-reducing agent of poly-carboxylic acid and total amount water is added, stirring is equal
It is even；
（3）The water of diatomite, sepiolite powder and surplus is mixed, mixing 0.8h is stirred at a temperature of 75 DEG C, obtain mixed slurry；
（4）By complex mineral blending material and step（2）Gains, step（3）The mixed slurry for obtaining is well mixed, stirring reaction
30min；
（5）Pour, conserve：Poured as needed using upper step gains, then maintenance 2 days in the environment of 1 DEG C, i.e.,
.
Embodiment 2
A kind of high-strength environment-friendly concrete, including following parts by weight raw material：230 parts of cement, 450 parts of sand, 1600 parts of rubble,
200 parts of water, 12 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 250 parts of complex mineral blending material, 55 parts of diatomite, 20 parts of sepiolite powder；
The complex mineral blending material includes the raw material of following parts by weight：23 parts of zinc chloride, 15 parts of two propylene triamine of pentamethyl,
80 parts of string, 44 parts of melon-seed hull, 45 parts of charcoal powder, 78 parts of ABS plastic, 26 parts of AESA, ten
Eight 19 parts of carbon dienoic acid methyl esters.
A kind of preparation method of high-strength environment-friendly concrete, specific steps include：
（1）Prepare complex mineral blending material：String, melon-seed hull are put into pulverizer the powder for being ground into 200 mesh first,
Mixed-powder is obtained, it is standby；Then zinc chloride, ABS plastic, charcoal powder and above-mentioned mixed-powder are well mixed, in 65 DEG C of temperature
The lower stirring mixing 1.1h of degree, adds octadecadienoic acid methyl esters, is warming up to 80 DEG C, and stirring mixing 2.3 hours is subsequently cooled to 70
Below DEG C, the propylene triamine of pentamethyl two and AESA, stirring mixing 1.8h is added to then heat to
125 DEG C, boost to 24Mpa, keep this HTHP 5h, last decrease temperature and pressure obtains complex mineral blending material to normal temperature and pressure；
（2）Sand and rubble are smashed into rear and cement mixing, the 60% of high-efficiency water-reducing agent of poly-carboxylic acid and total amount water is added, stirring is equal
It is even；
（3）The water of diatomite, sepiolite powder and surplus is mixed, mixing 1.1h is stirred at a temperature of 80 DEG C, obtain mixed slurry；
（4）By complex mineral blending material and step（2）Gains, step（3）The mixed slurry for obtaining is well mixed, stirring reaction
50min；
（5）Pour, conserve：Poured as needed using upper step gains, then maintenance 8 days in the environment of 3 DEG C, i.e.,
.
Embodiment 3
A kind of high-strength environment-friendly concrete, including following parts by weight raw material：172 parts of cement, 375 parts of sand, 1542 parts of rubble,
187 parts of water, 10 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 185 parts of complex mineral blending material, 24 parts of diatomite, 16 parts of sepiolite powder；
The complex mineral blending material includes the raw material of following parts by weight：16 parts of zinc chloride, 5 parts of two propylene triamine of pentamethyl,
22 parts of string, 39 parts of melon-seed hull, 24 parts of charcoal powder, 57 parts of ABS plastic, 18 parts of AESA, ten
Eight 15 parts of carbon dienoic acid methyl esters.
A kind of preparation method of high-strength environment-friendly concrete, specific steps include：
（1）Prepare complex mineral blending material：String, melon-seed hull are put into pulverizer the powder for being ground into 180 mesh first,
Mixed-powder is obtained, it is standby；Then zinc chloride, ABS plastic, charcoal powder and above-mentioned mixed-powder are well mixed, in 58 DEG C of temperature
The lower stirring mixing 0.8h of degree, adds octadecadienoic acid methyl esters, is warming up to 77 DEG C, and stirring mixing 2.1 hours is subsequently cooled to 70
Below DEG C, the propylene triamine of pentamethyl two and AESA, stirring mixing 1.5h is added to then heat to
113 DEG C, boost to 22Mpa, keep this HTHP 2.8h, last decrease temperature and pressure to normal temperature and pressure, obtain complex mineral blending
Material；
（2）Sand and rubble are smashed into rear and cement mixing, the 55% of high-efficiency water-reducing agent of poly-carboxylic acid and total amount water is added, stirring is equal
It is even；
（3）The water of diatomite, sepiolite powder and surplus is mixed, mixing 0.9h is stirred at a temperature of 77 DEG C, obtain mixed slurry；
（4）By complex mineral blending material and step（2）Gains, step（3）The mixed slurry for obtaining is well mixed, stirring reaction
30-50min；
（5）Pour, conserve：Poured as needed using upper step gains, then conserved 2-8 days in the environment of 1-3 DEG C,
Obtain final product.
Embodiment 4
A kind of high-strength environment-friendly concrete, including following parts by weight raw material：218 parts of cement, 421 parts of sand, 1589 parts of rubble,
196 parts of water, 11 parts of high-efficiency water-reducing agent of poly-carboxylic acid, 223 parts of complex mineral blending material, 43 parts of diatomite, 18 parts of sepiolite powder；
The complex mineral blending material includes the raw material of following parts by weight：20 parts of zinc chloride, 11 parts of two propylene triamine of pentamethyl,
65 parts of string, 42 parts of melon-seed hull, 38 parts of charcoal powder, 69 parts of ABS plastic, 23 parts of AESA, ten
Eight 17 parts of carbon dienoic acid methyl esters.
A kind of preparation method of high-strength environment-friendly concrete, specific steps include：
（1）Prepare complex mineral blending material：String, melon-seed hull are put into pulverizer the powder for being ground into 170 mesh first,
Mixed-powder is obtained, it is standby；Then zinc chloride, ABS plastic, charcoal powder and above-mentioned mixed-powder are well mixed, in 52 DEG C of temperature
The lower stirring mixing 0.8h of degree, adds octadecadienoic acid methyl esters, is warming up to 72 DEG C, and stirring mixing 1.9 hours is subsequently cooled to 70
Below DEG C, the propylene triamine of pentamethyl two and AESA, stirring mixing 1.3h is added to then heat to
120 DEG C, boost to 23Mpa, keep this HTHP 4.3h, last decrease temperature and pressure to normal temperature and pressure, obtain complex mineral blending
Material；
（2）Sand and rubble are smashed into rear and cement mixing, the 44% of high-efficiency water-reducing agent of poly-carboxylic acid and total amount water is added, stirring is equal
It is even；
（3）The water of diatomite, sepiolite powder and surplus is mixed, mixing 1h is stirred at a temperature of 78 DEG C, obtain mixed slurry；
（4）By complex mineral blending material and step（2）Gains, step（3）The mixed slurry for obtaining is well mixed, stirring reaction
48min；
（5）Pour, conserve：Poured as needed using upper step gains, then conserved 7.5 days in the environment of 1-3 DEG C,
Obtain final product.
And cement described in embodiment 1-4 is Portland cement of the strength grade more than or equal to 42.5, its Bo Shibibiao
Face is more than or equal to 325m2/kg；Described sand is artificial sand, meets the regulation of I class sand in GB/T14684-2001；The rubble
Particle diameter be 8-28mm, crush values≤10%, pin, sheet-like particle content≤10%, remaining item meet GB/T14685-2001
Regulation.
100mm × 100mm × 100mm cube concrete strengths to pouring are measured, and the results are shown in Table shown in 1：
The concrete strength measurement result of table 1
As shown in Table 1, the 60d compression strength of the body concrete of the 100mm × 100mm × 100mm cubes is between 150-170MPa,
Between 125-140MPa, concrete 14d self-shrinking values are less than 5/10000ths to 28d compression strength.
The high-strength environment-friendly concrete has the advantages that compression strength is high, raw material is easy to get, material toxicity is small, more environmentally-friendly；
And the high-strength environment-friendly preparation method of concrete is simple, production cost is relatively low, better economy；And concrete 14d self-constrictions
Value is less than 5/10000ths；In addition, the high-strength environment-friendly concrete preparation condition is relatively low, range of application is wider, market popularization value
Preferably.
The better embodiment to this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party
Formula, in the ken that one skilled in the relevant art possesses, can also be on the premise of this patent objective not be departed from
Make a variety of changes.
Claims (6)
1. a kind of high-strength environment-friendly concrete, it is characterised in that the raw material including following parts by weight：Cement 150-230 parts, sand
300-450 parts, rubble 1500-1600 parts, water 170-200 parts, high-efficiency water-reducing agent of poly-carboxylic acid 8-12 parts, complex mineral blending material
150-250 parts, diatomite 18-55 parts, sepiolite powder 12-20 parts；
The complex mineral blending material includes the raw material of following parts by weight：Zinc chloride 11-23 parts, the propylene triamine 2- of pentamethyl two
15 parts, string 20-80 parts, melon-seed hull 35-44 parts, charcoal powder 10-45 parts, ABS plastic 42-78 parts, fatty alcohol polyoxy second
10-26 parts of alkene ether ammonium sulfate, 13-19 parts of octadecadienoic acid methyl esters.
2. high-strength environment-friendly concrete according to claim 1, it is characterised in that the raw material including following parts by weight：
Cement 172-218 parts, sand 375-421 parts, rubble 1542-1589 parts, water 187-196 parts, high-efficiency water-reducing agent of poly-carboxylic acid 10-11
Part, complex mineral blending material 185-223 parts, diatomite 24-43 parts, sepiolite powder 16-18 parts；
The complex mineral blending material includes the raw material of following parts by weight：Zinc chloride 16-20 parts, the propylene triamine 5- of pentamethyl two
11 parts, string 22-65 parts, melon-seed hull 39-42 parts, charcoal powder 24-38 parts, ABS plastic 57-69 parts, fatty alcohol polyoxy second
18-23 parts of alkene ether ammonium sulfate, 15-17 parts of octadecadienoic acid methyl esters.
3. a kind of preparation method of high-strength environment-friendly concrete as described in claim 1-2 is any, it is characterised in that specific step
Suddenly include：
（1）Prepare complex mineral blending material：String, melon-seed hull are put into first 160-200 purposes are ground into pulverizer
Powder, obtains mixed-powder, standby；Then zinc chloride, ABS plastic, charcoal powder and above-mentioned mixed-powder are well mixed,
Mixing 0.6-1.1h is stirred at a temperature of 45-65 DEG C, octadecadienoic acid methyl esters is added, 70-80 DEG C, stirring mixing 1.8- is warming up to
2.3 hours, less than 70 DEG C are subsequently cooled to, add the propylene triamine of pentamethyl two and AESA, stirring
Mixing 1.1-1.8h, then heats to 105-125 DEG C, boosts to 21-24Mpa, keeps this HTHP 2-5h, finally cooling drop
Normal temperature and pressure is depressed into, complex mineral blending material is obtained；
（2）Sand and rubble are smashed into rear and cement mixing, the water of the 40-60% of high-efficiency water-reducing agent of poly-carboxylic acid and total amount, stirring is added
Uniformly；
（3）The water of diatomite, sepiolite powder and surplus is mixed, mixing 0.8-1.1h is stirred at a temperature of 75-80 DEG C, mixed
Close slurry；
（4）By complex mineral blending material and step（2）Gains, step（3）The mixed slurry for obtaining is well mixed, stirring reaction
30-50min；
（5）Pour, conserve：Poured as needed using upper step gains, then conserved 2-8 days in the environment of 1-3 DEG C,
Obtain final product.
4. the preparation method of high-strength environment-friendly concrete according to claim 3, it is characterised in that step（1）Prepare multiple
Close mineral admixture：String, melon-seed hull are put into pulverizer the powder for being ground into 180 mesh first, mixed-powder is obtained,
It is standby；Then zinc chloride, ABS plastic, charcoal powder and above-mentioned mixed-powder are well mixed, mixing is stirred at a temperature of 58 DEG C
0.8h, adds octadecadienoic acid methyl esters, is warming up to 77 DEG C, and stirring mixing 2.1 hours is subsequently cooled to less than 70 DEG C, adds
The propylene triamine of pentamethyl two and AESA, stirring mixing 1.5h, then heat to 113 DEG C, boost to
22Mpa, keeps this HTHP 2.8h, and last decrease temperature and pressure obtains complex mineral blending material to normal temperature and pressure.
5. the preparation method of high-strength environment-friendly concrete according to claim 3, it is characterised in that step（2）By sand and
Rubble smashes rear and cement mixing, adds the 55% of high-efficiency water-reducing agent of poly-carboxylic acid and total amount water, stirs.
6. the preparation method of high-strength environment-friendly concrete according to claim 3, it is characterised in that step（3）By diatom
The water mixing of soil, sepiolite powder and surplus, stirs mixing 0.9h at a temperature of 77 DEG C, obtains mixed slurry.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111187054A (en) * | 2020-03-25 | 2020-05-22 | 安徽虹达道路桥梁工程有限公司 | Pavement concrete for municipal building engineering |
| CN112299790A (en) * | 2020-11-13 | 2021-02-02 | 上海百基混凝土有限公司 | Environment-friendly high-performance concrete and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111187054A (en) * | 2020-03-25 | 2020-05-22 | 安徽虹达道路桥梁工程有限公司 | Pavement concrete for municipal building engineering |
| CN111187054B (en) * | 2020-03-25 | 2022-01-07 | 安徽虹达道路桥梁工程有限公司 | Pavement concrete for municipal building engineering |
| CN112299790A (en) * | 2020-11-13 | 2021-02-02 | 上海百基混凝土有限公司 | Environment-friendly high-performance concrete and preparation method thereof |
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Application publication date: 20170707 |