CN108002765B - C30P16 expansive fiber concrete preparation and concrete construction process - Google Patents
C30P16 expansive fiber concrete preparation and concrete construction process Download PDFInfo
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- CN108002765B CN108002765B CN201711498411.8A CN201711498411A CN108002765B CN 108002765 B CN108002765 B CN 108002765B CN 201711498411 A CN201711498411 A CN 201711498411A CN 108002765 B CN108002765 B CN 108002765B
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- 239000000835 fiber Substances 0.000 title claims abstract description 22
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title description 4
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 24
- 239000004575 stone Substances 0.000 claims abstract description 12
- 239000004576 sand Substances 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 claims abstract description 9
- 239000010881 fly ash Substances 0.000 claims abstract description 9
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 5
- 239000003995 emulsifying agent Substances 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 229920001732 Lignosulfonate Polymers 0.000 claims description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- 239000005018 casein Substances 0.000 claims description 3
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 claims description 3
- 235000021240 caseins Nutrition 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 3
- DCNHVBSAFCNMBK-UHFFFAOYSA-N naphthalene-1-sulfonic acid;hydrate Chemical compound O.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 DCNHVBSAFCNMBK-UHFFFAOYSA-N 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000012229 microporous material Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 6
- 239000011230 binding agent Substances 0.000 abstract description 2
- 230000000740 bleeding effect Effects 0.000 abstract description 2
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920005594 polymer fiber Polymers 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- 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
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to C30P16 expansive fiber concrete and a concrete construction process, which comprises water, cement, fly ash, sand, broken stone, a water reducing agent, an expanding agent, a waterproof agent and fibers. The concrete disclosed in the scheme mainly comprises substances such as water, cement, fly ash, sand, broken stone, a water reducing agent, an expanding agent, a waterproof agent, fibers and the like, wherein the substances such as the sand and the broken stone are used as concrete aggregates, the cement and the fly ash are fine powder with fine quality and can be used as a binder after being mixed with water, the two substances have the effects of adjusting workability and inhibiting bleeding and the like, the expanding agent added into the two substances is used for filling pores and cavities of the concrete, the multiple substances act simultaneously to enhance the impermeability of the concrete, and the impermeability of the concrete prepared in the scheme is higher than that of P16.
Description
Technical Field
The invention relates to a concrete formula and a construction process, in particular to a C30P16 expansive fiber concrete preparation and concrete construction process.
Background
In modern buildings, along with the development of building technology and international macroscopic adjustment, urban land utilization is more and more tense, and related construction technologies such as super high buildings, deep pit basements and the like are more and more common in the modern times; the foundation pit is an important foundation of a high-rise building, the deeper and deeper the foundation pit is, the larger and larger the foundation pit is, and the anti-permeability grade of the raft plate is required to be higher and higher for the construction of the whole building.
The raft plate is composed of a bottom plate, a beam and the like. The building load is bigger, the foundation bearing capacity is weaker, the concrete bottom plate raft plate is often adopted to bear the building load, the raft foundation is formed, the integrity is good, and the uneven settlement of the foundation can be well resisted.
The raft type is also called as raft plate type foundation, namely full foundation. The independent foundations or strip foundations under the columns are all connected by beams, and then the bottom plate is integrally cast. The raft foundation is divided into a flat plate type raft foundation and a beam plate type raft foundation, and the flat plate type raft foundation supports a locally thickened raft type; the beam-slab raft foundation supports two forms of upper flat and lower flat of the rib beam. Generally, raft type foundations are used when the bearing capacity of the foundation is not uniform or the foundation is soft. Moreover, the raft foundation is shallow in buried depth, and even can be used as a non-buried foundation. And (5) constructing the raft foundation, and finishing pouring concrete. The foundation type adopted by the building is closely related to the type of foundation soil and the distribution condition of soil layers. The main construction types of the raft foundation are a flat plate type raft foundation and a beam plate type raft foundation, and the flat plate type raft foundation is widely applied to high-rise buildings due to simple construction.
The expansive fiber concrete is commonly used for pouring the raft, however, in areas with larger rainwater and moisture such as Yu in China, the expansive fiber concrete needs to have better impermeability, so that the dryness of the foundation can be ensured by avoiding the infiltration of the rainwater and the moisture, and the stability of the building foundation is ensured.
Thus, we provide an expanded fiber concrete having better barrier properties.
Disclosure of Invention
The invention aims to provide C30P16 expansive fiber concrete which has good impermeability.
The technical purpose of the invention is realized by the following technical scheme: the C30P16 expansive fiber concrete comprises water, cement, fly ash, sand, broken stone, a water reducing agent, an expansive agent, a waterproof agent and fiber.
Preferably, the following components are by weight:
preferably, the water reducing agent is one or more of lignosulfonate, a naphthalene sulfonate water reducing agent, a PC polycarboxylic acid water reducing agent and casein.
Preferably, the PC polycarboxylic acid water reducing agent comprises methacrylic acid and maleic anhydride.
Preferably, the swelling agent is one or two of calcium sulphoaluminate and calcium oxide.
Preferably, the waterproof agent is one or two of glass beads and ceramic micropores.
The invention aims to provide a concrete construction process.
The technical purpose of the invention is realized by the following technical scheme: step 1, controlling the production process;
step 1, controlling the production process;
step 2, controlling the pumping process;
step 3, controlling the construction process;
step 4, maintenance control: spraying curing agent containing expanding agent on the surface of concrete;
and 5, ending.
Preferably, the step 3 comprises the following steps:
step 3.1: controlling the water heating;
step 3.2: pouring is performed in a slope pushing mode, the slope of the slope is 1:6, and the interlayer intermittent time is less than 8 hours;
step 3.3: and (3) when pouring again, removing floating slurry and loose stones on the surface of the first layer and performing the step 3.4: and carrying out secondary plastering and pressing 1-2 hours before final setting of the concrete.
In conclusion, the invention has the following beneficial effects:
(1) the concrete disclosed in the scheme mainly comprises substances such as water, cement, fly ash, sand, broken stone, a water reducing agent, an expanding agent, a waterproof agent, fibers and the like, wherein the substances such as the sand and the broken stone are used as concrete aggregate, the cement and the fly ash are fine powder with fine quality and can be used as a binder after being mixed with water, the two substances have the effects of adjusting workability and inhibiting bleeding and the like, the expanding agent added into the two substances is used for filling pores and cavities of the concrete, the multiple substances act simultaneously to enhance the impermeability of the concrete, and the impermeability grade of the concrete prepared in the scheme is higher than that of P16;
(2) the concrete also comprises fibers, wherein the fibers added in the concrete can improve the crack resistance and the tensile resistance of the concrete, materials such as stones and the like in the concrete and the polymer fibers bear together in the early stage of stretching and stretching, and after the base material is cracked, the fibers crossing the cracks become main bearing persons of external force, so that the cracks in the concrete are prevented from continuously expanding and cracking, and the toughness of the concrete is enhanced;
(3) when the construction time is in summer, the combined action of the water reducing agent and the expanding agent is adopted to achieve the effects of expansion limitation and seepage resistance, and then the combined action of the water reducing agent and the expanding agent and the fibers in the water reducing agent and the expanding agent is adopted to achieve the effect of cracking resistance;
(4) after the concrete is constructed and stands for a period of time, a curing agent is sprayed on the surface of the concrete, the curing agent also contains an expanding agent, epoxy resin, tetrahydrofuran, an emulsifier, a diluent, water and the like, and the curing agent is sprayed on the surface of the concrete and then generates a self-leveling effect under the action of self gravity and surface tension, wherein the expanding agent and the like in the curing agent are filled in gaps and holes on the surface of the concrete, so that the effects of repairing the surface of the concrete, improving the flatness and the like are achieved, and the water permeability is reduced;
(5) dissolving epoxy resin, an expanding agent and the like in an organic solvent such as tetrahydrofuran and the like, then adding water and an emulsifying agent, and stirring at a high speed to form emulsified suspension, wherein the adhesion degree of the emulsified suspension is higher; the epoxy resin has stable physical and chemical properties and a certain amount of elastic potential energy, and when the epoxy resin is filled in a concrete system, the elasticity of the concrete can be enhanced, the toughness of the concrete can be enhanced, and the walking comfort of a walker is enhanced.
Detailed Description
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example 1:
a C30P16 expansive fiber concrete comprises water, cement, fly ash, sand, broken stone, a water reducing agent, an expansive agent, a waterproof agent and fibers; the water reducing agent can be any one of lignosulfonate, a naphthalene sulfonate water reducing agent, a PC polycarboxylic acid water reducing agent and casein, or can be a mixture of a plurality of the water reducing agents, the PC polycarboxylic acid water reducing agent comprises methacrylic acid and maleic anhydride, the expanding agent is calcium sulphoaluminate or calcium oxide, and the waterproof agent is glass beads or a ceramic microporous material.
This example includes 60 parts of fly ash, 301 parts of cement, 1060 parts of crushed stone, 800 parts of sand, 5.6 parts of water reducing agent, 22 parts of expanding agent, 22 parts of waterproofing agent, 0.9 part of fiber and 166 parts of water.
The preparation process is as follows:
step 1, controlling the production process;
because the bulk concrete uses many material components and the mutual influence among all the components is large, in the production process, the following measures are adopted:
the machine sand contains water, the measurement is carried out once every 4 hours, and the stability of the water content in the production is controlled as much as possible;
in the feeding process, the aqueous solution adopts a multi-feeding method, part of water is fed firstly, after the water is stirred to be in a wet state, the admixture and the water are fed, and the admixture is fed into the rest part of water fully and uniformly, so that the components are more easily and uniformly stirred;
the stirring time is prolonged by 10 seconds, so that the water reducing agent, the waterproof agent and the like are fully dispersed in the concrete;
vehicle inspection is carried out at the exit port, and the exit is strictly forbidden when the vehicle inspection does not meet the slump requirement; random slump random spot check is carried out on the construction site, and the stability of the concrete quality is ensured.
Step 2, controlling the pumping process;
the vertical distance of pumping is-20 meters, and multi-stage stress erection is adopted, so that the fall is effectively reduced from minus 20 meters to 6 meters per stage, the free falling time of concrete during the pumping process is prolonged, and the pump blockage is avoided.
Step 3, controlling the construction process;
step 3.1: controlling the water heating;
step 3.2: pouring is performed in a slope pushing mode, the slope of the slope is 1:6, and the interlayer intermittent time is less than 8 hours;
step 3.3: when pouring again, removing floating slurry, loose stones and a soft concrete layer on the surface of the first layer, and vibrating for the second time after pouring;
step 3.4: and carrying out secondary plastering and pressing 1-2 hours before final setting of the concrete.
Step 4, maintenance control: spraying curing agent containing expanding agent on the surface of concrete;
and 5, ending.
The contents of the components in examples 1 to 9 are shown in the following table.
Table 1:
the concrete panels prepared in examples 1 to 9 were subjected to performance tests and recorded in table 2.
Table 2:
after the concrete is poured, a curing agent is sprayed on the surface of the concrete to further enhance the impermeability of the concrete, and the content of each material component in the curing agent is shown in the following table.
Table 3:
| example 10 | Example 11 | Example 12 | Example 13 | |
| Diluent | 80 | 100 | 87 | 92 |
| Expanding agent | 20 | 30 | 23 | 26 |
| Epoxy resin | 25 | 50 | 33 | 42 |
| Tetrahydrofuran (THF) | 10 | 30 | 17 | 24 |
| Emulsifier | 1 | 10 | 4 | 7 |
The formulations of the curing agents prepared in examples 10 to 13 were sprayed on the concrete surface prepared in example 1 and the relevant properties were measured and recorded in the following table.
The conclusion can be drawn: the proportions of several tests can meet the design requirements and the requirements on the impervious grade of raft casting, and the working performance is better in the experiments of examples 3, 4, 5, 6, 8 and 9, but the concrete in other schemes can also meet the working performance, and all the proportions can meet the requirements on the impervious grade; and various performances such as compressive strength and the like of the concrete road after the curing agent is sprayed on the surface of the concrete are obviously improved.
Claims (6)
1. The construction process of the concrete is characterized by mainly comprising the following steps of:
step 1, controlling the production process;
step 2, controlling the pumping process;
step 3, controlling the construction process;
step 4, maintenance control: spraying curing agent containing expanding agent on the surface of concrete; wherein the curing agent comprises 80-100 parts of diluent, 20-30 parts of expanding agent, 25-50 parts of epoxy resin, 10-30 parts of tetrahydrofuran and 1-10 parts of emulsifier;
step 5, ending;
the concrete is C30P16 expansive fiber concrete, and the concrete raw materials comprise the following components by weight:
60-80 parts of fly ash
300 portions of cement
1000 portions of gravel and 1100 portions of
750 portions of sand and 800 portions of
5-8 parts of water reducing agent
20-30 parts of expanding agent
20-45 parts of waterproof agent
0.8 to 1.0 portion of fiber
190 portions of water 160-.
2. The concrete construction process according to claim 1, wherein: the step 3 comprises the following steps:
step 3.1: controlling the water heating;
step 3.2: pouring is performed in a slope pushing mode, the slope of the slope is 1:6, and the interlayer intermittent time is less than 8 hours;
step 3.3: when pouring again, removing floating slurry, loose stones and a soft concrete layer on the surface of the first layer, and vibrating for the second time after pouring;
step 3.4: and carrying out secondary plastering and pressing 1-2 hours before final setting of the concrete.
3. The concrete construction process according to claim 1, wherein: the water reducing agent is one or more of lignosulfonate, a naphthalene sulfonate water reducing agent, a PC polycarboxylic acid water reducing agent and casein.
4. A concrete construction process according to claim 3, characterized in that: the PC polycarboxylic acid water reducing agent comprises methacrylic acid and maleic anhydride.
5. The concrete construction process according to claim 1, wherein: the expanding agent is one or two of calcium sulphoaluminate and calcium oxide.
6. The concrete construction process according to claim 1, wherein: the waterproof agent is prepared by mixing one or two of glass beads and ceramic microporous materials.
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| CN201711498411.8A CN108002765B (en) | 2017-12-29 | 2017-12-29 | C30P16 expansive fiber concrete preparation and concrete construction process |
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| CN114163186A (en) * | 2018-12-04 | 2022-03-11 | 吉林省建苑设计集团有限公司 | Impervious concrete and construction method thereof |
| CN109574566B (en) * | 2019-01-12 | 2021-07-13 | 武汉中阳明建材有限公司 | Concrete and preparation method thereof |
| CN111775276A (en) * | 2019-04-06 | 2020-10-16 | 广州振中建设有限公司 | Construction method for connecting water leakage prevention precast slabs |
| CN114135135A (en) * | 2021-12-03 | 2022-03-04 | 中国化学工程第六建设有限公司 | Leakage prevention method for large closed water pool in high-altitude desert environment |
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| JPH11131804A (en) * | 1997-10-29 | 1999-05-18 | Fujita Corp | Method for suppressing carbonation of lightweight concrete |
| CN1166580C (en) * | 2001-12-07 | 2004-09-15 | 北京市城昌商品混凝土联营公司 | Fibre anti-permeation cracking-resistant concrete |
| US7799129B2 (en) * | 2005-12-02 | 2010-09-21 | Thuan Bui | Lightweight structural concrete provided with various wood properties |
| CN102083763A (en) * | 2008-04-04 | 2011-06-01 | 图安·布伊 | Lightweight structural concrete composition |
| CN105601199A (en) * | 2015-12-25 | 2016-05-25 | 邢台建工商品混凝土有限公司 | Expansive anti-crack fiber concrete and preparation method therefor |
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Denomination of invention: C30p16 expansive fiber concrete preparation and concrete construction technology Effective date of registration: 20210812 Granted publication date: 20200811 Pledgee: Agricultural Bank of China Co.,Ltd. Chengdu Tianfu New Area Branch Pledgor: CHENGDU PRECISION CONCRETE Co.,Ltd. Registration number: Y2021510000182 |
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