CN113213848A - Multi-scale polypropylene fiber pump concrete - Google Patents
Multi-scale polypropylene fiber pump concrete Download PDFInfo
- Publication number
- CN113213848A CN113213848A CN202110561153.3A CN202110561153A CN113213848A CN 113213848 A CN113213848 A CN 113213848A CN 202110561153 A CN202110561153 A CN 202110561153A CN 113213848 A CN113213848 A CN 113213848A
- Authority
- CN
- China
- Prior art keywords
- parts
- polypropylene fiber
- concrete
- scale
- coarse aggregate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 87
- 239000000835 fiber Substances 0.000 title claims abstract description 84
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 79
- -1 polypropylene Polymers 0.000 title claims abstract description 79
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 79
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 26
- 239000004568 cement Substances 0.000 claims abstract description 25
- 239000003755 preservative agent Substances 0.000 claims abstract description 24
- 230000002335 preservative effect Effects 0.000 claims abstract description 24
- 239000004576 sand Substances 0.000 claims abstract description 23
- 239000010881 fly ash Substances 0.000 claims abstract description 19
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 19
- 239000011707 mineral Substances 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000002253 acid Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 abstract description 25
- 238000010276 construction Methods 0.000 abstract description 7
- 238000002474 experimental method Methods 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 19
- 239000000203 mixture Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 4
- 239000004566 building material Substances 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Images
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
- 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
-
- 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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
-
- 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]
Landscapes
- 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 invention relates to multi-scale polypropylene fiber pump concrete which is prepared from the raw materials of cement, mineral powder, fly ash, sand, coarse aggregate, a water reducing agent, a preservative, polypropylene fiber and water. Through a large number of experiments, the proper proportion of each component is optimized, and the concrete with high strength and good pumping performance is provided; the polypropylene fiber pump concrete has excellent slump, expansion, compressive strength, splitting tensile strength and early cracking resistance; the pump has good workability and good pumping performance, and can be used for pumping in site construction.
Description
Technical Field
The invention belongs to the technical field of concrete building materials, and particularly relates to multi-scale polypropylene fiber pump concrete.
Background
The pumping concrete is premixed concrete which is cast by adopting a concrete pump, the construction progress of the pumping concrete is accelerated compared with that of common concrete, the labor force can be saved, the manual operation intensity is reduced, and particularly in the cast-in-place structure of more and more high-rise buildings, a large amount of concrete needs to be horizontally and vertically transported to a high construction point. Moreover, the construction quality can be improved by adopting the pump concrete, the construction cost is obviously reduced, and the obvious technical and economic benefits can be obtained in the engineering, so that the pump concrete technology is widely applied. Currently, pump concrete has become the most used variety in ready-mixed concrete.
The performance requirement of the pumping concrete is higher than that of common concrete, the slump is larger than that of the common concrete, the fluidity of the pumping concrete in the transportation process of a mixer truck needs to be ensured, and if the performance of the pumping concrete is problematic, the problem that the pumping concrete cannot be poured on site due to poor fluidity can occur. Currently, a series of problems still exist in pumping concrete, which needs to be solved urgently: (1) the suspension state of the stones in the cement is lost, the stones are accumulated together, and then the pipeline is blocked; (2) the concrete has unreasonable design of the mix proportion, so that the slump of the concrete is overlarge; (3) the pumping pressure loss increases with the increase of the pumping speed. (4) The mechanical property is not enough, the compressive strength and the splitting tensile strength do not reach the standard, the crack resistance is poor, various diseases such as lining cracking, lining corrosion, water leakage and the like appear in the tunnel lining in sequence, and the driving safety is seriously influenced; and disease control, secondary lining replacement and even arch wall replacement are needed for the serious disease section, so that huge economic loss is generated. (5) The pumped fiber concrete is easy to agglomerate to cause pump blockage or is easy to bleed and separate. Intensive research on pumpability and workability of the pumped concrete is needed, and the pumped concrete which meets pumping requirements and has performance superior to that of common concrete is researched.
Disclosure of Invention
In view of the above, the invention aims to provide a pumping concrete which has high compressive strength, high split tensile strength, high crack resistance and good pumping performance and can be used for field construction.
In order to achieve the purpose, the invention provides the following technical scheme:
1. a multi-scale polypropylene fiber pump concrete, which is prepared from the following raw materials in parts by weight: cement, mineral powder, fly ash, sand, coarse aggregate, a water reducing agent, a preservative, polypropylene fiber and water.
Further, the coarse aggregate is composed of a coarse aggregate I with the thickness of 5-10 mm and a coarse aggregate II with the thickness of 10-25 mm.
Further, the raw materials of the multi-scale polypropylene fiber pump concrete comprise 290-310 parts by mass of cement, 135-155 parts by mass of mineral powder, 46-58 parts by mass of fly ash, 660-680 parts by mass of sand and 260-280 parts by mass of coarse aggregate; 810-850 parts of coarse aggregate, 6.2-7.2 parts of water reducing agent, 7.2-9 parts of preservative, 0.9-4 parts of polypropylene fiber and 165-180 parts of water.
Further, the raw materials of the multi-scale polypropylene fiber pump concrete comprise, by mass, 300 parts of cement, 150 parts of mineral powder, 50 parts of fly ash, 664 parts of sand and 268 parts of coarse aggregate; 824.8 parts of coarse aggregate, 6.6 parts of water reducing agent, 8 parts of preservative, 0.9-6 parts of polypropylene fiber and 165-180 parts of water.
Further, the cement in the multi-scale polypropylene fiber pump concrete is labeled P.O 42.5.5R.
Further, the fine aggregate is machine-made sand with fineness modulus of 2.6-3.0.
Further, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the preservative is SBT-RMA (II) concrete high-efficiency preservative.
Furthermore, the diameter of the polypropylene fiber is 0.030-0.90mm, and the length is 15-60 mm.
Further, the polypropylene fiber comprises a polypropylene fiber 1, a polypropylene fiber 2 and a polypropylene fiber 3, wherein the diameter of the polypropylene fiber 1 is 0.027-0.032mm, and the length of the polypropylene fiber 1 is 15-20 mm; the diameter of the polypropylene fiber 2 is 0.110-0.160mm, and the length is 15-25 mm; the diameter of the polypropylene fiber 3 is 0.810-0.850mm, and the length is 30-60 mm.
Further, the polypropylene fiber comprises 0.45 part of polypropylene fiber 1, 0.45 part of polypropylene fiber 2 and 2-3 parts of polypropylene fiber 3.
Further, the polypropylene fibers include 0.45 parts of polypropylene fiber 1, 0.45 parts of polypropylene fiber 2, and 2.1 parts of polypropylene fiber 3.
The invention has the beneficial effects that: according to a large number of experiments, the proper proportion of the components such as the cementing material, the sand, the coarse aggregate, the water reducing agent, the water and the like is optimized, and the proportion of the cement, the mineral powder and the fly ash in the cementing material is optimized to obtain the concrete with the slump and the expansion meeting the pumping requirements, a proper amount of polypropylene fiber is added to further improve the crack resistance of the concrete, meanwhile, the multi-scale fiber concrete formed by mixing two or more fibers with different types or different sizes in the concrete according to a proper proportion is added, the optimized components generate a forward synergistic effect, the advantages of the different fibers are effectively exerted, and therefore the mechanical property and the durability of the concrete are comprehensively and greatly improved. The polypropylene fiber pump concrete has excellent slump, expansion degree, compressive strength, splitting tensile strength and crack resistance; the pump has good workability and good pumping performance, and can be used for pumping in site construction.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 shows the results of a plain concrete split-tensile failure;
FIG. 2 shows the results of the concrete split-tensile failure prepared in example 7;
FIG. 3 shows the test results of plain concrete slab method;
FIG. 4 shows the results of the concrete slab test prepared in example 7.
Detailed Description
The following detailed description of preferred embodiments of the invention refers to the accompanying drawings. The experimental procedures, in which specific conditions are not specified in the examples, are generally carried out under conventional conditions or under conditions recommended by the manufacturers.
Example 1
The materials used were:
the cement is P.O 42.5R of Chongqing conch cement company Limited;
the fine aggregate is machine-made sand produced by Chongqing Jinzhuan building materials, and the fineness modulus is 2.6-3.0;
the coarse aggregate is crushed stone with the particle size of 5-25mm produced by Chongqing gold-diameter building materials GmbH, and is continuously graded; the primary coarse aggregate has a particle size of 5-10 mm, and the secondary coarse aggregate has a particle size of 10-25 mm;
the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent;
the preservative is a Jiangsu Subo SBT-RMA (II) concrete high-efficiency preservative.
The method comprises the following steps: determination of the proportions of the base materials (adaptation of slump, expansion).
Test 1: the composition comprises the following components in parts by weight: 250 parts of cement, 180 parts of mineral powder, 70 parts of fly ash, 700 parts of sand, 210 parts of a first coarse aggregate, 840 parts of a second coarse aggregate, 150 parts of water, 5.4 parts of a water reducing agent and 8.1 parts of a preservative, and the preparation method is a mixing method which is universal in the industry. The slump of the concrete discharged from the machine is 158mm, the expansion degree is 350mm, the pumping requirement is not met, the weight parts of the water reducing agent are adjusted, and a second group of tests are carried out.
Test 2: the composition comprises the following components in parts by weight: 250 parts of cement, 180 parts of mineral powder, 70 parts of fly ash, 700 parts of sand, 210 parts of a first coarse aggregate, 840 parts of a second coarse aggregate, 150 parts of water, 7.2 parts of a water reducing agent and 8.1 parts of a preservative, and the preparation method is a mixing method which is universal in the industry. The slump of the concrete discharged from the machine is 163mm, the expansion degree is 377mm, the pumping requirement is not met, the coarse and fine aggregate proportion and the water-cement ratio are adjusted, and a third group of tests are carried out.
Test 3: the composition comprises the following components in parts by weight: 300 parts of cement, 180 parts of mineral powder, 100 parts of fly ash, 700 parts of sand, 262.7 parts of first coarse aggregate, 787.3 parts of second coarse aggregate, 165 parts of water, 7.3 parts of water reducing agent and 8 parts of preservative, and the preparation method is a mixing method which is universal in the industry. The slump of the concrete discharged from the machine is 206mm, the expansion degree is 425mm, the pumping requirement is not met, the coarse and fine aggregates and the sand rate are continuously adjusted, and a fourth group of tests are carried out. The above is only a very small set of data tested during the course of the present invention.
Test 4: the composition comprises the following components in parts by weight: 300 parts of cement, 150 parts of mineral powder, 50 parts of fly ash, 664 parts of sand, 268 parts of first coarse aggregate, 824.8 parts of second coarse aggregate, 168 parts of water, 6.6 parts of a water reducing agent and 8 parts of a preservative, and the preparation method is a mixing method which is common in the industry. The slump of the concrete leaving machine is 213mm, the expansion degree is 490mm, and the pumping requirement is met. Through a large number of tests, the slump and the expansion of the concrete consisting of the following components in parts by weight meet the pumping requirement: 290-310 parts of cement; 135-155 parts of mineral powder; 46-58 parts of fly ash; sand: 660-680 parts; the first coarse aggregate: 260-280 parts of a binder; and (2) coarse aggregate II: 810-850 parts of a binder; water: 165-180 parts; water reducing agent: 6.2-7.2 parts; preservative: 7.2-9 parts. The concrete with the strength grade of C45 has the slump of 200 +/-30 to meet the pumping requirement; the spread was 500. + -.30.
Example 2
The concrete prepared in example 1, which satisfies the pumping requirements for both slump and spread, was subjected to a slab test, and a large number of cracks were generated. After a plurality of tests, the polypropylene fiber is added to improve the crack resistance.
Table 1 shows the physical properties of the polypropylene fiber used in the present invention, wherein polypropylene fiber 1 is produced by Beijing melt naier engineering materials, polypropylene fiber 2 is produced by Jiangsu Nantong Xindike monofilament science and technology, and polypropylene fiber 3 is produced by Ningbo Dai New materials, the crude polypropylene fiber is a wavy, double-sided twill type polypropylene fiber.
TABLE 1 Polypropylene fiber physical Properties
Example 2: the composition comprises the following components in parts by weight: 300 parts of cement, 150 parts of mineral powder, 50 parts of fly ash, 664 parts of sand, 268 parts of first coarse aggregate, 824.8 parts of second coarse aggregate, 168 parts of water, 6.6 parts of a water reducing agent, 8 parts of a preservative and 0.9 part of polypropylene fiber 1.
Example 3: the composition comprises the following components in parts by weight: 310 parts of cement, 150 parts of mineral powder, 50 parts of fly ash, 664 parts of sand, 268 parts of first coarse aggregate, 824.8 parts of second coarse aggregate, 168 parts of water, 6.6 parts of a water reducing agent, 8 parts of a preservative and 0.9 part of polypropylene fiber 2.
Example 4: the composition comprises the following components in parts by weight: 300 parts of cement, 150 parts of mineral powder, 50 parts of fly ash, 664 parts of sand, 268 parts of first coarse aggregate, 824.8 parts of second coarse aggregate, 168 parts of water, 6.6 parts of a water reducing agent, 8 parts of a preservative and 3 parts of polypropylene fiber.
Example 5: the composition comprises the following components in parts by weight: 300 parts of cement, 150 parts of mineral powder, 50 parts of fly ash, 664 parts of sand, 268 parts of first coarse aggregate, 824.8 parts of second coarse aggregate, 168 parts of water, 6.6 parts of a water reducing agent, 8 parts of a preservative and 6 parts of polypropylene fiber 3.
Example 6: the composition comprises the following components in parts by weight: 300 parts of cement, 150 parts of mineral powder, 50 parts of fly ash, 664 parts of sand, 268 parts of first coarse aggregate, 824.8 parts of second coarse aggregate, 168 parts of water, 6.6 parts of a water reducing agent, 8 parts of a preservative, 0.9 part of polypropylene fiber 1, and 2.1 parts of polypropylene fiber 3.
Example 7: the composition comprises the following components in parts by weight: 300 parts of cement, 150 parts of mineral powder, 50 parts of fly ash, 664 parts of sand, 268 parts of first coarse aggregate, 824.8 parts of second coarse aggregate, 168 parts of water, 6.6 parts of a water reducing agent, 8 parts of a preservative, 0.45 part of polypropylene fiber 1, 0.45 part of polypropylene fiber 2 and 2.1 parts of polypropylene fiber 3.
Testing the performance of the concrete prepared in the embodiment, and using a slump method to obtain slump and expansion; the slump after completion of the stirring and the slump loss after 2 hours, as well as the compressive strength and the split tensile strength at 7 days, 14 days and 28 days were measured, and the results are shown in Table 2. The plain concrete and the concrete prepared in example 7 are subjected to crack resistance tests, and the comparison between the split tensile failure of the concrete is shown in fig. 1 and fig. 2, wherein fig. 1 shows the split tensile failure result of the plain concrete, and fig. 2 shows the split tensile failure result of the concrete prepared in example 7.
TABLE 2
The multi-scale polypropylene fiber concrete meets the requirement of pump concrete, and the slump is 200 +/-30; the expansion degree is 500 +/-30; the concrete strength grade is C45, and the 28d cubic compressive strength of the concrete is more than 45MPa。
Crack resistance of concrete
The plain concrete and the concrete prepared in example 7 were tested for the height of the concrete at the main stress, the initiation time, the number of cracks, the length of 24h cracks, and the width of 24h cracks, respectively, by the slab test, and the test results are shown in table 3. FIG. 3 shows the results of plain concrete slab test, and FIG. 4 shows the results of concrete slab test prepared in example 7. It can be seen that the crack resistance of the fiber concrete of the present invention is significantly enhanced.
TABLE 3 test results of concrete crack resistance
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (10)
1. The multi-scale polypropylene fiber pump concrete is characterized in that the raw materials of the multi-scale polypropylene fiber pump concrete comprise: cement, mineral powder, fly ash, sand, coarse aggregate, a water reducing agent, a preservative, polypropylene fiber and water.
2. The multi-scale polypropylene fiber pump concrete according to claim 1, wherein the coarse aggregate is composed of 5-10 mm coarse aggregate I and 10-25 mm coarse aggregate II.
3. The multi-scale polypropylene fiber pump concrete according to claim 1 or 2, wherein the raw materials of the multi-scale polypropylene fiber pump concrete comprise 290-310 parts by weight of cement, 135-155 parts by weight of mineral powder, 46-58 parts by weight of fly ash, 660-680 parts by weight of sand and 260-280 parts by weight of coarse aggregate; 810-850 parts of coarse aggregate, 6.2-7.2 parts of water reducing agent, 7.2-9 parts of preservative, 0.5-6 parts of polypropylene fiber and 165-180 parts of water.
4. The multi-scale polypropylene fiber pump concrete according to claim 3, wherein the raw materials of the multi-scale polypropylene fiber pump concrete comprise, by mass, 300 parts of cement, 150 parts of mineral powder, 50 parts of fly ash, 664 parts of sand and 268 parts of coarse aggregate; 824.8 parts of coarse aggregate, 6.6 parts of water reducing agent, 8 parts of preservative, 0.9-4 parts of polypropylene fiber and 165-180 parts of water.
5. The multi-scale polypropylene fiber pump concrete according to claim 1, wherein the cement in the multi-scale polypropylene fiber pump concrete is labeled P.O 42.5.5R.
6. The multi-scale polypropylene fiber pump concrete according to claim 1, wherein the fine aggregate is machine-made sand with fineness modulus of 2.6-3.0.
7. The multi-scale polypropylene fiber pump concrete according to claim 1, wherein the water reducing agent is a polycarboxylic acid high efficiency water reducing agent, and the preservative is SBT-RMA (II) concrete high efficiency preservative.
8. The multi-scale polypropylene fiber pump concrete according to claim 1, wherein the polypropylene fibers have a diameter of 0.030 to 0.90mm and a length of 15 to 60 mm.
9. The multi-scale polypropylene fiber pump concrete according to claim 8, wherein the polypropylene fibers comprise polypropylene fibers 1, polypropylene fibers 2 and polypropylene fibers 3, the polypropylene fibers 1 have a diameter of 0.027-0.032mm and a length of 15-20 mm; the diameter of the polypropylene fiber 2 is 0.110-0.160mm, and the length is 15-25 mm; the diameter of the polypropylene fiber 3 is 0.810-0.850mm, and the length is 30-60 mm.
10. The multi-scale polypropylene fiber pump concrete according to claim 9, wherein the polypropylene fibers comprise 0.45 parts of polypropylene fiber 1, 0.45 parts of polypropylene fiber 2 and 2-3 parts of polypropylene fiber 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110561153.3A CN113213848A (en) | 2021-05-21 | 2021-05-21 | Multi-scale polypropylene fiber pump concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110561153.3A CN113213848A (en) | 2021-05-21 | 2021-05-21 | Multi-scale polypropylene fiber pump concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113213848A true CN113213848A (en) | 2021-08-06 |
Family
ID=77099336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110561153.3A Pending CN113213848A (en) | 2021-05-21 | 2021-05-21 | Multi-scale polypropylene fiber pump concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113213848A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105272020A (en) * | 2015-11-20 | 2016-01-27 | 上海建工材料工程有限公司 | C40 pump concrete with heat resisting temperature of 500 DEG C |
| CN106699070A (en) * | 2017-01-26 | 2017-05-24 | 重庆大学 | Multi-dimension polypropylene fiber concrete |
| CN109776052A (en) * | 2019-03-15 | 2019-05-21 | 长安大学 | A kind of fiber reinforced lightweight aggregate concrete of self-compaction and preparation method thereof |
| CN110746159A (en) * | 2019-11-11 | 2020-02-04 | 十九冶成都建设有限公司 | Anti-crack pumping concrete and preparation method and pumping method thereof |
-
2021
- 2021-05-21 CN CN202110561153.3A patent/CN113213848A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105272020A (en) * | 2015-11-20 | 2016-01-27 | 上海建工材料工程有限公司 | C40 pump concrete with heat resisting temperature of 500 DEG C |
| CN106699070A (en) * | 2017-01-26 | 2017-05-24 | 重庆大学 | Multi-dimension polypropylene fiber concrete |
| CN109776052A (en) * | 2019-03-15 | 2019-05-21 | 长安大学 | A kind of fiber reinforced lightweight aggregate concrete of self-compaction and preparation method thereof |
| CN110746159A (en) * | 2019-11-11 | 2020-02-04 | 十九冶成都建设有限公司 | Anti-crack pumping concrete and preparation method and pumping method thereof |
Non-Patent Citations (5)
| Title |
|---|
| LIANG NH: ""Corrosion resistance of multiscale polypropylene fiber-reinforced concrete under sulfate attack"", 《CASE STUDIES IN CONSTRUCTION MATERIALS》 * |
| 梁宁慧: ""多尺寸聚丙烯纤维混凝土抗弯韧性试验研究"", 《中南大学学报》 * |
| 梁宁慧: ""多尺度聚丙烯纤维混凝土孔结构及抗冻性"", 《重庆大学学报》 * |
| 梁宁慧: ""多尺度聚丙烯纤维混凝土抗裂性能的试验研究"", 《煤炭学报》 * |
| 王中华, 湖南科学技术出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109665767B (en) | Self-compacting freeze-thaw resistant concrete and preparation method thereof | |
| CN101492268B (en) | Concrete mending mortar additive and formulating method for mending mortar | |
| CN111439977A (en) | Impact-resistant basalt fiber reinforced concrete and preparation method thereof | |
| CN107032695B (en) | Steel fiber self-compacting concrete, preparation method thereof and prefabricated part | |
| CN110746159A (en) | Anti-crack pumping concrete and preparation method and pumping method thereof | |
| CN111439973B (en) | Cement-based grouting material and preparation method and application thereof | |
| CN115028415B (en) | High-strength premixed pervious concrete and preparation method thereof | |
| CN102503298B (en) | Size-graded steel fiber elevating concrete and preparation method | |
| CN107973555A (en) | A kind of glass fibre self-compacting concrete | |
| CN113968702A (en) | Fiber and polymer composite modified cement-based repair mortar and preparation method thereof | |
| CN113636802A (en) | Ultrahigh-performance concrete and preparation method thereof | |
| CN113277782A (en) | Corrosion-resistant concrete and preparation method thereof | |
| CN115321924B (en) | Durable self-compaction filling concrete material for underground structural engineering | |
| CN112456906A (en) | Application of silicon carbide whiskers in preparation of wear-resistant toughened anti-crack cement-based material | |
| Kamal et al. | Effect of polypropylene fibers on development of fresh and hardened properties of recycled self-compacting concrete | |
| CN117105546A (en) | Metal-rich cement additive and application thereof in improving concrete performance by using reinforcing steel bars | |
| CN113968705B (en) | Multi-element gel system STC (concrete-time-dependent temperature) ultrahigh-toughness concrete material for bridge deck pavement | |
| CN113213848A (en) | Multi-scale polypropylene fiber pump concrete | |
| CN113061003B (en) | Low-temperature ultra-high-performance concrete and preparation method and application thereof | |
| CN114605119A (en) | Anti-freezing and anti-cracking concrete | |
| CN116177945A (en) | Preparation process of anti-cracking mass concrete applied to road engineering construction | |
| CN114293539A (en) | Functional gradient self-healing high-strength concrete pipe pile and preparation method thereof | |
| CN114716206B (en) | Anti-freezing, anti-permeability and anti-cracking ultrahigh-performance concrete, preparation method thereof and construction method of expansion joint protection belt | |
| Al-Shaikhli et al. | Effect of steel fiber on punching shear strength of non-rectangular reactive powder concrete slabs | |
| CN115448687B (en) | Magnesium ammonium phosphate cement-based composite material and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220608 Address after: 400 000 No. 174 Zhengjie, Shapingba District, Chongqing Applicant after: Chongqing University Applicant after: Road and bridge construction Chongqing Fengshi Expressway Development Co.,Ltd. Address before: 400 000 No. 174 Zhengjie, Shapingba District, Chongqing Applicant before: Chongqing University |
|
| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210806 |
|
| RJ01 | Rejection of invention patent application after publication |