CN114230272A - Anti-impact wear-resistant ultra-high performance concrete and application thereof - Google Patents
Anti-impact wear-resistant ultra-high performance concrete and application thereof Download PDFInfo
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- CN114230272A CN114230272A CN202111505149.1A CN202111505149A CN114230272A CN 114230272 A CN114230272 A CN 114230272A CN 202111505149 A CN202111505149 A CN 202111505149A CN 114230272 A CN114230272 A CN 114230272A
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
- C04B18/165—Ceramic waste
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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
- C04B2111/2038—Resistance against physical degradation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to an impact-resistant wear-resistant ultra-high performance concrete, which comprises the following components, by mass, 100 parts of a cementing material, 80-150 parts of ceramic sand, 1-8 parts of an additive, 14-24 parts of water and 0-30 parts of fibers. The preparation method comprises the steps of crushing the waste fired ceramics into ceramic sand, and using the ceramic sand as all fine aggregates for preparing the ultrahigh-performance concrete, wherein the maximum particle size of the ceramic sand is 5mm, and micron-sized pores are formed in the surface of the ceramic sand. The ultra-high performance concrete prepared by the invention can effectively improve the anti-impact and wear-resistant performance, can improve the anti-impact and wear-resistant strength by more than 30% and improve the wear resistance by more than 40% compared with the quartz sand aggregate ultra-high performance concrete, is suitable for engineering parts with anti-impact and wear-resistant requirements, can effectively recycle waste fired ceramics, and has remarkable economic and social benefits.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to impact-resistant wear-resistant ultra-high performance concrete and application thereof.
Background
The ultra-high performance concrete (UHPC) is a cement-based material based on close packing of aggregate and cementing material, low water-cement ratio and steel fiber reinforcement, has ultrahigh strength, high toughness and excellent durability, and gradually develops engineering application in a plurality of engineering fields in recent years. The maximum aggregate particle size is less than 8mm, usually the aggregate particle size is less than 2.36mm, usually quartz sand is used as the aggregate, the water-gel ratio is less than 0.24, and the compressive strength is not less than 100 MPa.
The parts of many hydraulic engineering that are washed away are worn seriously because of high-speed rivers erode and cavitation erosion, and structures such as bridge pier stud appear reinforcing bar protective layer concrete under the scouring and dynamic load coupling effect and cavitation erosion effect such as torrential flood, mud-rock flow easily and erode and drop and crack, cause huge potential safety hazard and higher cost of maintenance. Therefore, the development of a building material having high abrasion resistance is urgently required. In addition, hardened floor materials having good wear resistance are also required for places such as factory floors, which are often subjected to heavy pressure and impact load.
The ultra-high performance concrete has compact microstructure, high compressive strength and high impact resistance and wear resistance, and is a novel building material which is more suitable for the purposes. In order to ensure the service life of engineering, how to further improve the impact resistance and wear resistance of the ultra-high performance concrete is an important research topic.
On the other hand, China is a large country for ceramic production, a large amount of fired ceramic is discarded due to excessive deformation, breakage and the like every year, and most of the fired ceramic can be only subjected to landfill treatment, so that not only is great pressure on the environment caused, but also the sustainable development of the ceramic industry is limited. The effective treatment of waste fired ceramics is a difficult problem to be solved urgently.
At present, few researches for using waste fired ceramics as recycled aggregates exist at home and abroad, wherein most researches prepare the waste fired ceramics as recycled coarse aggregates and are applied to low-strength common concrete; in a small part of researches, waste fired ceramics are prepared into recycled fine aggregates which are applied to low-strength common concrete and common mortar, the lowest water-cement ratio of the waste fired ceramics is 0.41, usually 0.5-1.11, the concrete strength grade is C20-C40, the mortar strength grade is M7.5-M40, the feasibility researches of replacing the traditional coarse and fine aggregates with the waste fired ceramics recycled aggregates are concerned, the changes of the compressive strength and the working performance of the waste fired ceramics are concerned, the researches on the impact resistance and the wear resistance are not found, and the application in the aspect of ultra-high performance concrete is not reported.
Disclosure of Invention
Aiming at the technical problems in the prior art, one of the purposes of the invention is as follows: the anti-impact wear-resistant ultra-high performance concrete can effectively improve the anti-impact wear-resistant performance and is suitable for engineering parts with anti-impact wear and wear-resistant requirements.
Aiming at the technical problems in the prior art, the second purpose of the invention is as follows: provides an application of impact-resistant wear-resistant ultra-high performance concrete.
In order to achieve the purpose, the invention adopts the following technical scheme:
the shock-resistant wear-resistant ultrahigh-performance concrete comprises, by mass, 100 parts of a cementing material, 80-150 parts of ceramic sand, 1-8 parts of an additive, 14-24 parts of water and 0-30 parts of fibers.
Preferably, the composite material comprises, by mass, 100 parts of a cementing material, 90-130 parts of ceramic sand, 2-4 parts of an additive, 16-22 parts of water and 7-25 parts of fibers.
The preparation method comprises the steps of crushing the waste fired ceramics into ceramic sand, and preparing the impact-resistant and wear-resistant ultrahigh-performance concrete by using the ceramic sand as fine aggregate. The ceramic sand is used as the fine aggregate, and the ceramic sand is used for completely replacing the fine aggregate in the existing ultra-high performance concrete raw material.
Preferably, the ceramic sand is obtained by crushing waste fired ceramics such as waste ceramic tiles to a size of 5mm or less.
Preferably, the raw materials of the ultra-high performance concrete comprise a cementing material, fine aggregate, an additive and water, and fibers can also be added; wherein the cementitious material comprises cement and a mineral admixture.
More preferably, the mineral admixture is at least one of silica fume, granulated blast furnace slag powder, fly ash, limestone powder, quartz powder, metakaolin, steel slag powder, granulated blast furnace phosphorous slag powder, zeolite powder and pozzolanic material; the fine aggregate is waste ceramic reclaimed sand; the admixture comprises a water reducing agent and can also contain at least one of retarder, defoamer, early strength agent, air entraining agent, expanding agent, plastic expanding agent, pumping aid, antifreezing agent, coagulant, water-retaining agent, viscosity modifier, rust inhibitor, internal curing agent and shrinkage reducing agent; the fiber is at least one of steel fiber, alkali-resistant glass fiber, basalt fiber and organic fiber.
Preferably, the particle size of the ceramic sand is 0-4.75 mm; or 0 to 2.36mm, or 0.15 to 1.18 mm.
Preferably, the surface of the ceramic sand is provided with micron-sized pores, and the pores are 1-20 microns.
The application of the impact-resistant wear-resistant ultra-high performance concrete is preferably applied to building materials with high impact resistance and wear resistance.
In summary, the present invention has the following advantages:
the ceramic sand prepared by the waste sintered ceramic replaces original fine aggregate of the ultrahigh-performance concrete, and compared with the quartz sand aggregate ultrahigh-performance concrete, the ceramic sand can effectively improve the impact resistance and wear resistance, is suitable for engineering parts with the requirements of impact resistance and wear resistance, can effectively recycle the waste sintered ceramic, and has remarkable economic and social benefits.
Drawings
Fig. 1 is an SEM image of the waste ceramic reclaimed sand with a magnification of 500X.
Fig. 2 is an SEM image of the waste ceramic reclaimed sand with magnification of 2000X.
FIG. 3 is an SEM image of quartz sand at 1000 Xmagnification.
FIG. 4 is an SEM image of quartz sand at a magnification of 5000X.
Detailed Description
The present invention will be described in further detail below.
Those who do not specify specific conditions in the examples of the present invention follow conventional conditions or conditions recommended by the manufacturer. The raw materials, reagents and the like which are not indicated for manufacturers are all conventional products which can be obtained by commercial purchase.
The ultra-high performance concrete consists of a cementing material, fine aggregate, an additive, water and steel fibers, wherein the cementing material is cement, silica fume, mineral powder and fly ash (the mass ratio of cement to silica fume to mineral powder to fly ash is 70:15:10:5), the cement is 42.5R portland cement, and the silica fume is 90%#Silicon ash, wherein the mineral powder is S95-grade granulated blast furnace slag powder, and the fly ash is I-grade fly ash; the fine aggregate is ceramic sand and quartz sand obtained by crushing waste fired ceramic wall and floor tiles respectively. The surface of the waste ceramic reclaimed sand has a large number of pores of 1-20 microns, and the apparent density is 2420kg/m30.15 to 1.18m in terms of particle diameterm of ceramic sand A and 0-4.75 mm of ceramic sand B; the apparent density of the quartz sand is 2640kg/m3(ii) a The additive is a polycarboxylic acid water reducing agent; the water is tap water; the steel fiber is copper-plated micro-wire steel fiber.
Comparative example 1
The fine aggregate is quartz sand with the particle size of 0.15-1.18 mm. The mixing ratio is shown in Table 1, and the test results are shown in Table 2.
Example 1
Ceramic sand A with the grain diameter of 0.15-1.18 mm is used for replacing quartz sand with equal volume at the replacement rate of 100%. The mixing ratio is shown in Table 1, and the test results are shown in Table 2.
Example 2
Ceramic sand B with the grain diameter of 0-4.75 mm is used for replacing quartz sand with equal volume at the replacement rate of 100%. The mixing ratio is shown in Table 1, and the test results are shown in Table 2.
All the ultra-high performance concrete mix ratios and test results of this example are shown in tables 1 and 2. The abrasion resistance test adopts an underwater steel ball method according to the Hydraulic concrete test regulations (SL 352-2020), flat cylindrical test pieces with the diameter of 300mm and the height of 100mm are adopted in the size, 3 groups of test pieces are manufactured according to each mixing ratio, and the average value is obtained; wear resistance test according to the test method for wear resistance of concrete and products thereof (ball bearing method) (GB/T16925-1997), cube test pieces with side length of 100mm are adopted in the size, 5 groups of test pieces are manufactured according to each mixing ratio, and the average value is taken.
TABLE 1 ultra high Performance concrete mix proportions
| Serial number | Aggregate type | Cementitious material | Quartz sand | Ceramic sand | Water reducing agent | Water (W) | Steel fiber |
| Comparative example 1 | Quartz sand | 100 | 120 | 0 | 3.0 | 15.7 | 15.7 |
| Example 1 | Ceramic sand A | 100 | 0 | 110 | 3.0 | 15.7 | 15.7 |
| Example 2 | Ceramic sand B | 100 | 0 | 110 | 3.0 | 15.7 | 15.7 |
TABLE 2 ultra high Performance concrete test results
As can be seen from the matching ratio of the ultrahigh-performance concrete in Table 1 and the test results of the ultrahigh-performance concrete in Table 2, the ceramic sand is used for replacing quartz sand to prepare the ultrahigh-performance concrete, the 28d compressive strength of the ultrahigh-performance concrete is improved by about 10 percent, the abrasion resistance can be improved by 33 to 39 percent, the wear resistance can be improved by 46 to 50 percent, and the improvement range of the abrasion resistance and the wear resistance is far larger than the improvement range of the compressive strength.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the ceramic sand is directly used for replacing the original quartz sand aggregate, the use is convenient, and the influence of the ceramic sand on the hydration process of the cementing material and the compatibility of raw materials do not need to be considered.
(2) Can obviously improve the impact resistance and the wear resistance of the ultra-high performance concrete.
(3) The ceramic sand is adopted to replace the original fine aggregate, and compared with the traditional mode of improving the anti-impact and wear-resistant performance of the ultra-high performance concrete by adopting the auxiliary cementing material (SCM), the fiber, the control of the curing condition and the like, the cost is lower and the operation is more convenient.
(4) The used ceramic sand is obtained by crushing waste fired ceramics such as waste ceramic wall and floor tiles, can effectively solve the problem of treatment of the waste fired ceramics, and has remarkable economic, social and environmental benefits.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The anti-impact wear-resistant ultra-high performance concrete is characterized in that: the ceramic fiber comprises, by mass, 100 parts of a cementing material, 80-150 parts of ceramic sand, 1-8 parts of an additive, 14-24 parts of water and 0-30 parts of fibers.
2. The impact-resistant wear-resistant ultra-high performance concrete according to claim 1, wherein: the cement mortar comprises, by mass, 100 parts of a cementing material, 90-130 parts of ceramic sand, 2-4 parts of an additive, 16-22 parts of water and 7-25 parts of fibers.
3. The impact-resistant wear-resistant ultra-high performance concrete according to claim 1, wherein: the maximum particle size of the ceramic sand is 5 mm.
4. The impact-resistant wear-resistant ultra-high performance concrete according to claim 3, wherein: the grain size of the ceramic sand is 0-4.75 mm.
5. The impact-resistant wear-resistant ultra-high performance concrete according to claim 3, wherein: the grain size of the ceramic sand is 0-2.36 mm.
6. The impact-resistant wear-resistant ultra-high performance concrete according to claim 3, wherein: the grain size of the ceramic sand is 0.15-1.18 mm.
7. The impact-resistant wear-resistant ultra-high performance concrete according to claim 1, wherein: the ceramic sand is obtained by crushing waste fired ceramics, and micron-sized pores are formed in the surface of the ceramic sand and are 1-20 microns.
8. The impact-resistant wear-resistant ultra-high performance concrete according to claim 1, wherein: the cementing material is composed of cement and mineral admixture, wherein the mineral admixture is at least one of silica fume, granulated blast furnace slag powder, fly ash, limestone powder, quartz powder, metakaolin, steel slag powder, granulated blast furnace phosphorous slag powder, zeolite powder and pozzolanic material.
9. The impact-resistant wear-resistant ultra-high performance concrete according to claim 1, wherein: the admixture comprises a water reducing agent and also can contain at least one of retarder, defoamer, early strength agent, air entraining agent, expanding agent, plastic expanding agent, pumping aid, antifreezing agent, coagulant, water-retaining agent, viscosity modifier, rust inhibitor, internal curing agent and shrinkage reducing agent; the fiber is at least one of steel fiber, alkali-resistant glass fiber, basalt fiber and organic fiber.
10. Use of an impact-resistant, wear-resistant ultra-high performance concrete according to any one of claims 1 to 9 in high impact wear-resistant building materials.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107311559A (en) * | 2017-06-05 | 2017-11-03 | 山东龙泉管道工程股份有限公司 | Waste ceramic fine concrete and preparation method thereof |
| CN109467370A (en) * | 2019-01-14 | 2019-03-15 | 湘潭大学 | A kind of high additive mixing ceramic tile aggregate C160UHPC and preparation method thereof |
| CN110818354A (en) * | 2019-11-21 | 2020-02-21 | 华东交通大学 | Ceramic particle-doped ultrahigh-performance concrete and preparation method thereof |
| CN110835251A (en) * | 2019-12-10 | 2020-02-25 | 华东交通大学 | Ultrahigh-performance concrete and preparation method thereof |
| CN111233390A (en) * | 2020-01-15 | 2020-06-05 | 中建材中岩科技有限公司 | Ultrahigh-performance anti-abrasion concrete |
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- 2021-12-10 CN CN202111505149.1A patent/CN114230272A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107311559A (en) * | 2017-06-05 | 2017-11-03 | 山东龙泉管道工程股份有限公司 | Waste ceramic fine concrete and preparation method thereof |
| CN109467370A (en) * | 2019-01-14 | 2019-03-15 | 湘潭大学 | A kind of high additive mixing ceramic tile aggregate C160UHPC and preparation method thereof |
| CN110818354A (en) * | 2019-11-21 | 2020-02-21 | 华东交通大学 | Ceramic particle-doped ultrahigh-performance concrete and preparation method thereof |
| CN110835251A (en) * | 2019-12-10 | 2020-02-25 | 华东交通大学 | Ultrahigh-performance concrete and preparation method thereof |
| CN111233390A (en) * | 2020-01-15 | 2020-06-05 | 中建材中岩科技有限公司 | Ultrahigh-performance anti-abrasion concrete |
Non-Patent Citations (1)
| Title |
|---|
| 岳建伟等: "《再生混凝土劲性搅拌桩试验与应用技术研究》", 30 September 2015 * |
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Application publication date: 20220325 |