CN111377690A - Preparation method of high-durability concrete for prefabricated harbor member - Google Patents
Preparation method of high-durability concrete for prefabricated harbor member Download PDFInfo
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- CN111377690A CN111377690A CN202010271354.5A CN202010271354A CN111377690A CN 111377690 A CN111377690 A CN 111377690A CN 202010271354 A CN202010271354 A CN 202010271354A CN 111377690 A CN111377690 A CN 111377690A
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
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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
-
- 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
- C04B2111/23—Acid resistance, e.g. against acid air or rain
Abstract
The invention discloses a preparation method of concrete for a high-durability prefabricated harbor component, which comprises 350 parts of Portland cement 300-90 parts, 60-90 parts of active slag powder, 80-100 parts of high-quality fly ash, 25-45 parts of silica fume, 350 parts of broken stone 300-10 mm, 900 parts of broken stone 800-25 mm, 730 parts of medium sand 690-containing material, 5.5-6.5 parts of a polycarboxylic acid high-performance water reducing agent with early strength of composite air entraining and 160 parts of water 150-containing material, wherein when the concrete for the high-durability prefabricated harbor component is prefabricated, the electric flux of 56d is less than or equal to 800 coulombs, the migration coefficient of 56d chloride is less than or equal to 2.5 × 10-12 square meters per second, and the concrete for the high-durability prefabricated harbor component has the advantages of high setting speed, good corrosion resistance, good acid resistance and alkali resistance, and capability of well ensuring the service life of construction.
Description
Technical Field
The invention relates to the technical field of preparation of high-durability concrete for prefabricated harbor members, in particular to a preparation method of the high-durability concrete for the prefabricated harbor members.
Background
Concrete, referred to as "concrete (t you ng)": refers to the general name of engineering composite materials formed by cementing aggregate into a whole by cementing materials. The term concrete generally refers to cement as the cementing material and sand and stone as the aggregate; the cement concrete, also called as common concrete, is obtained by mixing with water (which may contain additives and admixtures) according to a certain proportion and stirring, and is widely applied to civil engineering.
Concrete is one of the most important civil engineering materials of the present generation. The artificial stone is prepared by a cementing material, granular aggregate (also called aggregate), water, an additive and an admixture which are added if necessary according to a certain proportion, and is formed by uniformly stirring, compacting, forming, curing and hardening.
The most important properties of concrete mixtures. It comprehensively expresses the consistency, the fluidity, the plasticity, the anti-demixing and segregation bleeding performance, the easy-to-smear property and the like of the mixture. Methods and indexes for measuring and expressing the workability of the mixture are many, and China mainly adopts slump (millimeter) measured by a truncated cone slump cone and the Weibo time (second) measured by a Weibo instrument as main indexes of the consistency.
The most important mechanical properties of the hardened concrete refer to the ability of the concrete to resist stresses such as compression, tension, bending and shearing. The water cement ratio, the variety and the dosage of cement, the variety and the dosage of aggregate, stirring, forming and curing all directly influence the strength of concrete. The concrete is divided into 19 grades according to standard compressive strength (the cubic compressive strength which is measured by a standard test method and has 95% guarantee rate by taking a cube with the side length of 150mm as a standard test piece and curing for 28 days under standard curing conditions) called as a mark, wherein the grades are divided into C10, C15, C20, C25, C30, C35, C40, C45, C50, C55, C60, C65, C70, C75, C80, C85, C90, C95 and C100. The tensile strength of the concrete is only 1/10-1/20 of the compressive strength of the concrete. The improvement of the ratio of tensile strength to compressive strength of concrete is an important aspect of concrete modification.
At present, many harbor pier members are cast by concrete materials, but due to the particularity of harbor piers and the high corrosivity of seawater, the harbor pier members are required to have corrosion resistance and alkali resistance.
Disclosure of Invention
The invention aims to provide a preparation method of concrete for a high-durability precast harbor member, which has good corrosion resistance, acid resistance and alkali resistance and can ensure the service life of construction well, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of high-durability concrete for prefabricated harbor members comprises 350 parts of Portland cement 300-containing materials, 60-90 parts of active slag powder, 80-100 parts of high-quality fly ash, 25-45 parts of micro silicon powder, 300-10 mm broken stone 350 parts, 800-900 parts of 0-25mm broken stone, 730 parts of medium sand 690-containing materials, 5.5-6.5 parts of a composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 160 parts of water 150-containing materials.
Preferably, 320 parts of Portland cement, 80 parts of active slag powder, 90 parts of high-quality fly ash, 38 parts of micro silicon powder, 340 parts of crushed stone with the diameter of 5-10mm, 840 parts of crushed stone with the diameter of 0-25mm, 700 parts of medium sand, 6.0 parts of composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 155 parts of water.
Preferably, the 56d electric flux is less than or equal to 800 coulombs.
Preferably, the 56d chloride ion mobility coefficient is less than or equal to 2.5 × 10 square meters per square meter per second.
Preferably, the portland cement is grade 52.5.
Preferably, the active slag powder is grade S95.
Preferably, the high-quality fly ash is grade I.
Preferably, the polycarboxylic acid high-performance water reducing agent comprises
80 to 85 percent of water
14 to 17 percent of water reducing agent mother liquor
0.5 to 0.9 percent of air entraining agent
0.7 to 1.1 percent of defoaming agent
0.7 to 1.3 percent of viscosity reducer
0.7 to 1.2 percent of water-retaining agent.
Preferably, the high-durability concrete for the prefabricated harbor member is prepared by the following steps:
A. preparing materials: 320 parts of portland cement, 80 parts of active slag powder, 90 parts of high-quality fly ash, 38 parts of micro silicon powder, 340 parts of crushed stone with the thickness of 5-10mm, 840 parts of crushed stone with the thickness of 0-25mm, 700 parts of medium sand, 6.0 parts of composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 155 parts of water;
B. 3/4 water, Portland cement, high-quality fly ash, active slag powder and medium sand are mixed together and stirred for 25 seconds;
C. adding crushed stone of 5-10mm and crushed stone of 0-25mm, adding 1/4 water, polycarboxylic acid high-performance water reducing agent and coagulant, and continuing stirring for 90 seconds;
D. and standing the stirred concrete material for 60-80 s.
Compared with the prior art, the invention has the beneficial effects that:
the high-durability concrete for the prefabricated harbor member has the advantages of high solidification speed, good corrosion resistance, good acid resistance and alkali resistance, and can well guarantee the service life of construction.
Drawings
FIG. 1 is a flow chart of the method for opening holes on the surface of the filter element of the air filter of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: the concrete for the high-durability prefabricated harbor member comprises 350 parts of Portland cement 300-doped materials, 60-90 parts of active slag powder, 80-100 parts of high-quality fly ash, 25-45 parts of micro silicon powder, 350 parts of crushed stone 300-10 mm, 900 parts of crushed stone 800-25 mm, 730 parts of medium sand 690-doped materials, 5.5-6.5 parts of a composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 160 parts of water 150-doped materials.
320 parts of portland cement, 80 parts of active slag powder, 90 parts of high-quality fly ash, 38 parts of micro silicon powder, 340 parts of crushed stone with the thickness of 5-10mm, 840 parts of crushed stone with the thickness of 0-25mm, 700 parts of medium sand, 6.0 parts of composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 155 parts of water.
When the concrete for the high-durability prefabricated harbor member is prepared, the electric flux of 56d is less than or equal to 800 coulombs, the migration coefficient of 56d chloride ions is less than or equal to 2.5 × 10-12 square meters per second, 52.5 grades of Portland cement are used, the active slag powder is S95 grades, and the high-quality fly ash is I grades, wherein the used polycarboxylic acid high-performance water reducing agent comprises 80-85% of water, 14-17% of water reducing agent mother liquor, 0.5-0.9% of air entraining agent, 0.7-1.1% of defoaming agent, 0.7-1.3% of viscosity reducer and 0.7-1.2% of water retention agent.
In the case of the example 1, the following examples are given,
300 parts of Portland cement, 65 parts of active slag powder, 85 parts of high-quality fly ash, 28 parts of micro silicon powder, 310 parts of crushed stone with the thickness of 5-10mm, 820 parts of crushed stone with the thickness of 0-25mm, 700 parts of medium sand, 5.8 parts of a composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 152 parts of water.
When the concrete for the high-durability prefabricated harbor member is prepared, the electric flux of 56d is less than or equal to 800 coulombs, the migration coefficient of 56d chloride ions is less than or equal to 2.5 × 10-12 square meters per second, 52.5 grades of Portland cement are used, the active slag powder is S95 grades, and the high-quality fly ash is I grades, wherein the used polycarboxylic acid high-performance water reducing agent comprises 80-85% of water, 14-17% of water reducing agent mother liquor, 0.5-0.9% of air entraining agent, 0.7-1.1% of defoaming agent, 0.7-1.3% of viscosity reducer and 0.7-1.2% of water retention agent.
In the case of the example 2, the following examples are given,
310 parts of Portland cement, 68 parts of active slag powder, 92 parts of high-quality fly ash, 32 parts of micro silicon powder, 320 parts of crushed stone with the thickness of 5-10mm, 860 parts of crushed stone with the thickness of 0-25mm, 710 parts of medium sand, 6.0 parts of a composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 153 parts of water.
When the concrete for the high-durability prefabricated harbor member is prepared, the electric flux of 56d is less than or equal to 800 coulombs, the migration coefficient of 56d chloride ions is less than or equal to 2.5 × 10-12 square meters per second, 52.5 grades of Portland cement are used, the active slag powder is S95 grades, and the high-quality fly ash is I grades, wherein the used polycarboxylic acid high-performance water reducing agent comprises 80-85% of water, 14-17% of water reducing agent mother liquor, 0.5-0.9% of air entraining agent, 0.7-1.1% of defoaming agent, 0.7-1.3% of viscosity reducer and 0.7-1.2% of water retention agent.
In the case of the example 3, the following examples are given,
320 parts of portland cement, 70 parts of active slag powder, 94 parts of high-quality fly ash, 36 parts of micro silicon powder, 330 parts of crushed stone with the thickness of 5-10mm, 870 parts of crushed stone with the thickness of 0-25mm, 715 parts of medium sand, 6.1 parts of a composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 155 parts of water.
When the concrete for the high-durability prefabricated harbor member is prepared, the electric flux of 56d is less than or equal to 800 coulombs, the migration coefficient of 56d chloride ions is less than or equal to 2.5 × 10-12 square meters per second, 52.5 grades of Portland cement are used, the active slag powder is S95 grades, and the high-quality fly ash is I grades, wherein the used polycarboxylic acid high-performance water reducing agent comprises 80-85% of water, 14-17% of water reducing agent mother liquor, 0.5-0.9% of air entraining agent, 0.7-1.1% of defoaming agent, 0.7-1.3% of viscosity reducer and 0.7-1.2% of water retention agent.
In the case of the example 4, the following examples are given,
330 parts of Portland cement, 75 parts of active slag powder, 98 parts of high-quality fly ash, 39 parts of micro silicon powder, 335 parts of crushed stone with the thickness of 5-10mm, 880 parts of crushed stone with the thickness of 0-25mm, 720 parts of medium sand, 6.2 parts of a composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 158 parts of water.
When the concrete for the high-durability prefabricated harbor member is prepared, the electric flux of 56d is less than or equal to 800 coulombs, the migration coefficient of 56d chloride ions is less than or equal to 2.5 × 10-12 square meters per second, 52.5 grades of Portland cement are used, the active slag powder is S95 grades, and the high-quality fly ash is I grades, wherein the used polycarboxylic acid high-performance water reducing agent comprises 80-85% of water, 14-17% of water reducing agent mother liquor, 0.5-0.9% of air entraining agent, 0.7-1.1% of defoaming agent, 0.7-1.3% of viscosity reducer and 0.7-1.2% of water retention agent.
In the case of the example 5, the following examples were conducted,
340 parts of portland cement, 80 parts of active slag powder, 100 parts of high-quality fly ash, 39 parts of silica fume, 345 parts of crushed stone with the thickness of 5-10mm, 890 parts of crushed stone with the thickness of 0-25mm, 730 parts of medium sand, 6.4 parts of a composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 158 parts of water.
When the concrete for the high-durability prefabricated harbor member is prepared, the electric flux of 56d is less than or equal to 800 coulombs, the migration coefficient of 56d chloride ions is less than or equal to 2.5 × 10-12 square meters per second, 52.5 grades of Portland cement are used, the active slag powder is S95 grades, and the high-quality fly ash is I grades, wherein the used polycarboxylic acid high-performance water reducing agent comprises 80-85% of water, 14-17% of water reducing agent mother liquor, 0.5-0.9% of air entraining agent, 0.7-1.1% of defoaming agent, 0.7-1.3% of viscosity reducer and 0.7-1.2% of water retention agent.
In conclusion, when 320 parts of portland cement, 80 parts of active slag powder, 90 parts of high-quality fly ash, 38 parts of micro silicon powder, 340 parts of crushed stone with the thickness of 5-10mm, 840 parts of crushed stone with the thickness of 0-25mm, 700 parts of medium sand, 6.0 parts of polycarboxylic acid high-performance water reducing agent with composite air entraining and early strength and 155 parts of water are prepared in proportion, the prepared concrete for the high-durability prefabricated harbor member is high in solidification speed, good in corrosion resistance, good in acid resistance and alkali resistance, and capable of well guaranteeing the service life of construction.
The high-durability concrete for the prefabricated harbor member is prepared by the following steps:
A. preparing materials: 320 parts of portland cement, 80 parts of active slag powder, 90 parts of high-quality fly ash, 38 parts of micro silicon powder, 340 parts of crushed stone with the thickness of 5-10mm, 840 parts of crushed stone with the thickness of 0-25mm, 700 parts of medium sand, 6.0 parts of composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 155 parts of water;
B. 3/4 water, Portland cement, high-quality fly ash, active slag powder and medium sand are mixed together and stirred for 25 seconds;
C. adding crushed stone of 5-10mm and crushed stone of 0-25mm, adding 1/4 water, polycarboxylic acid high-performance water reducing agent and coagulant, and continuing stirring for 90 seconds;
D. and standing the stirred concrete material for 60-80 s.
In conclusion, the invention has the advantages of high solidification speed, good corrosion resistance, good acid resistance and alkali resistance, and can ensure the service life of construction.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A preparation method of high-durability concrete for prefabricated harbor members is characterized by comprising the following steps: comprises 350 parts of Portland cement, 60-90 parts of active slag powder, 80-100 parts of high-quality fly ash, 25-45 parts of micro silicon powder, 350 parts of 5-10mm broken stone, 800 parts of 0-25mm broken stone, 730 parts of medium sand 690, 5.5-6.5 parts of composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 160 parts of water 150.
2. The method for preparing the concrete for the high-durability prefabricated harbour component according to claim 1, wherein the concrete is prepared by the following steps: 320 parts of portland cement, 80 parts of active slag powder, 90 parts of high-quality fly ash, 38 parts of micro silicon powder, 340 parts of crushed stone with the thickness of 5-10mm, 840 parts of crushed stone with the thickness of 0-25mm, 700 parts of medium sand, 6.0 parts of composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 155 parts of water.
3. The method for preparing the concrete for the high-durability prefabricated harbour component according to claim 1, wherein the concrete is prepared by the following steps: the 56d electric flux is less than or equal to 800 coulombs.
4. The method for preparing the concrete for the high-durability prefabricated harbour component according to claim 1, wherein the 56d chloride ion migration coefficient is not more than 2.5 × 10-12 square meters per second.
5. The method for preparing the concrete for the high-durability prefabricated harbour component according to claim 1, wherein the concrete is prepared by the following steps: the portland cement is grade 52.5.
6. The method for preparing the concrete for the high-durability prefabricated harbour component according to claim 1, wherein the concrete is prepared by the following steps: the active slag powder is S95 grade.
7. The method for preparing the concrete for the high-durability prefabricated harbour component according to claim 1, wherein the concrete is prepared by the following steps: the high-quality fly ash is I-grade.
8. The method for preparing the concrete for the high-durability prefabricated harbour component according to claim 1, wherein the concrete is prepared by the following steps: the polycarboxylic acid high-performance water reducing agent comprises
80 to 85 percent of water
14 to 17 percent of water reducing agent mother liquor
0.5 to 0.9 percent of air entraining agent
0.7 to 1.1 percent of defoaming agent
0.7 to 1.3 percent of viscosity reducer
0.7 to 1.2 percent of water-retaining agent.
9. The concrete for high durability prefabricated harbour construction according to claim 1, wherein the concrete is formulated by the following steps:
A. preparing materials: 320 parts of portland cement, 80 parts of active slag powder, 90 parts of high-quality fly ash, 38 parts of micro silicon powder, 340 parts of crushed stone with the thickness of 5-10mm, 840 parts of crushed stone with the thickness of 0-25mm, 700 parts of medium sand, 6.0 parts of composite air-entraining early-strength polycarboxylic acid high-performance water reducing agent and 155 parts of water;
B. 3/4 water, Portland cement, high-quality fly ash, active slag powder and medium sand are mixed together and stirred for 25 seconds;
C. adding crushed stone of 5-10mm and crushed stone of 0-25mm, adding 1/4 water, polycarboxylic acid high-performance water reducing agent and coagulant, and continuing stirring for 90 seconds;
D. and standing the stirred concrete material for 60-80 s.
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| CN112341072A (en) * | 2020-11-10 | 2021-02-09 | 陕西天石实业有限责任公司 | High-fluidity concrete and preparation method thereof |
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| CN103288398A (en) * | 2013-05-15 | 2013-09-11 | 宁波市高等级公路建设指挥部 | High-performance machine-made sand marine concrete and preparation method thereof |
| CN108409252A (en) * | 2018-04-28 | 2018-08-17 | 西安建筑科技大学 | A kind of regular tenacity high durability concrete and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103288398A (en) * | 2013-05-15 | 2013-09-11 | 宁波市高等级公路建设指挥部 | High-performance machine-made sand marine concrete and preparation method thereof |
| CN108409252A (en) * | 2018-04-28 | 2018-08-17 | 西安建筑科技大学 | A kind of regular tenacity high durability concrete and preparation method thereof |
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Application publication date: 20200707 |