CN111362617A - Marine concrete admixture and preparation method thereof - Google Patents
Marine concrete admixture and preparation method thereof Download PDFInfo
- Publication number
- CN111362617A CN111362617A CN201911408378.4A CN201911408378A CN111362617A CN 111362617 A CN111362617 A CN 111362617A CN 201911408378 A CN201911408378 A CN 201911408378A CN 111362617 A CN111362617 A CN 111362617A
- Authority
- CN
- China
- Prior art keywords
- parts
- oxide
- admixture
- powder
- marine concrete
- 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.)
- Granted
Links
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
- 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
-
- 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
- C04B2103/60—Agents for protection against chemical, physical or biological attack
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a marine concrete admixture and a preparation method thereof, wherein the admixture comprises the following raw materials, by weight, 30-50 parts of sulphoaluminate cement clinker, 600 parts of manganese slag powder, 300 parts of smelting slag powder, 150 parts of ceramic powder, 20-30 parts of α microcrystalline gypsum powder, 3-4 parts of sodium methyl silicate, 2-5 parts of nano aluminum hydroxide, 8-10 parts of a regulator, 0.3-0.8 part of a water reducing agent and 1-2 parts of a carbon nano tube.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a marine concrete admixture and a preparation method thereof.
Background
With the rapid development of national economy and the proposal of the strategy of ocean forcing, a plurality of infrastructure construction projects go from offshore to open sea or even deep sea, and the requirements of the projects on the erosion resistance and the durability of concrete materials and structures are higher and higher. The concrete in the marine environment is influenced by various factors such as salt fog, erosion media, sea wave scouring, atmosphere, water, temperature and the like for a long time, and the service life of the concrete can be greatly shortened. According to research, the marine effects on the destruction of concrete structures are mainly: freeze-thaw cycling action, reinforcing steel bar corrosion action, carbonization action, alkali-aggregate reaction, acid-base corrosion action, mechanical damage action of impact wear and the like, wherein the main damage reasons are reinforcing steel bar corrosion and salt corrosion. The concrete prepared by adopting the ordinary cement and the conventional admixture can not completely meet the requirement of high durability of ocean engineering, but the concrete prepared by adopting the special high-iron phase corrosion-resistant special cement has the problems of high cost and difficult control of construction time. In order to improve the durability of the marine engineering concrete structure and prolong the service life of the infrastructure, if the marine engineering concrete admixture with low cost can be prepared by adopting industrial solid wastes as main raw materials through an ultrafine grinding technology and a chemical excitation technology and the marine engineering concrete is prepared by compounding the marine engineering concrete admixture with ordinary portland cement, the shrinkage and hydration heat of the marine engineering concrete can be reduced, and the corrosion resistance, the chloride ion permeability resistance and other functions can be improved. The preparation cost of the marine concrete can be obviously reduced, the maintenance and repair cost of marine structures can be reduced, and the marine concrete has obvious economic and social benefits.
Disclosure of Invention
The invention aims to provide a marine concrete admixture and a preparation method thereof, and aims to solve the problem that the seawater corrosion resistance of concrete prepared from the common admixture and cement in the background art can not meet the high durability requirement of marine engineering.
In order to achieve the purpose, the invention provides the following technical scheme:
the admixture for marine concrete comprises, by weight, 30-50 parts of sulphoaluminate cement clinker, 600 parts of manganese slag powder, 300 parts of smelting slag powder, 150 parts of ceramic powder, 20-30 parts of α microcrystalline gypsum powder, 3-4 parts of sodium methyl silicate, 2-5 parts of nano aluminum hydroxide, 8-10 parts of a regulator, 0.3-0.8 part of a water reducing agent and 1-2 parts of a carbon nano tube.
Further, the specific surface area of the sulphoaluminate cement clinker is 600-800m2Kg, mineral composition: 355-75 wt% of C4A, 15-30 wt% of C2S, 3-6 wt% of C4 AF; chemical components: aluminum trioxide (Al)2O3)25-40 wt%, silicon dioxide (SiO)2)3-12 wt%, 35-45 wt% of calcium oxide (CaO), and ferric oxide (Fe)2O3)1-4 wt%, sulfur trioxide (SO)3)8-16 wt%, magnesium oxide (MgO)0.5-1.5 wt%, titanium dioxide (TiO)2)0.01-0.6 wt%, potassium oxide (K)2O)0.01-0.09 wt%, sodium oxide (Na)2O)0.01-0.1wt％。
Further, the specific surface area of the manganese slag powder is 800-1000m2The superfine powder per kg comprises the following chemical components: silicon dioxide (SiO)2)40-42 wt%, aluminum trioxide (Al)2O3)10-12 wt% of ferric oxide (Fe)2O3)8-10 wt%, calcium oxide (CaO)25-28 wt%, manganese oxide (MnO)6-7 wt%, sulfur trioxide (SO)3)0 to 0.05 wt%, potassium oxide (K)2O)0-0.05 wt%, sodium oxide (Na)2O)0 to 0.06 wt%, the remainder being other impurities.
Further, the specific surface area of the smelting slag powder is 805-850m2The superfine powder per kg comprises the following chemical components: silicon dioxide (SiO)2)25-27 wt%, aluminum trioxide (Al)2O3)9-10 wt%, iron (Fe) oxide2O3)18-19 wt%, calcium oxide (CaO)36-37 wt%, magnesium oxide (MgO)4-5 wt%, potassium oxide (K)2O)0.06-0.07 wt%, sodium oxide (Na)2O)0.07-0.08 wt%, the remainder being other impurities.
Further, the specific surface area of the ceramic powder is 1000-1200m2/kg of superfine powderThe chemical composition is as follows: silicon dioxide (SiO)2)40-45 wt%, aluminum trioxide (Al)2O3)30-35 wt% of ferric oxide (Fe)2O3)2-3 wt%, calcium oxide (CaO)8-10 wt%, magnesium oxide (MgO)1-3 wt%, potassium oxide (K)2O)0-0.02 wt%, sodium oxide (Na)2O)0.01-0.03 wt%, the remainder being other impurities.
Further, the specific surface area of the α microcrystalline gypsum powder is 800-850m2Calcium sulfate hemihydrate form α (α -CaSO) in kg/kg4 1/ 2H2O) content is not less than 95%.
Furthermore, the solid content of the sodium methylsilicate is more than or equal to 30 percent, and the pH value is 12-13.
Further, the purity of the nano aluminum hydroxide reaches 99.99 percent, the average particle size is 20nm, and the specific surface area is 180000-240000m2/kg。
Further, the regulator consists of the following raw materials in parts by weight: 8-9 parts of sulfonated melamine formaldehyde resin, 16-18 parts of acrylic glycidyl ether, 25-28 parts of polymeric aluminum ferric silicate and 18-19 parts of phosphite ester.
Further, the water reducing agent is a powder water reducing agent and is composed of the following raw materials in parts by weight: 1-2 parts of polydimethylsiloxane, 1-2 parts of ethylene glycol siloxane, 2-3 parts of sodium dodecyl benzene sulfonate and 18-20 parts of melamine formaldehyde polycondensate.
Further, the diameter of the carbon nano tube is 2-100nm, and the length is 500-800 nm.
The invention also provides a preparation method of the marine concrete admixture, which comprises the following steps:
(1) adding α microcrystalline gypsum powder 20-30 parts, nano aluminum hydroxide 2-5 parts, regulator 8-10 parts, water reducer 0.3-0.8 part and carbon nano tube 1-2 parts into a homogenizer A for homogenizing and stirring, and adding sodium methyl silicate 3-4 parts in an internal spraying manner during homogenizing and stirring to obtain a mixture A, wherein the rotation speed of the homogenizer is 1700 plus 1800r/min, and the homogenizing and stirring is carried out for 6-8 min;
(2) adding 30-50 parts of sulphoaluminate cement clinker, 600 parts of manganese slag powder 500-; the rotation speed of the homogenizer is 200 and 250r/min, and the uniform stirring is carried out for 6-7 min;
(3) adding the mixture A obtained from P1 into a homogenizer B and a mixture B obtained from P2, homogenizing and stirring at the rotation speed of the homogenizer of 200 and 250r/min, and uniformly stirring for 4-5 min; thus obtaining the marine concrete admixture.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can utilize industrial solid wastes such as manganese slag, smelting slag, ceramic powder and the like on a large scale, greatly reduces the manufacturing cost of the marine concrete admixture, reduces the environmental pollution, and is economic and environment-friendly.
2. In addition, the added nano aluminum hydroxide, carbon nano tubes and sodium methyl silicate can promote depolymerization and repolymerization of the silicon-aluminum-oxygen tetrahedron of the industrial waste residue, so that the secondary reaction structure is more compact, the hydration products are more uniform, and the chloride ion permeability resistance, seawater erosion resistance and sulfate erosion resistance of the matrix are greatly improved.
3. By adding the regulator and the water reducing agent, the obtained marine concrete admixture has low water demand and good adaptability with other materials.
4. The marine concrete admixture has simple preparation process, and only needs to homogenize the sulphoaluminate cement clinker with certain fineness, the solid waste material and the additive, and the raw materials are cheap and easy to obtain, thereby having higher application value.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1
The admixture for the marine concrete comprises, by weight, 30 parts of sulphoaluminate cement clinker, 500 parts of manganese slag powder, 200 parts of smelting slag powder, 100 parts of ceramic powder, 20 parts of α microcrystalline gypsum powder, 3 parts of sodium methylsilicate, 2 parts of nano aluminum hydroxide, 8 parts of a regulator, 0.3 part of a water reducing agent and 1 part of a carbon nano tube.
The specific surface area of the sulphoaluminate cement clinker is 600-800m2Kg, mineral composition: 355-75 wt% of C4A, 15-30 wt% of C2S, 3-6 wt% of C4 AF; chemical components: aluminum trioxide (Al)2O3)25-40 wt%, silicon dioxide (SiO)2)3-12 wt%, 35-45 wt% of calcium oxide (CaO), and ferric oxide (Fe)2O3)1-4 wt%, sulfur trioxide (SO)3)8-16 wt%, magnesium oxide (MgO)0.5-1.5 wt%, titanium dioxide (TiO)2)0.01-0.6 wt%, potassium oxide (K)2O)0.01-0.09 wt%, sodium oxide (Na)2O)0.01-0.1wt％。
The specific surface area of the manganese slag powder is 800-1000m2The superfine powder per kg comprises the following chemical components: silicon dioxide (SiO)2)40-42 wt%, aluminum trioxide (Al)2O3)10-12 wt% of ferric oxide (Fe)2O3)8-10 wt%, calcium oxide (CaO)25-28 wt%, manganese oxide (MnO)6-7 wt%, sulfur trioxide (SO)3)0 to 0.05 wt%, potassium oxide (K)2O)0-0.05 wt%, sodium oxide (Na)2O)0 to 0.06 wt%, the remainder being other impurities.
The specific surface area of the smelting slag powder is 805-850m2The superfine powder per kg comprises the following chemical components: silicon dioxide (SiO)2)25-27 wt%, aluminum trioxide (Al)2O3)9-10 wt%, iron (Fe) oxide2O3)18-19 wt%, calcium oxide (CaO)36-37 wt%, magnesium oxide (MgO)4-5 wt%, potassium oxide (K)2O)0.06-0.07 wt%, sodium oxide (Na)2O)0.07-0.08 wt%, the remainder being other impurities.
The specific surface area of the ceramic powder is 1000-1200m2The superfine powder per kg comprises the following chemical components: silicon dioxide (SiO)2)40-45 wt%, aluminum trioxide (Al)2O3)30-35 wt% of ferric oxide (Fe)2O3)2-3 wt%, calcium oxide (CaO)8-10 wt%, magnesium oxide (MgO)1-3 wt%, potassium oxide (K)2O)0-0.02 wt%, sodium oxide (Na)2O)0.01-0.03 wt%, the remainder being other impurities.
The specific surface area of the α microcrystalline gypsum powder is 800-850m2Calcium sulfate hemihydrate form α (α -CaSO) in kg/kg4 1/2H2O) content is not less than 95%.
The solid content of the sodium methylsilicate is more than or equal to 30 percent, and the PH value is 12-13.
The purity of the nano aluminum hydroxide reaches 99.99 percent, the average particle size is 20nm, and the specific surface area is 180000-240000m2/kg。
The regulator consists of the following raw materials in parts by weight: 8 parts of sulfonated melamine formaldehyde resin, 16 parts of acrylic glycidyl ether, 25 parts of polymeric aluminum ferric silicate and 18 parts of phosphite ester.
The water reducing agent is a powder water reducing agent and is composed of the following raw materials in parts by weight: 1 part of polydimethylsiloxane, 1 part of ethylene glycol siloxane, 2 parts of sodium dodecyl benzene sulfonate and 18 parts of melamine formaldehyde polycondensate.
The diameter of the carbon nano tube is 2-100nm, and the length is 500-800 nm.
Example 1 a method of making a marine concrete admixture, comprising the steps of:
(1) adding α microcrystalline gypsum powder 20 parts, nano aluminum hydroxide 2 parts, regulator 8 parts, water reducer 0.3 parts and carbon nano tube 1 part into a homogenizer A for homogenizing and stirring, and adding sodium methyl silicate 3 parts in an internal spraying manner during the homogenizing and stirring process to obtain a mixture A, wherein the rotating speed of the homogenizer is 1700 plus 1800r/min, and the homogenizing and stirring is carried out for 6-8 min;
(2) adding 30 parts of sulphoaluminate cement clinker, 500 parts of manganese slag powder, 200 parts of smelting slag powder and 100 parts of ceramic powder into a homogenizer B for homogenizing and stirring to obtain a mixture B; the rotation speed of the homogenizer is 200 and 250r/min, and the uniform stirring is carried out for 6-7 min;
(3) adding the mixture A obtained from P1 into a homogenizer B and a mixture B obtained from P2, homogenizing and stirring at the rotation speed of the homogenizer of 200 and 250r/min, and uniformly stirring for 4-5 min; thus obtaining the marine concrete admixture.
Example 2
The admixture for the marine concrete comprises, by weight, 50 parts of sulphoaluminate cement clinker, 600 parts of manganese slag powder, 300 parts of smelting slag powder, 150 parts of ceramic powder, 30 parts of α microcrystalline gypsum powder, 4 parts of sodium methylsilicate, 5 parts of nano-aluminum hydroxide, 10 parts of a regulator, 0.8 part of a water reducing agent and 2 parts of a carbon nano tube.
The specific surface area of the sulphoaluminate cement clinker is 600-800m2Kg, mineral composition: 355-75 wt% of C4A, 15-30 wt% of C2S, 3-6 wt% of C4 AF; chemical components: aluminum trioxide (Al)2O3)25-40 wt%, silicon dioxide (SiO)2)3-12 wt%, 35-45 wt% of calcium oxide (CaO), and ferric oxide (Fe)2O3)1-4 wt%, sulfur trioxide (SO)3)8-16 wt%, magnesium oxide (MgO)0.5-1.5 wt%, titanium dioxide (TiO)2)0.01-0.6 wt%, potassium oxide (K)2O)0.01-0.09 wt%, sodium oxide (Na)2O)0.01-0.1wt％。
The specific surface area of the manganese slag powder is 800-1000m2The superfine powder per kg comprises the following chemical components: silicon dioxide (SiO)2)40-42 wt%, aluminum trioxide (Al)2O3)10-12 wt% of ferric oxide (Fe)2O3)8-10 wt%, calcium oxide (CaO)25-28 wt%, manganese oxide (MnO)6-7 wt%, sulfur trioxide (SO)3)0 to 0.05 wt%, potassium oxide (K)2O)0-0.05 wt%, sodium oxide (Na)2O)0 to 0.06 wt%, the remainder being other impurities.
The specific surface area of the smelting slag powder is 805-850m2The superfine powder per kg comprises the following chemical components: silicon dioxide (SiO)2)25-27 wt%, aluminum trioxide (Al)2O3)9-10 wt%, iron (Fe) oxide2O3)18-19 wt%, calcium oxide (CaO)36-37 wt%, magnesium oxide (MgO)4-5 wt%, potassium oxide (K)2O)0.06-0.07 wt%, sodium oxide (Na)2O)0.07-0.08 wt%, the remainder being other impurities.
The specific surface area of the ceramic powder is 1000-1200m2The superfine powder per kg comprises the following chemical components: silicon dioxide (SiO)2)40-45 wt%, IIIAlumina (Al)2O3)30-35 wt% of ferric oxide (Fe)2O3)2-3 wt%, calcium oxide (CaO)8-10 wt%, magnesium oxide (MgO)1-3 wt%, potassium oxide (K)2O)0-0.02 wt%, sodium oxide (Na)2O)0.01-0.03 wt%, the remainder being other impurities.
The specific surface area of the α microcrystalline gypsum powder is 800-850m2Calcium sulfate hemihydrate form α (α -CaSO) in kg/kg4 1/2H2O) content is not less than 95%.
The solid content of the sodium methylsilicate is more than or equal to 30 percent, and the PH value is 12-13.
The purity of the nano aluminum hydroxide reaches 99.99 percent, the average particle size is 20nm, and the specific surface area is 180000-240000m2/kg。
The regulator consists of the following raw materials in parts by weight: 9 parts of sulfonated melamine formaldehyde resin, 18 parts of acrylic glycidyl ether, 28 parts of polymeric aluminum ferric silicate and 19 parts of phosphite ester.
The water reducing agent is a powder water reducing agent and is composed of the following raw materials in parts by weight: 2 parts of polydimethylsiloxane, 2 parts of ethylene glycol siloxane, 3 parts of sodium dodecyl benzene sulfonate and 20 parts of melamine formaldehyde polycondensate.
The diameter of the carbon nano tube is 2-100nm, and the length is 500-800 nm.
Example 2 a method of making a marine concrete admixture, comprising the steps of:
(1) adding α microcrystalline gypsum powder 30 parts, nano aluminum hydroxide 5 parts, regulator 10 parts, water reducer 0.8 parts and carbon nano tube 2 parts into a homogenizer A for homogenizing and stirring, and adding sodium methyl silicate 4 parts in an internal spraying manner during the homogenizing and stirring process to obtain a mixture A, wherein the rotation speed of the homogenizer is 1700 plus 1800r/min, and the homogenizing and stirring is carried out for 6-8 min;
(2) adding 50 parts of sulphoaluminate cement clinker, 600 parts of manganese slag powder, 300 parts of smelting slag powder and 150 parts of ceramic powder into a homogenizer B for homogenizing and stirring to obtain a mixture B; the rotation speed of the homogenizer is 200 and 250r/min, and the uniform stirring is carried out for 6-7 min;
(3) adding the mixture A obtained from P1 into a homogenizer B and a mixture B obtained from P2, homogenizing and stirring at the rotation speed of the homogenizer of 200 and 250r/min, and uniformly stirring for 4-5 min; thus obtaining the marine concrete admixture.
Example 3
The admixture for the marine concrete comprises, by weight, 40 parts of sulphoaluminate cement clinker, 560 parts of manganese slag powder, 270 parts of smelting slag powder, 130 parts of ceramic powder, 25 parts of α microcrystalline gypsum powder, 3.5 parts of sodium methylsilicate, 3 parts of nano-aluminum hydroxide, 8.8 parts of a regulator, 0.5 part of a water reducing agent and 1.5 parts of a carbon nano tube.
The specific surface area of the sulphoaluminate cement clinker is 600-800m2Kg, mineral composition: 355-75 wt% of C4A, 15-30 wt% of C2S, 3-6 wt% of C4 AF; chemical components: aluminum trioxide (Al)2O3)25-40 wt%, silicon dioxide (SiO)2)3-12 wt%, 35-45 wt% of calcium oxide (CaO), and ferric oxide (Fe)2O3)1-4 wt%, sulfur trioxide (SO)3)8-16 wt%, magnesium oxide (MgO)0.5-1.5 wt%, titanium dioxide (TiO)2)0.01-0.6 wt%, potassium oxide (K)2O)0.01-0.09 wt%, sodium oxide (Na)2O)0.01-0.1wt％。
The specific surface area of the manganese slag powder is 800-1000m2The superfine powder per kg comprises the following chemical components: silicon dioxide (SiO)2)40-42 wt%, aluminum trioxide (Al)2O3)10-12 wt% of ferric oxide (Fe)2O3)8-10 wt%, calcium oxide (CaO)25-28 wt%, manganese oxide (MnO)6-7 wt%, sulfur trioxide (SO)3)0 to 0.05 wt%, potassium oxide (K)2O)0-0.05 wt%, sodium oxide (Na)2O)0 to 0.06 wt%, the remainder being other impurities.
The specific surface area of the smelting slag powder is 805-850m2The superfine powder per kg comprises the following chemical components: silicon dioxide (SiO)2)25-27 wt%, aluminum trioxide (Al)2O3)9-10 wt%, iron (Fe) oxide2O3)18-19 wt%, calcium oxide (CaO)36-37 wt%, magnesium oxide (MgO)4-5 wt%, potassium oxide (K)2O)0.06-0.07 wt%, sodium oxide (Na)2O)0.07-0.08 wt%, the remainder being other impurities.
The specific surface area of the ceramic powder is 1000-1200m2The superfine powder per kg comprises the following chemical components: silicon dioxide (S)iO2)40-45 wt%, aluminum trioxide (Al)2O3)30-35 wt% of ferric oxide (Fe)2O3)2-3 wt%, calcium oxide (CaO)8-10 wt%, magnesium oxide (MgO)1-3 wt%, potassium oxide (K)2O)0-0.02 wt%, sodium oxide (Na)2O)0.01-0.03 wt%, the remainder being other impurities.
The specific surface area of the α microcrystalline gypsum powder is 800-850m2Calcium sulfate hemihydrate form α (α -CaSO) in kg/kg4 1/2H2O) content is not less than 95%.
The solid content of the sodium methylsilicate is more than or equal to 30 percent, and the PH value is 12-13.
The purity of the nano aluminum hydroxide reaches 99.99 percent, the average particle size is 20nm, and the specific surface area is 180000-240000m2/kg。
The regulator consists of the following raw materials in parts by weight: 8.5 parts of sulfonated melamine formaldehyde resin, 17 parts of acrylic glycidyl ether, 27 parts of polymeric aluminum ferric silicate and 18.5 parts of phosphite ester.
The water reducing agent is a powder water reducing agent and is composed of the following raw materials in parts by weight: 1.5 parts of polydimethylsiloxane, 1.5 parts of ethylene glycol siloxane, 2.5 parts of sodium dodecyl benzene sulfonate and 19 parts of melamine formaldehyde polycondensate.
The diameter of the carbon nano tube is 2-100nm, and the length is 500-800 nm.
Example 3 a method of making a marine concrete admixture, comprising the steps of:
(1) adding 25 parts of α microcrystalline gypsum powder, 3 parts of nano aluminum hydroxide, 8.8 parts of regulator, 0.5 part of water reducer and 1.5 parts of carbon nano tube into a homogenizer A for homogenizing and stirring, wherein 3.5 parts of sodium methyl silicate is added in an internal spraying manner during the homogenizing and stirring process to obtain a mixture A, wherein the rotating speed of the homogenizer is 1700 plus 1800r/min, and the homogenizing and stirring is carried out for 6-8 min;
(2) adding 40 parts of sulphoaluminate cement clinker, 560 parts of manganese slag powder, 270 parts of smelting slag powder and 130 parts of ceramic powder into a homogenizer B for homogenizing and stirring to obtain a mixture B; the rotation speed of the homogenizer is 200 and 250r/min, and the uniform stirring is carried out for 6-7 min;
(3) adding the mixture A obtained from P1 into a homogenizer B and a mixture B obtained from P2, homogenizing and stirring at the rotation speed of the homogenizer of 200 and 250r/min, and uniformly stirring for 4-5 min; thus obtaining the marine concrete admixture.
Comparative example 1
The difference from the example 3 is that the manganese slag powder, the smelting slag powder and the ceramic powder used in the comparative example 1 are all commercial common powder which is not subjected to superfine grinding, and the specific surface area is 400-500m2/kg。
Comparative example 2
The difference from example 3 is that the aluminum hydroxide used in comparative example 2 is non-nanoscale aluminum hydroxide.
Comparative example 3
Unlike example 3, comparative example 3 does not use sodium methyl silicate.
Comparative example 4
The difference from example 3 is that comparative example 4 does not use carbon nanotubes.
Comparative example 5
Comparative example 5 is a blank control without marine concrete admixture.
And (3) performance testing:
the concrete with the same mixing ratio of C40 was used as the test object, wherein the addition amount of the marine concrete admixture in the inventive examples 1-3 and the comparative examples 1-4 in the concrete was 40% of the total amount of the cementitious material in the concrete, and the comparative example 5 was a blank control group.
1. Testing of influence of working performance, mechanical property and corrosion resistance
Working performance, mechanical property and corrosion resistance are tested according to GB/T50080-2016 standard on test method for common concrete mixture performance, GB/T50081-2016 standard on test method for common concrete mechanical property, GB/T50082-2009 standard on test method for long-term performance and durability of common concrete and GB/T749-2008 method for test method for sulfate corrosion resistance of cement.
Table 1:
as can be seen from Table 1, the concrete added with the marine concrete admixture of the embodiments 1-3 of the present invention has good working performance and high strength retention rate; the electric flux and the chloride ion diffusion coefficient are obviously lower than those of a blank control group, and the sulfate erosion resistance coefficient is greatly improved; the effect is better than that of the concrete in the comparative examples 1-5, and therefore, the corrosion resistance of the marine concrete can be effectively improved by adding the nano aluminum hydroxide, the sodium methyl silicate and the carbon nano tube into the industrial solid waste raw materials in the marine concrete admixture through the ultrafine grinding.
2. Test of freeze-thaw cycle and soaking-drying cycle
The freeze-thaw cycle and the soaking and drying cycle experiments are tested according to GB/T50082-2009 Standard test method for long-term performance and durability of common concrete.
Table 2:
as can be seen from table 2, the admixture for marine concrete in examples 1 to 3 of the present invention can effectively increase the times of freeze thawing resistance and soaking and drying cycle of marine concrete, and are better than those in comparative examples 1 to 5, it can be seen that the performance of the admixture for marine concrete can be effectively improved by adding nano aluminum hydroxide, sodium methyl silicate and carbon nanotubes to the industrial solid waste raw materials in the admixture for marine concrete through ultra-fine grinding, and the prepared admixture for marine concrete has better environmental adaptability.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (12)
1. The marine concrete admixture is characterized by comprising the following raw materials, by weight, 30-50 parts of sulphoaluminate cement clinker, 600 parts of manganese slag powder, 300 parts of smelting slag powder, 150 parts of ceramic powder, 20-30 parts of α microcrystalline gypsum powder, 3-4 parts of sodium methyl silicate, 2-5 parts of nano aluminum hydroxide, 8-10 parts of a regulator, 0.3-0.8 part of a water reducing agent and 1-2 parts of a carbon nano tube.
2. The admixture for marine concrete as defined in claim 1, wherein said specific surface area of said sulphoaluminate cement clinker is 600-800m2Kg, mineral composition: 355-75 wt% of C4A, 78-30 wt% of C2S15 and 3-6 wt% of C4AF 3; chemical components: aluminum trioxide (Al)2O3)25-40 wt%, silicon dioxide (SiO)2)3-12 wt%, 35-45 wt% of calcium oxide (CaO), and ferric oxide (Fe)2O3)1-4 wt%, sulfur trioxide (SO)3)8-16 wt%, magnesium oxide (MgO)0.5-1.5 wt%, titanium dioxide (TiO)2)0.01-0.6 wt%, potassium oxide (K)2O)0.01-0.09 wt%, sodium oxide (Na)2O)0.01-0.1wt％。
3. The admixture for marine concrete as defined in claim 1, wherein said manganese slag powder has a specific surface area of 800-2The superfine powder per kg comprises the following chemical components: silicon dioxide (SiO)2)40-42 wt%, aluminum trioxide (Al)2O3)10-12 wt% of ferric oxide (Fe)2O3)8-10 wt%, calcium oxide (CaO)25-28 wt%, manganese oxide (MnO)6-7 wt%, sulfur trioxide (SO)3)0 to 0.05 wt%, potassium oxide (K)2O)0-0.05 wt%, sodium oxide (Na)2O)0 to 0.06 wt%, the remainder being other impurities.
4. The admixture for marine concrete as claimed in claim 1, wherein said specific surface area of said smelted slag powder is 805-850m2The superfine powder per kg comprises the following chemical components: silicon dioxide (SiO)2)25-27 wt%, aluminum trioxide (Al)2O3)9-10 wt%, iron (Fe) oxide2O3)18-19 wt%, calcium oxide (CaO)36-37 wt%, magnesium oxide (MgO)4-5 wt%, potassium oxide (K)2O)0.06-0.07 wt%, sodium oxide (Na)2O)0.07-0.08 wt%, the remainder being other impurities.
5. The marine concrete admixture as claimed in claim 1Characterized in that the specific surface area of the ceramic powder is 1000-1200m2The superfine powder per kg comprises the following chemical components: silicon dioxide (SiO)2)40-45 wt%, aluminum trioxide (Al)2O3)30-35 wt% of ferric oxide (Fe)2O3)2-3 wt%, calcium oxide (CaO)8-10 wt%, magnesium oxide (MgO)1-3 wt%, potassium oxide (K)2O)0-0.02 wt%, sodium oxide (Na)2O)0.01-0.03 wt%, the remainder being other impurities.
6. The admixture for marine concrete as claimed in claim 1, wherein said α microcrystalline gypsum powder has a specific surface area of 800-2Calcium sulfate hemihydrate form α (α -CaSO) in kg/kg4 1/2H2O) content is not less than 95%.
7. The admixture for marine concrete as claimed in claim 1, wherein said sodium methylsilicate has a solid content of 30% or more and a pH of 12-13.
8. The admixture for marine concrete as claimed in claim 1, wherein said nano aluminum hydroxide has a purity of 99.99%, an average particle size of 20nm, a specific surface area of 180000-240000m2/kg。
9. The admixture for marine concrete as claimed in claim 1, wherein said modifier is composed of the following raw materials by weight: 8-9 parts of sulfonated melamine formaldehyde resin, 16-18 parts of acrylic glycidyl ether, 25-28 parts of polymeric aluminum ferric silicate and 18-19 parts of phosphite ester.
10. The admixture for marine concrete of claim 1, wherein the water reducing agent is a powder water reducing agent and comprises the following raw materials in parts by weight: 1-2 parts of polydimethylsiloxane, 1-2 parts of ethylene glycol siloxane, 2-3 parts of sodium dodecyl benzene sulfonate and 18-20 parts of melamine formaldehyde polycondensate.
11. The admixture for marine concrete as defined in claim 1, wherein said carbon nanotubes have a diameter of 2-100nm and a length of 500-800 nm.
12. The method for preparing the marine concrete admixture according to claim 1, wherein the method comprises the following steps:
(1) adding α microcrystalline gypsum powder 20-30 parts, nano aluminum hydroxide 2-5 parts, regulator 8-10 parts, water reducer 0.3-0.8 part and carbon nano tube 1-2 parts into a homogenizer A for homogenizing and stirring, and adding sodium methyl silicate 3-4 parts in an internal spraying manner during homogenizing and stirring to obtain a mixture A, wherein the rotation speed of the homogenizer is 1700 plus 1800r/min, and the homogenizing and stirring is carried out for 6-8 min;
(2) adding 30-50 parts of sulphoaluminate cement clinker, 600 parts of manganese slag powder 500-; the rotation speed of the homogenizer is 200 and 250r/min, and the uniform stirring is carried out for 6-7 min;
(3) adding the mixture A obtained from P1 into a homogenizer B and a mixture B obtained from P2, homogenizing and stirring at the rotation speed of the homogenizer of 200 and 250r/min, and uniformly stirring for 4-5 min; thus obtaining the marine concrete admixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911408378.4A CN111362617B (en) | 2019-12-31 | 2019-12-31 | Marine concrete admixture and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911408378.4A CN111362617B (en) | 2019-12-31 | 2019-12-31 | Marine concrete admixture and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111362617A true CN111362617A (en) | 2020-07-03 |
| CN111362617B CN111362617B (en) | 2022-01-04 |
Family
ID=71204169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911408378.4A Active CN111362617B (en) | 2019-12-31 | 2019-12-31 | Marine concrete admixture and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111362617B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508557A (en) * | 2009-04-09 | 2009-08-19 | 中国铁道科学研究院铁道建筑研究所 | Blending material for high-early-strength concrete |
| KR20130061449A (en) * | 2011-12-01 | 2013-06-11 | 대림산업 주식회사 | Mineral admixture for concrete strength promotion, and high early strength type marine concrete containing the same |
| CN104591623A (en) * | 2015-01-06 | 2015-05-06 | 安徽省无为县泉塘预制厂 | Concrete special for marine environment |
| CN106927701A (en) * | 2017-03-28 | 2017-07-07 | 华润水泥技术研发有限公司 | A kind of special composite gelled material of maritime concrete and its production method and purposes |
| CN109851269A (en) * | 2019-01-24 | 2019-06-07 | 广东新业混凝土有限公司 | A kind of composite blend improving normal concrete durability by improving gradation |
-
2019
- 2019-12-31 CN CN201911408378.4A patent/CN111362617B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508557A (en) * | 2009-04-09 | 2009-08-19 | 中国铁道科学研究院铁道建筑研究所 | Blending material for high-early-strength concrete |
| KR20130061449A (en) * | 2011-12-01 | 2013-06-11 | 대림산업 주식회사 | Mineral admixture for concrete strength promotion, and high early strength type marine concrete containing the same |
| CN104591623A (en) * | 2015-01-06 | 2015-05-06 | 安徽省无为县泉塘预制厂 | Concrete special for marine environment |
| CN106927701A (en) * | 2017-03-28 | 2017-07-07 | 华润水泥技术研发有限公司 | A kind of special composite gelled material of maritime concrete and its production method and purposes |
| CN109851269A (en) * | 2019-01-24 | 2019-06-07 | 广东新业混凝土有限公司 | A kind of composite blend improving normal concrete durability by improving gradation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111362617B (en) | 2022-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102279625B1 (en) | Concrete composition comprising rapid cooled furnace slag and slowly cooled furnace slag powder and concrete structures manufactured using the same | |
| CN110746165A (en) | Ocean engineering repair mortar and preparation method thereof | |
| CN108409252A (en) | A kind of regular tenacity high durability concrete and preparation method thereof | |
| CN113698117B (en) | Solid waste based high-iron sulphoaluminate marine gelled material and preparation method and application thereof | |
| CN101708985A (en) | Quick-hardening high-early strength concrete-based composite material for maritime work | |
| CN115093150B (en) | Modifier for improving setting and hardening properties and carbonization resistance of phosphogypsum-based cementing material | |
| CN110255951B (en) | Barium-based chloride ion curing agent and preparation method and application thereof | |
| CN102515617B (en) | Concrete anti-corrosion etching resisting agent and preparation method thereof | |
| KR101619288B1 (en) | Cement for water proof and anticorrosive and method of manufacture thereof | |
| CN109912243B (en) | Cement produced by utilizing industrial solid wastes | |
| CN110183136B (en) | Concrete corrosion and rust inhibitor and preparation method thereof | |
| CN105669072A (en) | High performance concrete composite admixture produced by high silicon iron tailings | |
| CN105198336A (en) | Seashore building cement resisting strong wind and big waves | |
| CN113860781A (en) | Industrial solid waste admixture for ultra-high performance concrete and preparation method thereof | |
| CN108117289B (en) | Aluminophosphate-based marine cementing material | |
| CN103145362B (en) | A kind of industrial residue prepares the method for cement concrete hardening accelerator | |
| CN110550916A (en) | Corrosion-resistant PHC pipe pile and preparation method thereof | |
| CN113998960A (en) | Modified micro-nano composite superfine admixture high-durability anti-crack concrete and preparation method thereof | |
| CN112142412A (en) | Air-cooled inactive steel slag gypsum-based self-leveling mortar and preparation method thereof | |
| CN110950554B (en) | High-corrosion-resistance low-shrinkage portland cement for ocean engineering and preparation method thereof | |
| CN110790526A (en) | Marine engineering cement and production method thereof | |
| Ming et al. | Experimental research of concrete with steel slag powder and zeolite powder | |
| CN106810135A (en) | A kind of concrete mineral admixture and the mortar containing it | |
| CN110451840B (en) | Composite type compacting agent | |
| CN107892533A (en) | A kind of waterfront structure Grouting Cement mortar and its production method |
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 | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ming Yang Inventor after: Liu Chao Inventor after: Chen Ping Inventor after: Li Ling Inventor after: Chen Xuandong Inventor after: Liu Rongjin Inventor after: Zhao Yanrong Inventor after: Wei Jiazhan Inventor after: Tan Bo Inventor after: Wang Rui Inventor before: Yang Ming Inventor before: Liu Chao Inventor before: Chen Ping Inventor before: Li Ling Inventor before: Chen Xuandong Inventor before: Liu Rongjin Inventor before: Zhao Yanrong Inventor before: Wei Jiazhan Inventor before: Tan Bo Inventor before: Wang Rui |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20200703 Assignee: Guangxi Yuanming New Material Technology Co.,Ltd. Assignor: GUILIN University OF TECHNOLOGY Contract record no.: X2022450000146 Denomination of invention: A marine concrete admixture and its preparation method Granted publication date: 20220104 License type: Common License Record date: 20221123 Application publication date: 20200703 Assignee: Guilin Yuanming Technology Co.,Ltd. Assignor: GUILIN University OF TECHNOLOGY Contract record no.: X2022450000148 Denomination of invention: A marine concrete admixture and its preparation method Granted publication date: 20220104 License type: Common License Record date: 20221123 |
|
| EE01 | Entry into force of recordation of patent licensing contract |