CN111003999A - Hybrid nano particle enhanced ecological pervious concrete and preparation method thereof - Google Patents
Hybrid nano particle enhanced ecological pervious concrete and preparation method thereof Download PDFInfo
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0081—Uses not provided for elsewhere in C04B2111/00 as catalysts or catalyst carriers
- C04B2111/00827—Photocatalysts
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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
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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
- C04B2111/40—Porous or lightweight materials
-
- 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
Abstract
The invention discloses hybrid nanoparticle reinforced ecological pervious concrete and a preparation method thereof, wherein the ecological pervious concrete comprises 200-350 parts of cement, 15-60 parts of fly ash, 200-900 parts of broken stone, 200-800 parts of waste glass aggregate, 0.02-0.06 part of cellulose ether, 0.05-0.3 part of fatty alcohol emulsion, 3-15 parts of nano titanium dioxide, 12-25 parts of a hybrid nanoparticle solution and 60-120 parts of water; the preparation method of the concrete comprises the following steps: (1) uniformly mixing water, nano titanium dioxide and waste glass aggregate to obtain a mixture; (2) preparing a hybrid nanoparticle solution; (3) adding cement, fly ash, broken stone, cellulose ether, fatty alcohol emulsion and a hybrid nano particle solution into the mixture obtained in the step (1) and stirring; (4) and (3) pouring the product obtained in the step (2) into a mould, curing for 7-28 days, and demoulding to obtain the hybrid nano particle reinforced ecological pervious concrete. The concrete can improve the degradation effect of pervious concrete on pollutants, the corrosion resistance coefficient of the pervious concrete reaches 96%, the water permeability coefficient reaches 5.1mm/s, and the 28d compressive strength reaches 35.5 Mpa.
Description
Technical Field
The invention relates to ecological pervious concrete and a preparation method thereof, and particularly relates to hybrid nano particle reinforced ecological pervious concrete and a preparation method thereof.
Background
Road pavement of the pervious concrete can realize rainwater penetration, reduce surface runoff and relieve urban heat island effect. The pervious concrete is a porous concrete material, and a skeleton-pore structure is formed by wrapping aggregate by cement slurry, wherein the aggregate is usually single-grain-diameter coarse aggregate. Because the hardened slurry among aggregates is thin, strength collapse is easy to occur in the service process, and in order to overcome the defect, component materials for improving the durability of the hardened slurry are usually required to be added. Meanwhile, the nano titanium dioxide has a certain degradation function on nitrogen oxides in air under the photocatalysis effect, so that the nano titanium dioxide is added into the pervious concrete in order to further improve the ecological environment-friendly performance of the pervious concrete and provide the pervious concrete with a function of purifying pollutants. However, for pervious concrete, most of light effects are concentrated on the surface of concrete due to the impermeability of cementing materials and traditional aggregates, and only reflection and scattering of inner hole walls are relied on, so that the intensity of introduced light is limited, and the integral purification function of pervious concrete is limited.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide the hybrid nano particle reinforced ecological pervious concrete which has good long-term performance and durability, good internal light-inducing effect and can fully play the degradation role of nano titanium dioxide; the invention also aims to provide a preparation method of the ecological pervious concrete.
The technical scheme is as follows: the invention relates to hybrid nano particle reinforced ecological pervious concrete, which comprises the following components in parts by weight: 200-350 parts of cement, 15-60 parts of fly ash, 200-900 parts of broken stone, 200-800 parts of waste glass aggregate, 0.02-0.06 part of cellulose ether, 0.05-0.3 part of fatty alcohol emulsion, 3-15 parts of nano titanium dioxide, 12-25 parts of hybrid nano particle solution and 60-120 parts of water.
Wherein the hybrid nano particle solution and the hybrid nano particle solution are prepared from an aminated nano silicon dioxide solution and a water reducing agent solution, the particle size of the amino nano silicon dioxide in the aminated nano silicon dioxide solution is 20-60 nm, the water reducing agent is added in the hybrid nano particle solution, the dispersion performance of the nano particles in slurry during stirring can be improved, and in the stirring stage and the hydration stage, the water reducing agent molecules falling off from the surfaces of the hybrid nano particles play roles in dispersing cement and optimizing the interface of a hydration product, the water reducing agent is a polycarboxylic acid water reducing agent, the cement is ordinary portland cement, the strength grade is 52.5, the fly ash is I-grade fly ash or II-grade fly ash, the crushed stone is single-stage-prepared, the particle size is 5-15 mm, the particle size of waste glass aggregate is 5-10 mm, the crystal form of the nano titanium dioxide is anatase, and the particle size is 10-80 nm.
The preparation method of the hybrid nano particle reinforced ecological pervious concrete comprises the following steps:
(1) uniformly mixing water, nano titanium dioxide and waste glass aggregate to obtain a mixture;
(2) preparing a hybrid nanoparticle solution;
(3) adding cement, fly ash, broken stone, cellulose ether, fatty alcohol emulsion and a hybrid nano particle solution into the mixture obtained in the step (1) and stirring;
(4) and (3) pouring the product obtained in the step (2) into a mould, curing for 7-28 days, and demoulding to obtain the hybrid nano particle reinforced ecological pervious concrete.
Wherein the step 2 for preparing the hybrid nano particle solution comprises the following steps:
(21) adding 15-20 parts of aminated nano-silica into 85-90 parts of water, and ultrasonically oscillating for 1-2 hours to obtain an aminated nano-silica solution;
(22) slowly dripping 10-12 parts of water reducing agent solution with the mass solubility of 10% -15% into the aminated nano silicon dioxide solution within 1-3 h, and uniformly stirring to obtain the hybrid nano particle solution.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: 1. the waste glass aggregate has high transparency, can be used as a light-transmitting material to enhance the internal light intensity of the pervious concrete, is beneficial to the exertion of the photocatalysis effect of the nano titanium dioxide, and improves the degradation effect of the pervious concrete on pollutants; 2. the introduction of the high-dispersity hybrid nano particle reinforced cementing material component can make up the negative effects on the mechanical and durability properties of the pervious concrete caused by the doping of wastes, the corrosion resistance coefficient reaches 96%, the water permeability coefficient reaches 5.1mm/s, and the 28d compressive strength reaches 35.5 Mpa.
Detailed Description
Example 1
Taking raw materials: 300 parts of cement, 30 parts of fly ash, 800 parts of broken stone, 700 parts of waste glass aggregate, 0.02 part of cellulose ether, 0.1 part of fatty alcohol emulsion, 7 parts of nano titanium dioxide, 20 parts of hybrid nano particle solution and 90 parts of water. The cement is ordinary portland cement, and the strength grade is 52.5; the fly ash is I-grade fly ash; the crushed stone is in single-grade composition, and the particle size is 15 mm; the particle size of the waste glass aggregate is 10 mm; the crystal form of the nano titanium dioxide is anatase, and the particle size is 20 nm.
The preparation method of the hybrid nano particle solution comprises the following steps: adding 15 parts of aminated nano-silica into 85 parts of water, carrying out ultrasonic oscillation for 1h, slowly dripping 10 parts of water reducing agent solution with the mass solubility of 15% within 2h, and uniformly stirring to obtain the hybrid nano-particle solution. The particle size of the amino nano silicon dioxide is 20nm, and the water reducing agent is a polycarboxylic acid water reducing agent.
Preparing the hybrid nano particle reinforced ecological pervious concrete:
(1) mixing and stirring water, nano titanium dioxide and waste glass aggregate for 5min, standing for 10min, and stirring for 5 min;
(2) adding cement, fly ash, broken stone, cellulose ether, fatty alcohol emulsion and the hybrid nano particle solution into the mixture obtained in the step (1), and mixing and stirring for 3 min;
(3) and (3) pouring the product obtained in the step (2) into a mold, curing for 28 days under the conditions that the temperature is 25 ℃ and the humidity is 60%, and then demolding.
Example 2
Taking raw materials: 270 parts of cement, 50 parts of fly ash, 600 parts of broken stone, 700 parts of waste glass aggregate, 0.03 part of cellulose ether, 0.2 part of fatty alcohol emulsion, 6 parts of nano titanium dioxide, 18 parts of hybrid nano particle solution and 85 parts of water. The cement is ordinary portland cement, and the strength grade is 52.5; the fly ash is I-grade fly ash; the crushed stone is in single-grade composition, and the particle size is 15 mm; the particle size of the waste glass aggregate is 10 mm; the crystal form of the nano titanium dioxide is anatase, and the particle size is 30 nm.
The preparation method of the hybrid nano particle solution comprises the following steps: adding 15 parts of aminated nano-silica into 85 parts of water, carrying out ultrasonic oscillation for 1h, slowly dripping 10 parts of water reducing agent solution with the mass solubility of 15% within 1h, and uniformly stirring to obtain the hybrid nano-particle solution. The particle size of the amino nano silicon dioxide is 30nm, and the water reducing agent is a polycarboxylic acid water reducing agent.
Preparing the hybrid nano particle reinforced ecological pervious concrete:
(1) mixing and stirring water, nano titanium dioxide and waste glass aggregate for 3min, standing for 10min, and stirring for 5 min;
(2) adding cement, fly ash, broken stone, cellulose ether, fatty alcohol emulsion and the hybrid nano particle solution into the mixture obtained in the step (1), and mixing and stirring for 5 min;
(3) and (3) pouring the product obtained in the step (2) into a mold, curing for 28 days under the conditions that the temperature is 20 ℃ and the humidity is 50%, and then demolding.
Example 3
Taking raw materials: 300 parts of cement, 30 parts of fly ash, 500 parts of broken stone, 800 parts of waste glass aggregate, 0.03 part of cellulose ether, 0.2 part of fatty alcohol emulsion, 8 parts of nano titanium dioxide, 25 parts of hybrid nano particle solution and 95 parts of water. The cement is ordinary portland cement, and the strength grade is 52.5; the fly ash is II-grade fly ash; the crushed stone is in single-grade composition, and the particle size is 15 mm; the particle size of the waste glass aggregate is 10 mm; the crystal form of the nano titanium dioxide is anatase, and the particle size is 20 nm.
The preparation method of the hybrid nano particle solution comprises the following steps: adding 15 parts of aminated nano-silica into 85 parts of water, carrying out ultrasonic oscillation for 1h, slowly dripping 10 parts of water reducing agent solution with the mass solubility of 15% within 1.5h, and uniformly stirring to obtain a hybrid nano-particle solution; the particle size of the amino nano silicon dioxide is 20nm, and the water reducing agent is a polycarboxylic acid water reducing agent.
Preparing the hybrid nano particle reinforced ecological pervious concrete:
(1) mixing and stirring water, nano titanium dioxide and waste glass aggregate for 5min, standing for 10min, and stirring for 3 min;
(2) adding cement, fly ash, broken stone, cellulose ether, fatty alcohol emulsion and the hybrid nano particle solution into the mixture obtained in the step (1), and mixing and stirring for 5 min;
(3) and (3) pouring the product obtained in the step (2) into a mold, curing for 28 days under the conditions that the temperature is 25 ℃ and the humidity is 50%, and then demolding.
Example 4
Taking raw materials: 200 parts of cement, 15 parts of fly ash, 200 parts of broken stone, 200 parts of waste glass aggregate, 0.06 part of cellulose ether, 0.05 part of fatty alcohol emulsion, 3 parts of nano titanium dioxide, 12 parts of hybrid nano particle solution and 60 parts of water. The cement is ordinary portland cement, and the strength grade is 52.5; the fly ash is II-grade fly ash; the crushed stone is in single-grade composition, and the particle size is 15 mm; the particle size of the waste glass aggregate is 10 mm; the crystal form of the nano titanium dioxide is anatase, and the particle size is 20 nm.
The preparation method of the hybrid nano particle solution comprises the following steps: adding 15 parts of aminated nano-silica into 85 parts of water, carrying out ultrasonic oscillation for 1h, slowly dripping 10 parts of water reducing agent solution with the mass solubility of 15% within 1.5h, and uniformly stirring to obtain a hybrid nano-particle solution; the particle size of the amino nano silicon dioxide is 20nm, and the water reducing agent is a polycarboxylic acid water reducing agent.
Preparing the hybrid nano particle reinforced ecological pervious concrete:
(1) mixing and stirring water, nano titanium dioxide and waste glass aggregate for 5min, standing for 10min, and stirring for 3 min;
(2) adding cement, fly ash, broken stone, cellulose ether, fatty alcohol emulsion and the hybrid nano particle solution into the mixture obtained in the step (1), and mixing and stirring for 5 min;
(3) and (3) pouring the product obtained in the step (2) into a mold, curing for 28 days under the conditions that the temperature is 25 ℃ and the humidity is 50%, and then demolding.
Example 5
Taking raw materials: 350 parts of cement, 60 parts of fly ash, 900 parts of broken stone, 800 parts of waste glass aggregate, 0.03 part of cellulose ether, 0.3 part of fatty alcohol emulsion, 15 parts of nano titanium dioxide, 12 parts of hybrid nano particle solution and 120 parts of water. The cement is ordinary portland cement, and the strength grade is 52.5; the fly ash is II-grade fly ash; the crushed stone is in single-grade composition, and the particle size is 15 mm; the particle size of the waste glass aggregate is 10 mm; the crystal form of the nano titanium dioxide is anatase, and the particle size is 20 nm.
The preparation method of the hybrid nano particle solution comprises the following steps: adding 15 parts of aminated nano-silica into 85 parts of water, carrying out ultrasonic oscillation for 1h, slowly dripping 10 parts of water reducing agent solution with the mass solubility of 15% within 1.5h, and uniformly stirring to obtain a hybrid nano-particle solution; the particle size of the amino nano silicon dioxide is 20nm, and the water reducing agent is a polycarboxylic acid water reducing agent.
Preparing the hybrid nano particle reinforced ecological pervious concrete:
(1) mixing and stirring water, nano titanium dioxide and waste glass aggregate for 5min, standing for 10min, and stirring for 3 min;
(2) adding cement, fly ash, broken stone, cellulose ether, fatty alcohol emulsion and the hybrid nano particle solution into the mixture obtained in the step (1), and mixing and stirring for 5 min;
(3) and (3) pouring the product obtained in the step (2) into a mold, curing for 28 days under the conditions that the temperature is 25 ℃ and the humidity is 50%, and then demolding.
The performance of the concrete samples in examples 1 to 3 is detected, and the results are shown in table 1, wherein the detection method refers to CJJ/T135-2009 technical Specification for pervious cement concrete pavements and GB/T50082 test methods for testing the long-term performance and durability of ordinary concrete.
TABLE 1 test performance of examples 1 to 3
| Item | Example 1 | Example 2 | Example 3 |
| Coefficient of water permeability (mm/s) | 4.2 | 4.5 | 5.1 |
| 7d compressive strength (Mpa) | 25.8 | 24.8 | 24.5 |
| 28d compressive strength (Mpa) | 35.5 | 33.2 | 31.8 |
| Erosion resistance coefficient (%) | 96 | 92 | 95 |
Claims (7)
1. The hybrid nano particle reinforced ecological pervious concrete is characterized by comprising the following components in parts by weight: 200-350 parts of cement, 15-60 parts of fly ash, 200-900 parts of broken stone, 200-800 parts of waste glass aggregate, 0.02-0.06 part of cellulose ether, 0.05-0.3 part of fatty alcohol emulsion, 3-15 parts of nano titanium dioxide, 12-25 parts of hybrid nano particle solution and 60-120 parts of water.
2. The hybrid nanoparticle reinforced ecological pervious concrete according to claim 1, wherein the hybrid nanoparticle solution is prepared from an aminated nanosilica solution and a water-reducing agent solution.
3. The hybrid nanoparticle reinforced ecological pervious concrete according to claim 2, wherein the amino nano silica in the aminated nano silica solution has a particle size of 20-60 nm.
4. The hybrid nanoparticle reinforced ecological pervious concrete according to claim 2, wherein the water reducing agent is a polycarboxylic acid-based water reducing agent.
5. The hybrid nanoparticle reinforced ecological pervious concrete according to claim 1, wherein the cement is ordinary portland cement, the fly ash is class I fly ash or class II fly ash, the crushed stone is single-stage formula, the particle size is 5-15 mm, the particle size of the waste glass aggregate is 5-10 mm, the crystal form of the nano titanium dioxide is anatase, and the particle size is 10-80 nm.
6. The preparation method of the hybrid nanoparticle reinforced ecological pervious concrete of claim 1, characterized by comprising the following steps:
(1) uniformly mixing water, nano titanium dioxide and waste glass aggregate to obtain a mixture;
(2) preparing a hybrid nanoparticle solution;
(3) adding cement, fly ash, broken stone, cellulose ether, fatty alcohol emulsion and a hybrid nano particle solution into the mixture obtained in the step (1) and stirring;
(4) and (3) pouring the product obtained in the step (2) into a mould, curing for 7-28 days, and demoulding to obtain the hybrid nano particle reinforced ecological pervious concrete.
7. The method for preparing the hybrid nanoparticle reinforced ecological pervious concrete according to claim 6, wherein the step of preparing the hybrid nanoparticle solution in the step 2 comprises the following steps:
(21) adding 15-20 parts of aminated nano-silica into 85-90 parts of water, and ultrasonically oscillating for 1-2 hours to obtain an aminated nano-silica solution;
(22) slowly dripping 10-12 parts of water reducing agent solution with the mass solubility of 10% -15% into the aminated nano silicon dioxide solution within 1-3 h, and uniformly stirring to obtain the hybrid nano particle solution.
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