CN105669135A - Preparation method of composite type nano-photocatalytic concrete pavement brick - Google Patents
Preparation method of composite type nano-photocatalytic concrete pavement brick Download PDFInfo
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- CN105669135A CN105669135A CN201610065242.8A CN201610065242A CN105669135A CN 105669135 A CN105669135 A CN 105669135A CN 201610065242 A CN201610065242 A CN 201610065242A CN 105669135 A CN105669135 A CN 105669135A
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/30—Oxides other than silica
- C04B14/305—Titanium oxide, e.g. titanates
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5041—Titanium oxide or titanates
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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
- C04B2111/00008—Obtaining or using nanotechnology related materials
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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
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
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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
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Road Paving Structures (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a preparation method of a composite type nano-photocatalytic concrete pavement brick. The preparation method comprises the following steps: (1) a main body layer material and a face layer material are prepared; (2) the face layer material is poured into a mold, then the main body layer material is poured into the mold, the materials are subjected to extrusion molding, and a face layer after demolding is coagulated naturally upwards for 2-3 h; (3) cement slurry is taken as a binder, titanate precursor sol is sprayed to the face layer material and forms a film on the face layer material, and a concrete pavement brick green body is obtained after aging is performed in a clean environment at the room temperature for 7-10 days; (4) the body is placed into a drying oven, and the composite type nano-photocatalytic concrete pavement brick is obtained. In a photocatalytic degradation experiment of the composite type nano-photocatalytic concrete pavement brick, the pollutant concentration is reduced from 0.998 mg/m<3> to 0.719 mg/m<3>, and the degradation rate within 20 min reaches 27.7%.
Description
Technical field
The present invention relates to a kind of nano-photo catalytic construction material, the preparation method being specifically related to composite nano photocatalysis concrete road pavement brick.
Background technology
China's wide geographic area frequency was polluted by haze weather in recent years, serious harm people ' s health. Comprehensive control to haze weather, mainly strictly controls the polluter such as motor-vehicle tail-gas, industrial discharge, raw coal combustion and airborne dust from technological layer, but present stage does not also reach zero-emission. To the pollutant being directly discharged in air, such as nitrogen oxides (NOX), sulfur dioxide (SO2), volatile organic matter (VOC) and fine particle (PM2.5) etc., there is no effective technology governance measure on a large scale at present. Research finds that nano semiconductor material has a kind of photocatalysis characteristic, can produce strong redox ability, react with various organic pollutions under the irradiation of ultraviolet. This technology has started to be applied to the air purification field of indoor at present, and the purifying problem for outdoor air is still in the exploratory development stage. With cement, gather materials (stone, sand) and water is for primary raw material, the explained hereafter such as agitated, molding and maintenance, the concrete road pavement brick of non-configuration reinforcement, mainly divides band surface layer and the big class of entire body two, is currently widely used in domestic and international Process of Urbanization Construction by structure.
Summary of the invention
The present invention is directed to the deficiency of existing improvement outdoor air pollution technology, it is provided that a kind of simple in construction, practical, can the composite nano photocatalysis concrete road pavement brick of effective clean room's outer air, pollute one new technological approaches of exploration for comprehensive control haze.
The technical scheme is that with titanate for titanium dioxide (TiO2) presoma of photocatalyst, it is respectively adopted physical pulverization method and two kinds of preparation technologies of chemical sol-gel process, by the facing sections of concrete road pavement brick as carrier, use different carrying methods in the inside of surface layer with surface respectively: admixture method and spraying process, form compound TiO2Nanoscale (1-100nm) elementary cell: i.e. zero dimension (microgranule) and two dimension (thin film), makes and has the NO automatically degraded in airX、SO2With the concrete road pavement brick of VOC, be used for mat formation urban road footpath, square or other ground.
A kind of preparation method of composite nano photocatalysis concrete road pavement brick, its step is as follows:
(1) main body layered material dough-making powder layered material is prepared, described main body layered material is made up of water, 42.5 Portland cements, medium sand and rubble, the mass ratio of its water, cement, medium sand and rubble is 0.5:1:1.8:3.6, by water, 42.5 Portland cements, medium sand and rubble mixing and stirring; The preparation method of described capstock is as follows: add T in wateriO2Nanoparticle, stirring generates colloid, then by colloid, 42.5 Portland cements and medium sand mixing and stirring ageing 10 minutes, described water and TiO2The mass ratio of nanoparticle is 0.05-0.2:1, and the mass ratio of described colloid, cement and medium sand is 0.5:1:2.6;
(2) capstock first being poured mould into, then pour main body layered material into, then extruded, demoulding back layer condenses 2-3h upward naturally;
(3) making binding agent with cement mortar, spray titanate precursor sol on capstock, titanate precursor sol forms thin film on capstock, and in the environment under cleaning, room temperature, ageing 7-10 days, obtains concrete road pavement brick idiosome;
(4) concrete road pavement brick idiosome is put in drying oven, drying oven is warming up to 80-120 DEG C, natural cooling is taken out after insulation 30min, insert again in roaster, roasting is carried out to 400-450 DEG C with 2-3 DEG C/min ramp, calcination atmosphere is argon or air, takes out natural cooling, obtain composite nano photocatalysis concrete road pavement brick after insulation 1h.
In described step (1), the particle diameter of medium sand is 0.25-0.5mm, and the particle diameter of rubble is below 15mm.
In described step (2), the length × width x thickness=250mm × 250mm × 60mm of mould, the thickness of main body layered material and capstock is than for 8-9:1.
In described step (3), the preparation process of titanate precursor sol is as follows: make presoma with butyl titanate, ethanol and water as solvent, acetylacetone,2,4-pentanedione and hydrochloric acid make inhibitor, the ratio of butyl titanate, ethanol, acetylacetone,2,4-pentanedione, hydrochloric acid and the amount of substance of water is 1:16:2:0.4:3, butyl titanate is dissolved in ethanol, is subsequently adding acetylacetone,2,4-pentanedione, hydrochloric acid and water, after stirring, obtain titanate precursor sol.
In described step (3), the thickness of thin film is 50-100nm.
The thickness of described composite nano photocatalysis concrete road pavement brick is 50-60mm.
The invention has the beneficial effects as follows: in the present invention, composite nano photocatalysis concrete road pavement brick has catalytic purification pollutants in air and the comprehensive function beautifying road surface of hardening. Two kinds of elementary cells that its Compound Negative on a carrier carries nanometer, distribution density is big, and total surface area is big, and the speed of catalytic reaction and efficiency are just high. In photocatalytic degradation is tested, pollutant levels are by 0.998mg/m3It is down to 0.719mg/m3, in 20 minutes, degradation rate reaches 27.7%. During to 100 minutes, photodissociation rate reaches 44.7%. Reaction produces avirulent oxidation product, makes absolute toxicity reduce. TiO2Chemical stability is high, nontoxic, cost is low. When with the passing of time concrete road pavement brick weares and teares, the photocatalyst of nexine displays, and remains to substantially keep original function. Nano thin-film has super hydrophilic characteristic, and therefore the present invention also has certain self-cleaning function, when urban sanitation car is sprinkled water or rains whenever, it is easy to remove concrete road pavement brick surface dustiness. Present configuration is simple, practical, except can be widely applied to urban road and surface construction, it is possible to the bank protection being applied to both sides of highway is built, and plays the effect of purifying motor tail gas equally.
Detailed description of the invention
Embodiment 1
A kind of preparation method of composite nano photocatalysis concrete road pavement brick, its step is as follows:
(1) main body layered material dough-making powder layered material is prepared, described main body layered material is made up of water, 42.5 Portland cements, medium sand and rubble, the particle diameter of medium sand is 0.25mm, the particle diameter of rubble is below 15mm, the mass ratio of its water, cement, medium sand and rubble is 0.5:1:1.8:3.6, by water, 42.5 Portland cements, medium sand and rubble mixing and stirring;The preparation method of described capstock is as follows: add T in wateriO2Nanoparticle, stirring generates colloid, then by colloid, 42.5 Portland cements and medium sand mixing and stirring ageing 10 minutes, described water and TiO2The mass ratio of nanoparticle is 0.05-0.2:1, and the mass ratio of described colloid, cement and medium sand is 0.5:1:2.6;
(2) capstock first being poured mould into, then pour main body layered material into, then extruded, demoulding back layer condenses 2-3h upward naturally, the length × width x thickness=250mm × 250mm × 60mm of mould, and the thickness of main body layered material and capstock is than for 8:1;
(3) binding agent is made with cement mortar, capstock sprays titanate precursor sol, titanate precursor sol forms thin film on capstock, the thickness of thin film is 50-100nm, in cleaning, ageing 7-10 days in environment under room temperature, obtain concrete road pavement brick idiosome, the preparation process of titanate precursor sol is as follows: make presoma with butyl titanate, ethanol and water as solvent, acetylacetone,2,4-pentanedione and hydrochloric acid make inhibitor, butyl titanate, ethanol, acetylacetone,2,4-pentanedione, the ratio of hydrochloric acid and the amount of substance of water is 1:16:2:0.4:3, butyl titanate is dissolved in ethanol, it is subsequently adding acetylacetone,2,4-pentanedione, hydrochloric acid and water, titanate precursor sol is obtained after stirring,
(4) concrete road pavement brick idiosome is put in drying oven, drying oven is warming up to 80-120 DEG C, natural cooling is taken out after insulation 30min, insert again in roaster, carrying out roasting with 2-3 DEG C/min ramp to 400-450 DEG C, calcination atmosphere is argon or air, takes out natural cooling after insulation 1h, obtaining composite nano photocatalysis concrete road pavement brick, thickness is 50mm.
Embodiment 2
A kind of preparation method of composite nano photocatalysis concrete road pavement brick, its step is as follows:
(1) main body layered material dough-making powder layered material is prepared, described main body layered material is made up of water, 42.5 Portland cements, medium sand and rubble, the particle diameter of medium sand is 0.5mm, the particle diameter of rubble is below 15mm, the mass ratio of its water, cement, medium sand and rubble is 0.5:1:1.8:3.6, by water, 42.5 Portland cements, medium sand and rubble mixing and stirring; The preparation method of described capstock is as follows: add T in wateriO2Nanoparticle, stirring generates colloid, then by colloid, 42.5 Portland cements and medium sand mixing and stirring ageing 10 minutes, described water and TiO2The mass ratio of nanoparticle is 0.05-0.2:1, and the mass ratio of described colloid, cement and medium sand is 0.5:1:2.6;
(2) capstock first being poured mould into, then pour main body layered material into, then extruded, demoulding back layer condenses 2-3h upward naturally, the length × width x thickness=250mm × 250mm × 60mm of mould, and the thickness of main body layered material and capstock is than for 9:1;
(3) binding agent is made with cement mortar, capstock sprays titanate precursor sol, titanate precursor sol forms thin film on capstock, the thickness of thin film is 50-100nm, in cleaning, ageing 7-10 days in environment under room temperature, obtain concrete road pavement brick idiosome, the preparation process of titanate precursor sol is as follows: make presoma with butyl titanate, ethanol and water as solvent, acetylacetone,2,4-pentanedione and hydrochloric acid make inhibitor, butyl titanate, ethanol, acetylacetone,2,4-pentanedione, the ratio of hydrochloric acid and the amount of substance of water is 1:16:2:0.4:3, butyl titanate is dissolved in ethanol, it is subsequently adding acetylacetone,2,4-pentanedione, hydrochloric acid and water, titanate precursor sol is obtained after stirring,
(4) concrete road pavement brick idiosome is put in drying oven, drying oven is warming up to 80-120 DEG C, natural cooling is taken out after insulation 30min, insert again in roaster, carrying out roasting with 2-3 DEG C/min ramp to 400-450 DEG C, calcination atmosphere is argon or air, takes out natural cooling after insulation 1h, obtaining composite nano photocatalysis concrete road pavement brick, thickness is 60mm.
Claims (6)
1. the preparation method of a composite nano photocatalysis concrete road pavement brick, it is characterised in that its step is as follows:
(1) main body layered material dough-making powder layered material is prepared, described main body layered material is made up of water, 42.5 Portland cements, medium sand and rubble, the mass ratio of its water, cement, medium sand and rubble is 0.5:1:1.8:3.6, by water, 42.5 Portland cements, medium sand and rubble mixing and stirring; The preparation method of described capstock is as follows: add T in wateriO2Nanoparticle, stirring generates colloid, then by colloid, 42.5 Portland cements and medium sand mixing and stirring ageing 10 minutes, described water and TiO2The mass ratio of nanoparticle is 0.05-0.2:1, and the mass ratio of described colloid, cement and medium sand is 0.5:1:2.6;
(2) capstock first being poured mould into, then pour main body layered material into, then extruded, demoulding back layer condenses 2-3h upward naturally;
(3) making binding agent with cement mortar, spray titanate precursor sol on capstock, titanate precursor sol forms thin film on capstock, and in the environment under cleaning, room temperature, ageing 7-10 days, obtains concrete road pavement brick idiosome;
(4) concrete road pavement brick idiosome is put in drying oven, drying oven is warming up to 80-120 DEG C, natural cooling is taken out after insulation 30min, insert again in roaster, roasting is carried out to 400-450 DEG C with 2-3 DEG C/min ramp, calcination atmosphere is argon or air, takes out natural cooling, obtain composite nano photocatalysis concrete road pavement brick after insulation 1h.
2. the preparation method of composite nano photocatalysis concrete road pavement brick according to claim 1, it is characterised in that: in described step (1), the particle diameter of medium sand is 0.25-0.5mm, and the particle diameter of rubble is below 15mm.
3. the preparation method of composite nano photocatalysis concrete road pavement brick according to claim 1, it is characterised in that: in described step (2), the length × width x thickness=250mm × 250mm × 60mm of mould, the thickness of main body layered material and capstock is than for 8-9:1.
4. the preparation method of composite nano photocatalysis concrete road pavement brick according to claim 1, it is characterized in that: in described step (3), the preparation process of titanate precursor sol is as follows: make presoma with butyl titanate, ethanol and water as solvent, acetylacetone,2,4-pentanedione and hydrochloric acid make inhibitor, the ratio of butyl titanate, ethanol, acetylacetone,2,4-pentanedione, hydrochloric acid and the amount of substance of water is 1:16:2:0.4:3, butyl titanate is dissolved in ethanol, it is subsequently adding acetylacetone,2,4-pentanedione, hydrochloric acid and water, after stirring, obtains titanate precursor sol.
5. the preparation method of composite nano photocatalysis concrete road pavement brick according to claim 1, it is characterised in that: in described step (3), the thickness of thin film is 50-100nm.
6. the preparation method of composite nano photocatalysis concrete road pavement brick according to claim 1, it is characterised in that: the thickness of described composite nano photocatalysis concrete road pavement brick is 50-60mm.
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Cited By (4)
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| CN107381711A (en) * | 2017-07-17 | 2017-11-24 | 河海大学 | Reactor and its operation process are repaired in a kind of dyeing waste water photocatalysis |
| CN108947365A (en) * | 2018-09-20 | 2018-12-07 | 河南工程学院 | A kind of nano glass fiber reinforced concrete material and preparation method thereof |
| CN109208425A (en) * | 2017-06-30 | 2019-01-15 | 禹智环保科技（深圳）有限公司 | Sponge road surface and preparation method thereof |
| US20210387918A1 (en) * | 2018-10-22 | 2021-12-16 | Ldv Green Tech S.R.L. | Improved, functional, photocatalytic building materials and processes for preparing them |
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| US20210387918A1 (en) * | 2018-10-22 | 2021-12-16 | Ldv Green Tech S.R.L. | Improved, functional, photocatalytic building materials and processes for preparing them |
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