CN101205697B - Concrete paving brick capable of purifying air and method for manufacturing the same - Google Patents

Concrete paving brick capable of purifying air and method for manufacturing the same Download PDF

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Publication number
CN101205697B
CN101205697B CN2006101690620A CN200610169062A CN101205697B CN 101205697 B CN101205697 B CN 101205697B CN 2006101690620 A CN2006101690620 A CN 2006101690620A CN 200610169062 A CN200610169062 A CN 200610169062A CN 101205697 B CN101205697 B CN 101205697B
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CN
China
Prior art keywords
aggregate
cement
paving block
amount
cullet
Prior art date
Application number
CN2006101690620A
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Chinese (zh)
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CN101205697A (en
Inventor
潘智生
寇世聪
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香港理工大学
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Priority to CN2006101690620A priority Critical patent/CN101205697B/en
Publication of CN101205697A publication Critical patent/CN101205697A/en
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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0004Compounds chosen for the nature of their cations
    • C04B2103/0017Refractory metal compounds
    • C04B2103/0019Ti
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017Aspects relating to the protection of the environment
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00612Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention provides a concrete paving brick capable of clarifying air produced by using building waste and recycled glass and the manufacturing method thereof. The paving brick comprises an absorption layer and a foundation layer, the absorption layer comprises cement, aggregate, titanium oxide and coal ash or kaolinite powder, the aggregate of the absorption layer comprises recycled aggregate, waste glass aggregate and sand or stones; the foundation layer comprises cement, aggregate and coal ash or kaolinite powder, the aggregate of the foundation layer comprises recycled aggregate, waste glass aggregate and sand or stones. The paving brick of the invention has good function of absorbing exhaust gas and good strength.

Description

Concrete paving block capable of purifying air and manufacture method thereof
Technical field
The invention belongs to building material field coagulation great soil group, relate to a kind of concrete paving block capable of purifying air that utilizes waste material of buildings and recovery glass to make, and the manufacture method of this paving block.
Background technology
In Hong Kong, all will produce a large amount of building debriss and cullet bottle every day, handles these building debriss and the cullet bottle has become serious society and environmental problem.Along with the rapid growth of economy and the raising of people's living standard, in the big and medium-sized cities at home, the management of waste material of buildings and cullet bottle and processing are becoming main environmental problem equally, and seriously influence the strategy of sustainable development of country.Therefore, exploitation is reclaimed and is utilized the new technology of waste material of buildings and cullet to become more and more important.
Waste material of buildings generally is made up of broken concrete, brick and ceramic tile, sand, dust, wood, plastics and scrap iron etc.Broken concrete generally is the maximum ingredient of waste material of buildings, and the broken concrete of process crushing and screening can be used for replacing the natural aggregate in the concrete or is used as the road basis, and this class salvage material is called regeneration aggregate.Regeneration aggregate successfully utilizes at the construction industry middle part of American-European developed country, is mainly used on the basis of non-structural concrete and road.The application of regeneration aggregate in structural concrete is limited in 20%, mainly is that specific strength is lower mutually with natural stone because of regeneration aggregate, porous and higher water absorption rate, thus cause the difficult control of concrete flowability.The concrete paving block piece of mechanical pressing belongs to no slump concrete, less demanding to flowability, therefore, utilize the method manufacturing concrete paving block and the partition block of mechanical pressing to replace natural gravel with 100% regeneration aggregate, the cullet bottle that reclaims also can be used as the aggregate (being the cullet aggregate) of making paving block through broken with screening simultaneously.
The poisonous tail gas of motor vehicle emission is one of metropolitan main air pollution source, if paving block has the function that purifies air the effect of killing two birds with one stone will be arranged.Studies show that much titanium dioxide has poison gas (NO in the vehicle exhaust of absorption under light-catalysed effect x→ NO 3, CO → CO 2) function.Therefore, paving block is manufactured the absorbed layer that can absorb air and basal layer that can load-bearing, in absorbed layer, add titanium dioxide, play the effect that purifies air thereby paving block just has the function that absorbs vehicle exhaust.
Summary of the invention
The object of the present invention is to provide a kind of concrete paving block capable of purifying air and manufacture method thereof of utilizing waste material of buildings and recovery glass to make.Owing to used waste material of buildings and cullet; new way is provided on the one hand the utilization of waste material of buildings; saved the exploitation of natural gravel on the other hand; the 3rd has protected environment; the purifying city air of curbing environmental pollution; therefore, concrete paving block capable of purifying air of the present invention and manufacture method thereof the new technology that is sustainable development.
For achieving the above object, concrete paving block provided by the invention comprises absorbed layer and basal layer.Described absorbed layer is positioned at the upper strata of paving block, wherein contains titanium dioxide (TiO 2), to absorb airborne pernicious gas.Described base-layer bits plays the effect of load-bearing in the lower floor of paving block.
The absorbed layer of paving block of the present invention comprises: cement, aggregate, titanium dioxide and flyash or high mountain range powder; Aggregate wherein comprises: regeneration aggregate, cullet aggregate and sand or stone.
The basal layer of paving block of the present invention comprises: cement, aggregate and flyash or high mountain range powder; Aggregate wherein comprises: regeneration aggregate, cullet aggregate and sand or stone.
Each composition proportion of paving block of the present invention can be with reference to the conventional scheme of this area.
Preferably, in the described absorbed layer of paving block of the present invention, the weight ratio of cement and aggregate is 1: 4~1: 2, titanium dioxide is 1~10wt% of cement amount, flyash is 5~50wt% of cement amount, high mountain range powder is 1~20wt% of cement amount, and regeneration aggregate is 0~100wt% of aggregate total amount, and the cullet aggregate is 0~50wt% of aggregate total amount; In the described basal layer, the weight ratio of cement and aggregate is 1: 5~1: 2, and flyash is 0~50wt% of cement amount, and high mountain range powder is 0~20wt% of cement amount, regeneration aggregate is 0~100wt% of aggregate total amount, and the cullet aggregate is 0~50wt% of aggregate total amount.
Above-mentioned titanium dioxide is preferably the 2-8wt% of cement amount, more preferably the 6wt% of cement amount.
More preferably, in the described absorbed layer of paving block of the present invention, the weight ratio of cement and aggregate is 1: 3, titanium dioxide is the 6wt% of cement amount, flyash is the 20wt% of cement amount, high mountain range powder is the 10wt% of cement amount, and regeneration aggregate is the 50wt% of aggregate total amount, and the cullet aggregate is the 25wt% of aggregate total amount; And in the described basal layer, the weight ratio of cement and aggregate is 1: 4~1: 3, and flyash is the 20wt% of cement amount, and high mountain range powder is the 10wt% of cement amount, and regeneration aggregate is the 50wt% of aggregate total amount, and the cullet aggregate is the 20wt% of aggregate total amount.
Paving block of the present invention comprises absorbed layer and basal layer, and two-layer thickness can be determined by the technology general knowledge of this area, also can adjust according to the factors such as practical use of made paving block.The absorber thickness of preferred paving block of the present invention is 3~8 millimeters, more preferably 5 millimeters.The thickness of basal layer is 40~80 millimeters.
The employed cement of paving block of the present invention is any cement that adopts usually in the concrete technology.Further, described cement can be selected from portland cement, Portland cement, limestone portland cement, white cement or slag cements.
The employed flyash of paving block of the present invention is that particle diameter is less than or equal to 45 microns and the phosphorus content flyash less than 7% percentage by weight.
The paving block according to the present invention, the particle size range of the regeneration aggregate of its absorbed layer is<5 millimeters, is preferably<2.36 millimeters.The particle size range of the regeneration aggregate of basal layer is<10 millimeters.
The paving block according to the present invention, the particle size range of the cullet aggregate of its absorbed layer is<5 millimeters, is preferably<2.36 millimeters.The particle size range of the cullet aggregate of basal layer is<10 millimeters.
Employed stone, sand and water and manufacturing portland cement concrete is identical in the paving block of the present invention, need not specify.
The present invention also provides the manufacture method of above-mentioned concrete paving block, and it comprises:
Cement, flyash or high mountain range powder, aggregate, titanium dioxide and water cooperated according to a certain percentage make the absorbed layer mixture and stir; Again cement, flyash or high mountain range powder, aggregate and water are cooperated according to a certain percentage and make the basal layer mixture, stir; Divide two-layer compacting (basal layer and absorbed layer) (as Fig. 1) with the method for mechanical pressing, can produce the concrete paving block that the technology of the present invention provides.
The consumption of employed water can be according to the technology general knowledge of this area or definite according to actual needs in the manufacture method of paving block of the present invention, and preferably, the consumption of water is respectively 10~15% of material gross weight in absorbed layer or the basal layer.More preferably, the consumption of water is 13% of a material gross weight during preparation absorbed layer, and the consumption of water is 12% of a material gross weight during preparation basal layer.
Description of drawings
Fig. 1 is concrete paving block capable of purifying air structure of the present invention and operating principle schematic diagram.
The specific embodiment
Below, in conjunction with specific embodiments, the present invention is described in further detail.
Embodiment 1:
Press table 1 proportioning and produce concrete paving block.Compressive strength and NO xThe assay method of attenuating rate be well known in the art.
From the listed proportioning of table 1 and the concrete paving block characteristic of being produced as can be seen, because the increase of cullet aggregate consumption, the intensity of paving block descends to some extent, but the intensity of all concrete paving blocks still reaches more than the 49MPa.Reached the requirement of Hong Kong norm of construction and British Standard fully.Under the volume of identical titanium dioxide, when the cullet aggregate mixed, brick was to NO xThe attenuating rate increase, this mainly is because glass increases the probability that the refraction of light makes titanium dioxide participate in reaction.
The proportioning of table 1, concrete paving block and performance measurement result
Annotate: in the table 1, flyash (%): refer to that flyash is the wt% of cement amount, the implication of high mountain range powder (%) similarly in the following table; Regeneration aggregate (%): refer to that this aggregate is the wt% of aggregate total amount; Cullet aggregate (%): refer to that this aggregate is the wt% of aggregate total amount.Regeneration aggregate in the following table (%) is identical therewith with the implication of cullet aggregate (%).
Embodiment 2
Press table 2 proportioning and produce concrete paving block.And mensuration compressive strength and NO xThe attenuating rate.
From the characteristic of the concrete paving block of the listed proportioning of table 2 and manufacturing as can be seen, because the compressive strength of the increase brick of cement consumption increases, compare with example 1, the content of titanium dioxide increases, NO xThe attenuating rate increase, but when titanium dioxide surpassed 6%, the increase of absorptivity was also not obvious.
The proportioning of table 2, concrete paving block and performance measurement result
Embodiment 3
Press table 3 proportioning and produce concrete paving block.And mensuration compressive strength and NO xThe attenuating rate.
As seen, the paving block by proportioning manufacturing in the table can obtain good compressive strength and NO xThe attenuating rate.
The proportioning of table 3, concrete paving block and performance measurement result
Embodiment 4
Press table 4 proportioning and produce concrete paving block.And mensuration compressive strength and NO xThe attenuating rate.
As seen, the paving block by proportioning manufacturing in the table can obtain good compressive strength and NO xThe attenuating rate.
The proportioning of table 4, concrete paving block and performance measurement result
Embodiment 5
In absorbed layer, the weight ratio of cement and aggregate is 1: 3, titanium dioxide is the 6wt% of cement amount, flyash is the 20wt% (example 5) of cement amount, or high mountain range powder is the 10wt% (example 6) of cement amount, regeneration aggregate (<2.36mm or<5mm) be the 50wt% of aggregate total amount, the cullet aggregate (<2.36mm or<5mm) be the 25wt% of aggregate total amount; In basal layer, the weight ratio of cement and aggregate is 1: 4~1: 3 (being respectively 1: 3,1: 3.5,1: 4), flyash is the 20wt% of cement amount, or high mountain range powder is the 10wt% of cement amount, regeneration aggregate (<10mm) be the 50wt% of aggregate total amount, the cullet aggregate (<10mm) be the 20wt% of aggregate total amount.When compressive strength and NO specifically prepare burden xAttenuating rate measurement result such as table 5 and table 6.
From the result as seen, the paving block by proportioning manufacturing in the table can obtain good compressive strength and NO xThe attenuating rate.
The proportioning of table 5, concrete paving block and performance measurement result
The proportioning of table 6, concrete paving block and performance measurement result
In addition, the paving block of the match ratio manufacturing that embodiment 1 to 5 is listed carries out the alkali-aggregate reaction experiment according to Unite States Standard (ASTM C1260-01), 14 days the expansion rate of paving block of mixing flyash or high mountain range powder is all less than 0.02%, much smaller than the requirement of standard 0.1%.

Claims (16)

1. concrete paving block capable of purifying air, it comprises:
(a) absorbed layer comprises:
(i) cement,
(ii) aggregate, it comprises: regeneration aggregate, cullet aggregate and sand or stone,
(iii) titanium dioxide and
(iv) flyash or high mountain range powder; And
(b) basal layer comprises:
(i) cement,
(ii) aggregate, it comprises: regeneration aggregate, cullet aggregate and sand or stone and
(iii) flyash or high mountain range powder;
In the described absorbed layer, the weight ratio of cement and aggregate is 1: 4~1: 2, titanium dioxide is 1~10wt% of cement amount, flyash is that the 5~50wt% or the high mountain range powder of cement amount is 1~20wt% of cement amount, regeneration aggregate is 0~100wt% of aggregate total amount, and the cullet aggregate is 0~50wt% of aggregate total amount; In the described basal layer, the weight ratio of cement and aggregate is 1: 5~1: 2, flyash is that the 0~50wt% or the high mountain range powder of cement amount is 0~20wt% of cement amount, regeneration aggregate is 0~100wt% of aggregate total amount, the cullet aggregate is 0~50wt% of aggregate total amount, and regeneration aggregate and cullet aggregate are not 0 simultaneously.
2. paving block according to claim 1, described titanium dioxide are the 2-10wt% of cement amount.
3. paving block according to claim 2, described titanium dioxide are the 6wt% of cement amount.
4. paving block according to claim 3, in the described absorbed layer, the weight ratio of cement and aggregate is 1: 3, titanium dioxide is the 6wt% of cement amount, flyash is that the 20wt% or the high mountain range powder of cement amount is the 10wt% of cement amount, regeneration aggregate is the 50wt% of aggregate total amount, and the cullet aggregate is the 25wt% of aggregate total amount; In the described basal layer, the weight ratio of cement and aggregate is 1: 4~1: 3, and flyash is that the 20wt% or the high mountain range powder of cement amount is the 10wt% of cement amount, and regeneration aggregate is the 50wt% of aggregate total amount, and the cullet aggregate is the 20wt% of aggregate total amount.
5. according to any described paving block of claim 1~4, the particle size range of the regeneration aggregate of its absorbed layer is<5 millimeters, and the particle size range of the regeneration aggregate of its basal layer is<10 millimeters.
6. paving block according to claim 5, the particle size range of the regeneration aggregate of its absorbed layer are<2.36 millimeters.
7. according to any described paving block of claim 1~4, the particle size range of the cullet aggregate of its absorbed layer is<5 millimeters, and the particle size range of the cullet aggregate of its basal layer is<10 millimeters.
8. paving block according to claim 7, the particle size range of the cullet aggregate of its absorbed layer is<2.36 millimeters.
9. according to any described paving block of claim 1~4, described flyash is that particle diameter is less than or equal to 45 microns and the phosphorus content flyash less than 7% percentage by weight.
10. according to any described paving block of claim 1~4, described absorber thickness is 3~8 millimeters, and base layer thickness will is 40~80 millimeters.
11. according to any described paving block of claim 1~4, described cement is selected from portland cement, white cement or slag cements.
12. according to any described paving block of claim 1~4, described cement is selected from Portland cement.
13. according to any described paving block of claim 1~4, described cement is selected from limestone portland cement.
14. the manufacture method of any described paving block of claim 1~13, it comprises:
A) with cement, flyash or high mountain range powder, aggregate, titanium dioxide and water cooperate according to a certain percentage makes the absorbed layer mixture, stirs;
B) again with cement, flyash or high mountain range powder, aggregate and water cooperate according to a certain percentage makes the basal layer mixture, stirs;
C) divide two-layer compacting with the method for mechanical pressing, thereby produce any described paving block of claim 1~13.
15. manufacture method according to claim 14, the consumption of wherein preparing the water of described absorbed layer or basal layer is respectively 10~15% of material gross weight.
16. manufacture method according to claim 15, wherein, the consumption of the water of preparation absorbed layer is 13% of a material gross weight, and the consumption of the water of preparation basal layer is 12% of a material gross weight.
CN2006101690620A 2006-12-20 2006-12-20 Concrete paving brick capable of purifying air and method for manufacturing the same CN101205697B (en)

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CN101205697B true CN101205697B (en) 2011-04-13

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CN103086655A (en) * 2011-11-04 2013-05-08 香港理工大学 Method for preparing concrete brick
CN104231855A (en) * 2014-09-09 2014-12-24 长安大学 Haze-reducing coating of bituminous pavement

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CN102531497A (en) * 2012-01-04 2012-07-04 河海大学 Autoclaved aerated concrete (AAC) of nitrogen-doped titanium dioxide and preparation method thereof
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Publication number Priority date Publication date Assignee Title
CN103086655A (en) * 2011-11-04 2013-05-08 香港理工大学 Method for preparing concrete brick
CN103086655B (en) * 2011-11-04 2015-12-02 香港理工大学 A kind of concrete brick and preparation method thereof
CN104231855A (en) * 2014-09-09 2014-12-24 长安大学 Haze-reducing coating of bituminous pavement

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