CN113651562A - Paving brick and preparation method thereof - Google Patents
Paving brick and preparation method thereof Download PDFInfo
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- CN113651562A CN113651562A CN202110911264.2A CN202110911264A CN113651562A CN 113651562 A CN113651562 A CN 113651562A CN 202110911264 A CN202110911264 A CN 202110911264A CN 113651562 A CN113651562 A CN 113651562A
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- waste soil
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- 239000011465 paving brick Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000002699 waste material Substances 0.000 claims abstract description 64
- 239000002689 soil Substances 0.000 claims abstract description 62
- 239000000203 mixture Substances 0.000 claims abstract description 58
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 36
- 239000011707 mineral Substances 0.000 claims abstract description 36
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 34
- 239000012190 activator Substances 0.000 claims abstract description 32
- 239000003513 alkali Substances 0.000 claims abstract description 31
- 238000003756 stirring Methods 0.000 claims abstract description 23
- 238000012423 maintenance Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 17
- 235000019353 potassium silicate Nutrition 0.000 claims description 15
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 15
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 14
- 229910021487 silica fume Inorganic materials 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 7
- 239000000920 calcium hydroxide Substances 0.000 claims description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- 239000003365 glass fiber Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 229920002748 Basalt fiber Polymers 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 230000006835 compression Effects 0.000 abstract description 9
- 238000007906 compression Methods 0.000 abstract description 9
- 239000004566 building material Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 11
- 238000010276 construction Methods 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/02—Conditioning the material prior to shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/022—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form combined with vibrating or jolting
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/1535—Mixtures thereof with other inorganic cementitious materials or other activators with alkali metal containing activators, e.g. sodium hydroxide or waterglass
-
- 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
-
- 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
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a paving brick and a preparation method thereof, relating to the technical field of building materials, wherein the paving brick comprises the following components: 50-65 parts of engineering waste soil, 8-16 parts of alkali activator, 12-25 parts of mineral admixture, 1-2 parts of water reducing agent and 10-20 parts of water; the preparation method comprises the following steps: mixing an alkali activator and a mineral admixture, and stirring to a gel state to obtain a gel mixture; adding engineering waste soil, a water reducing agent and water into the gelled mixture, and stirring to a semi-dry state to obtain a mixture; and pouring the mixture into a mold, performing pressure vibration for 5-10 seconds, and performing maintenance and demolding to obtain the paving brick. The invention solves the problems of high treatment cost and ineffective reutilization of the engineering waste soil in the prior art, realizes the effects of higher compression strength and rupture strength and better quality of the paving brick manufactured by using the engineering waste soil as a main component, and also has the advantages of simple preparation method and low cost.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a paving brick and a preparation method thereof.
Background
At present, along with the development of economy and society, the urbanization level is continuously improved, various large-scale projects such as high-rise building construction, underground traffic construction and underground pipe gallery construction are continuously developed, and accordingly, a large amount of project spoil which is difficult to treat is generated. How to treat the engineering waste soil is a great problem in the construction industry at present, and how to reduce the treatment cost and even recycle the engineering waste soil is a technical problem to be solved at present.
Disclosure of Invention
The main purposes of the invention are as follows: provides a paving brick and a preparation method thereof, aiming at solving the technical problems of high treatment cost and ineffective reutilization of engineering waste soil in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a paving tile comprising:
50-65 parts by weight of engineering waste soil;
8-16 parts by weight of an alkali activator;
12-25 parts by weight of a mineral admixture;
1-2 parts by weight of a water reducing agent;
10 to 20 parts by weight of water.
Further, the paving brick comprises:
50 parts by weight of engineering waste soil, 15 parts by weight of alkali activator, 24 parts by weight of mineral admixture, 1 part by weight of water reducing agent and 10 parts by weight of water.
Optionally, in the paving brick, the alkali activator comprises at least one of water glass, sodium hydroxide, calcium hydroxide and sodium carbonate.
Optionally, in the paving brick, the mineral admixture is a mineral admixture with pozzolanic activity, and the mineral admixture includes at least one of fly ash, silica fume, mineral powder and metakaolin.
Optionally, in the paving brick, the water reducing agent comprises a polycarboxylic acid high efficiency water reducing agent with a water reducing rate of 25% or more.
In a second aspect, the present invention provides a method for preparing a paving brick as described above, comprising the steps of:
mixing an alkali activator and a mineral admixture, and stirring to a gel state to obtain a gel mixture;
adding engineering waste soil, a water reducing agent and water into the gelled mixture, and stirring to a semi-dry state to obtain a mixture;
and pouring the mixture into a mold, performing pressure vibration for 5-10 seconds, and performing maintenance and demolding to obtain the paving brick.
In a third aspect, the present invention provides a paving tile comprising:
50-65 parts by weight of engineering waste soil;
8-16 parts by weight of an alkali activator;
12-25 parts by weight of a mineral admixture;
1-2 parts by weight of a water reducing agent;
9-19 parts by weight of water;
1 to 2 parts by weight of a fiber.
Further, the paving brick comprises:
50 parts by weight of engineering waste soil, 15 parts by weight of alkali activator, 24 parts by weight of mineral admixture, 1 part by weight of water reducing agent, 9 parts by weight of water and 1 part by weight of fiber.
Optionally, in the paving tile, the fiber comprises at least one of PP fiber, PVA fiber, basalt fiber, glass fiber and glass fiber mesh cloth.
In a fourth aspect, the present invention provides a method for preparing a paving brick as described above, comprising the steps of:
mixing an alkali activator and a mineral admixture, and stirring to a gel state to obtain a first mixture;
adding fibers into the first mixture, and stirring until the fibers are dispersed to obtain a second mixture;
adding engineering waste soil, a water reducing agent and water into the second mixture, and stirring to a semi-dry state to obtain a new mixture;
and pouring the new mixture into a mold, performing pressure vibration for 5-10 seconds, and performing maintenance and demolding to obtain the paving brick.
One or more technical solutions provided by the present invention may have the following advantages or at least achieve the following technical effects:
according to the paving brick and the preparation method thereof, the engineering waste soil is used as a main component to manufacture the paving brick, the engineering waste soil is effectively treated, the manufactured paving brick can be used for urban construction, and the recycling and utilization of the engineering waste soil can be realized without consuming excessive manpower, material resources and other costs; according to the invention, the alkali activator, the mineral admixture and the engineering waste soil are fully combined, and the alkali activator is used for exciting the engineering waste soil, so that the activity of the engineering waste soil is increased, and the paving brick with higher strength and better quality is prepared; in the paving brick, the content of the engineering waste soil is more than 50 percent, the waste resources are fully utilized, and the environmental development is facilitated; the paving brick is prepared by a press forming process, the preparation method is simple, and the cost is low.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
It should be noted that, in the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
In addition, in the present invention, if there is a description referring to "first", "second", etc., the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. In addition, the technical solutions of the respective embodiments may be combined with each other, but must be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should be considered to be absent and not be within the protection scope of the present invention.
The concrete pavement brick is made of cement and aggregate as main raw materials through processing, vibration pressing or other forming processes, has compression resistance and stability, can withstand rolling of pedestrians and vehicles, and is widely applied to various cities.
The analysis of the prior art shows that the main treatment mode for treating the engineering waste soil is to collect the engineering waste soil of each engineering and then carry out centralized management through built absorption places or treatment facilities, and the treatment mode has the problems that a large amount of manpower, material resources and financial resources are consumed to remove the engineering waste soil, the cost is high, the resources are not recycled, the resource waste condition exists, and the absorption places or the treatment facilities are easy to slide and easily cause life and property loss in extreme weather such as rainstorm. Therefore, how to reduce the treatment cost or effectively utilize the engineering waste soil is an urgent technical problem to be solved at present when the engineering waste soil is treated.
In view of the technical problems of high treatment cost and ineffective reutilization of engineering waste soil in the prior art, the invention provides a paving brick and a preparation method thereof, wherein the paving brick comprises the following components:
50-65 parts of engineering waste soil, 8-16 parts of alkali activator, 12-25 parts of mineral admixture, 1-2 parts of water reducer and 10-20 parts of water.
Specifically, in the components, the engineering waste soil can be residual soil left after the later-stage backfilling of each city construction engineering and is in a powder state; the alkali activator comprises at least one of water glass, sodium hydroxide, calcium hydroxide and sodium carbonate, and the alkali activator preferably selects the water glass with the concentration of 30% and the water glass modulus of 2.5; the mineral admixture is a mineral admixture with volcanic ash activity, and comprises at least one of fly ash, silica fume, mineral powder and metakaolin; the water reducing agent comprises a polycarboxylic acid high-efficiency water reducing agent with the water reducing rate of more than 25 percent.
The preparation method of the paving brick comprises the following steps:
step S11: mixing an alkali activator and a mineral admixture, and stirring to a gel state to obtain a gel mixture;
step S12: adding engineering waste soil, a water reducing agent and water into the gelled mixture, and stirring to a semi-dry state to obtain a mixture;
step S13: and pouring the mixture into a mold, performing pressure vibration for 5-10 seconds, and performing maintenance and demolding to obtain the paving brick.
Specifically, in step S13, a flat vibrator may be used to perform the pressing vibration, and the pressing vibration time may be specifically set according to actual situations.
Further, the present invention continues to provide a paving tile and a method of making the same, the paving tile comprising:
50-65 parts of engineering waste soil, 8-16 parts of alkali activator, 12-25 parts of mineral blending material, 1-2 parts of water reducing agent, 9-19 parts of water and 1-2 parts of fiber.
Specifically, in the components, the engineering waste soil can be residual soil left after the later-stage backfilling of each city construction engineering and is in a powder state; the alkali activator comprises at least one of water glass, sodium hydroxide, calcium hydroxide and sodium carbonate, and the alkali activator preferably selects the water glass with the concentration of 30% and the water glass modulus of 2.5; the mineral admixture is a mineral admixture with volcanic ash activity, and comprises at least one of fly ash, silica fume, mineral powder and metakaolin; the water reducing agent comprises a polycarboxylic acid high-efficiency water reducing agent with the water reducing rate of more than 25 percent; the fibers comprise at least one of PP fibers, PVA fibers, basalt fibers, glass fibers and glass fiber gridding cloth.
The preparation method of the paving brick comprises the following steps:
step S21: mixing an alkali activator and a mineral admixture, and stirring to a gel state to obtain a first mixture;
step S22: adding fibers into the first mixture, and stirring until the fibers are dispersed to obtain a second mixture;
step S23: adding engineering waste soil, a water reducing agent and water into the second mixture, and stirring to a semi-dry state to obtain a new mixture;
step S24: and pouring the new mixture into a mold, performing pressure vibration for 5-10 seconds, and performing maintenance and demolding to obtain the paving brick.
Specifically, in step S24, a flat vibrator may be used to perform the pressing vibration, and the pressing vibration time may be specifically set according to actual situations.
The invention utilizes the engineering waste soil as the main component to manufacture the paving brick, the engineering waste soil is effectively treated, the manufactured paving brick can be used for urban construction, and the method for treating the engineering waste soil can realize the recycling and utilization of the engineering waste soil without consuming excessive cost of manpower, material resources and the like; according to the invention, the alkali activator, the mineral admixture and the engineering waste soil are fully combined, the alkali activator is used for activating the engineering waste soil, and the activity of the processing procedure waste soil is increased, so that the paving brick with higher strength and better quality is prepared; in the paving brick, the content of the engineering waste soil reaches more than 50 percent, the waste resources are fully utilized, and the paving brick is beneficial to environmental development; the paving brick is prepared by a press forming process, the preparation method is simple, and the cost is low.
The effects of the various components of the paving tile and the variations in their parts by weight are described in detail below with reference to several examples.
Example 1
This embodiment provides a paving tile, includes: 50 parts by weight of engineering waste soil, 15 parts by weight of water glass, 24 parts by weight of silica fume, 1 part by weight of water reducing agent and 10 parts by weight of water.
Specifically, 15 parts by weight of water glass and 24 parts by weight of silica fume are mixed and fully stirred to a gelled state, so that a gelled mixture is obtained; then, adding 50 parts by weight of engineering waste soil, 1 part by weight of water reducing agent and 10 parts by weight of water into the gelled mixture, and fully stirring to a semi-dry state to obtain a mixture; and finally, pouring the mixture into a mold, performing pressure vibration for 5-10 s by using a flat vibrator, and then performing maintenance and demolding to obtain the paving brick of the embodiment.
Example 2
This embodiment provides a paving tile, includes: 65 parts by weight of engineering waste soil, 10 parts by weight of water glass, 14 parts by weight of silica fume, 1 part by weight of water reducing agent and 10 parts by weight of water.
Specifically, 10 parts by weight of water glass and 14 parts by weight of silica fume are mixed and fully stirred to a gelled state, so that a gelled mixture is obtained; then, adding 65 parts by weight of engineering waste soil, 1 part by weight of water reducing agent and 10 parts by weight of water into the gelled mixture, and fully stirring to a semi-dry state to obtain a mixture; and finally, pouring the mixture into a mold, performing pressure vibration for 5-10 s by using a flat vibrator, and then performing maintenance and demolding to obtain the paving brick of the embodiment.
Example 3
This embodiment provides a paving tile, includes: 50 parts by weight of engineering waste soil, 15 parts by weight of water glass, 24 parts by weight of silica fume, 1 part by weight of water reducing agent, 9 parts by weight of water and 1 part by weight of fiber.
Specifically, 15 parts by weight of water glass and 24 parts by weight of silica fume are mixed and sufficiently stirred to a gel state, so that a first mixture is obtained; then, adding 1 part by weight of fiber into the first mixture, and fully stirring until the fiber is dispersed to obtain a second mixture; adding 50 parts by weight of engineering waste soil, 1 part by weight of water reducing agent and 9 parts by weight of water into the second mixture, and fully stirring to a semi-dry state to obtain a new mixture; and finally, pouring the new mixture into a mold, performing pressure vibration for 5-10 s by using a flat plate vibrator, and performing maintenance and demolding to obtain the paving brick of the embodiment.
Example 4
This embodiment provides a paving tile, includes: 50 parts by weight of engineering waste soil, 9 parts by weight of sodium carbonate powder, 6 parts by weight of calcium hydroxide powder, 14 parts by weight of silica fume, 1 part by weight of water reducing agent, 19 parts by weight of water and 1 part by weight of fiber.
Specifically, 9 parts by weight of sodium carbonate powder, 6 parts by weight of calcium hydroxide powder, 14 parts by weight of silica fume and 19 parts by weight of water are mixed and sufficiently stirred to a gel state, so as to obtain a first mixture; then, adding 1 part by weight of fiber into the first mixture, and fully stirring until the fiber is dispersed to obtain a second mixture; adding 50 parts by weight of engineering waste soil and 1 part by weight of water reducing agent into the second mixture, and fully stirring to a semi-dry state to obtain a new mixture; and finally, pouring the new mixture into a mold, performing pressure vibration for 5-10 s by using a flat plate vibrator, and performing maintenance and demolding to obtain the paving brick of the embodiment.
The paving bricks prepared in the four examples were subjected to a compression test, a bending test and a water absorption test, respectively, to obtain test results shown in table 1:
TABLE 1
It should be noted that the higher the compressive strength, the stronger the compressive performance of the paving brick is; the higher the breaking strength is, the stronger the breaking resistance of the paving brick is; the lower the water absorption, the better the quality of the paving tile. Based on this, according to the comparison of the tests of the paving bricks of examples 1 to 4 in table 1 above, it was found that the compression-resistant effects of examples 1 and 3 are better than those of examples 2 and 4, the bending-resistant effect of example 3 is better than those of examples 1, 2 and 4, and example 2 has the highest water absorption and the worst quality. It can be seen that example 3 is the most preferred embodiment, and example 1 is the more preferred embodiment. The above examples were analyzed as follows:
1. example 1 is the same as example 2 in composition, except that in example 2 the weight parts of the engineering spoil are increased and the weight parts of the alkali activator and mineral admixture are decreased. As can be seen from table 1, the paving bricks obtained in example 2 are relatively weak in compression resistance, breaking resistance and mass compared to the paving bricks obtained in example 1. This is because the increase of the engineering waste soil and the decrease of the alkali activator cannot sufficiently activate the activity of the engineering waste soil, and the compression resistance and the fracture resistance of the paving brick are affected. Therefore, the alkali activator has the effects of fully activating the activity of the engineering waste soil and improving the strength of the prepared paving brick.
2. The compositions of example 1 and example 3 are different, and example 3 adds fibers compared with example 1, and the weight parts of other components are kept unchanged in example 1. As can be seen from table 1, the paving bricks prepared in example 3 have relatively high compression resistance, bending resistance and quality, and particularly the bending resistance is significantly improved, compared with the paving bricks prepared in example 1. This is because the addition of the fiber can effectively enhance the toughness of the paving brick and the flexural strength can be greatly improved. It can thus be seen that the fibres have the effect of further improving the flexural resistance in the present invention, but that the compression resistance, the flexural resistance and the quality of the paving tile produced, i.e. that of example 1, are not so poor, even without the addition of fibres, at least considerably better than the paving tiles of the prior art.
3. Both example 3 and example 4 added fibers except that the alkali activator of example 4 replaced the water glass of example 3 with sodium carbonate powder and calcium hydroxide powder, and accordingly, it was necessary to increase the weight part of water and decrease the weight part of silica fume. As can be seen from Table 1, the compression resistance and the breaking resistance of the paving brick obtained in example 4 were reduced compared to the paving brick obtained in example 3. This is because, although the alkali-activating agent is modified, the weight part of the alkali-activating agent is not modified, and the mineral admixture needs to be sufficiently blended with the alkali-activating agent to improve the strength of the paving brick, and therefore, the proportion of the mineral admixture is also ensured while the weight part ratio of the alkali-activating agent is ensured.
In conclusion, the paving brick prepared by taking the engineering waste soil as the main component has higher compression resistance and fracture resistance, lower water absorption and better quality; the prepared paving brick can be used for urban construction, engineering waste soil left over by the urban construction is effectively treated, the treatment mode does not need to consume excessive manpower, material resources and other costs, the recycling of the engineering waste soil is realized, the environmental development is facilitated, and the problem of resource waste is avoided. Meanwhile, the preparation of the paving brick adopts a press forming process, and the preparation method is simple, low in cost and convenient to apply and popularize.
It should be noted that the above-mentioned serial numbers of the embodiments of the present invention are merely for description, and do not represent the merits of the embodiments.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications made by the equivalent structures or equivalent processes within the spirit of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (10)
1. A paving tile, comprising:
50-65 parts by weight of engineering waste soil;
8-16 parts by weight of an alkali activator;
12-25 parts by weight of a mineral admixture;
1-2 parts by weight of a water reducing agent;
10 to 20 parts by weight of water.
2. The paving tile of claim 1, comprising:
50 parts by weight of engineering waste soil, 15 parts by weight of alkali activator, 24 parts by weight of mineral admixture, 1 part by weight of water reducing agent and 10 parts by weight of water.
3. The paving tile of claim 1, wherein the alkali-activator comprises at least one of water glass, sodium hydroxide, calcium hydroxide, and sodium carbonate.
4. The paving tile of claim 1, wherein the mineral blend is a pozzolanic mineral blend comprising at least one of fly ash, silica fume, mineral fines, metakaolin.
5. The paving brick of claim 1, wherein the water reducing agent comprises a polycarboxylic acid high efficiency water reducing agent having a water reduction rate of 25% or more.
6. A method for the production of a paving tile according to any of the claims 1 to 5, characterized in that it comprises the following steps:
mixing an alkali activator and a mineral admixture, and stirring to a gel state to obtain a gel mixture;
adding engineering waste soil, a water reducing agent and water into the gelled mixture, and stirring to a semi-dry state to obtain a mixture;
and pouring the mixture into a mold, performing pressure vibration for 5-10 seconds, and performing maintenance and demolding to obtain the paving brick.
7. A paving tile, comprising:
50-65 parts by weight of engineering waste soil;
8-16 parts by weight of an alkali activator;
12-25 parts by weight of a mineral admixture;
1-2 parts by weight of a water reducing agent;
9-19 parts by weight of water;
1 to 2 parts by weight of a fiber.
8. The paving tile of claim 7, comprising:
50 parts by weight of engineering waste soil, 15 parts by weight of alkali activator, 24 parts by weight of mineral admixture, 1 part by weight of water reducing agent, 9 parts by weight of water and 1 part by weight of fiber.
9. The paving tile of claim 7, wherein the fibers comprise at least one of PP fibers, PVA fibers, basalt fibers, glass fibers, and fiberglass scrim.
10. A method for the production of a paving tile according to any of claims 7 to 9, characterized in that it comprises the following steps:
mixing an alkali activator and a mineral admixture, and stirring to a gel state to obtain a first mixture;
adding fibers into the first mixture, and stirring until the fibers are dispersed to obtain a second mixture;
adding engineering waste soil, a water reducing agent and water into the second mixture, and stirring to a semi-dry state to obtain a new mixture;
and pouring the new mixture into a mold, performing pressure vibration for 5-10 seconds, and performing maintenance and demolding to obtain the paving brick.
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| CN202110911264.2A CN113651562A (en) | 2021-08-10 | 2021-08-10 | Paving brick and preparation method thereof |
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| CN106431028A (en) * | 2015-08-13 | 2017-02-22 | 吉林省圣翔建材集团有限公司 | Construction waste red brick powder and coal ash geopolymer material and preparation method thereof |
| CN110342862A (en) * | 2019-06-25 | 2019-10-18 | 广东工业大学 | Renewable unburned filtrate of one kind and preparation method thereof, application and regeneration method |
| CN111072329A (en) * | 2018-10-18 | 2020-04-28 | 厦门汉沃环保科技有限公司 | Alkali-activated waste residue soil baking-free brick and preparation method thereof |
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2021
- 2021-08-10 CN CN202110911264.2A patent/CN113651562A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106431028A (en) * | 2015-08-13 | 2017-02-22 | 吉林省圣翔建材集团有限公司 | Construction waste red brick powder and coal ash geopolymer material and preparation method thereof |
| CN111072329A (en) * | 2018-10-18 | 2020-04-28 | 厦门汉沃环保科技有限公司 | Alkali-activated waste residue soil baking-free brick and preparation method thereof |
| CN110342862A (en) * | 2019-06-25 | 2019-10-18 | 广东工业大学 | Renewable unburned filtrate of one kind and preparation method thereof, application and regeneration method |
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Application publication date: 20211116 |