CN115710107A - Water permeable brick and preparation method thereof - Google Patents
Water permeable brick and preparation method thereof Download PDFInfo
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- CN115710107A CN115710107A CN202211395966.0A CN202211395966A CN115710107A CN 115710107 A CN115710107 A CN 115710107A CN 202211395966 A CN202211395966 A CN 202211395966A CN 115710107 A CN115710107 A CN 115710107A
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- permeable brick
- water permeable
- water
- aggregate
- polypropylene fiber
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 239000011449 brick Substances 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000000835 fiber Substances 0.000 claims abstract description 63
- -1 polypropylene Polymers 0.000 claims abstract description 45
- 239000004743 Polypropylene Substances 0.000 claims abstract description 44
- 229920001155 polypropylene Polymers 0.000 claims abstract description 44
- 239000002699 waste material Substances 0.000 claims abstract description 12
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 11
- 239000011521 glass Substances 0.000 claims abstract description 11
- 239000011398 Portland cement Substances 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims abstract description 10
- 230000000996 additive effect Effects 0.000 claims abstract description 10
- 239000004567 concrete Substances 0.000 claims abstract description 10
- 239000012615 aggregate Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 8
- 239000004575 stone Substances 0.000 claims abstract description 7
- 239000003818 cinder Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 239000012153 distilled water Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 9
- 238000002791 soaking Methods 0.000 claims description 9
- 238000001723 curing Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 2
- 230000035699 permeability Effects 0.000 abstract description 11
- 239000003245 coal Substances 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 238000007873 sieving Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
- 239000011083 cement mortar Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 101100136092 Drosophila melanogaster peng gene Proteins 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011384 asphalt concrete Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
-
- 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
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a water permeable brick and a preparation method thereof, wherein the water permeable brick comprises the following components: aggregate, portland cement, polypropylene fiber and an additive. The aggregate is prepared by selecting waste concrete, coal cinder and broken stone, and crushing and sieving the waste concrete, the coal cinder and the broken stone by a crusher, so that the building pollution source is reduced, and the resource utilization rate is improved; the polypropylene fiber is modified by a silane coupling agent, so that the compressive strength of the water permeable brick is improved on the premise of ensuring the water permeability; the glass powder in the additive can make up the defect of poor fluidity of the polypropylene fiber water permeable brick. The aggregate permeable brick has high strength, can bear the load of a medium vehicle, and has good water permeability and stronger fluidity.
Description
Technical Field
The invention relates to the field of water permeable bricks, in particular to a water permeable brick and a preparation method thereof.
Background
At present, most road pavements in China are made of cement and asphalt concrete, so that the road pavements do not have the functions of water permeability and air permeability. Not only reduces the temperature and humidity adjusting capability of the city, but also can cause the heat island effect and waterlogging disasters of the city. The recycled aggregate permeable brick is a novel pavement material in recent years, and the construction industry garbage is prepared into the permeable brick according to special particle grading and a forming process, so that the urban 'heat island effect' is reduced, the construction garbage can be reduced, the utilization rate of wastes is improved, and the construction concept of ecological civilization is met.
The existing mainstream preparation process of the non-sintered water permeable brick has the problems of poor wear resistance and low strength, so that the service life of the water permeable brick is limited. The interface between the fiber and the matrix material has strong cohesiveness, high elastic modulus and good bond force, and the polypropylene fiber has the advantages of good corrosion resistance, no harm to people and stirring equipment and easy construction (research on the influence of the rigid polypropylene fiber on the strength and water permeability of the cement-based water permeable brick in Liu and Peng).
The patent publication Nos. CN106396491A and CN108821666A provide a polypropylene fiber water permeable brick with improved bending strength and compressive strength. However, in both cases of casting concrete and cement mortar, the fluidity is reduced by the addition of fibers (mechanical properties of modified polypropylene fiber cement mortar) (Wangyun). This also leads to problems such as poor cohesiveness of the mixture, poor water retention, segregation of the aggregate, etc. Therefore, how to reasonably utilize polypropylene fibers to improve the strength of the aggregate permeable brick still needs to be solved.
Disclosure of Invention
In view of the above, the invention provides a water permeable brick and a preparation method thereof, which improve the compressive strength of the water permeable brick by modifying polypropylene fibers on the premise of ensuring the water permeability.
The technical scheme of the invention is realized as follows: the invention provides a water permeable brick, which comprises the following components: aggregate, portland cement, polypropylene fiber and an additive.
Preferably, the water permeable brick comprises the following raw materials in parts by weight:
preferably, the polypropylene fiber is modified, and the processing process comprises the following steps:
s1, filling polypropylene bundled monofilament fibers into a sealed bag with an opening, blowing the bundled fibers into fluffy roots by using an air gun, removing surface residues, soaking the polypropylene fibers in an acetone solution for 1-2 hours, washing with distilled water for 3-5 times, and drying in the air;
s2, soaking the fiber obtained in the step S1 in a silane coupling agent solution for 6-8 hours, and then washing with distilled water until the pH value is 6-7;
and S3, placing the fiber obtained in the step S2 in an oven at the temperature of 80-85 ℃, and drying for 1-2 hours to obtain the modified polypropylene fiber.
Preferably, the silane coupling agent in step S2 comprises KH560 or KH570, and has a mass concentration of 0.5-1wt%.
Preferably, the aggregate comprises waste concrete, coal slag and broken stones, and is crushed and sieved by a crusher to have a particle size of 3-5mm.
Preferably, the admixture comprises glass powder and a polycarboxylic acid water reducing agent, and the mass ratio of the glass powder to the polycarboxylic acid water reducing agent is (1-2): 1.
preferably, the particle size of the glass powder is 75-300 μm.
Preferably, the portland cement strength grade is R42.5.
On the other hand, the invention also provides a preparation method of the water permeable brick, which comprises the following steps:
a1, adding aggregate, portland cement, polypropylene fiber and an additive into a stirrer, adding water according to a preset water-cement ratio, and stirring uniformly for later use;
a2, pouring the mixture obtained in the step A1 into a mold, carrying out vibration extrusion molding on the mixture under the pressure of 1.5-3Mpa, demolding, and standing for 1-2h;
and A3, transferring the water permeable brick obtained in the step A2 to a still kettle for curing at the pressure of 0.9-1.2MPa and the temperature of 180-190 ℃ for 8-10h to obtain the water permeable brick.
Preferably, the mass ratio of the water to the ash preset in the step A1 is (0.28-0.36): 1.
compared with the prior art, the water permeable brick has the following beneficial effects:
(1) Compared with the existing water permeable brick with low strength, the polypropylene fiber is modified by the silane coupling agent, the porosity of the fiber is reduced, the elastic modulus and the adhesive strength of the polypropylene fiber and a matrix are improved to a certain degree, a three-dimensional supporting framework structure with certain rigidity can be formed by low doping amount on the premise of ensuring the basic water permeability coefficient, and the effects of reinforcement, crack resistance and toughening are effectively exerted.
(2) When cement mortar is stirred in the existing polypropylene fiber water permeable brick, the fluidity of the mortar is reduced due to the introduction of polypropylene fiber. The low water absorption and surface smoothness of the glass powder can replace partial cement, promote the dilution of cement mortar, reduce the bonding degree between particles, further can adjust the fluidity of composite cementing materials such as cement, aggregate and the like, and improve the problem of poor fluidity of mortar.
(3) Compared with the standard curing mode in the preparation process of the conventional water permeable brick, the autoclave curing method disclosed by the invention has the advantages that the hydration speed of the cementing material is increased, the strength of the water permeable brick is improved, the curing period is shortened, and the production efficiency is improved.
(4) Most of the early permeable bricks are made of waste clay or ceramics, and a large amount of harmful gas is released in the sintering process of the waste clay to pollute the environment; the ceramic water permeable brick is easy to break, poor in durability and attenuated in water permeability. According to the water permeable brick, the aggregate is made of waste concrete of a construction site or a deported user, so that the waste is recycled, and the environmental pollution is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments of the present invention, belong to the protection scope of the present invention.
Example 1
A water permeable brick comprises the following components:
the aggregate comprises waste concrete, coal cinder and broken stone, the aggregate is crushed and sieved by a crusher until the particle size is 3mm, the polypropylene fiber is subjected to modification treatment, and the treatment process comprises the following steps:
s1, filling polypropylene bundled monofilament fibers into a sealed bag with an opening, blowing the bundled fibers into a fluffy root shape by using an air gun, removing surface residues, soaking the polypropylene fibers in an acetone solution for 1 hour, washing with distilled water for 3 times, and drying in the air;
s2, soaking the fiber obtained in the step S1 in a silane coupling agent solution for 6 hours, and washing with distilled water until the pH value is 6;
and S3, placing the fiber obtained in the step S2 in an oven at 80 ℃, and drying for 1h to obtain the modified polypropylene fiber.
The preparation method of the water permeable brick comprises the following steps:
a1, adding aggregate, portland cement, polypropylene fibers and an additive into a stirrer according to a mass ratio of 0.28: adding water into the water-cement ratio of 1, and uniformly stirring for later use;
a2, pouring the mixture obtained in the step A1 into a mould, performing vibration extrusion molding on the mixture under the pressure of 1.5MPa, demolding, and standing for 1 hour;
and A3, transferring the water permeable brick obtained in the step A2 to a still kettle for curing at the temperature of 180 ℃ under the pressure of 0.9MPa for 8 hours to obtain the water permeable brick.
Example 2
A water permeable brick comprises the following components:
the aggregate comprises waste concrete, coal cinder and broken stone, the aggregate is crushed and sieved by a crusher until the particle size is 5mm, the polypropylene fiber is subjected to modification treatment, and the treatment process comprises the following steps:
s1, filling polypropylene bundled monofilament fibers into a sealed bag with an opening, blowing the bundled fibers into a fluffy root shape by using an air gun, removing surface residues, soaking the polypropylene fibers in an acetone solution for 2 hours, washing with distilled water for 5 times, and drying in the air;
s2, soaking the fiber obtained in the step S1 in a silane coupling agent solution for 8 hours, and washing with distilled water until the pH value is 7;
and S3, placing the fiber obtained in the step S2 in an oven at 85 ℃, and drying for 2 hours to obtain the modified polypropylene fiber.
The preparation method of the water permeable brick comprises the following steps:
a1, adding aggregate, portland cement, polypropylene fibers and an additive into a stirrer according to a mass ratio of 0.36:1, adding water into the mixture, and uniformly stirring the mixture for later use;
a2, pouring the mixture obtained in the step A1 into a mold, performing vibration extrusion molding on the mixture under the pressure of 3MPa, demolding, and standing for 2 hours;
and A3, transferring the water permeable brick obtained in the step A2 to a still kettle for curing at the pressure of 1.2MPa and the temperature of 190 ℃ for 10 hours to obtain the water permeable brick.
Example 3
A water permeable brick comprises the following components:
the aggregate comprises waste concrete, coal cinder and broken stone, the aggregate is crushed and sieved by a crusher until the particle size is 4mm, the polypropylene fiber is subjected to modification treatment, and the treatment process comprises the following steps:
s1, filling polypropylene bundled monofilament fibers into a sealed bag with an opening, blowing the bundled fibers into a fluffy root shape by using an air gun, removing surface residues, soaking the polypropylene fibers in an acetone solution for 2 hours, washing with distilled water for 4 times, and drying in the air;
s2, placing the fibers obtained in the step S1 into silane coupling agent solutions to be respectively soaked for 7 hours, and then washing the fibers with distilled water until the pH value is 6.5;
and S3, placing the fiber obtained in the step S2 in an oven at 82 ℃, and drying for 1.5h to obtain the modified polypropylene fiber.
The preparation method of the water permeable brick comprises the following steps:
a1, adding aggregate, portland cement, polypropylene fibers and an additive into a stirrer, wherein the mass ratio of the aggregate to the portland cement to the polypropylene fibers is 0.30:1, adding water into the mixture, and uniformly stirring the mixture for later use;
a2, pouring the mixture obtained in the step A1 into a mold, performing vibration extrusion molding on the mixture under the pressure of 2MPa, demolding, and standing for 1.5 hours;
and A3, transferring the water permeable brick obtained in the step A2 to a still kettle for curing at the pressure of 1.0MPa and the temperature of 185 ℃ for 9 hours to obtain the water permeable brick.
Examples 4 to 6
A water permeable brick is different from example 1 in the composition, mass concentration, particle size of glass frit and water-cement ratio of a silane coupling agent.
Table 1 examples 1-6 components of silane coupling agent, glass frit particle size and water-to-cement ratio screening conditions
Comparative example 1
A water permeable brick is different from the brick in example 1 in that polypropylene fibers are not introduced, the brick is filled with fine aggregate, and the brick is weighed to match the brick in example 1.
Comparative example 2
A water permeable brick is different from the brick in example 1 in that polypropylene fibers are not modified, and the weighed mass is matched with that in example 1.
Comparative example 3
The difference between the permeable brick and the brick in the embodiment 1 is that the admixture does not contain glass powder, and the weighed mass is matched with that in the embodiment 1.
Performance test
The water permeability coefficient (mm/s) of the bricks in each embodiment and the comparative example, and the breaking strength (MPa), freezing resistance (comprising single block mass loss rate, top surface defect depth after freezing and strength loss rate), wear resistance (grinding pit length) and skid resistance of the bricks in 7d and 28d are tested according to the method specified in the national standard GB/T25993-2010 permeable pavement bricks and permeable pavement slabs respectively; testing the compression strength (MPa) of bricks 7d and 28d of each example and the comparative example according to a method specified in a national standard GB/T50081-2002 standard for testing the mechanical properties of common concrete; the fluidity of the bricks of the examples and the comparative examples was measured according to the method specified in the national standard GB/T2419-2005 "Cement mortar fluidity measuring method".
Table 2 results of performance tests
As can be seen from the above, the water permeability is still higher than the national class A standard (2X 10) although the water permeability is reduced after the modified polypropylene fiber is introduced -1 mm/s); in addition, the fluidity, the compressive strength and the breaking strength are all obviously improved, wherein the compressive strength reaches C40, and the urban medium-sized vehicle can be loaded.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (9)
1. The water permeable brick is characterized by comprising the following components: aggregate, portland cement, polypropylene fiber and an additive.
2. The water permeable brick of claim 1, which comprises the following raw materials in parts by weight:
3. the water permeable brick of claim 1, wherein the polypropylene fiber is modified by a process comprising the steps of:
s1, filling polypropylene bundled monofilament fibers into a sealed bag with an opening, blowing the bundled fibers into fluffy roots by using an air gun, removing surface residues, soaking the polypropylene fibers in an acetone solution for 1-2 hours, washing with distilled water for 3-5 times, and drying in the air;
s2, soaking the fiber obtained in the step S1 in a silane coupling agent solution for 6-8 hours, and then washing with distilled water until the pH value is 6-7;
and S3, placing the fiber obtained in the step S2 in an oven at the temperature of 80-85 ℃, and drying for 1-2 hours to obtain the modified polypropylene fiber.
4. The water permeable brick of claim 3, wherein the silane coupling agent solution component in step S2 comprises KH560 or KH570 and has a mass concentration of 0.5-1wt%.
5. The water permeable brick of claim 1, wherein the aggregate comprises waste concrete, cinder and crushed stone, and is crushed and sieved by a crusher to have a particle size of 3-5mm.
6. The water permeable brick of claim 1, wherein the additive comprises glass powder and a polycarboxylic acid water reducing agent, and the mass ratio of the glass powder to the polycarboxylic acid water reducing agent is (1-2): 1.
7. the water permeable brick of claim 6, wherein the glass frit has a particle size of 75 to 300 μm.
8. The method for preparing a water permeable brick according to any one of claims 1 to 7, comprising the steps of:
a1, adding aggregate, portland cement, polypropylene fiber and an additive into a stirrer, adding water according to a preset water-cement ratio, and stirring uniformly for later use;
a2, pouring the mixture obtained in the step A1 into a mold, carrying out vibration extrusion molding on the mixture under the pressure of 1.5-3Mpa, demolding, and standing for 1-2 hours;
and A3, transferring the water permeable brick obtained in the step A2 to a still kettle for curing at the pressure of 0.9-1.2MPa and the temperature of 180-190 ℃ for 8-10h to obtain the water permeable brick.
9. The method for preparing the water permeable brick according to claim 8, wherein the mass ratio of the water and the ash preset in the step A1 is (0.28-0.36): 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211395966.0A CN115710107A (en) | 2022-11-08 | 2022-11-08 | Water permeable brick and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211395966.0A CN115710107A (en) | 2022-11-08 | 2022-11-08 | Water permeable brick and preparation method thereof |
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| CN115710107A true CN115710107A (en) | 2023-02-24 |
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| CN202211395966.0A Pending CN115710107A (en) | 2022-11-08 | 2022-11-08 | Water permeable brick and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116283169A (en) * | 2023-04-14 | 2023-06-23 | 湖北浩川水利水电工程有限公司 | Anti-seepage and anti-leakage material, preparation method and application |
| CN117125958A (en) * | 2023-08-01 | 2023-11-28 | 福建潭晟建筑工程有限公司 | Preparation method of modified bamboo fiber reinforced filter material-sandwiched water permeable brick |
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| CN117125958A (en) * | 2023-08-01 | 2023-11-28 | 福建潭晟建筑工程有限公司 | Preparation method of modified bamboo fiber reinforced filter material-sandwiched water permeable brick |
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