CN115368087B - Ecological slope protection brick - Google Patents
Ecological slope protection brick Download PDFInfo
- Publication number
- CN115368087B CN115368087B CN202211175916.1A CN202211175916A CN115368087B CN 115368087 B CN115368087 B CN 115368087B CN 202211175916 A CN202211175916 A CN 202211175916A CN 115368087 B CN115368087 B CN 115368087B
- Authority
- CN
- China
- Prior art keywords
- slope protection
- ecological slope
- cement
- protection brick
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000011449 brick Substances 0.000 title claims abstract description 68
- 239000004568 cement Substances 0.000 claims abstract description 46
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 32
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 27
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 27
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 26
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000004576 sand Substances 0.000 claims abstract description 13
- 239000004575 stone Substances 0.000 claims abstract description 13
- 239000000835 fiber Substances 0.000 claims description 40
- 241000196324 Embryophyta Species 0.000 claims description 31
- 240000000491 Corchorus aestuans Species 0.000 claims description 21
- 235000011777 Corchorus aestuans Nutrition 0.000 claims description 21
- 235000010862 Corchorus capsularis Nutrition 0.000 claims description 21
- 244000025254 Cannabis sativa Species 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 10
- 230000001788 irregular Effects 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 abstract description 17
- 238000006731 degradation reaction Methods 0.000 abstract description 17
- 239000002689 soil Substances 0.000 abstract description 14
- 239000004567 concrete Substances 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 230000008635 plant growth Effects 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 239000004566 building material Substances 0.000 abstract description 2
- 239000002562 thickening agent Substances 0.000 abstract description 2
- 239000011083 cement mortar Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 33
- 238000010257 thawing Methods 0.000 description 18
- 238000010276 construction Methods 0.000 description 10
- 230000008859 change Effects 0.000 description 8
- 239000000523 sample Substances 0.000 description 8
- 239000013074 reference sample Substances 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 241001374849 Liparis atlanticus Species 0.000 description 2
- 238000009933 burial Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 240000008564 Boehmeria nivea Species 0.000 description 1
- 240000006240 Linum usitatissimum Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002025 wood fiber Substances 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
- 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
-
- 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
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/248—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork from specific plants, e.g. hemp fibres
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2652—Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
- C04B24/383—Cellulose or derivatives thereof
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/205—Securing of slopes or inclines with modular blocks, e.g. pre-fabricated
-
- 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
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
-
- 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
- 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)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Botany (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of building materials, in particular to an ecological slope protection brick, which comprises, by weight, 520-560 parts of stones, 310-330 parts of natural sand, 130-170 parts of cement and 60-75 parts of water; the cement mortar also comprises 0.9% -2.7% of polyacrylamide by weight of cement. The invention improves the raw materials and the proportion of the existing ecological slope protection brick, and newly adds materials such as polyacrylamide, carboxymethyl cellulose and the like, wherein the polyacrylamide can effectively improve the workability of concrete and enhance cohesiveness, and the carboxymethyl cellulose has the functions of a thickener and an adhesive, has good degradability, can effectively reduce the consumption of cement, and reduces secondary pollution to the environment; promote the ecological slope protection brick to accelerate degradation and improve soil environment, promote plant growth and ecological restoration, and realize sustainable ecological slope protection effect.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to an ecological slope protection brick.
Background
Currently, environmental problems during highway construction are increasingly prominent. For example, exposed side slopes formed in expressway construction are extremely easy to erode by natural factors such as external wind, rain, freezing and the like; when the rain season is met, the rain water is easy to wash, so that water and soil loss, even integral landslide and the like are caused. For this reason, concrete pouring, stone laying, slope protection brick laying, and the like are often adopted in the prior art.
Under the construction scenes, the best mode is that the side slope can be protected by enough supporting strength in the construction process, and the natural state of vegetation coverage can be restored after the construction is completed. This effect is not achieved by the prior art.
For example, the Chinese patent application number is 201911088114.5 and the publication number is CN110698121A, and the invention discloses an ecological slope protection brick and a preparation method thereof, wherein the slope protection brick is paved for soil solidification.
The above prior art also has a number of problems:
1. the existing slope protection technology does not adopt a circulating ecological concept, does not carry out integral optimization on the slope ecological development alternate evolution process, and cannot realize the ecological slope protection effect of sustainable development.
2. In the prior art, the plant growth is inhibited by adopting the traditional raw materials such as stones, sand, cement and the like, the strength can be kept for a very long time in the nature, and sometimes vegetation on a side slope can be completely grown and recovered only after the plant growth is manually removed.
Disclosure of Invention
The invention aims to provide an ecological slope protection brick, which aims to solve the problems that the existing ecological slope protection brick is mainly manufactured by adopting stone, sand, cement and other traditional production raw materials, so that plant growth is inhibited, and the natural environment is difficult to recover for a long time after construction is completed.
The ecological slope protection brick is improved from traditional production raw materials, and materials such as polyacrylamide, carboxymethyl cellulose and the like are added on the basis of the existing raw materials; the cement can effectively reduce the using amount of cement, improve cohesiveness, maintain short-term strength, easily accelerate degradation in the later period under natural conditions, reduce secondary pollution to the environment, and finally achieve good slope protection effects of sustainable and ecological cycle.
The invention fully utilizes the natural development rule and adopts the technical means to integrally optimize the ecological development alternate evolution process. The ecological slope protection brick provided by the invention is provided with holes with different sizes, wherein herbaceous plants are planted in the small holes, and woody plants are planted in the large holes. Paving ecological slope protection bricks at the beginning of highway construction, and mainly utilizing the ecological slope protection bricks to solidify soil in the early stage to prevent rain erosion; the medium term is to use the grown herbaceous plants and ecological slope protection bricks to solidify soil together; over time, woody plants have survived and had a luxuriant root system, and later on, water and soil are cured for a long period of time by the woody plants and the herbaceous plants together. After a period of time, the ecological slope protection bricks are aged and degraded gradually, finally return to nature, and dynamic balance of ecological environment is realized.
Based on the purposes, the invention provides an ecological slope protection brick, which comprises, by weight, 520-560 parts of stones, 310-330 parts of natural sand, 130-170 parts of cement and 60-75 parts of water; also included are polyacrylamides.
Further, the weight part of the polyacrylamide is 0.9% -2.7% of the weight part of the cement; more preferably, the weight part of the polyacrylamide is 1.8% -2.2% of the weight part of the cement.
Further, the raw materials also comprise carboxymethyl cellulose, wherein the weight part of the carboxymethyl cellulose is 0.9-3.5% of the weight part of the cement; more preferably, the weight part of the carboxymethyl cellulose is 2.5% -2.9% of the weight part of the cement.
Further, the more preferable scheme of the ecological slope protection brick is that the weight ratio of water to cement is (0.41-0.47): 1.
further, the ecological slope protection brick is more preferably prepared from the following raw materials of 5-12 parts by weight of plant fibers, and concrete is slag.
The ecological slope protection brick is a polygonal prism, and the shape of the ecological slope protection brick is any one of triangular prism, quadrangular prism, pentagonal prism, hexagonal prism or irregular prism. The upper surface of the ecological slope protection brick is provided with grass planting holes, and the ratio of the grass planting hole area to the upper surface area of the ecological slope protection brick is (0.35-0.6): 1.
the invention has the beneficial effects that:
(1) The polyacrylamide in the technical scheme provided by the invention can effectively improve the workability of concrete, enhance cohesiveness, has better degradability, can effectively reduce the use amount of cement, and reduces secondary pollution to the environment.
(2) According to the technical scheme provided by the invention, the carboxymethyl cellulose has the functions of a thickening agent and an adhesive, so that the using amount of cement can be reduced, and good effects of accelerating degradation and improving soil are achieved.
(3) The invention can reduce the dead weight of the slope protection brick by adding a proper amount of plant fibers, is convenient for construction and laying, and has the characteristics of easy natural degradation, water permeability improvement and the like.
(4) The ecological slope protection brick provided by the invention can be provided with a larger grass planting hole space, and the grass planting hole not only can be used for planting herbaceous plants, but also can be used for planting woody plants, so that the ecological slope protection function can be better realized.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only of the invention and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a graph showing the change in compressive strength of a prior art reference sample A in a freeze-thawing test according to the present invention;
FIG. 2 is a graph showing the change of compressive strength in a freeze thawing test after adding polyacrylamide according to the embodiment of the invention;
FIG. 3 is a graph showing the change in compressive strength of freeze thawing test after addition of carboxymethyl cellulose according to the embodiment of the present invention;
FIG. 4 is a graph showing the change in compressive strength of the freeze thawing test after reducing the cement dosage according to the present invention;
FIG. 5 is a schematic view of an ecological slope protection brick according to the present invention;
FIG. 6 is a second schematic view of the structure of the ecological slope protection brick of the present invention;
FIG. 7 is a third schematic view of the structure of the ecological slope protection brick of the present invention.
Marked in the figure as:
1. a brick body; 2. grass planting holes.
Detailed Description
The present invention will be further described in detail with reference to specific embodiments in order to make the objects, technical solutions and advantages of the present invention more apparent.
It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which the present invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The following implementation examples of the invention all adopt GB/T50082-2009 standard for testing the long-term performance and durability of common concrete to carry out an anti-freezing test; compression test is carried out according to GB/T50081 Standard of test method for mechanical Properties of common concrete. The invention relates to concrete proportions, which are all tested, adjusted and determined by adopting the common concrete proportion design rule (JGJ 55-2011).
1. The brands and specifications of the materials required for the test of the invention are as follows.
And (3) cement: the cement of the sea snail brand produced by Anhui sea snail cement Co., ltd is adopted, and the grade is 32.5 ordinary Portland cement;
stone: selecting stones with the particle size of 10-15 mm;
sand: natural sand with the grain diameter of 0.5-2.5mm is selected;
water: common tap water is selected;
slag: slag with the grain diameter of 8-13mm is selected;
polyacrylamide PAM: selecting a 'Ruixing' brand polyacrylamide produced by Texas Ruixing water purification raw material limited company, and selecting an anionic polyacrylamide with the molecular weight of 1800 ten thousand;
carboxymethyl cellulose CMC: the carboxymethyl cellulose of the Haite brand produced by the Tonkan Senxuan cellulose Limited company is selected.
2. To test the durability of each example, the inventive example selects the freeze resistance test that best reflects the durability index. The embodiment of the invention adopts 25 interval freeze thawing cycles specified in GB/T50082-2009, and simultaneously adopts 5, 10, 15 and 20 freeze thawing cycles in order to reflect the variation of the freeze thawing intensity below 25 times.
3. Test procedure
3.1 selecting a concrete formula for the ecological slope protection brick commonly used in the prior art as a reference sample, wherein the concrete formula comprises the following raw materials in parts by weight: 540 parts of cobble, 320 parts of natural sand, 155 parts of cement and 67 parts of water.
3.2 reference sample a:
3.2.1 the reference sample A comprises the following components in parts by weight: 540 parts of cobble, 320 parts of natural sand, 155 parts of cement and 67 parts of water.
3.2.2 the compressive strength of the reference sample A after curing for 28 days was 30.21MPa. The following examples of the present invention relate to "0" times of freeze thawing test compressive strength, which refers to the compressive strength of concrete after 28 days of curing.
3.2.3 reference sample A Freeze thawing test
3.3 first group: adding polyacrylamide material based on the reference sample A, wherein the weight part of added polyacrylamide is 0.9% -2.7% of cement (or 1.4-4.2% of polyacrylamide); and dissolving and mixing polyacrylamide with the water in parts by weight, uniformly mixing with other materials, and stirring to prepare a sample B.
Through analysis of the first group of test results, after 50 freeze thawing cycles, the compressive strength of part of samples B is reduced to below 10MPa, and the related requirements of test evaluation can be met. After 50 freeze thawing cycles, the first group reflects samples with a reasonable range of B4\B5\B6; and selecting the B5 sample as a first group of samples with optimal polyacrylamide content.
Visual observation: observing the appearance change of the first group of test samples B1-B7 after being subjected to freeze thawing cycle for 50 times, wherein B1-B2 are cracked on the surface of the test piece compared with A; compared with the A, the surface cracks of the test piece are obviously increased and a small amount of peeling phenomenon occurs at corners of the test piece B3-B4; compared with A, B5-B7 has the advantages that the crack gaps of the test piece are increased, the number of cracks is increased, and the integral flaking phenomenon is obvious.
3.4 second group: based on sample B5 example, carboxymethyl cellulose material was added; the weight part of the carboxymethyl cellulose is 0.9% -3.5% of cement (or the weight part of added carboxymethyl cellulose is 1.4-5.4); and dissolving and mixing the carboxymethyl cellulose with the water in parts by weight, and uniformly mixing and stirring the mixture with other materials to prepare the sample block C.
Through analysis of the second group of test results, after 25 freeze thawing cycles, the compressive strength of part of C samples is reduced to below 10MPa, and the related requirements of test evaluation can be met. After 25 freeze thawing cycles, the second group of samples reflects samples with a reasonable range of C4\C5\C6, wherein the optimal content is C5 samples.
Visual observation: observing the appearance change of the second group of test samples C1-C7 after the second group of test samples C1-C7 are subjected to freeze thawing cycle for 25 times, wherein the overall shape of the test piece is not obviously changed compared with that of the test piece A, and cracks appear on the surface of the test piece; compared with A, C4-C5 has obviously increased surface cracks and a few flaking phenomena at corners; compared with A, the C6-C7 has the advantages that the integral shape of the test piece is changed, the crack gaps of the test piece are increased, the number of cracks is increased, and the integral flaking phenomenon is obvious.
3.5 third group the second group of C5 samples was selected as the optimum content and tested by reducing the weight of cement.
Through analysis of the third group of test results, the compressive strength of the samples D1-D4 after the freeze thawing test is rapidly attenuated, and the compressive strength losses of D3 and D4 are excessive; and taking the D2 sample as a sample of the cement proportioning optimal scheme.
Visual observation: and observing the appearance change of the third group of test samples D1-D4 after the third group of test samples D1-D4 are subjected to freeze thawing cycle, wherein the cracks are obvious and part of aggregate is peeled off, the whole deformation of the samples D3-D4 is large, and the aggregate is seriously peeled off.
3.6 fourth group based on example D2, the content of the tailing slag substitute stone of the sample was adjusted.
And through analysis of a fourth group of test results, the initial compressive strength of the slag after replacing stones on the basis of the sample D2 is 24.32MPa, and the compressive strength after 25 freeze thawing cycles is less than 10MPa, so that the slag meets the expected design requirements.
4. Conclusion:
the proportioning scheme of the invention is as follows: the ecological slope protection brick is prepared from the following materials in parts by weight: 540 parts of slag, 320 parts of natural sand, 136 parts of cement and 67 parts of water; the scheme also comprises polyacrylamide and carboxymethyl cellulose, wherein the weight part of the polyacrylamide is 0.9-2.7% of cement; the weight portion of the carboxymethyl cellulose is 0.9% -3.5% of cement.
The technical scheme provided by the invention improves and optimizes the traditional production raw materials, adds materials such as polyacrylamide, carboxymethyl cellulose and the like on the basis of the existing raw materials, further screens and processes the raw materials, optimizes the proportion of coarse aggregates, fine aggregates and the like with different particle diameters, can effectively reduce the use amount of cement, can improve cohesiveness and maintain short-term strength, is easy to accelerate degradation in the later period under natural conditions, reduces secondary pollution to the environment, and finally achieves good slope protection effects of sustainable and ecological circulation. In the construction process of the ecological slope protection brick, the ecological slope protection bricks are mutually matched and laid, the brick bodies are firmly connected, a mutually embedded structure is formed, and the overall stability of the ecological slope protection is improved.
According to the ecological slope protection brick provided by one or more embodiments of the specification, the raw materials comprise, by weight, 520-560 parts of stones, 310-330 parts of natural sand, 130-170 parts of cement and 60-75 parts of water; also comprises polyacrylamide; the weight portion of the polyacrylamide is 0.9% -2.7% of the weight portion of the cement, and the raw materials of the polyacrylamide further comprise carboxymethyl cellulose, wherein the weight portion of the carboxymethyl cellulose is 0.9% -3.5% of the weight portion of the cement.
Further preferably, the ecological slope protection brick is prepared from the following materials in parts by weight: comprises 530-550 parts of cobble, 315-325 parts of natural sand, 150-160 parts of cement and 63-71 parts of water; the cement comprises cement, polyacrylamide and carboxymethyl cellulose, wherein the weight part of the polyacrylamide is 1.6-2.4% of the weight part of the cement; the weight portion of the carboxymethyl cellulose is 2.3% -3.0% of the weight portion of the cement.
Further preferably, the weight part of the polyacrylamide is 1.8% -2.2%, most preferably 2.0% of the weight part of the cement.
Further preferably, the weight part of the carboxymethyl cellulose is 2.5% -2.9%, most preferably 2.7% of the weight part of the cement.
Further preferably, the ecological slope protection brick is more preferably characterized in that the weight ratio of the water to the cement is (0.41-0.47): 1, most preferably 0.45.
Further preferably, the stones are embodied as slag.
Further preferably, the slope protection brick raw material further comprises 5-12 parts by weight of plant fibers, wherein the plant fibers can be straw fibers or jute fibers.
In some alternative embodiments, the revetment brick raw material further comprises plant fiber; the plant fiber is easy to degrade naturally, and meanwhile, the dead weight of the slope protection brick can be reduced, so that the construction and the laying are facilitated. The plant fiber can be one of jute fiber, wood fiber, bamboo fiber, crop straw fiber, flax fiber, ramie fiber and the like. The invention is preferably jute fiber, the jute fiber has better strength, the average breaking strength of the jute technical fiber is about 2.7cN/dtex, and the breaking elongation is 2.3% -3.5%. After the jute fiber is degraded, the jute fiber can also be used as a fertilizer for slope protection plants, so that the slope protection plants are promoted to grow, and the slope protection effect is enhanced.
Further, the ecological slope protection brick is prepared from the following materials in parts by weight: 540 parts of slag, 320 parts of natural sand, 148 parts of cement, 67 parts of water and 8 parts of plant fiber; 3.1 parts by weight of polyacrylamide; the weight part of the carboxymethyl cellulose is 4.2 parts. The polyacrylamide can lock free water in the interior, so that humidity balance is maintained; and can agglomerate the concrete into uniform gel, and improve the cohesiveness of the concrete.
In some optional specific embodiments, the brick body of the ecological slope protection brick provided by the invention is polygonal, and the ecological slope protection brick is any one of triangular prism, quadrangular prism, pentagonal prism, hexagonal prism or irregular prism. Ecological slope protection brick mutually supports the installation and lays, forms mutual embedded structure, has strengthened the firm degree between the brick body, improves whole bank protection stability. In addition, ecological slope protection brick structure also can adopt the adjacent range of single structure to lay, assemble into grass planting hole with its concave part pairwise butt joint, increase grass planting hole area. The ratio of the area of the grass planting hole to the area of the upper surface of the brick body is (0.35-0.6): 1.
the length of the plant fiber is 12-18 mm, and the length of the plant fiber is 15mm in a more preferable scheme. The plant fiber is preferably jute fiber, and the length of jute single fiber is generally 1-2.5 mm, so that the invention needs to adopt bunched jute technical fiber, and the length is selected to be 10-20mm, preferably 15mm. The jute fiber raw material has low cost and is easy to degrade.
The natural degradation of the ecological slope protection brick fully utilizes the self-degradability of polyacrylamide and carboxymethyl cellulose, and has the good effects of accelerating degradation and improving soil. In addition, the natural degradation of jute fiber plays a good role in promoting. Because jute fibers are arranged in the ecological slope protection brick, the related data of degradation characteristics cannot be obtained through physical sampling, and the degradation characteristics of jute fibers along with the change of degradation time can be studied only by testing the quality loss rate and the tensile strength of jute fibers after the jute fibers are exposed to two environments of the outdoor environment and the soil burial environment (damp soil) for different time periods. According to the research results of natural degradation performance research published by the university textile institute Yang Zhanyuan and Yan Baopu teacher, the specific table is shown below.
From the above table, jute fibers differ in their degradation characteristics over time in both outdoor and soil burial (wet soil) environments of exposure. Considering that the physical environment of the ecological slope protection brick is between the two environments, the degradation characteristic value range of the jute fiber in the physical environment of the ecological slope protection brick can be accurately estimated, namely, the natural degradation rate value range of the jute fiber is 37.82-100% in a 160-day period; and further, the natural degradation period of the jute fiber is 160-423 days.
After the ecological slope protection brick reaches the degradation period, the ecological slope protection brick also starts to degrade slowly and naturally. Firstly, the herbaceous plants planted on the ecological slope protection bricks survive and thrive, and the herbaceous plants and the ecological slope protection bricks solidify soil together; secondly, woody plants also survive and grow luxuriant root systems, and as time goes on, the woody plants and the herbaceous plants solidify water and soil together for a long time; finally, the ecological slope protection brick is aged and degraded gradually from the inside, and finally returns to nature. The invention fully utilizes the natural development rule and optimizes the ecological development alternation evolution process integrally. Finally, the good slope protection effect of sustainable and ecological cycle is achieved.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the invention (including the claims) is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
The present invention is intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present invention should be included in the scope of the present invention.
Claims (4)
1. The ecological slope protection brick is characterized by comprising, by weight, 530-550 parts of stones, 315-325 parts of natural sand, 150-160 parts of cement and 63-71 parts of water; the cement comprises cement, polyacrylamide and carboxymethyl cellulose, wherein the weight part of the polyacrylamide is 1.8% -2.2% of the weight part of the cement; the weight part of the carboxymethyl cellulose is 2.5% -2.9% of the weight part of the cement, the slope protection brick raw material further comprises plant fibers, the weight part of the plant fibers is 5-12, and the plant fibers are jute fibers;
the ecological slope protection brick is provided with holes with different sizes so as to be used for planting herbaceous plants and woody plants respectively.
2. The ecological slope protection brick according to claim 1, wherein the weight ratio of water to cement is (0.41-0.47): 1.
3. the ecological slope protection brick according to claim 1, characterized in that the stones are in particular slag.
4. The ecological slope protection brick according to claim 1, wherein the ecological slope protection brick is polygonal, the ecological slope protection brick is in the shape of any one of triangular prism, quadrangular prism, pentagonal prism, hexagonal prism or irregular prism, grass planting holes are formed in the ecological slope protection brick, and the ratio of the grass planting hole area to the upper surface area of the ecological slope protection brick is (0.35-0.6): 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211175916.1A CN115368087B (en) | 2022-09-26 | 2022-09-26 | Ecological slope protection brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211175916.1A CN115368087B (en) | 2022-09-26 | 2022-09-26 | Ecological slope protection brick |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115368087A CN115368087A (en) | 2022-11-22 |
| CN115368087B true CN115368087B (en) | 2024-03-15 |
Family
ID=84074131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211175916.1A Active CN115368087B (en) | 2022-09-26 | 2022-09-26 | Ecological slope protection brick |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115368087B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115745190A (en) * | 2022-12-13 | 2023-03-07 | 重庆大学 | Stepped landscape artificial wetland |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50113525A (en) * | 1973-12-17 | 1975-09-05 | ||
| CN105731901A (en) * | 2016-02-19 | 2016-07-06 | 山东源根化学技术研发有限公司 | Technology for producing high-strength environment-friendly inflaming-retarding waterproof and fireproof building material |
| CN106467371A (en) * | 2016-09-27 | 2017-03-01 | 山东江泰建材科技有限公司 | A kind of freeze proof melt type concrete pump-feed agent |
| CN106746883A (en) * | 2016-12-17 | 2017-05-31 | 濮阳市龙建商砼有限公司 | A kind of cement additire and preparation method thereof |
| CN108793885A (en) * | 2018-07-25 | 2018-11-13 | 蚌埠科睿达机械设计有限公司 | A kind of high intensity self-healing concrete |
| CN110698121A (en) * | 2019-11-08 | 2020-01-17 | 马鞍山宏泰建材股份有限公司 | Ecological slope protection brick and preparation method thereof |
| CN115094924A (en) * | 2022-06-28 | 2022-09-23 | 湖南大学 | Prefabricated ecological vegetation slope protection brick and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6942726B2 (en) * | 2002-08-23 | 2005-09-13 | Bki Holding Corporation | Cementitious material reinforced with chemically treated cellulose fiber |
-
2022
- 2022-09-26 CN CN202211175916.1A patent/CN115368087B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50113525A (en) * | 1973-12-17 | 1975-09-05 | ||
| CN105731901A (en) * | 2016-02-19 | 2016-07-06 | 山东源根化学技术研发有限公司 | Technology for producing high-strength environment-friendly inflaming-retarding waterproof and fireproof building material |
| CN106467371A (en) * | 2016-09-27 | 2017-03-01 | 山东江泰建材科技有限公司 | A kind of freeze proof melt type concrete pump-feed agent |
| CN106746883A (en) * | 2016-12-17 | 2017-05-31 | 濮阳市龙建商砼有限公司 | A kind of cement additire and preparation method thereof |
| CN108793885A (en) * | 2018-07-25 | 2018-11-13 | 蚌埠科睿达机械设计有限公司 | A kind of high intensity self-healing concrete |
| CN110698121A (en) * | 2019-11-08 | 2020-01-17 | 马鞍山宏泰建材股份有限公司 | Ecological slope protection brick and preparation method thereof |
| CN115094924A (en) * | 2022-06-28 | 2022-09-23 | 湖南大学 | Prefabricated ecological vegetation slope protection brick and preparation method thereof |
Non-Patent Citations (5)
| Title |
|---|
| Dahlan,NA et al.Smart Hydrogel of Carboxymethyl Cellulose Grafted Carboxymethyl polyvinyl Alcohol and properties Studied for Future Material Applications.《jounal of polymers and the environment》.2018,第26卷第2061-2071页. * |
| 水基聚合物在混凝土中的应用;冉千平, 刘加平;高分子通报;20030630(第03期);第66-72页 * |
| 聚合物改性水泥基复合材料研究进展;徐冰;汪梦月;张震;秦刚;;四川水泥;20180215(第02期);第19页 * |
| 聚合物改性粉煤灰建筑砂浆粉;赵碧华, 周向阳, 严丽;砖瓦;20040930(第09期);第44-45页 * |
| 邓德华等.《土木工程材料》.中国铁道出版社,2010,第144页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115368087A (en) | 2022-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107963838B (en) | Ecological spray anchor slope protection structure and method | |
| CN108911672B (en) | Phosphogypsum-based vegetation concrete and construction method thereof | |
| CN104264692B (en) | A kind of side slope ecological renovation method | |
| CN104030642B (en) | A kind of fibrous concrete | |
| CN115368087B (en) | Ecological slope protection brick | |
| CN107935445B (en) | Permeable concrete reinforcing agent and preparation method thereof | |
| CN104402339A (en) | Pervious concrete and construction method thereof | |
| CN102010155A (en) | High-strength plant growing type porous concrete and preparation method thereof | |
| CN109566248B (en) | Method for planting rocky slope vegetation | |
| CN106365536A (en) | Self-compacting expansive concrete | |
| CN108863201B (en) | Heat-preservation and moisture-regain-prevention concrete module for construction and construction method thereof | |
| CN104478320A (en) | Frost-resistant habitat base material for alpine region and preparation method thereof | |
| CN102503312B (en) | Polyvinyl alcohol fiber-reinforced cement stabilized macadam pavement base material | |
| CN107902967B (en) | Anti-crack, adhesive and heat-insulating mortar dry material for yellow river silt construction and preparation method thereof | |
| CN207295704U (en) | A kind of ecology spray anchor protective slope structure | |
| CN107311688B (en) | It is a kind of for porous vegetation concrete of Techniques of Ecological Protection in Expressway Side Slope and preparation method thereof | |
| CN105924052B (en) | A kind of method for preparing anti-freezing type and planting raw eco-concrete | |
| CN106830830A (en) | Plant raw eco-concrete | |
| CN114163192B (en) | Anti-freezing high-ductility composite material and preparation method and application thereof | |
| KR102352110B1 (en) | Cast-in-place type moisturizing porous concrete mixture for plant slopes or revetments using fiber, and its construction method | |
| CN112812780B (en) | Hydrophobic anti-scouring loess curing agent | |
| Dal | Decays Occuring in the Structure in Adobe Materials | |
| CN115094924A (en) | Prefabricated ecological vegetation slope protection brick and preparation method thereof | |
| CN1545837A (en) | Gypsum earth vegetation constructional materials and construction method thereof | |
| CN107500641A (en) | A kind of concrete brick and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |