LU500812B1 - Preparation method of ecological pervious concrete of bank protection material for coastal wetlands - Google Patents
Preparation method of ecological pervious concrete of bank protection material for coastal wetlands Download PDFInfo
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- LU500812B1 LU500812B1 LU500812A LU500812A LU500812B1 LU 500812 B1 LU500812 B1 LU 500812B1 LU 500812 A LU500812 A LU 500812A LU 500812 A LU500812 A LU 500812A LU 500812 B1 LU500812 B1 LU 500812B1
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- waste glass
- black rice
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2015—Sulfate resistance
-
- 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
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- 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
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
- Revetment (AREA)
Abstract
The present invention discloses a preparation method of ecological pervious concrete of bank protection material for coastal wetlands based on waste glass fragments and a composite cementing material, agricultural solid wastes that are black rice hull ash are used for partially replacing cement to serve as a main cementing material, and industrial solid wastes that are fly ash, steel slag powder and other active blending ingredients are doped to serve as auxiliary cementing materials, so that the composite cementing material is prepared. After the waste glass is crushed and screened, the composite cementing material is mixed with recycled concrete aggregate to replace a natural aggregate mineral admixture. The concrete prepared by the present invention has good porosity, good water permeability, and good compressive strength, can be used as the coastal wetland revetment material, and plays a positive role in ecological protection and restoration of coastal wetlands.
Description
DESCRIPTION HUS00812
[0001] The present invention relates to the fields of ecological environment, ecological restoration engineering and building materials, and particularly relates to a preparation method of ecological pervious concrete of bank protection material for coastal wetlands, namely ecological pervious concrete based on waste glass fragments and a composite cementing material.
[0002] The coastal zone is the transition zone between aquatic ecosystems and terrestrial ecosystems, and it is also the only channel for surface runoff to enter rivers. In recent years, due to the discharge of production and domestic sewage, the ecological environment of coastal wetlands has gradually been damaged to varying degrees, and estuary bank revetment has become an important topics in the field of environment protection and ecological restoration. Large-scaled human structures on the earth's surface interfere with the natural water cycle, and hardened revetment materials have severely hindered the hydrological and biological connectivity between the wetland system and the ocean, which led to the gradual decline of coastlines, the accumulation of harmful elements, and the reduction of biodiversity, especially in fragile coastal wetlands. The traditional revetment structure blocks the water communication between the bank and the river, and significantly affects the living strategies of amphibians and the movement of microorganisms in the water. Therefore, there is an urgent need for a material with good mechanical and ecological properties to meet the requirements for ecological revetment and restoration of wetlands.
[0003] The impermeable cement in the revetment wall will interfere with the hydrological cycle of the earth and hinder the materials exchange between the ocean and the land. Ecological permeable concrete (EPC) is a material with HUS00812 strong potential and can be used for ecological revetment, it is developed based on permeable concrete. The EPC has a complex porous structure, has a compressive strength of 10-15 MPa, a porosity of 20-35%, and a pore size range of 5-10 mm, which provides a channel for precipitation and runoff to enter the underground channel, thereby generating infiltration and connectivity functions such as water storage and also can provide an ideal space for plant growth and animal life, thereby creating biological connectivity. The use of EPC in combination with nutrients and plants has strong advantages in the ecological revetment and restoration of coastal wetlands. As a hard material, it has higher stability than traditional masonry cages and wooden poles, can effectively protect the bank and slope from the scouring of huge waves. The EPC underwater can be subjected to decomposition of nitrogen and phosphorus due to precipitation, filtration, absorption and the action of a variety of microorganisms, which is conducive to the purification of water bodies.
[0004] The EPC is usually made of cementing materials, interstitial graded aggregates, admixtures, water and other materials using molds, unlike traditional concrete materials, EPC materials do not contain fine aggregates and use a smaller amount of cementing material to fill the voids between the aggregate particles so as to form a porous structure. In addition, EPC materials have relatively low requirements for compressive strength, which provides an opportunity to reuse waste materials in the production of EPC materials. In the prior art, most of the cementing materials used are ordinary cement, and most of the aggregates are natural aggregates, at the same time, there are more interconnected pores in the permeable concrete, so that the strength and durability of the concrete also have many shortcomings, causing many restrictions in actual use. Therefore, designing and improving the preparation method of ecological permeable concrete is an urgent problem to be solved.
[0005] One of the objectives of the present invention is to design and HUS00812 develop a sustainable EPC material to replace natural aggregates, save natural resources, and alleviate the pressure of solid waste and construction waste landfilling on urban areas; the other objective of the present invention is to design an ecological concrete material capable of effectively improving water permeability and corrosion resistance, and it can be better used as a revetment material for coastal wetlands.
[0006] In order to overcome the defects in the prior art, the present invention provides a preparation method of ecological pervious concrete based on waste glass fragments and a composite cementing material, agricultural solid wastes that are black rice hull ash are used for partially replacing cement to serve as a main cementing material, and industrial solid wastes that are fly ash, steel slag powder and other active blending ingredients are doped to serve as auxiliary cementing materials, so that the composite cementing material is prepared. After the waste glass is crushed and screened, the composite cementing material is mixed with recycled concrete aggregate to replace a natural aggregate mineral admixture, thus the strength and durability of the pervious concrete can be improved within a certain mixing amount range, the fly ash, the waste glass fragments and other industrial solid wastes are greatly used, so that the use of common natural aggregate and cement clinker can be reduced, resources are saved, the environment is protected, the requirement for ecological protection of coastal wetlands can be better met, biological connectivity is facilitated, and remarkable social and economic benefits and application prospects are achieved.
[0007] The present invention provides a preparation method of ecological pervious concrete of bank protection material for coastal wetlands based on the waste glass fragments and the composite cementing material.
[0008] The ecological pervious concrete of bank protection material for coastal wetlands based on the waste glass fragments and the composite HUS00812 cementing material is prepared from the following materials in parts by weight: 150-300 parts of cement, 80-120 parts of an active mineral admixture, 90-150 parts of water, and 1150-1500 parts of waste glass fragment aggregate.
[0009] The preparation method specifically comprises the following steps:
[0010] 1) selecting cement and black rice hull ash as main cementing materials, screening the black rice hull ash through a 150 um sieve before grinding to ensure the uniformity of the strength of the black rice hull ash, then grinding for different times to obtain nano-sized black rice hull ash;
[0011] 2) adding the active mineral admixture as an auxiliary material into the cementing materials in step 1) to obtain the composite cementing material;
[0012] 3) mixing the aggregate with water, and stirring to obtain the recycled aggregate;
[0013] 4) mixing the composite cementing material with water, stirring until the cementing material is uniformly attached to the surface of the recycled aggregate so as to obtain the ecological pervious concrete based on the waste glass fragments and the composite cementing material; and
[0014] 5) pouring the ecological pervious concrete prepared in step 4) into a mold, demolding, and finally solidifying in a steam chamber.
[0015] In step 1), the cement is ASTM | type ordinary portland cement.
[0016] In step 1), the dosage of the black rice hull ash is 10-90% of the weight of the main cementing materials.
[0017] In step 2), the active mineral admixture is prepared by mixing fly ash and steel slag powder, and the particle size of the active mineral admixture is 5-10 mm.
[0018] In step 2), the doping amount of the active mineral admixture is 20-50% of the weight of the composite cementing material.
[0019] In step 3), the recycled aggregate is composed of recycled concrete and ground waste glass fragments.
[0020] In step 3), the mass ratio of the waste glass fragments in the aggregate to the recycled concrete is 1:1-1:5. HUS00812
[0021] In step 3), the particle size of the waste glass fragments is 2.36-5 mm, and the particle size of the recycled concrete is 5-10 mm.
[0022] In step 4), the mass ratio of the water to the composite cementing material is 0.1:1-0.5:1.
[0023] In step 4), the mass ratio of the recycled aggregate to the composite cementing material is 5:1-1:1; and
[0024] In step 5), the temperature of the steam chamber ranges from 20 to 80 DEG C.
[0025] The principle of the preparation method is that calcium hydroxide generated after hydration of fly ash and cement can enhance the strength of the material, the added active mineral admixture can improve the fluidity of the cementing material and slow down the hydration effect of the cementing material, so that the cementing material can more uniformly cover the aggregate, meanwhile, the black rice hull ash has a larger volume relative to portland cement due to the smaller density, and when the black rice hull ash partially replaces the cement, the cementing material has a larger thickness in an interface transition area of the water-permeable concrete, which is beneficial to improving the compressive strength of the ecological water-permeable concrete.
[0026] The preparation method has the beneficial effects that the prepared material keeps good porosity (larger than 20%), the water permeability (the water permeability coefficient is larger than 0.5mm/s) and the compressive strength (not lower than 20 MPa) , and the durability of mortar and the sulfate corrosion resistance of the prepared concrete are enhanced; the prepared concrete adopts the recycled material, so that the recycling of resources is realized, and the preparation method conforms to the environmental protection policy and the sustainable development characteristic; and the ecological water-permeable concrete can be used as the coastal wetland revetment material, is beneficial to biological connectivity, and plays a positive role in ecological protection and restoration of coastal wetlands. HUS00812
[0027] Embodiment 1
[0028] Ecological pervious concrete of bank protection material for coastal wetlands based on waste glass fragments and a composite cementing material is prepared from the following materials in parts by weight: 150 parts of a main cementing material, 40 parts of fly ash, 40 parts of steel slag powder, 90 parts of water, and 1150 parts of aggregate. A specific preparation method comprises the following steps:
[0029] 1. selecting ASTM | type ordinary portland cement and black rice hull ash as the main cementing material, wherein the dosage of the black rice hull ash is 10wt% of the weight of the main cementing materials; screening the black rice hull ash through a 150 um sieve before grinding to ensure the uniformity of the strength of the black rice hull ash, then grinding for 10min to obtain nano-sized black rice hull ash;
[0030] 2. mixing the fly ash with the particle size of 56mm and the steel slag powder with the particle size of 5mm to obtain an active mineral admixture, and adding the active mineral admixture into the cementing material in step 1 to obtain the composite cementing material, wherein the active mineral admixture accounts for 20wt% of the composite cementing material;
[0031] 3. mixing recycled concrete aggregate with the particle size of 5mm and the ground waste glass fragments with the particle size of 2.36mm according to the equal mass ratio, then adding water, and stirring for 10s;
[0032] 4. mixing the water with the composite cementing material obtained in step 2 according to the mass ratio of 0.1:1, stirring until the cementing material uniformly covers the surface of the recycled aggregate so as to obtain the ecological pervious concrete based on the waste glass fragments and the composite cementing material; and
[0033] 5. pouring the ecological pervious concrete into a mold, then demolding, and finally solidifying in a steam chamber at the temperature of 20 HUS00812 DEG C for 7 days.
[0034] Then, the performance test is carried out on the concrete, and the test result shows that the compressive strength of the concrete is 20.4 MPa, the water permeability coefficient is 0.56mm/s, the porosity is 23%, the mass loss rate after 100 times of freeze-thaw cycles is 8%, the durability and the sulfate corrosion resistance are good, the hydrological compatibility and the biological connectivity are good, and the concrete can be better used as a coastal wetland revetment material.
[0035] Embodiment 2
[0036] Ecological pervious concrete of bank protection material for coastal wetlands based on waste glass fragments and a composite cementing material is prepared from the following materials in parts by weight: 200 parts of a main cementing material, 40 parts of fly ash, 45 parts of steel slag powder, 100 parts of water, and 1200 parts of aggregate. A specific preparation method comprises the following steps:
[0037] 1. selecting ASTM | type ordinary portland cement and black rice hull ash as the main cementing material, wherein the dosage of the black rice hull ash is 40wt% of the weight of the main cementing materials; screening the black rice hull ash through a 150 um sieve before grinding to ensure the uniformity of the strength of the black rice hull ash, then grinding for 20min to obtain nano-sized black rice hull ash;
[0038] 2. mixing the fly ash with the particle size of 56mm and the steel slag powder with the particle size of 5mm to obtain an active mineral admixture, and adding the active mineral admixture into the cementing material in step 1 to obtain the composite cementing material, wherein the active mineral admixture accounts for 30wt% of the composite cementing material;
[0039] 3. mixing recycled concrete aggregate with the particle size of 5mm and the ground waste glass fragments with the particle size of 3.5mm according to the equal mass ratio, then adding water, and stirring for 30s;
[0040] 4. mixing the water with the composite cementing material obtained HUS00812 in step 2 according to the mass ratio of 0.25:1, stirring until the cementing material uniformly covers the surface of the recycled aggregate so as to obtain the ecological pervious concrete based on the waste glass fragments and the composite cementing material; and
[0041] 5. pouring the ecological pervious concrete into a mold, then demolding, and finally solidifying in a steam chamber at the temperature of 30 DEG C for 7 days.
[0042] Then, the performance test is carried out on the concrete, and the test result shows that the compressive strength of the concrete is 21.8 MPa, the water permeability coefficient is 0.62mm/s, the porosity is 26%, the mass loss rate after 100 times of freeze-thaw cycles is 9%, the durability and the sulfate corrosion resistance are good, the hydrological compatibility and the biological connectivity are good, and the concrete can be better used as a coastal wetland revetment material.
[0043] Embodiment 3
[0044] Ecological pervious concrete of bank protection material for coastal wetlands based on waste glass fragments and a composite cementing material is prepared from the following materials in parts by weight: 240 parts of a main cementing material, 50 parts of fly ash, 50 parts of steel slag powder, 100 parts of water, and 1350 parts of aggregate. A specific preparation method comprises the following steps:
[0045] 1. selecting ASTM | type ordinary Portland cement and black rice hull ash as the main cementing material, wherein the dosage of the black rice hull ash is 50wt% of the weight of the main cementing materials; screening the black rice hull ash before grinding to ensure the uniformity of the strength of the black rice hull ash, then taking out the black rice hull ash passing through a 150 um sieve, and grinding for 30min to obtain nano-sized black rice hull ash;
[0046] 2. mixing the fly ash with the particle size of 56mm and the steel slag powder with the particle size of 5mm to obtain an active mineral admixture, HUS00812 and adding the active mineral admixture into the cementing material in step 1 to obtain the composite cementing material, wherein the active mineral admixture accounts for 30wt%:
[0047] 3. mixing recycled concrete aggregate with the particle size of 5mm and the ground waste glass fragments with the particle size of 3.5mm according to the equal mass ratio, then adding water, and stirring for 60s;
[0048] 4. mixing the water with the composite cementing material obtained in step 2 according to the mass ratio of 0.34:1, stirring until the cementing material uniformly covers the surface of the recycled aggregate so as to obtain the ecological pervious concrete based on the waste glass fragments and the composite cementing material, and
[0049] 5. pouring the ecological pervious concrete into a mold, then demolding, and finally solidifying in a steam chamber at the temperature of 50 DEG C for 7 days.
[0050] Then, the performance test is carried out on the concrete, and the test result shows that the compressive strength of the concrete is 23.4 MPa, the water permeability coefficient is 0.75mm/s, the porosity is 28%, the mass loss rate after 100 times of freeze-thaw cycles is 9%, the durability and the sulfate corrosion resistance are good, the hydrological compatibility and the biological connectivity are good, and the concrete can be better used as a coastal wetland revetment material.
[0051] Embodiment 4
[0052] Ecological pervious concrete of bank protection material for coastal wetlands based on waste glass fragments and a composite cementing material is prepared from the following materials in parts by weight: 280 parts of a main cementing material, 55 parts of fly ash, 50 parts of steel slag powder, 120 parts of water, and 1400 parts of aggregate. A specific preparation method comprises the following steps:
[0053] 1. selecting ASTM | type ordinary Portland cement and black rice hull ash as the main cementing material, wherein the dosage of the black rice hull HUS00812 ash is 70wt% of the weight of the main cementing materials; screening the black rice hull ash through a 150 um sieve before grinding to ensure the uniformity of the strength of the black rice hull ash, then grinding for 50min to obtain nano-sized black rice hull ash;
[0054] 2. mixing the fly ash with the particle size of 56mm and the steel slag powder with the particle size of 5mm to obtain an active mineral admixture, and adding the active mineral admixture into the cementing material in step 1 to obtain the composite cementing material, wherein the active mineral admixture accounts for 45wt% of the composite cementing material;
[0055] 3. mixing recycled concrete aggregate with the particle size of 5mm and the ground waste glass fragments with the particle size of 3.5mm according to the equal mass ratio, then adding water, and stirring for 30s;
[0056] 4. mixing the water with the composite cementing material obtained in step 2 according to the mass ratio of 0.4:1, stirring until the cementing material uniformly covers the surface of the recycled aggregate so as to obtain the ecological pervious concrete based on the waste glass fragments and the composite cementing material; and
[0057] 5. pouring the ecological pervious concrete into a mold, then demolding, and finally solidifying in a steam chamber at the temperature of 60 DEG C for 7 days.
[0058] Then, the performance test is carried out on the concrete, and the test result shows that the compressive strength of the concrete is 22.5 MPa, the water permeability coefficient is 0.58mm/s, the porosity is 24%, the mass loss rate after 100 times of freeze-thaw cycles is 9%, the durability and the sulfate corrosion resistance are good, the hydrological compatibility and the biological connectivity are good, and the concrete can be better used as a coastal wetland revetment material.
[0059] Embodiment 5
[0060] Ecological pervious concrete of bank protection material for coastal wetlands based on waste glass fragments and a composite cementing HUS00812 material is prepared from the following materials in parts by weight: 300 parts of a main cementing material, 60 parts of fly ash, 60 parts of steel slag powder, 150 parts of water, and 1500 parts of aggregate. A specific preparation method comprises the following steps:
[0061] 1. selecting ASTM | type ordinary Portland cement and black rice hull ash as the main cementing material, wherein the dosage of the black rice hull ash is 90wt% of the weight of the main cementing materials; screening the black rice hull ash through a 150 um sieve before grinding to ensure the uniformity of the strength of the black rice hull ash, then grinding for 60min to obtain nano-sized black rice hull ash;
[0062] 2. mixing the fly ash with the particle size of 56mm and the steel slag powder with the particle size of 5mm to obtain an active mineral admixture, and adding the active mineral admixture into the cementing material in step 1 to obtain the composite cementing material, wherein the active mineral admixture accounts for 50wt% of the composite cementing material;
[0063] 3. mixing recycled concrete aggregate with the particle size of 7mm and the ground waste glass fragments with the particle size of 5mm according to the equal mass ratio, then adding water, and stirring for 60s;
[0064] 4. mixing the water with the composite cementing material obtained in step 2 according to the mass ratio of 0.5:1, stirring until the cementing material uniformly covers the surface of the recycled aggregate so as to obtain the ecological pervious concrete based on the waste glass fragments and the composite cementing material; and
[0065] 5. pouring the ecological pervious concrete into a mold, then demolding, and finally solidifying in a steam chamber at the temperature of 80 DEG C for 7 days.
[0066] Then, the performance test is carried out on the concrete, and the test result shows that the compressive strength of the concrete is 21.6 MPa, the water permeability coefficient is 0.63mm/s, the porosity is 24%, the mass loss rate after 100 times of freeze-thaw cycles is 7%, the durability and the HUS00812 sulfate corrosion resistance are good, the hydrological compatibility and the biological connectivity are good, and the concrete can be better used as a coastal wetland revetment material.
[0067] The technical solutions disclosed and proposed by the present invention can be realized by those skilled in the art by referring to the content of this article and appropriately changing the conditions and routes. Although the method and preparation technology of the present invention have been described through preferred embodiments, the relevant technical personnel can obviously without departing from the content, spirit and scope of the present invention, the methods and technical routes described herein are modified or recombined to realize the final preparation technology. In particular, it should be pointed out that all similar replacements and modifications are obvious to those skilled in the art, and they are all deemed to be included in the spirit, scope and content of the present invention. Matters not covered in the present invention belong to well-known technologies.
Claims (10)
1. A preparation method of ecological pervious concrete of bank protection material for coastal wetlands based on waste glass fragments and a composite cementing material, characterized in that the ecological previous concrete is prepared by compositing the following materials in parts by weight: 150-300 parts of cement, 80-120 parts of an active mineral admixture, 90-150 parts of water, and 1150-1500 parts of waste glass fragment aggregate; the preparation method specifically comprises the following steps: 1) selecting cement and black rice hull ash as main cementing materials, screening the black rice hull ash through a 150 um sieve before grinding to ensure the uniformity of the strength of the black rice hull ash, then grinding for different times to obtain nano-sized black rice hull ash; 2) adding the active mineral admixture as an auxiliary material into the cementing materials in step 1) to obtain the composite cementing material; 3) mixing the aggregate with water, and stirring to obtain a recycled aggregate; 4) mixing the composite cementing material with water, stirring until the cementing material is uniformly attached to the surface of the recycled aggregate to obtain the ecological pervious concrete based on the waste glass fragments and the composite cementing material; and 5) pouring the ecological pervious concrete prepared in step 4) into a mold, demolding, and finally solidifying in a steam chamber.
2. The method according to claim 1, characterized in that in step 1), the cement is ASTM | type ordinary portland cement.
3. The method according to claim 1, characterized in that in step 1), the dosage of the black rice hull ash is 10-90% of the weight of the main cementing materials.
4. The method according to claim 1, characterized in that in step 2), the active mineral admixture is prepared by mixing fly ash and steel slag powder, and the particle size of the active mineral admixture is 5-10 mm. HUS00812
5. The method according to claim 1, characterized in that in step 2), the doping amount of the active mineral admixture is 20-50% of the weight of the composite cementing material.
6. The method according to claim 1, characterized in that in step 3), the recycled aggregate is composed of recycled concrete and ground waste glass fragments.
7. The method according to claim 1, characterized in that in step 3), the mass ratio of the waste glass fragments to the recycled concrete is 1:1-1:5.
8. The method according to claim 1, characterized in that in step 3), the particle size of the waste glass fragments is 2.36-5mm, and the particle size of the recycled concrete is 5-10 mm.
9. The method according to claim 1, characterized in that in step 4), the mass ratio of the water to the composite cementing material is 0.1:1-0.5:1.
10. The method according to claim 1, characterized in that in step 4), the mass ratio of the recycled aggregate to the composite cementing material is 5:1-1:1.
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