CN111892364A - Multi-solid-waste non-fired non-steamed double-layer-structure water permeable brick and preparation method thereof - Google Patents
Multi-solid-waste non-fired non-steamed double-layer-structure water permeable brick and preparation method thereof Download PDFInfo
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- CN111892364A CN111892364A CN202010782222.9A CN202010782222A CN111892364A CN 111892364 A CN111892364 A CN 111892364A CN 202010782222 A CN202010782222 A CN 202010782222A CN 111892364 A CN111892364 A CN 111892364A
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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
- C04B28/08—Slag cements
- C04B28/082—Steelmaking slags; Converter slags
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C5/00—Pavings made of prefabricated single units
- E01C5/06—Pavings made of prefabricated single units made of units with cement or like binders
- E01C5/065—Pavings made of prefabricated single units made of units with cement or like binders characterised by their structure or component materials, e.g. concrete layers of different structure, special additives
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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
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a multi-solid waste non-fired and non-steamed double-layer structure water permeable brick and a preparation method thereof, belonging to the field of building material preparation, wherein the water permeable brick comprises a surface layer and a base layer, and the surface layer comprises the following raw materials in parts by weight: 80-100 parts of steel slag micro powder, 20-30 parts of silica fume, 1-4 parts of epoxy resin, 0.5-2 parts of curing agent, 0.1-0.5 part of water reducing agent and 10-20 parts of water; the base layer comprises, by weight, 10-20 parts of cement, 80-100 parts of iron ore waste stone, 20-30 parts of iron tailing powder, 0.1-0.5 part of water reducing agent and 10-20 parts of water respectively, and the water permeable brick has the advantages of high solid waste utilization rate, realization of resource utilization of solid waste, simple process, no need of high-temperature calcination, low energy consumption, adoption of ultrafine particles for the surface layer and avoidance of blockage inside the water permeable brick due to overlong use time; silica fume is added into the surface layer as an excitant, so that the strength and the wear resistance of the water permeable brick are improved.
Description
Technical Field
The invention relates to a multi-solid waste baking-free steaming-free water permeable brick with a double-layer structure and a preparation method thereof, belonging to the field of preparation of building materials.
Background
With the rapid development of the economy and the vigorous development of the urbanization in China, the original green land is replaced by large-scale ground pavement, and the formed urban desert greatly increases the impervious area, so that the urban rainwater cannot return to the nature, and as a result, the urban underground water is greatly reduced, and the urban building is in danger of sinking; and when the city rainstorm suddenly occurs, the rainwater on the road surface can not be leaked quickly, so that great burden is caused to the urban drainage facilities, and urban waterlogging is easy to develop. Meanwhile, the large-area pavement of the pavement weakens the breathing function of the city, can cause a heat island effect, reduces the comfort level of the city and causes the unbalance of the urban ecological system. The construction of sponge cities is proposed for the country, and the target of constructing 80% of sponge cities in China in 2030 is proposed. The core connotation of sponge city construction is to permeate water and store water, realize city water resource cyclic utilization, solve city raise dust, reduce urban noise, avoid city waterlogging and other series of urban problems. Water permeable materials and water storage materials cannot be separated in sponge city construction, wherein the water permeable brick is one of the most main demand products.
The water permeable bricks can be divided into sintered water permeable bricks and baking-free water permeable bricks in material and production process. The sintered water permeable brick has complex manufacturing process, consumes a large amount of energy by high-temperature sintering, and generates the problem of air pollution, so that the product has higher manufacturing cost and is difficult to meet the actual market requirement. The baking-free water permeable brick also has the obvious defects of rough surface, easy sand falling, and poor strength and timeliness.
Disclosure of Invention
In order to solve the existing problems, the invention provides a multi-solid waste baking-free steaming-free water permeable brick with a double-layer structure and a preparation method thereof, iron ore waste stone, iron tailings and steel slag are used as raw materials, the utilization rate of solid waste is high, and the site resource waste and a series of ecological problems caused by heaven-march stacking are reduced; the forming process is compression forming, the process is simple, high-temperature calcination is not needed, and the energy consumption is low; the surface layer adopts epoxy resin and micro powder to avoid the blockage of the interior of the permeable brick by dust and silt in the using time process, and the added silica fume is used as an exciting agent, so that the activity of the steel slag can be excited, and the strength and the abrasion resistance of the permeable brick are improved.
The technical scheme adopted by the invention is as follows:
the multi-solid-waste non-fired and non-steamed double-layer-structure water permeable brick comprises a surface layer and a base layer, wherein the surface layer comprises the following raw materials in parts by weight: 80-100 parts of steel slag micro powder, 20-30 parts of silica fume, 1-4 parts of epoxy resin, 0.5-2 parts of curing agent, 0.1-0.5 part of water reducing agent and 10-20 parts of water; the base layer raw materials respectively comprise, by weight, 10-20 parts of cement, 80-100 parts of iron ore waste stone, 20-30 parts of iron tailing powder, 0.1-0.5 part of a water reducing agent and 10-20 parts of water.
The surface layer comprises the following raw materials in parts by weight: 100 parts of steel slag micro powder, 20 parts of silica fume, 4 parts of epoxy resin, 2 parts of curing agent, 0.1 part of water reducing agent and 20 parts of water; the base layer raw materials respectively comprise 10 parts of cement, 80 parts of iron ore waste stone, 20 parts of iron tailing powder, 0.5 part of water reducing agent and 10 parts of water according to weight percentage.
The steel slag micro powder comprises the following components in parts by weight: 40-50% of calcium oxide, 5-20% of ferric oxide, 10-20% of silicon dioxide, 7-10% of ferrous oxide, 2-5% of aluminum oxide and 4-10% of magnesium oxide, wherein the steel slag micro powder is 10-20 meshes.
The particle size of the iron ore waste stone is 2-5 mm.
The iron tailing powder comprises the following components in parts by weight: 50-65% of silicon dioxide, 10-15% of ferric oxide, 10-15% of aluminum oxide, 2-6% of calcium oxide, 2-4% of magnesium oxide, 0.1-0.3% of sulfur trioxide, 0.5-1% of potassium oxide and 0.1-0.4% of sodium oxide.
The epoxy resin is 128 type epoxy resin, and the curing agent is a polyurethane curing agent.
The water reducing agent is a sulfamate water reducing agent, and the cement is P.O 42.5 cement.
The thickness of the surface layer is 4-8mm, and the thickness of the base layer is 30-80 mm.
A preparation method of a multi-solid-waste baking-free steaming-free water permeable brick with a double-layer structure is characterized by comprising the following steps: the method comprises the following steps:
(1) respectively and uniformly mixing the urban surface layer raw material and the base layer raw material according to the proportion requirement for 3-5min, and then respectively stirring for 10-15min to obtain green brick raw materials;
(2) placing the mixed surface layer green brick raw materials into a mold and paving, placing the mixed base layer green brick raw materials into the mold and paving, and carrying out static pressure forming under the pressure of 25-30MPa to obtain a water permeable brick green brick;
(3) and (3) curing the water permeable brick green body for 7-28 days under the conditions of temperature of 20-23 ℃ and humidity of 95-99% to obtain a finished water permeable brick.
The invention has the advantages and effects that:
the invention has the advantages that the iron tailings, the iron ore waste stone and the steel slag are selected as raw materials, the utilization rate of solid wastes is high, the additional value of the solid wastes is greatly improved, the resource utilization of the solid wastes is realized, the site resource waste and a series of ecological problems caused by landfill and stacking are reduced, the forming process is compression forming, the process is simple, high-temperature calcination is not needed, the energy consumption is low, the surface layer adopts ultrafine particles, the main cementing material is epoxy resin, the phenomenon that the interior of the water permeable brick is blocked by dust and silt due to overlong use time is avoided, and the silica fume is added into the surface layer as an exciting agent, so that the activity of the steel slag can be excited, and the strength and the wear resistance of.
Detailed Description
The materials, methods and apparatus used in the following examples, which are not specifically illustrated, are conventional in the art and are commercially available to those of ordinary skill in the art.
In the following description of the present invention, "plurality", and "plural" mean two or more unless otherwise specified.
The present invention is described in further detail below, but the following detailed description is not to be construed as limiting the invention.
Example 1
The multi-solid-waste non-fired and non-steamed double-layer-structure water permeable brick comprises a surface layer and a base layer, wherein the thickness of the surface layer is 5 mm. The base layer is 60 mm. The surface layer comprises 100 parts by weight of steel slag micro powder with the particle size of 10-20 meshes, 20 parts by weight of silica fume, 4 parts by weight of 128-type epoxy resin, 2 parts by weight of polyurethane curing agent, 0.1 part by weight of sulfamic acid water reducing agent and 20 parts by weight of water; the base layer raw materials respectively comprise 10 parts of P.O 42.5 cement, 80 parts of iron ore waste stone with the particle size of 2-5mm, 20 parts of iron tailing powder, 0.5 part of sulfamic acid water reducing agent and 10 parts of water in parts by weight. The steel slag micro powder mainly comprises, by weight, 40-50% of calcium oxide, 5-20% of ferric oxide, 10-20% of silicon dioxide, 7-10% of ferrous oxide, 2-5% of aluminum oxide and 4-10% of magnesium oxide. The iron tailing powder comprises the following main chemical components: 50-65% of silicon dioxide, 10-15% of ferric oxide, 10-15% of aluminum oxide, 2-6% of calcium oxide, 2-4% of magnesium oxide, 0.1-0.3% of sulfur trioxide, 0.5-1% of potassium oxide and 0.1-0.4% of sodium oxide.
The preparation method comprises the following steps:
(1) weighing the raw materials of the surface layer and the base layer according to the proportion requirement, respectively mixing uniformly for 5min, and then respectively stirring and mixing for 10min to obtain raw materials of green bricks;
(2) firstly, placing the mixed surface layer green brick raw material into a mould and paving the surface layer green brick raw material, then placing the mixed base layer green brick raw material into the mould, wherein the forming pressure is 25MPa, and carrying out static pressure forming to obtain a permeable brick green brick;
(3) and (3) maintaining the water permeable brick green body for 28 days under the conditions that the temperature is 22 ℃ and the humidity is 95% to obtain a finished water permeable brick.
Example 2
The multi-solid-waste non-fired and non-steamed double-layer-structure water permeable brick comprises a surface layer and a base layer, wherein the thickness of the surface layer is 4 mm. The base layer is 61 mm. The surface layer comprises 85 parts of steel slag micro powder with the particle size of 10-20 meshes, 30 parts of silica fume, 1 part of 128-type epoxy resin, 0.5 part of polyurethane curing agent, 0.5 part of sulfamic acid water reducing agent and 10 parts of water in parts by weight; the base layer raw materials respectively comprise 20 parts of P.O 42.5 cement, 90 parts of iron ore waste stone with the particle size of 2-5mm, 30 parts of iron tailing powder, 0.4 part of sulfamic acid water reducing agent and 15 parts of water in parts by weight. The steel slag micro powder mainly comprises, by weight, 40-50% of calcium oxide, 5-20% of ferric oxide, 10-20% of silicon dioxide, 7-10% of ferrous oxide, 2-5% of aluminum oxide and 4-10% of magnesium oxide. The iron tailing powder comprises the following main chemical components: 50-65% of silicon dioxide, 10-15% of ferric oxide, 10-15% of aluminum oxide, 2-6% of calcium oxide, 2-4% of magnesium oxide, 0.1-0.3% of sulfur trioxide, 0.5-1% of potassium oxide and 0.1-0.4% of sodium oxide.
The preparation method comprises the following steps:
(1) weighing the raw materials of the surface layer and the base layer according to the proportion requirement, respectively mixing uniformly for 3min, and then respectively stirring and mixing for 15min to obtain raw materials of green bricks;
(2) firstly, placing the mixed surface layer green brick raw material into a mould and paving the surface layer green brick raw material, then placing the mixed base layer green brick raw material into the mould, wherein the forming pressure is 30MPa, and carrying out static pressure forming to obtain a permeable brick green brick;
(3) and (3) maintaining the water permeable brick green body for 28 days under the conditions that the temperature is 20 ℃ and the humidity is 98% to obtain a finished water permeable brick.
Example 3
The multi-solid-waste non-fired and non-steamed double-layer-structure water permeable brick comprises a surface layer and a base layer, wherein the thickness of the surface layer is 6 mm. The base layer is 59 mm. The surface layer comprises 90 parts by weight of steel slag micro powder with the particle size of 10-20 meshes, 25 parts by weight of silica fume, 3 parts by weight of 128-type epoxy resin, 1 part by weight of polyurethane curing agent, 0.2 part by weight of sulfamic acid water reducing agent and 15 parts by weight of water; the base layer raw materials respectively comprise 15 parts by weight of P & O42.5 cement, 85 parts by weight of iron ore waste stone with the particle size of 2-5mm, 25 parts by weight of iron tailing powder, 0.3 part by weight of sulfamic acid water reducing agent and 15 parts by weight of water. The steel slag micro powder mainly comprises, by weight, 40-50% of calcium oxide, 5-20% of ferric oxide, 10-20% of silicon dioxide, 7-10% of ferrous oxide, 2-5% of aluminum oxide and 4-10% of magnesium oxide. The iron tailing powder comprises the following main chemical components: 50-65% of silicon dioxide, 10-15% of ferric oxide, 10-15% of aluminum oxide, 2-6% of calcium oxide, 2-4% of magnesium oxide, 0.1-0.3% of sulfur trioxide, 0.5-1% of potassium oxide and 0.1-0.4% of sodium oxide.
The preparation method comprises the following steps:
(1) weighing the raw materials of the surface layer and the base layer according to the proportion requirement, respectively mixing uniformly for 4min, and then respectively stirring and mixing for 10min to obtain raw materials of green bricks;
(2) firstly, placing the mixed surface layer green brick raw material into a mould and paving the surface layer green brick raw material, then placing the mixed base layer green brick raw material into the mould, wherein the forming pressure is 28MPa, and carrying out static pressure forming to obtain a permeable brick green brick;
(3) and (3) maintaining the water permeable brick green body for 28 days under the conditions that the temperature is 22 ℃ and the humidity is 98% to obtain a finished water permeable brick. Example 4
The multi-solid-waste non-fired and non-steamed double-layer-structure water permeable brick comprises a surface layer and a base layer, wherein the thickness of the surface layer is 8 mm. The base layer is 57 mm. The surface layer comprises 80 parts of 10-20 mesh steel slag micro powder, 30 parts of silica fume, 1 part of 128 type epoxy resin, 0.5 part of polyurethane curing agent, 0.5 part of sulfamic acid water reducing agent and 10 parts of water in parts by weight; the base layer raw materials respectively comprise 20 parts of P.O 42.5 cement, 100 parts of iron ore waste stone with the particle size of 2-5mm, 30 parts of iron tailing powder, 0.1 part of sulfamic acid water reducing agent and 20 parts of water in parts by weight. The steel slag micro powder mainly comprises, by weight, 40-50% of calcium oxide, 5-20% of ferric oxide, 10-20% of silicon dioxide, 7-10% of ferrous oxide, 2-5% of aluminum oxide and 4-10% of magnesium oxide. The iron tailing powder comprises the following main chemical components: 50-65% of silicon dioxide, 10-15% of ferric oxide, 10-15% of aluminum oxide, 2-6% of calcium oxide, 2-4% of magnesium oxide, 0.1-0.3% of sulfur trioxide, 0.5-1% of potassium oxide and 0.1-0.4% of sodium oxide.
The preparation method comprises the following steps:
(1) weighing the raw materials of the surface layer and the base layer according to the proportion requirement, respectively mixing uniformly for 5min, and then respectively stirring and mixing for 12min to obtain raw materials of green bricks;
(2) firstly, placing the mixed surface layer green brick raw material into a mould and paving the surface layer green brick raw material, then placing the mixed base layer green brick raw material into the mould, wherein the forming pressure is 30MPa, and carrying out static pressure forming to obtain a permeable brick green brick;
(3) and (3) maintaining the water permeable brick green body for 28 days under the conditions that the temperature is 20 ℃ and the humidity is 95% to obtain a finished water permeable brick.
The performance indexes of the water permeable brick are as follows:
as can be seen from the above table, example 1 is the best mode.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. The utility model provides a what give up useless baking-free steamed bilayer structure that admits water of many solid brick which characterized in that: the permeable brick comprises a surface layer and a base layer, wherein the surface layer comprises the following raw materials in parts by weight: 80-100 parts of steel slag micro powder, 20-30 parts of silica fume, 1-4 parts of epoxy resin, 0.5-2 parts of curing agent, 0.1-0.5 part of water reducing agent and 10-20 parts of water; the base layer raw materials respectively comprise, by weight, 10-20 parts of cement, 80-100 parts of iron ore waste stone, 20-30 parts of iron tailing powder, 0.1-0.5 part of a water reducing agent and 10-20 parts of water.
2. The multi-solid waste baking-free steaming-free water permeable brick with the double-layer structure according to claim 1, which is characterized in that: the surface layer comprises the following raw materials in parts by weight: 100 parts of steel slag micro powder, 20 parts of silica fume, 4 parts of epoxy resin, 2 parts of curing agent, 0.1 part of water reducing agent and 20 parts of water; the base layer raw materials respectively comprise 10 parts of cement, 80 parts of iron ore waste stone, 20 parts of iron tailing powder, 0.5 part of water reducing agent and 10 parts of water according to weight percentage.
3. The multi-solid waste baking-free steaming-free water permeable brick with the double-layer structure according to claim 1, which is characterized in that: the steel slag micro powder comprises the following components in parts by weight: 40-50% of calcium oxide, 5-20% of ferric oxide, 10-20% of silicon dioxide, 7-10% of ferrous oxide, 2-5% of aluminum oxide and 4-10% of magnesium oxide, wherein the steel slag micro powder is 10-20 meshes.
4. The multi-solid waste baking-free steaming-free water permeable brick with the double-layer structure according to claim 1, which is characterized in that: the particle size of the iron ore waste stone is 2-5 mm.
5. The multi-solid waste baking-free steaming-free water permeable brick with the double-layer structure according to claim 1, which is characterized in that: the iron tailing powder comprises the following components in parts by weight: 50-65% of silicon dioxide, 10-15% of ferric oxide, 10-15% of aluminum oxide, 2-6% of calcium oxide, 2-4% of magnesium oxide, 0.1-0.3% of sulfur trioxide, 0.5-1% of potassium oxide and 0.1-0.4% of sodium oxide.
6. The multi-solid waste baking-free steaming-free water permeable brick with the double-layer structure according to claim 1, which is characterized in that: the epoxy resin is 128 type epoxy resin, and the curing agent is a polyurethane curing agent.
7. The multi-solid waste baking-free steaming-free water permeable brick with the double-layer structure according to claim 1, which is characterized in that: the water reducing agent is a sulfamate water reducing agent, and the cement is P.O 42.5 cement.
8. The multi-solid waste baking-free steaming-free water permeable brick with the double-layer structure according to claim 1, which is characterized in that: the thickness of the surface layer is 4-8mm, and the thickness of the base layer is 30-80 mm.
9. The preparation method of the multi-solid waste baking-free steaming-free water permeable brick with the double-layer structure as claimed in claim 1, characterized by comprising the following steps: the method comprises the following steps:
respectively and uniformly mixing the urban surface layer raw material and the base layer raw material according to the proportion requirement for 3-5min, and then respectively stirring for 10-15min to obtain green brick raw materials;
placing the mixed surface layer green brick raw materials into a mold and paving, placing the mixed base layer green brick raw materials into the mold and paving, and carrying out static pressure forming under the pressure of 25-30MPa to obtain a water permeable brick green brick;
and (3) curing the water permeable brick green body for 7-28 days under the conditions of temperature of 20-23 ℃ and humidity of 95-99% to obtain a finished water permeable brick.
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| CN112723840A (en) * | 2020-12-31 | 2021-04-30 | 山东大学 | Coal gangue and iron tailing synergistic baking-free water permeable brick and preparation method thereof |
| CN112851208A (en) * | 2021-01-13 | 2021-05-28 | 山西大学 | Solid waste based inorganic artificial stone and preparation method thereof |
| CN115321935A (en) * | 2022-09-09 | 2022-11-11 | 江西省建材科研设计院有限公司 | Lithium slag-based anti-blocking ecological water permeable brick and preparation method thereof |
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