CN112939508B - Carbide slag-based micro-expanding agent and preparation method thereof - Google Patents
Carbide slag-based micro-expanding agent and preparation method thereof Download PDFInfo
- Publication number
- CN112939508B CN112939508B CN202110191448.6A CN202110191448A CN112939508B CN 112939508 B CN112939508 B CN 112939508B CN 202110191448 A CN202110191448 A CN 202110191448A CN 112939508 B CN112939508 B CN 112939508B
- Authority
- CN
- China
- Prior art keywords
- carbide slag
- parts
- coal gangue
- micro
- percent
- 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
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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a carbide slag-based micro-expanding agent and a preparation method thereof, wherein the micro-expanding agent contains CaO and active Al2O3Calcium sulfate when added to cementIn the base cement, Al is the first2O3Calcium sulfate and CaOH react to generate ettringite with micro expansibility, so that the cementing material has micro expansibility at the early stage; then degrading the polylactic acid coated outside the CaO in an alkaline environment, and reacting the CaO with water to generate CaOH with micro expansibility, so that the cementing material system has more continuous expansibility; polylactic acid is a high molecular polymer, which is degraded in an alkaline environment, plays a role in delaying the hydration of CaO in an expanding agent, sucrose has a function of adjusting the hydration, and a cementing material system has better micro-expansibility under the composite adjusting function of the polylactic acid and the sucrose.
Description
Technical Field
The invention belongs to the field of civil engineering materials, and particularly relates to a carbide slag-based micro-expanding agent and a preparation method thereof.
Background
The existing expanding agents have a plurality of varieties, most of the varieties use ettringite as an expansion source, belong to calcium sulphoaluminate expanding agents, do not have continuous micro-expansibility, adopt high-grade mineral raw materials, have complex production process technology, have higher high-temperature calcination difficulty and the like, and have generally higher production cost.
The carbide slag-based micro-expanding agent has a relatively continuous expansion effect, is used for cement-based cementing materials (including concrete), and can generate micro-expansion and compensate shrinkage in the setting and hardening process.
Disclosure of Invention
The invention aims to provide a carbide slag-based micro-expanding agent and a preparation method thereof, and aims to solve the technical problem that the existing expanding agent does not have relatively continuous expansibility.
In order to solve the technical problems, the specific technical scheme of the invention is as follows:
the carbide slag-based micro-expanding agent comprises the following raw materials in parts by weight:
733 parts of carbide slag, 131 parts of coal gangue, 91 parts of fly ash, 30 parts of desulfurized gypsum, 5 parts of cane sugar and 10 parts of polylactic acid.
Further, the carbide slag, the coal gangue, the fly ash and the desulfurized gypsum pass through a 200-mesh square-hole sieve, and the sieve residue is less than 5%.
Further, the carbide slag is produced in the Ulan scotch city; the coal gangue is high-alumina coal gangue produced in Ordos areas; the fly ash is solid waste produced in Ordos areas; the desulfurized gypsum is solid waste produced by power plants in Ordos areas.
Further, the content of CaO in the carbide slag is 69%, the loss on ignition is 30%, and Al in the coal gangue2O3And SiO2The content is 82 percent, and the ignition loss is 17 percent; the fly ash Al2O3And SiO2The content is 60 percent, and the ignition loss is 35 percent; SO in the desulfurized gypsum3The content is 54 percent; sucrose contains C as main ingredient12H22O11The purity was 99.4%.
CaO, CaSO when expanding agents are added to cement-based materials4、Al2O3SiO2 and CaOH generated by cement hydration, the following chemical reactions occur:
[ reaction formula 1]
CaO+H2O→2CaOH
[ reaction formula 2]
Al2O3+3Ca(OH)2+3CaSO4+29H2O→3(CaO·Al2O3·3CaSO4·32H2O)
The carbide slag mainly provides CaO, which is a main component of an expanding agent, and reacts with water to generate CaOH with expansibility; the coal gangue mainly provides Al2O3After the coal gangue is activated at high temperature, active Al contained in the coal gangue2O3Will react with CaSO4And CaOH reacts to generate expanded ettringite; fly ash mainly provides Al2O3In the hydration process, the calcium aluminate not only can generate ettringite with micro expansibility, but also plays a role in micro aggregate effect in a cementing material and improves the compactness of a cementing material system; the desulfurized gypsum mainly provides CaSO4Can react with Al in alkali excitation process2O3、Ca(OH)2、H2The O reacts to generate expanded ettringite; the sucrose has the main functions of regulating and controlling the hydration speed of the carbide slag and preventing the system from generating micro cracks due to too fast hydration to influence the strength of the system; the polylactic acid mainly plays a role in delaying the hydration time of CaO and preventing the CaOIn the early stage of hydration, a vigorous hydration reaction occurs to generate a large amount of Ca (OH) having swelling properties2。
The preparation method of the carbide slag-based micro-expanding agent comprises the following steps:
(1) the materials for preparing the micro-expansion agent are as follows: 733 parts of carbide slag, 131 parts of coal gangue, 91 parts of fly ash, 30 parts of desulfurized gypsum, 5 parts of cane sugar and 10 parts of polylactic acid.
(2) Material pretreatment: carrying out ball milling on the carbide slag and the coal gangue by using a planetary ball mill, and sieving by using a 200-mesh square-hole sieve, wherein the sieve allowance is less than 5%; sieving the fly ash by a 200-mesh square-hole sieve, wherein the sieve residue is less than 5 percent; the desulfurized gypsum is sieved by a 325-mesh square-hole sieve, and the sieve residue is less than 5 percent; and (3) placing the materials in a forced air drying oven to be dried for 24 hours at the drying temperature of 105 ℃, and sealing and storing for later use.
(3) Calcining carbide slag: and (3) placing the pretreated carbide slag into a high-temperature furnace, heating the furnace to 910 ℃ at the heating rate of 5 ℃/min, calcining at 910 ℃ for 60min, taking out the carbide slag, cooling to room temperature in the air, and sealing and storing to prevent the carbide slag from being affected with damp.
(4) Calcining coal gangue: and (3) placing the pretreated coal gangue in a high-temperature furnace, heating the furnace to 800 ℃ at the heating rate of 5 ℃/min, carrying out heat preservation and calcination for 60min, taking out the coal gangue, cooling the coal gangue to room temperature in the air, and sealing and storing the coal gangue.
(5) Mixing sucrose and water at a ratio of 1:2, and stirring to dissolve sucrose. Then placing the carbide slag into a mixing stirrer, wherein the parameters of the mixing stirrer are as follows: the vessel is phi 120cm, the rotation frequency is 300 times/min, the rotation stroke is 100mm, the vibration frequency is 150 times/min, and the vibration height is 40 mm; after the carbide slag is placed in a mixing stirrer, uniformly spraying a sucrose solution on the carbide slag in a spraying mode, and fully mixing the carbide slag with the sucrose solution to fully wrap the carbide slag with the sucrose solution; and (4) placing the mixed carbide slag into a blast drying oven for drying for later use.
(6) Dissolving polylactic acid in dichloromethane at a ratio of 1: 4; placing the carbide slag wrapped with sugar in a mixing stirrer, wherein the parameters of the stirrer are as follows: the vessel is phi 120cm, the rotation frequency is 300 times/min, the rotation stroke is 100mm, the vibration frequency is 150 times/min, and the vibration height is 40 mm; uniformly spraying a polylactic acid solution on the carbide slag in an atomization mode to fully wrap the carbide slag by the polylactic acid, and removing dichloromethane in vacuum at 50 ℃ by using a rotary evaporation instrument; the prepared carbide slag is stored in a sealed manner to prevent the carbide slag from being affected with damp.
(7) Preparation of the swelling agent: mixing the prepared carbide slag, coal gangue, fly ash and desulfurized gypsum according to the proportion of 733: 131: 91: 30, and then placing the mixed material into a material mixing stirrer for fully mixing to obtain the expanding agent.
The carbide slag-based micro-expanding agent and the preparation method thereof have the following advantages:
(1) has the function of micro-expansion
The invention has better micro-expansibility when being used for cement-based cementing materials (including concrete), and can ensure that the micro-expanding agent has more continuous expansibility in the setting and hardening process of the cement-based cementing materials (including concrete) under the composite regulation and control action of polylactic acid and cane sugar.
(2) Low cost
The main material used in the invention is solid waste, and compared with the traditional expanding agent, the invention has the advantages of easily obtained raw materials, low cost and the like.
(3) Effective utilization of solid wastes
The main materials used by the invention are industrial solid wastes such as carbide slag, coal gangue, fly ash and the like, the solid waste usage ratio can reach 98 percent, the effective utilization of the solid wastes can not only reduce the manufacturing cost of the product, but also effectively solve a series of problems that the industrial solid wastes pollute the atmosphere, soil resources, water resources and the like.
Detailed Description
In order to better understand the present invention, the following describes the carbide slag-based micro-expansion agent and the preparation method thereof in further detail.
1000g of carbide slag-based micro-expanding agent is prepared from the following materials in parts by weight:
733g of carbide slag, 131g of coal gangue, 91g of fly ash, 30g of desulfurized gypsum, 5g of cane sugar and 10g of polylactic acid.
The carbide slag, the coal gangue, the fly ash and the desulfurized gypsum pass through a 200-mesh square-hole sieve, and the sieve residue is less than 5 percent.
The carbide slag is produced in the Wulan Chouibu City; the coal gangue is high-alumina coal gangue produced in Ordos areas; the fly ash is solid waste produced in Ordos areas; the desulfurized gypsum is solid waste produced by power plants in Ordos areas.
The content of CaO in the carbide slag is 69 percent, the loss on ignition is 30 percent, and Al in the coal gangue2O3And SiO2The content is 82 percent, and the ignition loss is 17 percent; the fly ash Al2O3And SiO2The content is 60 percent, and the ignition loss is 35 percent; SO in the desulfurized gypsum3The content is 54 percent; sucrose contains C as main ingredient12H22O11The purity is 99.4%; the molar mass of the polylactic acid is 10000 g.
CaO, CaSO when expanding agents are added to cement-based materials4、Al2O3SiO2 and CaOH generated by cement hydration, the following chemical reactions occur:
[ reaction formula 1]
CaO+H2O→2CaOH
[ reaction formula 2]
Al2O3+3Ca(OH)2+3CaSO4+29H2O→3(CaO·Al2O3·3CaSO4·32H2O)
The carbide slag mainly provides CaO, which is a main component of an expanding agent, and reacts with water to generate CaOH with expansibility; the coal gangue mainly provides Al2O3After the coal gangue is activated at high temperature, active Al contained in the coal gangue2O3Will react with CaSO4And CaOH reacts to generate expanded ettringite; fly ash mainly provides Al2O3In the hydration process, the calcium aluminate not only can generate ettringite with micro expansibility, but also plays a role in micro aggregate effect in a cementing material and improves the compactness of a cementing material system; the desulfurized gypsum mainly provides CaSO4Can react with Al in alkali excitation process2O3、Ca(OH)2、H2The O reacts to generate expanded ettringite; the sucrose has the main functions of regulating and controlling the hydration speed of the carbide slag and preventing the system from generating micro cracks due to too fast hydration to influence the strength of the system; the polylactic acid mainly plays a role in delaying the hydration time of CaO, and preventing the CaO from generating a large amount of expansive Ca (OH) through violent hydration reaction at the initial stage of hydration2。
The preparation method of the carbide slag-based micro-expanding agent comprises the following steps:
(1) the materials for preparing the micro-expansion agent are as follows: 733g of carbide slag, 131g of coal gangue, 91g of fly ash, 30g of desulfurized gypsum, 5g of cane sugar and 10g of polylactic acid.
(2) Material pretreatment: carrying out ball milling on the carbide slag and the coal gangue by using a planetary ball mill, and sieving by using a 200-mesh square-hole sieve, wherein the sieve residue is less than 5%; sieving the fly ash by a 200-mesh square-hole sieve, wherein the sieve residue is less than 5 percent; the desulfurized gypsum is sieved by a 200-mesh square-hole sieve, and the sieve residue is less than 5 percent; and (3) placing the materials in a forced air drying oven to be dried for 24 hours at the drying temperature of 105 ℃, and sealing and storing for later use.
(3) Calcining carbide slag: and (3) placing the pretreated carbide slag into a high-temperature furnace, heating the furnace to 910 ℃ at the heating rate of 5 ℃/min, calcining at 910 ℃ for 60min, taking out the carbide slag, cooling to room temperature in the air, and sealing and storing to prevent the carbide slag from being affected with damp.
(4) Calcining coal gangue: and (3) placing the pretreated coal gangue in a high-temperature furnace, heating the furnace to 800 ℃ at the heating rate of 5 ℃/min, carrying out heat preservation and calcination for 60min, taking out the coal gangue, cooling the coal gangue to room temperature in the air, and sealing and storing the coal gangue.
(5) Mixing sucrose and water at a ratio of 1:2, and stirring to dissolve sucrose. Then placing the carbide slag into a mixing stirrer, wherein the parameters of the mixing stirrer are as follows: the vessel is phi 120cm, the rotation frequency is 300 times/min, the rotation stroke is 100mm, the vibration frequency is 150 times/min, and the vibration height is 40 mm; after the carbide slag is placed in a mixing stirrer, uniformly spraying a sucrose solution on the carbide slag in a spraying mode, and fully mixing the carbide slag with the sucrose solution to fully wrap the carbide slag with the sucrose solution; and (4) placing the mixed carbide slag into a blast drying oven for drying for later use.
(6) Dissolving polylactic acid in dichloromethane at a ratio of 1: 4; placing the carbide slag wrapped with sugar in a mixing stirrer, wherein the parameters of the stirrer are as follows: the vessel is phi 120cm, the rotation frequency is 300 times/min, the rotation stroke is 100mm, the vibration frequency is 150 times/min, and the vibration height is 40 mm; uniformly spraying a polylactic acid solution on the carbide slag in an atomization mode to fully wrap the carbide slag by the polylactic acid, and removing dichloromethane in vacuum at 50 ℃ by using a rotary evaporation instrument; the prepared carbide slag is stored in a sealed manner to prevent the carbide slag from being affected with damp.
(7) Preparation of the swelling agent: mixing the prepared carbide slag, coal gangue, fly ash and desulfurized gypsum according to the proportion of 733: 131: 91: 30, and then placing the mixed material into a material mixing stirrer for fully mixing to obtain the expanding agent.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (2)
1. The carbide slag-based micro-expanding agent is characterized by comprising the following raw materials in parts by weight:
733 parts of carbide slag, 131 parts of coal gangue, 91 parts of fly ash, 30 parts of desulfurized gypsum, 5 parts of cane sugar and 10 parts of polylactic acid;
the preparation method of the carbide slag-based micro-expanding agent comprises the following steps:
(1) the materials for preparing the micro-expansion agent are as follows: 733 parts of carbide slag, 131 parts of coal gangue, 91 parts of fly ash, 30 parts of desulfurized gypsum, 5 parts of cane sugar and 10 parts of polylactic acid;
(2) material pretreatment: carrying out ball milling on the carbide slag and the coal gangue by using a planetary ball mill, and sieving by using a 200-mesh square-hole sieve, wherein the sieve residue is less than 5%; sieving the fly ash by a 200-mesh square-hole sieve, wherein the sieve residue is less than 5 percent; the desulfurized gypsum is sieved by a 200-mesh square-hole sieve, and the sieve residue is less than 5 percent; drying the materials in a forced air drying oven for 24h at 105 ℃, and sealing for later use;
(3) calcining carbide slag: placing the pretreated carbide slag in a high-temperature furnace, heating the furnace to 910 ℃ at the heating rate of 5 ℃/min, calcining at 910 ℃ for 60min, taking out the carbide slag, cooling to room temperature in the air, and sealing for preventing from being affected with damp;
(4) calcining coal gangue: putting the pretreated coal gangue into a high-temperature furnace, heating the furnace to 800 ℃ at a heating rate of 5 ℃/min, carrying out heat preservation and calcination for 60min, taking out the coal gangue, cooling the coal gangue to room temperature in the air, and sealing and storing the coal gangue;
(5) mixing sucrose and water according to the ratio of 1:2, fully stirring to dissolve the sucrose, and then placing carbide slag into a mixing stirrer, wherein the parameters of the mixing stirrer are as follows: the vessel is phi 120cm, the rotation frequency is 300 times/min, the rotation stroke is 100mm, the vibration frequency is 150 times/min, and the vibration height is 40 mm; after the carbide slag is placed in a mixing stirrer, uniformly spraying a sucrose solution on the carbide slag in a spraying mode, and fully mixing the carbide slag with the sucrose solution to fully wrap the carbide slag with the sucrose solution; placing the mixed carbide slag in a blast drying oven for drying for later use;
(6) dissolving polylactic acid in dichloromethane at a ratio of 1: 4; placing the carbide slag wrapped with sugar in a mixing stirrer, wherein the parameters of the stirrer are as follows: the vessel is phi 120cm, the rotation frequency is 300 times/min, the rotation stroke is 100mm, the vibration frequency is 150 times/min, and the vibration height is 40 mm; uniformly spraying a polylactic acid solution on the carbide slag in an atomization mode to fully wrap the carbide slag by the polylactic acid, and removing dichloromethane in vacuum at 50 ℃ by using a rotary evaporation instrument; the prepared carbide slag is stored in a sealing way to prevent from being affected with damp;
(7) preparation of the swelling agent: mixing the prepared carbide slag, coal gangue, fly ash and desulfurized gypsum according to the proportion of 733: 131: 91: 30, and then placing the mixed material into a material mixing stirrer for fully mixing to obtain the expanding agent.
2. The carbide slag-based micro-expanding agent as claimed in claim 1, wherein the content of CaO in the carbide slag is 69%, the loss on ignition is 30%, and Al in the coal gangue is 30%2O3And SiO2The content is 82 percent, and the ignition loss is 17 percent; the fly ash Al2O3And SiO2The content is 60 percent, and the ignition loss is 35 percent; SO in the desulfurized gypsum3The content is 54 percent; the sucrose comprises the main component C12H22O11The purity was 99.4%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110191448.6A CN112939508B (en) | 2021-02-19 | 2021-02-19 | Carbide slag-based micro-expanding agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110191448.6A CN112939508B (en) | 2021-02-19 | 2021-02-19 | Carbide slag-based micro-expanding agent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112939508A CN112939508A (en) | 2021-06-11 |
| CN112939508B true CN112939508B (en) | 2022-05-24 |
Family
ID=76244547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110191448.6A Active CN112939508B (en) | 2021-02-19 | 2021-02-19 | Carbide slag-based micro-expanding agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112939508B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113307595A (en) * | 2021-06-17 | 2021-08-27 | 内蒙古工业大学 | Multi-element solid waste synergy-based geopolymer cementing material for pavement base and preparation method thereof |
| CN117263643A (en) * | 2023-11-21 | 2023-12-22 | 内蒙古工业大学 | Two-stage regulated full-solid waste micro-expansion concrete and preparation method thereof |
| CN117285273B (en) * | 2023-11-27 | 2024-02-02 | 内蒙古工业大学 | Soybean wax coated carbide slag micro-expanding agent and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4076546A (en) * | 1975-12-30 | 1978-02-28 | Centralna Laboratoria Po Physiko-Chimicheska Mechanika Pri Ban | Method for production of expansive cement |
| CN101182143A (en) * | 2007-11-07 | 2008-05-21 | 北京航空航天大学 | Preparation of composite high-expansion cementing material by using industrial slag and preparation technique thereof |
| CN104692691A (en) * | 2015-02-05 | 2015-06-10 | 江苏苏博特新材料股份有限公司 | Modified calcium oxide expansion agent for cement concrete and preparation method of modified calcium oxide expansion agent |
| CN109553334A (en) * | 2019-01-14 | 2019-04-02 | 江苏金海宁新型建材科技有限公司 | A kind of recycled aggregate premixing mortar and preparation method thereof |
-
2021
- 2021-02-19 CN CN202110191448.6A patent/CN112939508B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4076546A (en) * | 1975-12-30 | 1978-02-28 | Centralna Laboratoria Po Physiko-Chimicheska Mechanika Pri Ban | Method for production of expansive cement |
| CN101182143A (en) * | 2007-11-07 | 2008-05-21 | 北京航空航天大学 | Preparation of composite high-expansion cementing material by using industrial slag and preparation technique thereof |
| CN104692691A (en) * | 2015-02-05 | 2015-06-10 | 江苏苏博特新材料股份有限公司 | Modified calcium oxide expansion agent for cement concrete and preparation method of modified calcium oxide expansion agent |
| CN109553334A (en) * | 2019-01-14 | 2019-04-02 | 江苏金海宁新型建材科技有限公司 | A kind of recycled aggregate premixing mortar and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112939508A (en) | 2021-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112939508B (en) | Carbide slag-based micro-expanding agent and preparation method thereof | |
| Chindaprasirt et al. | Utilization of fly ash blends from pulverized coal and fluidized bed combustions in geopolymeric materials | |
| Abo-El-Enein et al. | Physicochemical characteristics of cementitious building materials derived from industrial solid wastes | |
| WO2007107111A1 (en) | Mg-slag brick with high strength and method for preparing the same | |
| CN110372240B (en) | Preparation and use method of normal-temperature-curing low-price alkali-activated cement | |
| US7682448B2 (en) | High compressive strength silica mortar and manufacturing method thereof | |
| EP2514727B1 (en) | An alkali activated limestone concrete composition and use of composition in concrete casting | |
| CN113277759A (en) | Titanium slag-based solid waste cementing material and preparation method thereof | |
| CN112794683B (en) | Waste concrete-based regenerated cementing material and preparation method thereof | |
| CN108455941A (en) | A kind of mining foam filling material of alkaline residue and preparation method thereof | |
| CN116409948A (en) | Low-carbon composite cementing material based on regenerated micro powder, and preparation method and application thereof | |
| CN102167536B (en) | Secondary ettringite type expanding agent and preparation method and application thereof | |
| Jia et al. | Effects of different gypsum varieties on the hydration and mechanical properties of red mud-based ferrite-rich sulfoaluminate cement | |
| Castaldelli et al. | Preliminary studies on the use of sugar cane bagasse ash (SCBA) in the manufacture of alkali activated binders | |
| CN101575180B (en) | Strontium-barium cement calcination composite mineralizer | |
| Huang et al. | Simultaneous utilization of mine tailings and steel slag for producing geopolymers: Alkali-hydrothermal activation, workability, strength, and hydration mechanism | |
| CN108264249B (en) | Ferronickel slag-slag low-hydration-heat cementing material and preparation method thereof | |
| CN102936121A (en) | Composite material used in mine roadway filling | |
| Li et al. | In-depth analysis of macro-properties and micro-mechanism of eco-friendly geopolymer based on typical circulating fluidized bed fly ash | |
| CN102924004A (en) | Production method of dry-mixed mortar | |
| CN117645420A (en) | Carbonation hardening low-calcium cement and preparation and hardening method thereof | |
| CN114956642B (en) | Composite expanding agent based on regenerated micro powder and preparation method thereof | |
| Liu et al. | Synthesis of nanoparticles from slag and their enhancement effect on hydration properties of CaO/CaSO4-activated slag binder | |
| CN115304300A (en) | Activation method of shield muck graded fine mud and preparation method of grouting material | |
| CN115368034A (en) | Self-powdering carbon-cured cementing material prepared by utilizing solid wastes 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 |