CN111689700B - Waste-utilizing environment-friendly high-early-strength fast-hardening cementing material and preparation method thereof - Google Patents
Waste-utilizing environment-friendly high-early-strength fast-hardening cementing material and preparation method thereof Download PDFInfo
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- CN111689700B CN111689700B CN202010566673.9A CN202010566673A CN111689700B CN 111689700 B CN111689700 B CN 111689700B CN 202010566673 A CN202010566673 A CN 202010566673A CN 111689700 B CN111689700 B CN 111689700B
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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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
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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
- 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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention provides a waste-utilizing environment-friendly high-early-strength fast-hardening binding material which comprises the following components in parts by mass: 40-80 parts of refining slag of an air quenching LF furnace, 10-40 parts of gypsum, 5-15 parts of carbonate, 4-15 parts of nitrate and 0.1-1 part of an additive. The preparation method comprises the following steps: firstly, uniformly mixing the prepared refining slag of the air quenching LF furnace with gypsum, carbonate and nitrate according to the mass ratio or parts; then, uniformly spraying the prepared admixture on the solid material according to the mass proportion or parts; and finally, grinding the materials in a ball mill to micropowder with the specific surface area of 400 +/-10 m2/kg, thus obtaining the high early strength and quick hardening cementing material. The invention effectively utilizes the byproducts of steel smelting, phosphate fertilizer production and the like, and promotes the high value-added utilization of the byproducts; the material has low cost, excellent high early strength performance and overcomes the defect of poor later performance of the common early-strength quick-hardening cement-based material; the method has wide popularization and application prospect in special projects such as rush repair, rush construction project, low-temperature construction project and prefabricated parts.
Description
Technical Field
The invention relates to the field of industrial solid waste resource utilization and building materials, in particular to a waste-utilizing environment-friendly high-early-strength fast-hardening cementing material and a preparation method thereof.
Background
The cement concrete material is used as a building engineering material with the largest current consumption, the widest application range and the most economical efficiency, and makes irreplaceable contribution to the development of the human society. Meanwhile, in order to meet the requirements of various engineering constructions, different types of cement or cementing materials are developed at home and abroad in succession. The quick hardening cementing materials such as sulphoaluminate cement, aluminate cement, ferro-aluminate cement and the like have the advantages of quick setting and hardening, high strength and stability, belong to special cement with quick hardening and high strength, and are products which are very needed by projects such as rush repairs, rush construction projects, military projects, ocean projects, low-temperature construction projects, underground projects, prefabricated parts and the like.
However, due to the influence of the distribution of resources such as bauxite, the distribution of sulphoaluminate cement, aluminate cement and ferroaluminate cement plants in China is not wide (only distributed in individual provinces), which results in high transportation cost and high priceThe price is high, and the wide-range popularization and application of the product are limited. Meanwhile, a large amount of non-renewable mineral resources and a large amount of energy are consumed in the production process of the cement, and a large amount of CO is generated2Gas, dust, etc., which are a great burden on the ecological environment. Reducing the consumption of resources and energy sources and the emission of carbon in the production and preparation of materials is one of the important challenges facing the world at present, and is also one of the keys for realizing energy conservation, emission reduction, low-carbon economy and sustainable development of the cement and special quick-hardening cementing material industry in China.
The method has the advantages that the industrial waste residue is explored and applied to the preparation of the rapid hardening cementing material, so that the preparation cost of the special rapid hardening material can be reduced, the problem of limitation of rapid hardening cement enterprises caused by bauxite limitation can be solved, the energy conservation, emission reduction and consumption reduction are facilitated, the resource utilization of industrial solid waste is promoted, and the method is an important way for realizing green, low carbon and sustainable development in the fields of cement industry and special rapid hardening materials. At present, although the related art is in the exploration stage, some published patent technical applications for preparing quick-hardening early-strength cementing materials or quick-hardening cement by using industrial waste residues exist, and the published patent technical applications are as follows:
the Chinese patent application No. 201210128015.7 relates to a preparation method of a quick-hardening early-strength hydraulic cementing material, which is characterized by comprising the following steps: the raw materials are taken according to the mixture ratio of 40-70% of calcium oxide residue, 10-30% of bauxite, 0-10% of phosphogypsum and 0-20% of pyrite cinder; weighing the raw materials according to the proportion, mixing, grinding to 200 meshes without screen residue, and preparing raw materials; calcining the raw material at 1250-1350 ℃ for 30-60 minutes, and then quenching to room temperature to obtain clinker; weighing clinker and natural dihydrate gypsum according to the mass ratio of 85-95: 5-15, mixing and grinding the mixture until the specific surface area is 400-550 m2And/kg, namely preparing the quick-hardening early-strength hydraulic cementing material. The invention makes full use of industrial waste residue, changes waste into valuable, saves energy and reduces emission, and the prepared hydraulic cementing material is an energy-saving and environment-friendly cementing material with good performance.
Chinese patent application No. 201410106787.X desulfurized gypsum based hydraulic cementing material and preparation method thereof, comprising the following steps: (1) the weight percentage of each raw material is as follows: 30-58% of desulfurized gypsum, 35-55% of slag, 0-25% of cement clinker and 0-30% of steel slag are selected for standby; (2) and (3) grinding the desulfurized gypsum powder/slag powder/cement clinker powder/steel slag to obtain powder with good particle grading effect, and mixing to obtain the desulfurized gypsum-based hydraulic cementing material. The invention has the following advantages: 1. the waterproof performance is excellent; 2. except that the cement clinker is a cement product, other raw materials are industrial solid wastes; 3. the process is simple, and the later strength can reach the standard of 42.5 common Portland cement; 4. the hydraulic cementing material prepared by the invention has better fresh water and seawater corrosion resistance than portland cement.
The Chinese patent application No. 201510393299.6 relates to a fast-hardening early-strength phosphorus slag-based cementing material and a preparation method thereof, which consists of granulated electric furnace phosphorus slag, graphite tailings, cement clinker, phosphogypsum, aluminum sulfate and alkaline components, wherein the alkaline components are formed by mixing sodium silicate and sodium hydroxide. The preparation method comprises the following steps: the phosphorus slag-based cementing material is prepared by respectively grinding the granulated electric furnace phosphorus slag, the graphite tailings and the cement clinker, and then uniformly mixing according to the mass ratio, and has the characteristics of quick hardening and early strength, and the setting time, the stability and the mechanical property of the phosphorus slag-based cementing material meet the requirements of GB175-2007 on P.O42.5R ordinary portland cement. The invention can promote the high-efficiency utilization of the phosphorus slag and the graphite tailings, save resources and energy and protect the environment.
The Chinese patent application No. 201711161828.5 discloses a method for preparing a fast-hardening early-strength phosphorus slag-based cementing material, which comprises the steps of ball-milling and crushing phosphorus slag, taking the crushed phosphorus slag as a culture substrate for culturing crops, culturing the crops on the surface of the culture substrate, and completely absorbing and utilizing phosphorus contained in the crops, so that the content of phosphorus pentoxide in the phosphorus slag is effectively reduced, and meanwhile, the surface structure of the phosphorus slag is effectively improved, the specific surface area of the phosphorus slag is increased, and the structural performance of the material is improved through the penetration and the load of the roots of the crops; the saline-alkali soil leachate is used as nutrient solution base fluid and plants such as salicornia europaea and the like are effectively irrigated, phosphorus is absorbed during plant growth, the gelled material prepared from the phosphate slag is excited and modified by the saline-alkali soil leachate, so that the dispersion and dissolution of the phosphate slag are promoted, and meanwhile, the aluminum slag is added into the culture medium, so that the content of the aluminum oxide material in the composite material is increased, and the prepared gelled material has excellent quick-hardening early-strength performance.
The Chinese patent application No. 201711367494.7 is a method for cementing and filling metal mine with early-strength and quick-hardening cementing material, which is characterized in that: the method comprises the following steps: (1) preparation of a filling site: cleaning a mining dead zone site, arranging a blocking wall at a hole of the mining dead zone, reserving a water and air exhaust port at the top of the blocking wall, and building a water and air exhaust pipeline into the water and air exhaust port; (2) preparing an early-strength quick-hardening gelling agent: mixing cement, fly ash, mineral powder, quicklime, phosphogypsum, bauxite, sodium bromide and a water reducing agent to obtain an early-strength quick-hardening gelling agent; (3) preparing a dry mixture: mixing and stirring the graded tailings and the early-strength quick-hardening gelling agent in a stirrer to obtain a dry mixture; (4) preparation of filling slurry: mixing and stirring the dry mixture and water in a secondary stirrer to obtain filling slurry; (5) filling: and automatically flowing the filling slurry to the mining empty area through the filling pipeline, and plugging the drainage and exhaust pipeline when the filling height of the slurry reaches the drainage and exhaust port, stopping slurry supply and cutting off the filling pipeline.
The Chinese patent application No. 201910824753.7 discloses a phosphogypsum-doped quick-setting and quick-hardening cement matrix, a concrete canvas prepared from the same and a construction method, wherein the cement matrix comprises the following raw materials in parts by weight: sulphoaluminate cement: 700-800 parts of acid-washed phosphogypsum: 200 to 300 portions. Filling the phosphogypsum-doped quick-setting and quick-hardening cement matrix into the three-dimensional space fabric, and arranging an adhesive sealing layer above the three-dimensional space fabric; the three-dimensional space fabric comprises an upper woven fabric layer, a fiber yarn layer and a lower woven fabric layer, wherein the fiber yarn layer is composed of three-dimensionally distributed fiber yarns. The invention provides a novel cement matrix for concrete canvas, the incorporation of phosphogypsum in the cement matrix system can obviously improve the strength so as to obtain excellent performance, and the incorporation of phosphogypsum can also provide a feasible solution for solving the problem of the existing phosphogypsum.
In view of published patent conditions, the related patent technologies at present mainly relate to the preparation of fast-hardening early-strength cementing materials or fast-hardening cement from industrial waste residues such as calcium oxide residues, phosphogypsum, pyrite cinder, desulfurized gypsum, slag, steel slag, granulated electric furnace phosphorus slag, tailings and the like.
The applicant consults a large amount of literature and tests and researches to find that the refining slag of the ladle furnace (LF furnace) which is a byproduct generated in the process of refining the crude steel or the waste steel by the ladle furnace is rich in heptaluminum dodecacalcium (C)12A7) And dicalcium silicate (C)2S) and the like, and the chemical composition of the mineral is very close to that of the quick-setting and coagulation-regulating cement sold in the markets of America, Japan, Korea and the like. Further research shows that after the refining slag of the LF furnace is quenched and quenched by wind in a molten state when discharged, the mineral composition of the refining slag is amorphous C12A7And beta-C2The S mineral phase is the main. Wherein, amorphous C12A7The mineral has the characteristics of rapid hydration, rapid setting and hardening, and can make the cement concrete generate high early strength; beta-C2The S mineral has higher later-stage hydration hardening performance, can improve later-stage mechanical property and durability of the cementing material, and overcomes the defect of poor later-stage durability of the common early-strength quick-hardening cement-based material. Therefore, the LF furnace refining slag quenched by wind has great potential for preparing early-strength quick-hardening cement-based materials.
The steel yield of China is at the top of the world for 23 years continuously, and the steel is a country with all industrial departments in the united domestic industry classification, and more than 200 steel products exist. And with the accelerating of steel and iron in China entering depreciation times and the great demand of China on special steel/high-quality steel, the demand of refining scrap steel and crude steel is rapidly increasing year by year, and a great amount of LF furnace refining slag is generated. According to statistics, 20-50kg of LF refining slag needs to be discharged when 1t of molten steel is refined. According to the waste steel depreciation amount of 2.2 million tons in 2018 years and the crude steel yield of 9.28 million tons in China (data of China iron and steel Association and national statistical office), 1148 to 2870 million tons of LF refining slag are generated every year if 1/2 waste steel and crude steel are refined by adopting an LF furnace. At present, only a small amount of LF furnace refining slag is recycled as a metallurgical return material, most of the rest refining slag is often mixed with common converter steel slag and the like to be discharged, the resource utilization added value and the utilization rate are low, hundreds of millions of tons of steel slag are stacked and left unused year after year, a large amount of land is occupied, and meanwhile, metal ions and powder in the steel slag occupy a large amount of landDust and the like can be released into the environment, and environmental pollution is caused. Therefore, the refining slag of the LF furnace fully utilizes the amorphous C contained in the air quenching LF furnace12A7And beta-C2The S mineral phase has potential value, has important significance of waste utilization, environmental protection, solid waste high added value utilization and wide popularization and application prospect when being used for preparing the high early strength and rapid hardening cementing material.
Disclosure of Invention
The invention aims to provide a waste-utilizing environment-friendly high-early-strength fast-hardening cementing material and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the waste-utilizing environment-friendly high-early-strength rapid-hardening cementing material consists of refining slag of an air quenching and quenching LF furnace, gypsum, limestone, nitrate and an additive, wherein the mass parts of the components are as follows: 40-80 parts of refining slag of an air quenching LF furnace, 10-40 parts of gypsum, 5-15 parts of carbonate, 4-15 parts of nitrate and 0.1-1 part of an additive.
Preferably, the refining slag of the wind quenching and quenching LF furnace is waste slag discharged when a steel is refined by a ladle furnace, is subjected to wind quenching and quenching treatment in a molten state, is crushed, magnetically separated, screened and deironized, and is mainly obtained by amorphous C12A7And beta-C2The S mineral is the main mineral.
Preferably, the gypsum is one or more of natural dihydrate gypsum, desulfurized gypsum, citric acid gypsum and hemihydrate gypsum.
Preferably, the carbonate is calcium carbonate slag which is a byproduct generated in the process of preparing the slow-release ammonium sulfate fertilizer by using phosphogypsum, and mainly comprises CaCO3Minerals are the main.
Preferably, the nitrate is a byproduct generated in the process of producing the nitrophosphate fertilizer by a freezing method, and mainly comprises Ca (NO)3)2·4H2The O mineral is the main.
Preferably, the additive is prepared by mixing 5-30 parts of sucrose, 5-15 parts of sodium gluconate, 0-20 parts of citric acid, 5-20 parts of naphthalene sulfonate formaldehyde condensate and 50-80 parts of water in parts by weight.
The invention also provides a method for preparing the waste-utilizing environment-friendly high-early-strength fast-hardening cementing material, which is characterized in that the prepared refining slag of the air quenching LF furnace is uniformly mixed with gypsum, carbonate and nitrate according to the mass proportion or parts; uniformly spraying the prepared admixture on the mixed material according to the mass proportion or parts; finally, the materials are ground in a ball mill until the specific surface area is 410 +/-10 m2The micropowder/kg, namely obtaining the cementing material.
The invention has the beneficial effects that:
1. the waste-utilizing environment-friendly high-early-strength fast-hardening binding material developed by the invention has the advantages that the consumption of industrial waste residues reaches 60-100%, and raw materials mainly come from byproducts of enterprises such as steel smelting, phosphate fertilizer production and the like, so that on one hand, the resource utilization (especially high-added-value utilization) of steel refining waste residues and other industrial byproducts in China can be effectively promoted; on the other hand, the industrial waste residues have wide sources (almost each province in China has a production enterprise for refining and preparing steel products by using rough steel or scrap steel), most of the industrial waste residues can be obtained from local materials, and therefore the problem that the distribution of the quick-hardening cement enterprises in China is not wide (only individual provinces are distributed) due to the limited distribution of resources such as bauxite and the like can be solved; in the third aspect, the invention is mainly prepared by using industrial waste residues, so the cost is lower, and the production can be widely distributed, thereby being beneficial to promoting the large-scale popularization and application of the rapid hardening cementing material in special projects such as rush repairs, rush construction projects, low-temperature construction projects, prefabricated parts and the like.
2. The waste-utilizing environment-friendly high early strength fast hardening binding material has low cost and excellent performance, and mainly comprises the following components in percentage by weight: the main component of the invention is rich in C12A7And C2The LF furnace refining slag of S and other minerals is quenched by wind in the molten state during discharge, and the mineral composition is amorphous C12A7And beta-C2The S mineral phase is the main. Wherein, amorphous C12A7The mineral has the characteristics of quicker hydration and quicker setting and hardening, and can lead the cementing material to have the characteristics of quick setting and hardening and high early strength; beta-C2The S mineral has higher later hydration hardening performance and can improve the later strength of the cementing materialThe material has good learning and durability performance, and overcomes the defect of poor later durability of the common early-strength and quick-hardening cement-based material.
3. The gypsum components (including natural dihydrate gypsum, desulfurized gypsum, citric acid gypsum and semihydrate gypsum) of the invention are used for solving the problem of amorphous C in the refining slag of the air quenching LF furnace12A7The hydration products formed by the early rapid hydration of the mineral facies can be greatly coated on the surface of the unhydrated beta-C2S mineral (namely hydration film shielding effect), so that the later stage hydration is hindered, and the later stage performance development of the material is influenced by the possible crystal form transformation of the early stage hydration products, namely the optimization of the types and the structures of the hydration products (gypsum and C)12A7The mineral phase can form ettringite in early and middle stages, improve the composition of hydration products and increase the structural compactness) to adjust and improve the early and later stage performance of the high early strength and rapid hardening binding material.
4. Similar to the quick hardening sulphoaluminate cement and the like at the present stage, the ettringite is also an important hydration product of the quick hardening cementing material, plays an important role in the hydration hardening of the material, and has higher content. However, ettringite is not completely stable in a hydration system of a cementing material, and can be converted into monothio-type hydrated calcium sulphoaluminate after the gypsum is exhausted, and the monothio-type hydrated calcium sulphoaluminate is difficult to play the role of the ettringite. Therefore, the invention is different from other technologies in another important innovation and beneficial effect: the carbonate and nitrate components of the invention can prevent ettringite from changing into monothiohydrated calcium sulfoaluminate (which can be combined with ettringite to form carbonate ettringite phase CO)3-AFt, nitrate ettringite phase NO3AFt) which plays a role in the stability of ettringite, thereby improving the stability of the gelled material in the later hardening period and promoting the good development of the performance.
5. The other auxiliary component of the invention is an additive which is prepared from sucrose, sodium gluconate and/or citric acid, a naphthalenesulfonate formaldehyde condensate and water, and the additive has low doping amount but obvious effect. The expression is as follows: firstly, the hydration rate and the setting time of the high early-strength rapid-hardening binding material are adjusted through the synergistic superposition effect of the components of cane sugar, sodium gluconate and/or citric acid, so that the high early-strength rapid-hardening binding material has controllable construction time or hydration hardening process; the naphthalene sulfonate formaldehyde condensate component is used for adjusting and optimizing the workability or fluidity of the high early strength rapid hardening binding material so as to solve the problem of poor workability often presented by the rapid hardening material.
Detailed Description
The present invention will be further described with reference to the following examples, which are provided for the purpose of illustrating the present invention, and the scope of the present invention is not limited to the following examples.
The invention relates to a waste-utilizing environment-friendly high-early-strength rapid-hardening cementing material which consists of refining slag of an air quenching LF furnace, gypsum, limestone, nitrate and an additive, wherein the mass parts of the components are as follows: 40-80 parts of refining slag of an air quenching LF furnace, 10-40 parts of gypsum, 5-15 parts of carbonate, 4-15 parts of nitrate and 0.1-1 part of an additive.
Preferably, the refining slag of the wind quenching and quenching LF furnace is waste slag discharged when a steel is refined by a ladle furnace, is subjected to wind quenching and quenching treatment in a molten state, is crushed, magnetically separated, screened and deironized, and is mainly obtained by amorphous C12A7And beta-C2The S mineral is the main mineral.
Preferably, the gypsum is one or more of natural dihydrate gypsum, desulfurized gypsum, citric acid gypsum and hemihydrate gypsum.
Preferably, the carbonate is calcium carbonate slag which is a byproduct generated in the process of preparing the slow-release ammonium sulfate fertilizer by using phosphogypsum, and mainly comprises CaCO3Minerals are the main.
Preferably, the nitrate is a byproduct generated in the process of producing the nitrophosphate fertilizer by a freezing method, and mainly comprises Ca (NO)3)2·4H2The O mineral is the main.
Preferably, the additive is prepared by mixing 5-30 parts of sucrose, 5-15 parts of sodium gluconate, 0-20 parts of citric acid, 5-20 parts of naphthalene sulfonate formaldehyde condensate and 50-80 parts of water in parts by weight.
The invention also provides a preparation method of the waste utilization materialThe method for preparing the environment-friendly high early strength and quick hardening cementing material comprises the steps of uniformly mixing the prepared refining slag of the air quenching and quenching LF furnace with gypsum, carbonate and nitrate according to the mass proportion or parts; uniformly spraying the prepared admixture on the mixed material according to the mass proportion or parts; finally, the materials are ground in a ball mill until the specific surface area is 410 +/-10 m2The micropowder/kg, namely obtaining the cementing material.
Example 1
Firstly, uniformly mixing 60 parts of refining slag of an air quenching LF furnace, 30 parts of semi-hydrated gypsum, 5 parts of by-product calcium carbonate slag and 4 parts of by-product nitrate according to a mass ratio or parts; secondly, uniformly mixing 30 parts of cane sugar, 5 parts of sodium gluconate, 5 parts of naphthalene sulfonate formaldehyde condensate and 60 parts of water according to a mass ratio or parts to prepare an additive, and uniformly spraying 0.2 part of the prepared additive on the solid material; finally, the materials are ground in a ball mill until the specific surface area is 410 +/-10 m2And/kg of micro powder, namely obtaining the waste-utilizing environment-friendly high early strength fast hardening cementing material.
Example 2
Firstly, uniformly mixing 50 parts of air-quenched quenching LF furnace refining slag, 35 parts of natural dihydrate gypsum, 7 parts of calcium carbonate slag and 7.2 parts of byproduct nitrate according to a mass ratio or parts; secondly, uniformly mixing 20 parts of cane sugar, 10 parts of sodium gluconate, 10 parts of citric acid, 5 parts of naphthalene sulfonate formaldehyde condensate and 55 parts of water according to a mass ratio or parts to prepare an additive, and uniformly spraying 0.2 part of the prepared additive on the solid material; finally, the materials are ground in a ball mill until the specific surface area is 410 +/-10 m2And/kg of micro powder, namely obtaining the waste-utilizing environment-friendly high early strength fast hardening cementing material.
Example 3
Firstly, uniformly mixing 45 parts of air-quenched quenching LF furnace refining slag, 30 parts of desulfurized gypsum, 9.5 parts of calcium carbonate slag and 15 parts of byproduct nitrate according to a mass ratio or parts; secondly, uniformly mixing 10 parts of cane sugar, 10 parts of sodium gluconate, 10 parts of citric acid, 10 parts of naphthalene sulfonate formaldehyde condensate and 60 parts of water according to a mass ratio or parts to prepare an additive, and then taking the prepared additive0.1 part of additive is uniformly sprayed on the solid material according to the mass proportion or parts; finally, the materials are ground in a ball mill until the specific surface area is 410 +/-10 m2And/kg of micro powder, namely obtaining the waste-utilizing environment-friendly high early strength fast hardening cementing material.
Example 4
Firstly, uniformly mixing 42 parts of air-quenched quenching LF furnace refining slag, 28 parts of citric gypsum, 14.5 parts of calcium carbonate slag and 15 parts of byproduct nitrate according to a mass ratio or parts; secondly, uniformly mixing 5 parts of cane sugar, 15 parts of sodium gluconate, 5 parts of naphthalene sulfonate formaldehyde condensate and 75 parts of water according to a mass ratio or parts to prepare an additive, and uniformly spraying 0.1 part of the prepared additive on the mixed solid material according to a mass ratio or parts; finally, the materials are ground in a ball mill until the specific surface area is 410 +/-10 m2And/kg of micro powder, namely obtaining the waste-utilizing environment-friendly high early strength fast hardening cementing material.
Example 5
Firstly, uniformly mixing 75 parts of air-quenched quenching LF furnace refining slag, 15 parts of semi-hydrated gypsum, 5 parts of calcium carbonate slag and 4 parts of byproduct nitrate according to a mass ratio or parts; secondly, uniformly mixing 30 parts of cane sugar, 5 parts of sodium gluconate, 10 parts of naphthalene sulfonate formaldehyde condensate and 55 parts of water according to a mass ratio or parts to prepare an additive, and uniformly spraying 0.2 part of the prepared additive on the mixed solid material according to a mass ratio or parts; finally, the materials are ground in a ball mill until the specific surface area is 410 +/-10 m2And/kg of micro powder, namely obtaining the waste-utilizing environment-friendly high early strength fast hardening cementing material.
The performance results of the waste-utilizing environment-friendly high early strength rapid hardening binding material prepared in the above example are shown in table 1, wherein 42.5R type rapid hardening ordinary portland cement and 42.5 grade rapid hardening sulphoaluminate cement are selected as a control group 1 and a control group 2 respectively.
Table 1 physical and mechanical properties of waste-utilized environment-friendly high early strength fast hardening cementitious materials.
As can be seen from Table 1, the setting time of the high early strength and rapid hardening binding material in the embodiment of the invention meets the requirements of rapid hardening sulphoaluminate cement specified in the standard GB20472-2006, the strength of the high early strength and rapid hardening binding material is superior to that of a control group, and the setting time is higher than the physical and mechanical performance indexes of 42.5R rapid hardening sulphoaluminate cement specified in GB175-2007 and 42.5 rapid hardening sulphoaluminate cement specified in GB 20472-2006. The high early strength and quick hardening cementing material of the invention shows good performance and effect.
Various corresponding changes and modifications can be made by those skilled in the art based on the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.
Claims (4)
1. The waste-utilizing environment-friendly high-early-strength fast-hardening cementing material is characterized by comprising the following components in parts by mass: 40-80 parts of refining slag of an air quenching LF furnace, 10-40 parts of gypsum, 5-15 parts of carbonate, 4-15 parts of nitrate and 0.1-1 part of additive; the refining slag of the wind quenching and quenching LF furnace is waste slag discharged when a ladle furnace refines steel, is subjected to wind quenching and quenching treatment in a molten state, is crushed, magnetically separated, screened and deironized to obtain the refining slag, and is mainly prepared from amorphous C12A7And beta-C2S mineral is the main; wherein the carbonate is calcium carbonate slag which is a byproduct generated in the process of preparing the slow-release ammonium sulfate fertilizer by using phosphogypsum, and mainly comprises CaCO3Mainly comprising minerals; the nitrate is a byproduct generated in the process of producing the nitrophosphate fertilizer by a freezing method, and mainly comprises Ca (NO)3)2·4H2The O mineral is the main.
2. The waste-utilizing environment-friendly high-early-strength fast-hardening binding material as claimed in claim 1, wherein the gypsum is one or more of natural dihydrate gypsum, desulfurized gypsum, citric acid gypsum and hemihydrate gypsum.
3. The waste-utilizing environment-friendly high-early-strength fast-hardening binding material as claimed in claim 1, wherein the additive is prepared by mixing 5-30 parts by mass of sucrose, 5-15 parts by mass of sodium gluconate, 0-20 parts by mass of citric acid, 5-20 parts by mass of naphthalene sulfonate formaldehyde condensate and 50-80 parts by mass of water.
4. The method for preparing the waste-utilizing environment-friendly high-early-strength fast-hardening binding material as claimed in claim 1, characterized in that the prepared refining slag of the air quenching and quenching LF furnace is uniformly mixed with gypsum, carbonate and nitrate according to the mass proportion or parts; uniformly spraying the prepared admixture on the mixed material according to the mass proportion or parts; finally, the materials are ground in a ball mill until the specific surface area is 410 +/-10 m2The micropowder/kg, namely obtaining the cementing material.
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