阅读说明：本技术 一种胶凝材料 (Cementing material ) 是由 吴疑 彭亚环 付志群 石建红 孙章权 林培芳 韦波 罗元威 董磊 张胜祥 于 2021-09-23 设计创作，主要内容包括：本发明公开了一种胶凝材料。这种胶凝材料包括以下组分：复合微粉、激发剂、减水剂；复合微粉包括钢渣、水淬渣和铸余渣。本发明将钢渣、水淬渣、铸余渣混合制备的复合微粉实现活性矿物相的成分互补,通过选用合适的激发体系可定向形成目标产物,提高胶凝材料的强度和稳定性。(The invention discloses a cementing material. The cementing material comprises the following components: composite micro powder, an excitant and a water reducing agent; the composite micro powder comprises steel slag, water-quenched slag and casting residue. The composite micro powder prepared by mixing the steel slag, the water-quenched slag and the casting residues realizes the component complementation of active mineral phases, and can directionally form a target product by selecting a proper excitation system, thereby improving the strength and the stability of the cementing material.)

1. A cementitious material, comprising the following components: composite micro powder, an excitant and a water reducing agent; the composite micro powder comprises steel slag, water-quenched slag and casting residue.

2. The cement material as claimed in claim 1, wherein the cement material comprises the following components in parts by mass: 800-1200 parts of composite micro powder, 30-50 parts of excitant and 0.5-2 parts of water reducing agent.

3. The cementing material of claim 2, wherein the composite micro powder comprises the following components in parts by mass: 10-50 parts of steel slag, 10-50 parts of water quenching slag and 10-50 parts of casting residue.

4. The cementing material of claim 3, wherein the steel slag comprises the following components in percentage by mass: 30-50% of CaO and 10-25% of Fe₂O₃、3-8％Al₂O₃、10-20％SiO₂、4-10％MgO、2-8％MnO。

5. Cementitious material according to claim 3, characterised in that said steel is steelThe specific surface area of the slag is 3000-4000cm²/g。

6. The cementing material of claim 3, wherein the water-quenched slag comprises the following components in percentage by mass: 25-40% SiO₂、30-50％CaO、10-20％Al₂O₃、5-15％MgO、1-4％SO₃、0.2-0.8％Na₂O。

7. The cementing material of claim 3, wherein the water-quenched slag has a specific surface area of 4000-5000cm²/g。

8. The cement material as claimed in claim 3, wherein the casting residue comprises the following components in percentage by mass: 35-50% of CaO and 20-35% of Al₂O₃、8-15％SiO₂、6-12％MgO、1-1.6％CaF₂、0.5-0.9％MnO、0.3-0.7％Fe₂O₃。

9. The cementitious material as claimed in claim 3, wherein the specific surface area of the casting residue is 2800-3500cm²/g。

10. A method for preparing a cementitious material according to any one of claims 1 to 9, characterised in that it comprises the following steps: and mixing the composite micro powder, the exciting agent and the water reducing agent to obtain the cementing material.

Technical Field

The invention relates to the technical field of solid waste recycling, and particularly relates to a cementing material.

Background

With the accelerated construction of urbanization in China, the demands of markets for steel, iron and aluminum are increasing day by day, the discharge amount of industrial solid wastes is huge, but the utilization rate is low, the steel, iron and aluminum are basically in a waste and accumulation state, and environmental pollution, land occupation and resource waste are caused.

The steel slag, the casting residue and the water quenching slag are main industrial wastes and byproducts in the steel-making, iron-making and metallurgy industries, the steel slag is formed by reacting impurities in pig iron and a solvent in the smelting process in the steel-making process, and the components of the steel slag comprise tricalcium silicate, dicalcium silicate, iron aluminate active minerals and RO phases. The water quenching slag is a vitreous body formed by quenching a molten mixture of a cosolvent, gangue, ash and other impurities which react at a high temperature in a blast furnace to more than 1400 ℃. The casting residue is a mixture of the residual molten steel and the residue after the molten steel in the ladle is continuously cast or cast ingot, and the casting residue mainly contains C₂S、C₃S, a small amount of aluminate and glass.

The industry has less systematic research on the synergistic stimulation of several different solid wastes, which is also the main reason for the difficulties in the co-digestion of industrial solid wastes. At present, most of traditional alkali-activated materials are activated by single components, the difference of activation performances of different industrial solid wastes is large, and the insufficient aluminum phase and calcium phase easily occur due to the single phase of an activated system, so that a target hydration product is difficult to generate.

Disclosure of Invention

In order to solve the problem that the steel slag, the casting residue and the water quenching slag in the prior art can not be fully utilized, the invention aims to provide a cementing material, and the invention aims to provide a preparation method of the cementing material.

The solid waste composite micro powder is based on a synergistic excitation chemical principle, and an active exciting agent is prepared to excite potential active components of the material to obtain corresponding gelling activity, so that industrial wastes and byproducts are reasonably prepared to form a hydraulic gelling material product. The method is based on the chemical activity and phase composition difference of various different industrial solid wastes, compounds several solid wastes, adjusts the internal potential active mineral phase composition, and adopts a synergistic excitation mode to excite the gelling activity of the material, thereby realizing the synergistic digestion and large-scale resource utilization of the waste in the steel industry.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a cementitious material comprising the following components: composite micro powder, an excitant and a water reducing agent; the composite micro powder comprises steel slag, water-quenched slag and casting residue.

Preferably, the cementing material comprises the following components in parts by mass: 800-; further preferably, the cementing material comprises the following components in parts by mass: 900-1100 parts of composite micro powder, 35-45 parts of excitant and 0.8-1.5 parts of water reducing agent; still further preferably, the cementing material comprises the following components in parts by mass: 950 and 1050 parts of composite micro powder, 38 to 42 parts of excitant and 0.9 to 1.1 parts of water reducing agent; still more preferably, the cementing material comprises the following components in parts by mass: 1000 parts of composite micro powder, 40 parts of excitant and 1 part of water reducing agent.

Preferably, the cementing material, the components also comprise water; further preferably, the water-to-glue ratio is 0.3-0.5; still more preferably, the water-to-glue ratio is 0.35-0.45; still more preferably, the water to gel ratio is 0.4.

Preferably, in the cementing material, the composite micro powder comprises the following components in parts by mass: 10-50 parts of steel slag, 10-50 parts of water quenching slag and 10-50 parts of casting residue; further preferably, the composite micro powder comprises the following components in parts by mass: 20-50 parts of steel slag, 20-40 parts of water quenching slag and 10-50 parts of casting residue; still further preferably, the composite micro powder comprises the following components in parts by mass: 20-40 parts of steel slag, 20-40 parts of water quenching slag and 30-50 parts of casting residue; more preferably, the composite micro powder comprises the following components in parts by mass: 40 parts of steel slag, 20 parts of water-quenched slag and 40 parts of casting residue.

Preferably, in the cementing material, the steel slag comprises the following components in percentage by mass: 30-50% of CaO and 10-25% of Fe₂O₃、3-8％Al₂O₃、10-20％SiO₂4-10% of MgO and 2-8% of MnO; further preferably, the steel slag comprises the following components in percentage by mass: 35-48% of CaO and 12-22% of Fe₂O₃、4-7％Al₂O₃、14-18％SiO₂5-9% of MgO and 3-7% of MnO; still further preferably, the steel slag comprises the following components in percentage by mass: 38-45% of CaO and 14-21% of Fe₂O₃、4-7％Al₂O₃、14-18％SiO₂5-9% of MgO and 3-7% of MnO; still more preferably, the steel slag comprises the following components in percentage by mass: 40-44% of CaO and 15-20% of Fe₂O₃、4.5-6.5％Al₂O₃、15-17.5％SiO₂6-8.5% of MgO and 4-5.5% of MnO; the steel slag is formed by reacting impurities in pig iron and a solvent in a smelting process in a steelmaking process, the components of the steel slag comprise tricalcium silicate, dicalcium silicate, an iron aluminate active mineral and an RO phase, the steel slag has the characteristics similar to cement, the cement doped with the steel slag powder has the characteristics of high breaking strength, wear resistance, corrosion resistance, excellent freeze-thaw performance and the like, and meanwhile, f-CaO (free calcium oxide) in the finely ground steel slag powder and steel slag micropowder have the mutual excitation potential with other potential active materials due to higher surface energy, so that the gelling activity and stability of the gelling material can be further improved.

In some preferred embodiments of the present invention, the steel slag comprises the following components by mass percent: 40.5-43.6% of CaO and 15.6-19.3% of Fe₂O₃、4.92-6.04％Al₂O₃、15.4-16.9％SiO₂、6.49-8.01％MgO、4.23-5.11％MnO。

Preferably, in the cementing material, the specific surface area of the steel slag is 3000-4000cm²(ii)/g; more preferably, the specific surface area of the steel slag is 3200-²(ii)/g; still more preferably, the specific surface area of the steel slag is 3400-²(ii)/g; more preferably, the specific surface area of the steel slag is 3472-3478cm²/g。

Preferably, in the cementing material, the apparent density of the steel slag is 2 to 3.5g/cm³(ii) a More preferably, the apparent density of the steel slag is 2.5 to 3g/cm³(ii) a Still more preferably, the steel slag has an apparent density of 2.7 to 2.9g/cm³(ii) a More preferably, the steel slag has an apparent density of 2.77 to 2.82g/cm³。

Preferably, in the cementitious material, the steel slag has a bulk density of 1 to 1.6g/cm³(ii) a More preferably, the steel slag has a bulk density of 1.2 to 1.5g/cm³(ii) a Still more preferably, the steel slag has a bulk density of 1.3 to 1.4g/cm³(ii) a More preferably, the steel slag has a bulk density of 1.34g/cm³。

Preferably, in the cementing material, the grain diameter of the steel slag is less than or equal to 200 mu m; more preferably, the grain size of the steel slag is less than or equal to 190 mu m; still more preferably, the steel slag has a particle size of 180 μm or less.

Preferably, in the cementitious material, the steel slag has a median particle diameter d₅₀5-8 μm; more preferably, the median particle diameter d of the steel slag₅₀6-7 μm; still more preferably, the median particle diameter d of the steel slag₅₀It was 6.7 μm.

Preferably, in the cementing material, the most probable particle size of the steel slag is 30-50 μm; more preferably, the most probable particle size of the steel slag is 35-45 μm; still more preferably, the steel slag has a mode particle size of 40 μm.

Preferably, in the cementing material, the water-quenched slag comprises the following components in percentage by mass: 25-40% SiO₂、30-50％CaO、10-20％Al₂O₃、5-15％MgO、1-4％SO₃、0.2-0.8％Na₂O; further preferably, the water-quenched slag comprises the following components in percentage by mass: 28-38% SiO₂、35-45％CaO、12-18％Al₂O₃、7-13％MgO、1.5-3.5％SO₃、0.3-0.7％Na₂O; still further preferably, the water-quenched slag comprises the following components in percentage by mass: 30-35% SiO₂、37-42％CaO、13-17％Al₂O₃、8-12％MgO、1.8-3.2％SO₃、0.3-0.7％Na₂O; still more preferably, the water-quenched slag comprises the following components in percentage by mass: 30.5-34% SiO₂、37.5-41％CaO、14-16％Al₂O₃、9-11％MgO、2-3％SO₃、0.3-0.7％Na₂O; the water-quenched slag has good latent hydraulicity, can partially replace cement, and can improve the strength, sulfate erosion resistance, chloride ion erosion resistance, cohesiveness, segregation resistance and other properties of the cementing material by adding a certain amount of water-quenched slag micro powder.

Preferably, in the cementing material, the components of the water quenching slag also comprise 0.5 to 1 weight percent of ignition loss; in some preferred embodiments of the present invention, the water-quenched slag comprises the following components by mass: 31.1-33.7% SiO₂、38.2-40.5％CaO、14.8-15.5％Al₂O₃、9.2-10.3％MgO、2.1-2.8％SO₃、0.4-0.6％Na₂O and 0.67-0.83% loss on ignition.

Preferably, in the cementing material, the specific surface area of the water-quenched slag is 4000-5000cm²(ii)/g; further preferably, the specific surface area of the water-quenched slag is 4200-²(ii)/g; still more preferably, the specific surface area of the water-quenched slag is 4400-²(ii)/g; more preferably, the specific surface area of the water-quenched slag is 4410-4427cm²/g。

Preferably, in the cementing material, the apparent density of the water quenching slag is 2.5-3.5g/cm³(ii) a Further preferably, the water-quenched slag has an apparent density of 2.7 to 3.1g/cm³(ii) a Still more preferably, the water-quenched slag has an apparent density of 2.89 to 2.95g/cm³。

Preferably, in the cementing material, the grain diameter of the water quenching slag is less than or equal to 170 mu m; further preferably, the grain diameter of the water quenching slag is less than or equal to 160 mu m; still more preferably, the grain size of the water-quenched slag is not more than 150 μm.

Preferably, in the cementing material, the casting residues are casting residues subjected to ball milling and magnetic separation pretreatment; the casting residue is a mixture of the residual molten steel and the residue after the continuous casting or ingot casting of the molten steel in the steel ladle, and the casting residue mainly contains C₂S、C₃S, a small amount of aluminate and glass, and also has good hydraulic cementing activity, and the casting residue powder can be applied to building materials by reasonably compounding the casting residue and other active materials.

Preferably, in the cementitious material, the casting residueComprises the following components in percentage by mass: 35-50% of CaO and 20-35% of Al₂O₃、8-15％SiO₂、6-12％MgO、1-1.6％CaF₂、0.5-0.9％MnO、0.3-0.7％Fe₂O₃(ii) a Further preferably, the casting residue comprises the following components in percentage by mass: 38-48% of CaO and 22-32% of Al₂O₃、10-14％SiO₂、7-11％MgO、1.2-1.5％CaF₂、0.6-0.8％MnO、0.4-0.6％Fe₂O₃(ii) a Still further preferably, the casting residue comprises the following components in percentage by mass: 40-46% of CaO and 25-30% of Al₂O₃、11-14％SiO₂、8-11％MgO、1.2-1.5％CaF₂、0.6-0.8％MnO、0.4-0.6％Fe₂O₃(ii) a Still more preferably, the casting residue comprises the following components in percentage by mass: 42-46% of CaO and 26-29% of Al₂O₃、11-14％SiO₂、8-11％MgO、1.2-1.5％CaF₂、0.6-0.8％MnO、0.4-0.6％Fe₂O₃。

In some preferred embodiments of the present invention, the casting residue comprises the following components in percentage by mass: 42.4 to 45.7 percent of CaO and 26.6 to 28.1 percent of Al₂O₃、11.4-13.5％SiO₂、8.7-10.5％MgO、1.3-1.4％CaF₂、0.65-0.75％MnO、0.45-0.55％Fe₂O₃。

Preferably, in the cementing material, the grain diameter of casting residue is less than or equal to 150 μm; further preferably, the proportion of the casting residue with the grain diameter of 20-100 mu m is 10-30%; still more preferably, the proportion of the casting residue with the grain diameter of 20-100 μm is 15-25%; still more preferably, the proportion of the casting residue with the grain diameter of 20-100 μm is 18-22%; more preferably, the ratio of the grain size of the casting residue of 20 to 100 μm is 20%.

Preferably, in the cementing material, the ratio of the grain diameter of the casting residue to be more than or equal to 45 mu m is less than or equal to 50 percent; more preferably, the proportion of the casting residues with the grain diameter more than or equal to 45 mu m is less than or equal to 45 percent; still more preferably, the ratio of the grain diameter of the casting residue to be more than or equal to 45 mu m is less than or equal to 43 percent; more preferably, the ratio of the grain diameter of the casting residue to be more than or equal to 45 mu m is less than or equal to 41 percent.

Preference is given toIn the cementing material, the specific surface area of the casting residue is 2800-3500cm²(ii)/g; more preferably, the specific surface area of the casting residue is 3000-3300cm²(ii)/g; still more preferably, the specific surface area of the casting residue is 3100-²(ii)/g; more preferably, the specific surface area of the casting residue is 3165-3171cm²(ii)/g; the specific surface area is measured by using a Boehringer specific surface area meter.

Preferably, in the cementitious material, the casting residue has a density of 2.5 to 3.5g/cm³(ii) a Further preferably, the density of the casting residue is 2.7 to 3.1g/cm³(ii) a Still more preferably, the density of the casting residue is 2.85 to 3.05g/cm³(ii) a More preferably, the casting residue has a density of 2.91 to 2.95g/cm³(ii) a The density was measured by the Lee's bottle kerosene method.

Preferably, in the cementing material, the excitant is one or more compounds of gypsum, quicklime, alkali metal silicate, alkali metal sulfate, alkali metal carbonate, alkali metal aluminate, polychlorinated salt and water glass-alkali metal hydroxide; further preferably, the excitant is one or more of gypsum, alkali metal silicate and alkali metal carbonate; still more preferably, the activator is a combination of gypsum, alkali metal silicate and alkali metal carbonate.

Preferably, in the cementing material, the excitant is compounded by 30 to 50 weight percent of sodium silicate, 30 to 50 weight percent of sodium carbonate and 10 to 30 weight percent of gypsum; still further preferably, the excitant is compounded by 35 to 45 weight percent of sodium silicate, 35 to 45 weight percent of sodium carbonate and 15 to 25 weight percent of gypsum; more preferably, the activator is a combination of 40 wt% sodium silicate, 40 wt% sodium carbonate and 20 wt% gypsum.

Preferably, in the cementing material, the water reducing agent is at least one of a naphthalene water reducing agent, a lignosulfonate water reducing agent, a polycarboxylic acid water reducing agent and a graft copolymer water reducing agent; more preferably, the water reducing agent is at least one of a naphthalene water reducing agent, a polycarboxylic acid water reducing agent and a graft copolymer water reducing agent.

The invention also provides a preparation method of the cementing material, which comprises the following steps: mixing the composite micro powder, the exciting agent and the water reducing agent to obtain the cementing material; further preferably, the preparation method of the cementing material comprises the following steps: and mixing the composite micro powder, the exciting agent, the water reducing agent and water to obtain the cementing material.

The invention has the beneficial effects that:

according to the invention, bulk steel industrial waste is used as a main raw material, and the synergistic excitation is carried out after the compounding of several solid waste micro powders, so that the cementing material with good mechanical properties is prepared. The composite micro powder prepared by mixing the steel slag, the water-quenched slag and the casting residues realizes the component complementation of active mineral phases, and can directionally form a target product by selecting a proper excitation system, thereby improving the strength and the stability of the cementing material.

According to the invention, the steel industry solid waste is reasonably configured, the composite micro powder passes through the exciting agent, a synergistic excitation system of the steel industry solid waste is established, the component differentiation between different solid wastes is reduced, the potential active mineral complementation between various solid wastes is realized, the mechanical property and stability after the activity excitation are improved, the solid waste based cementing material with the performance comparable to that of P.O32.5 cement is prepared, a disposal mode of the steel industry solid waste with economy and environmental protection is provided for the metallurgical industry, and the large-scale resource utilization of wastes is realized.

According to the invention, a compound activity test is carried out on three ferrous metallurgy solid waste micro powders of steel slag, water quenching slag and casting residue, and a solid waste composite powder proportion with high economy and activity is prepared in a synergistic modification excitation mode, so that a large amount of metallurgy solid waste can be consumed on a large scale, and a test basis and a theoretical basis are provided for subsequent solid waste zero emission and resource allocation.

Detailed Description

The present invention will be described in further detail with reference to specific examples. The starting materials or apparatuses used in the examples and comparative examples were obtained from conventional commercial sources or may be obtained by a method of the prior art, unless otherwise specified. Unless otherwise indicated, the testing or testing methods are conventional in the art.

Example 1

And determining the proportion of the composite micro powder through a sand-glue activity test.

According to the GB/T17671-1999 cement mortar strength test method (ISO method), 450g P.O 42.5.5 cement, 1350g standard sand and 225g water are weighed, and a JJ-5 type cement mortar stirrer is used for preparing a cement reference sample; P.O 42.5.5 cement with a specific surface area of 310-330 m²Kg, density 3.07g/cm³The water consumption of the standard consistency is 125-129 g, the initial setting time is 150-160 min, and the final setting time is 300-330 min.

Drying the steel slag, the water-quenched slag and the casting residue to constant weight at 105 ℃ by using an oven, cooling to room temperature, and crushing by using a jaw crusher until the particle size is less than 0.3 mm; respectively grinding the three solid wastes for 60min by a ball mill, and respectively sieving the discharged micro powder by 80-mesh, 100-mesh and 200-mesh square-hole sieves to quickly remove non-ground particles; and putting the unground particles into the ball mill again for secondary grinding, collecting the finally screened solid waste micro powder, and storing the solid waste micro powder in a dry sealed barrel in a classified manner.

Weighing 225g of composite micro powder, 225g of cement, 1350g of standard sand and 225g of water, and preparing a mortar sample of the composite micro powder by using a mortar stirrer; the composite micro powder is the mixture of steel slag, water quenching slag and casting residue solid waste micro powder.

Pouring the newly mixed slurry into a mould with the size of 40mm multiplied by 160mm, and placing the mould into a standard curing box; after the cementing material is hardened and solidified, the sample is transferred into a standard curing room after the mold is removed; and after curing for 7d and 28d, comparing the compressive strength of the mortar sample of the composite micro powder with the compressive strength of the cement reference sample, and measuring the activity index of the mortar sample of the composite micro powder.

The results of the performance tests on the proportions of different composite micro powder contents and cement references are shown in the following table 1.

TABLE 1 proportioning of different composite micropowder contents and performance parameters of cement reference mortar sample

As can be seen from table 1, the 28d activity index of the sample of formula 7 is the highest except for the cement reference, and formula 7 is selected as the formula of the composite micro powder by comprehensively considering the 7d strength and the 28d activity index.

The three solid waste raw materials are weighed according to the proportion of 40 wt% of steel slag, 40 wt% of casting residue and 20 wt% of water quenching slag in the composition of 7, a mixer is used for mixing uniformly to prepare the composite micro powder, and the composite micro powder in the proportion is adopted in the composite micro powder of the following examples 2-5.

Example 2

The preparation method of the gelled material of this example is as follows:

weighing 1000 parts of composite micro powder, 40 parts of gypsum, 1 part of carboxylic acid water reducing agent and 416 parts of water to prepare a cementing material of a sulfate excitation system with a water-to-gel ratio of 0.4;

fully stirring by using a JJ-5 type stirrer, and uniformly stirring all the components;

pouring the newly mixed slurry into a mould with the size of 40mm multiplied by 160mm, and placing the mould into a standard curing box;

after the cementing material is hardened and solidified, the sample is transferred into a standard curing room after the mold is removed;

and measuring the unconfined compressive strength of the test sample after curing to the target age.

Example 3

The preparation method of the gelled material of this example is as follows:

weighing 1000 parts of composite micro powder, 40 parts of sodium silicate, 1 part of carboxylic acid water reducing agent and 416 parts of water to prepare a cementing material of a silicate excitation system with a water-to-gel ratio of 0.4;

fully stirring by using a JJ-5 type stirrer, and uniformly stirring all the components;

pouring the newly mixed slurry into a mould with the size of 40mm multiplied by 160mm, and placing the mould into a standard curing box;

after the cementing material is hardened and solidified, the sample is transferred into a standard curing room after the mold is removed;

and measuring the unconfined compressive strength of the test sample after curing to the target age.

Example 4

The preparation method of the gelled material of this example is as follows:

weighing 1000 parts of composite micro powder, 40 parts of calcium aluminate, 1 part of carboxylic acid water reducing agent and 416 parts of water to prepare a cementing material of an aluminate excitation system with a water-to-gel ratio of 0.4;

fully stirring by using a JJ-5 type stirrer, and uniformly stirring all the components;

pouring the newly mixed slurry into a mould with the size of 40mm multiplied by 160mm, and placing the mould into a standard curing box;

after the cementing material is hardened and solidified, the sample is transferred into a standard curing room after the mold is removed;

and measuring the unconfined compressive strength of the test sample after curing to the target age.

Example 5

The preparation method of the gelled material of this example is as follows:

weighing 1000 parts of composite micro powder, 40 parts of composite exciting agent, 1 part of carboxylic acid water reducing agent and 416 parts of water to prepare a cementing material of a composite exciting system with a water-to-gel ratio of 0.4; the composite exciting agent is compounded by 40 wt% of sodium silicate, 40 wt% of sodium carbonate and 20 wt% of gypsum;

fully stirring by using a JJ-5 type stirrer, and uniformly stirring all the components;

pouring the newly mixed slurry into a mould with the size of 40mm multiplied by 160mm, and placing the mould into a standard curing box;

after the cementing material is hardened and solidified, the sample is transferred into a standard curing room after the mold is removed;

and measuring the unconfined compressive strength of the test sample after curing to the target age.

Comparative example 1

The preparation method of the gelled material of this example is as follows:

weighing 1000 parts of steel slag, 40 parts of cement clinker, 1 part of carboxylic acid water reducer and 416 parts of water to prepare a steel slag excited cementing material with a water-to-gel ratio of 0.4;

fully stirring by using a JJ-5 type stirrer, and uniformly stirring all the components;

pouring the newly mixed slurry into a mould with the size of 40mm multiplied by 160mm, and placing the mould into a standard curing box;

after the cementing material is hardened and solidified, the sample is transferred into a standard curing room after the mold is removed;

and measuring the unconfined compressive strength of the test sample after curing to the target age.

Comparative example 2

The preparation method of the gelled material of this example is as follows:

weighing 1000 parts of steel slag, 40 parts of quicklime, 1 part of carboxylic acid water reducing agent and 416 parts of water to prepare a steel slag activated cementing material with a water-to-gel ratio of 0.4;

fully stirring by using a JJ-5 type stirrer, and uniformly stirring all the components;

pouring the newly mixed slurry into a mould with the size of 40mm multiplied by 160mm, and placing the mould into a standard curing box;

after the cementing material is hardened and solidified, the sample is transferred into a standard curing room after the mold is removed;

and measuring the unconfined compressive strength of the test sample after curing to the target age.

Comparative example 3

The preparation method of the gelled material of this example is as follows:

weighing 1000 parts of casting residue, 40 parts of cement clinker, 1 part of carboxylic acid water reducer and 416 parts of water to prepare a clinker excited casting residue cementing material with a water-cement ratio of 0.4;

fully stirring by using a JJ-5 type stirrer, and uniformly stirring all the components;

pouring the newly mixed slurry into a mould with the size of 40mm multiplied by 160mm, and placing the mould into a standard curing box;

after the cementing material is hardened and solidified, the sample is transferred into a standard curing room after the mold is removed;

and measuring the unconfined compressive strength of the test sample after curing to the target age.

Comparative example 4

The preparation method of the gelled material of this example is as follows:

weighing 1000 parts of water-quenched slag, 40 parts of cement clinker, 1 part of carboxylic acid water reducer and 416 parts of water to prepare a clinker-excited water-quenched slag cementing material with a water-gel ratio of 0.4;

fully stirring by using a JJ-5 type stirrer, and uniformly stirring all the components;

pouring the newly mixed slurry into a mould with the size of 40mm multiplied by 160mm, and placing the mould into a standard curing box;

after the cementing material is hardened and solidified, the sample is transferred into a standard curing room after the mold is removed;

and measuring the unconfined compressive strength of the test sample after curing to the target age.

The compression strength of the cementing materials prepared in examples 2-5 and comparative examples 1-4 was tested, and the strength test was performed by using a measurement and control system of an EHC-60E full-automatic hydraulic testing machine.

The results are shown in Table 2, where the comparison of properties is compared to the 28d compressive strength of example 5, and the 28d compressive strength of the other examples and comparative examples is a percentage of the 28d compressive strength of example 5.

TABLE 2 results of property tests of the cement materials prepared in examples 2 to 5 and comparative examples 1 to 4

Serial number	3d compressive strength	7d compressive strength	28d compressive strength	Comparison of Performance
					Example 2	5.8	13.5	24.6	71％
Example 3	10.2	19.8	28.6	83％
					Example 4	4.6	14.5	16.3	47％
Example 5	12.8	28.6	34.5	100％
					Comparative example 1	5.7	13.7	20.2	59％
Comparative example 2	4.5	9.4	15.8	46％
					Comparative example 3	6.6	14.3	18.3	53％
Comparative example 4	8.3	18.6	22.6	66％

As can be seen from Table 2, the single industrial solid waste micro powder is excited by cement clinker, the effect of activating quicklime is limited, the activating effect of the cement clinker on steel slag, casting residue and water-quenched slag is greatly different, and the activating effect of the quicklime on the steel slag is weaker.

The activation effect of a single excitant is large along with the variety difference of the excitants, and the solid waste composite micro powder is synergistically excited by adopting a composite excitation system, so that the mechanical property of the cementing material can be obviously improved, and the excitation stability of the whole excitation system is improved.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.