A delayed setting type alkali-activated high calcium silico-aluminate composite cement and a preparation method thereof

Abstract

The application relates to a retarder type alkali-activated high calcium silicic-alumina composite cement and a preparation method thereof, and relates to the field of building materials. The retarder type alkali-activated high calcium silicic-alumina composite cement comprises main components and function regulation components. The main components are measured as follows in percentage by mass: (1) high calcium silicic-alumina raw material 55-80%, (2) alkali-activated raw material 20-45%, and the sum of the two is 100%. In addition, the function regulation components are additionally added according to the mass of the high calcium silicic-alumina raw material in the main components, and the dosages of the components are as follows: (1) slow-release agent 2-8%, (2) temperature rise inhibitor 4-12%, and (3) anti-coagulant 2-10%. The preparation steps comprise: ① raw material grinding and ② mixing. The application realizes effective regulation of the setting time of the alkali-activated high calcium silicic-alumina composite cement and the synergistic development of the strength, and has a wide application prospect.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of building materials, and particularly relates to a preparation method of a retardant alkali-activated high calcium-silicon-aluminum composite cement. BACKGROUND

[0002] The alkali-activated silicon-aluminum composite cement is prepared by using silicon-aluminum materials as raw materials and through the depolymerization-polymerization reaction of minerals in the silicon-aluminum materials under the action of alkali-activated raw materials, and has a three-dimensional network structure matrix. The material has excellent properties such as high strength, high temperature resistance, acid and alkali corrosion resistance, and heavy metal solidification, and has a wide application prospect in the fields of fire prevention and heat insulation, building, heavy metal solidification, and nuclear waste sealing.

[0003] At present, the common representative alkali-activated silicon-aluminum composite cement mainly includes alkali-activated low calcium-silicon-aluminum composite cement represented by alkali-activated fly ash and alkali-activated high calcium-silicon-aluminum composite cement represented by alkali-activated slag. However, the setting and hardening of the alkali-activated high calcium-silicon-aluminum composite cement is very rapid, which leads to poor construction performance and difficult popularization and application.

[0004] Therefore, it is of great significance to realize effective regulation and control of the setting and hardening of the alkali-activated high calcium-silicon-aluminum composite cement and to improve the construction performance of the alkali-activated high calcium-silicon-aluminum composite cement. SUMMARY

[0005] In view of the above problems, the application provides a preparation method of a retardant alkali-activated high calcium-silicon-aluminum composite cement. In the application, high calcium-silicon-aluminum materials are used as raw materials, and through the mutual synergistic effect of functional regulation components, the concentration of calcium ions in the slurry during the reaction process is regulated and controlled, the reaction temperature rise is reduced, the precipitation rate of the reaction product is delayed, and the setting and hardening time of the matrix is prolonged. Meanwhile, with the change of the alkalinity in the reaction system, the calcium ions captured by the release agent in the functional regulation components can be released to participate in the construction of the cementation network, so as to ensure the development of the mechanical properties of the matrix. Through the technical scheme provided by the application, the problem of rapid setting and hardening of the alkali-activated high calcium-silicon-aluminum composite cement can be effectively solved, and the strength development of the alkali-activated high calcium-silicon-aluminum composite cement is also considered. The specific content of the application is as follows:

[0006] The retardant alkali-activated high calcium-silicon-aluminum composite cement comprises main components and functional regulation components. The main components are measured as follows in percentage by mass: (1) high calcium-silicon-aluminum raw material 55%-80%, (2) alkali-activated raw material 20%-45%, and the sum of the two is 100%. In addition, the functional regulation components are additionally added according to the mass of the high calcium-silicon-aluminum raw material in the main components as 100%, and the dosages of the functional regulation components are as follows: (1) release agent 2%-8%, (2) temperature rise inhibitor 4%-12%, and (3) anti-setting agent 2%-10%.

[0007] The high calcium-silica-alumina raw material in the main component is one or two of blast furnace slag, fly ash and red mud, and the further preferred chemical composition of the high calcium-silica-alumina raw material has a CaO content greater than 8% and a sum of SiO2 and Al2O3 content greater than 30%.

[0008] The alkaline excitation raw material in the main component is one or two of choline, tetramethylammonium hydroxide and tetrapropylammonium hydroxide.

[0009] The slow-release agent in the functional regulation component is one or two of diisopropyl xanthate disulfide, dimethyl ethylenediaminetetraacetate and zinc sodium ethylenediaminetetraacetate.

[0010] The temperature rise inhibitor in the functional regulation component is one or two of neopentyl glycol bisacetylacetate and ethyl 2-(methylamino)acetate.

[0011] The anticoagulant in the functional regulation component is one or two of diethyl pyrophosphoramide, triethyl citrate and zinc dialkyldithiocarbamate.

[0012] The preparation steps of the set-retarding type alkaline excitation high calcium-silica-alumina composite cement are as follows:

[0013] ① Raw material grinding: the high calcium-silica-alumina raw material in the main component is placed in a ball mill for grinding according to the mass percentage, so that the surface area of the obtained powder is controlled at 350m 2 / kg-500m 2 / kg.

[0014] ② Mixing: the powder obtained in step ① is placed in a mixer, and the alkaline excitation raw material is first added and mixed and stirred for 30 min according to the mass percentage. Then the functional regulation component is additionally added, and the addition sequence is: first add the slow-release agent and stir for 15 min, then add the temperature rise inhibitor and stir for 15 min, and finally add the anticoagulant and continue to stir for 30 min, to obtain the set-retarding type alkaline excitation high calcium-silica-alumina composite cement.

[0015] The technical features of the present application are that: compared with the alkaline-activated raw material used in the common alkali-activated silico-aluminate composite cement, the present application innovatively uses organic alkali to replace inorganic alkali as the alkaline-activated raw material. At the same time, in view of the problem that the setting and hardening of the alkali-activated high-calcium silico-aluminate composite cement is rapid, which leads to poor construction performance, on the basis of the action of the alkaline-activated raw material, the present application uses the synergistic effect of the functional regulating components to realize the effective regulation of the setting time of the alkali-activated high-calcium silico-aluminate composite cement, and takes into account the development of its strength. The alkali-activated high-calcium silico-aluminate composite cement prepared by the present application has a final setting time of about 3.7 hours, a 3-day compressive strength of 78.5 MPa, and a 28-day compressive strength of 134.5 MPa. Specifically, the synergistic regulation mechanism of the functional regulating components on the performance of the alkali-activated high-calcium silico-aluminate composite cement is as follows: the slow-release agent used can capture calcium ions in the slurry during the reaction process, regulate the content of calcium ions in the liquid phase, and reduce the reaction rate; with the change of the alkalinity of the system during the reaction process, the calcium ions captured by the slow-release agent can be released to participate in the construction of the gel network, ensuring the development of the matrix strength. At the same time, the temperature rise inhibitor can delay the rapid rise of the system temperature, reduce the degree of reaction, and prolong the reaction process of the slurry. Further, on the basis of the above, the anti-setting agent can increase the solubility product of the reaction products in the liquid phase, reduce the precipitation rate of the reaction products, and prolong the setting and hardening time of the matrix. In summary, through the activation of the alkaline-activated raw material, and the synergistic effect of the slow-release agent, the temperature rise inhibitor and the anti-setting agent, the problem of rapid setting and hardening of the alkali-activated high-calcium silico-aluminate composite cement is solved, and the development of its strength is taken into account.

[0016] The present application provides a method for preparing a retarding alkali-activated high-calcium silico-aluminate composite cement, which effectively regulates the setting time of the alkali-activated high-calcium silico-aluminate composite cement while taking into account the development of its strength, enriches the application scenarios of the alkali-activated high-calcium silico-aluminate composite cement, and promotes the transition from preparation technology research to application technology research. In addition, the popularization and application of the present application technology is of great significance to improving the utilization rate of high-calcium silico-aluminate industrial and mining solid waste, and promoting the synergistic effect of pollution reduction and carbon reduction. DETAILED DESCRIPTION

[0017] To make the technical means, innovative features, purposes and effects achieved by the present application easy to understand, the present application is further described below.

[0018] The embodiments described herein are illustrative of specific embodiments of the application and are explained in detail for the purpose of illustrating the inventive concept. They are not to be construed as limiting the present application to the embodiments described herein or to the scope of the application. In addition to the embodiments described herein, those skilled in the art will be able, based upon the disclosure provided herein, to devise further embodiments which represent obvious substitutions and modifications of the described embodiments. Such embodiments, including obvious substitutions and modifications, are encompassed by the technical solutions disclosed in the claims and the specification of the present application.

[0019] The present application provides a retarder type alkali-activated high calcium silicate-alumina composite cement, which comprises a main component and a function regulating component. The main component is measured by mass percentage as follows: high calcium silicate-alumina raw material 55%-80%, alkali-activated raw material 20%-45%, and the sum of the two is 100%. The high calcium silicate-alumina raw material is one or two of blast furnace slag, fly ash, and red mud, with CaO content greater than 8% and the sum of SiO2 and Al2O3 content greater than 30%; the alkali-activated raw material is one or two of choline, tetramethylammonium hydroxide, and tetrapropylammonium hydroxide. In addition, the function regulating component is additionally added according to the mass of the high calcium silicate-alumina raw material in the main component, and the dosages of the function regulating components are respectively 2%-8% of the slow-release agent, 4%-12% of the temperature rise inhibitor, and 2%-10% of the anti-coagulant.

[0020] The slow-release agent in the function regulating component is one or two of diisopropyl xanthate disulfide, dimethyl ethylenediamine tetraacetate, and zinc sodium ethylenediamine tetraacetate; the temperature rise inhibitor in the function regulating component is one or two of neopentyl glycol bisacetylacetate and 2-(methylamino) ethyl acetate; and the anti-coagulant in the function regulating component is one or two of diethyl pyrophosphoramide, triethyl citrate, and zinc dialkyldithiocarbamate.

[0021] The preparation method of the above-mentioned retarder type alkali-activated high calcium silicate-alumina composite cement comprises the following steps:

[0022] Raw material grinding: the high calcium silicate-alumina raw material in the main component is placed in a ball mill for grinding, so that the surface area of the obtained powder is controlled at 350m 2 / kg-500m 2 / kg.

[0023] Mixing: the ground powder is placed in a mixer, and the alkali-activated raw material is first added and mixed and stirred for 30 min. Then, according to the mass of the high calcium silicate-alumina raw material in the main component, the function regulating component is additionally added according to the specified mass percentage, and the addition sequence is as follows: first, the slow-release agent is added and stirred for 15 min, then the temperature rise inhibitor is added and stirred for 15 min, and finally the anti-coagulant is added and stirred for 30 min, to obtain the retarder type alkali-activated high calcium silicate-alumina composite cement.

[0024] To further embody the effect brought by the present application, the present application is further explained in detail in combination with specific cases. The high calcium siliceous and aluminous raw material and the alkaline excitation raw material in the main components of the listed cases are respectively represented by blast furnace slag and tetramethylammonium hydroxide, and the sum of the two is 100%. The main chemical components of the blast furnace slag used in the present application are in the range of CaO content 33%-38%, SiO2 content 40%-45%, Al2O3 content 16%-20%, MgO content 1%-3%, Fe2O3 content 2%-4%, MnO content 0.5%-1%, and other unavoidable impurities content 0.8%-2%. The functional control components are represented by zinc sodium ethylenediaminetetraacetate, neopentyl glycol bisacetylacetate and zinc dialkyldithiocarbamate, which are added extra according to the mass of the blast furnace slag as 100%. The specific details and technical effects of each case are described as follows.

[0025] Example 1

[0026] The raw materials in the main components are weighed according to the mass percentage, wherein the functional control components are added extra according to the mass of the high calcium siliceous and aluminous raw material component in the main components as 100%, and the details are as follows:

[0027] Main components: blast furnace slag 55%, tetramethylammonium hydroxide 45%, and the sum of the two is 100%. The CaO content of the blast furnace slag used in the present application is 34.2%, the SiO2 content is 40.6%, the Al2O3 content is 17.8%, and the sum of the SiO2 and Al2O3 contents is 58.4%.

[0028] Functional control components (added extra according to the mass of the high calcium siliceous and aluminous raw material component in the main components as 100%): zinc sodium ethylenediaminetetraacetate 2%, neopentyl glycol bisacetylacetate 4%, and zinc dialkyldithiocarbamate 2%.

[0029] ① Raw material grinding: 5 kg of high calcium siliceous and aluminous raw material blast furnace slag is accurately weighed and placed in a ball mill for grinding to obtain blast furnace slag powder with a specific surface area of 350 m 2 / kg-380 m 2 / kg.

[0030] ② Mixing: the blast furnace slag powder obtained in step ① is placed in a mixer according to the mass percentage, and the alkaline excitation raw material tetramethylammonium hydroxide is first added and mixed and stirred for 30 min; then the functional control components are added extra according to the mass of the high calcium siliceous and aluminous raw material blast furnace slag in the main components as 100%, and the addition sequence is: zinc sodium ethylenediaminetetraacetate is first added and stirred for 15 min, then neopentyl glycol bisacetylacetate is added and stirred for 15 min, and finally zinc dialkyldithiocarbamate is added and continuously stirred for 30 min, to obtain the said set retarding type alkaline excitation high calcium siliceous and aluminous composite cement.

[0031] Example 2

[0032] The raw materials in the main component were weighed by mass percentage, wherein the functional regulation component was additionally added based on the mass of the high calcium silicate alumina raw material component in the main component being 100%, and the details were as follows:

[0033] The main component: blast furnace slag 64%, tetramethylammonium hydroxide 36%, and the sum of the two was 100%. The CaO content of the blast furnace slag used in this example was 35.6%, the SiO2 content was 41.2%, the Al2O3 content was 18.3%, and the sum of the SiO2 and Al2O3 contents was 59.5%.

[0034] The functional regulation component (added additionally based on the mass of the high calcium silicate alumina raw material component in the main component being 100%): zinc sodium ethylenediaminetetraacetate 4%, neopentyl glycol bisacetylacetate 6%, and zinc dialkyldithiocarbamate 5%.

[0035] ① Raw material grinding: 5 kg of high calcium silicate alumina raw material blast furnace slag was accurately weighed and placed in a ball mill for grinding to obtain blast furnace slag powder with a specific surface area of 380 m 2 / kg-430 m 2 / kg.

[0036] ② Mixing: the blast furnace slag powder obtained in step ① was placed in a mixer according to mass percentage, and the alkaline activation raw material tetramethylammonium hydroxide was first added and mixed and stirred for 30 min; then the functional regulation component was added additionally based on the mass of the high calcium silicate alumina raw material blast furnace slag in the main component being 100%, and the addition sequence was: zinc sodium ethylenediaminetetraacetate was first added and stirred for 15 min, then neopentyl glycol bisacetylacetate was added and stirred for 15 min, and finally zinc dialkyldithiocarbamate was added and continued to be stirred for 30 min, to obtain the said setting type alkaline activated high calcium silicate alumina composite cement.

[0037] Example 3

[0038] The raw materials in the main component were weighed by mass percentage, wherein the functional regulation component was additionally added based on the mass of the high calcium silicate alumina raw material component in the main component being 100%, and the details were as follows:

[0039] The main component: blast furnace slag 73%, tetramethylammonium hydroxide 27%, and the sum of the two was 100%. The CaO content of the blast furnace slag used in this example was 36.2%, the SiO2 content was 42.3%, the Al2O3 content was 19.1%, and the sum of the SiO2 and Al2O3 contents was 61.4%.

[0040] Functional control components (extra added, based on 100% of the mass of the high calcium silicate and alumina raw material component in the main component): zinc sodium ethylenediaminetetraacetate 6%, neopentyl glycol bisacetylacetate 9%, zinc dialkyldithiocarbamate 8%.

[0041] ① Raw material grinding: 5 kg of high calcium silicate and alumina raw material blast furnace slag was accurately weighed and ground in a ball mill to obtain blast furnace slag powder with a specific surface area of 430 m 2 / kg-460 m 2 / kg.

[0042] ② Mixing: the blast furnace slag powder obtained in step ① was placed in a mixer according to the mass percentage, and the alkaline activator raw material tetramethylammonium hydroxide was first added and mixed for 30 min; then, based on 100% of the mass of the high calcium silicate and alumina raw material blast furnace slag in the main component, the functional control components were added in the following order: zinc sodium ethylenediaminetetraacetate was first added and stirred for 15 min, then neopentyl glycol bisacetylacetate was added and stirred for 15 min, and finally zinc dialkyldithiocarbamate was added and stirred for 30 min, to obtain the said set-type alkaline-activated high calcium silicate and alumina composite cement.

[0043] Example 4

[0044] According to the mass percentage, the main component was weighed, and the functional control component was extra added based on 100% of the mass of the high calcium silicate and alumina raw material component in the main component, as follows:

[0045] Main component: blast furnace slag 80%, tetramethylammonium hydroxide 20%, and the sum of the two was 100%. The blast furnace slag used in this example had a CaO content of 36.6%, a SiO2 content of 43.6%, an Al2O3 content of 19.5%, and a sum of SiO2 and Al2O3 content of 63.1%.

[0046] Functional control components (extra added, based on 100% of the mass of the high calcium silicate and alumina raw material component in the main component): zinc sodium ethylenediaminetetraacetate 8%, neopentyl glycol bisacetylacetate 12%, zinc dialkyldithiocarbamate 10%.

[0047] ① Raw material grinding: 5 kg of high calcium silicate and alumina raw material blast furnace slag was accurately weighed and ground in a ball mill to obtain blast furnace slag powder with a specific surface area of 460 m 2 / kg-500 m 2 / kg.

[0048] ②Mixing: the blast furnace slag powder obtained in step ① is placed in a mixer, and the basic activator raw material tetramethylammonium hydroxide is first added and mixed and stirred for 30 min; then, according to the mass of the main component, i.e., the blast furnace slag of high calcium alumino-silicate raw material being 100%, the functional control component is additionally added, and the addition sequence is as follows: zinc sodium ethylenediaminetetraacetate is first added and stirred for 15 min, then neopentyl glycol bisacetylacetate is added and stirred for 15 min, and finally, zinc dialkyldithiocarbamate is added and stirred for 30 min, to obtain the set retarding type alkali-activated high calcium alumino-silicate composite cement.

[0049] Comparative Example 1

[0050] In the present comparative example, no slow-release agent zinc sodium ethylenediaminetetraacetate is added, and the rest is the same as in Example 1.

[0051] Comparative Example 2

[0052] In the present comparative example, no temperature rise inhibitor neopentyl glycol bisacetylacetate is added, and the rest is the same as in Example 2.

[0053] Comparative Example 3

[0054] In the present comparative example, no anticoagulant zinc dialkyldithiocarbamate is added, and the rest is the same as in Example 3.

[0055] Comparative Example 4

[0056] In the present comparative example, no slow-release agent zinc sodium ethylenediaminetetraacetate and no temperature rise inhibitor neopentyl glycol bisacetylacetate are added, and the rest is the same as in Example 4.

[0057] Comparative Example 5

[0058] In the present comparative example, no functional control component is added, and the rest is the same as in Example 1.

[0059] Comparative Example 6

[0060] In the present comparative example, the basic activator raw material tetramethylammonium hydroxide is replaced by a mixture of 45% inorganic basic activator raw material [NaOH + Na2SiO3], the modulus of the water glass in the mixture is 1.0, and the alkali content is 8%, and the rest is the same as in Example 1.

[0061] Comparative Example 7

[0062] In the present comparative example, the basic activator raw material tetramethylammonium hydroxide is replaced by a mixture of 45% inorganic basic activator raw material [NaOH + Na2SiO3], the modulus of the water glass in the mixture is 1.0, the alkali content is 8%, and no functional control component is added, and the rest is the same as in Example 1.

[0063] The setting time of each example and comparative example was tested according to GB / T 1346-2019 "Cement Standard Consistency, Setting Time, and Stability Test Method"; the fluidity of each example and comparative example was tested according to GB / T 8077-2012 "Concrete Admixture Homogeneity Test Method"; and the 3-day and 28-day compressive strength of each example and comparative example was tested according to GB / T 17671-2021 "Cement Mortar Strength Test Method (ISO Method)". The test results of each example and comparative example are shown in Table 1.

[0064] Table 1 Performance indicators of the alkali-activated high calcium silico-aluminate composite cement

[0065]

[0066]

[0067] As can be seen from the results in Table 1, Comparative Example 7 is a common alkali-activated high calcium silico-aluminate composite cement prepared by using inorganic alkali as the alkali-activated raw material, and its setting and hardening rate is very fast. In comparison, in the present application, organic alkali is used as the alkali-activated raw material, and under the synergistic action of the functional regulation components, the setting time of the alkali-activated high calcium silico-aluminate composite cement in Examples 1-4 is significantly prolonged, and the fluidity of the fresh paste and the compressive strength of the hardened paste are improved and increased to different degrees, achieving effective regulation of the setting time of the alkali-activated high calcium silico-aluminate composite cement, and taking into account the development of its strength.

[0068] Compared with Example 1, Comparative Example 1 lacks a slow-release agent in the functional regulation components, and the calcium ion concentration in the paste liquid phase is high during the reaction, resulting in a fast reaction rate and a shortened setting time, but the fluidity of the fresh paste and the strength of the hardened paste are not greatly affected.

[0069] Compared with Example 2, Comparative Example 2 lacks a temperature rise inhibitor in the functional regulation components, and the system temperature rises quickly during the reaction, resulting in a relatively fast reaction rate, a shortened setting time, and a slight decrease in strength, but the absence of the temperature rise inhibitor has little effect on the fluidity of the paste.

[0070] Compared with Example 3, Comparative Example 3 lacks an anticoagulant in the functional regulation components, and the precipitation rate of the reaction products in the system is relatively fast, resulting in a shortened setting and hardening time of the paste, but the fluidity of the fresh paste and the strength of the hardened paste are not greatly affected.

[0071] Compared with Example 4, Comparative Example 4 lacks a slow-release agent and a temperature rise inhibitor in the functional regulation components, and even under the action of the anticoagulant, the setting and hardening rate of the paste is relatively fast. At the same time, due to the absence of the above functional components, the fluidity of the fresh paste and the strength of the hardened paste are reduced to different degrees.

[0072] Compared with Example 1, the calcium ion concentration in the system of Comparative Example 5 is higher due to the absence of the functional regulation component, the temperature rise is high, the precipitation rate of the reaction product is also fast, and then the setting and hardening time of the slurry is significantly shortened. The fluidity of the fresh slurry and the strength of the hardened slurry are also reduced.

[0073] Compared with Example 1, the calcium ion concentration in the system of Comparative Example 5 is higher due to the absence of the functional regulation component, the temperature rise is high, the precipitation rate of the reaction product is also fast, and then the setting and hardening time of the slurry is significantly shortened. The fluidity of the fresh slurry and the strength of the hardened slurry are also reduced.

[0074] The above examples are only used to explain the present application and do not constitute a limitation on the scope of the claims. Other alternative means that can be thought of by those skilled in the art based on the content of the present application should be within the protection scope of the claims of the present application.

Claims

1. A retarded, alkali-activated, high-calcium silicate-alumina composite cement, characterized in that, It includes main components and functional regulating components; the main components are measured by mass percentage as follows: (1) high calcium silicate alumina raw material 55%-80%, (2) alkaline activating raw material 20%-45%, the sum of the two is 100%; in addition, based on the mass of high calcium silicate alumina raw material in the main components being 100%, additional functional regulating components are added, and the dosage of each functional regulating component is as follows: (1) slow-release agent 2%-8%, (2) temperature rise inhibitor 4%-12%, (3) anticoagulant 2%-10%; The high-calcium silicate-alumina raw material is one or two of blast furnace slag, fly ash, and red mud. The chemical composition of the high-calcium silicate-alumina raw material contains more than 8% CaO by mass and more than 30% SiO2 and Al2O3 by mass. The alkaline activating raw material is one or two of choline, tetramethylammonium hydroxide, and tetrapropylammonium hydroxide. The sustained-release agent in the functional regulating component is one or two of diisopropyl xanthate disulfide, dimethyl ethylenediaminetetraacetate, and sodium zinc ethylenediaminetetraacetate; the temperature rise inhibitor in the functional regulating component is one or two of neopentyl glycol diacetate and ethyl 2-(methylamino)acetate; and the anticoagulant in the functional regulating component is one or two of diethyl pyrophosphoramide, triethyl citrate, and zinc dialkyl dithiocarbamate.

2. A method for preparing a retarded alkali-activated high-calcium silicate-alumina composite cement as described in claim 1, characterized in that... The preparation steps are as follows: Raw material grinding: The high-calcium silicate alumina raw material, which is the main component, is placed in a ball mill and ground according to the mass percentage, so that the surface area of ​​the resulting powder is controlled at 350m². 2 / kg-500m 2 / kg; Mixing: Place the powder obtained in step ① into a mixer, add alkaline activating raw materials according to the mass percentage and mix for 30 minutes; then add functional regulating components in the following order: first add the slow-release agent and mix for 15 minutes, then add the temperature rise inhibitor and mix for 15 minutes, and finally add the anti-coagulant and continue mixing for 30 minutes to obtain the slow-setting alkali-activated high-calcium silicate alumina composite cement.

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