Method for testing activity of silicon-aluminum solid waste raw material

Abstract

The invention relates to the technical field of building materials and solid waste recycling, and discloses a silicon-aluminum solid waste raw material activity testing method which comprises the following steps: mixing a silicon-aluminum solid waste raw material with hydrochloric acid, reacting to remove impurities, filtering, washing to be neutral, drying, and verifying the impurity removal effect by using a rapid X-ray fluorescence spectrometry to obtain a treated sample; carrying out heating reaction on the treated sample and a sodium hydroxide solution, and filtering; adding an acid-base indicator into the filtrate, titrating with a hydrochloric acid standard solution, calculating the consumption of sodium hydroxide according to the titration consumption, and evaluating the activity of the raw materials; the method comprises the following steps: preparing mixed samples with different mass ratios from active minerals and inert minerals, measuring the titration result, drawing an active phase composition-titration result standard curve, and predicting the active phase content according to the titration result of a raw material to be measured. According to the method, chemical simulation and rapid titration are combined, so that quantitative evaluation on the activity of the solid waste is completed within several hours, and a traditional lagged evaluation mode depending on 28-day intensity experiments is thoroughly changed.

Description

Technical Field

[0001] This invention relates to the field of building materials and solid waste resource utilization technology, and in particular to a method for testing the activity of silicon-aluminum solid waste raw materials. Background Technology

[0002] In the fields of green building materials and solid waste resource utilization, accurately assessing the chemical activity of siliceous aluminous solid wastes such as coal gangue and calcined kaolin tailings is a key step in achieving their high-value utilization. Currently, the industry mainly relies on several representative methods to evaluate the activity of raw materials, but these methods all have their limitations. The strength index method, as the most widely used evaluation method, requires preparing mortar test blocks and measuring their compressive strength after 28 days or longer to indirectly characterize activity. The entire testing cycle is lengthy and cannot meet the urgent needs of modern industrial production for rapid screening of raw materials and immediate process adjustments. Another classic method, the Chappelle test, assesses activity by measuring the material's lime-fixing capacity. Although the testing speed is improved, the high-temperature, high-calcium reaction environment used differs significantly from the actual system, and the reaction products easily coat unreacted lime during the test, making it difficult to guarantee the accuracy and repeatability of the results. In recent years, the R... 3 The testing method characterizes the activity by measuring the exothermic reaction of materials in alkaline solutions, which is closer to the actual reaction process in terms of mechanism. However, this method relies on sophisticated isothermal calorimetry equipment, which is costly and requires highly specialized operation, thus limiting its widespread application in routine industrial quality inspection.

[0003] In summary, existing technologies have significant shortcomings in terms of testing efficiency, environmental relevance, equipment dependence, and result accuracy, which hinder the refined management of raw material quality during the solid waste resource utilization process. Therefore, there is an urgent need in this field to develop an activity evaluation method that can balance testing speed, ease of operation, and result accuracy, in order to fill the gaps in existing technologies and promote the advancement of solid waste resource utilization technologies. Summary of the Invention

[0004] The purpose of this invention is to provide a method for testing the activity of silicon-aluminum solid waste raw materials, which effectively solves the problem of long testing cycles in existing activity testing methods and provides technical support for the efficient utilization of silicon-aluminum solid waste.

[0005] To achieve the above objectives, the following technical solution is adopted: A method for testing the activity of silica-alumina solid waste raw materials includes the following steps: The silicon-aluminate solid waste raw material was mixed with hydrochloric acid to remove impurities. After filtration and washing until neutral, it was dried, and the removal effect of impurity ions was verified by rapid X-ray fluorescence spectroscopy to obtain the treated sample. The treated sample was reacted with sodium hydroxide solution under heating conditions and then filtered to obtain the filtrate. An acid-base indicator was added to the filtrate, and titration was performed with a standard hydrochloric acid solution. The amount of sodium hydroxide consumed was calculated based on the amount consumed in the titration, and the activity of the raw materials was evaluated. Mixed samples with different mass ratios of active and inert minerals were prepared, and the titration results of the mixed samples were determined. A standard curve of active phase composition-titering results was plotted, and the active phase content of the raw material to be tested was predicted based on the titration results of the raw material to be tested.

[0006] Furthermore, the concentration of hydrochloric acid used in the mixing reaction with the silicon-aluminum solid waste raw materials is 1~3 mol / L, the liquid-to-solid ratio is 90~110:1, the reaction temperature is set to 35~45℃, and the reaction time is 25~35 minutes.

[0007] Furthermore, the method of filtration and washing to neutrality includes: washing with deionized water, testing the filter residue with pH test paper, until the filter residue is neutral.

[0008] Furthermore, the treated sample is reacted with sodium hydroxide solution under heating conditions and then filtered to obtain filtrate. During this process, the concentration of sodium hydroxide solution is 2-4 mol / L, the liquid-to-solid ratio is 90-110:1, the reaction temperature is 55-65℃, and the reaction time is 3.5-4.5 hours.

[0009] Furthermore, after reacting the treated sample with sodium hydroxide solution under heating conditions, it is immediately filtered to ensure that the aluminosilicate components generated in the reaction are completely precipitated in the filtrate.

[0010] Furthermore, the acid-base indicator is a neutral red-methylene blue mixed indicator.

[0011] Furthermore, the concentration of the hydrochloric acid standard solution is 0.05~0.15 mol / L.

[0012] Furthermore, the formula for calculating the amount of sodium hydroxide consumed is as follows: In the formula, The concentration of the sodium hydroxide solution; The sodium hydroxide solution system; The concentration of hydrochloric acid; : The volume of hydrochloric acid titrated; The mass of the titrated solution; The relative molecular mass of sodium hydroxide; Total filtrate mass; : The quality of SCM.

[0013] Furthermore, the active mineral is metakaolinite, and the inert mineral is quartz.

[0014] Furthermore, the mass ratio of the active phase to the inert phase in the mixed sample includes 3:0, 2:1, 1.5:1.5, 1:2, and 0:3.

[0015] The beneficial effects of this invention are reflected in: (1) Compared with the traditional strength index method, which has a testing cycle of up to 28 days or even longer, this invention shortens the entire testing process to within a few hours, enabling rapid diagnosis of the activity of raw materials and greatly meeting the needs of industrial production for rapid screening of raw materials and real-time adjustment of processes.

[0016] (2) By establishing a standard curve of active phase composition-titration results, this invention can not only qualitatively compare the activity levels of different raw materials, but also semi-quantitatively predict the approximate content of active phase in raw materials, providing a more guiding basis for the graded utilization of solid waste and the development of high-value products. Attached Figure Description

[0017] Figure 1 A flowchart of an activity testing method for silicon-aluminate solid waste raw materials provided in an embodiment of the present invention; Figure 2 The activity standard curve provided for the embodiments of the present invention; Figure 3 A quantitative XRD pattern of calcined coal gangue provided in an embodiment of the present invention; Figure 4 A quantitative XRD pattern of calcined kaolin tailings provided in an embodiment of the present invention; Figure 5 Correlation analysis graph for activity testing provided in embodiments of the present invention. Detailed Implementation

[0018] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0019] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0020] Example 1: This invention provides a method for testing the activity of silicon-aluminum solid waste raw materials. This method is particularly suitable for the rapid and accurate evaluation of the activity of silicon-aluminum solid waste raw materials, replacing the traditional, lengthy strength tests. Figure 1 The diagram shows a flowchart of the activity testing method for this silicon-aluminum solid waste raw material. The activity testing method specifically includes the following steps S10-S40.

[0021] S10: The silicon-aluminum solid waste raw material is mixed with hydrochloric acid to remove impurities. After filtration and washing until neutral, it is dried, and the removal effect of impurity ions is verified by rapid X-ray fluorescence spectroscopy to obtain the treated sample.

[0022] The purpose of step S10 is to remove impurities from the raw materials that could interfere with subsequent activity testing, ensuring that the test results accurately reflect the activity of the target aluminosilicate active phase. Specifically, aluminosilicate solid waste (such as coal gangue and kaolin tailings) often contains impurities such as carbonates (e.g., CaCO3) and iron oxides (Fe2O3). Carbonates react violently with hydrochloric acid. Taking CaCO3 as an example, the calcium chloride produced by its reaction with hydrochloric acid is soluble in water and can be removed by subsequent filtration and washing. If not removed, carbonates will consume sodium hydroxide in the subsequent alkaline reaction, leading to a higher measured activity value. Iron oxides can react with hydrochloric acid to produce soluble ferric chloride, thus being removed. The presence of the iron phase may also affect the purity of the reaction system and the determination of the subsequent titration endpoint. Washing to neutral ensures that all acidic substances and soluble reaction products are completely washed away, preventing them from entering the subsequent alkaline reaction step and affecting the alkalinity of the reaction system. Finally, rapid X-ray fluorescence spectrometry was used for rapid and semi-quantitative component analysis to verify whether interfering impurity ions such as CaO and Fe2O3 had been effectively removed, so as to provide a pure sample with a silicon-aluminum phase as the main component for subsequent steps and ensure the specificity of the test.

[0023] In some embodiments, the concentration of hydrochloric acid used in the mixing reaction with the silicon-aluminum solid waste raw material is 1~3 mol / L, the liquid-to-solid ratio is 90~110:1, the reaction temperature is set to 35~45℃, and the reaction time is 25~35 minutes.

[0024] In a preferred embodiment, the concentration of hydrochloric acid in step S10 is 2 mol / L, the liquid-to-solid ratio is 100:1, the reaction temperature is 40 ℃, and the reaction time is 30 minutes.

[0025] In some embodiments, the method of filtration and washing to neutrality includes: washing with deionized water, testing the filter residue with pH test paper, until the filter residue is neutral.

[0026] S20: The treated sample is reacted with sodium hydroxide solution under heating conditions and then filtered to obtain the filtrate.

[0027] The purpose of step S20 is to allow the active silicon-aluminum phase in the raw material to react with and dissolve in the solution under an alkaline environment. The active silicon-aluminum phase mainly consists of amorphous SiO2 and Al2O3.

[0028] In a heated alkaline solution, amorphous silicon and aluminum oxides undergo depolymerization and dissolution. Taking silicon dioxide and aluminum oxide as examples, the specific chemical reaction formulas are as follows: Dissolution of silicon dioxide: SiO2 (amorphous) + 2NaOH → Na2SiO3 + H2O; Dissolution of aluminum oxide: Al2O3 (amorphous) + 2NaOH → 2NaAlO2 + H2O.

[0029] Ultimately, the amorphous silicon and aluminum oxides enter the solution in the form of sodium silicate, sodium aluminate, etc. Meanwhile, the crystalline phase reacts very slowly at this mild alkaline concentration and temperature, becoming almost insoluble, thus achieving the separation of the active and inert phases.

[0030] Heating conditions can be selected according to actual conditions. For example, the reaction temperature can be increased to 60°C and a moderate alkali concentration, such as 3 mol / L, can be used to accelerate the reaction and allow the active phase to dissolve fully in a short time (such as 4 hours), while avoiding excessive erosion of the inert crystalline phase.

[0031] In some embodiments, the treated sample is reacted with sodium hydroxide solution under heating conditions and then filtered to obtain filtrate. During this process, the concentration of the sodium hydroxide solution is 2-4 mol / L, the liquid-to-solid ratio is 90-110:1, the reaction temperature is 55-65°C, and the reaction time is 3.5-4.5 hours.

[0032] In a preferred embodiment, the sodium hydroxide solution concentration in step S20 is 3 mol / L, the liquid-to-solid ratio is 100:1, the reaction temperature is 60 °C, and the reaction time is 4 hours.

[0033] In some embodiments, hot rapid filtration is used in step S20 to ensure that the aluminosilicate components generated in the reaction are completely precipitated in the filtrate, avoiding precipitation caused by cooling and ensuring the accuracy of subsequent titration results.

[0034] S30: Add acid-base indicator to the filtrate, titrate with standard hydrochloric acid solution, calculate sodium hydroxide consumption based on titration volume, and evaluate the activity of raw materials.

[0035] Step S30 is used to quantitatively determine the amount of residual alkali that was not consumed in step S20. The amount of alkali consumed in the reaction with the active component is indirectly calculated, thereby quantitatively evaluating the activity of the raw materials.

[0036] In some embodiments, in step S30, 10 g of the filtrate is accurately measured and titrated with a standard hydrochloric acid solution. Finally, based on the titration data, the amount of sodium hydroxide consumed is calculated using a formula as follows: In the formula, The concentration of the sodium hydroxide solution is 3 mol / L. The system of sodium hydroxide solution, in L; The concentration of hydrochloric acid is 0.1 mol / L. : Volume of hydrochloric acid titrated, in L; : The mass of the titration solution, 10 g; The relative molecular mass of sodium hydroxide is 40. Total filtrate mass, g; : Mass of SCM, g.

[0037] In some embodiments, the indicator is selected as a neutral red-methylene blue mixed indicator. This mixed indicator is used to accurately determine the titration endpoint. This mixed indicator exhibits a sharp color change from green to purple-red across the acidic to alkaline range, indicating the completion point of the neutralization reaction more clearly than a single indicator, thus improving titration accuracy.

[0038] In some embodiments, in step S30, the concentration of the hydrochloric acid standard solution is 0.05~0.15 mol / L.

[0039] In a preferred embodiment, the concentration of the hydrochloric acid standard solution in step S30 is 0.1 mol / L.

[0040] S40: Prepare mixed samples with different mass ratios of active and inert minerals, determine the titration results of the mixed samples, plot the active phase composition-titer result standard curve, and predict the active phase content of the raw material to be tested based on the titration results of the raw material to be tested.

[0041] The purpose of step S40 is to correlate the measured NaOH consumption with the physical content of the active phase in the material, achieving a quantitative prediction from the level of activity to the amount of content. Specifically, a series of standard samples are artificially prepared using known proportions of active minerals and pure inert minerals. This constructs a benchmark system ranging from 0% to 100% active content. The standard samples with the known composition are subjected to full-step tests from S10 to S30 to obtain the NaOH consumption for each sample. A scatter plot is drawn with the active phase content as the x-axis and the NaOH consumption as the y-axis, and a curve is fitted. This curve can be represented by a linear or nonlinear regression equation; this curve is the active phase composition-titration result standard curve.

[0042] For any unknown silica-alumina solid waste, simply determine its NaOH consumption and then substitute it into the fitted active phase composition-titration result standard curve to inversely calculate the approximate content of the active phase in the unknown sample. This achieves the transformation from simple chemical titration data to meaningful physical composition parameters, providing a basis for solid waste classification and formulation design.

[0043] In some embodiments, the active phase mineral in step S40 is metakaolinite, and the inert phase is quartz.

[0044] In some embodiments, the mass ratio of the active phase to the inert phase in the mixture of step S40 is 3:0, 2:1, 1.5:1.5, 1:2, and 0:3, respectively.

[0045] Therefore, the method proposed in this invention, through a combination of chemical simulation and rapid titration, achieves quantitative assessment of solid waste activity within hours, completely changing the traditional lagging evaluation model that relies on a 28-day intensity test. This method has the advantages of simple operation, reliable results, and good repeatability, and can be directly used to guide the classification, formulation design, and production process optimization of solid waste materials. It is of great significance for promoting the efficient resource utilization of bulk solid waste and the low-carbon development of the building materials industry.

[0046] The feasibility and advancement of the present invention will be explained in detail below based on the activity testing method for silicon-aluminum solid waste raw materials provided in Example 1, combined with specific experimental data, through the following three examples (Examples 2 to 4) and a comparative example 1.

[0047] Example 2: Five mixtures were prepared by mixing metakaolin and quartz with hydrochloric acid according to Table 1, and activity standard curves were plotted.

[0048] The oxide compositions of metakaolin and quartz are shown in Table 2.

[0049] Table 1. Composition of the mixture of metakaolin and quartz

[0050] Table 2. Main chemical composition of metakaolin and quartz

[0051] (1) The mixture was mixed with 300 g of 2 mol / L hydrochloric acid and reacted at 40 °C for 30 minutes. After filtration and washing until the pH paper of the filter residue was neutral, it was dried and the removal effect of impurity ions was verified by rapid X-ray fluorescence spectroscopy. The results are shown in Table 3.

[0052] Table 3. Main chemical composition after reaction

[0053] (2) The treated sample was reacted with 300 g of 3 mol / L sodium hydroxide solution at 60 °C for 4 hours and then filtered while hot.

[0054] (3) Accurately measure 10 g of the filtrate and add it to a neutral red-methylene blue mixed indicator. Titrate with 0.1 mol / L hydrochloric acid standard solution, record the amount of hydrochloric acid titrated, and calculate the amount of sodium hydroxide consumed according to the formula. The calculation formula is as follows: In the formula, The concentration of the sodium hydroxide solution is 3 mol / L. The system of sodium hydroxide solution, in L; The concentration of hydrochloric acid is 0.1 mol / L. : Volume of hydrochloric acid titrated, in L; : The mass of the titration solution, 10 g; The relative molecular mass of sodium hydroxide is 40. Total filtrate mass, g; : Mass of SCM, g.

[0055] The consumption of sodium hydroxide in each group is shown in Table 4: Table 4 Sodium hydroxide consumption

[0056] (4) Plot a standard curve of active phase composition and titration results with metakaolin (MK) as the x-axis and sodium hydroxide consumption as the y-axis, as follows: Figure 2 As shown, the active phase content can be further predicted based on the titration results of the raw material to be tested.

[0057] Example 3: Calcined coal gangue was used as the active material to be tested for rapid activity. The oxide composition of calcined coal gangue is shown in Table 5.

[0058] Table 5 Oxide content of calcined coal gangue

[0059] (1) The mixture was mixed with 300 g of 2 mol / L hydrochloric acid and reacted at 40 °C for 30 minutes. After filtration and washing until the pH paper of the filter residue was neutral, it was dried and the removal effect of impurity ions was verified by rapid X-ray fluorescence spectroscopy. The results are shown in Table 6.

[0060] Table 6 Oxide content after reaction

[0061] (2) The treated sample was reacted with 300 g of 3 mol / L sodium hydroxide solution at 60 °C for 4 hours and then filtered while hot.

[0062] (3) Accurately measure 10 g of the filtrate and add it to a neutral red-methylene blue mixed indicator. Titrate with 0.1 mol / L hydrochloric acid standard solution, record the amount of hydrochloric acid titrated, and calculate the amount of sodium hydroxide consumed according to the formula. The calculation formula is as follows: In the formula, The concentration of the sodium hydroxide solution is 3 mol / L. The system of sodium hydroxide solution, in L; The concentration of hydrochloric acid is 0.1 mol / L. : Volume of hydrochloric acid titrated, in L; : The mass of the titration solution, 10 g; The relative molecular mass of sodium hydroxide is 40. Total filtrate mass, g; Mass of SCM, in grams; The consumption of sodium hydroxide was 0.5751 g NaOH / g SCM.

[0063] (4) Based on the regression formula y=0.475+0.0028x, the prediction is y=0.575 and x=35.71.

[0064] (5) Actual quantitative testing using XRD quantitative testing methods, such as... Figure 2 As shown, the amorphous phase content accounts for 39.3%, with an error of approximately 3.59.

[0065] Example 4: Calcined kaolin tailings were used as the test material for rapid activity testing. The oxide composition of the calcined kaolin tailings is shown in Table 7.

[0066] Table 7 Oxide content of calcined kaolin tailings

[0067] (1) Calcined kaolin tailings were mixed with 300 g of 2 mol / L hydrochloric acid and reacted at 40°C for 30 minutes. After filtration and washing until the pH paper of the filter residue was neutral, the residue was dried and the removal effect of impurity ions was verified by rapid X-ray fluorescence spectroscopy. The results are shown in Table 8.

[0068] Table 8 Oxide content after reaction

[0069] (2) The treated sample was reacted with 300 g of 3 mol / L sodium hydroxide solution at 60°C for 4 hours and then filtered while hot.

[0070] (3) Accurately measure 10 g of the filtrate and add it to a neutral red-methylene blue mixed indicator. Titrate with 0.1 mol / L hydrochloric acid standard solution, record the amount of hydrochloric acid titrated, and calculate the amount of sodium hydroxide consumed according to the formula. The calculation formula is as follows: In the formula, The concentration of the sodium hydroxide solution is 3 mol / L. The system of sodium hydroxide solution, in L; The concentration of hydrochloric acid is 0.1 mol / L. : Volume of hydrochloric acid titrated, in L; : The mass of the titration solution, 10 g; The relative molecular mass of sodium hydroxide is 40. Total filtrate mass, g; Mass of SCM, in grams; The consumption of sodium hydroxide was 0.6847 g NaOH / g SCM.

[0071] (4) Based on the regression formula y=0.475+0.0028x, the prediction is y=0.6847, x=74.89.

[0072] (5) Actual quantitative verification using XRD quantitative testing methods, such as... Figure 3 As shown, the amorphous phase content accounts for 68.7%, with an error of approximately 6.19.

[0073] Comparative Example 1: The pozzolanic activity of coal gangue and calcined kaolin tailings was tested using the strength index method. The mix proportions and compressive strengths of the strength measurement specimens are shown in Table 9.

[0074] Table 9 Mortar Specimen Mix Proportions

[0075] The specimen dimensions were 40×40×40 mm. Strength testing was conducted after 28 days of curing. The strength index was calculated using the following formula: SAI= ×100% The activity of calcined coal gangue and calcined kaolin tailings were 53.07% and 80.76%, respectively. For example... Figure 4 As shown, the activity testing method established in this invention has a high degree of consistency with the above results, with a correlation coefficient R. 2 =1. This indicates that the activity testing method of the present invention has a good correlation with the currently recognized strength activity testing methods in the field. Furthermore, compared to the traditional method's testing cycle of up to 28 days, the present invention can complete the test in just 5 hours, significantly improving detection efficiency.

[0076] The above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the patent protection scope of the present invention should be defined by the claims.

Claims

1. A method for testing the activity of silicon-aluminum solid waste raw materials, characterized in that, Includes the following steps: The silicon-aluminate solid waste raw material was mixed with hydrochloric acid to remove impurities. After filtration and washing until neutral, it was dried, and the removal effect of impurity ions was verified by rapid X-ray fluorescence spectroscopy to obtain the treated sample. The treated sample was reacted with sodium hydroxide solution under heating conditions and then filtered to obtain the filtrate. An acid-base indicator was added to the filtrate, and titration was performed with a standard hydrochloric acid solution. The amount of sodium hydroxide consumed was calculated based on the amount consumed in the titration, and the activity of the raw materials was evaluated. Mixed samples with different mass ratios of active and inert minerals were prepared, and the titration results of the mixed samples were determined. A standard curve of active phase composition-titering results was plotted, and the active phase content of the raw material to be tested was predicted based on the titration results of the raw material to be tested.

2. The method for testing the activity of silicon-aluminate solid waste raw materials according to claim 1, characterized in that, The concentration of hydrochloric acid used in the mixed reaction with the silicon-aluminum solid waste raw materials is 1~3 mol / L, the liquid-to-solid ratio is 90~110:1, the reaction temperature is set to 35~45℃, and the reaction time is 25~35 minutes.

3. The method for testing the activity of silicon-aluminate solid waste raw materials according to claim 1, characterized in that, The method of filtration and washing to neutrality includes: washing with deionized water, testing the filter residue with pH test paper, until the filter residue is neutral.

4. The method for testing the activity of silicon-aluminate solid waste raw materials according to claim 1, characterized in that, The treated sample is reacted with sodium hydroxide solution under heating conditions and then filtered to obtain the filtrate. During this process, the concentration of the sodium hydroxide solution is 2-4 mol / L, the liquid-to-solid ratio is 90-110:1, the reaction temperature is 55-65℃, and the reaction time is 3.5-4.5 hours.

5. The method for testing the activity of silicon-aluminate solid waste raw materials according to claim 1, characterized in that, After reacting the treated sample with sodium hydroxide solution under heating conditions, the sample was immediately filtered to ensure that the aluminosilicate components generated by the reaction were completely precipitated into the filtrate.

6. The method for testing the activity of silicon-aluminate solid waste raw materials according to claim 1, characterized in that, The acid-base indicator is a neutral red-methylene blue mixed indicator.

7. The method for testing the activity of silicon-aluminate solid waste raw materials according to claim 1, characterized in that, The concentration of the hydrochloric acid standard solution is 0.05~0.15 mol / L.

8. The method for testing the activity of silicon-aluminate solid waste raw materials according to claim 1, characterized in that, The formula for calculating the sodium hydroxide consumption is as follows: In the formula, The concentration of the sodium hydroxide solution; The sodium hydroxide solution system; The concentration of hydrochloric acid; : The volume of hydrochloric acid titrated; The mass of the titrated solution; The relative molecular mass of sodium hydroxide; Total filtrate mass; : The quality of SCM.

9. The method for testing the activity of silicon-aluminate solid waste raw materials according to claim 1, characterized in that, The active mineral is metakaolin, and the inert mineral is quartz.

10. The method for testing the activity of silicon-aluminate solid waste raw materials according to claim 1, characterized in that, The mass ratio of the active phase to the inert phase in the mixed sample includes 3:0, 2:1, 1.5:1.5, 1:2, and 0:3.

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