CN114426405B - Potassium silicate and potassium carbonate excited slag-white mud cementing material and use method thereof - Google Patents
Potassium silicate and potassium carbonate excited slag-white mud cementing material and use method thereof Download PDFInfo
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- CN114426405B CN114426405B CN202210065423.6A CN202210065423A CN114426405B CN 114426405 B CN114426405 B CN 114426405B CN 202210065423 A CN202210065423 A CN 202210065423A CN 114426405 B CN114426405 B CN 114426405B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/1535—Mixtures thereof with other inorganic cementitious materials or other activators with alkali metal containing activators, e.g. sodium hydroxide or waterglass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention discloses a potash water glass and potassium carbonate excited slag-white mud cementing material and a using method thereof 2 CO 3 、K 2 SiO 3 The solution composition has mechanical performance and working performance meeting the requirement of common Portland cement and has better effect, and K is added 2 CO 3 Dissolving in additional water, stirring to colorless and transparent to obtain K 2 CO 3 Solution, mixing it with K 2 SiO 3 The solution is added into the slag and white mud composite precursor and stirred for use, and the construction is convenient. The potash water glass and potassium carbonate excited slag-white mud cementing material developed by the invention can provide a way for treating and digesting white mud, and if the potash water glass and potassium carbonate excited slag-white mud cementing material can be reasonably applied, the consumption of common portland cement can be reduced, and the white mud can also be consumed. Therefore, the invention has good economic, social and environmental benefits and is suitable for large-scale popularization and application.
Description
Technical Field
The invention belongs to the field of solid waste utilization, and mainly relates to a potash water glass and potassium carbonate excited slag-white mud cementing material and a using method thereof.
Background
White mud is an industrial by-product produced in the alkali recovery process of paper mills, and the industrial by-product is mainly treated by stacking or landfill. The main components of the white mud are calcium oxide and calcium carbonate, and the white mud contains a small amount of sodium sulfide, aluminum and iron compounds, dust impurities and the like, so that the white mud has the characteristics of high water content, high alkalinity and the like.
Potassium silicate has strong alkalinity, is a good choice as an alkali-activated cementing material activator, but is not natural, and the production process has certain pollution to the environment. In addition, alkali-activated cement made using potassium silicate as an activator has disadvantages of poor workability, excessively short setting time, large shrinkage deformation, etc., which hinders its practical use. However, the alkali-activated cementing material taking potassium silicate as an activator has the advantages of fast strength development and good mechanical property. Compared with sodium silicate and potassium silicate exciting agents, potassium carbonate is used as the exciting agent, and the strength development of alkali-activated cement is slower; but potassium carbonate is a natural mineral, is easier to obtain and has lower cost. The invention adopts potassium silicate and potassium carbonate as the composite excitant of the alkali-activated cementing material, which can play a role in making up for deficiencies and create good balance between performance and cost.
The proper treatment of the white mud is a major problem which needs to be solved urgently at present, and research and development of an alkali-activated composite cementing material which can be used for large-scale utilization of the white mud are needed, so that the problems of environmental pollution and land occupation caused by white mud accumulation or landfill are effectively solved. The alkali-slag cement preparation (patent No. CN 199410011000.3) introduces a method for preparing alkali-slag cementing material by using sodium water glass as an excitant, but the cost is higher by using water glass as a single excitant, and the environmental pollution is greater in the production process of the water glass. The invention adopts the composite potash water glass and the potassium carbonate as the composite excitant, takes the white mud as one of the important components of the alkali-activated cementing material, and has great significance for consuming the white mud and protecting the environment.
Disclosure of Invention
At present, the price of the materials gradually rises, the consumption speed is very quick, and the white mud is applied to the alkali slag cementing material, so that the usage amount of slag can be reduced, the white mud can be consumed, good energy-saving and environment-friendly effects can be achieved, and good economic benefits can be created. Compared with common portland cement, the alkali slag-white mud cementing material has the obvious advantages of energy conservation, environmental protection, high strength, low price and the like.
To achieve the above object, the present invention comprises:
a potash water glass and potassium carbonate excited slag-white mud cementing material comprises the following components in percentage by weight: the cementing material consists of a precursor and a composite excitant; the precursor consists of white mud and slag, and the composite excitant consists of K 2 CO 3 And K 2 SiO 3 Solution composition; wherein, the white mud is 5 to 35 percent, the slag is 65 to 95 percent, the sum of the weight percentages of the white mud and the slag is 100 percent, K 2 CO 3 The dosage of the white mud and the slag is 1 to 7 percent of the sum of the weight of the white mud and the slag, K 2 SiO 3 The dosage of the solution is 9 to 28 percent of the sum of the weight of the white mud and the S95 slag; k is 2 CO 3 Purity of 99%, K 2 SiO 3 The solid content of the solution is 40 to 50 weight percent, and the modulus is 1.0 to 2.0. When the gelled material is used, a proper amount of external water is added.
Further, the slag is S95 slag with a specific surface area of 400-450 m 2 Kg, density of 2.5-3.0 g/cm 3 (ii) a The specific surface area of the white mud is 200-250 m 2 Kg, density of 2.5-3.0 g/cm 3 。
Further, the use method of the potassium water glass and potassium carbonate excited slag-white mud cementing material comprises the following steps: the weight of the externally added water is 30-40% of the sum of the weight of the white mud and the weight of the slag, and the water in the water-glue ratio is composed of the externally added water and K 2 SiO 3 Water in solution; the water-to-glue ratio is 0.38-0.45; firstly, K is firstly 2 CO 3 Dissolving the weighed materials in additional water, and stirring the materials until the materials are colorless and transparent to obtain K 2 CO 3 A solution; secondly, uniformly mixing the white mud and the slag, then adding the standard sand, and then adding the K 2 CO 3 Immediately after the solution, K is added 2 SiO 3 Stirring and mixing the solution to form slurry, pouring the slurry into a mould and vibrating the slurry to be dense; covering a layer of preservative film on the surface of the mould after vibration compaction, placing for one day, then removing the mould, and finally, removing the mouldThe test block is placed at a relative humidity of more than or equal to 95wt% and a temperature of 20 +/-2 ℃ and is maintained for a corresponding age, and the flexural strength and the compressive strength of the test block are measured by referring to an experimental method of GB/T17671-1999 cement mortar strength test method.
Compared with the prior common alkali-activated cement, the invention has the following beneficial effects:
(1) Slag is one of high-quality precursors of the alkali-activated cementing material, but the price of the slag rises along with the wide use of the slag, and white mud is low in price, so that the cost can be saved when the white mud is applied to the alkali-activated cementing material. And the white mud is mainly accumulated or buried in a treatment mode, so that the environment is greatly influenced, and the white mud is applied to the alkali-activated cementing material, so that a new idea is provided for the treatment and utilization of the white mud, and the effect of protecting the environment is achieved.
(2) Alkali-activated slag cement made using potassium silicate as activator, soluble SiO in potassium silicate 3 2- The early reaction rate can be accelerated, and the problems of poor working performance, too short coagulation time, large shrinkage deformation and the like are presented, so that the application of the gel in practice is hindered; but the potassium silicate is adopted as the excitant, and the prepared alkali-activated cement also has the advantages of fast strength development, good mechanical property and the like. Compared with potassium silicate excitant, the Ca depolymerized from the precursor (slag and white mud) of alkali-activated cement prepared by adopting potassium carbonate as excitant 2+ CO supplied with the activator 3 2- React to form calcium carbonate and the like when CO is present 3 2- After the cement is completely consumed, the potassium hydroxide excites slag and white mud to generate hydration products such as C-A-S-H and hydrotalcite, so that the mechanical property of the cementing material in the early age is slowly developed, and alkali-excited cement which singly uses potassium carbonate as an exciting agent cannot be formed in one day, but the mechanical property in the later period is greatly improved. Potassium carbonate, as a naturally occurring mineral, is relatively easy to obtain and relatively low in cost. The two exciting agents are compounded, so that the defects of potassium water glass (too short in setting time) and potassium carbonate (slow in early-stage mechanical property development) are overcome, and the comprehensive performance of the alkali-activated cement is improved. If strong base (such as potassium hydroxide, sodium hydroxide, etc.) is used to replace potassium carbonate, then compoundingPotassium silicate, as an activator, also has the problem of too short a setting time and large shrinkage deformation.
(3) The slag activity is high, and the alkali-activated cementing material taking the slag as a precursor has good mechanical property; the white mud has low activity and is difficult to be directly used as a precursor for preparing the alkali-activated cementing material. However, the white mud is adopted to replace partial slag in the alkali slag cement precursor, and the white mud dispersed in the system can play a role of micro-aggregate, so that the prepared alkali-activated cementing material can meet the engineering application requirements.
Detailed Description
The present invention will be described in further detail with reference to specific experimental examples, which are provided for illustrating the present invention but not for limiting the scope of the present invention.
Example 1
In the embodiment of the invention, white mud, S95 slag and K are adopted 2 CO 3 、K 2 SiO 3 Solution (50% by weight solids, modulus 1.0). The weight of each component is as follows: according to the weight percentage; 95 percent of slag and 5 percent of white mud, the sum of the weight percentages of the slag and the white mud is 100 percent, K 2 CO 3 7% of the sum of the weight of white mud and S95 slag, K 2 SiO 3 The solution is 9 percent of the sum of the weight of the white mud and the S95 slag, and the weight of the externally added water is 40 percent of the sum of the weight of the white mud for papermaking and the weight of the S95 slag.
Firstly, K is firstly 2 CO 3 Dissolving the weighed materials in additional water, and stirring the materials until the materials are colorless and transparent to obtain K 2 CO 3 Adding white mud and S95 slag into a cement mortar stirring kettle, stirring for 1min, then adding standard sand with a mortar-to-mortar ratio of 1 2 CO 3 The solution is immediately added with K 2 SiO 3 Slowly stirring the solution for 1min to obtain slurry, rapidly stirring for 1min, initially setting for 42min and final setting for 61min, pouring into a container with size of 40 × 40 × 160mm 3 The mould is vibrated to be compact, a layer of preservative film is covered on the surface of the mould after the vibration to be compact, the mould is removed after the mould is placed for one day, and the test block is placed at the temperature of more than or equal to 95wt% of relative humidity and 20 +/-2 ℃ for maintenance to the corresponding age after the mould is removedAnd (4) period. The compressive strength and the flexural strength of the test block 28d are measured by referring to an experimental method of GB/T17671-1999 cement mortar strength test method, and the flexural strength is 4.7 MPa and the compressive strength is 55.9 MPa. The drying shrinkage at 28d was measured to be 1287. Mu. Epsilon. With reference to JC/T603-2004 "Cement mortar drying shrinkage test method".
Example 2
The invention adopts white mud, S95 slag and K 2 CO 3 、K 2 SiO 3 Solution (solids content 46wt%, modulus 1.5). The weight of each component is as follows: according to the weight percentage; 80 percent of slag and 20 percent of white mud, the sum of the weight percentages of the slag and the white mud is 100 percent, K 2 CO 3 5% of the sum of the weight of the white mud and the weight of the S95 slag, K 2 SiO 3 The solution is 14 percent of the sum of the weight of the white mud and the weight of the S95 slag, and the weight of the externally added water is 37 percent of the sum of the weight of the white mud and the weight of the S95 slag.
Firstly, K is firstly added 2 CO 3 Dissolving the weighed materials in additional water, and stirring the mixture until the mixture is colorless and transparent to obtain K 2 CO 3 Adding white mud and S95 slag into a cement mortar stirring kettle, stirring for 1min, then adding standard sand with a mortar-to-mortar ratio of 1 2 CO 3 The solution is immediately added with K 2 SiO 3 Slowly stirring the solution for 1min to obtain slurry, rapidly stirring for 1min with initial setting time of 23min and final setting time of 37min, pouring into a container with size of 40 × 40 × 160mm 3 The mould is vibrated to be compact, a layer of preservative film is covered on the surface of the mould after the vibration to be compact, the mould is removed after the mould is placed for one day, and the test block is placed at the temperature of more than or equal to 95wt% of relative humidity and 20 +/-2 ℃ for maintenance to the corresponding age after the mould is removed. The compressive strength and the flexural strength of the test block 28d are measured by referring to an experimental method of GB/T17671-1999 cement mortar strength test method, and the flexural strength is 5.5 MPa and the compressive strength is 60.5 MPa. The drying shrinkage at 28d was measured to be 1579. Mu. Epsilon. According to JC/T603-2004 "Cement mortar Dry shrinkage test method".
Example 3
In the embodiment of the invention, white mud, S95 slag and K are adopted 2 CO 3 、K 2 SiO 3 Solution (solid)The content was 40wt%, and the modulus was 2.0). The weight of each component is as follows: according to the weight percentage, the slag is 65 percent, the white mud is 35 percent, the sum of the weight percentage of the slag and the white mud is 100 percent, K 2 CO 3 Is 1 percent of the sum of the weight of white mud and S95 slag, K 2 SiO 3 The solution is 28 percent of the sum of the weight of the white mud and the weight of the S95 slag, and the weight of the externally added water is 30 percent of the sum of the weight of the white mud and the weight of the S95 slag.
Firstly, K is firstly 2 CO 3 Dissolving the weighed materials in additional water, and stirring the materials until the materials are colorless and transparent to obtain K 2 CO 3 Adding white mud and S95 slag into a cement mortar stirring pot, stirring for 1min, then adding standard sand with a glue-sand ratio of 1 2 CO 3 The solution is immediately added with K 2 SiO 3 Slowly stirring the solution for 1min to obtain slurry, rapidly stirring for 1min, initially setting for 15min and final setting for 30min, pouring into a container with size of 40 × 40 × 160mm 3 The mould is vibrated to be compact, a layer of preservative film is covered on the surface of the mould after the vibration to be compact, the mould is removed after the mould is placed for one day, and the test block is placed at the temperature of more than or equal to 95wt% of relative humidity and 20 +/-2 ℃ for maintenance to the corresponding age after the mould is removed. The compressive strength and the flexural strength of the test block 28d are measured by referring to an experimental method of GB/T17671-1999 cement mortar strength test method, and the flexural strength is 5.8 MPa and the compressive strength is 68.5 MPa. The drying shrinkage at 28d was 1852. Mu. Epsilon. As measured by reference to JC/T603-2004 "Cement mortar drying shrinkage test method".
Comparative example 1 (without K) 2 CO 3 ）
In this comparative example, white mud, S95 slag, K were used 2 SiO 3 Solution (40% solids, 2.0 modulus). The weight of each component is as follows: according to the weight percentage, the slag is 65 percent, the white mud is 35 percent, the sum of the weight percentage of the slag and the white mud is 100 percent, K 2 SiO 3 The solution is 29 percent of the sum of the weight of the white mud and the weight of the S95 slag, and the weight of the external water is 30 percent of the sum of the weight of the white mud and the weight of the S95 slag.
Adding white mud and S95 slag into a cement mortar stirring pot, stirring for 1min, then adding standard sand with a mortar-to-mortar ratio of 1,then adding K 2 SiO 3 Mixing the solution and water, stirring slowly for 1min to obtain slurry, stirring rapidly for 1min, initial setting time of 10min and final setting time of 22min, pouring into a container with size of 40 × 40 × 160mm 3 The mould is vibrated to be compact, a layer of preservative film is covered on the surface of the mould after the vibration to be compact, the mould is removed after the mould is placed for one day, and the test block is maintained to the corresponding age period at the relative humidity of more than or equal to 95wt% and the temperature of 20 +/-2 ℃. The compressive strength and the flexural strength of the test block 28d are measured by referring to an experimental method of GB/T17671-1999 cement mortar strength test method, and the flexural strength is 5.9 MPa and the compressive strength is 69.4 MPa. The drying shrinkage at 28d was 2468. Mu. Epsilon. As determined by reference to JC/T603-2004 "Cement mortar drying shrinkage test method".
Comparative example 2 (without K) 2 SiO 3 Solutions)
In this comparative example, white mud, S95 slag, K were used 2 CO 3 . The weight of each component is as follows: according to the weight percentage; 80 percent of slag and 20 percent of white mud, the sum of the weight percentages of the slag and the white mud is 100 percent, K 2 CO 3 10 percent of the sum of the weight of the white mud and the weight of the S95 slag, and 40 percent of the weight of the externally added water.
Firstly, K is firstly 2 CO 3 Dissolving the weighed materials in additional water, and stirring the materials until the materials are colorless and transparent to obtain K 2 CO 3 Adding white mud and S95 slag into a cement mortar stirring kettle, stirring for 1min, then adding standard sand with a mortar-to-mortar ratio of 1 2 CO 3 Slowly stirring the solution for 1min to obtain slurry, rapidly stirring for 1min, pouring into a container with a size of 40 × 40 × 160mm 3 The mould is vibrated to be compact, a layer of preservative film is covered on the surface of the mould after the vibration is compact, the mould can not be detached after the mould is placed for one day, and the test block can not be formed.
Comparative example 3 (using only Na having a modulus of 2.0) 2 SiO 3 Solutions, i.e. sodium water glass)
In this comparative example, white mud, S95 slag, na were used 2 SiO 3 Solution (40% solids, modulus 2.0). The weight of each component is as follows: in terms of weight percent65 percent of slag and 35 percent of white mud, the sum of the weight percentages of the slag and the white mud is 100 percent, and the modulus of the white mud is Na with 2.0 2 SiO 3 The solution is 29 percent of the sum of the weight of the white mud and the weight of the S95 slag, and the weight of the externally added water is 30 percent of the sum of the weight of the white mud and the weight of the S95 slag.
Adding the white mud and the S95 slag into a cement mortar stirring pot, stirring for 1min, then adding standard sand with a glue-sand ratio of 1 2 SiO 3 Mixing the solution and water, stirring slowly for 1min to obtain slurry, stirring rapidly for 1min, initial setting time of 13min and final setting time of 28min, pouring into a container with size of 40 × 40 × 160mm 3 The mould is vibrated to be compact, a layer of preservative film is covered on the surface of the mould after the vibration to be compact, the mould is removed after the mould is placed for one day, and the test block is placed at the temperature of more than or equal to 95wt% of relative humidity and 20 +/-2 ℃ for maintenance to the corresponding age after the mould is removed. The compressive strength and the flexural strength of the test block 28d are measured by referring to an experimental method of GB/T17671-1999 cement mortar strength test method, and the flexural strength is 5.7 MPa and the compressive strength is 67.7 MPa. The drying shrinkage at 28d was 2250. Mu. Epsilon. As determined by reference to JC/T603-2004 "Cement mortar drying shrinkage test method".
Comparative example 1 use K 2 SiO 3 Solutions (without K) 2 CO 3 ) The alkali-activated papermaking white mud-slag cementing material 28d has the breaking strength of 5.9 MPa, the compressive strength of 69.4 MPa, and the dry shrinkage of 28d of 2468 mu epsilon. Comparative example 3 in which Na was used 2 SiO 3 Solutions (without K) 2 CO 3 ) The alkali-activated papermaking white mud-slag gelled material 28d has a flexural strength of 5.7 MPa, a compressive strength of 67.7MPa, and a dry shrinkage of 2250 mu epsilon of 28d. Example 3 of the present invention employs K 2 SiO 3 Solutions and K 2 CO 3 As the composite activator, the 28d flexural strength was 5.8 MPa, the compressive strength was 68.5 MPa, and the dry shrinkage at 28d was 1852. Mu. Epsilon. Although the compressive strength and the flexural strength of the composite material are not much different, the composite excitant ensures certain strength, reduces shrinkage and saves cost.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (3)
1. A potash water glass and potassium carbonate excited slag-white mud cementing material is characterized in that: the cementing material consists of a precursor and a composite excitant; the precursor consists of papermaking white mud and slag, wherein the white mud accounts for 5-35 wt%, the slag accounts for 65-95 wt%, the sum of the two is 100 wt%, and the composite excitant consists of K 2 CO 3 Solids and K 2 SiO 3 Solution composition; k is 2 CO 3 The dosage of the white mud and the slag is 1 to 7 percent of the sum of the weight of the white mud and the slag, K 2 SiO 3 The dosage of the solution is 9 to 28 percent of the sum of the weight of the white mud and the weight of the slag; when in use, a proper amount of water is added;
the slag is S95 slag with a specific surface area of 400-450 m 2 Kg, density of 2.5-3.0 g/cm 3 ；
The specific surface area of the white mud is 200-250 m 2 Kg, density of 2.5-3.0 g/cm 3 ；
K 2 CO 3 The purity is 99%, and when in use, the K is dissolved in additional water and stirred until the K is colorless and uniform to obtain the K 2 CO 3 A solution;
K 2 SiO 3 the solid content of the solution is 40 to 50 weight percent, and the modulus is 1.0 to 2.0.
2. The method of using a potash water glass and potassium carbonate activated slag-lime mud cementitious material as claimed in claim 1, wherein: the method comprises the following steps:
(1) The weight of the added water is 30 to 40 percent of the sum of the weight of the white mud and the weight of the slag, and the water-glue ratio is 0.38 to 0.45; firstly, K is firstly 2 CO 3 Dissolving the weighed materials in additional water, and stirring the materials until the materials are colorless and transparent to obtain K 2 CO 3 A solution;
(2) Adding white mud and slag into a cement mortar stirring pot, stirring for 1min, adding standard sand, stirring for 1min, and adding K 2 CO 3 Immediately after the solution, K is added 2 SiO 3 The solution is stirred slowly for 1min to be mixed into slurry,and finally, quickly stirring for 1min, pouring the mixture into a mould, vibrating and compacting, covering a layer of preservative film on the surface of the mould after vibrating and compacting, placing for one day, then removing the mould, and placing the test block at a temperature of which the relative humidity is more than or equal to 95wt% and the temperature is 20 +/-2 ℃ for curing.
3. Use according to claim 2, characterized in that: the water in the water-glue ratio is added with water and K 2 SiO 3 Water in solution.
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