bonding materials, activatable materials, dry-mix mortars and bonding mortar compositions

Abstract

A bonding mortar made from water and dry-mixed mortar, wherein the dry-mixed mortar contains a binder, the active components of which include fly ash and silicate cement, wherein the fly ash constitutes up to 80% by weight of the active components. The binder also includes an activator comprising at least one chloride of an alkali metal or alkaline earth metal and a formate of an alkali metal or alkaline earth metal. This dry-mixed mortar uses fly ash to replace most of the cement while achieving comparable or even better performance. Furthermore, due to the significant reduction in cement usage, it significantly reduces energy consumption and carbon emissions in product production, while the use of waste reduces environmental pollution.

Description

Adhesive materials, stimulating materials, dry-mixed mortars and adhesive mortars Technical Field

[0001] The present invention relates to the field of building materials, in particular to bonding mortar, in particular to bonding materials, stimulating materials, dry-mixed mortar and bonding mortar slurry. Background Art

[0002] In the building materials industry, adhesives are widely used, for example, in bonding boards and tiles. Typically, these adhesives are compositions primarily composed of cement. For example, cement can account for as much as 80-90% by weight, or even more.

[0003] However, since the preparation of cement consumes a lot of energy and causes huge pollution, for the purpose of emission reduction and environmental protection, the industry has been hoping to reduce the use of cement in bonding materials, or even completely replace cement.

[0004] Fly ash, the fine dust collected from the flue gases after coal combustion, is a major solid waste emitted by coal-fired power plants. With the development of the power industry, fly ash emissions from coal-fired power plants have increased annually, becoming one of the largest industrial waste streams in my country. Untreated large amounts of fly ash generate dust, polluting the atmosphere. Discharge into waterways can cause siltation, and the toxic chemicals contained in it can pose a threat to humans and organisms. However, fly ash can be used as a resource, such as as a concrete admixture.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to use fly ash to replace cement in bonding mortar, especially to replace most of the cement in traditional cement-based ceramic tile adhesives.

[0007] To this end, according to a first aspect of the present invention, a bonding material comprises the following components in parts by weight: 25-40 parts of an active material, wherein the active material comprises fly ash and Portland cement; and up to 2.5 parts of an activator, wherein the activator comprises at least one of a chloride of an alkali metal or an alkaline earth metal and a formate of an alkali metal or an alkaline earth metal.

[0008] Furthermore, based on the total weight of the active material, the active material comprises at most 80% fly ash, or at most 70% fly ash, or at most 60% fly ash, with the remainder being Portland cement.

[0009] The weight of the alkali metal or alkaline earth metal formate is at most 1 part or at most 0.75 parts, and the weight of the alkali metal or alkaline earth metal chloride is at most 1.5 parts. Furthermore, the ratio of the weight of the alkali metal or alkaline earth metal formate to the weight of the alkali metal or alkaline earth metal chloride is 1:0.5-6.

[0010] Wherein, the formate of the alkali metal or alkaline earth metal is sodium formate, calcium formate, potassium formate, magnesium formate or lithium formate, and the chloride of the alkali metal or alkaline earth metal is lithium chloride, magnesium chloride, calcium chloride, potassium chloride or sodium chloride.

[0011] In one embodiment, the activator comprises an alkali metal or alkaline earth metal formate, and further comprises an alkali metal or alkaline earth metal hydroxide, wherein the weight portion of the alkali metal or alkaline earth metal hydroxide is at most 2 parts, or at most 1 part, or at most 0.5 parts, and the alkali metal or alkaline earth metal hydroxide is sodium hydroxide, calcium hydroxide, potassium hydroxide, magnesium hydroxide, or lithium hydroxide.

[0012] In one embodiment, the activator comprises an alkali metal or alkaline earth metal formate, and further comprises an alkali metal or alkaline earth metal tripolyphosphate, wherein the alkali metal or alkaline earth metal tripolyphosphate is present in an amount of at most 0.5 parts, and the alkali metal or alkaline earth metal tripolyphosphate is selected from sodium tripolyphosphate, lithium tripolyphosphate, potassium tripolyphosphate, and calcium tripolyphosphate.

[0013] According to another aspect of the present invention, an excitation material for an inorganic active ingredient comprises a combination of alkali metal or alkaline earth metal formates, alkali metal or alkaline earth metal chlorides, alkali metal or alkaline earth metal hydroxides and alkali metal or alkaline earth metal tripolyphosphates.

[0014] Further, the excitation material is a combination of an alkali metal or alkaline earth metal formate and an alkali metal or alkaline earth metal chloride, an alkali metal or alkaline earth metal hydroxide, or an alkali metal or alkaline earth metal tripolyphosphate; or the excitation material is a combination of an alkali metal or alkaline earth metal formate, an alkali metal or alkaline earth metal chloride, and an alkali metal or alkaline earth metal hydroxide; or the excitation material is a combination of an alkali metal or alkaline earth metal formate, an alkali metal or alkaline earth metal chloride, and an alkali metal or alkaline earth metal tripolyphosphate; or the excitation material is a combination of an alkali metal or alkaline earth metal formate, an alkali metal or alkaline earth metal hydroxide, and an alkali metal or alkaline earth metal tripolyphosphate.

[0015] The weight of the alkali metal or alkaline earth metal formate is at most 1 part, or at most 0.75 parts, and the weight of the alkali metal or alkaline earth metal chloride is at most 1.5 parts. The ratio of the weight of the alkali metal or alkaline earth metal formate to the weight of the alkali metal or alkaline earth metal chloride is 1:0.5-6.

[0016] Wherein, the weight portion of the hydroxide of the alkali metal or alkaline earth metal is at most 2 parts, or at most 1 part, or at most 0.5 parts.

[0017] Wherein, the weight portion of the alkali metal or alkaline earth metal tripolyphosphate is at most 0.5 parts.

[0018] The formate of the alkali metal or alkaline earth metal is sodium formate, calcium formate, potassium formate, magnesium formate or lithium formate, and the chloride of the alkali metal or alkaline earth metal is lithium chloride, magnesium chloride, calcium chloride, potassium chloride or sodium chloride.

[0019] The hydroxide of the alkali metal or alkaline earth metal is sodium hydroxide, calcium hydroxide, potassium hydroxide, magnesium hydroxide or lithium hydroxide.

[0020] The tripolyphosphate of the alkali metal or alkaline earth metal is sodium tripolyphosphate, lithium tripolyphosphate, potassium tripolyphosphate, or calcium tripolyphosphate.

[0021] According to yet another aspect of the present invention, a dry-mix mortar comprises the following components, measured in parts by weight: an active material, 25-40 parts, wherein the active material comprises fly ash and Portland cement; an activator, up to 2.5 parts, wherein the activator comprises at least one of an alkali metal or alkaline earth metal chloride and an alkali metal or alkaline earth metal format; a filler, 0-20 parts; an aggregate, 45-65 parts; and an additive, 0-5 parts.

[0022] Wherein, based on the total weight of the active material, the active material comprises at most 80% fly ash, or at most 70% fly ash, or at most 60% fly ash, and the remainder is Portland cement.

[0023] The weight portion of the alkali metal or alkaline earth metal formate is at most 1 part, or at most 0.75 parts, and the weight portion of the alkali metal or alkaline earth metal chloride is at most 1.5 parts. Furthermore, the ratio of the weight of the alkali metal or alkaline earth metal formate to the weight of the alkali metal or alkaline earth metal chloride is 1:0.5-6. The alkali metal or alkaline earth metal formate is sodium formate, calcium formate, potassium formate, magnesium formate, or lithium formate, and the alkali metal or alkaline earth metal chloride is lithium chloride, magnesium chloride, calcium chloride, potassium chloride, or sodium chloride.

[0024] Furthermore, the activator comprises an alkali metal or alkaline earth metal formate and an alkali metal or alkaline earth metal hydroxide. The weight portion of the alkali metal or alkaline earth metal hydroxide is at most 2 parts, or at most 1 part, or at most 0.5 parts. The alkali metal or alkaline earth metal hydroxide is sodium hydroxide, calcium hydroxide, potassium hydroxide, magnesium hydroxide, or lithium hydroxide.

[0025] Furthermore, the activator comprises an alkali metal or alkaline earth metal formate and an alkali metal or alkaline earth metal tripolyphosphate, wherein the weight portion of the alkali metal or alkaline earth metal tripolyphosphate is at most 0.5 parts. The alkali metal or alkaline earth metal tripolyphosphate is selected from sodium tripolyphosphate, lithium tripolyphosphate, potassium tripolyphosphate, and calcium tripolyphosphate.

[0026] The additive comprises redispersible latex powder, cellulose ether or a combination thereof, wherein the weight portion of the cellulose ether is at most 0.5 parts, and the weight portion of the redispersible latex powder is at most 3 parts.

[0027] According to another aspect of the present invention, a bonding mortar slurry includes the aforementioned dry-mixed mortar and water, wherein the weight ratio of the dry-mixed mortar to the water is 100:20-100:25.

[0028] In the technical solution of the present invention, fly ash is used to replace most of the cement, which has equivalent or even better performance. Moreover, since the amount of cement used is greatly reduced, the energy consumption and carbon emissions of product production are significantly reduced. At the same time, the use of waste can reduce pollution to the environment. DETAILED DESCRIPTION

[0029] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0030] In this application, the term "at most" used to define the amount of a component means that the amount of the component is less than or equal to the specified value. "Parts by weight" refers to weight units with the same unit and the same quantity. For example, 1 part by weight can be 1 gram, 1 kilogram, 10 grams, or other weight units. "Weight fraction" refers to the weight ratio of a specific component compared to a reference, expressed as a percentage.

[0031] "Alkali metals" include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs). "Alkaline earth metals" include beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba). In the industry, the most commonly used alkali metals are sodium, potassium, and lithium, while the most commonly used alkaline earth metals are magnesium and calcium.

[0032] According to the object of the present invention, fly ash is used to replace a large portion of Portland cement in adhesive mortars, especially in ceramic tile adhesives. Currently, fly ash is a common raw material for construction products and is commercially available.

[0033] The combination of fly ash and Portland cement can be used as the active material of the binding material. In the present application, based on the total weight of the active materials, the weight fraction of fly ash is at most 80%, preferably at most 70%, more preferably at most 60%, and the rest is Portland cement.

[0034] Fly ash can be a product that complies with national standards, such as the Chinese standard GB / T 1596-2017 "Fly ash used for cement and concrete." Portland cement can be a product that complies with standards, such as the Chinese standard GB175-2020 "General-purpose Portland cement."

[0035] An activator is used in the bonding material to activate the activity of fly ash.

[0036] In one embodiment, the activator may be at least one of an alkali metal or alkaline earth metal chloride and an alkali metal or alkaline earth metal format.

[0037] For example, the alkali metal or alkaline earth metal formate is sodium formate, calcium formate, potassium formate, magnesium formate or lithium formate, hereinafter referred to as formate. The alkali metal or alkaline earth metal chloride is lithium chloride, magnesium chloride, calcium chloride, potassium chloride or sodium chloride, hereinafter referred to as chloride.

[0038] In some examples, the activator is a formate; in some examples, the activator is a chloride; and in some examples, the activator is a combination of a formate and a chloride.

[0039] Although examples of using calcium formate, sodium chloride and calcium chloride are given in the following table, those skilled in the art will appreciate that other alkali metal or alkaline earth metal formates and chlorides are also feasible.

[0040] The activator may also include an alkali metal or alkaline earth metal hydroxide, such as sodium hydroxide, calcium hydroxide, potassium hydroxide, magnesium hydroxide, or lithium hydroxide (hereinafter referred to as hydroxide). The hydroxide reacts with the fly ash. The use of hydroxide in the activator can supplement alkalinity, thereby improving strength, and reduce the amount of formate used, thereby reducing costs.

[0041] In some examples, the activator may be a combination of hydroxide and formate, while in other examples, the activator may be a combination of hydroxide, formate, and chloride.

[0042] In the present application, calcium hydroxide is taken as an example, but those skilled in the art will appreciate that other hydroxides are also feasible.

[0043] Furthermore, the activator may also include alkali metal or alkaline earth metal tripolyphosphates, such as sodium tripolyphosphate, lithium tripolyphosphate, potassium tripolyphosphate, calcium tripolyphosphate, hereinafter referred to as tripolyphosphates. The use of tripolyphosphates in the activator can improve the water-immersion tensile bond strength of the final product.

[0044] In some examples, the activator may be a combination of formate and tripolyphosphate. In other examples, the activator may be a combination of formate, chloride, and tripolyphosphate. Alternatively, in still other examples, the activator may be a combination of formate, tripolyphosphate, and hydroxide.

[0045] In this application, sodium tripolyphosphate is used as an example, but those skilled in the art will appreciate that other tripolyphosphates are also feasible.

[0046] In the bonding material, the active material is present in an amount of 25-40 parts by weight, and the activator is present in an amount of up to 2.5 parts by weight.

[0047] The weight portion of the formate salt is at most 1 part, or the weight portion of the formate salt is at most 0.75 parts, and the weight portion of the chloride is at most 1.5 parts. In particular, when the formate salt and the chloride are used in combination, the ratio of the weight of the formate salt to the weight of the chloride is 1:0.5-6.

[0048] In addition, the weight portion of the hydroxide in the activator is at most 2 parts, or at most 1 part, or at most 0.5 parts. Furthermore, the weight portion of the tripolyphosphate is at most 0.5 parts.

[0049] Therefore, another embodiment of the present invention is an excitation material comprising the aforementioned excitation agent combination, which is used to excite inorganic active components. In one example, the excitation material is a combination of hydroxide and chloride. In another example, the excitation material is a combination of hydroxide and formate. In yet another example, the excitation material is a combination of hydroxide, formate, and chloride. In yet another example, the excitation material is a combination of formate and tripolyphosphate. In yet another example, the excitation material is a combination of formate, chloride, and tripolyphosphate. In yet another example, the excitation material is a combination of formate, hydroxide, and tripolyphosphate. Wherein, the weight portion of formate is at most 1 part, or at most 0.75 parts; the weight portion of chloride is at most 1.5 parts; the weight portion of hydroxide is at most 2 parts, or at most 1 part, or at most 0.5 parts; and the weight portion of tripolyphosphate is at most 0.5 parts.

[0050] According to another embodiment of the present invention, a dry-mix mortar made using the aforementioned bonding material includes the aforementioned active material, the aforementioned activator, a filler, an aggregate, and an additive. In particular, by weight, the active material comprises 25-40 parts, the activator comprises up to 2.5 parts, the filler comprises 0-20 parts, the aggregate comprises 45-65 parts, and the additive comprises up to 5 parts.

[0051] The fillers and aggregates are granules or powders, serving as fillers and support, respectively. Fillers and aggregates are distinguished by particle size; for example, fine aggregate can replace fillers. Common fillers include limestone, but other materials are also acceptable. Common aggregates include sand, such as natural sand, river sand, or machine-made sand, preferably ISO standard sand. The fillers and aggregates used in the present invention can be obtained commercially.

[0052] Cellulose ether is a polymer compound with an ether structure made from cellulose. Generally, it can be used as a water-retaining agent to adjust the water retention of products and make the products have good operability. Usually, the weight of cellulose ether is up to 0.5 parts

[0053] Redispersible polymer powder is a water-soluble redispersible powder that can be quickly dispersed into an emulsion after contact with water. Redispersible polymer powder is usually made from raw materials such as polymer resin, protective colloid, anti-caking agent by spray drying. Redispersible polymer powder can adjust the alkali resistance of mortar, improve the adhesion, flexural strength, waterproofness, plasticity, wear resistance and workability of mortar. Those skilled in the art will appreciate that adding redispersible polymer powder can enhance the tensile bond strength of ceramic tile adhesives, and the tensile bond strength increases with the amount of redispersible polymer powder used. Typically, the weight portion of redispersible polymer powder is at most 3 parts.

[0054] The polymer resin in the redispersible latex powder may include, but is not limited to, vinyl acetate / ethylene copolymer, styrene / butadiene copolymer, vinyl acetate / vinyl neodecanoate copolymer, and the like.

[0055] In another embodiment, the dry-mixed mortar is mixed with water to obtain a bonding mortar slurry, wherein the weight ratio of the dry-mixed mortar to the water is 100:20-100:25.

[0056] Tables 1-5 provide examples of various adhesive slurries, corresponding to different combinations of activators and varying fly ash content in the active material. Samples were prepared and tested for tensile bond strength (in megapascals (MPa)) according to the methods and standards specified in JC / T 547-2017, "Ceramic Wall and Floor Tile Adhesives," using the weights indicated for each example.

[0057] In Table 1, different combinations of calcium formate and sodium chloride were used as activators in Examples 1-8. The tensile bond strength test results are shown in Table 1. As the amount of activator increased, the tensile bond strength of the samples increased at both 7 and 28 days.

[0058] Table 1

[0059] In Examples 9 and 10 given in Table 2, the weight fractions of fly ash in the active material are 70% and 80%, respectively, and the test results are shown in Table 2. Under the same activator combination and dosage, with reference to Example 5, as the amount of fly ash increases, the tensile bond strength of the sample decreases. However, redispersible latex powder was not used in Examples 9 and 10. As known to those skilled in the art, the use of redispersible latex powder can increase the tensile bond strength, and the tensile bond strength increases with the increase in the amount of redispersible latex powder. Therefore, the tensile bond strength can be improved by using redispersible latex powder in Examples 9 and 10. In particular, the amount of redispersible latex powder can be increased in the formula of Example 10 so that the final product at least meets the requirements of C0 grade ceramic tile adhesive, with reference to the Chinese standard GB / T 25181-2019 "Ready-mixed mortar".

[0060] Table 2

[0061] Table 3 gives an example of using calcium chloride. It can be seen that the formula using calcium chloride also meets the requirements of the standard.

[0062] Table 3

[0063] Table 4 shows an example using calcium hydroxide in an activator. Calcium hydroxide supplements alkalinity, contributing to improved strength. Compared to Example 1, the activator using a combination of calcium formate and calcium hydroxide resulted in higher 28-day tensile bond strength.

[0064] Table 4

[0065] In the examples given in Table 5, the 28-day water immersion tensile bond strength of the samples is higher because the activator contains sodium tripolyphosphate.

[0066] Table 5

[0067] In the above description, the details of the technical solution of the present invention are explained. However, those skilled in the art will appreciate that the present invention is not limited to the specific details listed in the above embodiments, but may vary within the scope defined by the claims.

Claims

1. A bonding material, comprising the following components by weight: Active material, 25 - 40 parts, wherein, The active material includes fly ash and Portland cement; and an activator, up to 2.5 parts, wherein the activator includes at least one of chlorides of alkali metals or alkaline earth metals and formates of alkali metals or alkaline earth metals.

2. The bonding material according to claim 1, wherein, Based on the total weight of the active material, the active material contains up to 80% fly ash, or up to 70% fly ash, or up to 60% fly ash, and the balance is Portland cement.

3. The bonding material according to claim 1, wherein, The weight of the formate of the alkali metal or alkaline earth metal is up to 1 part or up to 0.75 part, and the weight of the chloride of the alkali metal or alkaline earth metal is up to 1.5 parts.

4. The bonding material according to claim 3, wherein, The ratio of the weight of the formate of the alkali metal or alkaline earth metal to the weight of the chloride of the alkali metal or alkaline earth metal is 1:0.5 - 6.

5. The bonding material according to claim 1, wherein, The formate of the alkali metal or alkaline earth metal is sodium formate, calcium formate, potassium formate, magnesium formate or lithium formate, and the chloride of the alkali metal or alkaline earth metal is lithium chloride, magnesium chloride, calcium chloride, potassium chloride or sodium chloride.

6. The bonding material according to claim 1, wherein, The activator includes a formate of an alkali metal or alkaline earth metal and further includes a hydroxide of an alkali metal or alkaline earth metal, wherein the weight of the hydroxide of the alkali metal or alkaline earth metal is up to 2 parts, or up to 1 part, or up to 0.5 part.

7. The bonding material according to claim 6, wherein, The hydroxide of the alkali metal or alkaline earth metal is sodium hydroxide, calcium hydroxide, potassium hydroxide, magnesium hydroxide or lithium hydroxide.

8. The bonding material according to any one of claims 1 - 7, wherein, The activator includes a formate of an alkali metal or alkaline earth metal and further includes a tripolyphosphate of an alkali metal or alkaline earth metal, wherein the tripolyphosphate of the alkali metal or alkaline earth metal is up to 0.5 part.

9. The bonding material according to claim 8, wherein, The tripolyphosphate of the alkali metal or alkaline earth metal is sodium tripolyphosphate, lithium tripolyphosphate, potassium tripolyphosphate, calcium tripolyphosphate.

10. An activating material for inorganic active components, comprising a combination selected from formates of alkali metals or alkaline earth metals, chlorides of alkali metals or alkaline earth metals, hydroxides of the alkali metals or alkaline earth metals, and tripolyphosphates of the alkali metals or alkaline earth metals.

11. The activating material for inorganic active components according to claim 10, wherein, The activating material is a combination of a formate of an alkali metal or alkaline earth metal with the chloride of the alkali metal or alkaline earth metal, the hydroxide of the alkali metal or alkaline earth metal or the tripolyphosphate of the alkali metal or alkaline earth metal, or the activating material is a combination of a formate of an alkali metal or alkaline earth metal, the chloride of the alkali metal or alkaline earth metal and the hydroxide of the alkali metal or alkaline earth metal, or the activating material is a combination of a formate of an alkali metal or alkaline earth metal, the chloride of the alkali metal or alkaline earth metal and the tripolyphosphate of the alkali metal or alkaline earth metal, or the activating material is a combination of a formate of an alkali metal or alkaline earth metal, the hydroxide of the alkali metal or alkaline earth metal and the tripolyphosphate of the alkali metal or alkaline earth metal.

12. The activating material for inorganic active components according to claim 10 or 11, wherein, The weight of the formate of the alkali metal or alkaline earth metal is up to 1 part, or up to 0.75 part, and the weight of the chloride of the alkali metal or alkaline earth metal is up to 1.5 parts.

13. The activating material for inorganic active components according to claim 11, wherein, The ratio of the weight of the formate of the alkali metal or alkaline earth metal to the weight of the chloride of the alkali metal or alkaline earth metal is 1:0.5 - 6.

14. The activating material for inorganic active components according to claim 10 or 11, wherein, The weight of the hydroxide of the alkali metal or alkaline earth metal is up to 2 parts, or up to 1 part, or up to 0.5 part.

15. The activating material for inorganic active components according to claim 10 or 11, wherein the tripolyphosphate of the alkali metal or alkaline earth metal is at most 0.5 part.

16. The activating material for inorganic active components according to claim 10 or 11, wherein, The formate of the alkali metal or alkaline earth metal is sodium formate, calcium formate, potassium formate, magnesium formate or lithium formate; the chloride of the alkali metal or alkaline earth metal is lithium chloride, magnesium chloride, calcium chloride, potassium chloride or sodium chloride; the hydroxide of the alkali metal or alkaline earth metal is sodium hydroxide, calcium hydroxide, potassium hydroxide, magnesium hydroxide or lithium hydroxide; the tripolyphosphate of the alkali metal or alkaline earth metal is sodium tripolyphosphate, lithium tripolyphosphate, potassium tripolyphosphate, calcium tripolyphosphate.

17. A dry-mixed mortar, comprising the following components by weight: active materials, 25 - 40 parts, wherein the active materials include fly ash and portland cement; an activator, at most 2.5 parts, wherein the activator includes at least one of chlorides of alkali metals or alkaline earth metals and formates of alkali metals or alkaline earth metals; a filler, 0 - 20 parts; an aggregate, 45 - 65 parts; and an additive, 0 - 5 parts.

18. The dry-mixed mortar according to claim 17, wherein, Based on the total weight of the active materials, the active materials contain at most 80% of fly ash, or at most 70% of fly ash, or at most 60% of fly ash, and the balance is portland cement.

19. The dry-mixed mortar according to claim 17, wherein, The weight portion of the formate of the alkali metal or alkaline earth metal is at most 1 portion, or at most 0.75 portion, and the weight portion of the chloride of the alkali metal or alkaline earth metal is at most 1.5 portions.

20. The dry-mixed mortar according to claim 19, wherein, The ratio of the weight of the formate of the alkali metal or alkaline earth metal to the weight of the chloride of the alkali metal or alkaline earth metal is 1:0.5 - 6.

21. The dry-mixed mortar according to claim 17, wherein, The formate of the alkali metal or alkaline earth metal is sodium formate, calcium formate, potassium formate, magnesium formate or lithium formate; the chloride of the alkali metal or alkaline earth metal is lithium chloride, magnesium chloride, calcium chloride, potassium chloride or sodium chloride.

22. The dry-mixed mortar according to claim 17, wherein, The activator includes the formate of the alkali metal or alkaline earth metal and further includes the hydroxide of the alkali metal or alkaline earth metal, wherein the weight portion of the hydroxide of the alkali metal or alkaline earth metal is at most 2 portions, or at most 1 portion, or at most 0.5 portion.

23. The dry-mixed mortar according to claim 22, wherein, The hydroxide of the alkali metal or alkaline earth metal is sodium hydroxide, calcium hydroxide, potassium hydroxide, magnesium hydroxide or lithium hydroxide.

24. The dry-mixed mortar according to claim 17, wherein, The activator includes the formate of the alkali metal or alkaline earth metal and further includes the tripolyphosphate of the alkali metal or alkaline earth metal, wherein the tripolyphosphate of the alkali metal or alkaline earth metal is at most 0.5 portion.

25. The dry-mixed mortar according to claim 24, wherein, The tripolyphosphate of the alkali metal or alkaline earth metal is sodium tripolyphosphate, lithium tripolyphosphate, potassium tripolyphosphate, calcium tripolyphosphate.

26. The dry-mixed mortar according to claim 17, wherein, The additive includes redispersible latex powder, cellulose ether or a combination thereof.

27. The dry-mixed mortar according to claim 26, wherein, The weight portion of the cellulose ether is at most 0.5 portion, and the weight portion of the redispersible latex powder is at most 3 portions.

28. An adhesive mortar slurry, comprising the dry-mixed mortar according to any one of claims 17 - 27 and water, wherein, The weight ratio of the dry-mixed mortar to the water is 100:20 - 100:25.