Cement-based capillary crystalline waterproofing agent and waterproofing material

Abstract

The application discloses cement-based capillary crystalline waterproofing agent and waterproof material, comprising: complexing agent, active silicon additive, waterproof additive and calcium ion compensator; wherein, the mass ratio of complexing agent, active silicon additive, waterproof additive and calcium ion compensator is 0.75-3:0.25-1:0.25-1:0.25-1. The waterproofing agent in the application has the characteristics of permanence, strong permeability, improving the density of concrete and preventing the corrosion of steel bars in concrete; specifically, the waterproofing agent in the application improves the number of insoluble crystals in concrete through the interaction between components, thereby improving the density of concrete, increasing the impermeability of concrete, and avoiding the corrosion of steel bars in concrete. In addition, the complexing agent in the application does not cause consumption to itself when carrying Ca 2+ Therefore, the waterproofing agent in the application has permanence.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waterproof materials, in particular to a cement-based penetrating crystalline waterproofing agent and a waterproof material. BACKGROUND

[0002] At the initial stage of concrete mixing, there is a large amount of free water, which will inevitably form a large number of micro-holes after setting and hardening, resulting in shrinkage cracking of the concrete structure. Therefore, there are two main reasons for the leakage of cement buildings formed by concrete. One is that the cement hydration and evaporation of free water leave some capillary pores in the interior of the cement building material, which form the water leakage channel. The second is that when the tricalcium silicate is converted into dicalcium silicate after cement hydration, calcium hydroxide which is easily soluble in water is produced. Due to the precipitation and dissolution of a large amount of calcium hydroxide, holes appear in the interior of the cement building material, thereby causing the leakage of the cement building.

[0003] At present, the common waterproofing agents on the market can be divided into internal mixing and external wrapping according to their use. Among them, the external wrapping waterproofing materials such as asphalt, oil felt and other waterproofing membranes are still widely used in building waterproofing due to their low price, convenient and rapid construction and other characteristics. However, the external wrapping waterproofing is like wearing a waterproof cloth on the concrete, which is easily torn by sharp objects, and the repair period is long and the cost is high.

[0004] The internal mixing waterproofing agent is generally added as an additive to the concrete. Common internal mixing waterproofing agents such as sodium silicate, fatty acid soap, fly ash, talcum powder, etc. mainly plug the pores in the interior of the cement building material, thereby solving the problem of water leakage of the cement building.

[0005] However, the concrete buildings containing the above-mentioned internal mixing waterproofing agents all have the problem of small penetration pressure, resulting in poor waterproofing performance. Therefore, a waterproofing agent with good waterproofing performance needs to be developed. SUMMARY

[0006] In order to solve the problem of small penetration pressure of the concrete mixed with the existing waterproofing agent, one of the purposes of the present application is to provide a cement-based penetrating crystalline waterproofing agent.

[0007] The technical solution of the present application to solve the above technical problems is as follows:

[0008] A cement-based penetrating crystalline waterproofing agent, comprising: a complexing agent, an active silicon additive, a waterproofing additive and a calcium ion compensating agent; wherein the mass ratio of the complexing agent, the active silicon additive, the waterproofing additive and the calcium ion compensating agent is 0.75-3:0.25-1:0.25-1:0.25-1.

[0009] The waterproofing agent in the application can promote the increase in the number of insoluble crystals in the concrete and the generation of the insoluble crystals, thereby increasing the density of the concrete, improving the osmotic pressure of the concrete, and improving the waterproofing performance of the concrete building.

[0010] Based on the above technical solution, the application can be further improved as follows:

[0011] Further, the mass ratio of the complexing agent, the active silicon aid, the waterproofing aid, and the calcium ion compensator is 1.5:0.5:1:0.75.

[0012] Further, the complexing agent comprises glycine and EDTA tetrasodium; and the mass ratio of the glycine and the EDTA tetrasodium is 1:2-1.5:2.

[0013] The beneficial effects of the above technical solution are as follows: The complexing agent in the application acts as a "mover" when repairing the cracks or pores of the concrete, that is, the complexing agent carries the Ca 2+ The high-concentration water is transported to the low-concentration water, which promotes the generation of insoluble crystals (such as calcium silicate and calcium chlorate) to a certain extent, increases the density of the concrete, increases the osmotic pressure of the concrete, and improves the impermeability of the concrete. Moreover, the complexing agent is in a dormant state when it is dry, and only produces the "mover" effect when there is water. In addition, the complexing agent itself does not cause substantial loss when repairing the cracks and pores of the concrete. Therefore, the waterproofing agent in the application is permanent.

[0014] Further, the active silicon aid comprises sodium methyl silicate and sodium silicate; and the mass ratio of the sodium methyl silicate and the sodium silicate is 1:5-2:5.

[0015] Further, the waterproofing aid comprises sodium sulfate and sodium aluminate; and the mass ratio of the sodium sulfate and the sodium aluminate is 3:5-4:5.

[0016] Further, the calcium ion compensator comprises slaked lime.

[0017] The beneficial effects of the above technical solution are as follows: The active silicon aid and the waterproofing aid in the application provide SiO 2- and AlO 2- , which are beneficial to increasing the number of insoluble crystals, thereby increasing the density of the concrete and increasing the impermeability of the concrete. 2+

[0018] Further, the cement-based permeable crystalline waterproofing agent further comprises a water-retaining agent, Portland cement, quartz sand, and silica fume. ​

[0019] The mass ratio of the complexing agent, the active silicon additive, the waterproofing additive, the calcium ion compensator, the water retaining agent, the Portland cement, the quartz sand and the silica ash is 0.75-3:0.25-1:0.25-1:0.25-1:0.1-0.17:0.2-0.4:0.4-0.6:2-5.

[0020] Further, the water retaining agent is a cellulose ether.

[0021] The second object of the present application is to provide a cement-based capillary crystalline waterproofing material, which comprises the waterproofing agent of the first object, and further comprises cement and standard sand, wherein the mass ratio of the cement and the standard sand is 300-500:1300-1400.

[0022] Further, the complexing agent is 0.75%-3% of the mass of the cement, the active silicon additive is 0.25%-1% of the mass of the cement, the active silicon additive is 0.25%-1% of the mass of the cement, the calcium ion compensator is 0.25%-1% of the mass of the cement, the water retaining agent is 0.1%-0.17% of the mass of the cement, the Portland cement is 0.2%-0.4% of the mass of the cement, the quartz sand is 0.4%-0.6% of the mass of the cement, and the silica ash is 2%-5% of the mass of the cement.

[0023] The present application has the following advantages:

[0024] The waterproofing agent in the present application has the characteristics of permanence, strong penetration, improved density of concrete and prevention of corrosion of steel bars in concrete. Specifically, the waterproofing agent in the present application improves the number of insoluble crystals in concrete through the interaction between the components, thereby improving the density of concrete, increasing the impermeability of concrete, and avoiding corrosion of steel bars in concrete. In addition, the complexing agent in the present application does not consume itself when transporting Ca 2+ Therefore, the waterproofing agent in the present application has permanence. DETAILED DESCRIPTION

[0025] The cement-based capillary crystalline waterproofing agent and the waterproofing material in the present application will be described below in conjunction with examples.

[0026] However, the present application can be exemplified in many different forms and should not be interpreted as being limited to the specific embodiments set forth herein. Rather, the purpose of providing these embodiments is to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0027] The inventor has deep experience in the field of building waterproofing materials and has conducted in-depth research on the mechanism of the cement-based capillary crystalline waterproofing agent. The waterproofing mechanism is as follows:

[0028] (1) Precipitation reaction mechanism

[0029] According to the precipitation reaction theory, the repair of concrete cracks and pores is essentially a reaction between active chemical substances and cement hydration products (such as Ca(OH)2) and CaO, generating water-insoluble substances that block cracks and pores, thereby increasing the density of concrete, effectively preventing water intrusion, and improving the durability of concrete.

[0030] When water initially seeps into cracks formed after concrete has hardened, the Ca(OH)2 on the inner wall of the crack dissolves and reacts with the active chemicals in the cement-based penetrating crystalline waterproofing agent, generating a large amount of insoluble hydrated calcium silicate gel, along with some needle-like ettringite crystals. Furthermore, as water seeps along the cracks, it also introduces carbon dioxide, causing carbonation of the concrete surface near the water, forming water-insoluble CaCO3 crystals. Therefore, the dendritic hydrated calcium silicate gel and needle-like ettringite crystals continuously grow, and the continuous formation of calcium carbonate crystals can seal the cracks and prevent water penetration in a relatively short time.

[0031] Furthermore, the active chemicals in cement-based penetrating crystalline waterproofing agents will "dormant" in a dry state, thus losing their activity. When the concrete structure is subjected to stress and cracks again, the active chemicals will be activated as water seeps in, and the above-mentioned reaction will occur again where water has penetrated, generating water-insoluble gels and crystals that accumulate until the cracks heal.

[0032] (2) Complexation-precipitation reaction mechanism

[0033] The complexation-precipitation reaction theory states that when water seeps into a concrete structure, the Ca(OH)₂ crystals near the water dissolve, thereby ionizing Ca. 2+ The complex in the waterproofing agent will react with Ca. 2+ In areas of high concentration, a complexation reaction occurs, forming water-insoluble calcium ion complexes. These complexes continuously move along gaps and pores, and upon encountering silicate and aluminate ions, the Ca in the complexes... 2+ The calcium ions are removed by silicate and aluminate ions, forming more stable hydrated calcium silicate gel and hydrated calcium sulfoaluminate crystals. The calcium ions removed... 2+ The complex will be in a free state, and it will then participate in the reaction as a "transporter," carrying Ca... 2+ The process continues to transfer from high-concentration areas to low-concentration areas, continuously generating hydrated calcium silicate gel and hydrated calcium sulfoaluminate crystals. Large amounts of gel and crystals are constantly formed, blocking the cracks. When water seeps in again, the complex will repeat the above process, while it remains dormant when dry.

[0034] Based on this, the embodiment of the first aspect of the application provides a cement-based capillary crystalline waterproofing agent, comprising: a complexing agent (LJ), an active silicon additive (SI), a waterproofing additive (FN) and a calcium ion compensation agent (GB); wherein the mass ratio of the complexing agent, the active silicon additive, the waterproofing additive and the calcium ion compensation agent is: 0.75-3:0.25-1:0.25-1:0.25-1.

[0035] The waterproofing agent in the embodiment has the characteristics of being permanent, having strong permeability, improving the density of concrete and preventing corrosion of steel bars in concrete.

[0036] The waterproofing agent in the embodiment has the characteristics of being permanent, having strong permeability, improving the density of concrete and preventing corrosion of steel bars in concrete.

[0037] In the embodiment, the waterproofing agent can be directly added to concrete for use, or can be mixed with cement and standard sand and the like as a cement-based capillary crystalline repair material to repair cracks and pores of concrete in the later period.

[0038] The waterproofing agent in the embodiment is described below by taking the case of directly adding the waterproofing agent to concrete for use.

[0039] In the initial hydration period of fresh concrete, the ions in the complexing agent will react with Ca 2+ to generate unstable and water-insoluble calcium ion complexes, and when the calcium ion complexes meet active silicon oxide, active aluminum oxide or silicates, the Ca 2+ will be replaced, and the Ca 2+ reacts with active silicon oxide, active aluminum oxide or silicates to generate insoluble crystals, and the complexing agent is released.

[0040] In addition, when the concrete structure is dry, the complexing agent in the waterproofing agent is in a dormant state; when the concrete structure leaks or is in a water environment, the complexing agent will be activated, and will react with the hydration products of cement (such as Ca(OH)2) to generate unstable calcium ion complexes. When the generated unstable calcium ion complexes meet active silicon oxide, active aluminum oxide or silicates, the complexing agent ions will be replaced, and water-insoluble crystals will be generated, and as the number of insoluble crystals increases, the crack space will continuously decrease until the crack is healed, the cracks in the concrete are repaired, and concrete leakage is avoided. When the interior of the concrete structure returns to dry, the complexing agent enters a dormant state; in the entire process of repairing the cracks in the concrete structure, the complexing agent component plays the role of a "mover" and continuously replaces Ca2+ The process of transferring the complexing agent from a high concentration to a low concentration does not consume the complexing agent, thus achieving a permanent waterproof effect. Preferably, the complexing agent in this embodiment includes glycine and tetrasodium EDTA, wherein the mass ratio of glycine to tetrasodium EDTA is 1:2 to 1.5:2; more preferably, the mass ratio of glycine to tetrasodium EDTA is 1:2.

[0041] In this embodiment, the active silicone additive and waterproofing additive provide SiO₂. 2- and AlO 2- SiO 2- and AlO 2- Both are related to Ca 2+ The reaction increases the number of insoluble crystals in the concrete (i.e., the number of hydrated calcium silicate gel and calcium aluminate crystals), thereby improving the density and impermeability of the concrete. Preferably, the active silicate additive in this embodiment includes sodium methylsilicate and sodium silicate, wherein the mass ratio of sodium methylsilicate to sodium silicate is 1:5 to 2:5; more preferably, the mass ratio of sodium methylsilicate to sodium silicate is 1:5. Preferably, the waterproofing additive in this embodiment includes sodium sulfate and sodium aluminate, wherein the mass ratio of sodium sulfate to sodium aluminate is 3:5 to 4:5; more preferably, the mass ratio of sodium sulfate to sodium aluminate is 4:5. In this example, sodium aluminate promotes cement hydration, while the sulfate ions in sodium sulfate can react with cement hydration products such as calcium hydroxide and hydrated calcium aluminate to generate insoluble calcium sulfate and ettringite crystals, thereby improving the impermeability of the concrete.

[0042] In this example, the calcium ion compensator mainly replenishes the calcium in the waterproofing agent. 2+ This calcium ion compensator exhibits a common ion effect within the concrete, promoting the growth of insoluble crystals and improving the concrete's impermeability. Preferably, in this embodiment, the calcium ion compensator is slaked lime.

[0043] Based on this, the waterproofing agent of the present invention promotes the increase and formation of insoluble crystals from multiple directions, thereby increasing the density of concrete and enhancing its impermeability; therefore, the waterproofing agent of the present invention has a better repair effect on concrete.

[0044] In addition, in some embodiments, the cement-based capillary crystalline waterproofing agent further comprises a water-retaining agent, Portland cement, quartz sand, and silica fume; the mass ratio of the complexing agent, the active silicon additive, the waterproofing additive, the calcium ion compensator, the water-retaining agent, the Portland cement, the quartz sand, and the silica fume is 0.75-3:0.25-1:0.25-1:0.25-1:0.1-0.17:0.2-0.4:0.4-0.6:2-5. In this embodiment, the quartz sand and the silica fume fill the pores and gaps of the concrete, to some extent, increase the density of the concrete, interact with the generated insoluble crystals, and quickly repair the gaps and pores of the concrete; preferably, the silica fume and the quartz sand in this embodiment are in nanoscale.

[0045] In addition, the SiO 2- The plasma interacts with Ca 2+ reacts, and further can quickly form a base point based on the insoluble crystals between the gaps and pores of the concrete, the waterproofing agent is supported by the base point, and further quickly forms the insoluble crystals on the base point, to accelerate the repair of the gaps and pores; that is, the complexing agent, the active silicon additive, the waterproofing additive, and the calcium ion compensator interact with each other, accelerate the formation of the insoluble crystals, and realize the repair of the gaps and pores.

[0046] Preferably, the water-retaining agent in this embodiment is a cellulose ether, such as a hydroxypropyl cellulose ether.

[0047] The second aspect of the embodiments of the present application provides a waterproofing material comprising the cement-based capillary crystalline waterproofing agent in the first aspect of the embodiments, the waterproofing material further comprises cement and standard sand, and the mass ratio of the cement and the standard sand is 300-500:1300-1400.

[0048] In this example, the complexing agent is 0.75%-3% of the mass of the cement, the active silicon additive is 0.25%-1% of the mass of the cement; the active silicon additive is 0.25%-1% of the mass of the cement; the calcium ion compensator is 0.25%-1% of the mass of the cement, the water-retaining agent is 0.1%-0.17% of the mass of the cement, the Portland cement is 0.2%-0.4% of the mass of the cement, the quartz sand is 0.4%-0.6% of the mass of the cement, and the silica fume is 2%-5% of the mass of the cement.

[0049] In addition, the cement in this embodiment is P.O 42.5R grade ordinary Portland cement.

[0050] Embodiments

[0051] Embodiment 1

[0052] A cement-based capillary crystalline waterproofing agent, comprising:

[0053] The complexing agent, the active silicon additive, the waterproofing additive, the calcium ion compensator, the water-retaining agent, the Portland cement, the quartz sand and the silica ash have a mass ratio of 0.75:0.5:0.5:0.25:0.16:0.3:0.4:4;

[0054] The complexing agent is composed of glycine and EDTA tetrasodium, and the mass ratio of the glycine and the EDTA tetrasodium is 1:2.

[0055] The active silicon additive is composed of sodium methylsilicate and sodium silicate, and the mass ratio of the sodium methylsilicate and the sodium silicate is 1:5.

[0056] The waterproofing additive is composed of sodium sulfate and sodium metaaluminate, and the mass ratio of the sodium sulfate and the sodium metaaluminate is 4:5.

[0057] The calcium ion compensator is slaked lime.

[0058] The water-retaining agent is hydroxypropyl cellulose ether.

[0059] The waterproofing agent in the embodiment is mixed with cement and standard sand to obtain a cement-based permeable crystalline waterproofing material; wherein the mass ratio of the cement and the standard sand is 320:1350, and the mass of the complexing agent, the active silicon additive, the waterproofing additive, the calcium ion compensator, the water-retaining agent, the Portland cement, the quartz sand and the silica ash in the waterproofing material is 0.75%, 0.5%, 0.5%, 0.25%, 0.16%, 0.3%, 0.4% and 4% of the mass of the cement respectively.

[0060] Example 2

[0061] The cement-based permeable crystalline waterproofing agent in the embodiment is the same as that in Example 1, except that the mass ratio of the complexing agent, the active silicon additive, the waterproofing additive, the calcium ion compensator, the water-retaining agent, the Portland cement, the quartz sand and the silica ash is 0.75:0.75:0.75:0.5:0.16:0.3:0.4:4.

[0062] The cement-based permeable crystalline waterproofing material in the embodiment is the same as that in Example 1, except that the mass of the complexing agent, the active silicon additive, the waterproofing additive and the calcium ion compensator in the waterproofing material is 0.75%, 0.75%, 0.75% and 0.5% of the mass of the cement respectively (see Table 1 for details).

[0063] Example 3

[0064] The cement-based permeable crystalline waterproofing agent in the embodiment is the same as that in Example 1, except that the mass ratio of the complexing agent, the active silicon additive, the waterproofing additive, the calcium ion compensator, the water-retaining agent, the Portland cement, the quartz sand and the silica ash is 0.75:1:1:0.75:0.16:0.3:0.4:4.

[0065] The cement-based capillary crystalline waterproofing material in this example is the same as in Example 1, except that the mass ratio of the complexing agent, active silica additive, waterproofing additive, and calcium ion compensator in the waterproofing material is 0.75%, 1%, 1%, and 0.75% of the mass of the cement, respectively (see Table 1).

[0066] Example 4

[0067] The cement-based capillary crystalline waterproofing material in this example is the same as in Example 1, except that the mass ratio of the complexing agent, active silica additive, waterproofing additive, calcium ion compensator, water-retaining agent, Portland cement, quartz sand, and silica fume is 1.5:0.75:0.5:0.75:0.16:0.3:0.4:4.

[0068] The cement-based capillary crystalline waterproofing material in this example is the same as in Example 1, except that the mass ratio of the complexing agent, active silica additive, waterproofing additive, and calcium ion compensator in the waterproofing material is 1.5%, 0.75%, 0.5%, and 0.75% of the mass of the cement, respectively (see Table 1).

[0069] Example 5

[0070] The cement-based capillary crystalline waterproofing material in this example is the same as in Example 1, except that the mass ratio of the complexing agent, active silica additive, waterproofing additive, calcium ion compensator, water-retaining agent, Portland cement, quartz sand, and silica fume is 1.5:1:0.75:0.25:0.16:0.3:0.4:4.

[0071] The cement-based capillary crystalline waterproofing material in this example is the same as in Example 1, except that the mass ratio of the complexing agent, active silica additive, waterproofing additive, and calcium ion compensator in the waterproofing material is 1.5%, 1%, 0.75%, and 0.25% of the mass of the cement, respectively (see Table 1).

[0072] Example 6

[0073] The cement-based capillary crystalline waterproofing material in this example is the same as in Example 1, except that the mass ratio of the complexing agent, active silica additive, waterproofing additive, calcium ion compensator, water-retaining agent, Portland cement, quartz sand, and silica fume is 1.5:0.5:1:0.5:0.16:0.3:0.4:4.

[0074] The cement-based capillary crystalline waterproofing material in this example is the same as in Example 1, except that the mass ratio of the complexing agent, active silica additive, waterproofing additive, and calcium ion compensator in the waterproofing material is 1.5%, 0.5%, 1%, and 0.5% of the mass of the cement, respectively (see Table 1).

[0075] Example 7

[0076] The cement-based penetrating crystalline waterproofing agent in this example is the same as in Example 1, except that the complexing agent, active silicon additive, waterproofing additive, calcium ion compensator, water retaining agent, Portland cement, quartz sand, and silica fume, have a mass ratio of 2.25:0.5:0.75:0.75:0.16:0.3:0.4:4;

[0077] The cement-based penetrating crystalline waterproofing agent in this example is the same as in Example 1, except that the complexing agent, active silicon additive, waterproofing additive, and calcium ion compensator in the waterproofing material are 2.25%, 0.5%, 0.75%, and 0.75% of the mass of the cement, respectively (see Table 1 for details).

[0078] Comparative Example 1

[0079] A waterproofing material was obtained by mixing a complexing agent (LJ) with cement and standard sand according to Tables 2 and 3, the mass of the complexing agent to cement being as shown in Tables 2 and 3 (i.e. the complexing agent LJ dosage); wherein the complexing agent was composed of glycine and EDTA tetrasodium, the mass ratio of glycine to EDTA tetrasodium being 1:2, and the mass ratio of cement to standard sand being 320:1350.

[0080] Comparative Example 2

[0081] A waterproofing material was obtained by mixing an active silicon additive (SI) with cement and standard sand according to Tables 4 and 5, the mass relationship of the active silicon additive to cement being as shown in Tables 4 and 5 (i.e. the active silicon additive SI dosage); wherein the active silicon additive was composed of sodium methylsiliconate and sodium silicate, the mass ratio of sodium methylsiliconate to sodium silicate being 1:5, and the mass ratio of cement to standard sand being 320:1350.

[0082] Comparative Example 3

[0083] A waterproofing material was obtained by mixing a waterproofing additive with cement and standard sand according to Tables 6 and 7, the mass relationship of the waterproofing additive to cement being as shown in Tables 6 and 7 (i.e. the waterproofing additive FN dosage), wherein the waterproofing additive was composed of sodium sulfate and sodium metaaluminate, the mass ratio of sodium sulfate to sodium metaaluminate being 4:5, and the mass ratio of cement to standard sand being 320:1350.

[0084] Comparative Example 4

[0085] A waterproofing material was obtained by mixing a calcium ion compensator with cement and standard sand according to Tables 8 and 9, the mass relationship of the calcium ion compensator to cement being as shown in Tables 8 and 9 (i.e. the calcium ion compensator GB dosage), wherein the calcium ion compensator was slaked lime, and the mass ratio of cement to standard sand was 320:1350.

[0086] Test Analysis

[0087] 1. Impermeability test, according to the relevant provisions in Cementitious Capillary Crystalline Waterproofing Materials (GB / T 18445-2012) and Waterproofing Agent for Mortar and Concrete (JC 474-2008), the waterproofing materials in the above examples and comparative examples are mixed with water to form concrete, and the impermeability test is performed on the concrete, and the test results are shown in Tables 1, 3, 5, 7 and 9; wherein, when mixing, the mass ratio of cement to water is 320:260.

[0088] 2. Compression test, according to the compression test in accordance with the national standard GB / T 17671-1999 Cement Mortar Strength Test, and the test results are shown in Tables 1, 2, 4, 6 and 8. When testing, the mass ratio of cement to standard sand in the waterproofing materials in the examples and comparative examples is replaced from 320:1350 to 450:1350, and then mixed with water to prepare concrete; wherein, when mixing, the mass ratio of cement to water is 450:225, and the waterproofing materials in Examples 1-7 do not contain the water-retaining agent hydroxypropyl cellulose ether; then the compression strength test is performed on the concrete according to the national standard GB / T 17671-1999.

[0089] Table 1. Test results of Examples 1-7

[0090]

[0091]

[0092] Table 2. Compression test results of concrete with different amounts of LJ in Comparative Example 1

[0093] complexing agent LJ dosage 0％ 0.75％ 1.5％ 2.25％ 3％ 3d compressive strength 21.9 18.46 19.43 15.33 12.51 7d compressive strength 29.5 27.10 28.33 25.81 23.07 28d compressive strength 38.6 39.80 41.10 39.20 35.84

[0094] Table 3. Impermeability test results of concrete with different amounts of LJ in Comparative Example 1

[0095] complexing agent LJ dosage 0％ 0.75％ 1.5％ 2.25％ 3％ impermeability pressure / MPa 0.3 0.5 0.6 0.7 0.6 impermeability pressure ratio / % 100 166.67 200.00 233.33 200.00

[0096] Table 4. Compression test results of concrete with different amounts of SI in Comparative Example 2

[0097] active silicon additive SI dosage 0％ 0.25％ 0.5％ 0.75％ 1％ 3d compressive strength / MPa 21.9 20.10 14.55 13.06 12.51 7d compressive strength / MPa 29.5 25.56 20.61 18.95 15.26 28d compressive strength / MPa 38.6 30.27 39.79 35.61 28.28

[0098] Table 5. Impermeability test results of concrete with different amounts of SI in Comparative Example 2

[0099] active silicon additive SI dosage 0％ 0.25％ 0.5％ 0.75％ 1％ impermeability pressure / MPa 0.3 0.3 0.5 0.6 0.4 impermeability pressure ratio / % 100.00 100.00 166.67 200.00 133.33

[0100] Table 6. Compression test results of concrete with different amounts of FN in Comparative Example 3

[0101]

[0102]

[0103] Table 7. The impermeability test results of the concrete with different contents of FN in the comparative example 3

[0104] waterproofing additive FN dosage 0％ 0.25％ 0.5％ 0.75％ 1％ impermeability pressure / MPa 0.3 0.5 0.6 0.5 0.4 impermeability pressure ratio / % 100 166.67 200.00 166.67 133.33

[0105] Table 8. The compressive test results of the concrete with different contents of GB in the comparative example 4

[0106] calcium ion compensator GB dosage 0％ 0.25％ 0.5％ 0.75％ 1％ 3d compressive strength / MPa 21.9 19.63 14.70 16.35 16.19 7d compressive strength / MPa 29.5 25.73 20.58 28.04 18.78 28d compressive strength / MPa 38.6 39.19 40.43 41.22 38.79

[0107] Table 9. The impermeability test results of the concrete with different contents of GB in the comparative example 4

[0108] calcium ion compensator GB dosage 0％ 0.25％ 0.5％ 0.75％ 1％ impermeability pressure / MPa 0.3 0.4 0.6 0.5 0.4 impermeability pressure ratio / % 100 133.33 200.00 166.67 133.33

[0109] From the above table 1, table 3, table 5, table 7 and table 9, it can be seen that the waterproof material with the waterproof agent of the present application has a large impermeability pressure value, which shows that the waterproof agent of the present application can make the concrete have a good waterproof effect.

[0110] The above description is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cement-based crystalline waterproofing agent, characterized by, Comprise: Complexing agent, active silicon auxiliary agent, waterproofing agent and calcium ion compensator; wherein the mass ratio of the complexing agent, active silicon auxiliary agent, waterproofing agent and calcium ion compensator is 0.75-3:0.25-1:0.25-1:0.25-1; The complexing agent comprises glycine and EDTA tetrasodium; the mass ratio of the glycine and EDTA tetrasodium is 1:2-1.5:2; the active silicon auxiliary agent comprises sodium methyl silicate and sodium silicate; the mass ratio of the sodium methyl silicate and sodium silicate is 1:5-2:5; the waterproofing agent comprises sodium sulfate and sodium metaaluminate; the mass ratio of the sodium sulfate and sodium metaaluminate is 3:5-4:

5.

2. The waterproofing agent according to claim 1, characterized in that, The mass ratio of the complexing agent, active silicon auxiliary agent, waterproofing agent and calcium ion compensator is 1.5:0.5:1:0.

75.

3. The waterproofing agent according to claim 1, characterized in that, The calcium ion compensator comprises slaked lime.

4. The waterproofing agent according to any one of claims 1 to 3, characterized in that, Also comprise water-retaining agent, Portland cement, quartz sand and silica fume; The mass ratio of the complexing agent, active silicon auxiliary agent, waterproofing agent, calcium ion compensator, water-retaining agent, Portland cement, quartz sand and silica fume is 0.75-3:0.25-1:0.25-1:0.25-1:0.1-0.17:0.2-0.4:0.4-0.6:2-5.

5. The waterproofing agent according to claim 4, characterized in that, The water-retaining agent is cellulose ether.

6. A cement-based capillary crystalline waterproofing material, characterized by, The waterproofing agent comprises cement and standard sand, and the mass ratio of the cement and standard sand is 300-500:1300-1400.

7. The cement-based capillary crystalline waterproofing material according to claim 6, characterized in that, The complexing agent is 0.75%-3% of the mass of the cement, the active silicon auxiliary agent is 0.25%-1% of the mass of the cement; the calcium ion compensator is 0.25%-1% of the mass of the cement, the water-retaining agent is 0.1%-0.17% of the mass of the cement, the Portland cement is 0.2%-0.4% of the mass of the cement, the quartz sand is 0.4%-0.6% of the mass of the cement, and the silica fume is 2%-5% of the mass of the cement.

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