A cement reinforcing agent and its application

Abstract

This invention belongs to the field of cement production technology and provides a cement reinforcing agent and its application. The invention uses an activator to stimulate the hydration activity of blast furnace slag or fly ash in cement, thereby increasing its hydration activity and thus improving cement strength; a complexing agent promotes the dissociation of the slag and fly ash structures and forms hydrated calcium silicate with a low Ca / Si ratio, thus improving the structural strength of the cement; and a dispersant ensures the full dispersion of early hydration products, forming a uniform and dense three-dimensional hydration product structure, which is beneficial to the early and later strength of the hardened cement paste. Furthermore, the cement reinforcing agent provided by this invention, when applied to cement, can effectively stimulate the hydration activity of slag and fly ash, so that when slag or fly ash replaces 4-6 percentage points of cement clinker, the quality and performance of the cement remain essentially unchanged, thereby effectively reducing cement costs and benefiting environmental protection.

Description

Technical Field

[0001] This invention relates to the field of cement production technology, specifically to a cement reinforcing agent and its application. Background Technology

[0002] The main component of cement is cement clinker, a composite material made from a mixture of various raw materials, each with different prices. The manufacturing process of cement clinker requires high-temperature calcination, which generates significant amounts of carbon dioxide and pollutants, leading to energy consumption and waste gas treatment issues, thus resulting in relatively high production costs. Cement reinforcing agents can fully activate the cement blend, thereby reducing the amount of cement clinker needed, saving substantial mineral resources and energy, and significantly lowering cement production costs.

[0003] Currently, there are various cement reinforcing agents on the market that also have a certain cement strengthening effect. However, most of these reinforcing agents have many components, complex composition, and complicated formulation procedures. For example, patent CN1033789 discloses an inorganic cement reinforcing agent that uses nearly 12 inorganic material components such as aluminum slag, manganese slag, and zinc slag.

[0004] Therefore, providing a cement reinforcing agent with fewer components and a simpler formulation, and enabling the cement produced to be low-cost and high-strength, has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a cement reinforcing agent and its application. The cement reinforcing agent provided by this invention has few components, a simple formulation, and produces cement with low cost and high strength.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] The present invention provides a cement reinforcing agent comprising, by weight percentage: 55%–70% activator, 20%–35% complexing agent, and 5%–10% dispersant.

[0008] Preferably, the activator is calcined alum or sodium silicate pentahydrate.

[0009] Preferably, the complexing agent is trisodium triamcinate or disodium ethylenediaminetetraacetate.

[0010] Preferably, the dispersant is sodium hexametaphosphate or sodium pyrophosphate.

[0011] Preferably, by mass percentage, it comprises 55%–65% calcined alum, 25%–35% trisodium nitrilotriacetate, and 5%–10% sodium hexametaphosphate.

[0012] Preferably, by mass percentage, it comprises 55%–65% sodium silicate pentahydrate, 25%–35% disodium ethylenediaminetetraacetate, and 5%–10% sodium hexapyrophosphate.

[0013] The present invention also provides the application of the cement reinforcing agent described in the above technical solution in cement, wherein the cement reinforcing agent is mixed with cement base material and cement grinding aid and then ground to obtain cement;

[0014] Alternatively, the cement reinforcing agent can be made into powder and then mixed with powdered cement to obtain cement; the powdered cement is obtained by grinding cement base material and cement grinding aid; the amount of cement reinforcing agent added is 2‰ to 5‰ based on the mass of cement base material.

[0015] The cement reinforcing agent provided by this invention comprises, by mass percentage: 55%–70% activator, 20%–35% complexing agent, and 5%–10% dispersant. In this cement reinforcing agent, the activator can stimulate the hydration activity of blast furnace slag or fly ash in cement, increasing its hydration activity and thus improving cement strength; the complexing agent can promote the dissociation of slag and fly ash structures and form hydrated calcium silicate with a low Ca / Si ratio, thereby improving the structural strength of cement; the dispersant can fully disperse early hydration products, forming a uniform and dense three-dimensional hydration product structure, which is beneficial to the early and later strength of hardened cement paste. Application examples show that when the cement reinforcing agent provided by this invention is applied to cement, it can effectively stimulate the hydration activity of slag and fly ash. When slag or fly ash replaces 4–6 percentage points of cement clinker, the quality and performance of the cement remain essentially unchanged, thereby effectively reducing cement costs and benefiting environmental protection. Detailed Implementation

[0016] The present invention provides a cement reinforcing agent comprising, by weight percentage: 55%–70% activator, 20%–35% complexing agent, and 5%–10% dispersant.

[0017] The cement reinforcing agent provided by this invention comprises 55% to 70% activator by weight percentage, preferably 55% to 65%, and most preferably 60%. This invention effectively utilizes the activator's activating effect on the mixed materials by limiting the mass percentage of the activator.

[0018] In this invention, the activator is preferably calcined alum or sodium silicate pentahydrate. By limiting the type of activator, this invention can further improve the hydration activity of the mixed materials, promote their hydration process, accelerate the hydration of cement clinker minerals, and improve the structural strength of the hydration products.

[0019] In this invention, the cement reinforcing agent provided by this invention comprises 20% to 35% complexing agent, more preferably 25% to 30%, by mass percentage. By limiting the mass percentage of the complexing agent, this invention effectively promotes the structural dissociation of the mixed material and forms hydrated calcium silicate products with a low Ca / Si ratio.

[0020] In this invention, the complexing agent is preferably trisodium aminetriacetate or disodium ethylenediaminetetraacetate. This invention, by selecting the above-mentioned complexing agents, promotes the activation of structural dissociation in slag and fly ash, thereby further improving the structural strength of the hydration products.

[0021] In this invention, the cement reinforcing agent provided by this invention comprises 5% to 10% dispersant, more preferably 8%, by mass percentage. This invention, by limiting the mass percentage of the dispersant, effectively enables it to fully disperse the hydration products.

[0022] In this invention, the dispersant is preferably sodium hexametaphosphate or sodium pyrophosphate. By selecting the above-mentioned types of dispersants, this invention can further promote the activation of structural dissociation in slag and fly ash, enabling the early hydration products to be fully dispersed and forming a uniform and dense three-dimensional hydration product structure, which is beneficial to the early and later strength development of hardened cement paste.

[0023] In this invention, the cement reinforcing agent provided by this invention preferably comprises 55% to 65% calcined alum, 25% to 35% trisodium nitrilotriacetate, and 5% to 10% sodium hexametaphosphate by weight percentage, and more preferably comprises 60% calcined alum, 30% trisodium nitrilotriacetate, and 10% sodium hexametaphosphate.

[0024] In this invention, the cement reinforcing agent preferably comprises 55% to 65% sodium silicate pentahydrate, 25% to 35% disodium ethylenediaminetetraacetate, and 5% to 10% sodium hexapyrophosphate by mass percentage, and more preferably comprises 60% sodium silicate pentahydrate, 32% disodium ethylenediaminetetraacetate, and 8% sodium hexapyrophosphate.

[0025] The activator in the cement reinforcing agent provided by this invention can activate the hydration activity of blast furnace slag or fly ash in cement, thereby improving the structural strength of cement; the complexing agent can promote the dissociation of slag and fly ash structures to improve the structural strength of cement; the dispersant can fully disperse early hydration products to form a uniform and dense three-dimensional hydration product structure, which is beneficial to the early and later strength of hardened cement paste.

[0026] The present invention also provides the application of the cement reinforcing agent described in the above technical solution in cement, wherein the cement reinforcing agent is mixed with cement base material and cement grinding aid and then ground to obtain cement;

[0027] Alternatively, the cement reinforcing agent can be made into powder and then mixed with powdered cement to obtain cement; the powdered cement is obtained by grinding cement base material and cement grinding aid; the amount of cement reinforcing agent added is 2% to 5‰ based on the mass of cement base material.

[0028] The present invention does not impose any particular limitation on the mixing method of the cement reinforcing agent with the cement base material and the cement grinding aid; any mixing method known in the art can be used.

[0029] The present invention does not impose any particular limitation on the method of preparing the cement reinforcing agent into powder; any method known in the art can be used.

[0030] This invention does not impose any special requirements on the grinding equipment; any grinding equipment well-known in the art can be used. In this invention, the grinding equipment is a combined cement grinding system of a roller press and a ball mill.

[0031] The cement test mill of this invention adopts a standard laboratory cement test mill commonly used in the field, with a specification of Ф500×500mm.

[0032] In this invention, the cement reinforcing agent in the cement is preferably 2‰ to 5‰ by mass percentage, more preferably 3‰. This invention achieves optimal reinforcement effect and cost by controlling the amount of cement reinforcing agent added.

[0033] The cement reinforcing agent provided by this invention can be applied to cement to effectively activate the hydration activity of slag and fly ash. When slag or fly ash replaces 4 to 6 percentage points of cement clinker, the quality and performance of the cement remain basically unchanged, thereby effectively reducing the cost of cement and benefiting environmental protection.

[0034] To further illustrate the present invention, the following detailed description is provided in conjunction with embodiments and application examples, but these should not be construed as limiting the scope of protection of the present invention.

[0035] Example 1

[0036] A cement reinforcing agent, by weight percentage, comprises the following components: 65% calcined alum, 26% sodium nitrilotriacetate, and 9% sodium hexametaphosphate.

[0037] Application Example 1:

[0038] A type of cement is prepared from cement base material, cement grinding aid, and cement reinforcing agent as described in Example 1: the amount of cement reinforcing agent added is 5‰ based on the mass of the cement base material; the cement base material is composed of the following components by mass percentage: 74.5% cement clinker, 17.5% slag, 4.5% desulfurized gypsum, and 3.5% limestone; the amount of HX-JR3001 type high-efficiency cement grinding aid added is 0.5‰ based on the mass of the cement base material.

[0039] The preparation method is as follows: Cement reinforcing agent, cement base material and cement grinding aid are added to a cement test mill with specifications of Ф500×500mm and ground for 25min to obtain cement.

[0040] Application Example 2:

[0041] The difference between this implementation and Application Example 1 is that: cement clinker is 73.5%, slag is 18.5%, and the rest is the same as Application Example 1.

[0042] Application Example 3:

[0043] The difference between this implementation and Application Example 2 is that the cement clinker content is 72.5%, the slag content is 19.5%, and the rest is the same as Application Example 2.

[0044] Example 2:

[0045] A cement reinforcing agent, by weight percentage, comprises the following components: 65% sodium silicate pentahydrate, 26% disodium ethylenediaminetetraacetate, and 9% sodium pyrophosphate.

[0046] Application Example 4:

[0047] A type of cement is prepared from cement base material, cement grinding aid and cement reinforcing agent as described in Example 2: the amount of cement reinforcing agent added is 5‰ based on the mass of cement base material; by mass percentage, it consists of the following components: 74.5% cement clinker, 17.5% slag, 4.5% desulfurized gypsum and 3.5% limestone; the amount of HX-JR3001 type high-efficiency cement grinding aid added is 0.5‰ based on the mass of the cement base material.

[0048] The preparation method is as follows: Cement reinforcing agent, cement base material and cement grinding aid are added to a cement test mill with specifications of Ф500×500mm and ground for 25min to obtain cement.

[0049] Application Example 5:

[0050] The difference between this application example and application example 4 is that the cement clinker is 73.5% and the slag is 18.5%, while the rest is the same as application example 4.

[0051] Application Example 6

[0052] The difference between this application example and application example 5 is that the cement clinker is 72.5% and the slag is 19.5%, while the rest is the same as application example 5.

[0053] Comparative Example 1:

[0054] A type of cement is prepared from cement base material and cement grinding aid: by mass percentage, it consists of the following components: 78.5% cement clinker, 13.5% slag, 4.5% desulfurized gypsum and 3.5% limestone; based on the mass of the cement base material, the addition amount of the HX-JR3001 type high-efficiency cement grinding aid is 0.5‰.

[0055] The preparation method is as follows: Mix all raw materials and add them to a cement test mill with a specification of Ф500×500mm. Grind for 25 minutes to obtain cement.

[0056] Comparative Example 2:

[0057] The difference between Comparative Example 2 and Application Example 1 is that Comparative Example 2 uses Type M cement reinforcing agent, whose formula is: 35 parts aluminum sulfate, 12 parts silicon dioxide, 11 parts alumina, 6 parts limestone powder, 10 parts fly ash, 7 parts naphthalene sulfonate, and 17 parts cement anti-seepage and waterproofing agent. The rest is the same as in Application Example 1.

[0058] Comparative Example 3:

[0059] The difference between Comparative Example 3 and Application Example 2 is that Comparative Example 3 uses Type M cement reinforcing agent, whose formula is: 35 parts aluminum sulfate, 12 parts silicon dioxide, 11 parts alumina, 6 parts limestone powder, 10 parts fly ash, 7 parts naphthalene sulfonate, and 17 parts cement anti-seepage and waterproofing agent. The rest is the same as in Application Example 2.

[0060] Comparative Example 4:

[0061] The difference between Comparative Example 4 and Application Example 3 is that Comparative Example 4 uses Type M cement reinforcing agent, whose formula is: 35 parts aluminum sulfate, 12 parts silicon dioxide, 11 parts alumina, 6 parts limestone powder, 10 parts fly ash, 7 parts naphthalene sulfonate, and 17 parts cement anti-seepage and waterproofing agent. The rest is the same as Application Example 3.

[0062] The cements prepared in Examples 1 to 6 and the cements prepared in Comparative Examples 1 to 4 of this invention were tested using the following methods: cement (raw material) fineness test method (sieve analysis method) (GB / T 1345-2005); cement standard consistency water requirement, setting time and soundness test method (GB / T 1346-2005); cement mortar fluidity test standard (GB / T 2419-2005); and cement mortar strength test method (GB / T 17671-1999). The results are shown in Table 1.

[0063] Table 1. Cement properties with different cement reinforcing agents (slag as the admixture)

[0064]

[0065]

[0066] As shown in Table 1:

[0067] (1) Compared with Comparative Example 1, the cement made with the cement reinforcing agent of the present invention has almost the same 3d and 28d strength, thereby achieving the purpose of replacing part of the cement clinker with slag and reducing the cost of cement.

[0068] (2) The 3-day and 28-day strengths of cement prepared by adding the cement reinforcing agent of Example 2 of the present invention are higher than the strengths of cement prepared by adding the cement reinforcing agent of Example 1 of the present invention at the same age, indicating that the cement reinforcing agent of Example 2 of the present invention has a better reinforcing effect on slag than the cement reinforcing agent of Example 1 of the present invention.

[0069] (3) When the cement material mix ratio is the same, the cement made by adding M-type reinforcing agent has a significantly lower 28-day strength than the cement made by using the cement reinforcing agent of this invention.

[0070] The above results demonstrate that the cement reinforcing agents of Examples 1 and 2 of the present invention can effectively activate the hydration activity of slag, and the reinforcing effect of the cement reinforcing agent of Example 2 is particularly obvious, thereby achieving the purpose of replacing cement clinker with a mass fraction of 4-6% and reducing cement costs.

[0071] Application Example 7:

[0072] A type of cement is prepared from cement base material, cement grinding aid, and cement reinforcing agent as described in Example 1: the amount of cement reinforcing agent added is 5‰ based on the mass of the cement base material; and it is composed of the following components by mass percentage: 76% cement clinker, 16.5% fly ash, 4% desulfurized gypsum, and 3.5% limestone; and the amount of HX-JR3001 type high-efficiency cement grinding aid added is 0.5‰ based on the mass of the cement base material.

[0073] The preparation method is as follows: Cement reinforcing agent, cement base material and cement grinding aid are added to a cement test mill with specifications of Ф500×500mm and ground for 25min to obtain cement.

[0074] Application Example 8:

[0075] The difference between this implementation and Application Example 7 is that the cement clinker content is 75%, the fly ash content is 17.5%, and the rest is the same as in Application Example 7.

[0076] Application Example 9:

[0077] The difference between this implementation and Application Example 7 is that the cement clinker content is 74%, the fly ash content is 18.5%, and the rest is the same as in Application Example 7.

[0078] Application Example 10:

[0079] A type of cement is prepared from cement base material, cement grinding aid and cement reinforcing agent as described in Example 2: based on the mass of cement base material, the amount of cement reinforcing agent added is 5‰, and it is composed of the following components by mass percentage: 76% cement clinker, 16.5% fly ash, 4% desulfurized gypsum and 3.5% limestone. Based on the mass of the cement base material, the amount of HX-JR3001 type high-efficiency cement grinding aid added is 0.5‰.

[0080] The preparation method is as follows: Cement reinforcing agent, cement base material and cement grinding aid are added to a cement test mill with specifications of Ф500×500mm and ground for 25min to obtain cement.

[0081] Application Example 11:

[0082] The difference between this implementation and Application Example 10 is that the cement clinker content is 75%, the fly ash content is 17.5%, and the rest is the same as in Application Example 10.

[0083] Application Example 12:

[0084] The difference between this implementation and Application Example 11 is that: cement clinker is 74%, fly ash is 18.5%, and the rest is the same as in Application Example 11.

[0085] Comparative Example 5:

[0086] A type of cement is prepared from cement base material and cement grinding aid; by mass percentage, the cement base material consists of the following components: 80% cement clinker; 12.5% ​​fly ash; 4% desulfurized gypsum and 3.5% limestone; based on the mass of the cement base material, the addition amount of the HX-JR3001 type high-efficiency cement grinding aid is 0.5‰.

[0087] The preparation method is as follows: Mix all raw materials and add them to a cement test mill with a specification of Ф500×500mm. Grind for 25 minutes to obtain cement.

[0088] Comparative Example 6:

[0089] The difference between Comparative Example 6 and Application Example 7 is that Comparative Example 6 uses Type M cement reinforcing agent, whose formula is: 35 parts aluminum sulfate, 12 parts silica, 11 parts alumina, 6 parts limestone powder, 10 parts fly ash, 7 parts naphthalene sulfonate, and 17 parts cement anti-seepage and waterproofing agent. The rest is the same as Application Example 7.

[0090] Comparative Example 7:

[0091] The difference between Comparative Example 7 and Application Example 8 is that Comparative Example 7 uses Type M cement reinforcing agent, whose formula is: 35 parts aluminum sulfate, 12 parts silica, 11 parts alumina, 6 parts limestone powder, 10 parts fly ash, 7 parts naphthalene sulfonate, and 17 parts cement anti-seepage and waterproofing agent. The rest is the same as Application Example 8.

[0092] Comparative Example 8:

[0093] The difference between Comparative Example 8 and Application Example 9 is that Comparative Example 8 uses Type M cement reinforcing agent, whose formula is: 35 parts aluminum sulfate, 12 parts silica, 11 parts alumina, 6 parts limestone powder, 10 parts fly ash, 7 parts naphthalene sulfonate, and 17 parts cement anti-seepage and waterproofing agent. The rest is the same as Application Example 9.

[0094] The cements prepared in Examples 7-12 and the cements prepared in Comparative Examples 5-8 of this invention were tested using the following methods: cement (raw meal) fineness test method (sieve analysis method) (GB / T 1345-2005); cement standard consistency water requirement, setting time and soundness test method (GB / T 1346-2005); cement mortar fluidity test standard (GB / T 2419-2005); and cement mortar strength test method (GB / T 17671-1999). The results are shown in Table 2.

[0095] Table 2. Cement properties with different cement reinforcing agents (fly ash is used as the admixture).

[0096]

[0097] As shown in Table 2:

[0098] (1) Compared with Comparative Example 5, the cement made with the cement reinforcing agent of the present invention has almost the same 3d and 28d strength, thereby achieving the purpose of replacing part of the cement clinker and reducing the cost of cement.

[0099] (2) The 3-day and 28-day strengths of cement made by adding the cement reinforcing agent of Example 1 of the present invention are higher than the strengths of cement made by adding the cement reinforcing agent of Example 2 of the present invention at the same age, indicating that the cement reinforcing agent of Example 1 of the present invention has a better reinforcing effect on fly ash than the cement reinforcing agent of Example 2 of the present invention.

[0100] (4) When the cement material mix ratio is the same, the cement made by adding M-type reinforcing agent has a significantly lower 28-day strength than the cement made by using the cement reinforcing agent of this invention.

[0101] The above results demonstrate that the cement reinforcing agents of Examples 1 and 2 of the present invention can effectively activate the hydration activity of fly ash, with the cement reinforcing agent of Example 1 showing a particularly significant reinforcing effect, thereby achieving the goal of replacing part of the cement clinker and reducing cement costs.

[0102] Application Example 13:

[0103] The difference between this application example and Application Example 4 is that this one uses a combined cement grinding system of a roller press and ball mill from a cement company in Jiangxi Province. Each material mix ratio is continuously produced for more than 72 hours to ensure thorough mixing and reduction. The rest is the same as in Application Example 4. The results are shown in Table 3.

[0104] Application Example 14:

[0105] The difference between this application example and Application Example 5 is that this example uses a combined cement grinding system of roller press and ball mill from a cement company in Jiangxi Province. Each material mix ratio is continuously produced for more than 72 hours to ensure thorough mixing and reduction. The rest is the same as in Application Example 5. The results are shown in Table 3.

[0106] Application Example 15:

[0107] The difference between this application example and Application Example 6 is that this example uses a combined cement grinding system of a roller press and ball mill from a cement company in Jiangxi Province. Each material mix ratio is continuously produced for more than 72 hours to ensure thorough mixing and reduction. The rest is the same as in Application Example 6. The results are shown in Table 3.

[0108] Comparative Example 9:

[0109] The difference between this comparative example and Comparative Example 1 is that this comparative example uses a combined cement grinding system of roller press and ball mill from a cement company in Jiangxi Province. Each material mix ratio is continuously produced for more than 72 hours to ensure thorough mixing and reduction. The rest is the same as Comparative Example 1.

[0110] The cements prepared in Examples 13-15 of this invention and the cement prepared in Comparative Example 9 were tested using the following methods: cement (raw meal) fineness test method (sieve analysis method) (GB / T 1345-2005); cement standard consistency water requirement, setting time and soundness test method (GB / T 1346-2005); cement mortar fluidity test standard (GB / T 2419-2005); and cement mortar strength test method (GB / T 17671-1999). The results are shown in Table 3.

[0111] Table 3. Industrial test results of cement performance with added cement reinforcing agent (from a company in Jiangxi Province)

[0112]

[0113]

[0114] As shown in Table 3:

[0115] (1) Compared with Comparative Example 9, the strength of the cement prepared by the present invention is almost the same as that of Comparative Example 9, which further demonstrates that the cement reinforcing agent of the present invention can replace part of the cement clinker and reduce the cost of cement.

[0116] (2) Compared with the laboratory group, under the same material mix ratio and cement reinforcing agent admixture ratio, the cement strength of the industrial test samples was slightly higher than that of the laboratory test results. This is because the grinding media in the industrial mill is more reasonable, resulting in a better particle size distribution of the cement than the cement obtained by grinding in the laboratory test mill.

[0117] Application Example 16:

[0118] The difference between this application example and Application Example 1 is that this example uses a combined cement grinding system of a roller press and ball mill from a cement company in Fujian Province. Each material mix ratio is continuously produced for more than 72 hours to ensure thorough mixing and reduction. The rest is the same as in Application Example 1. The results are shown in Table 4.

[0119] Application Example 17:

[0120] The difference between this application example and Application Example 2 is that this one uses a combined cement grinding system of a roller press and ball mill from a cement company in Fujian Province. Each material mix ratio is continuously produced for more than 72 hours to ensure thorough mixing and reduction. The rest is the same as in Application Example 2. The results are shown in Table 4.

[0121] Application Example 18:

[0122] The difference between this application example and Application Example 3 is that this example uses a combined cement grinding system of a roller press and ball mill from a cement company in Fujian Province. Each material mix ratio is continuously produced for more than 72 hours to ensure thorough mixing and reduction. The rest is the same as in Application Example 3. The results are shown in Table 4.

[0123] Comparative Example 10:

[0124] The difference between this application example and Comparative Example 5 is that a combined cement grinding system of roller press and ball mill from a cement company in Fujian Province was used. Each material mix ratio was continuously produced for more than 72 hours to ensure thorough mixing and reduction. The rest is the same as Comparative Example 5. The cements prepared in Application Examples 16-18 and the cement prepared in Comparative Example 10 were tested using the following methods: cement (raw meal) fineness test method (GB / T1345-2005); cement standard consistency water requirement, setting time and soundness test method (GB / T1346-2005); cement mortar fluidity test standard (GB / T 2419-2005); and cement mortar strength test method (GB / T 17671-1999). The results are shown in Table 4.

[0125] Table 4. Industrial test results of cement performance with added cement reinforcing agent (from a company in Fujian).

[0126]

[0127] As shown in Table 4:

[0128] (1) Compared with Comparative Example 10, the strength of the cement prepared by the present invention is almost the same as that of Comparative Example 10, which further shows that the cement reinforcing agent of the present invention can replace part of the cement clinker and reduce the cost of cement.

[0129] (2) Compared with the laboratory group, under the same material mix ratio and cement reinforcing agent admixture ratio, the cement strength of the industrial test samples was slightly higher than that of the laboratory test results. This is because the grinding media in the industrial mill is more reasonable, resulting in a better particle size distribution of the cement than the cement obtained by grinding in the laboratory test mill.

[0130] In summary, the laboratory and industrial test results demonstrate that the cement reinforcing agent of this invention can effectively activate the hydration activity of slag and fly ash. When slag or fly ash replaces 4-6 percentage points of cement clinker, the output of the cement mill remains essentially unchanged or slightly increases, while the quality and performance of the cement remain essentially unchanged. Therefore, this cement reinforcing agent not only effectively reduces cement costs but also has significant social and environmental benefits.

[0131] Compared with type M cement reinforcing agent, the cement reinforcing agent of the present invention has a significantly better post-reinforcing effect; in addition, the cement reinforcing agent of the present invention has fewer components, a simpler formula, and is easier to produce.

[0132] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A cement reinforcing agent, comprising, by weight percentage: 55%–70% activator, 20%–35% complexing agent, and 5%–10% dispersant; The activator is calcined alum or sodium silicate pentahydrate; The complexing agent is trisodium triamcinolone or disodium ethylenediaminetetraacetate; The dispersant is sodium hexametaphosphate or sodium pyrophosphate.

2. The cement reinforcing agent according to claim 1, characterized in that, By weight percentage, it includes 55%–65% calcined alum, 25%–35% trisodium nitrilotriacetate, and 5%–10% sodium hexametaphosphate.

3. The cement reinforcing agent according to claim 1, characterized in that, By mass percentage, it includes 55%–65% sodium silicate pentahydrate, 25%–35% disodium ethylenediaminetetraacetate, and 5%–10% sodium hexapyrophosphate.

4. The application of the cement reinforcing agent according to any one of claims 1 to 3 in cement, characterized in that, Cement is obtained by mixing cement reinforcing agent with cement base material and cement grinding aid and then grinding the mixture. Alternatively, the cement reinforcing agent can be made into powder and then mixed with ground cement to obtain cement; the ground cement is obtained by grinding cement base material and cement grinding aid; the amount of cement reinforcing agent added is 2‰~5‰ based on the mass of cement base material.

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