CN1078572C

CN1078572C - Grinding-helping and reinforcing additive of cement

Info

Publication number: CN1078572C
Application number: CN 99111285
Authority: CN
Inventors: 宋延秋
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-06
Filing date: 1999-08-06
Publication date: 2002-01-30
Anticipated expiration: 2019-08-06
Also published as: CN1240774A

Abstract

The present invention relates to a grinding-helping and reinforcing additive of cement, which is composed of 1 to 98 of triethylamine trisulfonate, 1 to 98 of ethanol diethylamine disulfonate and 1 to 98 of diethanol-ethylamine monosulfonate according to weight percentage; the additive accounts for 0.01 to 0.5 of the cement according to weight percentage. The additive can increase the output by 10 to 25% per hour of a cement mill table, the power consumption is reduced by 10 to 25%, the intensity within 3 days can be increased by 20 to 50%, the intensity within 28 days is increased by 10 to 20%, the consumption of a cement grinding element per ton is reduced by 10 to 25%, and the storage time is prolonged by 10%. The effect of the same performance of improved cement strength can also be obtained by adding the additive before concrete construction.

Description

Cement clinker grinding aid

The present invention belongs to the field of cement producing technology and concrete constructing technology.

The existing cement or concrete reinforcing additive generally has the defects of large addition amount and influence on tissue production. Especially, the addition of the additive increases the power consumption in the cement grinding process and reduces the machine-hour output of the mill, namely, the additive also has the defect of mill lag. And has no function of prolonging the storage life of cement.

The invention aims to develop a cement clinker grinding aid which can enhance the medium-and-long-term strength of cement and prolong the storage period of the cement under the condition of small addition amount, and particularly has the grinding aid effect on the cement grinding process.

The cement clinker grinding aid consists of triethyl amine trisulfonate, disulfonic acid radical-ethanol radical-diethyl amine and monosulfonic acid radical-diethyl alcohol radical-ethyl amine. The weight percentages of the components are as follows: 1-98 parts of triethyl amine trisulfonate, 1-98 parts of disulfonic acid monoethanol diethyl amine and 1-98 parts of monosulfonic acid diethanol monoethyl amine. The clinker grinding aid accounts for 0.01-0.5 of the cement in percentage by weight.

After the clinker grinding aid is used, the machine-hour yield of cement produced by a grinding machine can be increased by 10-25%, and the power consumption of grinding of cement is reduced by 10-25%. Compared with cement without clinker grinding aid added: the three-day strength of the cement can be improved by 20-50%, the twenty-eight-day strength of the cement can be improved by 10-2O%, and the consumption of a ton of cement grinding body can be reduced by 10-25%. Under the condition of ensuring equal cement strength, the clinker grinding aid can prolong the cement storage period by 10 percent, has the advantages of low cost and high benefit, can improve the addition amount of mixed materials in cement, and can reduce the cost of cement per ton by more than 15 yuan. The clinker grinding aid is doped before the concrete construction, so that the concrete can also obtain the effect of improving the performance of the cement strength.

The first embodiment is as follows: triethanolamine and sulfuric acid react to produce tri-sulfonic acid ester amine, disulfonic acid radical-ethanol radical-diethyl ester amine and sulfonic acid radical-diethyl alcohol radical-ethyl ester amine. The chemical formula is as follows: ；； . In the embodiment, the clinker grinding aid comprises the following components in percentage by weight: 70-80 parts of tri-ethyl trisulfonate amine, 10-20 parts of disulfonic acid radical-ethanol-based diethyl ester amine and 5-10 parts of monosulfonic acid radical-diethyl ester amine. The clinker grinding aid accounts for 0.04-0.08 of the cement in percentage by weight.

Example two: in this embodiment, the clinker grinding aid is composed of the following components in percentage by weight: 60-70 parts of tri-ethyl trisulfonate amine, 20-30 parts of disulfonic acid mono-ethanol-based diethyl ester amine and 10-20 parts of mono-sulfonic acid diethylene glycol-based diethyl ester amine. The clinker grinding aid accounts for 0.02-0.12 of the cement in percentage by weight.

Example three: in this embodiment, the clinker grinding aid is composed of the following components in percentage by weight: 40-60 parts of tri-ethyl ester amine trisulfonate, 20-40 parts of disulfonic acid mono-ethanol-based diethyl ester amine and 20-30 parts of mono-sulfonic acid diethylene glycol-based diethyl ester amine. The clinker grinding aid accounts for 0.02-0.20 of the cement in percentage by weight.

Example four: in this embodiment, the clinker grinding aid is composed of the following components in percentage by weight: 30-40 parts of tri-ethyl trisulfonate amine, 30-50 parts of disulfonic acid mono-ethanol-based diethyl ester amine and 20-40 parts of mono-sulfonic acid diethylene glycol-based diethyl ester amine. The clinker grinding aid accounts for 0.02-0.3 of the cement in percentage by weight.

Example five: in this embodiment, the clinker grinding aid is composed of the following components in percentage by weight: 10-30 parts of triethyl amine trisulfonate, 30-60 parts of disulfonic acid monoethanol diethyl amine and 30-60 parts of monosulfonic acid diethanol monoethyl amine. The clinker grinding aid accounts for 0.02-0.4 of the cement in percentage by weight.

Example six: in this embodiment, the clinker grinding aid is composed of the following components in percentage by weight: 5-20 parts of tri-ethyl trisulfonate amine, 70-80 parts of disulfonic acid radical-ethanol-based diethyl ester amine and 10-20 parts of monosulfonic acid radical-diethyl ester amine. The clinker grinding aid accounts for 0.02-0.5 of the cement in percentage by weight.

Example seven: in this embodiment, the clinker grinding aid is composed of the following components in percentage by weight: 1-98 parts of triethyl amine trisulfonate, 1-98 parts of disulfonic acid monoethanol diethyl amine and 1-98 parts of monosulfonic acid diethanol monoethyl amine. The clinker grinding aid accounts for 0.01-0.5 of the concrete in percentage by weight. Before construction, the clinker grinding aid is added into water and uniformly stirred, then concrete is filled in the clinker grinding aid, and construction can be carried out after uniform stirring.

The principle of the clinker grinding aid forgrinding aid, increasing strength, reducing cost and prolonging storage period in cement grinding is described as follows:

1. grinding aid principle of clinker grinding aid in cement:

after cement is fed into a grinding machine without being mixed with the cement clinker, the mixture of the cement clinker mixture and gypsum generates static electricity due to violent frequent complex friction and impact among materials, a grinding body and a cylinder in the grinding process, and the materials with the static electricity are adsorbed on the surfaces of the steel balls and the grinding body, so that the steel balls and the grinding body generate a buffer action in the impact or friction process, the utilization rate of mechanical energy in the grinding process is reduced, and the yield of the grinding machine is reduced. After the triethyl trisulfonate amine is added into the material of the pre-ground cement material, during the grinding process, the triethyl trisulfonate amine has one trivalent nitrogen radical as excellent surfactant and can eliminate static charge produced during the grinding process fast, and has certain adsorption capacity, so that it may be adsorbed onto the surface of material fast to avoid adhesion between the material and the material, and may permeate fast into the cracks of the grains to reduce the 'healing' effect of molecular force and promote the expansion of cracks in the grains during work doing outside to raise the grinding efficiency.

2. Improving the strength of cement and the addition of mixed materials

When the triethanolamine trisulfonate exists in the cement, the pH value of the aqueous solution in the cement paste is gradually increased due to the gradual hydration of the added water, and the triethanolamine trisulfonate is gradually decomposed into triethanolamine N (C)₂H₄OH)₃And sulfuric acid H₂SO₄Wherein the decomposed sulfuric acid will rapidly react with the product hydrogen after hydration of cementCalcium oxide Ca (OH)₂The calcium sulfate reacts quickly to generate nascent state calcium sulfate, has larger dispersity compared with the gypsum mixed with the ingredients, is easier to react with CaA tricalcium aluminate to generate ettringite crystals which are mutually cemented with C-S-H, so that the early strength of the cement is improved. Because the tri-sulfoacid tri-ethyl ester amine has slow release function, after the cement paste is hydrated, the undecomposed tri-sulfoacid tri-ethyl ester amine can gradually react with calcium hydroxide Ca (OH) in capillary pores₂The solution reacts to generate calcium sulfate dihydrate crystal CaSO₄·2H₂O，Gradually blocking capillary pores in a filled cement structure, leading the structure of a cement specimen to be more compact, increasing the later strength of cement, and having the following reaction equation: ； . Decomposed triethanolamine molecule N (C)₂H₄OH)₃It plays a catalytic role in the hydration process of cement and is hydrated with the Ca generated by the cement²⁺、AL³⁺、Fe³⁺Plasma reaction to generate water soluble complex ion to make C₃A、C₄The dissolving speed of AF plasma is improved, the reaction speed of calcium alum seeds formed between the AF plasma and gypsum is accelerated, and the strength of a test body is improved. After the clinker grinding aid is used, the early strength and the later strength of a cement member are improved, so that the addition amount of a mixed material of cement can be increased and the production cost can be reduced under the condition that the clinker grinding aid has the same strength as that of standard cement. Note: the reference cement refers to the cement without the addition of the clinker grinding aid.

3. Reduce the consumption of cement balls per ton

The output per machine hour of the same mill is improved in a certain period of time, so that the power consumption of ton cement is reduced, the utilization rate of mechanical energy of the mill is improved in the same period of time, and the times of impact grinding of steel balls are correspondingly reduced, so that the loss of ton cement grinding bodies is correspondingly reduced, and the cost of the grinding process is reduced.

4. Extended shelf life of cement

The connection state of cement production and market determines the storage period of cement, and the cement is easy to absorb external moisture and carbon dioxide CO in the storage process₂The cement is gradually hardened and hardened, the use value of the cement is lost, the normal storage period of the cement is mainly influenced by the storage environment, the air humidity and the packaging quality, the variety and the quality of the cement are also factors influencing the cement, and relatively, the higher the clinker content and the higher the calcium oxide content, the shorter the storage period; the finer the fineness is, the larger the specific surface area is, the shorter the storage period is; the greater the ambient humidity, the shorter the storage period; the worse the packaging quality, the cement andthe larger the contact area of air, the shorter the storage period. Under the condition of certain conditions, after the cement is mixed with a certain amount of triethylammonium trisulfonate, the triethylammonium trisulfonate is an ester compound, and after the triethylammonium trisulfonate is mixed into the cement, the triethylammonium trisulfonate is uniformly distributed on the surface of cement particles under the homogenization action of agrinding machine to form a protective layer, and under the condition of small water content, the triethylammonium trisulfonate has a certain passivation and separation effect to prevent easy-hydration minerals such as CaA tricalcium aluminate, CaS tricalcium silicate and the like in the cement from directly contacting with air, so that the triethylammonium trisulfonate has the property of prolonging the storage time of the cement.

The action principle of the disulfonic acid radical-ethanol-base diethyl ester amine and the monosulfonic acid radical-ethanol-base diethyl ester amine in the cement is the same as that of the trisulfonic acid triethyl ester amine.

Claims

1. A cement clinker grinding aid is characterized by comprising triethyl amine trisulfonate, disulfonic acid monoethanol diethyl amine and monosulfonic acid diethanol monoethyl amine, wherein the percentage by weight of the triethyl amine trisulfonate, the disulfonic acid monoethanol diethanol diethyl amine and the monosulfonic acid diethanol monoethyl amine is as follows: 1-98 parts of triethyl amine trisulfonate, 1-98 parts of disulfonic acid monoethanol diethyl amine and 1-98 parts of monosulfonic acid diethanol monoethyl amine.

2. The cement clinker grinding aid of claim 1, wherein the clinker grinding aid accounts for 0.01-0.5 weight percent of the cement.

3. The cement clinker grinding aid of claim 1, wherein the clinker grinding aid accounts for 0.01-0.5 weight percent of the concrete.