阅读说明：本技术 一种提高水泥后期强度的专用助磨剂 (Special grinding aid for improving later strength of cement ) 是由 李维 陶从喜 曾荣 何坤富 滕灼光 彭蓉 于 2020-05-08 设计创作，主要内容包括：本发明公开了一种提高水泥后期强度的专用助磨剂,属于建筑材料领域,包括二乙醇单异丙醇胺含量35％、葡钠6％、酒石酸4％、羟基乙叉二磷酸7％、六偏磷酸钠3％、洁净水45％、焦磷酸钠2％,碳纤维1.5％、烷基糖苷占总量的3％、聚合甘油2％和二甘醇1.5％。本发明显著提高P.O水泥的后期强度；显著的助磨效果,提高台产、降低水泥磨电耗；P.O水泥的缓凝效果明显,延长水泥凝结时间；掺量小,在5/万掺量时能够达到较好的工作性能；命长,能保持性能达4个月以上。(The invention discloses a special grinding aid for improving later strength of cement, belonging to the field of building materials and comprising 35% of diethanol monoisopropanolamine, 6% of sodium gluconate, 4% of tartaric acid, 7% of hydroxyethylidene diphosphate, 3% of sodium hexametaphosphate, 45% of clean water, 2% of sodium pyrophosphate, 1.5% of carbon fiber, 3% of alkyl glycoside, 2% of polymerized glycerol and 1.5% of diethylene glycol. The invention obviously improves the later strength of P.O cement; the grinding aid has obvious grinding aid effect, improves the bench yield and reduces the power consumption of a cement mill; P.O the cement has obvious retardation effect and prolongs the setting time of the cement; the mixing amount is small, and the better working performance can be achieved at 5/ten thousand mixing amount; long service life and can keep the performance for more than 4 months.)

1. The special grinding aid for improving the later strength of cement is characterized in that: comprises 30-40% of grinding aid, 8-12% of coagulation regulator and 50-60% of strength enhancer.

2. The special grinding aid for improving the later strength of cement according to claim 1, wherein the grinding aid comprises the following components in percentage by weight: the grinding aid is diethanol monoisopropanolamine, and the diethanol monoisopropanolamine accounts for 35% of the total amount.

3. The special grinding aid for improving the later strength of cement according to claim 2, wherein the grinding aid comprises the following components in percentage by weight: the thickening time regulator comprises sodium gluconate and tartaric acid, wherein the sodium gluconate accounts for 6% of the total amount, and the tartaric acid accounts for 4% of the total amount.

4. The special grinding aid for improving the later strength of cement according to claim 3, wherein the grinding aid comprises the following components in percentage by weight: the enhancer comprises hydroxyethylidene diphosphoric acid, sodium hexametaphosphate and clean water, wherein the hydroxyethylidene diphosphoric acid accounts for 7% of the total amount, the sodium hexametaphosphate accounts for 3% of the total amount, and the clean water accounts for 45% of the total amount.

5. The special grinding aid for improving the later strength of cement according to claim 4, wherein the grinding aid comprises the following components in percentage by weight: the sodium pyrophosphate and the carbon fiber are further included, wherein the sodium pyrophosphate accounts for 2% of the total amount, and the carbon fiber accounts for 1.5% of the total amount.

6. The special grinding aid for improving the later strength of cement according to claim 5, wherein the grinding aid comprises the following components in percentage by weight: also included are alkyl glycosides, which account for 3% of the total.

7. The special grinding aid for improving the later strength of cement according to claim 6, wherein the grinding aid comprises the following components in percentage by weight: also comprises polymerized glycerin and diethylene glycol, wherein the polymerized glycerin accounts for 2 percent of the total amount, and the diethylene glycol accounts for 1.5 percent of the total amount.

Technical Field

The invention relates to the field of building materials, in particular to a special grinding aid for improving later strength of cement.

Background

Molasses is added into triethanolamine serving as a traditional grinding aid component to prepare the enhanced grinding aid, and more than 5% of clinker can be replaced by mixed materials on the premise of improving the strength of cement. The triethanolamine sulfate salt is synthesized by salinizing triethanolamine by using sulfamic acid as a raw material, the preparation cost of the grinding aid prepared by sulfating modification is reduced, and the distribution of cement particles is improved, so that the compressive strength of the cement is improved. The amino phenol grinding aid is developed, and the novel grinding aid is prepared by mainly using phloroglucinol, formaldehyde and ammonia water as raw materials through a Mannich reaction and heating, so that the compressive strength of cement mortar 28d can be improved under the condition of low mixing amount.

1. The triethanolamine-molasses grinding aid requires a large mixing amount to achieve the strengthening effect, so that the product cost is too high, and the molasses has poor retarding effect on cement and cannot achieve the effect of adjusting the setting time;

2. the synthetic grinding aid is prepared by adding sulfate functional groups on an original molecular chain, so that the grinding aid effect can be obviously improved, but the synthetic process is complex, the effect fluctuation is large after active groups are introduced into different batches, and the overall stability of the synthetic grinding aid is poor;

3. the novel aminophenol grinding aid has little influence on the condensation time, formaldehyde is contained in the synthesis reaction and is carried out under the heating condition, and the heat released after the raw materials are mixed easily causes the formaldehyde to volatilize, so that poisoning is caused, and the preparation safety risk exists.

Disclosure of Invention

The invention aims to provide a special grinding aid for improving the later strength of cement, and solves the technical problems in the background technology. The grinding aid effect is ensured, the yield is increased, and the compressive strength of the cement can be improved; the mixing amount is small, the good working performance can be achieved at about 5/ten thousand, and the working capacity of adjusting the cement setting time is achieved.

A special grinding aid for improving later strength of cement comprises 30-40% of grinding aid, 8-12% of coagulation regulator and 50-60% of strength enhancer.

The grinding aid is diethanol monoisopropanolamine, and the diethanol monoisopropanolamine accounts for 35% of the total amount.

The thickening time regulator comprises sodium gluconate and tartaric acid, wherein the sodium gluconate accounts for 6% of the total amount, and the tartaric acid accounts for 4% of the total amount.

The enhancer comprises hydroxyethylidene diphosphoric acid, sodium hexametaphosphate and clean water, wherein the hydroxyethylidene diphosphoric acid accounts for 7% of the total amount, the sodium hexametaphosphate accounts for 3% of the total amount, and the clean water accounts for 45% of the total amount.

The technical scheme also comprises sodium pyrophosphate and carbon fibers, wherein the sodium pyrophosphate accounts for 2% of the total amount, and the carbon fibers account for 1.5% of the total amount.

The above scheme further comprises alkyl glycoside, which accounts for 3% of the total amount.

The scheme also comprises polymerized glycerol and diethylene glycol, wherein the polymerized glycerol accounts for 2% of the total amount, and the diethylene glycol accounts for 1.5% of the total amount.

By adopting the technical scheme, the invention has the following technical effects:

the invention obviously improves the later strength of P.O cement; the grinding aid has obvious grinding aid effect, improves the bench yield and reduces the power consumption of a cement mill; P.O the cement has obvious retardation effect and prolongs the setting time of the cement; the mixing amount is small, and the better working performance can be achieved at 5/ten thousand mixing amount; the grinding aid has long service life, can keep the performance for more than 4 months, takes the diethanol monoisopropanolamine as a grinding aid component, selects the sodium gluconate and the tartaric acid as a retarding component, superposes the retarding functions of the sodium gluconate and the tartaric acid to ensure that the grinding aid has the coagulation regulating working performance, takes the hydroxyethylidene diphosphate and the sodium hexametaphosphate as the phosphate, and introduces the phosphate into the alcohol amine component after compounding the hydroxy ethylidene diphosphate and the sodium hexametaphosphate to replace the strengthening effect of a single group. The effective components are compounded into the enhanced grinding aid.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.