Analysis of cement grinding aids industry's future development path?
China's cement grinding aids business experienced raw material prices, labor costs increase, the market competition intensified, it began to really care about their own future, concerned about the direction of development of grinding aids industry. So, cement grinding aids industry is to continue along the existing direction, or to change the performance of cement additives in the direction of efforts? Here, many scholars advocate the direction of the development of cement additives, and requires the cement standard grinding Agent to additive. This is understandable. Because China's cement industry has fully entered the state of the market economy, many projects require bidding cement companies according to their technical requirements to provide cement, cement requirements in addition to the requirements of these standards set by the user, so cement modifier has a certain Market vitality. In addition, the brief history of the development of cement grinding aids also proves that there is almost no market for the grinding aids to help but not enhance the grinding effect, and the sales are very difficult. Many cement companies have proposed various reforms to grinding aids companies Sexual requirements. Therefore, in order to help the development of grinding aids industry, many people hope that the cement standard can eliminate the effect of grinding aids.
In conclusion, most additives in mind may be various functional additives, including grinding aids. Other than grinding aids, grinding aids, other additives do not help grinding requirements. The author believes that due to historical reasons, the study of cement additives in our country only conducted in the past relatively small range, but in the field of concrete is more common and in-depth. Therefore, it is necessary to carry out this kind of research in the field of cement at present. It not only relates to the development of cement-based materials, but also is a way to make full use of the potential of cement. However, most current cement additives around us are reflowed from concrete admixtures. As we all know, most functional additives have been tested before use, and their impact on concrete has been evaluated. Therefore, the effect of adding functional additives to concrete only occurs in local or individual projects. The use of functional additives in cement production, unless it is designed for a project, otherwise it will face a large number of users, as long as one of the objects out a little problem, even if it is not cement, cement companies are unwilling to accept of. It was pointed out that additives in the European cement standard is an additive, people have already spent, there will be problems? Yes, the European cement standards allow the use of additives, the maximum limit of 1%; if organic, dry basis Not more than 0.5%; if using EN934 series of concrete, mortar or mortar additives, the packaging or invoice should be marked on the standard code of the additive. However, our country's grinding aids enterprise production scale is small, low technology, poor product stability, quality supervision and management capacity is weak, for a long time cement companies only allow the use of grinding aids, but did not use the technical accumulation of additives, the lack of concrete plus Agent-related knowledge and testing capabilities, most companies do not have the current implementation of European standards. Therefore, the current task of grinding aids industry is to return to cement grinding aids standards, honest cement grinding aids standard production.
In fact, China's cement grinding aids standard from 1996 equivalent to the use of the United States cement additive standards began to have been allowed to partially modified (such as the intensity of only the lower limit). JC / T 667-2004 "cement grinding aids" are only used at the time grinding aids generally helpless and harmful to the performance of cement cheap enhancements, cement standards allow a larger amount of grinding aid, increase To help grinding requirements and some performance limitations. Now, the cement standard has been reduced by the amount of grinding aids, and indicators in the increase of chloride ion limit. In my opinion, some other indicators in the grinding aids standard also have room for relaxation. Where the cement standard itself has been indexed, some indicators of construction performance (and ease of measurement) when used for cement may be limited by the requirements of the various works when used. As for the cement standard is not provided, due to the presence of grinding aids may affect the long-term performance of cement some indicators should be increased or strengthened to prevent the emergence of similar "poisoning milk incident" problem.