Article List
- Comparison of TEA TIPA DEIPA three alcohol amine monomer cement grinding aidsWe can draw the following conclusions: (1) TEA, TIPA and DEIPA are good cement grinding aids and have good grinding aids. (2) TEA has excellent early strength improvement, but it can not even weaken the late strength of cement; TIPA can not promote the early strength of cement, but can improve the characteristics of late strength; DEIPA has the advantages of both, for early strength And the late strength has been significantly improved. (3) Due to the prevalence of chloride salt early strength agents and triisopropanolamine compared with triethanolamine, there are many advantages in terms of dispersibility, age enhancement, application conditions and relative cost, so the application is gradually increasing. , an increasingly widespread replacement of triethanolamine. (4) Diethanol monoisopropanolamine has a strong advantage in strength of both early strength and late strength, and will replace triethanolamine and triisopropanolamine.
- Synthesis Technology and Functional Development Status of Polycarboxylate Water Reducing AgentSynthesis Technology and Functional Development Status of Polycarboxylate Water Reducing Agent Polycarboxylate superplasticizer is a kind of cement dispersant used in cement concrete. The early development of the product is a polyester structure with a main chain of methacrylic acid and a side chain of carboxylic acid groups. The polyether structure in which the main chain is a polymerized acrylic acid and the side chain is a polyether, the polycarboxylate water reducing agent is a hydrophilic long side chain having a certain length and number and a main group having a strong polar active group A special molecular structure surfactant composed of chains.
- Polycarboxylate superplasticizer polyether macromonomerPolycarboxylate superplasticizer polyether macromonomer With the steady development of China's concrete water reducing agent manufacturing industry, especially the introduction of relevant national policies, China's concrete water reducing agent manufacturing industry has ushered in a good development opportunity. At present, China's concrete water reducer products are complete in variety and performance, and the output ranks first in the world. The annual growth rate exceeds 20%, meeting the railways, highways, airports, coal mines, municipal engineering, nuclear power plants and dams in recent years.
- Latest research and development progress and market development trend of China's concrete admixture industryLatest research and development progress and market development trend of China's concrete admixture industry The China Building Materials Federation Concrete Admixture Branch conducts a nationwide survey on the production of concrete admixtures every two years. The purpose is to grasp the latest developments in the industry and provide an accurate basis for formulating industry development policies. The investigation has been going on for more than ten years.Product & Technology November 02, 2018
- Effect of several cement grinding aids on properties of fly ash cementThe use of grinding aids can improve the grinding efficiency, improve the performance of cement, and achieve energy saving and emission reduction. At present, with the continuous improvement of the requirements for cement and building materials and the increase in cement production, more and more cement plants have begun to use grinding aids and achieved satisfactory results.
- Overview of research and development of cement grinding aidsAt present, the domestic grinding and grinding agents for research and application are liquid and solid. The formula consists mainly of single or composite products such as amines, polyols and acetates. The basic components are mostly organic surface active substances. Triethanolamine and ethylene glycol are highly polar surfactants and are used as cement grinding aids.
- Research progress and development trend of cement grinding aidsResearch progress and development trend of cement grinding aids The application of cement grinding aids has become more and more intensive with the development of the cement industry. Since domestic cement production accounts for more than 60% of the world's total output, and most of the production cement is taken locally, the research on cement grinding aids has been active, while abroad. Research is relatively mature, in relative。Stagnant state. The new multi-functional grinding aid has always been the development trend of grinding aids. As the price of cement declines, the use of grinding aids has become the focus of attention in the future.
- Research and Development Status of Polycarboxylate Superplasticizers at Home and AbroadHigh-efficiency water reducer was first invented and used by Japanese people. In addition, other economically developed countries are also at the forefront of the world in the development of high-efficiency water reducers. Due to the unbalanced development of concrete technology in China, performance and cost issues have affected the development of polycarboxylate superplasticizers. At present, the research on polycarboxylate superplasticizer in China is still in its infancy, and the synthesis method of polycarboxylate superplasticizer is continuously explored through molecular design. Many units have achieved some better.
- The development status of DEIPA in China and its future development prospects and application in cement grinding aidsThe development status of DEIPA in China and its future development prospects and application in cement grinding aids China's DEIPA is mainly used in cement grinding aids. The dosage is 0.5 to 10,000 parts per million of cement. It can be combined with polyol, triethanolamine and harmless inorganic salts. It can be designed as a high-volume product. It can be used to enhance multi-mixed materials. It can also be designed as a low-volume product for high-grade cement to achieve a comprehensive effect of enhanced production
- Green chemistry concept in polyethylene glycol applicationsGreen chemistry concept in polyethylene glycol applications The response of PEG will continue to attract further exploration of PEG as a solvent.And the support of the catalyst, and the grafting functionalization with the ionic liquid with the advantages of stable and almost no volatility; and the application in combination with microwave technology and biochemistry, which helps to improve the yield of the organic reaction and optimize Reaction time; while PEG as the medium of reaction, it will be more inclined to recycle some expensive metal catalysts。