Early-strength superplasticizer has relatively good performance and is widely used in the construction industry. However, there is a problem that cannot be ignored. In high-temperature environments, the product is prone to corruption with the addition of sugar retardant materials and other factors. Deterioration leads to product performance degradation and affects concrete production. So, what are the factors that affect the performance of early-strength superplasticizer? See the following introduction:
1. The influence of sugar retarder
The main retarder used in early-strength water reducing agent is: sodium glucose, sugar, citric acid wait. In industrial production, Aspergillus niger is commonly used to ferment sodium gluconate. However, if the production control is not strict during the production of sodium gluconate, there will inevitably be residues of glucose and Aspergillus niger, which will affect the early strength of the water-reducing agent at high temperatures. performance impact.
2. Influence of microorganisms
Microorganisms can grow mold on the surface of a certain polymer under appropriate temperature and humidity conditions. In a hot and humid environment, the secretions of mold will cause substances to decompose and transform into alcohols, organic acids and other substances. These substances in turn provide nutrients for the growth of mold, allowing mold to parasitize and reproduce, aggravating biodegradation.
3. Effect of temperature
As the temperature increases and the movement of macromolecular chains intensifies, chain thermal decomposition will occur, resulting in accelerated polymer degradation, early strength and water loss. The agent should be stored in a cool and ventilated place. It is recommended to use newly produced water-reducing agents as soon as possible.
The factors that affect the performance of early-strength superplasticizers mainly include the points introduced above. I hope everyone can understand and master them so that they can be avoided as much as possible when using them.
High-concentration water-reducing admixtures are concrete admixtures that can maintain the slump of concrete basically unchanged and reduce mixing water consumption. They can reduce unit water consumption, reduce unit cement consumption, and save cement. So high-concentration alkali What are the advantages of aqueous agents? Let’s take a look.
There are differences between high-concentration water-reducing agents and general water-reducing agents, so they must be treated differently when used, and some precautions must be paid attention to and must not be confused. Early-strength water-reducing admixtures still have problems with cement adaptability. In addition, the quality of sand and stone materials and the quality of admixtures such as fly ash and mineral powder have a certain impact on the performance of concrete mixed with early-strength water-reducing agents. They should attract attention. The problem of excessive dosage of early strength water reducing agent. When the amount is exceeded, undesirable phenomena such as segregation, bleeding, hardening, and excessive air content will occur. Long-term contact between the early-strength superplasticizer and iron materials should be avoided. Since early-strength superplasticizer products are often acidic and will react slowly when in contact with iron products for a long time, the color of the product may even darken or turn black, resulting in a decline in product performance. It is recommended to use polyethylene plastic buckets or stainless steel storage to ensure product storage. stability.
The application of high-concentration water-reducing agents has greatly reduced unit water consumption and saved cement. It has gradually become an indispensable material for high-quality concrete. </p
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