The quality of polycarboxylate water-reducing agent will be affected by mildew.
The quality of polycarboxylate water-reducing agent will be affected by mildew.The following measures are recommended.
(1) high quality sodium gluconate was selected as the retarding component
At present, there are more manufacturers of sodium gluconate in the market.The manufacturers with strict production control system can effectively control the residual amount of glucose and aspergillus Niger in the production process, so as to reduce the risk of spoilage and deterioration of polycarboxylic acid superplasticizer with sodium gluconate.
(2) compound a certain amount of preservative
In the production process of polycarboxylic acid series water reducer, a certain amount of compound preservatives can effectively prevent the spoilage and deterioration of polycarboxylic acid series water reducer.At present, the preservatives on the market mainly include sodium nitrite, sodium benzoate and isothiazolinone.Among them, isothiazolinone is a relatively wide range, high efficiency, low toxicity, non - oxidizing fungicide, suitable for a wide range of pH value, used for reducing water agent mildew sterilization is more ideal.The added quantity of preservative is kg (0.5-1.5) per ton of polycarboxylic acid series water reducer.
