| abstract |
A kind of preparation method of concrete admixture, including：Step 1, it is stirred after chitosan, allyl polyethenoxy ether, single polyalkylene glycol acrylate ester, methacrylic acid, methacrylic anhydride being mixed；Step 2, it is stirred when initiator is added dropwise, reaction 1 ~ for 24 hours, obtain concrete admixture；The dosage of the initiator is the 1% ~ 2% of reactant gross mass.Preparation method provided by the invention is simple, and production cost is relatively low, and not only water-reducing rate is high for the additive produced, and can be obviously improved concrete easily isolate, excreting water phenomenon.The present invention greatly improves the workability of concrete under the collective effect of each component, can improve the mobility of concrete, prevents premature dry condensation. |