Multifunctional concrete curing agent, as well as preparation method and application thereof

The invention relates to a multifunctional concrete curing agent, as well as a preparation method and application thereof. The curing agent is prepared from the components in percentage by weight: 15to 20 percent of nanosilicon dioxide, 0.5 to 1.2 percent of sodium metasilicate, 0.2 to 0.8 percent of sodium hydroxide, 0.1 to 0.2 percent of polyethylene oxide, 0.05 to 0.15 percent of surface active agent, 0.05 to 0.15 percent of stabilizer, 0.15 to 0.25 percent of sulfate, 0.25 to 0.35 percent of phosphate, and 77.8 to 83.12 percent of deionized water. The multifunctional concrete curing agentis sprayed when a fresh concrete is initially set, so that a maintenance enhancement function is realized. Compared with the prior art, the multifunctional concrete curing agent provided by the invention has the advantages of simple production process, low cost, outstanding protection effect, no toxicity and no pollution; the curing agent function is realized at the beginning of concrete pouring,and the protection agent f