Concrete antalkaline agent

The invention discloses a concrete antalkaline agent which comprises the following components in parts by weight: 3-5 parts of nano-silica, 1-2 parts of polyvinyl alcohol, 10-15 parts of silica fume, 20-30 parts of mineral powder and 48-66 parts of low calcium fly ash, totaling 100 parts. The invention has the advantages that the concrete antalkaline agent is prepared by introducing a plurality of active materials, calcium hydroxide generated in a cement hydration process is rapidly absorbed, and high-strength micro-crystals are produced, so that the compaction of mortar and concrete members is greatly improved. Meanwhile, by introducing resin materials, the speed of allowing calcium hydroxide to diffuse to the surface is reduced, and a saltpetering phenomenon on the concrete surface is effectively relieved. 本发明公开了种混凝土抗碱剂，包含按以下重量份配比的各组分：纳米二氧化硅3-5份、聚乙烯醇1-2份、硅灰10-15份、矿粉20-30份、低钙粉煤灰48-66份，各组分总计共100份。本发明的优点是：通过引入多种活性物质配制混凝土抗碱剂，迅速吸收水泥水化过程中产生的氢氧化钙，并生成高强微晶体，使砂浆和混凝土构件的密实性大大提高，同时通过引入树脂类物质，降低氢氧化钙向表面扩散的速度，有效缓解混凝土表面的泛碱现象