| 摘要 |
<p>Provided are waterproof admixtures for concrete and mortar, which increase waterproof performance of concrete, impart proper expandability to concrete to inhibit formation of cracks, and are improved in seawater resistance, salt resistance, and freezing and thawing resistance. The waterproof admixtures for concrete and mortar comprise 10-60wt% of natural inorganic mineral consisting of tuff, volcanic ash, and perlite and comprising amorphous silica, philipsite, and sodium calcium aluminum silicate as elements, 10-30wt% of silica fume, 10-40wt% of fly ash or blast furnace slag fine powder, 5-25wt% of sulfates, and further 0.5-3.5wt% of water-soluble anionic surfactant. The silica fume has a silicon oxide content of 80% or more and is amorphous.</p> |
