dc.description.abstract | Hydrotalcite ( HT) is known to have an existing ion adsorption capacity of an anionic clay, Hydrotalcite is composed of cation layer and the interlayer anions, commonly composed of Mg-Al hydrotalcite - carbonate hydrotalcite, can be extracted by artificial or natural, is also the hydration process of hydration products of slag. The adsorption principle is brought by cation attract positively charged anion binding a stable compound. One of the high-temperature treatment to restore the ion adsorption capacity hydrotalcite way, the product called magnesium aluminum oxide (MgAlO4) .
This study investigate the commercial calcined hydrotalcite formed by the Mg-Al oxides, and produced by alkali-activated slag product Hydrotalcite after the chloride ion adsorption behavior.
The results showed that the Mg-Al oxides have certain adsorption capacity to chloride and hydroxide. Mg-Al oxides used in the cement paste, the adsorption of chloride will increases by Mg-Al oxides usage increases. In Alkali activated slag paste, the chloride ion adsorption increased with increasing specimen curing period and use of sodium hydroxide as alkali activator, magnesium silicate additives of magnesium, magnesium / aluminum molar ratio of 5.0, the less of free chloride, and magnesium carbonate magnesium additive, magnesium / aluminum molar ratio of 5.0, amount of unmovable chloride dissolved higher .XRD observation can be found using the ratio of sodium hydroxide, hydrotalcite generate situations are obvious. | en_US |