| 摘要 |
<p>PURPOSE: A method for manufacturing high-quality recycled aggregates is provide to produce high quality recycled aggregates by reacting sodium carbonate and calcium hydroxide such that calcium carbonate is precipitated, and thereby porousifying the aggregates and cement paste interfaces. CONSTITUTION: A method for manufacturing high quality recycled aggregates comprises the steps of: manufacturing a sodium hydroxide aqueous solution by dissolving sodium hydroxide in washing water; manufacturing a sodium carbonate aqueous solution by dissolving carbon dioxide in the sodium hydroxide aqueous solution; washing recycled aggregates with the sodium carbonate aqueous solution; and separating cement paste by grinding the recycled aggregates with low speed wet-triturating apparatus using sulfuric water as processing water. [Reference numerals] (1) Before reaction; (AA,CC) Time (sec); (BB) Time</p> |
