| abstract |
PROBLEM TO BE SOLVED: To reduce the kneading load at the initial stage of kneading a cement kneaded product using a polycarboxylic acid-based polymer having a polyoxyalkylene in a side chain and fine silica having an average particle size of 10 μm or less in combination. SOLUTION: A cement additive comprising a substance that releases calcium ions into water, a polycarboxylic acid polymer having a polyoxyalkylene in a side chain, and fine silica. A cement kneaded product containing cement, a substance that releases calcium ions into water, a polycarboxylic acid polymer having a polyoxyalkylene in a side chain, and fine silica. |