| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a grout material having a gel time (30-60 min) appropriate as prevention of manhole floating, and imparting such degree of strength that prevents manhole floating when solidified. <P>SOLUTION: This grout material for preventing manhole floating includes cement, sodium silicate, sodium dihydrogen phosphate and water, where (1) the Blaine value of the cement is ≥7,000 cm<SP POS="POST">2</SP>/g; (2) the sodium silicate has a mole ratio indicated by SiO<SB POS="POST">2</SB>/Na<SB POS="POST">2</SB>O of 2.2-2.7; (3) the content of SiO<SB POS="POST">2</SB>in the sodium silicate is 64-110 kg per 1,000 L of the grout material for preventing manhole floating; and (4) the content of the sodium dihydrogen phosphate in terms of anhydride is 2.6-3.2 kg per 1,000 L of the grout material for preventing manhole floating. <P>COPYRIGHT: (C)2013,JPO&INPIT |
