Grouting material
A grouting material which comprises an ultrafine particle material having a maximum particle size of 15 micrometer or less, containing 3 to 40% by mass of cement clinker, 60 to 97% by mass of and blast-furnace slag, 0.5 to 3 parts by mass of gypsum in terms of SO 3 based on 100 parts by mass of the total amount of cement clinker and blast-furnace slag, and further comprises (i) 0.7 to 7 parts by mass of calcium-aluminate-based rapid-hardening admixture, (ii) 0.01 to 0.13 parts by mass of setting retarder, and (iii) 0.2 to 1.0 parts by mass of high-performance water-reducing agent, based on 100 parts by mass of the ultrafine particle material can maintain high injectability for long, and rapidly starts to set after injected to thereby exhibit a good short-term strength.
1. A grouting material which comprises an ultrafine particle material having a maximum particle size of 15 micrometer or less
containing
3 to 40% by mass of cement clinker,
60 to 97% by mass of blast-furnace slag
0.5 to 3 parts by mass of gypsum in terms of SO 3 based on 100 parts by mass of the total amount of cement clinker and blast-furnace slag,
and further comprises
(i) 0.7 to 7 parts by mass of calcium-aluminate-based rapid-hardening admixture
(ii) 0.01 to 0.13 parts by mass of setting retarder, and
(iii) 0.2 to 1.0 parts by mass of high-performance water-reducing agent, based on 100 parts by mass of the ultrafine particle material.
2. The grouting material according to claim 1 , wherein the (i) calcium-aluminate-based rapid-hardening admixture contains 12CaO.7Al 2 O 3 .
3. The grouting material according to claim 2 , wherein the (i) calcium-aluminate-based rapid-hardening admixture further contains anhydrite.
4. The grouting material according to claim 1 , wherein the (ii) setting retarder is oxycarboxylic acid or a salt thereof.
5. The grouting material according to claim 1 , wherein the (iii) high performance water reducing agent is a melamine sulfonic acid-based condensation product.
6. The grouting material according to claim 1 , wherein the (i) calcium-aluminate-based rapid-hardening admixture contains 12CaO.7Al 2 O 3 and anhydrite, the (ii) setting retarder is sodium gluconate and the (iii) high performance water-reducing agent is a melamine sulfonic acid-based condensation product.
7. The grouting material according to claim 1 , which in form of a slurry having a water content of 40% by mass starts setting in 2 hours or more and completes setting in 10 hours or less.
8. The grouting material according to claim 1 , which in form of a slurry having a water content of 40% by mass has a compressive strength of 2N/mm 2 or more at 1 day age.