General description on several qualities of grouting mortar for prestressed concrete members is given in the present report by reference to the results of experiments shown in foreign and domestic papers and obtained by the author.
Main important qualities necessary for the cement grout are faculty of flow, quantity of bleeding, change of volume, compressive strength, bond strength and resisting power for freezing, and the author showed and explained the results of experiments on them, when some kinds of mixing agent which is produced and sold in Japan were applied to the cement grout.
The author suggests that one of the mixing agents suited to the cement grout is “Pozzolith No. 8” manufactured in Japan at present, if engineers want to apply one kind of agent produced in this country to the cement grout with the aim to improve its qualites.
