POWDER LUBRICANT AND MUD ADDING MATERIAL FOR CIVIL ENGINEERING USE CONTAINING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a powder lubricant, and a mud adding material for civil engineering use containing the same, in particular usable as a propelling lubricant prevented from sticking on the uniform surface of an excavator, clay pressure-shielding mud adding material, mud adding material for continuous wall work, mud adding material for mud water-shielding use, mud adding material for stakes, mud adding material for propelling digging use, or the like.;SOLUTION: The powder lubricant is obtained by adsorbing an oil or liquid surfactant to an oil adsorbent. A 1st version of the mud adding material for civil engineering use is an integrated type one which is obtained by mixing the powder lubricant with a non-swelling mineral such as bentonite, clay or calcium carbonate, and as necessary, a thickening agent or a dehydration- diminishing agent. A 2nd version of the mud adding material is a 2-shot type one for propelling digging use and mud soil pressure-shielding use which is obtained by mixing a 1st liquid prepared by using a mud adding material as a mixture of the powder lubricant and bentonite with a 2nd liquid prepared by dissolving an inorganic gelatinizer or organic thickening agent within a shielding excavator chamber.;COPYRIGHT: (C)2004,JPO