MORTAR SUPPLY METHOD TO UPPER LAYER OF A STRUCTURE, MORTAR SUPPLY SYSTEM, AND CHANGEOVER VALVE OF MORTAR TRANSPORTATION PIPE LINE

摘要

PROBLEM TO BE SOLVED: To reduce lifting cost of mortar material to reduce construction cost when supplying mortar to the upper layer of a large scale rockwork.;SOLUTION: A low viscosity mortar having a low mixing ratio of cement than high viscosity mortar is prepared on the ground. The low viscosity mortar is force-fed by means of a mortar pump 7 up to a mixing area 3 installed at the same level with the upper layer of a rockwork R and cement is post-mixed with the low viscosity mortar to raise the mixing ratio and supplied to a specified placing position of the rockwork R.;COPYRIGHT: (C)2000,JPO