A STUDY ON FUNDAMENTAL PROPERTIES OF ANTI-FREEZING PC GROUT USING LITHIUM NITRITE AND ITS PRACTICALITY

Abstract

 The authors aim to develop an anti-freezing PC grout without heat curing in cold weather. The fluidity and the strength development of the grout using accelerator containing lithium nitrite as a main component at the freezing point immediately after mixing were examined. A full-scale modeling test using polyethylene sheath tube and concrete member were examined to clarify the fulling and strength development in the coldest season. As a result, it was confirmed that the grout using accelerator containing lithium nitrite has a good strength development at the freezing point. From a full scale modeling test, there was no problem in filling the grout into the sheath, and the all test results satisfied the standard value of PC grout.