ECO-FRIENDLY AND EARLY-STRENGTH EXPANSIVE GROUT ADDITIVE, CAPABLE OF EARLY TENSIONING AN ANCHOR BODY DUE TO EXCELLENT INITIAL STRENGTH, A GROUP MATERIAL, AND AN ANCHOR METHOD FOR REINFORCING THE GROUND USING THE SAME

摘要

PURPOSE: An eco-friendly and early-strength expansive grout additive is provided to improve the mobility and workability of a group material, to obtain compressive strength, required for tensioning an anchor in 1-3 days, and to prevent group materials from being separated.;CONSTITUTION: An eco-friendly and early-strength expansive grout additive comprises: 3-90 weight% of lime; 3-90 weight% of a curing accelerator which is selected from sodium sulfate, potassium sulfate, aluminum sulfate, nitrous acid calcium, iron sulfate, or their mixture; 0.1-3 weight% of a volume expanding agent; 3-20 weight% of one or more water-reducing agents which are selected from a naphthalene-based compound, a melamine-based compound, a polycarboxylic acid-based compound, or their mixture; and 3-30 weight% of iron sulfate.;COPYRIGHT KIPO 2011