The Properties of Repair Cement Mortar with Insulation Performance under the Composite Deterioration Conditions

Abstract

In this study, we studied on the durability of restorative cement mortar for deteriorated concrete at complex deteriorated conditions as variation of temperature and of humidities. We made a comparison between restorative materials with insulation function and restorative materials without insulation function in items of compressive and bending strength and permeability of water, durability for carbonation, salt damage, diffusion coefficient of salt at complex deterioration conditions like change of temperature, change of humidity, For insulation, we used close-pore type Alumino-Silicate lightweight aggregate and substituted 12 wt% and 15 wt% out of original restorative cement mortar without insulation function.As a result, it was found that original restorative cement mortar without insulation function fail to meet Korean Standard on polymer modified cement mortar for maintenance in concrete structure, but restorative cement mortar with insulation function is in contentment Korean Standard to meet excellent than restorative materials without insulation function for durability at complex deteriorated conditions.

A Method for Determining Ultimate Grouting Pressure for Reinforcement of Masonry Arch Dam with Mortar Deterioration: A Case Study

“…The deterioration rate of mortar is much higher than that of block stones, which may cause the damage of an arch dam in serious cases. In recent years, plenty of profound studies have been carried out on the deterioration of cement mortar [ 3 , 4 , 5 , 6 ]. For areas with cold winters and large temperature differences between day and night, mortar deterioration is dominated by the effect of freezing-thawing cycles [ 7 , 8 , 9 ].…”