In this study, to improve the required properties of tile cement mortar such as excellent water retention capacity (WRC), workability, open time, sag resistance, and tile adhesive strength, tile cement mortars containing the several additives with different ratio were compared and analyzed. By adding small amount of synthesized starch to hydroxypropyl methylcellulose (HPMC) which is used for improving WRC, the decrease of moisture evacuation from mortar surface was observed and the workability of mortar was improved with long open time. Polyacrylamide (PAAm) and ethylenevinyl acetate (EVAc) were also added in order to increase the adhesion of tile. As a results, the saggings of mortar itself and tile were decreased and the adhesive strength of mortar between base and tile was enhanced. By adding melment, the workability was improved by increasing the fluidity of mortar. It is postulated that the properties of tile cement mortar was improved by adding 0.80∼1.20% of HPMC, 0.10∼0.15% of starch, 0.001∼0.015% of PAAm, 0.05∼0.10% of EVAc and 0.003∼0.005% of melment to the cement mortar.

타일을 부착시키는 tile 전용 cement mortar가 갖추어야 하는 물성인 우수한 보수성, 작업성, open time, 처짐저항성과 타일접착강도 등을 향상시키기 위해 본 연구에서는 mortar에 첨가하는 혼화제들의 혼합비율을 달리하였을 때 나타나는 특성을 비교 분석하였다. Mortar의 보수성 효과를 주는 hydroxypropylmethylcellulose에 소량의 합성 starch을 첨가해 줌으로써 Mortar는 보수성을 유지하면서 겉마름이 적게되었고, open time이 길어져 작업성이 향상되었다. 타일의 접착강도를 높이기 위해 polyacrylamide와 ethylenevinyl acetate을 첨가하여 mortar 자체 및 타일의 처짐을 줄였고, 바탕면과 타일과의 mortar 접착력을 증대시켰다. 이와 함께 melment의 첨가로 mortar에 유동성을 주어 작업성을 향상시켰다. 이들 첨가제의 필요량은 cement량에 대해 hydroxypropyl methylcellulose는 0.80∼1.20%, starch 0.10∼0.15%, polyacrylamide 0.001∼0.015%, ethylenevinyl acetate 0.05∼0.10% 및 melment 0.003∼0.005%의 혼합비율일 때 tile cement mortar의 물성이 향상됨을 알 수 있었다.