TY - JOUR AU - Kaba, Peter AU - Sato, Shushi AU - Yamamoto, Masahiro AU - Takahashi, Keikichi PY - 2022/06/01 Y2 - 2024/03/28 TI - INFLUENCE OF FREEZING AND THAWING CONDITIONS AT INITIAL AGE ON THE STRENGTH DEVELOPMENT OF MORTARS JF - GEOMATE Journal JA - INTERNATIONAL JOURNAL OF GEOMATE VL - 22 IS - 94 SE - Articles DO - UR - https://geomatejournal.com/geomate/article/view/3124 SP - 128-134 AB - <p>Agricultural irrigation canals are widespread across Japan and extensively used in productive farming. There is an urgent need to extend the service life of these facilities to reduce their maintenance cost. Therefore, the purpose of this study is to experimentally explore the effect of low-temperature history on the long-term strength of polymer cement mortar, especially during the early stage of the mortar's life, thus, 3 days of age. In this study, two types of polymer cement mortar were used: powdered ordinary polymer cement mortar and powdered fast-hardening polymer cement mortar, thus 100P and 100PS respectively. The experimental results indicate that the compressive strength analysis of the polymer cement mortar is lower than the standard cured, whenever the initial curing process was subjected to rapid temperature changes (-10ºC to 5ºC) every 3 hours; subsequently, its purpose of extending the service life of agricultural canals cannot be fulfilled. We again noted that the compressive strength of the specimens subjected to low temperature during the initial curing period does not show positive strength on the 91st day, and depending on the timing of the repair work, the waterway may lack sufficient compressive strength. Finally, under a constant low-temperature environment where freezing and thawing do not occur (-10 ºC), the fast-setting polymer cement mortar shows sufficient strength up to 91 days. The results from this work will provide a reference to experimentally clarify the effect of low-temperature history on the long-term compressive strength of typical polymer cement mortar.</p> ER -