水分浸透・中性化

[1338] 異なる湿度条件下におけるOPCとLC³の加速炭酸化過程の比較

CHENG Luge¹, 栗原諒¹, YANG Zhenli¹, 丸山一平¹ (1.東京大学)

キーワード：LC3、relative humidity、carbonation

This study investigates the carbonation behavior of ordinary Portland cement (OPC) and limestone-calcined clay cement (LC3) under accelerated carbonation at 30%, 60%, and 90% relative humidity (RH). At 60% RH, vaterite is the predominant carbonation product in both OPC and LC3. At 90% RH, OPC primarily forms calcite and continues carbonation, whereas LC3 shows early carbonation cessation due to pore-blocking by tightly nucleated silica gel and calcium carbonate (CC) precipitation, and limited ion transport by the honeycomb-like morphology of C-S-H.