Performance evaluation and curing-time conversion of cement-stabilized soil under simulated field-curing conditions in cold regions

作者：Junfeng Sun, Haitao Zhang, Wenbin Wang, Mingyang Yu, Jianan Yang · 发表于：Engineering Research Express · 年份：2026 · DOI：10.1088/2631-8695/ae95b8 · 研究领域：Concrete Properties and Behavior、Concrete and Cement Materials Research、Grouting, Rheology, and Soil Mechanics

Abstract To address the mismatch between actual field curing environments and standard laboratory curing for cement-stabilized soil in cold regions, which may lead to biased performance evaluation and inaccurate curing-period determination, a daily staged temperature–relative humidity characterization method was proposed, and a programmed laboratory curing scheme for simulated field curing was established. Based on meteorological records from Heilongjiang Province, China, from 1990 to 2023, Harbin and Mohe were selected as representative regions. The 24 h temperature–relative humidity cycle during the construction season was divided into four stages, and region-specific, time-dependent curing parameters were defined accordingly. Comparative tests were then conducted to evaluate the unconfined compressive strength, splitting strength, drying shrinkage, and thermal shrinkage of cement-stabilized soil under standard curing and simulated field-curing conditions. The stage-dependent effects of temperature and relative humidity on strength development and the corresponding curing-time conversion relationships were also analyzed. Relative to standard curing, 7 d of simulated field curing increased unconfined compressive strength by 26.7%–66.7% and splitting strength by 30.8%–69.2%, while reducing the drying shrinkage coefficient by 7.0%–16.5% and the thermal shrinkage coefficient by 28.7%–34.7%. After 5 d of simulated field curing, the evaluated short-term strength and shrinkage ind...