Field Construction Technology and Effect Evaluation of Loess Improved by LM-1 Curing Agent and Cement Composite

To address the issues of inadequate construction process adaptability and the lack of a rapid on-site evaluation system for loess improved by the LM-1 cement-based curing agent in practical engineering, this study systematically carried out material mix proportion design, construction process detailing, compaction degree testing, unconfined compressive strength (UCS) tests of the stabilized mixture, and in-situ light dynamic penetration tests (DPTs) based on a loess road test section in the Dingyuan area. The results show that the mix proportion of 1.5% LM-1 + 10% cement + 88.5% raw loess meets the 7-day UCS design requirement, with a water stability coefficient of 92.9%, indicating excellent water stability, and an average compaction degree of 96.6%. After 7 days of curing, the penetration blow count exceeded 130, indicating that the stabilized loess base layer possesses high penetration resistance and is generally in a dense state. The research findings fill the technical gap in the field application of the LM-1 cement-based curing agent in loess engineering, establish referable construction quality control thresholds and acceptance criteria, and provide theoretical basis and technical support for subgrade slope reinforcement in loess regions.