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       魏    东1  ,  张海洋2 ,  李旭瑞2

        ( 1 .  河南省交通建设技术中心 ，郑州 450016 ;  2.  中犇检测认证有限公司 ，郑州 450003)

摘   要 ：为了分析石灰掺入对黄土物理力学与抗冻性能的影响规律 ，制备了 6 组不同生石灰掺量的改良黄  土试样 ，测试了其界限含水率 、最优含水率 、最大干密度 、抗压强度 、黏聚力 、内摩擦角以及抗冻性能。结果  表明： 随着石灰掺量的增大 ，改良黄土塑性指数呈现先减小后缓慢增大的变化趋势 ，最优含水率逐渐提高 ，最  大干密度逐渐减小 ；改良黄土的抗压强度 、黏聚力和内摩擦角随石灰掺量的增大而逐渐提高 ；石灰掺入可以有  效改善改良黄土的抗冻性能 ；综合考虑改良黄土的含水率 、干密度 、抗压强度 、黏聚力 、内摩擦角和抗冻性能， 最佳石灰掺量为 8% 。为相关工程应用提供理论基础。

关键词：石灰改良黄土 ；界限含水率 ；抗压强度 ；抗剪强度 ；冻融循环

               中图分类号：U416. 1            文献标志码：A 

           

               文章编号： 1005- 8249  (2025)  03- 0145- 05 

                DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .03 .026

WEI Dong¹, ZHANG Haiyang², LI Xurui²

(1. Henan Provincial Transportation Construction Technology Center, Zhengzhou 450016, China;

2. Zhongben Testing and Certification Co., Ltd., Zhengzhou 450003, China)

Abstract: In order to analyze the influence of lime incorporation on physical mechanics and frost resistance of loess, lime modified loess samples with quicklime dosage of 2%, 4%, 6%, 8%, 10% were prepared, and their limit water content, optimal water content, maximum dry density, compressive strength, cohesion, internal friction angle and frost resistance were tested. The results show that: With the increase of lime dosage, the plasticity index of improved loess decreases first and then increases slowly, the optimal water content increases gradually, and the maximum dry density decreases gradually. The compressive strength, cohesion and internal friction angle of the improved loess gradually increased with the increase of lime dosage. The addition of lime can effectively improve the frost resistance of the improved loess. Considering the moisture content, dry density, compressive strength, cohesion, internal friction angle and freezing resistance of the improved loess, the optimal lime dosage is 8%.

Key words: lime improved loess; boundary moisture content; compressive strength; shear strength; freeze-thaw cycle

作者简介： 魏    东  (1984—) ,   男 ，硕士 ，高级工程师 ，

研 究方向：道路桥梁所用材料的试验检测。

收稿日期：2024 - 08 - 09