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       魏    東1  ,  張海洋2 ,  李旭瑞2

        ( 1 .  河南省交通建設(shè)技術(shù)中心 ，鄭州 450016 ;  2.  中犇檢測認證有限公司 ，鄭州 450003)

摘   要 ：為了分析石灰摻入對黃土物理力學(xué)與抗凍性能的影響規(guī)律 ，制備了 6 組不同生石灰摻量的改良黃  土試樣 ，測試了其界限含水率 、最優(yōu)含水率 、最大干密度 、抗壓強度 、黏聚力 、內(nèi)摩擦角以及抗凍性能。結(jié)果  表明： 隨著石灰摻量的增大 ，改良黃土塑性指數(shù)呈現(xiàn)先減小后緩慢增大的變化趨勢 ，最優(yōu)含水率逐漸提高 ，最  大干密度逐漸減小 ；改良黃土的抗壓強度 、黏聚力和內(nèi)摩擦角隨石灰摻量的增大而逐漸提高 ；石灰摻入可以有  效改善改良黃土的抗凍性能 ；綜合考慮改良黃土的含水率 、干密度 、抗壓強度 、黏聚力 、內(nèi)摩擦角和抗凍性能， 最佳石灰摻量為 8% 。為相關(guān)工程應(yīng)用提供理論基礎(chǔ)。

關(guān)鍵詞：石灰改良黃土 ；界限含水率 ；抗壓強度 ；抗剪強度 ；凍融循環(huán)

               中圖分類號：U416. 1            文獻標志碼：A 

           

               文章編號： 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

作者簡介： 魏    東  (1984—) ,   男 ，碩士 ，高級工程師 ，

研 究方向：道路橋梁所用材料的試驗檢測。

收稿日期：2024 - 08 - 09