粉煤灰改良膨胀土路堤试验研究  

Experimental Study on Expansive Soil Embankment Improved by Fly Ash

作　　者：高熙贺[1] Gao Xihe(Yangling Vocation and Technical College, Yangling, Shanxi 712100, China)

机构地区：[1]杨凌职业技术学院,陕西咸阳712100

出　　处：《粉煤灰综合利用》2018年第2期35-38,42,共5页Fly Ash Comprehensive Utilization

摘　　要：对粉煤灰改良膨胀土的改良成效及可行性进行了研究和分析,试验结果表明,随着粉煤灰掺量的增加,膨胀土的塑性以及活性指数、膨胀力、膨胀率乃至膨胀量都逐渐减小,由此表明粉煤灰可以有效对膨胀土浓缩性造成降低影响。经过一定养护期之后的膨胀试验结果表明,随着养护期限的不断递增,膨胀土的膨胀量及膨胀力会随之降低。没有经过养护的膨胀土无侧限抗压强度相对较不明显。在经由养护之后,路堤的土样抗压强度增加,且无侧限抗压强度存在峰值点。The corresponding improvement effect and feasibility of fly ash improved expansive soil was mainly studied in the embankment experiment. It was found that with the continuous increase of fly ash, the plasticity and expansivity, expansivity rate and expansion of expansive soil are gradually reduced, which shows that fly ash has reduced impact on expand Soil concentration. Expansion experiments after a certain curing period show that as the curing period increases, the expansive amount and expansive force of expansive soil decreases. Unconfindd compressive strength of uncured expansive soil is relatively insignificant. After curing, embankment soil sample compressive strength increases, and unconfined compressive strength has a peak point.

关 键 词：粉煤灰 膨胀土 路堤试验 

分 类 号：U416.12[交通运输工程—道路与铁道工程] X773[环境科学与工程—环境工程]