Scholarlink

<p>As Vietnam’s leading rice-producing region, the Mekong Delta generates vast quantities of rice husk ash (RHA) each year, a by-product which poses significant environmental challenges and demands sustainable management solutions. The soft clayey soil in this region is popular and characterized by low strength and bearing capacity, which adversely affects the development of local infrastructure and necessitates stabilization techniques to improve its performance. This research utilizes RHA, a widely available agricultural by-product in the Mekong Delta, as an additive to enhance the strength of soil–cement mixtures. Soil samples from Ca Mau, Tra Vinh, and Soc Trang provinces were mixed with cement contents of 15% and 20% by wet soil weight and supplemented with RHA at varying proportions of 0%, 5%, 10%, 15%, 20%, and 25% by wet soil weight. The experimental results demonstrate that the unconfined compressive strength (UCS) of the stabilized soil exhibited a marked improvement with the incorporation of rice husk ash (RHA) at an optimal dosage of approximately 10–20%, with the highest enhancement observed when 20% cement is utilized. The samples from Tra Vinh generated higher strength compared to those from Ca Mau and Soc Trang. These findings suggest that the effectiveness of RHA stabilization is governed by both the characteristics of the soft soil and the cement content. Besides, both the strength of the stabilized soil and the optimal RHA content were influenced by the initial clay–water content of the soil samples. Furthermore, the inclusion of RHA in the soil–cement mixture may reduce the elastic modulus of the stabilized soil, affecting its stiffness. The results of this study indicate that RHA is an effective additive for enhancing the engineering properties of soil–cement mixtures, thereby promoting sustainable infrastructure solutions in the Mekong Delta.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Applicability of Rice Husk Ash for Cement-Stabilized Soil in the Mekong Delta, Vietnam

  • 期刊论文

  • 发表日期：

    2025年10月16日

查看全文
  • Nguyen Thanh Duong,
  • Dang Van Phi,
  • Nguyen Van Phong

摘要

As Vietnam’s leading rice-producing region, the Mekong Delta generates vast quantities of rice husk ash (RHA) each year, a by-product which poses significant environmental challenges and demands sustainable management solutions. The soft clayey soil in this region is popular and characterized by low strength and bearing capacity, which adversely affects the development of local infrastructure and necessitates stabilization techniques to improve its performance. This research utilizes RHA, a widely available agricultural by-product in the Mekong Delta, as an additive to enhance the strength of soil–cement mixtures. Soil samples from Ca Mau, Tra Vinh, and Soc Trang provinces were mixed with cement contents of 15% and 20% by wet soil weight and supplemented with RHA at varying proportions of 0%, 5%, 10%, 15%, 20%, and 25% by wet soil weight. The experimental results demonstrate that the unconfined compressive strength (UCS) of the stabilized soil exhibited a marked improvement with the incorporation of rice husk ash (RHA) at an optimal dosage of approximately 10–20%, with the highest enhancement observed when 20% cement is utilized. The samples from Tra Vinh generated higher strength compared to those from Ca Mau and Soc Trang. These findings suggest that the effectiveness of RHA stabilization is governed by both the characteristics of the soft soil and the cement content. Besides, both the strength of the stabilized soil and the optimal RHA content were influenced by the initial clay–water content of the soil samples. Furthermore, the inclusion of RHA in the soil–cement mixture may reduce the elastic modulus of the stabilized soil, affecting its stiffness. The results of this study indicate that RHA is an effective additive for enhancing the engineering properties of soil–cement mixtures, thereby promoting sustainable infrastructure solutions in the Mekong Delta.