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硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (2): 582-591.DOI: 10.16552/j.cnki.issn1001-1625.2025.0889

• 资源综合利用 • 上一篇    下一篇

基于响应面法的矿渣-电石渣-脱硫石膏固化淤泥质土力学性能研究

王冬冬1(), 张帅伟2(), 宋新江1, 徐海波1, 尹祥1, 乔磊鑫3   

  1. 1.安徽省(水利部淮河水利委员会)水利科学研究院,安徽省水科学与智慧水利重点实验室,蚌埠 233000
    2.宁波中淳高科股份有限公司,宁波 315100
    3.国机中兴工程咨询有限公司,郑州 450007
  • 收稿日期:2025-09-03 修订日期:2025-10-24 出版日期:2026-02-20 发布日期:2026-03-09
  • 通信作者: 张帅伟,工程师。E-mail:zhshuaiwei@sina.com
  • 作者简介:王冬冬(1995—),男。主要从事固化土技术方面的研究。E-mail:wangdongdong9512@163.com
  • 基金资助:
    安徽省自然科学基金(2208085US01);安徽省自然科学基金(2208085US18);安徽省自然科学基金(2408055US004);安徽省水科院科技攻关项目(KJGG202302);安徽省水利科技项目(SLKJ202501-1)

Mechanical Properties of Silty Clay Stabilized with GGBS-Carbide Slag-Desulfurization Gypsum Based on Response Surface Methodology

WANG Dongdong1(), ZHANG Shuaiwei2(), SONG Xinjiang1, XU Haibo1, YIN Xiang1, QIAO Leixin3   

  1. 1. Anhui and Huaihe River Institute of Hydraulic Research,Anhui Provincial Key Laboratory of Water Science and Intelligent Water Conservancy,Bengbu 233000,China
    2. ZCONE High-Tech Pile Industry Holdings Co. ,Ltd. ,Ningbo 315100,China
    3. Sinomach Zhongxing Engineering Consulting Co. ,Ltd. ,Zhengzhou 450007,China
  • Received:2025-09-03 Revised:2025-10-24 Published:2026-02-20 Online:2026-03-09

摘要:

淤泥质土在我国广泛分布,因含水率高、承载力低,难以直接用于工程建设。为改善淤泥质土性能,本文以矿渣、电石渣和脱硫石膏为固化剂,采用响应面法中的Box-Behnken design(BBD)数值分析,研究三者掺量对淤泥质土力学性能的影响规律并确定最优配比;再通过对比干湿作用下黄原胶固化土的强度与质量损失率,验证最优配比的有效性;最后结合SEM分析固化机理。结果表明,养护7 d后,随着矿渣和电石渣含量的增大,淤泥质土的无侧限抗压强度先增大后减小。养护28 d后,随着电石渣和脱硫石膏掺量的增加,淤泥质土的无侧限抗压强度先增加后下降。最优掺量为矿渣18.43%(质量分数,下同)、电石渣9.13%、脱硫石膏4.06%,该配比下强度与耐久性优于黄原胶固化土。固化剂的掺入导致水化硅酸钙(C-S-H)、水化硅铝酸钙(C-A-S-H)及钙矾石等凝胶产物生成,试样颗粒得到胶结与包裹,驱动孔隙结构优化与密实度增强,进而促进宏观层面的土体强度与耐久性能的提升。

关键词: 矿渣, 脱硫石膏, 电石渣, 响应面法, 淤泥质土

Abstract:

Silt clay is widely distributed in China, yet its high water content and low bearing capacity make it unsuitable for direct use in engineering. To enhance its properties, this study employed ground granulated blast furnace slag (GGBS), carbide slag, and desulfurization gypsum as stabilizers. Using the Box-Behnken design (BBD) within the response surface methodology, the influence of the dosages of these three stabilizers on the mechanical properties of silt clay was investigated, and the optimal mix proportion was determined. The effectiveness of this optimal proportion was verified by comparing the strength and mass loss rate of clay stabilized with xanthan gum under dry-wet cycles. Furthermore, scanning electron microscopy (SEM) was utilized to elucidate the curing mechanism. The results indicate that under 7 d curing, the unconfined compressive strength (UCS) of the silt clay initially increases and then decreases with increasing dosages of GGBS and carbide slag. Under 28 d curing, with the increase in the admixture amounts of carbide slag and desulfurization gypsum, the UCS of silt clay first increases and then decreases. The optimal dosages are determined as 18.43% (mass fraction) for GGBS, 9.13% for carbide slag, and 4.06% for desulfurization gypsum. Under this optimal proportion, the strength and durability are superior to those of clay stabilized with xanthan gum. The incorporation of the stabilizer leads to the formation of gel products such as calcium silicate hydrate (C-S-H), calcium aluminosilicate hydrate (C-A-S-H), and ettringite. The sample particles are cemented and encapsulated, which drives the optimization of pore structure and the enhancement of compactness, thereby promoting the improvement of soil strength and durability at the macro level.

Key words: ground granulated blast furnace slag, desulfurization gypsum, carbide slag, response surface methodology, silty clay

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