Mechanical and microstructural properties of cement-stabilized soft clay improved by sand replacement and biochar additive for subgrade applications

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Developments in the Built Environment Pub Date : 2024-10-05 DOI:10.1016/j.dibe.2024.100552

Kittipong Kunchariyakun , Patimapon Sukmak , Gampanart Sukmak , Veena Phunpeng , Suksun Horpibulsuk , Arul Arulrajah , Annan Zhou

{"title":"Mechanical and microstructural properties of cement-stabilized soft clay improved by sand replacement and biochar additive for subgrade applications","authors":"Kittipong Kunchariyakun , Patimapon Sukmak , Gampanart Sukmak , Veena Phunpeng , Suksun Horpibulsuk , Arul Arulrajah , Annan Zhou","doi":"10.1016/j.dibe.2024.100552","DOIUrl":null,"url":null,"abstract":"<div><div>Biochar (BC) is an eco-friendly material produced through coal pyrolysis and can improve the mechanical properties of cement-based construction and building materials. This research study explored the effects of BC and natural sand (Sand) replacement on the improved static and cyclic response of blended hydraulic cement (BHC) stabilized soft clay (SC) as a greener subgrade material. Unconfined compressive strength (UCS), indirect tensile stress (ITS), and indirect tensile fatigue life (ITFL) of the BHC-stabilized SC-BC-Sand samples were examined. Adding 10% BC to the BHC-stabilized samples was found to enhance cementitious products due to its porous structure and high water absorbability. The UCS, ITS and ITFL at this optimum ingredient were improved up to 315%, 347% and 862%, respectively, compared to the BHC-stabilized SC. Fourier transform infrared spectrometer, thermogravimetry differential thermal analysis and a scanning electron microscope with energy-dispersive -ray spectroscopy analyses the BHC-stabilized sample at the optimum ingredient showed the highest C-S-H and Ca(OH)<sub>2</sub> in the pores. This investigation will encourage the utilization of BC to create both environmentally friendly and durable stabilized subgrade material.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"20 ","pages":"Article 100552"},"PeriodicalIF":6.2000,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Developments in the Built Environment","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666165924002333","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Biochar (BC) is an eco-friendly material produced through coal pyrolysis and can improve the mechanical properties of cement-based construction and building materials. This research study explored the effects of BC and natural sand (Sand) replacement on the improved static and cyclic response of blended hydraulic cement (BHC) stabilized soft clay (SC) as a greener subgrade material. Unconfined compressive strength (UCS), indirect tensile stress (ITS), and indirect tensile fatigue life (ITFL) of the BHC-stabilized SC-BC-Sand samples were examined. Adding 10% BC to the BHC-stabilized samples was found to enhance cementitious products due to its porous structure and high water absorbability. The UCS, ITS and ITFL at this optimum ingredient were improved up to 315%, 347% and 862%, respectively, compared to the BHC-stabilized SC. Fourier transform infrared spectrometer, thermogravimetry differential thermal analysis and a scanning electron microscope with energy-dispersive -ray spectroscopy analyses the BHC-stabilized sample at the optimum ingredient showed the highest C-S-H and Ca(OH)₂ in the pores. This investigation will encourage the utilization of BC to create both environmentally friendly and durable stabilized subgrade material.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

水泥稳定软粘土的力学和微观结构特性：通过砂替代和生物炭添加剂改善路基应用

生物炭（BC）是一种通过煤热解产生的环保材料，可以改善水泥基建筑和建材的机械性能。本研究探讨了生物炭和天然砂（沙）替代物对改善作为绿色路基材料的掺合水硬性水泥（BHC）稳定软粘土（SC）的静态和循环响应的影响。研究考察了 BHC 稳定 SC-BC-Sand 样品的无侧限抗压强度（UCS）、间接拉伸应力（ITS）和间接拉伸疲劳寿命（ITFL）。研究发现，由于多孔结构和高吸水性，在 BHC 稳定样品中添加 10% BC 可增强胶凝产品的性能。与 BHC 稳定的 SC 相比，该最佳成分的 UCS、ITS 和 ITFL 分别提高了 315%、347% 和 862%。傅立叶变换红外光谱仪、热重分析仪差热分析和扫描电子显微镜与能量色散射线光谱分析表明，最佳配料的 BHC 稳定样品孔隙中的 C-S-H 和 Ca(OH)2 含量最高。这项调查将鼓励利用 BC 来制造既环保又耐用的稳定基层材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.