Scholarlink

<p>Agricultural activities tend to produce a lot of waste in their operation. These wastes, if not properly disposed of, cause environmental pollution. Ordinary Portland Cement (OPC) is the primary binder in standard cementitious mixes and a significant contributor to CO<sub>2</sub> emissions. This study investigates the utilization of RHA and biochar as supplementary cementitious materials to minimize the need for OPC. Rice husk, an agricultural waste, was converted into RHA and biochar using a locally built pyrolysis system and optimized to achieve better-quality RHA and biochar, enhancing their pozzolanic properties. In order to establish RHA and Biochar's suitability as SCM, chemical composition techniques (X-ray diffraction analysis, X-ray fluorescence analysis, and ultrasonic pulse velocity testing) and mechanical performance testing (compressive strength tests of various mortar mixes with varied percentages (0%, 5%, 10%, and 15%) replacement of RHA and Biochar by weight of cement) were conducted. Compressive strength on mortar cubes with RHA and biochar ranged between 1.9 and 12.1 N/mm<sup>2</sup>. A 10% replacement of RHA had the highest strength (12.1 N/mm<sup>2</sup>), while 15% CHAR had the lowest (1.9 N/mm<sup>2</sup>). The rest of the mixes, except the control and 15%, showed improved strength over the control. Utilization of rice husk ash in cementitious materials encourages efficient circular economy principles as well as environmentally sustainable infrastructure. This study underscores how utilizing bio-renewable resources in construction can contribute to sustainable development and the transition of agro-waste cementitious mixes from small-scale trials to industrialized production adopting systems like the locally built pyrolysis set-up.</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

Utilization of rice husk waste as biochar and pozzolanic ashes in cementitious blends

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年2月17日

查看全文
  • Michael Commeh,
  • Mareike Thiedeitz,
  • Benedict Acheampong,
  • Nkansah Nana Kwame Ashley,
  • Godsway Gafah,
  • Joshua Mawuli Tsitsi,
  • Seth Acheampong,
  • Edmond Tsekpo,
  • Rosemond Nyamewaa Van Ess,
  • Jason Okyeremah Barnor-Arthur

摘要

Agricultural activities tend to produce a lot of waste in their operation. These wastes, if not properly disposed of, cause environmental pollution. Ordinary Portland Cement (OPC) is the primary binder in standard cementitious mixes and a significant contributor to CO2 emissions. This study investigates the utilization of RHA and biochar as supplementary cementitious materials to minimize the need for OPC. Rice husk, an agricultural waste, was converted into RHA and biochar using a locally built pyrolysis system and optimized to achieve better-quality RHA and biochar, enhancing their pozzolanic properties. In order to establish RHA and Biochar's suitability as SCM, chemical composition techniques (X-ray diffraction analysis, X-ray fluorescence analysis, and ultrasonic pulse velocity testing) and mechanical performance testing (compressive strength tests of various mortar mixes with varied percentages (0%, 5%, 10%, and 15%) replacement of RHA and Biochar by weight of cement) were conducted. Compressive strength on mortar cubes with RHA and biochar ranged between 1.9 and 12.1 N/mm2. A 10% replacement of RHA had the highest strength (12.1 N/mm2), while 15% CHAR had the lowest (1.9 N/mm2). The rest of the mixes, except the control and 15%, showed improved strength over the control. Utilization of rice husk ash in cementitious materials encourages efficient circular economy principles as well as environmentally sustainable infrastructure. This study underscores how utilizing bio-renewable resources in construction can contribute to sustainable development and the transition of agro-waste cementitious mixes from small-scale trials to industrialized production adopting systems like the locally built pyrolysis set-up.