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Hosseinzadeh, Lobat, Jamshidi, Morteza, Dehestani, Mehdi, Nabizadeh, Seyed Farhad. (1406). Compressive Strength and Sustainability Assessment of Mortar Incorporating Rice Husk Biochar as a Sustainable Cement Replacement. پژوهشنامه مدیریت اجرایی, (), -. doi: 10.22080/ceas.2026.32347.1122
Lobat Hosseinzadeh; Morteza Jamshidi; Mehdi Dehestani; Seyed Farhad Nabizadeh. "Compressive Strength and Sustainability Assessment of Mortar Incorporating Rice Husk Biochar as a Sustainable Cement Replacement". پژوهشنامه مدیریت اجرایی, , , 1406, -. doi: 10.22080/ceas.2026.32347.1122
Hosseinzadeh, Lobat, Jamshidi, Morteza, Dehestani, Mehdi, Nabizadeh, Seyed Farhad. (1406). 'Compressive Strength and Sustainability Assessment of Mortar Incorporating Rice Husk Biochar as a Sustainable Cement Replacement', پژوهشنامه مدیریت اجرایی, (), pp. -. doi: 10.22080/ceas.2026.32347.1122
Hosseinzadeh, Lobat, Jamshidi, Morteza, Dehestani, Mehdi, Nabizadeh, Seyed Farhad. Compressive Strength and Sustainability Assessment of Mortar Incorporating Rice Husk Biochar as a Sustainable Cement Replacement. پژوهشنامه مدیریت اجرایی, 1406; (): -. doi: 10.22080/ceas.2026.32347.1122

Compressive Strength and Sustainability Assessment of Mortar Incorporating Rice Husk Biochar as a Sustainable Cement Replacement

Civil Engineering and Applied Solutions
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 10 تیر 1406
نوع مقاله: Original Article
شناسه دیجیتال (DOI): 10.22080/ceas.2026.32347.1122
نویسندگان
Lobat Hosseinzadeh1؛ Morteza Jamshidi* 1؛ Mehdi Dehestani2؛ Seyed Farhad Nabizadeh1
1Department of Civil Engineering, Cha. C, Islamic Azad University, Chalus, Iran
2Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
تاریخ دریافت: 16 تیر 1405،  تاریخ بازنگری: 18 مرداد 1405،  تاریخ پذیرش: 30 شهریور 1405 
چکیده
The cement industry is a major contributor to global CO2 emissions, highlighting the need for sustainable supplementary cementitious materials (SCMs) capable of reducing cement consumption while maintaining mechanical performance. This study investigated the effects of raw rice husk (SH), rice husk biochar (BSH), and calcined rice husk ash (CSH) as partial replacements for ordinary Portland cement. Mortar mixtures incorporating 3%, 5%, and 8% of each material were evaluated in terms of workability, compressive strength, normalized compressive strength, and strength development up to 28 days. In addition, a cradle-to-gate life cycle assessment (LCA) was performed to quantify greenhouse gas (GHG) emissions, cumulative energy demand (CED), and environmental impacts using the ReCiPe endpoint method. The results showed that the processing method of rice husk significantly influenced both mechanical and environmental performance. Among the investigated materials, CSH improved workability because of its filler effect and fine particle size. The mixture containing 3% CSH and BSH achieved the highest 28-day compressive strength (43.4 and 41.1 MPa, respectively), corresponding to 143.6% and 136.0% of the reference mixture's compressive strength (i.e., a 43.6% and 36.0% increase), respectively. Biochar enhanced long-term strength through internal curing, whereas SH exhibited slower early-age strength development but substantial later-age strength gain. The LCA results indicated that replacing 8% of cement with RH reduced CO₂ emissions, cumulative energy demand, and the overall ReCiPe endpoint impact by 7.7%, 6.7%, and 4.8%, respectively, compared with the control mixture, while CSH also provided considerable environmental benefits. Overall, SH-derived materials offer an effective strategy for producing low-carbon cementitious mortars. The 3% CSH mixture delivered the best mechanical performance, whereas the 8% SH mixture achieved the greatest environmental benefits, demonstrating the importance of balancing engineering performance and sustainability.
کلیدواژه‌ها
Rice husk؛ Supplementary cementitious materials؛ Cement mortar؛ Compressive strength؛ Strength development؛ Life cycle assessment (LCA)؛ Sustainability
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