en گروه سرامیک Ceramic Materials and Engineering Research Paper Research Paper <span style="font-size:12.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">Geopolymer/nano carbon black composite is a promising electrically conductive smart material that can be used in self-heating and self-sensing applications. This paper studies the effect of adding nano carbon black to the physical, mechanical, electrical, and electrothermal performance of metakaolin-based geopolymer. Carbon black was added at the percent of 5%, 10%, 15%, and 20% by weight of metakaolin; the compressive strength was tested at various ages of 7, 14, 28, and 90 days, and the electrothermal performance was tested using AC and DC voltages. The results showed that a compromise between suitable compressive strength and high electrothermal conversion could be achieved when a specific balance between the carbon black percent and the lowest water content is established. </span></span></span><span style="font-size:12.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">A composite with a compressive strength of 27 MPa and stable electrothermal </span></span></span><span style="font-size:12.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">performance reaching 142&deg;C at 9V DC can be prepared using 20 wt% of carbon black and a water-to-metakaolin ratio of 0.549, which is used as a smart material in construction applications.</span></span></span> Geopolymer,Nano carbon black,Electrothermal,Self-heating 0 0 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-1533-1&slc_lang=en&sid=1 Sibbt Jabbar mat922.sibbt.mohammed@student.uobabylon.edu.iq 1800319475328460022154 1800319475328460022154 No Department of Ceramics and Building Materials, College of Materials Engineering, University of Babylon, Babil, Iraq. Dalya Hameed mat.dalya.hekmat@uobabylon.edu.iq 1800319475328460022155 1800319475328460022155 No Department of Ceramics and Building Materials, College of Materials Engineering, University of Babylon, Babil, Iraq. Imad Disher imadali4@uobabylon.edu.iq 1800319475328460022156 1800319475328460022156 Yes Department of Ceramics and Building Materials, College of Materials Engineering, University of Babylon, Babil, Iraq.