eprintid: 10709 rev_number: 2 eprint_status: archive userid: 1 dir: disk0/00/01/07/09 datestamp: 2023-11-09 16:37:19 lastmod: 2023-11-09 16:37:19 status_changed: 2023-11-09 16:32:01 type: article metadata_visibility: show creators_name: Saad, S.A. creators_name: Shafiq, N. creators_name: Ali, M. creators_name: Osman, M.M. title: Analysis by means of surface response to chemical composition and pozzolanic reactivity of ultrafine treated rice husk ash (UFTRHA) as cementing additive material ispublished: pub note: cited By 0 abstract: Pozzolanic reactive material is considered as one of the most essential characteristic of cementing additive material in concrete technology application. Normally, the reactive material contains abundant silica that enhances concrete strength activity. Undeniably, it is proven that rice husk ash (RHA) possesses large quantity of silica that induces the pozzolanic reaction in concrete. Nevertheless, usage of conventional RHA is still widely accepted in concrete industry nowadays. One of the setback of conventional RHA incorporation is simply because of its properties inconsistency. Therefore, enhancement on the RHA properties by introduction of a specific pretreatment prior to incineration process is expected to provide an alternative way in order to produce highly reactive cementing additive material from locally available agricultural by-product, the rice husk. In this paper, a total number of 30 experimental set points was conducted. Statistical analysis was conducted for four independent variables and two responses using Response Surface Method (RSM). The analysis was completed using a commercial software set (Design-Expert) for experimental design and analysis. The independent variables were HCl concentration, soaking time, burning temperature and soaking temperature. Meanwhile, the responses investigated in this study were including cumulative pozzolan percentage and electric conductivity decrement from 0 to 2 minutes. As for the statistical analysis of the data for response 1, the cumulative pozzolan percentage calculated from the model was in-line with the experimental data, with R-squared value of 0.9565. Hence, the result validates the precision of the model. On the other hand, the R-squared value for response 2 which is the EC decrement from 0 - 2 Minutes, it shows that the model was in agreement to the experimental values at 0.9342. Thus, it is again justifies the model accuracy. © 2018 Authors. date: 2018 publisher: Science Publishing Corporation Inc official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85059234930&doi=10.14419%2fijet.v7i4.35.22759&partnerID=40&md5=9afc3c978569745aa092ab9e8c994e9d id_number: 10.14419/ijet.v7i4.35.22759 full_text_status: none publication: International Journal of Engineering and Technology(UAE) volume: 7 number: 4 pagerange: 342-346 refereed: TRUE issn: 2227524X citation: Saad, S.A. and Shafiq, N. and Ali, M. and Osman, M.M. (2018) Analysis by means of surface response to chemical composition and pozzolanic reactivity of ultrafine treated rice husk ash (UFTRHA) as cementing additive material. International Journal of Engineering and Technology(UAE), 7 (4). pp. 342-346. ISSN 2227524X