Optimization of Cement-Based Mortar Containing Oily Sludge Ash by Response Surface Methodology

Materials

Nasiru Danlami¹  Mahmud Abubakar²  Mubarak Usman Kankia³  Ahmad Hussaini Jagaba³  Bashar S. Mohammed³  Wan Nurliyana Samahani³  Khalid Sayed³  Sani Haruna³  Effa Affiana Ishak³  Lavania Baloo³  Noor Amila Bt Wan Zawawi³ 

[1] Civil Engineering Department, Bayero University, Kano PMB 3011, Nigeria;Civil Engineering Department, Federal University of Technology, Minna PMB 65, Nigeria;Civil and Environmental Engineering Department, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Malaysia;

关键词: oily sludge;    cement;    compressive strength;    petroleum hydrocarbon;   

DOI  :  10.3390/ma14216308

来源: DOAJ

【 摘 要 】

In the industries of petroleum extraction, a large volume of oily sludge is being generated. This waste is usually considered difficult to dispose of, causing environmental and economic issues. This study presented the novel experimental method of manufacturing mortar used in civil construction by cement and oily sludge ash (OSA). The defined method was described with a logical experimental study conducted to examine a feasible manufacturing method for casting cement-based mortars by partially replacing cement with OSA. Replacement concentrations for OSA ranged from 0 to 20 percent by cement weight, while the water-to-cement (w/c) ratio was varied from 0.4 to 0.8, and the amount of sand was kept constant. The strengths and absorption rate of the mortar were monitored for 28 days. The OSA contains a crystalline structure with packs of angular grains. Because of OSA in the cement-based mortar mixtures and water-to-cement ratios, the mechanical strength was improved significantly. However, the water absorption trend increased linearly. Using variance analysis, the influence of OSA and w/c ratio on the behavior of mortar was acquired. The developed models were significant for all p-value reactions of <5%. Numerical optimization results showed that the best mixture can be obtained by replacing 8.19 percent cement with OSA and 0.52 as a ratio of w/c.

【 授权许可】

Unknown