Journal ArticleDOI
Response Surface Methodology for Optimization of Stabilizer Dosage Rates of Marginal Sand Stabilized with Sludge Ash and Fiber Based on UCS Performances
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In this paper, the optimal amounts of stabilizers (SSA, PF, and Curing Time) for stabilization of a marginal sand (poorly-graded sand) were investigated using Response Surface Methodology (RSM).Abstract:
Optimization of the stabilization materials in terms of their dosage rates specifically used for stabilization applications have become a great interest by the experimenters due to the concerns of strength performance, time and economy for the construction projects. Using a relatively recent optimization technique, Response Surface Methodology (RSM), this paper is mainly focused on investigation of the optimum amounts of stabilizers (Sewage Sludge Ash (SSA) and Polypropylene Fiber (PF)) and Curing Time (CT) that yield to maximum unconfined compressive strength (UCS) for stabilization of a marginal sand (poorly-graded sand). For this purpose, an experimental study has been carried out conducting UCS tests, where the stabilizer proportions are 0-30% for SSA and 0-1% for PF, by total dry weight of sand+SSA. Also, the curing times considered prior to testing are 0, 7 and 14 days. All UCS tests have been performed following the experimental program by central composite design that used the ranges of stabilizer proportions and curing times. On the basis of experimental data, a full quadratic model with natural log transformation and backward analysis has been built through RSM considering the factors of SSA, PF, CT, and the response of UCS. The results indicate that the mathematical model built in this study is statistically significant (p ≤ 0.05) through the analysis of variance (ANOVA), thus it is applicable for optimization process. The findings from the optimization effort demonstrate that the most potential values for SSA, PF and CT are 19.95%, 0.57% and 12.15-day, respectively. The proposed values could be beneficial for the experimenters in practice specifically for preliminary evaluations prior testings of stabilizations.read more
Citations
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References
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Book
Response Surface Methodology: Process and Product Optimization Using Designed Experiments
TL;DR: Using a practical approach, this book discusses two-level factorial and fractional factorial designs, several aspects of empirical modeling with regression techniques, focusing on response surface methodology, mixture experiments and robust design techniques.
Book ChapterDOI
On the Experimental Attainment of Optimum Conditions
George E. P. Box,K. B. Wilson +1 more
TL;DR: The work described in this article is the result of a study extending over the past few years by a chemist and a statistician, which has come about mainly in answer to problems of determining optimum conditions in chemical investigations, but they believe that the methods will be of value in other fields where experimentation is sequential and the error fairly small.
Book
Principles of Geotechnical Engineering
TL;DR: Das' "Principles of geotechnical engineering" as discussed by the authors provides a good overview of soil properties and mechanics, combined with a study of field practices and basic soil engineering procedures.
Book
Fundamental concepts in the design of experiments
TL;DR: The book as discussed by the authors is written by anyone engaged in experimental work who has a good background in statistical inference and will be most profitable reading to those with a background on statistical methods including analysis of variance.
Journal ArticleDOI
Strength and mechanical behavior of short polypropylene fiber reinforced and cement stabilized clayey soil
TL;DR: In this article, the effects of discrete short polypropylene fiber (PP-fiber) on the strength and mechanical behavior of uncemented and cemented clayey soil were investigated.