![Sample our Environment & Agriculture journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5934/TOC-Subject-Sample-2021-Environment-Agriculture.jpg"})
ABSTRACT
A 3-factor, 2-level full factorial design was employed in the current study to design the experiment, evaluate the results, and optimize the contents of olivine and coir fiber for improving the strength property of a soft marine clay. The influence of the independent variables (olivine content, coir fiber content, and curing time) on the response [unconfined compressive strength (UCS)] were investigated by analysis of variance (ANOVA). The ANOVA results show that olivine content and curing time significantly affected the UCS. A regression model was developed to relate the response to the variables. The developed model shows a good agreement between the predicted and actual values, demonstrating the validity of the regression analysis in the process optimization. The optimum conditions were found to be 30% olivine content, 2.5% coir fiber content, and 35 days of curing, which improved the UCS by approximately two-fold. The results demonstrate that both chemical modification and mechanical reinforcement by adding olivine and coir fiber are efficient techniques to improve the strength property of soft marine clays. The findings of the study also open up a promising perspective for using full factorial design in defining the optimal factor combinations for improving the strength properties of weak soils.
摘要
本研究采用3因素，2水平的全因子设计进行试验设计，对试验结果进行评价，从而改善橄榄石和椰棕纤维的含量进行优化，以提高软质海相粘土的强度性能. 采用方差分析（ANOVA）研究了(橄榄石含量，椰棕纤维含量，养护)时间等自变量对无侧限抗压强度（UCS）响应的影响. ANOVA结果表明，橄榄石含量和养护时间对UCS有显着影响. 建立了响应与变量之间的回归模型. 所建立的模型预测值与实际值吻合更好，说明了回归分析在过程优化中的有效性. 最佳条件为橄榄石含量为30％，椰棕纤维含量为2.5％，养护时间为35天，可使UCS提高约2倍. 结果表明，添加了橄榄石和椰棕纤维的化学改性和机械强化是改善软质海相粘土强度性能的有效方法. 本研究的结果也为采用全因子设计确定改善软弱土强度特性的最优因子组合开辟了一个有希望的前景.
Declaration of Interest
No potential conflict of interest was reported by the authors.