Scheffe’s approach for single additive optimization in selected soils amelioration studies for cleaner environment and sustainable subgrade materials

Attah, Imoh Christopher; Etim, Roland Kufre; Alaneme, George Uwadiegwu; Ekpo, David Ufot; Usanga, Idorenyin Ndarake

doi:10.1016/j.clema.2022.100126

Cited by 20 publications

(15 citation statements)

References 39 publications

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“…The undulating peaks observed in the spectra signify that prism and basal were gotten as varying degrees of 2-theta. The obtained result indicates presence of lead, sulfate, silicon and Aluminum bonded crystals [19,68].…”

Section: X-ray Diffraction Test Resultsmentioning

confidence: 80%

Experimental investigation of crude oil contaminated soil for sustainable concrete production

Ezeokpube

Alaneme

Attah

et al. 2022

Archit. Struct. Constr.

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Contaminated soil materials are often unsuitable for engineering construction works due to high content of impurities which inhibits development of mechanical strength and durability properties. This study was therefore necessary to make available empirical evidence revealing the consequences of crude petroleum pollution on the mechanical characteristics of materials made of concrete and determine its effect on civil engineering works. The study involved collection of contaminated soil sample from the Kolomani oil-well in Bauchi State, Nigeria and laboratory evaluation performed to evaluate the engineering possessions of concrete formed from contaminated soil sample. A calculated ingredient at a proportion of water to cement (W/C) set at 0.5, a mix proportion of 1:1.8:2.7 was used with the fine aggregate content replaced partially with crude oil contaminated soil materials (COCM) from 0-40%. The obtained laboratory results showed rise in compressive strength property as COCM fraction increases with the optimal response of 16.36 N/mm 2 derived at 20% replacement. The experimental results was further subjected to statistical analysis using one-way ANOVA and F-statistics to test the source of variation for the geotechnical properties. Multiple Linear Regression (MLR) and correlation statistics were then used to establish relationship between mix ratios and the geotechnical properties. The results signifies good performance with R-squared of 82.81. The benefits derived from this work would enhance production of sustainable concrete works which can be applicable in large scale for tile production.

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Section: X-ray Diffraction Test Resultsmentioning

confidence: 80%

Experimental investigation of crude oil contaminated soil for sustainable concrete production

Ezeokpube

Alaneme

Attah

et al. 2022

Archit. Struct. Constr.

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“…Taking a critical examination of the experimental points for the binary blends with a maximum and minimum rheological and mechanical strength performance (Y 1 , Y 3 and Y 4 ) served to designate mix 1, mix 3 and mix 4, respectively. These nano-tests were performed in order to elucidate and ratify the pozzolanic action from the morphological examination of the concrete specimens as a result of the optimization exercise shown in Figure 12 , Figure 13 and Figure 14 [ 18 , 48 ].…”

Section: Results Discussion and Analysismentioning

confidence: 99%

“…This is a vital procedure in material science that describes the broad and general method of probing and measuring a material’s structure and properties [ 18 ].…”

Section: Materials and Methodologymentioning

confidence: 99%

“…Consecutively, the number of exhaustive trials to be reduced before the optimum combination was established, and the use of analytical and statistical techniques would enhance the rationalizing of the initial trial mixes into a logical and analytical process [ 16 , 17 ]. This statistical method is very helpful in tracing of the optimum mixture combination based on the details of explicit weight functions of the combination cogs and basic formula resulting from prior experimental experiences without engaging in laborious, time-consuming and expensive work [ 18 ]. Scheffe’s simplex lattice approach is used to formulate and design the mix ratio of the ingredients in an attempt to optimize the concrete’s mechanical properties [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

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Scheffe’s Simplex Optimization of Flexural Strength of Quarry Dust and Sawdust Ash Pervious Concrete for Sustainable Pavement Construction

et al. 2023

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Pervious concrete provides a tailored surface course with high permeability properties which permit the easy flow of water through a larger interconnected porous structure to prevent flooding hazards. This paper reports the modeling of the flexural properties of quarry dust (QD) and sawdust ash (SDA) blended green pervious concrete for sustainable road pavement construction using Scheffe’s (5,2) optimization approach. The simplex mixture design method was adapted to formulate the mixture proportion to eliminate the set-backs encountered in empirical or trials and the error design approach, which consume more time and resources to design with experimental runs required to evaluate the response function. For the laboratory evaluation exercise, a maximum flexural strength of 3.703 N/mm2 was obtained with a mix proportion of 0.435:0.95:0.1:1.55:0.05 for water, cement, QD, coarse aggregate and SDA, respectively. Moreover, the minimal flexural strength response of 2.504 N/mm2 was obtained with a mix ratio of 0.6:0.75:0.3:4.1:0.25 for water, cement, QD, coarse aggregate and SDA, respectively. The test of the appropriateness of the developed model was statistically verified using the Student’ t-test and an analysis of variance (ANOVA), and was confirmed to be acceptable based on computational outcomes at the 95% confidence interval. Furthermore, the scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) were used to evaluate the morphological and mineralogical behavior of green prior concrete samples with various additive mixture compositions. The addition of QD and SDA, on the other hand, aided the creation of porous microstructures in the concrete matrix due to fabric changes in the concrete mixture, potentially aided by the formation of cementitious compounds such as calcium aluminate hydrate and calcium silicate hydrate.

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“…In general, all models have an information input, an information processor, and an output of expected results. Models do not just reflect reasoning, they also stimulate new ideas 11 , 12 . According to Ndirika and Onwualu 13 , model is a representation of the construction and working of some system of interest; model is similar to but simpler than the system it represents; one purpose of a model is to enable the analyst or the researcher to predict the effect of changes to the system.…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling and numerical simulation technique for selected heavy metal transport in MSW dumpsite

Usoh

Ahaneku

Ugwu

et al. 2023

Sci Rep

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The study focused on development of mathematical modeling and numerical simulation technique for selected heavy metal transport in Uyo municipal solid waste dumpsite in Akwa Ibom State to investigate the level in depth to which leachate from the dumpsite extends and the quantity of leachate at various depth of the dumpsite soil. Uyo waste dumpsite is operating open dumping system where provisions are not made for preservation and conservation of soil and water quality, hence, the need for this study. Three monitoring pits within Uyo waste dumpsite were constructed and infiltration runs were measured, and soil samples were collected beside infiltration points from nine designated depths ranging from 0 to 0.9 m for modeling heavy metal transport in the soil. Data collected were subjected to descriptive and inferential statistics while the COMSOL Multiphysics software 6.0 was used to simulate the movement of pollutants in the soil. It was observed that heavy metal contaminant transport in soil of the study area is in the power functional form. The transport of heavy metals in the dumpsite can be described by a power model from linear regression and a numerical model based on finite element. Their validation equations showed that the predicted and the observed concentrations yielded a very high R2 value of over 95%. The power model and the COMSOL finite element model show very strong correlation for all selected heavy metals. Findings from the study has identified level in depth to which leachate from the dumpsite extends and the quantity of leachate at various depth of the dumpsite soil which can be accurately predicted using leachate transport model of this study.

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Scheffe’s approach for single additive optimization in selected soils amelioration studies for cleaner environment and sustainable subgrade materials

Cited by 20 publications

References 39 publications

Experimental investigation of crude oil contaminated soil for sustainable concrete production

Experimental investigation of crude oil contaminated soil for sustainable concrete production

Scheffe’s Simplex Optimization of Flexural Strength of Quarry Dust and Sawdust Ash Pervious Concrete for Sustainable Pavement Construction

Mathematical modeling and numerical simulation technique for selected heavy metal transport in MSW dumpsite

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