A Predictive Mathematical Model for Water Absorption of Sawdust Ash - Sand Concrete

  • Kenneth Miebaka Oba
  • Ichebadu George Amadi
Keywords: Saw Dust Ash, Scheffe’s Simplex Lattice, Sustainability, Water Absorption of Concrete


Saw Dust Ash (SDA) is an industrial waste that has been used by many researchers in concrete to achieve economic and environmental sustainability. In this study, 5% of sand was replaced with SDA to produce concrete with different mix ratios. Scheffe’s simplex theory was used for five mix ratios in a {5,2} experimental design which resulted in additional ten mix ratios. Additional fifteen mix ratios were generated from the initial fifteen, for verification and testing. Concrete cubes of 150mmX150mmX150mm were formed using the thirty concrete mix ratios generated, and soaked in water for 24hours. The water absorptions of cubes from each mix ratio were determined with the standard procedure. The results of the first fifteen water absorption values were used for the calibration of the model constant coefficients, while those from the second fifteen were used for the model verification using Scheffe’s simplex lattice design. A mathematical regression model was formulated from the results, with which the water absorptions were predicted. The model was then subjected to a two-tailed t-test with 5% significance, which ascertained the model to be adequate and fit with an R2 value of 0.8244. The study also revealed that SDA can replace 5% of sand and promote environmental sustainability without significantly changing the water absorption.


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M. S. Mamlouk & J. P. Zaniewski. (2011). Materials for Civil and Construction Engineers. (3rd ed.). New Jersey: Pearson Prentice Hall.

BS.1818. (1983), Part 122: Testing concrete. London: British Standard Institute.

F. F. Udoeyo, R. Brooks, C. Utam, P. Udo-inyang, & E. C. Ukpong. (2010). Effect of non-standard curing methods on the compressive strength of laterized concrete. ARPN Journal of Engineering and Applied Sciences, 5(2), 6–20.

H. K. Kim, J. H. Jeon, & H. K. Lee. (2012). Flow, water absorption, and mechanical characteristics of normal- and high-strength mortar incorporating fine bottom ash aggregates. Construction and Building Materials, 26(1), 249–256.

N. M. Noor et al. (2017). Compressive strength, flexural strength and water absorption of concrete containing palm oil kernel shell. In: IOP Conf. Series: Materials Science and Engineering 271.

J. Castro, D. Bentz, & J. Weiss. (2011). Cement & concrete composites effect of sample conditioning on the water absorption of concrete. Cement and Concrete Composites, 33(8), 805–813.

S. H. Alsayed & M. A. Amjad. (1996). Strength, water absorption and porosity of concrete. Journal of King Saud Universing - Engineering Sciences, 8(1), 109–119.

S. P. Zhang & L. Zong. (2014). Evaluation of relationship between water absorption and durability of concrete materials. Advances in Material Sciences and Engineering. Available at: https://www.hindawi.com/journals/amse/2014/650373/.

C. Marthong. (2012). Sawdust Ash (SDA) as partial replacement of cement. International Journal of Engineering Research and Applications, 2(4), 1980–1985.

P. Peduzzi. (2014). Sand, rarer than one thinks. Article reproduced from United Nations Environment Programme (UNEP) Global Environmental Alert Service (GEAS). Environmental Development, 11, 208–218.

UNEP. (2019). Sand and sustainability: Finding new solutions for environmental governance of global sand resources. Available at: https://wedocs.unep.org/handle/20.500.11822/28163.

S. Chowdhury, M. Mishra, & O. Suganya. (2015). The incorporation of wood waste ash as a partial cement replacement material for making structural grade concrete : An overview. Ain Shams Engineering Journal, 6, 429–437.

M. Mageswari & B. Vidivelli. (2009). The use of sawdust ash as fine aggregate replacement in concrete. Journal of Environmental Research and Development, 3(3), 720–726.

S. T. Tyagher, J. T. Utsev, & T. Adagba. (2011). Suitability of saw dust ash-lime mixture for production of sandcrete hollow blocks. Nigerian Journal of Technology, 30(1), 1–6.

M. E. Onyia. (2017). Optimisation of the cost of lateritic soil stabilized with quarry dust. International Journal of Scientific Engineering and Research, 8(9), 1400–1413.

C. U. Anya. (2015). Models for predicting the structural characteristics of sand-quarry dust blocks. Ph.D Thesis, Department of Civil Engineering, University of Nigeria, Nsukka.

C. E. Okere, D. O. Onwuka, S. U. Onwuka, & J. I. Arimanwa. (2013). Simplex-based concrete mix design. IOSR Journal of Mechnical and Civil Engineering, 5(2), 46–55.

E. M. Mbadike & N. N. Osadebe. (2014). Five component concrete mix optimization of aluminum waste using Scheffe’s theory. International Journal of Computer Engineering and Research, 4(4), 23–31.

E. M. Mbadike & N. N. Osadebe. (2013). Application of Scheffe’s model in optimization of compressive strength of lateritic concrete. Journal of Civil Engineering and Construction Technology, 4(9), 265–274.

L. Brown, A. N. Donev, & A. T. Biessett. (2015). General blending models for data from mixture experiments. Technometrics, 57(4), 449–456.

O. M. Ibearugbulem, L. O. Ettu, J. C. Ezeh, & U. C. Anya. (2013). A new regression model for optimizing concrete mixes. International Journal of Scientific Engineering and Research Technology, 2(7), 1735–1742.

Y. M. Gamil & I. H. Bakar. (2015). The Development of mathematical prediction model to predict resilient modulus for natural soil stabilised by POFA-OPC additive for the use in unpaved road design. In: Soft Soil Engineering International Conference, pp. 1–11.

P. N. Onuamah. (2015). Development-and-optimization-of-mechanical-strength-model-of-cement-laterite-sand-hollow-sandcrete-blocks. International Journal of Science Engineering and Research, 6(5), 645–655.

P. N. Onuama. (2015). Prediction-of-the-compressive-strength-of-concrete-with-palm-kernel-aggregate-using-the-artificial-neutral-networks-approach. International Journal of Science Engineering and Research, 6(6), 962–969.

N. N. Osadebe, C. C. Mbajiorgu, & T. U. Nwakonobi. (2007). An optimization model development for laterized- concrete mix proportioning in building constructions. Nigerian Journal of Technology, 26(1), 37–46.

K. M. Oba, O. O. Ugwu, & F. O. Okafor. (2019). Development of a model to predict the flexural strength of concrete using SDA as partial replacement for fine aggregate. International Journal of Science Engineering and Research, 10(5), 1216–1224.

K. M. Oba, O. O. Ugwu, & F. O. Okafor. (2019). Development of Scheffe’s model to predict the compressive strength of concrete using SDA as partial replacement for fine aggregate. International Journal of Innovative Technology and Exploring Engineering, 8(8), 2512–2521.

K. M. Oba. (2019). A mathematical model to predict the tensile strength of asphalt concrete using quarry dust filler. International Journal of Science Engineering and Research, 10(2), 1491-1498.

H. Scheffe. (1958). Experiments with mixtures. J. R. Stat. Ser. B, 25(2), 235–263.

How to Cite
Kenneth Miebaka Oba, & Ichebadu George Amadi. (2020). A Predictive Mathematical Model for Water Absorption of Sawdust Ash - Sand Concrete. International Journal of Engineering and Management Research, 10(1), 33-41. https://doi.org/10.31033/ijemr.10.1.7