Effect of Acidic Environment on Hollow Sandcrete Blocks

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2017 by IJETT Journal
Volume-47 Number-7
Year of Publication : 2017
Authors : Samson Duna., Fwangmun B.Wamyil
DOI :  10.14445/22315381/IJETT-V47P266

Citation 

Samson Duna., Fwangmun B.Wamyil "Effect of Acidic Environment on Hollow Sandcrete Blocks", International Journal of Engineering Trends and Technology (IJETT), V47(7),399-405 May 2017. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract
This research investigated the effects of Tetraoxosulphate VI acid on commercially produced hollow sandcrete blocks. Seventy two (72) hollow sandcrete blocks were produced for this research. Acid concentrations of pH 1.3, 1.4, 1.5, 1.7, 2.0 and 7.0 (control sample) were prepared and the sandcrete blocks immersed in the various acid concentrations for 24, 72, 168 and 672 hours. The density, water adsorption and compressive strength of the blocks were measured. The research concluded that there was a slight effect of acid concentration on compressive strength of the blocks with the control sample immersed at (pH 7) having the overall highest value of 5.52N/mm2 at the end of 672hour sampling while the others (pH 1.3, 1.4, 1.5, 1.7, 2.0) have highest compressive strength values at the 72hour sampling (corresponding to 5.65, 5.52, 5.41, 5.21 & 5.25 N/mm2 respectively). There was also a reduction in water absorption in the acidic medium while there was no effect of acidity on the density of blocks.

 References

[1] Abdullahi, M., "Compressive Strength of Sandcrete Blocks in Bosso and Shiroro Areas of Minna , Nigeria," AU Journal of Technology, vol. 9(2), pp.126–132. Oct. 2005.
[2] Anosike, M.N. & Oyebade, A.A., "Sandcrete Blocks and Quality Management in Nigeria Building Industry," Journal of Engineering, Project and Production Management, vol. 2(1), pp.37–46. Dec. 2011.
[3] Coduto, D.P., Foundation Design: Principles and Practice Second., New Jersey: Prentice Hall, 2001.
[4] Cement:-Pt. 1: Composition, specifications and conformity criteria for common cements. Standard Organization of Nigeria NIS 444-1, 2003.
[5] Ezeokonkwo, J.C. & Nwoji, C.U., "The Load Carrying Capacity of Hollow Sandcrete Blocks," Journal of Emerging Trends in Engineering and Applied Sciences (JETEAS), vol. 3(1), pp.75–80. 2012.
[6] E-Cement - Part 1: Composition, specifications and conformity criteria for common cements , European Committee for Standardization, 2000. EN 197-1:2000 (pp.1–29).
[7] Menendez, E., Matschei, T. & Glasser, F.P., 2013. Sulfate Attack of Concrete. In M. Alexander, A. Berton, & N. De Belie, eds. Performance of Cement-Based Materials in Aggressive Aqueous Environments. RILEM, pp. 7–74.
[8] Neville, A.M., Properties of concrete 3rd ed., Pitman Publishers Ltd., London. 1981.
[9] Olufisayo, A.A., "Strength Properties of Commercially produces Sandcrete Blocks in Ado Ekiti, Akure and Ile Ife Nigeria," International Journal of Engineering Science Invention, vol. 2(8), pp.25–34, Aug. 2013.
[10] Precast Concrete Block. British Standard Institutions.London BS 2068, 1968.
[11] Specification for aggregates from natural resources for concrete. British Standard Institution, London BS 882, 1973.
[12] Specification for Ordinary Portland Cement. British Standard Institution, London BS 12, 1996.
[13] Standard For Sandcrete Blocks. Standard Organization of Nigeria, Lagos NIS 87, 2000.
[14] Standard for Sandcrete Blocks. Standard Organization of Nigeria, The Nigerian Industrial Standard, 1974.
[15] Yusuf, S.. & Hamza, A.A., "Comparing The Compressive Strength Of Six And Nine Inches Hand Moulded Sandcrete Block," Journal of Engineering and Applied Sciences, vol. 3, pp. 64–69, March 2011.

Keywords
sandcrete blocks, compressive strength, low pH, acid, Tetraoxosulphate VI acid.