Abstract

Low-cost housing is urgently needed in low- and middle-income countries. Concrete is often too costly and raw material production, including aggregate extraction, is known to be harmful to the environment. In this paper the use of an agricultural waste, corncob, as a potential lightweight replacement of sand in cement materials has been studied. Corncob granules were added to the mix in percentages of 5%, 10%, 15% and 20% by volume. The corncob granules were used in their natural state as well as following coating with either cement slurry or gum Arabic. The effect of sand replacement was determined through flexural and compressive testing of materials, while the chemical composition was evaluated using Thermogravimetric Analysis (TGA) and X-Ray Diffraction (XRD). The porosity of the mixes was also determined using a mercury inclusion porosimeter (MIP). The results showed that while the early age strength (7 days) was extremely low, the late age’s strengths improved drastically between 10% up to 3500% in 28 days.
Original languageEnglish
Title of host publicationProceedings of the 75th RILEM Annual Week 2021. RW 2021.
EditorsJ. L. Escalante-Garcia, P. Castro Borges, A. Duran-Herrera
Place of PublicationCham, Switzerland
PublisherSpringer, Cham; Fondazione C.I.M.E., Florence
Pages973-982
Number of pages10
ISBN (Electronic)9783031217357
ISBN (Print)9783031217340
DOIs
Publication statusPublished - 11 Mar 2023
Event75th RILEM Annual Week & International Conference on Advances in Sustainable Construction Materials and Structures - Merida, Mexico
Duration: 30 Aug 20213 Sept 2021
http://rilemweek2021.uanl.mx/

Publication series

NameRILEM Bookseries
Volume40
ISSN (Print)2211-0844
ISSN (Electronic)2211-0852

Conference

Conference75th RILEM Annual Week & International Conference on Advances in Sustainable Construction Materials and Structures
Country/TerritoryMexico
Period30/08/213/09/21
Internet address

Keywords

  • Cement
  • Corncob
  • Low-cost housing
  • Maize
  • Strength

ASJC Scopus subject areas

  • Mechanics of Materials
  • Building and Construction
  • Civil and Structural Engineering

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