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Residual Strength of Blended Cement Pastes and Mortar Exposed to Elevated Temperatures

Author(s):


Medium: journal article
Language(s): English
Published in: Electronic Journal of Structural Engineering, , v. 16
Page(s): 26-37
DOI: 10.56748/ejse.16208
Abstract:

This paper presents the outcome of a series of tests to determine properties of blended cement pastes and mortar mixtures using Taguchi’s design of experiment approach. Fly ash (FA), water to cementitious material ratio (w/c), superplasticiser (SP) and sand to cementitious material ratio (s/c) are the main parameters considered. Mixture samples were tested at varying temperatures up to 800oC. The ANOVA results and regression analysis show that an increase in FA content and w/c ratio lead to a decrease in the density of blended cement. For compressive strength development, an increase in FA content and s/c ratio decreased the compressive strength development. Within the tested levels of the parameters, the optimum mix to achieve the highest compressive strength of blended cement mixtures is 20% of FA content, 1.5 of s/c ratio, 0.35 of w/c ratio and 0.2% of SP. Increasing the content of FA and SP improved the overall residual strength, and the optimum mix design to achieve the highest residual strength is 20% of FA, 1.5 of s/c ratio, 0.35 of w/c ratio and 0.2 of SP. Based on all the test results, an empirical formula for predicting residual strength of blended cement paste and mortar is proposed.

Structurae cannot make the full text of this publication available at this time. The full text can be accessed through the publisher via the DOI: 10.56748/ejse.16208.
  • About this
    data sheet
  • Reference-ID
    10778769
  • Published on:
    12/05/2024
  • Last updated on:
    12/05/2024
 
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