Compressive Strength Gain of Glass Powder–Portlandite: An Investigation Toward Maximizing the Use of Waste Glass as Cement Replacement in Concrete

Gaurav Chand, Mithila Achintha, Yong Wang*

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

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Abstract

The paper presents selected findings from a combined theoretical and experimental investigation focusing on chemical reactions and strength gain in glass powder (GP) and calcium hydroxide (CH) mixes as a means of achieving more than the current wisdom of ~20% cement replacement with waste glass powder in concrete. The expected chemical reactions between CH (in concrete, CH is available as a by-product of cement hydration) and silica (SiO2) present in GP were first theoretically established using mole concept theory. The theoretically obtained results were then used to determine an appropriate CH and GP mix ratio for the CH–GP test specimens. The strength gain in CH–GP specimens with time was determined using compression tests, and the formation of strength contributing compound calcium–silicate–hydrate (C–S–H) was determined using X-ray diffraction (XRD) experiments. The compression test results showed CH–GP specimens possessed noticeable compressive strength, and the XRD results confirmed the formation of C–S–H. The results of both compression test and XRD analysis show the major strength imparting compounds in CH–GP specimens formed at later stages (i.e., after 28 days) of curing.
Original languageEnglish
Title of host publicationThe 1st International Conference on Net-Zero Built Environment
Subtitle of host publicationNTZR 2024
EditorsMahdi Kioumarsi, Behrouz Shafei
Place of PublicationCham
PublisherSpringer Cham
Pages599-609
Number of pages11
ISBN (Electronic)9783031696268
ISBN (Print)9783031696251
DOIs
Publication statusPublished - 9 Jan 2025

Publication series

NameLecture Notes in Civil Engineering
PublisherSpringer Cham
Volume237
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Keywords

  • calcium–silicate–hydrate
  • cement
  • calcium hydroxide
  • glass

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