Utilization of Solid Waste from Brick Industry and Hydrated Lime in Self-Compacting Cement Pastes

Autor: Muhammad Usman Hanif, Mati Ullah Shah, Iqra Naseem, Sara Farooq, Muhammad Usman
Jazyk: angličtina
Rok vydání: 2021
Předmět:
self-compacting paste systems (SCPs)
Municipal solid waste
Materials science
waste burnt brick powder (WBBP)
0211 other engineering and technologies
02 engineering and technology
engineering.material
supplementary cementitious materials (SCMs)
lcsh:Technology
Article
021105 building & construction
General Materials Science
supplementary cementitious materials (SCMs)
waste burnt brick powder (WBBP)
lcsh:Microscopy
Shrinkage
Lime
lcsh:QC120-168.85
Cement
Brick
lcsh:QH201-278.5
lcsh:T
Metallurgy
Pozzolan
021001 nanoscience & nanotechnology
hydrated lime (HL)
cement paste
rheological properties
shrinkage
lcsh:TA1-2040
engineering
Pozzolanic reaction
durability
lcsh:Descriptive and experimental mechanics
Cementitious
lcsh:Electrical engineering. Electronics. Nuclear engineering
0210 nano-technology
lcsh:Engineering (General). Civil engineering (General)
lcsh:TK1-9971
Zdroj: Materials, Vol 14, Iss 1109, p 1109 (2021)
Materials
Volume 14
Issue 5
ISSN: 1996-1944
Popis: The huge amount of solid waste from the brick manufacturing industry can be used as a cement replacement. However, replacement exceeding 10% causes a reduction in strength due to the slowing of the pozzolanic reaction. Therefore, in this study, the pozzolanic potential of brick waste is enhanced using ultrafine brick powder with hydrated lime (HL). A total of six self-compacting paste mixes were studied. HL 2.5% by weight of binder was added in two formulations: 10% and 20% of waste burnt brick powder (WBBP), to activate the pozzolanic reaction. An increase in the water demand and setting time was observed by increasing the replacement percentage of WBBP. It was found that the mechanical properties of mixes containing 5% and 10% WBBP performed better than the control mix, while the mechanical properties of the mixes containing 20% WBBP were found to be almost equal to the control mix at 90 days. The addition of HL enhanced the early-age strength. Furthermore, WBBP formulations endorsed improvements in both durability and rheological properties, complemented by reduced early-age shrinkage. Overall, it was found that brick waste in ultrafine size has a very high degree of pozzolanic potential and can be effectively utilized as a supplementary cementitious material.
Databáze: OpenAIRE
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