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Water transport properties and Life Cycle Assessment of low-grade fly ash based cementitious materials

 Water transport properties and Life Cycle Assessment of low-grade fly ash based cementitious materials
Author(s): ,
Presented at IABSE Congress: Engineering for Sustainable Development, New Delhi, India, 20-22 September 2023, published in , pp. 303-312
DOI: 10.2749/newdelhi.2023.0303
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In this study, fly ash is used as a replacement for cement in mortar to find its impact on durability indicators and the environment regarding greenhouse gas (GHG} emissions. This study focuses on ...
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Bibliographic Details

Author(s): (Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, India)
(Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, India)
Medium: conference paper
Language(s): English
Conference: IABSE Congress: Engineering for Sustainable Development, New Delhi, India, 20-22 September 2023
Published in:
Page(s): 303-312 Total no. of pages: 10
Page(s): 303-312
Total no. of pages: 10
DOI: 10.2749/newdelhi.2023.0303
Abstract:

In this study, fly ash is used as a replacement for cement in mortar to find its impact on durability indicators and the environment regarding greenhouse gas (GHG} emissions. This study focuses on GHG emissions from the construction materials, strength, and capillary transport of water which is a function of the w/cm ratio, pore size distribution, and curing period. The capillary sorption process showed a very complex time-dependent relationship. The sorptivity and absorption of mortar were found at different w/cm ratios and fly ash replacement. Fly ash replacement showed a negative impact on compressive strength as well as on water absorption due to its similar particle size compared to cement. The secondary absorption rate was lower than ~59 % to 88% compared to the initial absorption rate for all the mixtures. 35 % replacement of cement with fly ash resulted in a

~27% reduction of GHG emissions compared to control mortar mixtures.

Keywords:
compressive strength pore size distribution greenhouse gas emissions Sorptivity Capillary sorption