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Title: Microstructure of 2 and 28-day cured Portland limestone cement pastes
Authors: Sezer, Gözde İnan
Çopuroğlu, Oğuzhan
Ramyar, Kambiz
Keywords: Limestone;clinker;hardened cement paste microstructure
Issue Date: Aug-2010
Publisher: CSIR
Abstract: In this study, microstructures of limestone cement pastes cured for 2 and 28 days are investigated. For this purpose, limestone and clinker are separately ground in a ball-mill until obtained a given constant 32 µm sieve residue. The gypsum is kept constant as 5% by weight of cement. Cement pastes with 0.5 water/binder ratios and 0, 6, 35% limestone/clinker ratios are prepared. After 2 and 28 days standard curing, ESEM investigations are carried out on these specimens. It is found that hydration products are accumulated around limestone particles. In 2 days, compared to the control specimen, pore percentages of cements containing 6% limestone are decreased whereas pore percentages of cement pastes containing 35% limestone are increased. The difference between porosities of the control paste and limestone cement paste is decreased at 28 days.
Page(s): 289-294
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.17(4) [August 2010]

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