Abstract
This study investigated the physical and chemical effects of dolostone (DF) as fillers (10 to 30% by weight) in blended portland cements (BPC) and compared with limestone (LF) ground with similar fineness. The addition of both fillers increases the packing density of BPC up to 40% replacement and the standard mortar, while thewater film thickness was greater than those corresponding to PC up to a w/cm ~ 0.45. For increasing filler replacement, themini-slump decreases, the setting time is in advance and the hydration heat curves show ashorter dormant period, acceleration of C3S-hydration and greater sulfate depletion.These phenomena were more significant for LF. The hydrated compounds and it apparition sequence were similar at 20 °C for DF and LF, but no sign of harmful dedolomitization reaction was foundat 40 °C during 365 days.The compressive strength of the mortar after 28 days depends on the percentage of filler replaced, regardless of its mineralogical composition. Results suggest that DF, as occurs with LF, is a suitable additionas main component to BPC withsatisfactory and stable properties.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
