MATEC Web Conf.
Volume 322, 2020MATBUD’2020 – Scientific-Technical Conference: E-mobility, Sustainable Materials and Technologies
|Number of page(s)||8|
|Section||E-mobility, Sustainable Materials and Technologies|
|Published online||14 October 2020|
Influence of fly ash on the pore structure of mortar using a differential scanning calorimetry analysis
Kielce University of Technology, Faculty of Civil Engineering and Architecture, Al. Tysiąclecia PaństwaPolskiego 7, 25-314 Kielce, Poland
* Corresponding author: firstname.lastname@example.org
In the paper a low-temperature thermoporometry using differential scanning calorimetry (DSC) was employed for analyse of influence of siliceous fly ash (FA) on pore structure of non-air-entrained mortars (pore size, connectivity). A method of interpreting a heat flux differential scanning calorimetry records in pore structure was used for this purpose. The results demonstrated that the: (i) fly ash mortars have virtually no pores inaccessible to water, unlike the mortars with plain Portland cement in which inaccessible pores constitute a significant fraction, growing with the increase in w/b; (ii) with a decrease in w/b the ink-bottle volume decreases. Fraction of this pore type is relatively larger in fly ash mortars; (iii) Siliceous fly ash increased the volume of pores greater than 8 nm, in particular in the group with radii larger than 20 nm at all w/b ratios.
© The Authors, published by EDP Sciences, 2020
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