The influence of redispersible polymer powders on setting time of cementitious mortars

Vol. 543 (11) 2017 / poniedziałek, 5 listopada, 2018

(in Polish)

M. Kulesza,
D. Dębski

DOI: 10.15199/33.2017.11.54

Volume 543; Issue 11
Pages 138-140

Accepted for publication: 12.09.2017 r.

Redispersible polymer powders are chemical additives commonly used in construction to modify the properties of mortars. The aim of the study was to compare the influence of two selected redispersible polymer powders of different chemical nature on setting time of cementitious mortar. Setting time was assessed throught the analysis of the propagation velocity of the ultrasonic wave in hardening mortar. Conducted research has shown that the presence of redispersible polymer powders in mortars can cause the setting time retardation of Portland cement – the retardation correlates with the amount of additive in mortar. The simplifed mechanism of this retardation is proposed based on the analysis of experimental results.

Keywords: redispersible polymer powders; cementitious mortar; setting time; ultrasonic wave velocity measurement.
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Marcin Kulesza, MSc. Eng. - Atlas sp. z o.o.

Dawid Dębski, Ph. D., Eng. - Atlas sp. z o.o.

Marcin Kulesza, MSc. Eng.

Full paper is available at Publisher house SIGMA-NOT Sp. z o.o. webpage

DOI: 10.15199/33.2017.11.54