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[128370] Artykuł:

Physico-mechanical properties and hydration processes of cement pastes modified with pumice, trass and waste chalcedonite powder

Czasopismo: Materials   Tom: 17, Zeszyt: 1
ISSN:  1996-1944
Opublikowano: Grudzień 2023
 
  Autorzy / Redaktorzy / Twórcy
Imię i nazwisko Wydział Katedra Do oświadczenia
nr 3
Grupa
przynależności
Dyscyplina
naukowa
Procent
udziału
Liczba
punktów
do oceny pracownika
Liczba
punktów wg
kryteriów ewaluacji
Edyta Spychał orcid logo WBiAKatedra Technologii i Organizacji Budownictwa *****Takzaliczony do "N"Inżynieria lądowa, geodezja i transport60140.00140.00  
Martin Vyšvařil Niespoza "N" jednostki040.00.00  

Grupa MNiSW:  Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A)
Punkty MNiSW: 140


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Keywords:

cement paste  reduce CO2  additive  pumice  trass  waste chalcedonite powder  consistency  rheological measurements  compressive strength  hydration process 



Abstract:

In this article, the physico-mechanical properties and hydration processes of cement pastes containing three additives are introduced. Cement was replaced with pumice, trass, waste chalcedonite powder at 30% by mass and a combination of pumice or trass and waste chalcedonite powder in the amounts of 15% each. The main aim of this research was to assess the properties of two- or three-component binders to save cement in these binders. Rheological properties such as consistency, yield stress, viscosity and thixotropy were determined, in addition to porosity, 7-day and 28-day flexural and compressive strength and bulk density. Additionally, the heat evolution and degree of hydration of the tested pastes were compared. The use of all additives resulted in a reduction in the consistency of the tested pastes. The highest compressive strength measured after 28 days was observed for the cement paste with a 30% content of waste chalcedonite powder, which is related to it having the best pozzolanic activity of the materials used. The results of this research have confirmed that pumice, trass and waste chalcedonite powder can be used as components of blended Portland cements.