THE INFLUENCE OF CEMENT BYPASS DUST ON THE PROPERTIES OF CEMENT CURING UNDER NORMAL AND AUTOCLAVE CONDITIONS
Journal Title: Structure and Environment - Year 2019, Vol 11, Issue 1
Abstract
This paper analyses the properties of cement binders composed with cement CEM I 42.5R and cement bypass dust in amount of 0.5, 1.0 and 5.0% by mass of binder, curing under standard and additionally autoclave conditions. The bypass dust increases the water content for standard consistency and delays the initial setting time of binder. The cement paste containing 5% of dust reveals the change in volume by 6 mm according to Le Chatelier test. After 2 days, the compressive strength of cement mortar containing bypass is comparable to that of Portland cement mortar, but at later time the strength development of this cement binder is slower. The addition of cement bypass dust in amount to 1% can obtain the cement of strength class of 42.5R according to standard PN-EN 197-1. The autoclave curing improves the compressive strength of cement mortar. The SEM/EDS observations confirm the presence of low crystalline C-S-H gel and well-formed tobermorite fibres in autoclaved cement mortar containing 5% of cement bypass dust.
Authors and Affiliations
EWELINA TKACZEWSKA
PECULIARITIES OF PHASE PROCESSES IN THE VOLUME OF LIQUID
The work is devoted to the study of the transient processes of heat and mass transfer in the volume of a liquid. The method of calculating the temperature field in a liquid takes into account phase transitions, motion of...
DISPERSED PHASE BREAKUP AT EMULSION BOILING
In this paper we consider the breakup processes of the emulsion dispersed phase. The possibility of large droplets splitting by small ones under boiling water phase due to a sharp release of pressure is shown, we also ta...
NON-LINEAR MASTIC CHARACTERISTICS BASED ON THE MODIFIED MSCR (MULTIPLE STRESS CREEP RECOVERY) TEST
Mastic containing asphalt in its composition is an example of a viscoelastic material. It is an effective binder in asphalt. It consists of a filler (<0.063 mm) and asphalt mixed in the right proportions. Just like in as...
IMPACT OF TEMPERATURE ON KINEMATICALLY ADMISSIBLE FAILURE MECHANISMS OF ENERGY-ACTIVE SEGMENTS OF STEEL HALLS
The paper analyses the impact of temperature on kinematically admissible failure mechanisms (KAFMs) of energy-active segments of steel halls. The static scheme of segment construction allows the separation of tilt and be...
INFLUENCE OF HYDRATED LIME ON THE PROPERTIES OF FILLER-BITUMEN COMPOSITE
To guarantee the quality of warm mix asphalt, one of the prerequisites is to provide adequate adhesion between the bituminous binder and the aggregates. To achieve this goal, filler-bitumen mixes were examined with a rep...