A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SCC-mortars made of fine aggregates with different particle shapes
Modified formulations of self compacting concrete causes in higher content of sand and powder with the use of effective plasticizers. This paper examines the action of fine aggregates up to 2 mm with regard to their granulometric properties in the use of basic mortars. Photo-optical methods allow measuring the particle size and shape of fine and also coarse aggregates simultaneous and describing them numerical. The relationship between the granulometric properties particle size distribution, particle shape and the bulk material property packing density was described quantitatively. Workability was investigated by using two different procedures. First the simple but workable procedures of slump cone and funnel flow time. Second the rheological behaviour characterized with both parameters yield stress and plastic viscosity. Rheological measurements were generated by using the Viskomat NT with the basket cell. Results of slump cone and funnel flow time permit the conclusion that workability of SCC-mortars depends on packing density as well as on roughness of the used sand. The rheological measurements shows that particle roughness also influences the parameters yield stress and plastic viscosity.
SCC-mortars made of fine aggregates with different particle shapes
Modified formulations of self compacting concrete causes in higher content of sand and powder with the use of effective plasticizers. This paper examines the action of fine aggregates up to 2 mm with regard to their granulometric properties in the use of basic mortars. Photo-optical methods allow measuring the particle size and shape of fine and also coarse aggregates simultaneous and describing them numerical. The relationship between the granulometric properties particle size distribution, particle shape and the bulk material property packing density was described quantitatively. Workability was investigated by using two different procedures. First the simple but workable procedures of slump cone and funnel flow time. Second the rheological behaviour characterized with both parameters yield stress and plastic viscosity. Rheological measurements were generated by using the Viskomat NT with the basket cell. Results of slump cone and funnel flow time permit the conclusion that workability of SCC-mortars depends on packing density as well as on roughness of the used sand. The rheological measurements shows that particle roughness also influences the parameters yield stress and plastic viscosity.
SCC-mortars made of fine aggregates with different particle shapes
SCC-Mörtel aus feinen Zuschlagstoffen mit unterschiedlichen Korngrößen
Ostheeren, Katrin (author) / Stark, Ursula (author) / Mueller, Anette (author)
2009
7 Seiten, 6 Bilder, 9 Quellen
Conference paper
English
SCC-MORTARS MADE OF FINE AGGREGATES WITH DIFFERENT PARTICLE SHAPES
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