Comparative Study of Methods to Measure the Density of Cementitious Powders
| Autor: | Chiara F. Ferraris, Dale P. Bentz, Michelle A. Helsel |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Cement
Kerosene Materials science Mechanical Engineering 0211 other engineering and technologies Slag 02 engineering and technology Test method 021001 nanoscience & nanotechnology Article Volume (thermodynamics) Mechanics of Materials Gas pycnometer Fly ash visual_art 021105 building & construction visual_art.visual_art_medium General Materials Science Cementitious Composite material 0210 nano-technology |
| Zdroj: | Journal of Testing and Evaluation. 44:20150148 |
| ISSN: | 0090-3973 |
| DOI: | 10.1520/jte20150148 |
| Popis: | The accurate measurement of the density of hydraulic cement has an essential role in the determination of concrete mixture proportions. As more supplementary cementitious materials (SCM), such as fly ash, and slag, or cement replacements materials such as limestone and calcium carbonate are used in blended cements, knowledge of the density of each powder or of the blended cement would allow a more accurate calculation of the proportions of a concrete mixture by volume instead of by mass. The current ASTM standard for measuring cement density is the "Test Method for Density of Hydraulic Cements" (ASTM C188-14), which utilizes a liquid displacement method to measure the volume of the cement. This paper will examine advantageous modifications of the current ASTM test, by alcohol substitutions for kerosene. In addition, a gas (helium) pycnometry method is evaluated as a possible alternative to the current standard. The described techniques will be compared to determine the most precise and reproducible method for measuring the density of hydraulic cements and other powders. |
| Databáze: | OpenAIRE |
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