Rheological and mechanical properties of mortars prepared with natural and manufactured sands

D. D. Cortes; H. K. Kim; A. M. Palomino; J. C. Santamarina

doi:10.1016/j.cemconres.2008.03.020

Rheological and mechanical properties of mortars prepared with natural and manufactured sands

D. D. Cortes, H. K. Kim^*, A. M. Palomino, J. C. Santamarina

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

142 Scopus citations

Abstract

The conventional assessment methods for fine aggregate used in Portland cement concrete are mostly based on round natural sand performance in spite of the increasing use of angular manufactured sands. Two natural and two manufactured sands were selected and tested at different water-cement ratios and fine aggregate-to-cement ratios for the same standard gradation to identify shape-related differences on the mechanical performance of mortars. Three tests were used in this study: flowability, stiffness and strength. Results showed that adequate flow and compressive strength were attained when the volume of paste exceeded the volume of voids in the loosely packed aggregate, i.e., just above the maximum void ratio e_max of the fine aggregate. Given the dependence of e_max on particle shape, mixture predesign can be facilitated by taking aggregate shape into consideration.

Original language	English (US)
Pages (from-to)	1142-1147
Number of pages	6
Journal	Cement and Concrete Research
Volume	38
Issue number	10
DOIs	https://doi.org/10.1016/j.cemconres.2008.03.020
State	Published - Oct 2008
Externally published	Yes

Keywords

Aggregate
Compressive strength
Mixture proportioning
Mortar

ASJC Scopus subject areas

Building and Construction
General Materials Science

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10.1016/j.cemconres.2008.03.020

Cite this

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title = "Rheological and mechanical properties of mortars prepared with natural and manufactured sands",

abstract = "The conventional assessment methods for fine aggregate used in Portland cement concrete are mostly based on round natural sand performance in spite of the increasing use of angular manufactured sands. Two natural and two manufactured sands were selected and tested at different water-cement ratios and fine aggregate-to-cement ratios for the same standard gradation to identify shape-related differences on the mechanical performance of mortars. Three tests were used in this study: flowability, stiffness and strength. Results showed that adequate flow and compressive strength were attained when the volume of paste exceeded the volume of voids in the loosely packed aggregate, i.e., just above the maximum void ratio emax of the fine aggregate. Given the dependence of emax on particle shape, mixture predesign can be facilitated by taking aggregate shape into consideration.",

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AU - Cortes, D. D.

AU - Kim, H. K.

AU - Palomino, A. M.

AU - Santamarina, J. C.

PY - 2008/10

Y1 - 2008/10

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AB - The conventional assessment methods for fine aggregate used in Portland cement concrete are mostly based on round natural sand performance in spite of the increasing use of angular manufactured sands. Two natural and two manufactured sands were selected and tested at different water-cement ratios and fine aggregate-to-cement ratios for the same standard gradation to identify shape-related differences on the mechanical performance of mortars. Three tests were used in this study: flowability, stiffness and strength. Results showed that adequate flow and compressive strength were attained when the volume of paste exceeded the volume of voids in the loosely packed aggregate, i.e., just above the maximum void ratio emax of the fine aggregate. Given the dependence of emax on particle shape, mixture predesign can be facilitated by taking aggregate shape into consideration.

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KW - Compressive strength

KW - Mixture proportioning

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Rheological and mechanical properties of mortars prepared with natural and manufactured sands

Abstract

Keywords

ASJC Scopus subject areas

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