Standard Specifications for Mineral Admixtures--An Overview


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Title: Standard Specifications for Mineral Admixtures--An Overview

Author(s): P. K. Mehta

Publication: Special Publication

Volume: 91


Appears on pages(s): 637-658

Keywords: blast furnace slag; chemical analysis; fly ash; mineral admixtures; performance; physical properties; pozzolans; silica; specifications; standards; General

Date: 2/1/1986

Concern is growing that prescriptive and separate standards are an obstacle to widely using such by-product mineral admixtures as fly ash, granulated slag, and condensed silica fume. Since natural as well as by-product pozzolanic and cementitious admixtures offer similar technical benefits when used in concrete, it is desirable to develop a single performance-oriented standard. With this objective, the principal chemical and physical requirements of a few selected standards are reviewed, with a focus on fly ash and its relevance to current materials. A rational approach is suggested and specific recommendations made toward developing a performance standard to cover all mineral admixtures.