GB/T 14840-1993
Chemical analysis of limestons for free silica (English Version)

Standard No.

GB/T 14840-1993

Language

Chinese, Available in English version

Release Date

1993

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Be replaced 2011-02

Replace By

GB/T 14840-2010

Latest

GB/T 14840-2010

Scope

This standard specifies the method for the determination of free silica (fSiO₂) in limestone. This standard applies to the determination of free silica in limestone. It can also be used for the determination of free silica in ordinary Portland cement raw meal. Measuring range: 1% to 10% of free silica.

GB/T 14840-1993 history

• 2010 GB/T 14840-2010 Methods for chemical analysis of limestones.Determination of free silicon dioxide content
• 1993 GB/T 14840-1993 Chemical analysis of limestons for free silica