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D5370-14 – Standard Test Method Technical Guide
📋 Scope and Classification
ASTM D5370-14 specifies requirements for pozzolanic blended materials used in construction applications. These materials are intimate and uniform blends of two or more finely divided constituents, including coal fly ash, natural pozzolans, silica fume, and slag cement. The standard defines cement kiln dust as “the finely divided particulate matter carried from a cement kiln by exhaust gases.” Values in SI units are regarded as the standard.
Classification includes six types: Type F (Class F fly ash), Type C (Class C fly ash), Type CKD (cement kiln dust), Type S (ground granulated blast furnace slag), Type SF (silica fume), and Type M (metakaolin). Blends are labeled in descending order of component mass, e.g., 60% Class F fly ash, 30% slag, 10% cement kiln dust is designated as Type FSCKD.
📊 Referenced Standards and Ordering Specifications
This standard references multiple ASTM documents for material definitions and testing. The following table lists key standards:
| 📏 Standard | 📐 Description |
|---|---|
| C618 | Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete |
| C989 | Specification for Slag Cement for Use in Concrete and Mortars |
| C1240 | Specification for Silica Fume Used in Cementitious Mixtures |
| C311 | Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use in Portland-Cement Concrete |
| C593 | Specification for Fly Ash and Other Pozzolans for Use With Lime for Soil Stabilization |
Ordering information per Section 5 must include the specification designation D5370, quantity, classification, intended use, and optionally request manufacturer certification.
💡 Tip: Attaining an intimate and uniform blend is challenging—manufacturers require adequate equipment and controls (Note 1). Ensure consistency for compliance.
⚠️ Warning: Users must establish safety and health practices and determine regulatory applicability before use (Section 1.3).
❓ Frequently Asked Questions
🔍 What is a pozzolanic blended material per D5370?
It is a pozzolan from an intimate and uniform blend of two or more finely divided materials as defined in Section 3.1.2.
⚡ Which material types are covered?
The types include Class F and C fly ash, cement kiln dust, slag, silica fume, and metakaolin (Types F, C, CKD, S, SF, M).
📌 How are blended materials labeled?
They are labeled in order of highest mass percentage, e.g., Type FSCKD for a blend with 60% F, 30% S, 10% CKD.
💡 Where to find definitions of other terms?
Other terms are defined in Terminologies C125 or C219 and Specifications C618, C989, and C1240.