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细集料有机物含量试验装置

Organic Impurities Test Sets

细集料有机物含量试验装置

Organic Impurities Test Sets — Aggregate Testing Equipment

Organic matter in sand can retard cement setting and lower strength, so concrete sand is routinely screened with a simple colour test. We supply graduated glass bottle sets, a glass colour standard comparator, a digital colorimeter for objective readings, an EN humus content set and a field kit for checks at the pit. Whether you need a visual pass/fail or a recorded number decides the choice. Typical references are ASTM C40, AASHTO T 21 and BS EN 1744-1.

5 models Range code OIT OEM available

Applicable standards

ASTM C40 AASHTO T 21 ASTM C87 BS EN 1744-1 IS 2386 (Part 2)

How to specify

  1. Make up fresh 3% sodium hydroxide solution regularly; weak solution gives falsely light colours.
  2. Read the colour in daylight or a standard light box, never under coloured lighting.
  3. If sand fails the colour test, follow up with mortar strength comparison to ASTM C87 before rejecting it.
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Models in this range

5 models

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Single instruments, complete laboratories or government tenders — our export engineers prepare the configuration, proforma invoice and shipping documents.