EN 1744-1 Aggregate Chemical Testing

Support material performance and compliance with Celtest’s specialist aggregate chemical testing services. Our laboratory provides high-capacity, high-precision testing in accordance with BS EN 1744-1, delivering reliable results to contractors, quarries and consultants across the UK and Ireland.

Chemical composition plays a critical role in the durability and long-term behaviour of construction materials. Celtest provides clear, standards-compliant data to support project specifications, quality control and risk management.

Construction Chemistry You Can Rely On

Celtest operates a dedicated construction chemistry laboratory designed to process high volumes of samples while maintaining consistent accuracy.

Our testing supports:

  • Compliance with specification and regulatory requirements
  • Assessment of material suitability for construction use
  • Identification of harmful constituents
  • Quality control for large-scale infrastructure projects

We combine capacity, technical expertise and efficient workflows to ensure results are delivered when you need them.

Specialist Aggregate Testing to BS EN 1744-1

We provide a comprehensive range of chemical tests in accordance with BS EN 1744-1:2009 + A1:2012 (tests for chemical properties of aggregates).

Sulfates, Sulfur & Sulfides

Understanding sulfur-related compounds is essential to prevent durability issues such as sulfate attack and material instability.

  • Water Soluble Sulfate (Clause 10.1) – Determines sulfates extractable by water
  • Acid Soluble Sulfate (Clause 12) – Measures total sulfate content
  • Total Sulfur Content (Clauses 11.1 & 11.2) – Assesses overall sulfur presence
  • Oxidisable Sulfides (Clauses 11 & 12) – Identifies sulfides prone to oxidation
  • Acid Soluble Sulfides (Clause 13) – Analysis of sulfide minerals soluble in acid

Contamination & Organic Content

Detection of contaminants is critical to ensuring concrete performance and consistency.

  • Lightweight Contaminants (Clause 14.2) – Identifies materials such as coal or lignite
  • Humus Content (Clause 15.1) – Detects organic matter affecting cement hydration
  • Fulvo Acid (Clause 15.2) – Identifies organic compounds causing interference or staining

Solubility & Chlorides

Chemical solubility and chloride levels are key factors in reinforced concrete durability.

  • Water Solubility (Clauses 16.1 & 16.2) – Measures soluble material content
  • Chloride Ion Content (Clause 7) – Assesses risk of reinforcement corrosion

What We Do

We deliver independent chemical testing of aggregates to support compliance, design and material approval. All testing is carried out in accordance with recognised standards, with clear results provided for technical reporting and decision-making.

How We Work With You

  • You provide sample details and testing requirements
  • We confirm the relevant standards and test schedule
  • Testing is completed in our specialist chemistry laboratory
  • You receive accurate, structured results to support your project

Why Partner with Celtest?

  • High-Capacity Laboratory – Designed for major infrastructure and bulk sample volumes
  • Fast Turnaround Times – Efficient workflows to minimise project delays
  • Standards Compliance – Testing aligned with BS EN 1744-1 requirements
  • Reliable Data – Clear, consistent outputs to support specification and reporting

Frequently Asked Questions

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