CEN STANDARD SAND

उत्पाद वर्णन

Characteristics:

 * Natural Siliceous Sand: It's a Quartz/silica sand, primarily composed of silica (SiO_2), with a minimum silica content of 98%.

 * Rounded Particles: The particles are generally isometric and rounded in shape, which contributes to consistent packing and workability in mortar mixes.

 * Clean and Processed: It undergoes drying, screening, and meticulous preparation in specialized facilities to ensure quality and consistency.

 * Specific Grain Size Distribution: This is a defining characteristic. CEN Standard sand has a very precise particle size distribution, typically ranging from 0.08 mm to 2.00 mm. The exact distribution is defined by standards like EN 196-1 and ISO 679.

 * Low Moisture Content: The maximum moisture content is very low, typically less than 0.2% by mass of the dried sample.

 * Packaging: It's usually packaged in precisely weighed bags, often 1350 ± 5 g, to facilitate accurate mixing ratios in laboratory tests.

Uses:

The primary use of CEN Standard sand is in controlling the strength of cement and other hydraulic binders. This involves:

 * Preparation of Mortar Prisms: It's a key component in the standard mortar mix used to create test specimens (prisms) for compression and flexural strength tests. According to EN 196-1, a typical mix involves 450 ± 2 g cement, 225 ± 1 g water, and one bag of 1350 ± 5 g CEN Standard sand.

 * Compressive and Flexural Strength Testing: These mortar prisms are then tested to determine the compressive and, optionally, flexural strength of the cement. This allows manufacturers and users to assess if the cement meets its specified strength requirements.

Standards:

CEN Standard sand conforms to international standards, most notably:

 * EN 196-1: This is the European standard for "Methods of testing cement - Part 1: Determination of strength." It specifies the requirements for CEN Standard sand, including its particle size distribution and use in mortar preparation.

 * ISO 679: This is the International Organization for Standardization equivalent, "Cement - Test methods - Determination of strength."

In essence, CEN Standard sand is a meticulously controlled and consistent material that underpins the accuracy and reproducibility of cement strength testing, which is vital for quality control in the construction industry.