产品介绍

I. Product Overview

The NJJH-320 Alkali-Aggregate Reaction Length Measuring Instrument is primarily used to measure changes in specimen length during alkali-aggregate reaction tests. It features a simple structure, convenient operation, and accurate and rapid measurement, making it an essential instrument for alkali-aggregate reaction testing.

II. Compliance Standards

Complies with DLT5151-2014 [Code for testing aggregates of hydraulic concrete].

III. Product Features

1. No need to adjust the clamping head; simply place the specimen on the tester to secure it instantly.

2. Minimizes the specimen’s exposure to the external environment.

3. Accurately reads the specimen’s shrinkage and expansion values within 3 seconds.

4. The body is made of high-quality aluminum alloy, ensuring robustness and durability.

IV. Technical Specifications: 

Measurement Range: 280–320 mm

Measurement Accuracy: 0.01 mm (dial gauge) or 0.001 mm (micrometer)