Measurement of length changes

Moulds, gauges studs, and length comparator are used to measure length changes due to shrinkage or expansion according to the main International Standards ASTM C490, C151, C157, C596, EN 12617-4, UNI 6687, EN 12808-4 and EN 1770. For measuring expansion due to the Alkali-Silica reaction, please consult the dedicated section