Standard Method of Test for
Estimating the Strength of Concrete in Transportation
Construction by Maturity Tests
AASHTO Designation: T 325-04
1.1.This standard provides procedures for estimating concrete strength in roads, bridges, and other transportation structures through the use of a maturity index.
1.2.This standard requires determination of the strength-maturity relationship of the approved concrete job mix in the laboratory, and determination of the temperature history subsequent to placement in the field.
1.3.This standard may involve hazardous materials, operations, and equipment.
It does not purport to address all of the safety concerns associated with its use.
It is the responsibility of the user of this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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