1.0.1 This standard is established to regulate and unify test methods of long term performance and endurance quality of concrete and improve concrete test and inspection.
1.0.2 This standard is applicable to tests of long term performance and endurance quality of ordinary concretes in the engineering construction.
1.0.3 This standard specifies basic technical requirements of tests of long term performance and endurance quality of the ordinary concrete, and if this standard interferes with specifications in national law, administrative regulation, the national law and administrative regulation shall be conformed to.
1.0.4 Tests of long term performance and endurance quality of ordinary concrete shall conform to specifications of this standard and specifications in current national standards as well.
2 Terms
2.0.1 Ordinary concrete
Cement concrete with apparent density of (2000 ~ 2800) kg/m3
2.0.2 Resistance grade to freezing-thawing of concrete
Resistance class to freezing-thawing of concrete divided by the maximum cycle of freezing and thawing measured by slow freezing and thawing.
2.0.3 Resistance class to freezing-thawing of concrete
Resistance grade to freezing-thawing of concrete divided by the maximum cycle of freezing and thawing measured by rapid freezing and thawing.
2.0.4 Test method for coulomb electric flux
It is a test methods use coulomb electric flux to reflect chloride ion penetrating resistance of the concrete.
2.0.5 Test method for rapid chloride ions migration coefficient (RCM)
It is a test method to reflect chloride ion penetrating resistance of the concrete by testing length of penetration of chloride ions in the concrete and calculate the mobility ratio of chloride ions.
2.0.6 Resistance class to sulphate attack of concrete
Class of resistance of concrete to sulphate attack divided by the maximum wetting and drying cycle times measured by test method for resistance of concrete to sulphate attack
3 Basic Requirements
3.1 Sampling
3.1.1 Sampling shall conform to provisions in the current national standard GB / T 50080 "Standard for Test Method of Performance on Ordinary Fresh Concrete".
3.1.2 Mixture used by each set of specimens shall be sampled from the same tray or the same carriage.
3.2 Section size of specimen
3.2.1 The minimum section size of the specimen shall be selected according to specifications in Table 3.2.1.
Table 3.2.1 Minimum Section Size of Specimen
Maximum nominal grain size of aggregate (mm) Minimum section size of specimen (mm)
31.5 100×100 orφ100
40.0 150×150 orφ150
63.0 200×200 orφ200
3.2.2 The maximum nominal grain size of aggregate shall conform to provisions in the current professional standard JGJ 52 "Standard for technical requirements and test method of sand and crushed stone (or gravel) for ordinary concrete"
3.2.3 Specimen shall conform to the manufacture method for specimen moulds specified in JG 237 "Mould for Concrete Specimens".
3.3 Tolerance of specimen
3.3.1 The flatness tolerance of bearing surface of all the specimens shall not be more than the side length or diameter of the specimen by 0.0005 times.
3.3.2 Except for water-resisting specimen specimens, included angles between all the other specimens are 90° and the tolerance shall not exceed 0.5 °.
3.3.3 Unless the dimensional tolerance of specimen is specialized, the tolerance of side length, diameter or height of specimens shall not be more than 1mm.
