·According to the regulations of US ASTM C617 standard it is allowed to use high strength gypsum in capping cylindrical concrete specimens Compared with other methods gypsum capping is the most convenient efficient rapid and safest capping method 100% pure gypsum to produce the high strength capping gypsum without adding extra filler
·Standard ASTM C617/AASHTO T231 Capping Compound Gypsum capping compound for high strength capping preparation it can achieve strength from 5000 9000 psi 350 630 kgf/cm² after mixing with water for 30 mins Gypsum is a fast safer easier and cheaper method compound with sulfur capping rubber pad capping and grinding process Technical
·Compared with other methods gypsum capping is the most convenient rapidest and safest capping method 2 TAIWAN CAPSTONE uses 100% pure gypsum to produce the high strength capping gypsum without adding extra filler This procedure conforms to the regulations of ASTM C617 standard 3 The water gypsum ratio for S 350 is
· Alternative Capping Method Using Gypsum Cement Materials—See Fig 1 for capping setup Spread the gypsum cement capping material evenly on the top surface of the specimen Bring the casting plate which has been lightly coated with oil or sprayed with TFE fluorocarbon coating Note 9 into contact with the capping paste; firmly press
· This practice covers apparatus materials and procedures for capping freshly molded concrete cylinders with neat cement and hardened cylinders and drilled concrete cores with high strength gypsum paste or sulfur mortar The values stated in either SI units or inch pound units are to be regarded separately as standard
be high strength gypsum cement While ASTM C1552 allows for gypsum and sulfur capping material only gypsum is acceptable for capping concrete pavers for compressive strength testing 6HFRQG WKH¿QDOFDSWKLFNQHVVFDQQRWH[FHHG LQ mm This is KDOIof the allowable thickness for other caps per ASTM C1552 In order to achieve thin caps the plastic
·5 Capping Materials The strength of the capping material and the thickness of the caps shall conform to the requirements of Table 1 If sulfur mortar high strength gypsum plaster and other materials except neat cement paste are to be used to test concrete
Around 30 mins the strength of the gypsum can reach 5 000 9 000 psi 350 630 kgf/cm2 This type of gypsum is mostly used in the capping material for concrete compression test according to ASTM C617 standard so our high strength Capping Gypsum the offer the convenient and excellent testing material for civil engineering industry
·Procedures used for preparing the high strength gypsum cement capping materials shall ensure that water cement ratios used for each batch provide the required strength N OTE 4ÑThe water gypsum cement ratio should typically be between and Use of low water gypsum cement ratios and vigorous
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