Concrete technology over time increasingly experiencing growth, this is done to improve the quality of the concrete is to obtain a high strength and durability. This study aimed to obtain a high quality concrete by using fly ash as a cement material to replace up to 50% (high volume fly ash concrete). This research was conducted by examining the development of compressive strength of concrete high volome fly ash at the age of 14 days, 28 days and 56 days, testing the flexural strength of concrete high volome fly ash at the age of 56 days, to test the value of the modulus of elasticity of concrete high volome fly ash at the age of 56 days and test the water absorption value volome high fly ash concrete at the age of 56 days, as well as a comparison that is testing without a mixture of fly ash concrete (normal concrete). Both mixtures using fas low that using superplasticizer 1 % to achieve good workability upon mixing. The planned strength of concrete is 45 MPa using ACI with a slump value of ± 10 cm. From this study showed that the compressive strength of normal concrete and concrete HVFA respectively at the age of 14 days amounted to: 37.9 MPa and 28.8 MPa, at 28 days amounted to: 39.9 MPa and 39.4 MPa, and at the age of 56 days amounted to: 41.6 MPa and 42.5 MPa. The test results for the flexural strength of normal concrete and concrete HVFA each is 8.8 MPa and 8.6 MPa. Results of testing the modulus of elasticity of concrete for normal concrete and concrete HVFA each is 34108 MPa and 37 726 MPa. The test results of water absorption of concrete for normal concrete water absorption up to 1.745% and for concrete HVFA water absorption up to 1,431%. From these data indicate compressive strength and flexural strength of concrete HVFA has a value which is comparable to normal concrete, the modulus of elasticity of concrete HVFA larger than normal concrete and concrete water catchment HVFA smaller than normal concrete
