The Effect of Vibration Energy Changes on Compressive Strength of Concrete Paving Block (CPB) in Concreting Process with Vibropressing System

. The Concrete which has low w/c, or Concrete Paving Block (CPB) requires technology in the compaction process. Compaction with vibropressing technology is a compaction technology that combines vibrations and presses that carried out simultaneously. The objection of the research is finding the effect of vibration energy changes on CPB compressive strength characteristics. The research method accordance with the ACI method used the volume proportioning of the mixture are 1 cement: 4 fine aggregate: 4 coarse aggregate with w/c ratio 0.6 and the target compressive strength of the average CPB 18.3 N / mm2. Coarse aggregates take from processing rock breakers with a grain size of 0-5 mm. The samples were tested using a treatment method using a regulator with parameters as a measure to observe the CPB compressive strength characteristics. The settings in question are frequency, vibration time, and pressure during production. This study was conducted repeatedly using a 4 HP electric motor for the first and using a 7HP electric motor. The results showed differences that occurred, starting from recording data on vibration acceleration fluctuations when installing 4HP and 7HP. The higher the vibration energy, the higher the number of vibrations, and the higher the compressive strength produced.