The Effect of Stirring Time and Concrete Compaction on K-200 Concrete Press Strength

Abstract

Abstract Concrete is a component that has an important function for buildings, both in the form of buildings, housing, highways, and other public facilities. The use of concrete, which is getting longer and higher, also has to maintain the quality of the concrete. One of the problems in concrete is the problem of compaction, the existence of cavities in concrete is a problem that if left unchecked will be fatal, concrete that has an automatic cavity will also reduce the value of concrete compressive strength, concrete compaction usually uses a vibrator or vibrator, but in reality the use the vibrator is used in a random way and does not have a fixed time rule, so the concrete is not evenly packed. This study discusses the compressive strength of concrete are produced with a mixture of the same sample but with different rules vibration time s ehingga find the time to achieve the maximum compressive strength of concrete. For the average value of the highest compressive strength produced by concrete withthe duration of Concrete Mix At 30 minutes and vibrator For 5 minutes with strong average value press concrete reaching 202.67 kg / cm2. While the value of the lowest compressive strength is produced byconcrete Durationof Concrete Mix At 30 minutes and vibrator For 10 Minutes above can be seen strong average value press concrete reaching 158.22 kg / cm2