Analisa Pengaruh Durasi Dan Urutan Campuran Agregat Terhadap Kuat Tekan Beton

Abstract

Concrete along its development in the building construction is often used as a structure such as columns, beams, foundations or plates, and can be used for other things.Especially in the production mixing of concrete, generally consist of water, cement, fine aggregate (sand), and coarse aggregate (gravel), where on the mixing concrete process experience the problem in mixing sequences and rotation time of stirring concrete forming material using the Molen machine.This study used the K225 quality of concrete by the testing tool a cylinder in a 15 cm diameter and a 30 cm height.The aims of the study were to find out the influence of duration and mixture sequence towards the concrete compressive strength value and to find out the result of different compressive strength. It might not from the research process conducted to the influence of time duration and mixing sequence of concrete forming material. The concrete production formula used the ACI method and SK SNI T-15-1990-03. Then, based on the research been conducted, the mixing sequence of gravel, sand, cement, water obtained a good final compressive strength, compared to the other variations by 24.46 Mpa average and stirring time of 4 minutes, so it was higher than the quality plan.Although the variations of water, sand, gravel, cement obtained the lowest compressive strength by 14.88 Mpa average and stirring time of 20 minutes, so it was a lack in the quality plan, still can be used in the field.Thus, the longer the stirring did does not mean the better the result or the faster the stirring did does not mean the worse the result. So, in processing the stirring of concrete, it is needed to record the planning time also the mixing sequence to produce a good compressive strength.