Pengaruh Substitusi Abu Terbang PLTU Amurang Terhadap Campuran Roller Compacted Concrete

Abstrak

Roller Compacted Concrete or milled solid concrete is a mixture of concrete that has zero slump with a low cement water factor, concrete that is compacted using a roller compactor is added with fly ash which is a pozzolan, pozzolan is an added material that contains silica and aluminum compounds which are these compounds. a lot of content in cement (binding). The purpose of adding fly ash to this mixture is to prevent excessive heat of hydration from the cement and as a provider of aggregate that is less than sieve no. 200 to meet the needs of pasta and can increase workability (ease of work).

Concrete mix planning is based on SNI 03-2834-2000 "Procedures for making normal concrete mix plans" and adjusted to ACI 207.5R-99 "Roller-Compacted Mass Concrete". The required compressive strength of concrete is 25 MPa with a test age of 7, 14 and 28 days using cube and beam specimens and the compaction is simulated using a standard proctor compactor.

The results of testing the compressive strength of normal RCC concrete are 25.45 MPa and the optimal results are found to be in the variation of 15% fly ash with a compressive strength value of 26.65 MPa at a test age of 28 days and for the results of the flexural strength found in the Normal RCC variation of 6, 24 MPa and 15% fly ash variation of 6.59 MPa at the age of 28 days.