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Alfiona, Vera and Budianto Kromodiryo, Johan (2021) PENGARUH PENAMBAHAN CANGKANG KEONG (FLY ASH) DENGAN PERSENTASE 1%, 2% DAN 3% DAN SIKACIM CONCRETE ADDITIVE SEBESAR 0,7% TERHADAP KUAT TEKAN BETON THE EFFECT OF ADDITIONING CONCH SHELL (FLY ASH) WITH PERCENTAGE 1%, 2% AND 3% AND A MASSIVE CONCRETE ADDITIVE SYSTEM 0.7% AGAINST THE STRENGTH OF CONCRETE PRESS. Tugas Akhir thesis, University of Technology Yogyakarta.