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Erwin Rommel1 & Yunan Rusdianto2 Jurusan Teknik Sipil Fakultas Teknik Universitas Muhammadiyah Malang Alamat Korespondensi :Jalan Raya Tlogomas 246 Malang 65144 email : erwin67pro@yahoo.com HP 08123314432 ABSTRACT The use of fly-ash as cementitious will be made to utilize physical and chemical properties of fly-ash that has a dominan of silica and good of modulus fines. The use of steam curing will be done in this study which can speed up the cycle of making concrete. This is advantageous in the production of precast concrete and velocity field construction. The research was conducted by making concrete cube 15x15x15 cm for 80 pieces and then tested the compressive strength and absorption of concrete. Achieve the quality of concrete made with the provision of K600 with giving the fly-ash respectively 7.5%, 15% and 30% by weight of cement. The results of the research obtained by the use of fly-ash as much as 7.5% as a cementitious that was given to the steam curing will provide the initial strength of concrete reached 47% of compressive strength at 28 days. While the effect of giving fly-ash in concrete has not seen absorption significantly when compared to concrete without fly-ash. Key word : concrete, fly-ash, steam curing

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PEMAKAIAN FLY-ASH SEBAGAI CEMENTITIOUS PADA BETON MUTU TINGGI DENGAN STEAM CURING (THE USE OF FLY-ASH AS CEMENTITIOUS ON HIGH-STRENGTH CONCRETE WITH STEAM CURING)