PEMANFAATAN ECO PROCESSED POZZOLAN SEBAGAI SUBSTITUSI SEMEN DALAM PEMBUATAN BETON TERHADAP PENGUJIAN KUAT TEKAN BETON
Keywords:
Eco Processed Pozzolan, substitusi semen, kuat tekan betonAbstract
Produksi semen Portland (OPC) menyumbang emisi karbon dioksida yang signifikan, sehingga diperlukan bahan substitusi ramah lingkungan seperti Eco Processed Pozzolan (EPP), hasil pemurnian Spent Bleaching Earth (SBE) limbah industri kelapa sawit. Penelitian ini bertujuan mengetahui pengaruh substitusi EPP (0%, 5%, 10%, 15%) terhadap kuat tekan beton mutu f'c 25 MPa menggunakan metode eksperimental dengan benda uji silinder 15 x 30 cm pada umur 7, 14, dan 28 hari (36 sampel). Hasil menunjukkan nilai slump menurun konsisten seiring bertambahnya kadar EPP (14 cm menjadi 12 cm). Pada umur 7 dan 14 hari, kuat tekan variasi 5% dan 10% EPP lebih rendah dari kontrol, namun pada umur 28 hari seluruh variasi EPP melampaui kontrol, dengan nilai tertinggi pada substitusi 15% sebesar 34,3 MPa (naik 38,31% dari 24,8 MPa). Peningkatan ini disebabkan reaksi pozzolanik yang optimal pada umur matang. Kadar substitusi optimum belum diperoleh karena kuat tekan masih terus meningkat hingga kadar tertinggi yang diuji.
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