ANALISIS PENGARUH PENAMBAHAN CEMENT ADDITIVES (CA) TERHADAP KUAT TEKAN DAN PANAS HIDRASI PADA SEMEN PORTLAND TIPE OPC
DOI:
https://doi.org/10.33795/distilat.v12i3.7454Keywords:
cement additives, kuat tekan, OPC, panas hidrasi, panas termalAbstract
Semen Portland tipe OPC merupakan material utama dalam industri konstruksi karena memiliki sifat mekanik yang baik dan ketersediaan yang luas. Namun, proses produksinya menghadapi kendala berupa aglomerasi partikel pada tahap penggilingan serta peningkatan suhu akibat reaksi hidrasi yang tidak terkendali. Penambahan cement additives (CA) menjadi salah satu strategi untuk meningkatkan efisiensi penggilingan sekaligus memperbaiki kualitas mekanik dan termal dari semen. Penelitian ini bertujuan untuk menganalisis pengaruh penambahan tiga jenis CA (CA01, CA02, dan CA03) terhadap kuat tekan dan panas hidrasi semen OPC. Metode yang digunakan meliputi pencampuran CA dengan semen, pembuatan sampel mortar, pengujian kuat tekan pada hari ke-3, ke-7, dan ke-28 serta pengujian panas hidrasi. Uji panas hidrasi dilakukan menggunakan alat thermography test untuk mengukur suhu puncak, waktu puncak, serta waktu pengikatan awal dan akhir. Hasil penelitian menunjukkan bahwa seluruh CA mampu meningkatkan kuat tekan dan mempercepat reaksi hidrasi dibandingkan dengan sampel tanpa CA. Sampel CA03 menunjukkan performa terbaik dengan kuat tekan tertinggi (556 kg/cm2) dan suhu puncak tertinggi (67,69°C) panas hidrasi yang signifikan. Hasil penelitian menunjukkan bahwa penggunaan CA yang terbukti optimal berdasarkan hasil pengujian mampu meningkatkan sifat mekanik dan termal pada semen OPC, sehingga cocok untuk aplikasi konstruksi yang membutuhkan kekuatan awal tinggi serta waktu pengerasan yang singkat.
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