Penelitian ini bertujuan untuk menganalisis pengaruh penggunaan material limbah berupa Sludge electrocoagulation (SEC), metakaolin, dan fly ash terhadap mutu paving block, khususnya dalam hal kekuatan tekan. Penggunaan material alternatif ini bertujuan untuk mengurangi ketergantungan pada semen konvensional serta memberikan solusi terhadap permasalahan limbah industri. Metode penelitian yang digunakan adalah eksperimen laboratorium dengan membuat variasi campuran dari ketiga bahan tersebut, kemudian dilakukan pengujian kuat tekan sesuai standar SNI 03-0691-1996. Hasil penelitian menunjukkan bahwa kombinasi penggunaan SEC, metakaolin, dan fly ash dalam proporsi tertentu mampu meningkatkan kuat tekan paving block secara signifikan. Secara khusus, hasil penelitian menunjukkan bahwa variasi optimum diperoleh pada kadar SEC 5%, dengan kuat tekan rata-rata sebesar 23,66 Mpa dan daya serap air sebesar 3,73%. Nilai tersebut memenuhi persyaratan SNI 03-0691-1996 dan termasuk ke dalam kategori mutu B paving block, sehingga layak digunakan untuk lahan area parkir.

This study aims to analyze the influence of using industrial waste materials such as Sludge electrocoagulation (SEC), metakaolin, and fly ash on the quality of paving blocks, particularly in terms of compressive strength. The use of these alternative materials seeks to reduce dependence on conventional cement and to provide solutions to industrial waste issues. The research method applied was laboratory experimentation by creating several variations of material mixtures, followed by compressive strength testing in accordance with SNI 03-0691-1996 standards. The results revealed that the combination of SEC, metakaolin, and fly ash in specific proportions significantly enhanced the compressive strength of paving blocks, even surpassing the minimum required standard. Specifically, the findings indicate that the optimum variation of SEC was achieved at 5%, which produced an average compressive strength of 23,66 Mpa and a water absorption of 3,73%. These values meet the requirements of SNI 03-0691-1996, placing the paver blocks in the B class category that suitable for parking lot applications