Pemanfaatan Limbah Cangkang Kepiting terhadap Peningkatan Nilai California Bearing Ratio (CBR) pada Tanah Lempung Ekspansif di desa Panempan kabupaten Pamekasan Madura

Utilization of Crab Shell Waste for Increasing California Bearing Ratio (CBR) on Expansive Soil in Panempan Village Pamekasan District Madura

Di desa Panempan kabupaten Pamekasan Madura memiliki permasalahan, yaitu kerusakan pada dinding bangunan rumah yang menunjukkan keretakan dan kerusakan perkerasan jalan berupa ambles dan pengelupasan. Kemampuan tanah dasar sangat penting untuk konstruksi atau beban yang berada diatasnya. Tanah lempung ekspansif memiliki sifat kembang susut yang sangat tinggi sehingga dapat menyebabkan kurangnya keamanan dan kenyamanan pada pengguna jalan.

Penelitian ini menggunakan metode stabilisasi tanah dengan pencampuran bahan tambah berupa limbah cangkang kepiting dari Restoran Kepiting Cak Gundul “1992” cabang Sidoarjo dan Surabaya. Stabilisasi dengan limbah cangkang kepiting diharapkan dapat memperbaiki nilai California Bearing Ratio (CBR) tanah asli sebagai tanah dasar (subgrade) pada jalan raya di desa Panempan kabupaten Pamekasan Madura. Variasi penambahan limbah cangkang kepiting yang digunakan dalam penelitian ini ialah 0%, 10%, 20%,30%, dan 40%.

Hasil uji laboratorium yang telah dilakukan didapat nilai California Bearing Ratio (CBR) untuk penetrasi 0,1” berturut-turut mulai dari 0%, 10%, 20%,30%, dan 40% maka didapat nilai California Bearing Ratio (CBR) sebagai berikut 2,33%, 14,03%, 18,60%, 19,43%, dan 14,90%.

Agar memenuhi persyaratan nilai California Bearing Ratio (CBR) tanah asli sebagai tanah dasar (subgrade) maka diperlukan penambahan limbah cangkang kepiting minimal sebesar 1% menurut SNI 1744-2012 atau 3%-7% menurut Bowles. Dapat disimpulkan bahwa penambahan limbah cangkang kepiting terhadap tanah lempung ekspansif di desa Panempan kabupaten Pamekasan Madura terhadap nilai California Bearing Ratio (CBR)  memiliki batas optimal yaitu pada penambahan 30%.

Kata Kunci: Ekspansif, Stabilisasi, Cangkang Kepiting, CBR

In Panempan village Pamekasan district Madura has a problem, that is damage at the house wall showed crack and damage at the road pavement showed in form of sink in and exfoliating. The ability of subgrade is very important for construction or mass on it. Expansive clay soil has  very high shrinkage properties that can cause lack of safety and comfort for roadway user.

This research used soil stabilization with additive method in the form of crab shell waste from Kepiting Cak Gundul “1992” Restaurant Sidoarjo and Surabaya branch. Stabilization with crab shell waste is expected to fix California Bearing Ratio (CBR) value of native soil as subgrade at roadway in Panempan village Pamekasan district Madura. The variation of crab shell waste addition that used in this research is 0%, 10%, 20%,30%, and 40%.

The laboratory results that has been done obtained California Bearing Ratio value for 0,1” penetration in a row start from 0%, 10%, 20%,30%, and 40% then obtained California Bearing Ratio (CBR) value as follows 2,33%, 14,03%, 18,60%, 19,43%, and 14,90% .

In order to fill the requirement of California Bearing Ratio (CBR) value of native soil for subgrade then required addition of crab shell waste in minimal 1% based on SNI 1744-2012 or 3%-7% based on Bowles. Can be conclused that crab shell waste addition on expansive clay soil in Panempan village Pamekasan district Madura to California Bearing Ratio (CBR) value has an optimal limit that is the addition of 30% percentage.  

Keywords: Expansive, Stabilization, Crab Shell, CBR