Perubahan cuaca mengakibatkan terjadinya siklus pembasahan dan pengeringan secara berulang – ulang, sehingga tanah akan mengalami perubahan volume tanah akibat perubahan kadar air dan menurunnya faktor – faktor pendukung parameter fisik tanah. Didalam penelitian ini diambil tanah lempung yang berada pada Proyek 6 Ruas Jalan Tol Dalam Kota Seksi A Jakarta Utara, dimana tanah ini akan di berikan perilaku siklus pembasahan dan akan dilihat pengaruh penggunaan semen dan limbah serbuk ban terhadap karakter fisiknya. Tujuan penelitian ini mempelajari pengaruh perubahan musim (perubahan kadar air) terhadap karakteristik fisik tanah berupa kadar air, berat jenis tanah, dan batas konsistensi tanah (Atterberg) yang telah dicampur bahan tambah berupa limbah serbuk ban dan semen portland pcc. Pada pengujian ini digunakan variasi kadar semen 10% dan limbah serbuk ban sebanyak 0%, 5%, 10%, 15%, 20% dari berat kering tanah. proses siklus pembasahan yaitu presentase penambahan air ditentukan dari penjumlahan antara kadar air awal (Wi) dengan persentase kadar air dikalikan dengan selisih antara kadar air jenuh dengan kadar air awal (Wsat – Wi) sebesar 0%, 25%, 50%, 75%, dan 100%. Dari hasil pengujian didapatkan bahwa pengaruh proses pembasahan membuat parameter fisik meningkat karena proses pembasahan, akan tetapi menurun ketika mulai dicampur dengan semen portland pcc dan limbah serbuk ban.

The changing of the weather results in a repeated cycle of wetting and drying, so that the soil will change the volume of the soil by changing water levels and decreasing factors-supporting the physical parameters of the soil. In this study, clay was taken on project 6 of the freeway in the A section of North Jakarta, where the land will be treated in the cycle of wetting and will be seen as a result of the use of cement and waste by crumb rubber on the physical character. The goal is to study the effects of season changes (changes in water levels) on the physical characteristics of soil with water levels, soil density, and soil consistency limits (atterberg limits) that have been mixed with other ingredients in the waste of crumb rubber and of Portland PCC cement. At this test we use 10% cement levels and crumb rubber waste by 0%, 5%, 10%, 15%, 20% of the land's dry weight. This wetting cycle of presentation of water is determined by the amount of water between the initial water levels (wi) and the percentage of water levels multiplied by the proportion of saturated water content to the initial water (wsats) by 0%, 25%, 50%, 75%, and 100%. The result is that the effect of the wetting process increases the physical parameters because of the handling, however, decreases when it begins to be mixed with Portland PCC cement and waste powder tyres.