Kombinasi Batu Pecah Dengan Variasi Tanah Putih Dan Pasir Sebagai Pembentuk Campuran Agregat Kelas A

TAPATAB, Demaris (2021) Kombinasi Batu Pecah Dengan Variasi Tanah Putih Dan Pasir Sebagai Pembentuk Campuran Agregat Kelas A. Undergraduate thesis, Universitas Katolik Widya Mandira Kupang.

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Abstract

The ability of the skeletal structure to accept loads and have resilience is largely determined by the upper layer of the foundation because it is a structure that directly receives the burden from the layer of the surface. Increasing demands for roads are expected, and it is expected that the roads already built will have the technical life as planned, that is, resistant to the weight of the wheel and the impact of the weather so that vehicles can run safely and smoothly. Testing the physical properties of the material consists of three consecutive tests, starting from sieve analysis testing, specific gravity testing, and abrasion testing. The material used in this study is coarse aggregate material, that is 1 1/2” crushed stone and madium aggregate material, that is 3/4” crushed stone, while for fine aggregate material, is sand and white soil. From the results of the examination of the specific gravity of coarse and fine aggregates, it can be seen that the average bulk density is 2.597, the SSD (saturated surface dry) density is 2.621, the apparent density is 2.675, and the effective density is 2.636. The effective specific gravity value is used to determine the zero air void line on the compaction chart. From the results of testing the density level with CBR values from variations in the composition of crushed stone with variations in white soil and sand, it shows that a mixture of class A aggregate composition will produce varying water content and dry density, the CBR value will increase with the addition of white soil and will decrease with reduction. white soil and addition of sand. As in variation 1 (20% white soil and 20% sand) produces a CBR value of 93.38%, variation 2 (25% white soil and 15% sand) produces a CBR value of 95.29%, variation 3 (30% white soil and 10% sand) produces a CBR value of 97.49%, variation 4 (15% white soil and 25% sand) produces a CBR value of 90.19%, variation 5 (10% white soil and 30% sand) produces a CBR value of 80.05%,

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