STUDI PENGARUH PENAMBAHAN TANAH LEMPUNG A-7 TERHADAP KUAT GESER TANAH PASIR SUNGAI
STUDI PENGARUH PENAMBAHAN TANAH LEMPUNG A-7 TERHADAP KUAT GESER TANAH
PASIR SUNGAI
Muhammad Rifqi Aufa
Teknik Sipil Fakultas Teknik
Sipil dan Perencanaan Universitas Gunadarna
E-mail:rifqiaufa18@gmail.com
ABSTRACT
Sand or the coarse grained soil is one type of soil
that often causes problems in civil engineering working. The weakness of this soil is not having holding capacity
each other. Sand is a kind of non-cohesive soil means has loose characteristic.
This characteristic can be repaired by gradation suitable or mixed with the
other type of soil that can make its shear strength increased. Clay soil A-7 is
one type of soil that has smooth grain and cohesive characteristic. Clay soil
A-7 is a plasticity soil that has high volume changed characteristic showed by
its loose percentage on sieve no.200 is more than 35%.The clay soil A-7 added
into this research was 0%, 15%, 20%, 25%, and 30%. The observation used direct
shear by standard compaction proctor. The result showed that the addition of
clay soil A-7 had significant effect on the river sand shear strength. The
maximum cohesion score was obtained on 25% clay soil A-7 at 32,197 KPa, the
maximum internal friction angle score was obtained on 15% clay soil A-7 at
38,15° and the maximum shear strength score was obtained on 15% clay soil A-7
at 156,295 KPa.
Key Words : River sand,
clay soil A-7, cohesion, internal friction angle, shear strength, direct shear
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