CD Tesis
Perilaku Mekanik Bata Ringan Cellular Lightweight Concrete Dengan Penambahan Silica Fume
Cellular lightweight concrete (CLC) bricks have practical and economic
advantages in implementing construction so that the market demand for light
bricks has increased over the last few years. The use of cellular lightweight
concrete bricks in general as a non-structure in the form of walls and roof plates.
One way to reduce the density of light concrete bricks is to add air pores in a
mixture of cement paste or mortar, the addition of air pores is done with the
addition of foaming agents. This study aims to analyze the optimal blend
composition on Cellular Lightweight Concrete brick type with the addition of
silica fume. Cube specimens made with size 10 x 10 x 10 cm to get the percentage
of silica fume optimum with variation in the 5 composition that is 0%, 5%, 10%,
15% and 20%. Of the percentage of silica fume optimum then made the test object
beam with a size of 10 x 20 x 60 cm with a treatment at the age of 7 days, 14 days,
28 days and 56 days. Mechanical testing performed is a compressive strength
evenly on the top of the light brick. The measurement instruments used in this
study were load cell as load gauges and the Linear Variable Differential
Transformer (LVDT) to measure the shortening that occurs on the load surface.
The output data that can be obtained from this test are compressive strength,
shortening and modulus of elasticity. The results of the optimum compressive
strength of the test piece 10 x 10 x 10 cm is obtained on the composition of silica
fume 10 % that is equal to 1.03 MPa. The value of average compressive light
brick size is 10 x 20 x 60 cm at the age of 7 days by 0.66 MPa, 14 days of 0.85
MPa, 28 days of 1.03 MPa and 56 days is 1.04 MPa. The results of the numerical
analysis LUSAS results obtained optimum compressive strength of 1.06 MPa and
decreased to 9.2 mm with the value of the modulus of elasticity of 29.44 N/mm2. It
is expected that the results of this research can be used as reference material in
the industry and light brick research with silica fume added can increase the
strength of lightweight bricks by 25% than lightweight bricks without silica fume.
Keywords: Cellular lightweight concrete, Shortening, Compressive strenght,
Modulus elasticity, Silica fume
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