PENGARUH PENAMBAHAN FLY ASH TERHADAP KUAT TEKAN, BERAT JENIS, DAN DAYA HAMBAT PANAS BATA BETON RINGAN FOAM SEBAGAI SUPLEMEN BAHAN AJAR MATA KULIAH TEKNOLOGI BETON PADA MAHASISWA SEMESTER III PTB JPTK UNS

Abstract

The purposes of this research were, (1) determine the effect of fly ash added with
variations of 0%, 10%, 20%, 30% and foam added with variation 30% and 40% on
compressive strength, density, and thermal resitance of lightweight foam concrete bricks, (2)
determine the percentage of fly ash and foam that produces thermal resistance that satisfied
required compressive strength on lightweight foam concrete bricks SNI 03-2847-2002. (3)
determine the percentage of fly ash and foam added that produces minimal density
lightweight foam concrete bricks, and (4) produce supplement teaching materials obtained in
the course of concrete technology on the effect of the fly ash addition to the compressive
strength, density, and thermal resistance of lightweight foam concrete bricks.
This research used experimental method and data analysis techniques used regression
analysis. Variables in the study were (1) dependent variables: compressive strength, density,
and thermal resistance of lightweight foam concrete bricks, (2) independent variables: the fly
ash addition with variations 0%, 10%, 20%, and 30% to the needs of fine aggregate and
variations addition of foam 30% and 40% of the concrete volume with the water and foam
agent ratio = 1:40.
Based on the results of the study concluded that, (1) variation of the addition of fly
ash and foam was strongly influencing the compressive strength, density, and thermal
resistance of lightweight foam concrete bricks, (2) thermal resistance with concluded
compressive strength on lightweight foam concrete bricks SNI 03-2847-2002 produced from
30% of the concrete volume foam added with the percentage fly ash added of 10%, 20%, and
30% of fine aggregate respectively were 27.6 kg /cm2; 29.3 kg/cm2; and 35.0 kg/cm2, (3) the
minimal density of lightweight foam concrete bricks produced on the percentage of fly ash
addition of 0% (without the fly ash addition) with 40% foam addition of the concrete volume
that was 855.565 kg/m3, (4) produced tecahing materials in the form of supplements teaching
materials about the effect of the fly ash addition to the compressive strength, density, and
thermal resistance of lightweight foam concrete bricks.
Keywords: fly ash, foam, lightweight foam concrete brick, compressive strength, density,
thermal resistance.