PENGARUH PEMANFAATAN ABU SEKAM PADI PADA BATA BETON RINGAN FOAM TERHADAP KUAT TEKAN, BERAT JENIS, DAN DAYA SERAP AIR SEBAGAI SUPLEMEN BAHAN AJAR MATA KULIAH TEKNOLOGI BETON (PADA MAHASISWA SEMESTER III PTB FKIP UNS)

Abstract

xt-stroke-width: 0px; "> The purposes of this research were to, (1) determine the influence of rice husk ash as
smooth aggregate partial substitute and foam variation towards compressive strength,
density, and absorption of lightweight foam concrete brick, (2) determine the percentage of
rice husk ash as smooth aggregate partial substitute and foam variation to achieve the
compressive strength which fulfilled SNI No. 03 – 0349 – 1989, (3) determine the
percentage of rice husk ash as smooth aggregate partial substitute and foam variation to
achieve the density lightweight concrete which fulfilled SNI No. 03 – 0349 – 1989, (4)
determine the percentage of rice husk ash as smooth aggregate partial substitute and foam
variation to achieve the absorption which fulfilled SNI No. 03 – 0349 – 1989, (5) produce
course material supplement of concrete technology on the influence of using rice husk ash in
lightweight foam concrete brick toward compressive strength, density, and absorption.
This research used experimental method and data analysis techniques used regression
analysis. Variables in the study were (1) dependent variables: compressive strength, density,
and absorption of lightweight foam concrete bricks, (2) independent variables: the substitute
of smooth aggregate to rice husk ash with variation 0%, 25%, 35%, and 45% and foam
variation 0,2 and 0,3 of concrete volume.
Based on the results of the study concluded that, (1) variation of rice husk ash and
foam was strongly influence towards the compressive strength, density, and absorption of
lightweight foam concrete bricks, (2) There was no percentage of rice husk ash and foam to
achieve the compressive strength of lightweight foam concrete brick which fulfilled SNI No.
03 – 0349 – 1989, (3) All percentages of rice husk ash and foam variation produced the
density value of lightweight foam concrete brick which fulfilled SNI No. 03 – 0349 – 1989, (4)
All percentages of rice husk ash and foam variation produced the absorption value of
lightweight foam concrete brick which fulfilled SNI No. 03 – 0349 – 1989, (5) the output
course materials was a course materials supplement about the influence of the use rice husk
ash as partly smooth agregate substitute of lightweight foam concrete brick to compressive
strength, density, and absorption.
Keywords: rice husk ash, foam, lightweight foam concrete bricks.