Open AccessOptimization of Flyash Composition and Drying Timein Water Absorption and Compressive Strength Concrete Brick
Author(s) -
Nurzal,
M.Febri Rezha Perdana,
Agustin Gunawan,
H. Ikhsan,
R. Ranjes
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1364/1/012069
Subject(s) - fly ash , brick , absorption of water , compressive strength , materials science , building material , aggregate (composite) , cement , environmental science , waste management , composite material , engineering
One of the most crucial components of construction materials is concrete bricks that can be applied to the walls of houses, office buildings and fences. Concrete brick is a ceramic material that has brittle properties and to increase its strength and reduce the weight of concrete brick, fly ash is used as a mixture in concrete brick material. Fly ash which is the residual combustion or coal waste from the Sigantang Sawahlunto Power plants with a variety of composition fly ash and concrete bricks drying time which aims to determine the optimal conditions in water absorption and compressive strength test which refers to SNI 03-0349-1989 standard and light or normal concrete brick. The material used is sand plus aggregate, cement and water as a binder, with fly ash as added material. The composition variations are 0, 5, 10 and 15 wt.% fly ash Then it is compacted manually with size (34 × 12 × 9) cm 3 based on SNI 03-0349-1989 standard. After that it is dried for 7, 14, 21, 28, and 35 days. The results showed that the optimal composition was on the addition of 5 wt.% fly ash with a drying time of 28 days resulting in Water Absorption 7.84 % quality and compressiv strength 51.98 kg/cm 2 quality III of SNI 03-0349-1989 which can be applied to constructions that do not carry loads, for insulating walls (under the roof).