The Use of Fly Ash as Additive Material to High Strength Concrete

Abstract

Abstract. The use of coal waste (Fly Ash) is currently being developed in building materials technology, as a high-strength concrete mix material. This study aims to determine the strength of concrete by adding fly ash as a substitute for cement in high-strength concrete mixtures. This research was conducted with an experimental method to obtain results and data that would confirm the variables studied. The total number of specimens used in this study were 36 pieces with different sizes of cube tests which were 15 cm x 15 cm x 15 cm. A total of 36 concrete samples were used to test the compressive strength of concrete with a percentage of Fly Ash in 0% (normal concrete), 20%, 25% and 30% with a concrete treatment age of 7 days, 21 days and 28 days. A total of 12 more samples were used to test water absorption in concrete at 28 days of maintenance. Each percentage percentage of Fly Ash uses 3 concrete test samples. The increase in compressive strength occurs at 7, 21 and 28 days in concrete. However, the compressive strength of concrete produced by concrete using the percentage of Fly Ash is always lower than the value of normal concrete compressive strength. From testing the compressive strength of concrete at 28 days of treatment with content of 0%, 20%, 25% and 30% Fly Ash obtained results of 45.87 MPa, 42.67 MPa, 40.89 MPa, and 35.27 MPa respectively

Pengaruh Fly Ash Dan Bottom Ash (Faba) PLTU sebagai Campuran Paving Blok ditinjau terhadap Kuat Tekan dan Daya Serap Air

“…Dari segi karakteristik bottom ash hampir sama dengan karateristik pasir, sehingga memungkinkan apabila digunakan sebagai bahan altematif pengganti agregat halus (pasir) pada campuran pembuatan pembuatan beton, batako ,paving blok, dan sebagainya. Penggunaan 100% bottom ash dapat diterapkan pada beton dimana kelecakan bisa diabaikan, misalnya pada pembuatan paving [7].…”

The Effect of Fly Ash Utilization in Reinforcement Concrete: A Review

“…There have been many research works on the utilization of fly ash in improving the quality of concrete and decreasing global emissions. Fly ash utilization of coal waste combustion is developed in building materials technology with various mixtures to get higher-strength concrete [11]. In its utilization of high-quality concrete, fly ash has the size of smooth granules, and this makes concrete denser.…”

“…Fly ash utilization based on renewable energy from biomass could be part of the strategy in achieving the Renewable Energy Mix 23% 2025 in Indonesia [11] and could contribute to reducing CO2 emission.…”

Performance of the Pivot Hooks to Enhance the Flexural Capacity of Bamboo Reinforced Concrete Beams

“…This phenomenon indicates that the production of rebar is becoming massive each year, along with its associated emissions, namely carbon dioxide, Sulphur oxide, nitrogen oxide, and other particulates. Due to the escalating environmental impact of cement and rebar production, alternative materials need to be discussed (Dixit, et al, 2019) (Riofrio, et al, 2022), such as the utilization of ground glass and coal bottom ashes (Kasaniya, et al, 2021), fly ashes (Pangestuti, et al, 2018), and bamboo leaf (Odeyemi, et al, 2022).…”