The utilization of fly ash from the residual of coal combustion can be used in concrete innovatio... more The utilization of fly ash from the residual of coal combustion can be used in concrete innovation because it has a small size as cement substituent and filler with a proportion of ≥50%. Fly ash contains high silica (SiO2) functions as a pozzolan which can bind the results of the residual cement hydration reaction with water in the form of crystals of Ca(OH)2 to CSH gel which can increase the strength of concrete, this innovation is known as High Volume Fly ash (HVFA) concrete. The use of other added materials in the form of superplasticizer so that the concrete can compact by itself aims to overcome the problem of forming cavities in reinforced concrete, this innovation is known as Self Compacting Concrete (SCC). If the innovations are combined can be called HVFA-SCC concrete. This study examines stress-strain and compressive strength of HVFA-SCC concrete against normal concrete with 50% fly ash content at 28 days. The samples of concrete are made in the form of cylinders measuring 150 mm x 300 mm as much 5 samples. HVFA-SCC concrete were characteristics by 3 methods: flow table test, L-box test, and V-funnel test. The result of the test showed that maximum stress between HVFA-SCC concrete and normal concrete achieved when the strain value 0.005-0.006. The compressive strength value of HVFA-SCC concrete is greater than normal concrete, it can be concluded that the addition of fly ash can increase the strength of concrete.
The utilization of fly ash from the residual of coal combustion can be used in concrete innovatio... more The utilization of fly ash from the residual of coal combustion can be used in concrete innovation because it has a small size as cement substituent and filler with a proportion of ≥50%. Fly ash contains high silica (SiO2) functions as a pozzolan which can bind the results of the residual cement hydration reaction with water in the form of crystals of Ca(OH)2 to CSH gel which can increase the strength of concrete, this innovation is known as High Volume Fly ash (HVFA) concrete. The use of other added materials in the form of superplasticizer so that the concrete can compact by itself aims to overcome the problem of forming cavities in reinforced concrete, this innovation is known as Self Compacting Concrete (SCC). If the innovations are combined can be called HVFA-SCC concrete. This study examines stress-strain and compressive strength of HVFA-SCC concrete against normal concrete with 50% fly ash content at 28 days. The samples of concrete are made in the form of cylinders measuring 150 mm x 300 mm as much 5 samples. HVFA-SCC concrete were characteristics by 3 methods: flow table test, L-box test, and V-funnel test. The result of the test showed that maximum stress between HVFA-SCC concrete and normal concrete achieved when the strain value 0.005-0.006. The compressive strength value of HVFA-SCC concrete is greater than normal concrete, it can be concluded that the addition of fly ash can increase the strength of concrete.
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