Strength Analysis Of Concrete
Analysis comparison of strength concrete using Rice Husk Ash (RHA), Corn Cob Ash (CCA), and sugar cane straw ash (SCSA) for blended cement concrete
1. Introduction
Generally , Cement is one of the materials used in construction. This is because cement is an adhesive material between components in a building. Cement will react when given water. This reaction makes the cement solid and binds other particles.
Currently , The demand for cement is very high because it is very important uses. In this case the particles that will be used to make cement are reduced or exhausted, in another side, the cost to buy cement is very expensive. For this problem needed materials to replace the cement and also the material effect on the quality of concrete
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The percentage of cement mixture with CCA is from 0%, 5%, 10%, 15%, 20% and 25% by weight of cement, which will be used as cement replacement material. Sharp sand and granite are used as aggregates, this aggregate is obtained from Ogbomoso, Nigeria. The compressive strength test will be performed with a steel cube the size of 100 mm x 100 mm x 100 mm. In which the concrete has been mixed with a mixture of CCA cement in accordance with a predetermined proportion. The mixture that has been released from the mold will be soaked in water and then tested to determine the compressive strength at the age of 3, 7, 28, 60, 120, and 180 days. the mix proportions of (cement : sand : granite) used are (1:1½:3, 1:2:4 and …show more content…
The sugarcane straw is burned with a temperature of 700 degrees Celsius for 6 hours. After that the SCSA that has been burned is filtered out to separate with the dregs that have not been burned perfectly. After it is mill for 50 minutes to increase Pozzolan activity. The cement used is cement from brazil CPV ARI. Sand used from the Brazilian city of Castilho which has a finite modulus of 2.05 and weighs 2667 kg / m3. Concrete will be made with mold size 40 x 40 160 mm3. The proportion of water / cement is 0.5 and the ratio of cement to sand is 1 / 2.5. The percentage of SCSA addition was 0%, 15%, 20%, 25%, and 30% to the weight of cement. The compressive strength test was performed after the concrete was 3,7,28, and 90 days in immersion.
3. Discussions
3.1 Rice Husk Ash
The strength generated from the RHA mixture with cement for 1 to 28 days shows the strength will continue to increase from the control strength to 15% increase in RHA, after which the strength will decrease to the limit of 30% addition of RHA, in addition results are not much different or equally With control strength. As for the addition of more than 30% RHA, will be lower compression strength when compared with the control strength.
it is a table of compressive strength of concrete mixed in
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