The effect of curing in soil and compound on compressive strength of concrete quality fc’ 25 MPa

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Concrete is a material that dominates high-rise building construction materials, because concrete materials are easy to obtain and able to withstand very large loads. In addition, concrete can be made in various forms so that according to needs and can beautify the shape of a building, easy to maintain, durable and relatively cheap prices. But in the implementation of using concrete, there are times when found concrete needs to be perforated on its appearance for the purposes of supporting facilities for building functions such as sanitation, gas, hydrants and others. To increase the compressive strength of concrete so that it meets the desired requirements in addition to the quality of the material, the casting process is also required after the casting. This treatment can be done by several methods, among others: immersion in water, wrapped in wet burlap sacks, watering with water, spraying by compounding, and can also be done by landfilling. Through treatment is expected to be obtained the quality of concrete as planned. Because with the maintenance of concrete, the security of the building structures made of concrete will be assured security. Beside that, concrete is required for minimum usage of 50 years. Therefore the research was carried out with the title “Effect of Soaking (Curing) in Soil and Compound on Compressive Strength of Concrete Quality Fc ’25” MPa by using 40 cylindrical concrete specimens and each treatment consisted of 8 test specimens with 300 high dimensions mm and a diameter of 150 mm. Results of a strong test of concrete press performed after the concrete aged 14 days and subsequently converted to a 28-day old concrete produce : Strong high average press that is on concrete with the treatment of using water immersion with a strong press of 23.78 MPa, while the lowest average press is in concrete with the treatment of using a strong burlap sack with a tekasn of 21.88 MPa. Concrete elastic modulus testing using 4 specimens produces an average modulus of elasticity of 24919.59 Mpa.