Multiply the volume by the concrete's density, typically 150 lb/ft (2,400 kg/m), to find the weight of your required concrete volume. Take the volume of the mold using this equation: volume × diameter × height / 4. Using superplasticizer 1% of cement weight has recorded increase in compressive and splitting strength of about 9.9% and 4.4% respectively for age 7 days, while 2.8% and 9% % respectively at age 28 days when compared to the reference mix.Ĭopyright © 2023 Praise Worthy Prize - All rights reserved. To know how much concrete you need to fill a cylinder mold: Measure the inner diameter and height of your mold. The effect of superplasticizer has been studied on 40% waste foundry sand mix. The 40% replacement has showed poor results. Waste foundry sand has been less effective in enhancing the flexural strength than compressive strength. The 30% replacement has recorded the more increase in compressive and splitting strength of about 25.6% and 17.2% respectively for age 7 days, while 10.7% and 15.6% respectively at age 28 days. Substitute waste foundry sand up to 30% has decreased workability and has increased the density. The chemical and the physical properties of foundry sand have been examined. Percentages (10%, 20%, 30%, and 40%) of waste foundry sand have been used and the results of workability, dry density, water absorption, compressive strength, split tensile and flexural strength with reference concrete mix that contain natural sand 100% have been compared. The effect of using foundry sand waste to partially replaced sand by weight in concrete has been studied in this paper. The reduction of natural sand used in concrete as fine aggregate due to widely concrete usage has led to search for another alternative to sand.
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