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A normal weight concrete weighs 2400 kg per cubic meter or 145 lbs per cubic foot (3915 lbs per cubic yard). Subtract the empty container weight from the full container weight (2) - (1) = weight of concrete (3) Divide the weight of concrete by the known volume (3) / (4) = density, or fresh unit weight There are a few unique procedures listed in the ASTM C138 to remember. Unit weight of steel 7850 kg/m3, cement 1440 kg/m3, sand (dry) 1540 to 1600 Kg/ m3, brick 1600 Kg/ m3, Aggregates 1750 kg/m3, bitumen 1040 kg/m3 1.5.5 Density. gcement = 3.15 x 62.4 lb/cu ft = 196.56 lb/cu ft Bulk specific gravity of concrete materials The 3.5 lb weight savings is not enough to make a significant difference, and normal density of concrete for counter tops is easier to polish. By Frank Bowen. The density of hardened concrete depends upon the unit weight of constituent materials and volume of void space. Learn how to use both to get the concrete you expect. Weight of the concrete per volume of concrete. per square foot. Malkit Singh, in Waste and Supplementary Cementitious Materials in Concrete, 2018. Weighing concrete in tonnes per cubic meter or kilograms kg, lb pounds per cubic foot or yd yards. Many concrete experts say that the single best onsite check is unit weight and yield. Significance and Use of ASTM C138. The unit weight of concrete (density) varies depending on the amount and density of the aggregate, the amount of entrained air (and entrapped air), and the water and cement content. The unit weight test indicates 0.25 cubic feet of concrete weighs 36.2 pounds. Aggregate shapeâs effect on concrete quality. Knowing the unit weight of a sample of concrete can help you figure out if your lightweight concrete is really lightweight, and is a good way to confirm youâre receiving the right mix of concrete for that particular setting. It is important to note that the Gs = gdry / gwater or gdry = Gs x gwater To determine the unit weight of a substance like cement, multiply the specific gravity of the cement by the unit weight of water. On inclusion of CBA as replacement of sand, unit weight of hardened concrete â¦ Generally specific gravity of CBA is significantly lower than natural sand. Deformed reinforcing bars come in grades 40, 60 & 75 (for 40 ksi, 60 ksi and 75 ksi yield Compressive strength is a concrete parameter used in combination with unit weight and air content to evaluate the durability of the superstructure concrete's exposure to freeze / thaw action, and exposure to deicing salts. Structural lightweight concrete has an in-place density (unit weight) on the order of 90 to 115 lb/ ft3 (1440 to 1840 kg/m3) compared to normalweight concrete with a density in the range of 140 to 150 lb/ ft3 (2240 to 2400 kg/m3). For structural applications the concrete strength should be greater than 2500 psi (17.0 MPa). and unit weight will decrease. Record the weight to the nearest 0.1% and include the unit of measurement. The series will be collaboratively written by Paul Ramsburg, technical sales specialist at Sika Corp., and Frank Bowen, quality control manager at Piedmont â¦ Determine whether the aggregate is sufficiently dry the unit weight of a dry material (gdry) divided by the unit weight of water (gwater). Automatic calculator for the specific unit weight of a volume of concrete in pcf, lb/ft^3, lb/yd^3, kg/m3, fresh wet concrete mix and dry cured hardened concrete. per square foot, while lightweight concrete weighs about 14.5 lbs. But with standard counter top thickness of 1.5 inches, normal weight concrete weighs about 18 lbs. Next, subtract the weight of the sample container from the combined weight of the sample container plus the dried aggregate sample. 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