A concrete mix has the following ratio, excluding water, of cement:sand:gravel (3:6:7). How much gravel would be needed in 860 cubic meters of the dry mix?
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A concrete mix has the following ratio, excluding water, of cement:sand:gravel (3:6:7). How much gravel would be needed in 860 cubic meters of the dry mix?
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- For concrete production, we mix 625 kg of fine aggregate and 830 kg of coarse aggregate. The fine aggregate has a moisture content of 2.3% and absorption of 3.2%, whereas the coarse aggregate has a moisture content of 1.5% and absorption of 2.8%. Calculate the amount of water required to increase the moisture contents of both fine and coarse aggregate to reach absorption?In proportioning a concrete mix, the coarse and fine aggregates had the following properties respectively; Coarse: Dry weight: 800lb, 3,2% MC, 2.0% AC, Fine: Dry weight 350 lb, 1.2% MC, 2.9% AC. How much should the water be adjusted to account for the agregate moisture?info given the properties of ingredients used for concrete mixture that might have a significant influence on the environmental . discuss four criteria in the mix design that support sustainable construction. portland cement 208 kg/m^3 slag cement 178 kg/m^3 silica fume 30 kg/m^3 coarse aggregate 1068 kg/m^3 fine aggregate 712 kg/m^3 water 178 kg/m^3 air content 6%
- A concrete aggregate mix must contain at least 31% sand by volume for proper batching. One source of material, which has 25% sand and 75% coarse aggregate, sells for $3 per cubic meter (m3). Another source, which has 40% sand and 60% coarse aggregate, sells for $4.40/m3. Determine the least cost per cubic meter of blended aggregates.Strength requirements, in MPa – 30.68 Mpa Water cement ratio, in decimal – 0.45 Coarse aggregate requirements (dry), in kg/m3 – 992.kg/m3 Air content, in percent – 3.5% Water content, kg/m3 – 184 kg/m3 Cement, in kg/m3 – 408.89 kg/m3 Determine the Admixtures in ml/m3 Fine aggregate requirements (dry), in kg/m3 Net Water Content, in kg/m3A concrete mix has a ratio os 1:2:4 by mass. The properties of thematerials to be used are tabulated below.MATERIALS. SPECIFIC GRAVITYCEMENT 3.33SAND 2.65GRAVEL 2.67Cement weighs 40 kg per bag. Use 24 liters of water per bag of cement Compute the volume of cement solids per bag of cement in cu m.Compute for the required volume of sand solids per bag of cement.Compute for the volume of concrete that can be produced per bag of cement 0.1
- A sample of lightweight coarse aggregate weighs 532.3 g when oven-dried, 615.7 g when saturated surface-dried, and 191.3 g when submerged. Calculate the bulk specific gravity, apparent specific gravity, and percent absorption.A concrete mix with a 75 mm slump, w/c ratio of 0.50, and sand with a fineness modulus of 2.4 contains 1009 kg/m3of coarse aggregate. Compute the required mass of coarse aggregate per cubic meter. To adjust the mix so as to increase the compressive strength, the water–cement ratio is reduced to 0.45. Will the quantity of coarse aggregate increase, decrease, or stay the same? Explain your answer.For fine aggregate: bulk specific gravity=2.60, SSD Bulk Specific Gravity=2.63, apparent Specific gravity= 2.68, percent absorption=1.54% For coarse aggregate= bulk specific gravity= 2.62, SSD specific gravity=2.63, apparent specific gravity= 2.65, percent absorption=1.70% From the data above, what can you conclude about these bulk aggregate, ssd bulk specific gravity, apparent specific gravity, and percent absorption? What is the effect of these value in concrete?
- Fine aggregate sample was tested to find its physical properties. The test results were as follows: Bulk specific gravity= 2.45, Apparent specific gravity= 2.5, mass of the vessel full of water = 1300 gm, mass of the vessel plus sand and topped up with water= 1500 gm, mass in wet condition 518 gm. Calculate 1- absorption% 2- moisture content% 3- Bulk density 4- Apparent density500 gm oven dry fine aggregate was tested to find its physical properties. The output from the test was as follows: SSD = 510 gm, mass of the vessel full of water = 1200 gm, mass of vessel plus sand and topped up with water= 1500 gm, mass in wet condition 518 gm, Apparent specific gravity= 2.5 . The grading of the fine aggregate is in the table below. Answer the followings: 1-Moisture content % is 2- The mass of oven dried sand isIf my total evaporable moisture is 2.2% and my total surface moisture is 1.3%, is it a good aggregates or not? What does it imply if this aggregate is used in construction?