Q4 (25%): 0% Find the total air content (%) in the mix, knowing that the constructed pavement has a total weight (WT 798400 kg) and total volume (VT - 320 m³). The used aggregate is non-absorbent Ps₂-0 = % by Wt. of Material Total Mix Sp. Gravity (gm/cm³) (Gs) Coarse Aggregate 44 2.65 Fine Aggregate 40 2.70 Mincral Filler 11 2.80 Asphalt (Ps) 5 1.02
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- H.W select a mix proportional of 28-day compressive strength (measured on standard cubes) of 56 MPa , slump of 65 mm; uncrushed aggregate with a maximum size of 10 mm; specific gravity of aggregate of 2.64, zone 2 of fine aggregate, repaid setting Portland cement to be used. The percentage absorption of fine aggregate is 1.25% ,and coarse aggregate 2.3% the max. w/c 0.4 and min. cement content 390 kg/m3.Design a Mix for the following Data. Specified strength = (99.5) MPa, Required Slump = 80 mmMaximum size of aggregate = 25 mm, FM of fine aggregate = 2.40Grading of aggregate as satisfied by ASTM C33 (American Society for Testing and Materials)SSD specific gravity of fine and coarse aggregate = 2.75Rodded bulk density of coarse aggregate = 1600 kg/cubic mAbsorption Capacity of coarse aggregate = 0.9 %Absorption Capacity of fine aggregate = 0.5 %Moisture Content of fine and coarse aggregate = 2 %Exposure Conditions = Normal12) Suppose that the following mix design was obtaincd at the lab before making any field adjustments for aggregate moisture content: Cement 307.4 Fly ash Water Coarse ageregate (SSD) 1019.7 Fine aggregate (SSD) 43.5 193 781.1 Further suppose that the aggregates have the following properties: (by mass Coarse ageregate Fine aggregate Absorption Capacity 0.5% 0.9% Moisture Content 03% 1135 a) Determine the moisture state of the coane and fine aggregates. (ie wet, SSD, or air dry) b) Cakulate the field mix design weights (show your caleulations): Field Cement Fly ash Water Coarse aggregate (SSD) Fine aggregate (SSD)
- Q3/: TILM We require a mix with a mean 28-day compressive strength of 26.5 MPa the size of the member and the spacing of the reinforcement require a slump of 50 mm and a Q maximum size of aggregate of 20 mm. Portland cement type I is used with specific gravity of 3.15, dry-rodded unit weight of coarse aggregate 1700 kg/m³ and bulk specific gravity (SSD) of 2.55. The fineness modulus of fine aggregate is 2.8 and bulk specific gravity (SSD) of 2.5. No air entrainment is required. Neglect water absorption and moisture content of both aggregates. The aggregates conform to the ASTM C33-84 requirements for grading. Estimate the quantity of (cement, fine aggregate, coarse aggregate and water) for 1m³ concrete.A 2000 g coarse aggregate sample in SSD condition weighed 1272 g when immersed in water. The same sample when dried in oven weighed 1984 g. Calculate the SSD bulk specific gravity, apparent specific gravity, absorption capacity and dry bulk specific gravity of the aggregate. 3 Ca 15:38 5EEהבןה F5 F6 F8 F9 F10 F11 F12 PAT SC PAUSE DEL END INSERT BREAK ). 9] %3D -> Sv2 O} NUM BACKSPACE T Y P 7 ENTER HOME G H K L B 1 SHIFT END すv :0We require a mix with a mean 28-day Required Average Compressive Strength of 35 MPa the size of the member and the spacing of the reinforcement require a slump of 50 mm and a maximum size of aggregate of 31 mm. Portland cement type I is used with specific gravity of 3.15, dry-rodded unit weight of coarse aggregate 1750 kg/m³ and bulk specific gravity (SSD) of 2.55. The fineness modulus of fine aggregate is 2.8 and bulk specific gravity (SSD) of 2.5 ,No air entrainment is required. Neglect water absorption and moisture content of both aggregates. The aggregates conform to the ASTM C33-84 requirements for grading. Estimate the quantity of (cement, fine aggregate, coarse aggregate and water) for 1m³ concrete.
- We require a mix with a mean 28-day compressive strength of 40 MPa the size of the member and the spacing of the reinforcement require a slump of 45 mm and a maximum size of aggregate of 28 mm. Portland cement type I is used with specific gravity of 3.15, dry-rodded unit weight of coarse aggregate 1750 kg/m³ and bulk specific gravity (SSD) of 2.55. The fineness modulus of fine aggregate is 2.8 and bulk specific gravity (SSD) of 2.5 ,No air entrainment is required. Neglect water absorption and moisture content of both aggregates. The aggregates conform to the ASTM C33-84 requirements for grading. Estimate the quantity of (cement, fine aggregate, coarse aggregate and water) for 1m³ concrete.Consider two mixes, A and B. Mix A contains a well graded aggregate. Mix Bcontains an identically graded set of glass particles as aggregate. This glassparticle identical in size, shape and texture The mixes are inspected after 2 yearplacement. Explain condition of the mixes on the basis of: -Microstructure -Corrosion of embedded reinforcementWe require a mix with a mean 28-day compressive strength of 28 MPa. The slump is selected to be 40 mm. The maximum size of aggregate is 25 mm, its bulk density is 1570 kg/m3, and its specific gravity is 2.59. The available fine aggregate has a fineness modulus of 2.60 and a specific gravity of 2.62. No air entrainment is required. The cement relative density is 3.15. 1- Design the concrete mix according to ACI method satisfying the above requirements (find water, cement, fine and coarse aggregate masses (in kg/m³) and volumes (in m³) to form 1 m³ of concrete.).
- Define the following terms:a. Saturated surface-dry condition of aggregatesb. Absorption of aggregatesc. Free water on aggregatesd. Referring to Figure , which portion of the water in the aggregate reacts with the cement in the PCC mix?Concrete Mix Design-ACI Method The concrete will be non-air entrained since the structure is not exposed to severe weathering. Required average strength will be 24 MPa with slump of 75 to 100 mm. The coarse aggregate has a nominal maximum size of 37.5 mm and dry-rodded mass of 1600 kg/m. Other properties of the ingredients are: cement -- Type I with specific gravity of 3.15; coarse aggregate bulk specific gravity 2.68 and absorption 0.5 percent; fine aggregate-bulk specific gravity 2.64, absorption 0.7 percent, and fineness modulus 2.8.Q1: Prepare mix design for given data • The 28-day compressive strength should be 34 MPa, The slump should be between 75 mm and 100 mm and the maximum aggregate size should not exceed 19 mm The properties of the materials are as follows: • Cement : Type I, specific gravity = 3.15 • Coarse Aggregate: Bulk specific gravity= 2.65; absorption capacity = 0.5%; dry-rodded unit weight = 1605 kg/m3, surface moisture = 1% • Fine Aggregate: Bulk specific gravity= 2.60; absorption capacity = 1.1%; fineness modulus = 2.70; surface moisture = 3%