A commercial laundry is considering constructing an ion exchange process to remove hardness from the water. The flow required is 1000 m³/day and they use city water which contains 200 mg/l as CaCO3 of calcium and 100 mg/l as CACO3 of magnesium. Total hardness should be reduced to 80 mg/l as CaCO3. The resin has a Total Hardness (TH) capacity of 60 kg TH/m³ of media and the recommended hydraulic loading rate is 0.5 m³/min-m². (a) What is the water flow rate (m³/d) that need to be treated ? (b) What is the total daily resin volume (m³) required to soften the water? And (c) What is the area of

A commercial laundry is considering constructing an ion exchange process to remove hardness from the water. The flow required is 1000 m³/day and they use city water which contains 200 mg/l as CaCO3 of calcium and 100 mg/l as CACO3 of magnesium. Total hardness should be reduced to 80 mg/l as CaCO3. The resin has a Total Hardness (TH) capacity of 60 kg TH/m³ of media and the recommended hydraulic loading rate is 0.5 m³/min-m². (a) What is the water flow rate (m³/d) that need to be treated ? (b) What is the total daily resin volume (m³) required to soften the water? And (c) What is the area of

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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(14) IfC 400 kg/m: W 200 kg/m: Air content 4% and CA (SSD) = 840 kg/m. Using the volume method, the weight of fine aggregate (SSD) (kg/m) is (a) 855 (b) 890 (c) 794 (d) 870 (e) 750
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Second Section The composition of a certain brand of cement is given (C3S = 53.0%, C2S = 18.0%, C3A=12.0% and C4AF = 8.0%) the type of cement is * Sulphate resisting cement Rapid hardening cement Ordinary Portland cement Low heat cement For the If the chemical composition of cement is as follows (CaO=60%, SIO2 =25.6%, AI203= 3.8%, MgO=4%, SO3=2.1%, C4AF=13.7%) the type of cement is * White cement None of the above Expansive cement Pozzolanic cement
Highways Engineering Example2: Determine percentages air voids and voids filled with binder to obtain a unit weight value for the mix of 2.349 g/cm3, given that: % of coarse aggregate 54%, Gc=2.64 % of fine aggregate = 40%, Gf=2.66 % of mineral filler = 6%, Gmf=2.85 % of biner content by the total weight of the mix= 5.3%, Gb=1.02
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2) Two aggregates (Al and A2) were obtained from the field. They were brought to the oven dry condition (OD) and weighed. Data for each of the aggregates is presented in the table below. (Density of water=lg/cm³) Table 1. Absorption capacity and moisture content data. A1 A2 600 g 600 g Field Weight Oven Dry Weight Absorption Capacity (%) | 0.6 % 595.3 g 598.3 g 0.7 % a) Describe the field moisture state of each aggregate, Al and A2 (i.e. wet, SSD, or air dry). For each sample would you add water or dry the sample to bring it to SSD state? Determine the expected mass of each sample in the SSD state. b) If the bulk volume Al oven dry is 220 cm³ and the bulk volume of A2 oven dry is 250 cm³, determine the bulk oven dry specific gravity for each aggregate, Al and A2.
1. Calculate the following properties for the data provided in the Table below for a coarse aggregate sample. a. Bulk SSD specific gravity b. Bulk Dry specific gravity A Bulk Dry Sp. Gr. = c. Apparent specific gravity d. Absorption capacity. В — С B Bulk SSD Sp. Gr. = В — С where A Apparent Sp. Gr. = А — С A = dry weight B = SSD weight C = submerged weight В — А (100) A Absorption (%) Weight of Pan + Oven- Dry Aggregate Weight of Pan Weight of Submerged Aggregate Weight of Pan + SD Aggregate 0.8495 Ib 1.9885 lb 0.6870 lb 1.9630 Ib 2. If the Moisture Content of a stockpile sample of the same coarse aggregates is 1.85 %, what is the moisture state of aggregate sample? Select from the four standard moisture states. Explain how you arrived at the answer. 3. If Bulk unit weight of coarse aggerates is 98 Ib/ft³determine the % Voids of dry-rodded aggregate. Youlk S.G(Bulk Dry)*Pwater %Solids * 100 4. Determine the % solids for 2 cases discussed in pre-lab video by using below data.…
Q-5) Answer (True) or (false) and correct if (false). 1. C,S need more than twice amount of water from C,S to hydration. 2. Calcareous material as a source of silica and alumina in manufacture of Portland cement. 3. Rough surfaces of aggregate improve mechanical bond. 4. Saturated surface dry condition (SSD) of aggregate means all internal pores are saturated with water and its surface wet. 5. Iraqi specification No. 5 limited Sulfur oxide in the cement as max. by 2.8% when C3A > 5%.
4. Lime and soda process is to be designed for the water analysis presented below, The quantity of water to be treated is 12 MGD. Estimate the total hardness, carbonate hardness and non-carbonate hardness. Determine the amount of lime and soda to soften the water to a final hardness of 95 moA as CaCO, Estimate the annual cost of softening if the cost of dry lime (CaO) is a dime per kilogram and cost of soda ash (Na-CO,) is 20 cents per kilogram (assume both compounds to be 90% pure). (AW: Ca-40, Mg-24.3, Na-23, C-12,0-16) acl Constituent mgl mg/las C&CO, Ca 12 Alkalinity CO2 150 Show transcribed image text
(a) Discuss the importance of these products in the hydration process: i) C-S-H gel ii) Ca(OH)2 (b) Approximately 70% of concrete is made up from aggregates. Some stated that aggregates are only an inert material in concrete and have negligible effects on concrete. Based on your understanding, discuss whether you agree or disagree the above statement with justifications. (c) Explain why concreting works in the rain is prohibited during construction. Give two (2) consequences resulting from this practice from the point of view of excessive water in concrete mix.
PV laundry facility uses 1 m/min and wants to design an exchange process to remove hardness from the water. The municipal water that they use contains 80 mg/L of calcium and 36.6 mg/L of Magnesium. Total hardness should be reduced to 80 mg/L of CaCO3. The resin has a Total Hardness (TH) capacity of 60 kg TH/m³ of resin, and the recommended hydraulic loading rate is 0.5 m³/m².min. a) What is the water flow rate (m³/d) that needs to be treated? b) What is the total daily resin volume (m³) required to soften the water? c) What is the area of the exchanger needed?