A saturated aggregate sample with an absolute volume of 5.05x10^-5 m^3 hasa mass of 178 g before drying and 139 g after drying in an oven. Assume thewater absorption by volume to be 59.18%. Determine the following:a. Specific gravity of the solid particlesb. Mass specific gravityc. Void Ratiod. Porosity

Given Absolute Volume V = 5.05 × 10-5 m3 Bulk Mass or Saturated Mass M = 178g Dry Mass Md = 139g…

Answered: A saturated aggregate sample with an…

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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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.
(d) Ca(HCO3)2 = 150 mg/L; Mg(HCO3)2 = 200 mg/L; CaSO4 = 180 mg/L; MgCl2 = 95 mg/L; CaCl2 = 137 mg/L; turbidity = 15 mg/L; NaCl = 58.5 mg/L. Calculate: (i) Carbonate and non-carbonate hardness in degree Clark. (ii) The cost of limesoda process, if lime (95% pure) is Rs.200/10 Kg and soda (86%pure) is Rs. 400/10 Kg for softening of 150,000 liters of hard water using Al2(SO4)3 as a coagulant @ 28.5 mg/L. (iii) A hard water sample having 530 ppm CaCO3 equivalent hardness was completely softened on passing over a zeolite bed. The exhausted bed was subsequently regenerated using 75 liters of 45 percent brine solution. Calculate the quantity of hard water that has been softened using zeolite softener.
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%.
When a pressure of 650 psi is applied to a solid, its specific weight increases from 310 lb>ft3 to 312 lb>ft3. Determine the approximate bulk modulus.
The objective of the consolidation step is to achieve maximum particle packing and uniformity, so that minimum shrinkage and retained porosity will result during densification. Uniform particle size does not produce good packing. Adding particles of a size equivalent to the smallest voids reduces the pore volume to how much? O a. 23% O b. 52% О с. O d. 12% 40%
Calculation: Mmoist - Maryx 100% MC = : Mary Where: MC = moisture content in percent Mmoist = mass of original specimen Måry = mass of oven dry specimen Tabulated Data and Result Sample No. Mmoist (kg) Mdry (kg) MC 1 0.5 0.25 0.4 0.18 3 0.5 0.22 4 0.3 0.13

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