d. Referring to Figure 5.9, which portion of the water in the aggregate reacts with the cement in the PCC mix? 188Chapter 5 AggregatesPermeablevoid-Moisture-ImpermeablevoidsSolid(a)(b)(c)(d)FIGURE 5.9 Voids and moisture absorption of aggregates: (a) bone dry, (b) airdry, (c) saturated surface-dry (SSD), and (d) moist.no specific level of aggregate absorption that is desirable for aggregates used in port-land cement concrete, but aggregate absorption must be evaluated to determine theappropriate amount of water to mix into the concrete.Absorption is also important for asphalt concrete, since absorbed asphalt isnot available to act as a binder. Thus, highly absorptive aggregates require greateramounts of asphalt binder, making the mix less economical. On the other hand,some asphalt absorption is desired to promote bonding between the asphalt and theaggregate. Therefore, low-absorption aggregates are desirable for asphalt concrete.Figure 5.9 demonstrates the four moisture condition states for an aggregate par-ticle. Bone dry means that the aggregate contains no moisture; this requires dryingthe aggregate in an oven to a constant mass. In an air dry condition, the aggregatemay have some moisture but the saturation state is not quantified. In a saturated sur-face-dry (SSD) condition, the aggregate's voids are filled with moisture but the mainsurface area of the aggregate particles is dry. Absorption is defined as the moisturecontent in the SSD condition. Moist aggregates have moisture content in excess ofthe SSD condition. Free moisture is the moisture content in the aggregate in excessof the moisture content in the SSD condition.The percent moisture content (MC) in the aggregate can be calculated asWary100WuoistMC(5.1)WarywhereWmoistWary = weight of dry aggregateweight of moist aggregate

Permeable void: The volume of voids that are emptied during the specific drying is known as…

Answered: d. Referring to Figure 5.9, which…

Engineering

Civil Engineering

d. Referring to Figure 5.9, which portion of the water in the aggregate reacts with the cement in the PCC mix?

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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