Aggregate Content
Aggregate Content - Related Videos
01:10
Moisture Content and Bulking of Aggregate
0 Views •
2024
The moisture content of aggregates is a crucial factor in construction, particularly in concrete mixing, as it influences the total water required in the mix. Moisture content represents the water coated on the exterior surface of the aggregate existing in a saturated and surface-dry condition. The total water content of a moist aggregate is the sum of its moisture content and water absorption. When aggregates are exposed to rain or sit in stockpiles, they absorb moisture, which must be...
10:10
Aggregates for Concrete and Asphaltic Mixes
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2023
Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA Concrete and asphalt are by far the most common construction materials used today. Concrete is a composite material consisting of cement, water, air, coarse aggregate, and fine aggregates. Fine aggregates are typically sands and coarse aggregates are natural or crushed rocks. Chemical admixtures to modify certain specific properties are also commonly used (i.e., superplasticizers to make the...
06:16
Determination of Moisture Content in Soil
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2023
Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - The University of Arizona Demonstrating Author: Bradley Schmitz Soils normally contain a finite amount of water, which can be expressed as the “soil moisture content.” This moisture exists within the pore spaces in between soil aggregates (inter-aggregate pore space) and within soil aggregates (intra-aggregate pore space) (Figure 1). Normally this pore space is occupied by air and/or water. If all the pores are occupied by air, the...
11:12
Assay Development for High Content Quantification of Sod1 Mutant Protein Aggregate Formation in Living Cells
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Cited by 1 •
2017
We describe a method to quantify the aggregation of misfolded proteins. Our protocol details lentiviral induced stable cell line generation, automated confocal imaging, and image analysis of protein aggregates. As an illustrative application, we studied the effect of small molecules in promoting SOD1 aggregation in a time- and dose-dependent manner.
07:04
Determination of the Glycogen Content in Cyanobacteria
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Cited by 25 •
2017
Here, we present a reliable and easy assay to measure the glycogen content in cyanobacterial cells. The procedure entails precipitation, selectable depolymerization, and the detection of glucose residues. This method is suitable for both wildtype and genetically engineered strains and can facilitate the metabolic engineering of cyanobacteria.
FAQs
Aggregate content affects how particles occupy available volume and contact one another within the mixture. A suitable quantity and size distribution can reduce unfilled space, while an unsuitable arrangement may increase void content. These packing effects influence density, binder requirements, workability, and the continuity of load transfer through the hardened composite.
Size distribution determines how different particle sizes arrange within the mixture. Engineers adjust this distribution because the resulting packing pattern affects the amount of empty space between particles. Controlling void content helps balance density, workability, strength, and material efficiency, making size distribution a central consideration in aggregate content decisions.
Changes in aggregate content can influence workability, density, load transfer, strength, durability, and dimensional stability. These effects are interconnected: particle arrangement affects void content and volume distribution, while the overall mixture composition affects how the binder and granular phase perform together. Engineers therefore evaluate aggregate content as a system-level mix-design variable rather than an isolated quantity.
Engineers adjust the quantity and proportion of granular material together with its size distribution during mix design. They use these changes to balance performance requirements such as strength, durability, dimensional stability, cost, and constructability. The selected combination must also provide appropriate particle packing and void content for the intended engineered mixture.
The same design principle applies to concrete and other engineered composite materials that combine granular particles with a binder. In each case, aggregate content helps determine how volume is occupied and how particles interact within the mixture. This makes the concept relevant wherever engineers must coordinate material performance, efficient composition, and reliable construction.
Appropriate aggregate content allows engineers to coordinate performance with practical construction demands. By controlling particle packing, void content, density, workability, and load transfer, they can pursue mixtures that meet strength and durability needs while also addressing cost and constructability. These design choices support consistent material behavior and more efficient use of the mixture's components.