The National Academies Press

Currently Skimming:

Pages 20-41

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.

From page 20... ... 20 This chapter first verifies the accuracy and repeatability of the FTI results by comparing the dimension results using FTI results by different operators to manual measurements of the particles with standard shapes, such as triangular prism, circulate plate, and lens. After that, there are two sets of coarse aggregates, including seven types of aggregates in Aggregate Set 1 (hereinafter referred to as Set 1) Read the entire page →
From page 21... ... 21 reconstruction and computation errors during MATLAB program analysis of data acquired from the FTI system. 4.2 FTI Results of Coarse Aggregates in Set 1 In Set 1, seven types of coarse aggregate with sizes ranging from ¾ in. Read the entire page →
From page 22... ... 22 morphological parameters presented are sphericity, flatness ratio, elongation ratio, angularity, and texture. Each mean value of the morphological parameter in this table represents the mean value of the 30 aggregate particles of each type of aggregate within a specific size range. Read the entire page →
From page 23... ... 23 Figure 4-2. Circular plate particle, imaged in the FTI system. Read the entire page →
From page 24... ... 24 (a) Visual image (b) Read the entire page →
From page 25... ... 25 Aggregate Type Origin Lithographic Description LAA Loss (%) Read the entire page →
From page 26... ... 26 0.6 0.7 0.8 0.9 1.0 0 5 10 15 20 25 30 35 40 1E-7 1E-5 1E-3 Sphericity Flatness ratio Elongation ratio M ea n sh ap e fa ct or Angularity Texture M ea n an gu la rit y & te xt ur e Number of 3/4'' aggregate particles evaluated Figure 4-5. Asymptotic analysis to determine required sample size for ¾-in. Read the entire page →
From page 27... ... 27 Sphericity Flatness ratio Elongation ratio Angularity Texture 0.6 0.7 0.8 0.9 1.0 0 5 10 15 20 25 30 35 40 1E-7 1E-5 1E-3 M ea n sh ap e fa ct or M ea n an gu la rit y & te xt ur e Number of 3/8'' aggregate particles evaluated Figure 4-7. Asymptotic analysis to determine required sample size for 3⁄8-in. Read the entire page →
From page 28... ... 28 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 20 40 60 80 100 3/4'' Aggregates Blast Furnace Slag Copper Ore Dolomite Glacial Gravel Crushed Glacial Gravel Rounded Iron Ore LimestoneC um ul at iv e pe rc en ta ge o f ag gr eg at es ( % ) FTI Sphericity Figure 4-9. Read the entire page →
From page 29... ... 29 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 20 40 60 80 100 1/2'' Aggregates Blast Furnace Slag Copper Ore Dolomite Glacial Gravel Crushed Glacial Gravel Rounded Iron Ore LimestoneC um ul at iv e pe rc en ta ge o f ag gr eg at es ( % ) FTI Sphericity Figure 4-10. Read the entire page →
From page 30... ... 30 0.0 0.2 0.4 0.6 0.8 1.0 0 20 40 60 80 100 C um ul at iv e pe rc en ta ge o f ag gr eg at es ( % ) FTI Flatness ratio 3/4'' Aggregates Blast Furnace Slag Copper Ore Dolomite Glacial Gravel Crushed Glacial Gravel Rounded Iron Ore Limestone Figure 4-13. Read the entire page →
From page 31... ... 31 0.0 0.2 0.4 0.6 0.8 1.0 0 20 40 60 80 100 C um ul at iv e pe rc en ta ge o f ag gr eg at es ( % ) FTI Elongation ratio 3/4'' Aggregates Blast Furnace Slag Copper Ore Dolomite Glacial Gravel Crushed Glacial Gravel Rounded Iron Ore Limestone Figure 4-17. Read the entire page →
From page 32... ... 32 1E-7 1E-6 1E-5 1E-31E-4 0.01 0 20 40 60 80 100 1/2'' Aggregates Blast Furnace Slag Copper Ore Dolomite Glacial Gravel Crushed Glacial Gravel Rounded Iron Ore LimestoneC um ul at iv e pe rc en ta ge o f ag gr eg at es ( % ) FTI Angularity Figure 4-22. Read the entire page →
From page 33... ... 33 1E-7 1E-6 1E-5 1E-31E-4 0.01 0 20 40 60 80 100 3/8'' Aggregates Blast Furnace Slag Copper Ore Dolomite Glacial Gravel Crushed Glacial Gravel Rounded Iron Ore LimestoneC um ul at iv e pe rc en ta ge o f ag gr eg at es ( % ) FTI Angularity Figure 4-23. Read the entire page →
From page 34... ... 34 1E-7 1E-61E-8 1E-5 1E-4 0 20 40 60 80 100 3/8'' Aggregates Blast Furnace Slag Copper Ore Dolomite Glacial Gravel Crushed Glacial Gravel Rounded Iron Ore LimestoneC um ul at iv e pe rc en ta ge o f ag gr eg at es ( % ) FTI Texture Figure 4-27. Read the entire page →
From page 35... ... 35 1E-7 1E-6 1E-5 1E-31E-4 0.01 0 20 40 60 80 100 #4 Aggregates Blast Furnace Slag Copper Ore Dolomite Glacial Gravel Crushed Glacial Gravel Rounded Iron Ore LimestoneC um ul at iv e pe rc en ta ge o f ag gr eg at es ( % ) FTI Texture Figure 4-28. Read the entire page →
From page 36... ... 36 Aggregate Source Aggregate Description Aggregate Size Maymead Granite Non-carbonate 3/4"–1/2" Salem Quartzite Broadway Dolomite Carbonate Strasburg Limestone Table 4-8. Types of aggregates in Set 2. Read the entire page →
From page 37... ... 37 Figure 4-30. The mean value of FTI angularity and texture of Strasburg in the 65% confidence interval of FTI angularity and texture for limestone ½-in. Read the entire page →
From page 38... ... 38 45 min of Micro-Deval Broadway Maymead Salem Strasburg 1E-7 1E-6 1E-5 1E-31E-4 0.01 0 20 40 60 80 100 Cu m ul at iv e pe rc en ta ge o f a gg re ga te s ( %) FTI Angularity Figure 4-33. Read the entire page →
From page 39... ... 39 Figure 4-37. Crushed gravel (Montgomery, AL) Read the entire page →
From page 40... ... 40 Figure 4-40. Glacial gravel sand #50, imaged in the FTI system. Read the entire page →
From page 41... ... 41 (a) Visual image (b) Read the entire page →

From page 20...

... 20 This chapter first verifies the accuracy and repeatability of the FTI results by comparing the dimension results using FTI results by different operators to manual measurements of the particles with standard shapes, such as triangular prism, circulate plate, and lens. After that, there are two sets of coarse aggregates, including seven types of aggregates in Aggregate Set 1 (hereinafter referred to as Set 1)