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Masonry Systems - Theory & Concepts - Materials Mortar Flow

Concrete Hollow Blocks (CHB), mortar, grout, and structural masonry design.

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Mortar Flow Table Test

Simulate the ASTM C1437 flow table test. Adjust mortar type and w/c ratio, then trigger table drops to spread the mortar.

Water-Cement Ratio (w/c)0.55
Standard drops: ASTM C1437 specifies dropping the table 25 times in 15 seconds. Standard flow range is typically $100\%$ to $115\%$.

Flow Table Surface

Concentric circles on the flow table showing mortar expansionSSD Base (100mm)150% Flow
Final Diameter: 100 mm
ASTM C1437 Flow %
Flow %=Dfinal−DinitialDinitial×100\text{Flow \%} = \frac{D_{final} - D_{initial}}{D_{initial}} \times 100
Flow=100−100100×100=0%\text{Flow} = \frac{100 - 100}{100} \times 100 = 0\%
Predicted Mortar Strength
4.7 MPa
Too Stiff (Poor workability)

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