Silica fume in cement concrete strength and activity index test

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Silica fume in cement concrete strength and activity index test

1. Activity index test

Raw materials (g) Control ratio Test match ratio
No. 525 Silicate Cement 540 486
Silica fume 0 54
Soft standard sand 1350 1350
Water 210 225
Mortar flow (mm) 111-113 113-118
Flexural strength (mpa) 10.21 11.46
28-day activity index Compressive strength (mpa) 76.1 83.8
Folding 112
Compression 110

2. Silica fume in cement concrete strength test

Raw materials (g) 1 2 3
Cement 488.9 499.8 440.0
Silica fume 0 39.1 48.9
Water 127.0 127.11 127.11
Sand 621.7 621.7 621.7
Stone 1262.3 1262.3 1262.3
Maximum material size (mm) 20 20 20
Water-cement ratio 0.26 0.26 0.26
Silica fume dosage (%) 0 8 10
Water reducer dosage (%) 1.0 1.0 1.0
Compressive strength (7 days) 62.2 68.9 69.6
28 days 79.1 90.0 91.0

Note: The above data is for reference only