Composite cement using carbide slag and fly ash as admixture
A technology for composite cement and fly ash, applied in the field of composite cement, can solve the problems of high fuel consumption and heat consumption, complex production process, increase production cost, etc., and achieve the effects of reducing heat consumption, simple production process and speeding up
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Embodiment 1
[0023] Using calcium carbide slag and fly ash as a mixture to prepare composite cement, the raw material formula is: 5% dry carbide slag, 20% fly ash, 10% slag, 60% Portland cement clinker, and 5% gypsum. .
[0024] Preparation steps:
[0025] 1) The calcium carbide slag is dried by drying equipment and crushed. After drying, the moisture content is less than 1wt%, and the particle size after crushing is less than 25mm.
[0026] 2) Weigh dry calcium carbide slag, fly ash, Portland cement clinker, slag, and gypsum according to the above formula, and add them to the mill to grind together until the cement fineness is 80 μm and the sieve residue < 10%. Composite cement is prepared.
[0027] 3) Determine the compressive strength and flexural strength of composite cement product samples at different hydration ages according to the national standard GB / T17671-1999, and determine the setting time and stability of composite cement product samples according to the national standard G...
Embodiment 2
[0029] Using calcium carbide slag and fly ash as a mixture to prepare composite cement, the raw material formula is: 10% dry carbide slag, 20% fly ash, 10% slag, 55% Portland cement clinker, and 5% gypsum. .
[0030] Preparation steps:
[0031] 1) The calcium carbide slag is dried by drying equipment and crushed. After drying, the moisture content is less than 1wt%, and the particle size after crushing is less than 25mm.
[0032] 2) Weigh dry calcium carbide slag, fly ash, Portland cement clinker, slag, and gypsum according to the above formula, and add them to the mill to grind together until the cement fineness is 80 μm and the sieve residue < 10%. Composite cement is prepared.
[0033] 3) Determine the compressive strength and flexural strength of composite cement product samples at different hydration ages according to the national standard GB / T17671-1999, and determine the setting time and stability of composite cement product samples according to the national standard ...
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