A kind of self-compacting concrete and preparation method thereof
A self-compacting concrete and mixture technology, which is applied in the field of self-compacting concrete and its preparation, can solve problems such as poor compacting effect, and achieve the effects of good gap passage, good segregation resistance, and shrinkage relief
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Embodiment 1-3
[0018] Embodiment 1-3: a kind of self-compacting concrete, it is prepared by following method:
[0019] (1) mixing polycarboxylate high-performance water reducer with a small amount of water to obtain a mixture of polycarboxylate high-performance water reducer and water;
[0020] (2) Add water to cement, fly ash, and mineral powder to mix, then add acetonitrile and PAA aqueous solution, mix well, add medium sand with a fineness modulus of 3.0-2.3 and stone with a particle size of 15-20mm, mix ; Then add the mixture of polycarboxylate high-performance water reducer and water that step (1) obtains, mix homogeneously;
[0021] In step (2), in terms of parts by mass, the consumption ratio of cement and acetonitrile is 100: 2; in adding the mixture of sand, stone, polycarboxylate high-performance water reducer and water and the subsequent mixing process, acetonitrile gradually Volatile.
[0022] The formula of embodiment 1-3 is as shown in table 1.
[0023] The formula of table ...
Embodiment 4
[0025] Embodiment 4: A kind of self-compacting concrete, the difference with embodiment 2 is that in step (2), after adding water in the crushed cement, fly ash, ore powder, no acetonitrile is added.
Embodiment 5
[0026] Embodiment 5: a kind of self-compacting concrete, the difference with embodiment 2 is, in step (2), after adding water in the cement after pulverizing, fly ash, slag, the acetonitrile amount that adds is cement's 5wt%.
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