Hybrid fiber concrete prefabricated laminated slab and preparation method thereof
A technology of fiber concrete and fiber concrete layer, which is applied in the field of hybrid fiber concrete prefabricated laminated slabs and its preparation, can solve problems such as unfavorable construction, deformation, and poor strength, and achieve the goal of reducing cement consumption, improving durability, and good compatibility Effect
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Embodiment 1
[0048] Embodiment 1 of the present invention provides a prefabricated composite slab of hybrid fiber concrete, comprising a base plate fiber concrete layer 1, on which a post-casting layer 2 is arranged; the thickness of the base plate fiber concrete layer 1 is 11.2mm, and the upper concrete layer The thickness of 2 is 71.2mm; the bottom fiber concrete layer 1 includes cement, fly ash, silica fume, sand, water reducer, steel fiber, polyvinyl alcohol fiber and water; The reinforced concrete is provided with structural steel bars, and the structural steel bars are HRB400MPa steel bars with a diameter of 6mm.
[0049] 1. Raw materials
[0050] 1. Cement
[0051] 42.5 ordinary Portland cement with stable quality and good performance is used, and the specific surface area is 350-400m 2 / ㎏; initial setting time is 180min, final setting time is 255min; 28-day compressive strength is 46-57MPa, 28-day flexural strength is 8.2-9.2MPa.
[0052] 2. Silica fume
[0053] SF93 silica fum...
Embodiment 2
[0077] The raw materials and preparation process of embodiment 2 and embodiment 1 are basically the same, the difference is that the thickness of bottom plate fiber concrete layer 1 in embodiment 2 is 10mm, and the thickness of upper concrete layer 2 is 70mm; Ratio preparation: the weight ratio of cement: water: fly ash: silica fume: sand: water reducer: steel fiber: polyvinyl alcohol = 670:180:165:110:1140:24:115:2.8.
Embodiment 3
[0079] The raw materials and preparation process of embodiment 3 and embodiment 1 are basically the same, the difference is that the thickness of bottom plate fiber concrete layer 1 in embodiment 3 is 12mm, and the thickness of upper concrete layer 2 is 72mm; Ratio preparation: cement: water: fly ash: silica fume: sand: water reducing agent: steel fiber: polyvinyl alcohol, the weight ratio is 718:194:180:120:1180:26:124:3.2.
[0080] The 2200×2000mm bottom fiber concrete layer with a thickness of 10mm prepared by the preparation method of a hybrid fiber concrete prefabricated laminated slab described in Example 1-3 adopts the method of uniformly distributed load to arrange the live load. Under the condition that both the bearing and the support are in an elastic state, the load that can be loaded on the slab surface can reach 5.078-6.014KN / m 2 ;According to the safety technical specifications for building construction formwork, when calculating panels and girders, the standard v...
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