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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

Inactive Publication Date: 2020-06-12
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems existing in the prior art, the present invention provides a hybrid fiber-reinforced concrete prefabricated laminated slab and its preparation method to solve the problem of deformation of ordinary concrete laminated slabs in the prior art due to their poor strength and large spans , not conducive to construction

Method used

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  • Hybrid fiber concrete prefabricated laminated slab and preparation method thereof

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Effect test

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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Abstract

The invention discloses a hybrid fiber concrete prefabricated laminated slab and a preparation method thereof. The hybrid fiber concrete prefabricated laminated slab comprises a bottom plate fiber concrete layer, and a post-pouring layer is arranged on the bottom plate fiber concrete layer; the bottom fiber concrete layer comprises cement, fly ash, silica fume, sand, a water reducing agent, steelfibers, polyvinyl alcohol fibers and water; the post-pouring layer is formed by pouring common reinforced concrete; the hybrid concrete slab is arranged in the lower tension area, the advantages of high tensile strength and good ductility of the hybrid concrete are effectively played, the upper part is pressed by adopting the common reinforced concrete, and the characteristics of the two types ofconcrete are fully played; the steel fibers are doped into the hybrid fiber concrete so that the later strength and toughness of the concrete are effectively enhanced; the thickness of the laminated slab is reduced, the self-weight is reduced and the cost is saved, the manufacturing process is simple, and application and popularization are facilitated.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a hybrid fiber concrete prefabricated laminated board and a preparation method thereof. Background technique [0002] Large-scale infrastructure has very high requirements on the construction and durability of concrete. Since these projects are located in the wild and the construction conditions are harsh, the efficiency and continuity of the project schedule have become the most critical issues. Nowadays, labor costs are rising, skilled workers in concrete technology are becoming less and less, and traditional vibrating and compacting labor will cause noise disturbance to residents and may cause troubles. All these problems are expected to improve the performance of concrete. Bigger breakthrough. Relying on its own excellent construction performance, prefabricated laminated panels can be manufactured in batches and complete sets like industrial production, so as to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04B28B1/52B28B11/24B28B19/00B28C5/40E04B5/36
CPCC04B28/04B28C5/402B28B1/523B28B1/525B28B19/0092B28B11/245E04B5/36C04B18/146C04B18/08C04B14/06C04B2103/302C04B14/48C04B16/0641
Inventor 于婧梁兴文张辉翟天文
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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