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Method for preparing concrete prefabricated slab

A technology for concrete and prefabricated panels, applied in the field of building construction, can solve the problems affecting the overall safety and service life of the building, low flexural strength, and high cost, improve corrosion resistance and penetration resistance, and improve tensile strength and resistance. The effect of bending strength, improving integrity and seismic performance

Pending Publication Date: 2018-02-23
杭州幽若科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of concrete prefabricated slabs, to solve the shortcomings of the existing concrete prefabricated slabs in the above-mentioned background technology, such as low bending strength and high brittleness, which lead to cracks or even fractures in the concrete during use , thereby seriously affecting the overall safety and service life of the building, and the preparation method is complicated and the cost is too high

Method used

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  • Method for preparing concrete prefabricated slab

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Effect test

Embodiment 1

[0023] The preparation method of concrete prefabricated slab comprises the following steps:

[0024] S1: Mixing raw materials: 58 parts of cement, 100 parts of fine sand, 190 parts of gravel, 8 parts of fly ash, 9 parts of water reducing agent, 16 parts of mixed flexible fiber, 3 parts of antifreeze, 3 parts of rust inhibitor, fireproof filler 10 parts and water are poured into the mixer and stirred. After stirring evenly, precast concrete is obtained. The stirring speed is 45 rpm, the stirring time is 12 minutes, and the stirring temperature is 15 minutes. The amount of water used is 0.6 times that of the solid mixture. , the fineness modulus of fine sand is 1.60, the apparent density is -2.68, and the density is 1.58 g / cm3, the stone is limestone, and the diameter of limestone is 1.5 cm, the apparent density is 2.8, and the density is 1.5 g / cm3, minus The water agent is a polyhydroxylate water reducer, the hybrid flexible fiber is a mixture of polypropylene mesh fiber and po...

Embodiment 2

[0029] The preparation method of concrete prefabricated slab comprises the following steps:

[0030] S1: Mixing of raw materials: 52 parts of cement, 102 parts of fine sand, 190 parts of gravel, 5 parts of fly ash, 10 parts of water reducing agent, 14 parts of mixed flexible fiber, 5 parts of antifreeze, 3 parts of rust inhibitor, fireproof filler 10 parts and water are poured into the mixer and stirred. After stirring evenly, precast concrete is obtained. The stirring speed is 30 rpm, the stirring time is 8 minutes, and the stirring temperature is 10 minutes. The amount of water is 0.5 times that of the solid mixture. , the fineness modulus of fine sand is 1.55, the apparent density is 2.65, and the density is 1.48 g / cm3, the stone is limestone, and the diameter of limestone is 0.8 cm, the apparent density is 2.6, and the density is 1.4 g / cm3 The agent is polyhydroxylate-based water reducing agent, the hybrid flexible fiber is a mixture of polypropylene mesh fiber and polyvin...

Embodiment 3

[0035] The preparation method of concrete prefabricated slab comprises the following steps:

[0036] S1: Mixing of raw materials: 55 parts of cement, 105 parts of fine sand, 200 parts of gravel, 7 parts of fly ash, 9 parts of water reducing agent, 15 parts of mixed flexible fiber, 2 parts of antifreeze, 2 parts of rust inhibitor, fireproof filler 12 parts and water are poured into the mixer and stirred. After stirring evenly, precast concrete is obtained. The stirring rate is 37 rpm, the stirring time is 10 minutes, and the stirring temperature is 13 minutes. The amount of water used is 0.55 times that of the solid mixture. , the fineness modulus of fine sand is 1.57, the apparent density is 2.67, and the density is 1.53 g / cubic centimeter, the stone is limestone, and the diameter of limestone is 1.2 cm, the apparent density is 2.7, and the density is 1.45 g / cubic cm. The agent is polyhydroxylate-based water reducing agent, the hybrid flexible fiber is a mixture of polypropyle...

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Abstract

The invention discloses a method for preparing a concrete prefabricated slab in the technical field of building construction. The method comprises the following steps: S1, mixing raw materials; S2, casting a mold, namely coating a release agent to the surface of the mold, pouring concrete in the step S1 into the mold, vibrating and compacting the concrete by adopting a vibration device, manually floating the concrete surface by adopting a float, and pressing and polishing the concrete surface; S3, maintaining; and S4, releasing the mold, releasing the mold and discharging after 6-8 hours of maintenance with steam. According to the method for preparing a concrete prefabricated slab, the tensile strength and bending strength of the concrete prefabricated slab can be greatly improved, the integral property and shock resistance of the structure can be effectively improved, the concrete prefabricated slab can be prevented from cracking, and the corrosion resistance and penetration resistance of the concrete prefabricated slab can be improved. The preparation method is simple in process and low in cost.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a method for preparing a concrete prefabricated slab. Background technique [0002] Prefabricated panels are the floor slabs used in early construction. It is the module or plate to be used in the project. Because it is directly transported to the construction site for installation after being processed in the factory, it is called prefabricated panel. When making prefabricated panels, first nail the hollow model with wooden boards. After distributing steel bars in the hollow part of the model, fill the hollow part with cement, knock off the wooden board after it dries, and the rest is the prefabricated board. Prefabricated panels have many uses in construction, such as the cement panels covered on the ditch next to the road; the cement panels used as the insulation layer on the roof are all prefabricated panels. The shortcomings of the existing concrete prefabri...

Claims

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Application Information

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IPC IPC(8): C04B28/00B28B1/04B28B1/093C04B111/34C04B111/20C04B111/27
CPCB28B1/045B28B1/093C04B28/00C04B2111/20C04B2111/27C04B2111/343C04B14/06C04B18/08C04B2103/302C04B14/28C04B16/0633C04B16/0641C04B14/18C04B14/304C04B2103/601C04B2103/61
Inventor 赵莉魏乃信
Owner 杭州幽若科技有限公司
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