A kind of preparation method of 2m long light weight prefabricated concrete U-shaped channel

A technology of precast concrete and light concrete is applied in the field of preparation of 2m long light precast concrete U-shaped channels, which can solve the problems of low compressive strength of precast concrete U-shaped channels, only fixed-point production, and poor frost resistance, etc. Increased or reduced yield, less air bubbles, reduced noise pollution

Inactive Publication Date: 2016-06-15
HEILONGJIANG PROVINCIAL HYDRAULIC RES INST
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Problems solved by technology

[0005] The purpose of the present invention is to provide a 2m long light precast concrete U-shaped channel in order to solve the problems of low compressive strength, poor frost resistance, serious noise pollution and fixed-point production of the precast concrete U-shaped channel obtained by the existing preparation method. Preparation method of type channel

Method used

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  • A kind of preparation method of 2m long light weight prefabricated concrete U-shaped channel
  • A kind of preparation method of 2m long light weight prefabricated concrete U-shaped channel

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specific Embodiment approach 1

[0017] Specific embodiment one: the preparation method of a kind of 2m long light prefabricated concrete U-shaped channel of this embodiment is realized according to the following steps:

[0018] 1. Weigh 37%-40% gravel, 33%-35% sand, 13%-15% cement, 5%-6% fly ash, 2%-2.5% mineral powder, 0.2%-0.3% Silicon powder, 0.4%-0.5% admixture, 0.2%-0.3% steel fiber and 7%-8% water are used as raw materials;

[0019] 2. Add the raw materials weighed in step 1 into the mixer, stir for 2 minutes and pour directly into the U-shaped channel mold placed on the level ground to obtain a formed 2m long light concrete U-shaped channel;

[0020] 3. Transport the U-shaped channel mold carrying the formed 2m-long light concrete U-shaped channel to the curing site, put it into a closed curing space, and inject steam into the closed curing space for curing. The curing process is: first Stop at room temperature for 4 hours, and then pass in steam for 6 hours, in which the temperature in the curing sp...

specific Embodiment approach 2

[0028] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the label of the cement described in step one is PO425. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0029] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the grade of the fly ash mentioned in step 1 is Grade I. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a preparation method of a 2-meter lightweight prefabricate concrete U-shaped channel, and aims to solve the problems that the prefabricated concrete U-shaped channel produced by the conventional preparation method has the disadvantages of low compression strength and bad freezing-resistant property, moreover, the conventional preparation method generates severe noise pollution and can only produce channels in a fixed position. The preparation method comprises the following steps: (1) preparing raw materials; (2) evenly mixing and blending raw materials, casting the mixture into a U-shaped channel mould placed on a flat ground so as to obtain a molded U-shaped channel; (3) transporting the U-shaped channel mould containing the molded U-shaped channel to a maintenance field to carry out a maintenance treatment; (4) carrying out a demoulding treatment on the U-shaped channel which has been subjected to the maintenance treatment so as to obtain a finished product. Active powder is used to self-compact the concrete, the raw materials can automatically fulfill the mould, and thus the stirring and blending are not needed, so the noise pollution during the production process is avoided. Furthermore, the produced channel has the advantages of smooth surface, few bubbles, and no honeycomb or hole. The preparation method is used to prepare 2-meter lightweight prefabricated concrete U-shaped channel.

Description

technical field [0001] The invention relates to a preparation method of a 2m-long light-duty prefabricated concrete U-shaped channel. Background technique [0002] With 6% of the world's fresh water resources and 9% of the arable land, China has solved the problem of feeding 21% of the world's population, and farmland water conservancy has played a vital role. [0003] In recent years, the central government has insisted on taking the construction of farmland water conservancy as an important basis for ensuring the stable development of agriculture and national food security, continuously improving the policy support system, and intensifying various efforts to promote farmland water conservancy into a new stage of development. In 2012, the "Water Conservation and Grain Increase Action" was launched in the four northeastern provinces and regions, but the "last mile" from the branch canal to the field is the weakest link in farmland water conservancy, and there are common prob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
Inventor 陶琦卢健刘丽佳孙景路张滨司振江李芳花
Owner HEILONGJIANG PROVINCIAL HYDRAULIC RES INST
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