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Post-filling aggregate device and preparation process of post-filling aggregate concrete prefabricated component

A prefabricated component and preparation technology, which is applied in the field of concrete processing, can solve problems such as surface bleeding, aggregate sinking, and slurry floating, and achieve the effects of improving structural strength, reducing shrinkage, and stabilizing volume

Active Publication Date: 2020-05-15
GUANGDONG SANHE PILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages: After the concrete is vibrated, the aggregate sinks, the slurry floats up, and the surface bleeds
Disadvantages: (1) The aggregate is at the bottom and the concrete is in the middle. The slurry produced after vibration floats on the surface of the concrete, resulting in a "interlayer". The aggregate cannot be evenly mixed with the ordinary concrete slurry poured on the upper layer, which affects the compression resistance of the concrete components. , tensile and flexural capacity; (2) The quantity and position of preset aggregates cannot be accurately controlled, so it is suitable for large-scale construction machinery paving in large-scale projects such as road pavement, river embankments and dams.

Method used

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  • Post-filling aggregate device and preparation process of post-filling aggregate concrete prefabricated component
  • Post-filling aggregate device and preparation process of post-filling aggregate concrete prefabricated component
  • Post-filling aggregate device and preparation process of post-filling aggregate concrete prefabricated component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0052] Implementation case 1: Prestressed square pile production, the strength requirement is C60.

[0053] Cement: P II52.5 Admixture: Mineral powder S95 grade Sand: Manufactured sand, fineness modulus 3.0 Stone: 5-31.5mm continuous graded stone Water: Tap water Water reducing agent: High-performance polycarboxylic acid

[0054] Backfill aggregate: stone, 10-31.5mm gradation

[0055] Concrete mix design: water cement ratio: 0.32 sand rate: 39.8% slump: 180mm

[0056] cement mineral powder sand stone water Superplasticizer 330 120 760 1150 128 10.5

[0057] The prefabricated components are cured by steam: stop for 2 hours, heat up for 1 hour, and keep the temperature for 5 hours. The constant temperature is 80°C. Test the strength of the test block 3 days after it leaves the curing pond.

[0058] Postfill aggregate volume replacement rate (%) Strength (MPa) Strength ratio (%) 0 65.5 100 20 72.7 111 30 75.3 11...

Embodiment example 2

[0059] Implementation case 2: Production of non-prestressed concrete square piles, the strength requirement is C30.

[0060] Cement: P II52.5 Admixture: Fly ash Class II Sand: Manufactured sand, fineness modulus 3.0 Stone: 5-31.5mm continuous graded stones Water: Tap water Water reducing agent: High-performance polycarboxylic acid

[0061] Backfill aggregate: stone, 10-31.5mm gradation

[0062] Concrete mix design: water cement ratio: 0.45 sand ratio: 41.0% slump: 190mm

[0063] cement fly ash sand stone water Superplasticizer 270 100 752 1082 165 6.5

[0064] The prefabricated components are cured by steam: stop for 2 hours, heat up for 1 hour, and keep the temperature for 5 hours. The constant temperature is 80°C. 3 days after the strength of the maintenance pond was detected.

[0065] Postfill aggregate volume replacement rate (%) Strength (MPa) Strength ratio (%) 0 33.2 100 20 37.8 114 30 42.2 127

...

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Abstract

The invention discloses a post-filling aggregate device. The device comprises a frame body and a screen, a mounting surface and a working surface are arranged in the frame body, and the mounting surface is arranged parallel to the upper end surface of the frame body; and the screen comprises a plurality of first longitudinal steel bars, second longitudinal steel bars and transverse steel bars which are mounted in the frame body, wherein the plurality of first longitudinal steel bars are arranged on the mounting surface and are uniformly distributed in the length direction of the mounting surface. The position of the post-filling aggregate can be controlled through the post-filling aggregate device. The invention further discloses a preparation process of a post-filling aggregate concrete prefabricated component.

Description

technical field [0001] The invention relates to the technical field of concrete processing, in particular to a post-filling aggregate device and a preparation process for post-filling aggregate concrete prefabricated components. Background technique [0002] There are two existing methods of preparing concrete components: [0003] 1. Ordinary concrete: direct pouring of concrete. Disadvantages: After the concrete is vibrated, the aggregate sinks, the slurry floats up, and the surface bleeds. [0004] 2. Throwing aggregate concrete or pre-placed aggregate concrete: Before ordinary concrete is poured, a layer of aggregate is spread first, and ordinary concrete is poured on the upper layer of aggregate. Disadvantages: (1) The aggregate is at the bottom and the concrete is in the middle. The slurry produced after vibration floats on the surface of the concrete, resulting in a "interlayer". The aggregate cannot be evenly mixed with the ordinary concrete slurry poured on the upp...

Claims

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Application Information

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IPC IPC(8): B28B23/04B28B17/02B28B1/29B28B1/04B28B1/093C04B28/04
CPCB28B1/045B28B1/093B28B1/29B28B17/02B28B23/04C04B28/04C04B18/08C04B18/141C04B14/06C04B14/02C04B2103/302
Inventor 余晓文吴其群萧永森李龙滕耀华
Owner GUANGDONG SANHE PILE CO LTD
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