Low-temperature-difference mass concrete suitable for articulated chute construction and preparation process of low-temperature-difference mass concrete

A large-volume concrete and low-temperature technology, applied in the field of high-performance concrete, can solve the problems of large ground drop in the working surface, long chute delivery distance, small chute inclination angle, etc., to reduce the amount of cement, delay the hydration reaction, and connect holes Reduced effect

Active Publication Date: 2020-12-25
陕西秦汉恒盛新型建材科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the raft construction of super high-rise buildings generally has problems such as the long delivery distance of the chute, the small inclination angle of the chute, and the large drop between the working surface and the ground due to the narrow construction site and the deep foundation pit. Bone separation, which puts forward higher requirements for the workability and constructability of concrete

Method used

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  • Low-temperature-difference mass concrete suitable for articulated chute construction and preparation process of low-temperature-difference mass concrete
  • Low-temperature-difference mass concrete suitable for articulated chute construction and preparation process of low-temperature-difference mass concrete
  • Low-temperature-difference mass concrete suitable for articulated chute construction and preparation process of low-temperature-difference mass concrete

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Effect test

Embodiment 1

[0025] The low-temperature-difference large-volume concrete suitable for chute construction in this embodiment is prepared from the following components by mass: 180 parts of cement, 320 parts of mineral powder, 120 parts of fly ash, 100 parts of water, and 1000 parts of crushed stone , 750 parts of sand, 10 parts of pumping agent.

[0026] The preparation process of the low-temperature-difference mass concrete applicable to the slide pipe construction of the present embodiment comprises the following steps:

[0027] Step 1. Uniformly mix 750 parts of sand, 1000 parts of gravel and 100 parts of water to obtain a mixture; the temperature of the water is 0°C to 10°C;

[0028] Step 2: Add 180 parts of cement, 120 parts of fly ash, 320 parts of mineral powder and 10 parts of pumping agent to the mixture obtained in step 1 and stir evenly for 120 seconds to obtain concrete.

Embodiment 2

[0030] The low-temperature-difference large-volume concrete suitable for chute construction in this embodiment is prepared from the following components by mass: 200 parts of cement, 300 parts of mineral powder, 80 parts of fly ash, 150 parts of water, and 1200 parts of gravel , 700 parts of sand, 15 parts of pumping agent.

[0031] The preparation process of the low-temperature-difference mass concrete applicable to the slide pipe construction of the present embodiment comprises the following steps:

[0032] Step 1. Uniformly mix 700 parts of sand, 1200 parts of gravel and 150 parts of water to obtain a mixture; the temperature of the water is 0°C to 10°C;

[0033] Step 2: Add 200 parts of cement, 80 parts of fly ash, 300 parts of mineral powder and 15 parts of pumping agent to the mixture obtained in step 1 and stir evenly for 120 seconds to obtain concrete.

Embodiment 3

[0035] The low-temperature-difference large-volume concrete suitable for slide pipe construction in this embodiment is prepared from the following components by mass: 150 parts of cement, 260 parts of mineral powder, 110 parts of fly ash, 110 parts of water, and 900 parts of gravel , 800 parts of sand, 14 parts of pumping agent.

[0036]The preparation process of the low-temperature-difference mass concrete applicable to the slide pipe construction of the present embodiment comprises the following steps:

[0037] Step 1, uniformly mix 800 parts of sand, 900 parts of crushed stone and 110 parts of water to obtain a mixture; the temperature of the water is 0°C to 10°C;

[0038] Step 2: Add 150 parts of cement, 110 parts of fly ash, 260 parts of mineral powder and 14 parts of pumping agent to the mixture obtained in step 1 and stir evenly for 120 seconds to obtain concrete.

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Abstract

The invention discloses low-temperature-difference mass concrete suitable for articulated chute construction. The low-temperature-difference mass concrete is prepared from the following components inparts by mass: 150-200 parts of cement, 260-320 parts of mineral powder, 80-120 parts of fly ash, 100-150 parts of water, 900-1200 parts of gravels, 700-800 parts of sand and 8-20 parts of a pumping agent. The invention further discloses a process for preparing the low-temperature-difference mass concrete suitable for articulated chute construction. The sand, gravels and water are evenly mixed, then the cement, the fly ash, the mineral powder and the pumping agent are added, and the mixture is evenly stirred. The fly ash and the mineral powder are adopted, the hydration heat of the cement is reduced, the temperature difference between the inside and the outside of the mass concrete is reduced, the segregation resistance of the mass concrete is improved, and the strength and the working performance of the mass concrete are ensured, so that shrinkage deformation and slurry-bone separation of the mass concrete are reduced, and the mass concrete is suitable for articulated chute construction; the preparation process is simple and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of high-performance concrete, and in particular relates to a low-temperature-difference large-volume concrete suitable for chute construction and a preparation process thereof. Background technique [0002] With the rapid development of social economy, it is more and more common to use large-volume concrete in modern construction projects such as high-rise buildings, water conservancy projects, and large-scale equipment. The characteristics of large-volume concrete are large volume and internal temperature rise. The release of cement hydration heat is relatively concentrated, and when the temperature difference between inside and outside is large, it is easy to cause temperature cracks. Such cracks will affect the appearance of the building in the slightest, and affect its impermeability and overall safety in severe cases, burying many hidden dangers . [0003] In the raft pouring of super high-rise buildin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B2201/52C04B18/08C04B18/141C04B14/02C04B14/06C04B2103/34
Inventor 包贵安宋心赵世冉穆文芳贾世伟王欢
Owner 陕西秦汉恒盛新型建材科技股份有限公司
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