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A kind of large volume low hydration heat concrete and preparation method thereof

A low hydration heat, concrete technology, applied in the field of civil engineering, can solve the problems affecting the safety and normal use of concrete structures, multi-temperature cracks, etc. Effect

Active Publication Date: 2022-07-22
深圳市东大洋水泥制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the current mass concrete is produced, due to its small surface coefficient, the release of cement hydration heat is relatively concentrated, resulting in a rapid internal temperature rise. Many temperature cracks affect the structural safety and normal use of concrete

Method used

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  • A kind of large volume low hydration heat concrete and preparation method thereof
  • A kind of large volume low hydration heat concrete and preparation method thereof
  • A kind of large volume low hydration heat concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A high-volume, low-heat of hydration concrete is prepared by the following steps:

[0051]Step 1: after mixing cement, water and sulfonated melamine formaldehyde resin water reducing agent, rotate speed 100r / min, stir for 1.5h, and obtain the first mixture after mixing uniformly;

[0052] Step 2: adding sand, fly ash and stones to the first mixture, rotating at 130r / min, stirring for 1.5h, and mixing uniformly to obtain the second mixture;

[0053] Step 3: The polyvinyl butyral was heated to 84° C., and then added to the second mixture at a rotational speed of 150 r / min, and stirred for 0.5 h, and the third mixture was obtained after mixing uniformly.

[0054] Step 4: Heat the polyethersulfone to 250°C, add it to the third mixture, rotate at 120r / min, and stir for 2.5h. After mixing uniformly, a large volume of low-heat of hydration concrete is obtained.

Embodiment 2

[0056] A high-volume, low-heat of hydration concrete is prepared by the following steps:

[0057] Step 1: After mixing cement, water and sodium methacrylate water reducing agent, the rotating speed is 100r / min, stirring for 2.5h, and the first mixture is obtained after mixing uniformly;

[0058] Step 2: adding sand, fly ash and stones to the first mixture, rotating at 130r / min, stirring for 1h, and mixing uniformly to obtain the second mixture;

[0059] Step 3: The polyvinyl butyral was heated to 66° C., and then added to the second mixture at a rotational speed of 150 r / min, and stirred for 1 hour, and the third mixture was obtained after mixing uniformly.

[0060] Step 4: Heat the polyethersulfone to 200°C, then add it to the third mixture at a speed of 120r / min, and stir for 1 hour. After mixing evenly, a large volume of low-heat of hydration concrete is obtained.

Embodiment 3

[0062] A high-volume, low-heat of hydration concrete is prepared by the following steps:

[0063] Step 1: after mixing cement, water and calcium lignosulfonate water-reducing agent, the rotating speed is 100r / min, stirring for 2h, and the first mixture is obtained after mixing uniformly;

[0064] Step 2: adding sand, fly ash and stones to the first mixture, rotating at 130r / min, stirring for 1.3h, and mixing uniformly to obtain the second mixture;

[0065] Step 3: The polyvinyl butyral was heated to 75° C., and then added to the second mixture at a rotational speed of 150 r / min, and stirred for 0.8 h, and the third mixture was obtained after mixing uniformly.

[0066] Step 4: Heat the polyethersulfone to 230°C, add it to the third mixture, rotate at 120r / min, and stir for 2h. After mixing uniformly, a large-volume low-heat of hydration concrete is obtained.

[0067] Wherein, in embodiment 1-3, the water reducing agent adopts one of sulfonated melamine formaldehyde resin water...

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Abstract

The present application relates to the field of civil engineering, and specifically discloses a large volume low hydration heat concrete and a preparation method thereof. The large-volume low-heat-of-hydration concrete includes polyvinyl butyral, polyethersulfone, fly ash, stones, cement, water, water-reducing agent, and sand; its preparation method is as follows: firstly, cement, water, water-reducing agent, Mix and stir to obtain a first mixture, then add sand, fly ash, and stones to the first mixture and mix evenly to obtain a second mixture, then heat up the polyvinyl butyral, then add it to the second mixture and mix evenly , obtain the third mixture, and finally heat up the polyethersulfone, then add it to the third mixture and mix evenly, that is, a large-volume low-heat-of-hydration concrete is obtained. The present application has the effect of reducing the occurrence of more temperature cracks during molding of the mass concrete.

Description

technical field [0001] The present application relates to the field of civil engineering, and more particularly, it relates to a high-volume, low-heat of hydration concrete and a method of making the same. Background technique [0002] Concrete is abbreviated as "concrete": it refers to the collective name of engineering composite materials that cement aggregates into a whole by cementing materials. The term concrete usually refers to using cement as cementing material and sand and stone as aggregates; and Water is mixed in a certain proportion, and the cement concrete obtained by mixing is widely used in civil engineering. [0003] With the continuous development of concrete components, people's performance requirements for concrete are not limited to compressive strength, but on the basis of strength, more attention is paid to the balance and coordination of comprehensive indicators such as durability and deformation performance of concrete. The requirements of various pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B24/26C04B24/28C04B14/46C04B14/06C04B40/00
CPCC04B28/00C04B24/2635C04B24/28C04B14/4656C04B14/062C04B40/0028C04B24/223C04B14/06C04B14/02C04B18/08C04B2103/302C04B24/18
Inventor 马伍平
Owner 深圳市东大洋水泥制品有限公司
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