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Mass 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: 2021-10-12
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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  • Mass low-hydration-heat concrete and preparation method thereof
  • Mass low-hydration-heat concrete and preparation method thereof
  • Mass low-hydration-heat concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0051]Step 1: After mixing cement, water, and sulfonated melamine formaldehyde resin water reducer, the rotation speed is 100r / min, stirring for 1.5h, and the first mixture is obtained after mixing evenly;

[0052] Step 2: Add sand, fly ash, and stones to the first mixture at a speed of 130r / min, stir for 1.5h, and mix well to obtain the second mixture;

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

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

Embodiment 2

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

[0057] Step 1: After mixing cement, water, and sodium methyl propylene sulfonate superplasticizer, the rotation speed is 100r / min, stirring for 2.5 hours, and the first mixture is obtained after mixing evenly;

[0058] Step 2: Add sand, fly ash, and stones to the first mixture at a speed of 130r / min, stir for 1 hour, and mix well to obtain the second mixture;

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

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

Embodiment 3

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

[0063] Step 1: After mixing cement, water, and calcium lignosulfonate superplasticizer, rotate at a speed of 100r / min, stir for 2 hours, and mix well to obtain the first mixture;

[0064] Step 2: Add sand, fly ash and stones to the first mixture at a speed of 130r / min, stir for 1.3h, and mix well to obtain the second mixture;

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

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

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

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Abstract

The invention relates to the field of civil engineering, and particularly discloses mass low-hydration-heat concrete and a preparation method thereof. The mass low-hydration-heat concrete comprises polyvinyl butyral, polyether sulfone, fly ash, stones, cement, water, a water reducing agent and sand. The preparation method comprises the following steps of: uniformly mixing and stirring the cement, the water and the water reducing agent to obtain a first mixture; adding the sand, the fly ash and the stones into the first mixture, performing uniform mixing to obtain a second mixture; heating the polyvinyl butyral, then adding the polyvinyl butyral into the second mixture, performing uniform mixing to obtain a third mixture; and finally, heating the polyether sulfone, adding the polyether sulfone into the third mixture, and performing uniform mixing to obtain the mass low-hydration-heat concrete. With the preparation method adopted, more temperature cracks generated during forming of the mass concrete can be reduced.

Description

technical field [0001] This application relates to the field of civil engineering, more specifically, it relates to a kind of concrete with low heat of hydration of large volume and preparation method thereof. Background technique [0002] Concrete is referred to as "concrete" for short: 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 cement as cementing material and sand and stone as aggregates; 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 composition materials, people's performance requirements for concrete are not limited to compressive strength, but on the basis of strength, they pay more attention to the balance and coordination of comprehensive indicators such as durability and deformation performance of concrete. Concrete The r...

Claims

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Application Information

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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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