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A kind of early strength agent and its application in concrete material

An early-strength agent and concrete technology, which is applied to the early-strength agent and its application in concrete materials, can solve the problems of poor environmental adaptability, small increase in early strength, slow hardening time, etc., so as to meet the service strength and durability performance requirements, significant strength enhancement, and the effect of accelerating hardening time

Active Publication Date: 2022-03-04
绵阳市安州区荣盛建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the existing technology has developed a variety of early-strength admixtures other than chloride and sulfate, such as nitrite, chromate, etc., and organic early-strength agents, such as triethanolamine, calcium formate, urea etc., but most of them have problems such as complex preparation process, high cost, and poor environmental adaptability. At the same time, the early strength of cement early strength agents in the prior art is not greatly improved, the hardening time is slow, and the problem of later strength is not taken into account.

Method used

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  • A kind of early strength agent and its application in concrete material

Examples

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Embodiment 1

[0021] An early strength agent, comprising the following components:

[0022] Magnesium fluorosilicate 30kg, lithium sulfate 14kg, sodium sulfate 15kg, sodium nitrite 15kg, prehydrated cement particles 55kg;

[0023] The preparation method of the pre-hydrated cement granules is as follows: 80 kg of cement and 20 kg of water are evenly stirred, granulated and cured for 28 days, then ball milled, and sieved with 200 meshes to obtain pre-hydrated cement granules.

Embodiment 2

[0025] An early strength agent, comprising the following components:

[0026] Magnesium fluorosilicate 50kg, lithium sulfate 20kg, sodium sulfate 25kg, sodium nitrite 25kg, prehydrated cement particles 75kg;

[0027] The preparation method of the pre-hydrated cement granules is as follows: 120 kg of cement and 40 kg of water are evenly stirred, granulated and cured for 30 days, then ball milled, and sieved with 300 meshes to obtain the pre-hydrated cement granules.

Embodiment 3

[0029] An early strength agent, comprising the following components:

[0030] Magnesium fluorosilicate 40kg, lithium sulfate 16kg, sodium sulfate 20kg, sodium nitrite 20kg, prehydrated cement particles 60kg;

[0031] The preparation method of the pre-hydrated cement granules is as follows: 100 kg of cement and 30 kg of water are evenly stirred, granulated and cured for 28 days, then ball milled, and sieved with 300 meshes to obtain the pre-hydrated cement granules.

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Abstract

The invention discloses an early strength agent and its application in concrete materials. The early strength agent comprises the following components in parts by weight: 30-50 parts of magnesium fluorosilicate, 14-20 parts of lithium sulfate, sulfuric acid 15-25 parts of sodium, 15-25 parts of sodium nitrite, 55-75 parts of pre-hydrated cement particles. The preparation method of the prehydrated cement granules is as follows: in parts by weight, mix 80-120 parts of cement and 20-40 parts of water evenly, perform maintenance for 28-30 days after granulation, then ball mill, and sieve through 200-300 mesh , to obtain prehydrated cement particles. The present invention can significantly improve the performance of the early strength agent by self-made prehydration cement particles and combination with other components, accelerate the hardening time, and have a significant effect on the strength enhancement of the cement base material in the later stage, without shrinkage, and meet the service strength of concrete and durability requirements.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to an early strength agent and its application in concrete materials. Background technique [0002] With the development of urban infrastructure construction, the construction of prefabricated houses, urban subway tunnels and other engineering projects is booming. Such projects with fast construction progress have higher requirements for the strength of concrete prefabricated components. Therefore, how to improve the early strength of concrete prefabricated components is the key to technology. [0003] Early strength agent is one of the admixtures of concrete and concrete-based materials. It refers to the admixture that can improve the early strength of concrete and concrete-based materials without significantly affecting the later strength. Its mechanism of action is to accelerate the hydration speed of cement and provide cement bonding components, thereby promoting th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/14C04B18/02C04B24/38C04B103/14
CPCC04B40/0039C04B18/021C04B2103/14C04B22/126C04B22/147C04B22/085C04B24/04C04B24/085C04B14/06C04B24/383C04B14/042
Inventor 李浩李昌荣胡川
Owner 绵阳市安州区荣盛建材有限公司
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