Early strength agent and application thereof in concrete material
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A technology of early strength agent and concrete, applied in the field of 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., to meet service strength and durability Requirements, significant strength enhancement, accelerated hardening time effect
Active Publication Date: 2020-11-20
绵阳市安州区荣盛建材有限公司
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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 a
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Embodiment 1
[0021] An early strength agent, comprising the following components:
[0022] 30kg of magnesium fluorosilicate, 14kg of lithium sulfate, 15kg of sodium sulfate, 15kg of sodium nitrite, 55kg of pre-hydrated cement particles;
[0023] The preparation method of the prehydrated cement granules is as follows: 80kg of cement and 20kg of water are stirred evenly, granulated and cured for 28 days, then ball milled, and sieved with 200 mesh to obtain the prehydrated cement granules.
Embodiment 2
[0025] An early strength agent, comprising the following components:
[0026] 50kg of magnesium fluorosilicate, 20kg of lithium sulfate, 25kg of sodium sulfate, 25kg of sodium nitrite, 75kg of pre-hydrated cement particles;
[0027] The preparation method of the pre-hydrated cement particles is as follows: uniformly stirring 120 kg of cement and 40 kg of water, granulating and curing for 30 days, then ball milling, and sieving through a 300-mesh sieve to obtain the pre-hydrated cement particles.
Embodiment 3
[0029] An early strength agent, comprising the following components:
[0030] 40kg of magnesium fluorosilicate, 16kg of lithium sulfate, 20kg of sodium sulfate, 20kg of sodium nitrite, 60kg of pre-hydrated cement particles;
[0031] The preparation method of the pre-hydrated cement particles is as follows: 100 kg of cement and 30 kg of water are uniformly stirred, granulated and then cured for 28 days, then ball-milled and screened with 300 mesh to obtain the pre-hydrated cement particles.
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Abstract
The invention discloses an early strength agent and application thereof in a concrete material. The early strength agent comprises the following components in parts by weight: 30-50 parts of magnesiumfluosilicate, 14-20 parts of lithium sulfate, 15-25 parts of sodium sulfate, 15-25 parts of sodium nitrite and 55-75 parts of pre-hydrated cement particles. The preparation method of the pre-hydratedcement particles comprises the following steps: uniformly stirring 80-120 parts by weight of cement and 20-40 parts by weight of water, granulating, maintaining for 28-30 days, carrying out ball milling, and screening with a 200-300-mesh sieve to obtain the pre-hydrated cement particles. The performance of the early strength agent can be remarkably improved and the hardening time can be shortenedby the self-making pre-hydrated cement particles and combining the pre-hydrated cement particles with other components, and the early strength agent has a remarkable effect of enhancing the later strength of a cement base material, does not shrink and meets the requirements on the service strength and durability of concrete.
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 on the strength of concrete prefabricated components. Therefore, how to improve the early strength of precast concrete components is the key to the technology. [0003] Early-strength admixture 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, and has no significant effect on the later strength. Its mechanism of action is to accelerate the hydration rate of cement and provide cement cementing components, thereby promotin...
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