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Calcium silicate hydrate gel solution early strength agent and preparation method thereof

A technology of hydrated calcium silicate and gel solution, applied in the field of building material production, can solve the problems of difficult storage and weighing, unsatisfactory early strength effect, complicated preparation process, etc., to reduce equipment investment, facilitate transportation and weighing good dispersion uniformity and stability

Inactive Publication Date: 2015-03-11
SHANGHAI CONSTRUCTION GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a calcium silicate hydrate gel solution early strength agent and its preparation method, to solve the traditional calcium silicate hydrate powder preparation process complex, high cost, difficult to store and weigh, early strength Problems with unsatisfactory results

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  • Calcium silicate hydrate gel solution early strength agent and preparation method thereof

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Embodiment 1

[0023] A calcium silicate hydrate gel solution early strength agent, its raw materials include: calcium material, siliceous material, gel dispersant and water, wherein the weight ratio of calcium material and siliceous material is 0.3-3: 1. The weight ratio of water to the total weight of calcareous material and siliceous material is 5-30:1, and the mass fraction of gel dispersant is 0.01%-0.50%.

[0024] Specifically, for the convenience of obtaining materials, the siliceous material is sodium silicate powder, and the calcium material is calcium nitrate crystal. According to the weight ratio of water to the total weight of calcareous material and siliceous material (i.e. water-solid ratio), the weight ratio of calcareous material and siliceous material (calcium-silicon ratio), calculate the ratio of sodium silicate, calcium nitrate and water respectively. Dosage, and accurately weighed spare. Moreover, the present invention selects high-molecular polymers such as naphthalene...

Embodiment 2

[0026] The raw material of calcium silicate hydrate gel solution early strength agent is: the molar ratio of calcium material and siliceous material is 1:1, the weight ratio of water to the total weight of calcium material and siliceous material is 5:1, The mass fraction of the gel dispersant is 0.20%. At this time, when preparing the calcium silicate hydrate gel solution, the aqueous solution of sodium silicate and the aqueous solution of calcium nitrate need to be stirred for 20 s respectively, and the dispersant needs to be stirred for 30 s respectively after adding the dispersant. Moreover, the aqueous solution of sodium silicate and calcium nitrate When the aqueous solution reacts, it needs to be stirred for 360s. Finally, the product obtained is milky white gel liquid, which is calcium silicate hydrate gel mixed solution. At this time, the mass fraction of calcium silicate hydrate in the calcium silicate hydrate gel mixed solution is about 5%.

Embodiment 3

[0028] The raw material of calcium silicate hydrate gel solution early strength agent is: the molar ratio of calcareous material to siliceous material is 0.8:1, the weight ratio of water to the total weight of calcium material and siliceous material is 10:1, The mass fraction of the gel dispersant is 0.30%. At this time, when preparing the calcium silicate hydrate gel solution, the aqueous solution of sodium silicate and the aqueous solution of calcium nitrate need to be stirred for 25 seconds respectively. , After adding the dispersant, it needs to be stirred for 45s, and when the aqueous solution of sodium silicate and the aqueous solution of calcium nitrate react, it needs to be stirred for 300s. Finally, the product obtained is milky white gel liquid, which is calcium silicate hydrate gel mixed solution. At this time, the mass fraction of calcium silicate hydrate in the calcium silicate hydrate gel mixed solution is about 3%.

[0029] In particular, in order to facilitat...

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Abstract

The invention discloses a calcium silicate hydrate gel solution early strength agent and a preparation method thereof, and relates to the technical field of construction material production. The early strength agent and the method are used for solving problems of complicated preparation process, high cost, storage difficulty, weighing difficulty, and poor early strength effect of traditional calcium silicate hydrate powder. The calcium silicate hydrate gel solution early strength agent comprises a calcareous material, a siliceous material, a gel dispersant, and water. A weight ratio of the calcareous material to the siliceous material is 0.3-3:1. A weight ratio of water to the total of the calcareous material and the siliceous material is 5-30:1. The mass percentage of the gel dispersant is 0.01-0.50%. The preparation method of the early strength agent comprises the following steps: reaction materials are weighed; a sodium silicate water solution and a calcium nitrate water solution are respectively prepared; the gel dispersant is respectively added into the solutions; and the two solutions are mixed and allowed to react for a certain period of time. The early strength agent is convenient to store, transport and weigh, and have good product stability. With the early strength agent, cement-based material early strength can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of building material production, in particular to a calcium silicate hydrate gel solution accelerator and a preparation method thereof. Background technique [0002] The early strength agent is an additive that accelerates the hydration of cement and improves the early strength of cement-based materials. Calcium silicate hydrate (C-S-H) is a common accelerator. Usually, sodium silicate and calcium nitrate are selected as siliceous materials and calcium materials, and the solution reaction method is used to prepare calcium silicate hydrate. Specifically, in the laboratory preparation process, first weigh sodium silicate and calcium nitrate according to a certain calcium-silicon ratio and water-solid ratio and add water to dissolve; then mix the dissolved sodium silicate solution and calcium nitrate solution, and simultaneously Add deionized water and react under water bath conditions; finally, after the rea...

Claims

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Application Information

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IPC IPC(8): C04B24/22C04B22/08
Inventor 许永和徐俊王圣怡周云史晓婉
Owner SHANGHAI CONSTRUCTION GROUP
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