A kind of nano-suspension concrete early strength agent and preparation method thereof

A nano-suspension and concrete technology, applied in the field of nano-technology-based concrete early-strength agent and its preparation, and early-strength concrete admixture, can solve problems such as insufficient early-strength effect, decreased concrete durability, and complicated preparation process. Achieve the effect of being conducive to active excitation, excellent early strength performance, and improving early strength

Active Publication Date: 2017-10-10
JIANGSU SOBUTE NEW MATERIALS
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  • Application Information

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Problems solved by technology

[0005] Aiming at the disadvantages of the existing early strength agents, such as insufficient early strength effect at the age of several hours to one day, easy reduction of concrete durability, complicated preparation process, etc., the purpose of the present invention is to provide a simple production, wide source of raw materials, early strength Nano early strength agent with outstanding effect and low price

Method used

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  • A kind of nano-suspension concrete early strength agent and preparation method thereof
  • A kind of nano-suspension concrete early strength agent and preparation method thereof
  • A kind of nano-suspension concrete early strength agent and preparation method thereof

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preparation example Construction

[0020] (1) Preparation of polymer dispersant

[0021] Prepare the polymer with molecular formula (I) according to Chinese patent 20110393582.0, and without neutralization, its molecular formula is:

[0022]

[0023] The above polymer solution was neutralized with calcium oxide or zinc oxide to obtain a polymer dispersant with a solid content of 40%, as shown in Table 1.

[0024] Table 1 Parameters and codes of polymer dispersants

[0025]

[0026] (2) Preparation of nano-suspension concrete early strength agent

[0027] The solution that the high molecular polymer dispersant that step (1) makes and soluble calcium salt, soluble zinc salt, soluble aluminum salt is formed adds in the there-necked flask of 500ml, under the condition of 10-20 ℃, stirs rapidly; Then put The soluble silicate is formulated into an aqueous solution, which is slowly added dropwise to the above mixed solution for 5-8 hours. Concrete preparation example is as follows:

preparation Embodiment 1

[0029] In a 500mml three-necked flask, 75g P1, 11.8g Ca(NO 3 ) 2 4H 2 O, 19.0gAl(NO 3 ) 3 9H 2 O, 7.5gZnNO 3 ·7H 2 O was dissolved into 136.7g of water, and then Na with a mass concentration of 5.7% 2 SiO 3 9H 2 Add 250 g of O sodium silicate solution dropwise to the mixed solution for 8 hours, and keep the temperature of the solution at 18° C. during the dropwise addition.

preparation Embodiment 2

[0031]In a 500mml three-necked flask, 100g P3, 11.3g Ca(NO 2 ) 2 2H 2 O), 15.0g (Al(NO 3 ) 3 9H 2 O, 6.0g ZnNO 3 ·7H 2 O was dissolved into 167.7g of water, and then the mass concentration was 7.2% Na 2 SiO 3 9H 2 Add 200 g of O sodium silicate solution dropwise to the mixed solution for 6 hours, and keep the solution temperature at 20°C during the dropwise addition.

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Abstract

The invention provides a nano-suspension concrete early-strength agent and a preparation method thereof. The nano-suspension concrete early-strength agent is made of a nano-calcium silicate suspension doped with transition metal elements, and the main composition of the suspension is It is nano silicon particles, the chemical structure of nano silicon particles is aCaO bAl2O3 cZnO SiO2 6H2O, where 1≤a≤2; 0.50≤b≤1; 0.25≤c≤0.50; the nano silicon particles are composed of soluble calcium salt , Soluble silicate, soluble aluminum salt, soluble zinc salt and polymer dispersant. On the one hand, the early strength agent does not contain chlorine salt and has no corrosion effect on the steel bars in the concrete; on the other hand, it is an extremely stable suspension system, which is easy to add and evenly disperse in the concrete preparation process; it can significantly improve the early strength of concrete, The effect of early strength of concrete using large amount of mineral admixture is particularly obvious, especially suitable for the production of concrete prefabricated components, which can reduce or even eliminate the steam curing process.

Description

technical field [0001] The invention relates to an early-strength concrete admixture, in particular to a nanotechnology-based concrete early-strength admixture and a preparation method thereof, belonging to the technical field of concrete admixtures. Background technique [0002] Concrete is currently the most used building material in the world, and its main advantages are low price, strong bearing capacity and high durability. However, due to the slow hydration reaction process of Portland cement and the influence of ambient temperature, the strength of concrete develops slowly. Generally, it takes more than 24 hours to reach the strength of the demolition formwork, and the strength can only reach 40-50% of the design strength in 3 days. It takes more than 28 days to reach the design strength. At the same time, with the development of concrete technology, industrial wastes are used as basic raw materials in concrete more and more widely. In order to improve the durability...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32
Inventor 刘加平张建纲杨勇冉千平舒鑫毛永琳曹攀攀
Owner JIANGSU SOBUTE NEW MATERIALS
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