Fibrous nano silicate concrete admixture and preparation method thereof

A concrete admixture, nano-silicate technology, applied in the direction of silicate, alkaline earth metal silicate, magnesium silicate, etc., can solve the problems of high brittleness, poor crack resistance, slow development of concrete strength, etc., and achieve toughness Improving and enhancing the effect of early strength

Active Publication Date: 2017-01-04
JIANGSU SOBUTE NEW MATERIALS
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Problems solved by technology

[0006] Aiming at the slow development of early strength of concrete, high brittleness, and poor crack resistance, the present

Method used

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  • Fibrous nano silicate concrete admixture and preparation method thereof
  • Fibrous nano silicate concrete admixture and preparation method thereof
  • Fibrous nano silicate concrete admixture and preparation method thereof

Examples

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preparation example Construction

[0029] (1) Preparation of fibrous nano-magnesium silicate suspension

[0030] In a 500ml three-necked flask, make a base with the aqueous solution of the polymer dispersant, add 20% magnesium silicate and 20% sodium silicate aqueous solution dropwise to the continuously stirring polymer solution simultaneously, and control the reaction temperature to 80-90°C, the dropping time is 5-8h. Concrete preparation embodiment sees table 3:

[0031] The preparation of table 3 nanometer magnesium silicate suspension

[0032]

[0033] (2) Preparation of fibrous nano silicate admixture

[0034] Under the condition of 20 DEG C, the soluble calcium salt and the soluble silicate solution are added dropwise to the above-mentioned fibrous nano-magnesium silicate suspension diluted with water ( In NM), the dropping time should be controlled within 4-6 hours to obtain a fibrous nano silicate suspension concrete admixture with a solid content of 5-10%. The specific preparation example is sh...

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Abstract

The invention discloses a fibrous nano silicate concrete admixture. The fibrous nano silicate concrete admixture is a compound prepared by magnesium silicate and calcium silicate in a high molecular polymer dispersing agent water solution, wherein the magnesium silicate is prepared by soluble magnesium salt and soluble silicate according to the mole ratio of 1: 1.2 to 1: 1.6, the calcium silicate is prepared from soluble calcium salt and soluble silicate according to the mole ratio of 1: 1 to 1: 1.5, the soluble calcium salt is magnesium nitrate, the soluble calcium salt is calcium nitrate, the soluble silicate is sodium silicate, a high molecular polymer dispersing agent is shown by a formula shown in the description. The fibrous nano silicate concrete admixture can remarkably improve the early strength of concrete. In addition, the concrete toughness has an obvious improving effect, early hydration of cement can be accelerated, and improvement of bending resistance and tension resistance capability of a cement-based material is promoted.

Description

technical field [0001] The invention relates to a concrete admixture based on nanofiber technology and a preparation method thereof, belonging to the technical field of concrete chemical 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. In addition, high brittleness and poor crack resistance are also very important shortcomings. [0003] In order to overcome these defects of concrete materials, scientists and engineers in the field of civil science and material sci...

Claims

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Application Information

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IPC IPC(8): C04B24/32C01B33/22C01B33/24
CPCC01B33/22C01B33/24C01P2004/16C04B40/0039C04B22/08C04B24/32
Inventor 张建纲杨勇冉千平黄振舒鑫曹攀攀严涵
Owner JIANGSU SOBUTE NEW MATERIALS
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