Concrete antifreezer

A technology of antifreeze and concrete, which is applied in the field of concrete antifreeze, which can solve the problems affecting the use and quality, aggregate reaction, high alkali content, etc., and achieve the effect of inhibiting alkali aggregate reaction, low cost and low content

Inactive Publication Date: 2012-11-21
JURONG NINGWU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional antifreeze agents mostly use nitrate and nitrite salts as antifreeze components, and the dosage is as high as 6-9% at a low temperature of -15°C. The high alkali content can easily lead to adverse effects such as alkali-aggregate reaction and alkali return in concrete. Phenomenon, affecting use and quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Preparation of calcium silicate hydrate: take 12 parts by weight of quicklime and 10 parts by weight of diatomaceous earth and mix them evenly, then grind them finely, then add 72 parts by weight of water to make a slurry and mix well, heat under the condition of 1 Reaction for 5h, standby.

[0012] Mix 40 parts by weight of calcium silicate hydrate, 35 parts by weight of sodium acetate and 5 parts by weight of lithium acetate, and stir evenly.

[0013] When preparing concrete under the negative temperature condition of -15℃, the dosage is 5% of the cement. After 7 days of negative temperature curing, the strength will reach the standard curing strength after 28 days of standard curing.

Embodiment 2

[0015] Preparation of calcium silicate hydrate: take 15 parts by weight of slaked lime and 10 parts by weight of opal and mix them evenly, then grind them finely; ,spare.

[0016] Take 50 parts by weight of calcium silicate hydrate, 30 parts by weight of potassium acetate and 11 parts by weight of lithium nitrate, mix, and stir evenly.

[0017] When preparing concrete under the negative temperature condition of -15℃, the dosage is 6% of the cement. After 7 days of negative temperature curing, the strength of the standard curing will reach the standard curing strength for 28 days.

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PUM

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Abstract

The invention discloses a concrete antifreezer. The antifreezer comprises, by weight 40-50 parts of tobermorite and 50-60 parts of antifreezing component, wherein the antifreezing component comprises potassium acetate or sodium acetate and lithium acetate or lithium nitrate, and the molar ratio of lithium and potassium or sodium in the antifreezing component is 0.1-0.8. According to the concrete antifreezer, the production process is simple and feasible, the cost is low and the concrete antifreezer is suitable for industrial production.

Description

technical field [0001] The invention relates to a concrete antifreeze, in particular to a concrete antifreeze with low salt content and low alkali-aggregate reaction effect. Background technique [0002] Concrete antifreeze refers to a concrete admixture that can continuously hydrate and harden concrete under negative temperature, and achieve the expected performance under specified curing conditions. In my country's "Three North" areas, winter lasts for a long time, and the construction period is shortened. When the temperature is lower than 0 °C, the freezing of concrete mixing water at negative temperature will not only stagnate the hydration of cement, but also cause the water to freeze. Volume expansion will cause damage to the structure of concrete hydration products. Therefore, adding antifreeze to negative temperature concrete for antifreeze is a common technical method for concrete negative temperature construction in winter. [0003] Traditional antifreezes mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/04
Inventor 应军翟洪金应珏
Owner JURONG NINGWU CHEM
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