Anti-freezing cement

A technology of cement and Portland cement, which is applied in the field of antifreeze cement, can solve the problems of complex construction, insecure construction, and unsuitability for large-scale application, and achieve the effect of good antifreeze effect, good long-term durability, and reduced possibility of freezing damage

Inactive Publication Date: 2017-05-31
QINGDAO HUANAN SHENGYUAN FRUIT IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The construction industry is generally constructed outdoors. In winter, when the outdoor temperature is below zero, the cement will freeze, so construction will not be possible.
Usually, in order to prevent the cement concrete mixture from being damaged by freezing at low temperature, people usually use antifreeze methods such as adding antifreeze or steam curing, heat preservation, etc., but the latter is not suitable for large-scale application due to complicated construction and low efficiency.
[0003] At present, the addition of antifreeze usually uses admixtures, such as early strength agents, antifreeze agents, etc., to prevent the mixture of cement and concrete from freezing at low temperatures. Early strength agents and antifreeze agents can only make cement use at a minimum temperature of minus 10 degrees Celsius. , but these antifreezing agents have the following disadvantages: (1) low drug efficacy and large dosage, the general dosage accounts for 3.5-15% of the cement weight, which brings many inconveniences to transportation and use; (2) the antifreeze degree is not high, The existing cement antifreeze can generally withstand about -10°C, which can only meet the winter construction needs in some areas, and there is still no guarantee for winter construction in some areas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] An antifreeze cement is composed of the following parts by weight: 15 parts of calcium chloride, 5 parts of sodium chloride, 1 part of sodium nitrite, 8 parts of sodium chloride, 15 parts of gypsum, 5 parts of alum, metaaluminic acid 10 parts of calcium, 15 parts of sodium thiocyanate, 25 parts of calcium silicate hydrate, 15 parts of triethanolamine, 15 parts of glass fiber, 25 parts of sodium carbonate, 60 parts of Portland cement clinker.

[0013] Further, an antifreeze cement is prepared by the following method: crushing and drying each raw material, batching, grinding, calcining, stirring, and grinding, adding other antifreeze components into the calcined clinker, and putting it into the stirred After being fully stirred in the device, they are co-ground to make cement products.

Embodiment 2

[0015] An antifreeze cement is composed of the following parts by weight: 20 parts of calcium chloride, 10 parts of sodium chloride, 5 parts of sodium nitrite, 12 parts of sodium chloride, 25 parts of gypsum, 10 parts of alum, metaaluminic acid 15 parts of calcium, 20 parts of sodium thiocyanate, 35 parts of calcium silicate hydrate, 22 parts of triethanolamine, 20 parts of glass fiber, 30 parts of sodium carbonate, 70 parts of Portland cement clinker.

[0016] Further, an antifreeze cement is prepared by the following method: crushing and drying each raw material, batching, grinding, calcining, stirring, and grinding, adding other antifreeze components into the calcined clinker, and putting it into the stirred After being fully stirred in the device, they are co-ground to make cement products.

Embodiment 3

[0018] An antifreeze cement is composed of the following parts by weight: 18 parts of calcium chloride, 8 parts of sodium chloride, 4 parts of sodium nitrite, 10 parts of sodium chloride, 20 parts of gypsum, 8 parts of alum, metaaluminic acid 12 parts of calcium, 18 parts of sodium thiocyanate, 30 parts of calcium silicate hydrate, 20 parts of triethanolamine, 18 parts of glass fiber, 28 parts of sodium carbonate, 65 parts of Portland cement clinker.

[0019] Further, an antifreeze cement is prepared by the following method: crushing and drying each raw material, batching, grinding, calcining, stirring, and grinding, adding other antifreeze components into the calcined clinker, and putting it into the stirred After being fully stirred in the device, they are co-ground to make cement products.

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PUM

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Abstract

The invention relates to the field of an anti-freezing building material, specifically to anti-freezing cement. The anti-freezing cement is composed of the following substances (by weight): 15-20 parts of calcium chloride, 5-10 parts of sodium chloride, 1-5 parts of sodium nitrite, 8-12 parts of sodium chloride, 15-25 parts of gypsum, 5-10 parts of alum, 10-15 parts of calcium metaaluminate, 15-20 parts of sodium sulfocyanate, 25-35 parts of hydrated calcium silicate, 15-22 parts of triethanolamine, 15-20 parts of glass fibre, 25-30 parts of sodium carbonate and 60-70 parts of Portland cement clinker. The anti-freezing cement provided by the invention has a good anti-freezing effect, has good long-term durability, can form many hydrates at low environment temperature within unit time, and reaches anti-freezing critical strength in the shortest possible time so as to reduce the possibility of causing freeze injury to the ground due to sudden drop of temperature.

Description

technical field [0001] The invention relates to the field of antifreeze building materials, in particular to antifreeze cement. Background technique [0002] The construction industry is generally constructed outdoors. In winter, when the outdoor temperature is below zero, the cement will freeze, so construction will not be possible. Usually, in order to prevent the cement concrete mixture from being damaged by freezing at low temperature, people usually adopt antifreeze methods such as adding antifreeze or steam curing, heat preservation, etc., but the latter is not suitable for large-scale application due to complicated construction and low efficiency. [0003] At present, the addition of antifreeze usually uses admixtures, such as early strength agents, antifreeze agents, etc., to prevent the mixture of cement and concrete from freezing at low temperatures. Early strength agents and antifreeze agents can only make cement use at a minimum temperature of minus 10 degrees Ce...

Claims

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Application Information

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IPC IPC(8): C04B7/04
Inventor 陈宝山
Owner QINGDAO HUANAN SHENGYUAN FRUIT IND CO LTD
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