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Retarded cement

A cement and retarding technology, which is applied in the field of retarded cement, can solve problems such as poor molding, cracking, and harsh environments, and achieve the effects of slow water loss, slowing down the speed of water evaporation, and reducing the setting speed

Inactive Publication Date: 2017-12-19
CHENGDU FANXINJIA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the environment in remote and tropical areas is harsh, and the use of conventional building materials is prone to various problems
Especially in the application of cement, due to the high temperature in tropical areas all the year round, when using the existing cement to pour concrete, the water is easy to evaporate in a short time, and the concrete solidifies quickly, which is easy to cause many problems such as cracking and poor molding.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment one, the present invention provides a kind of retarded cement, comprises following raw material composition by weight ratio:

[0010] Including the following raw materials by weight ratio: 10 parts of dicalcium silicate, 12 parts of dodecacalcium heptaaluminate, 3.5 parts of calcium aluminum feldspar, 2 parts of calcium sulfate, 0.5 parts of aluminum sulfate, 1.3 parts of soda, 0.1 parts of sodium chloride, nano 0.05 part of titanium dioxide, 0.5 part of mechanical binder.

[0011] Using the above cement to make concrete, compared with using conventional cement, at 40°C, the setting time increased by 13%.

Embodiment 2

[0012] Embodiment 2, the present invention provides a retarded cement, comprising the following raw materials by weight: 12 parts of dicalcium silicate, 15 parts of dodecacalcium heptaaluminate, 4 parts of calcium aluminum feldspar, 3 parts of calcium sulfate, aluminum sulfate 1 part, 1.5 parts of soda, 0.5 parts of sodium chloride, 0.1 part of nano-titanium dioxide, and 1 part of mechanical binder.

[0013] When the above cement is used to make concrete, compared with the conventional cement, the setting time is increased by 12.3% at 45°C.

Embodiment 3

[0014] Embodiment three, the present invention provides a kind of retarded cement, comprises the following weight ratio raw material composition:

[0015] 15 parts of dicalcium silicate, 18 parts of dodecacalcium heptaaluminate, 5 parts of calcium aluminum feldspar, 4.5 parts of calcium sulfate, 1.2 parts of aluminum sulfate, 2.1 parts of soda, 0.8 parts of sodium chloride, 0.15 parts of nano titanium dioxide, machine bonded 1.5 parts.

[0016] Using the above cement to make concrete, compared with using conventional cement, at 38°C, the setting time increased by 14%.

[0017] The above-mentioned organic binder is at least one of syrup, polyvinyl alcohol, carboxymethyl cellulose and starch.

[0018] The retarded cement of the present invention has a slow dehydration rate, and the use of the retarded cement slows down the evaporation rate of water in the concrete at high temperature, reduces the solidification rate of the concrete, and ensures the molding effect and quality of...

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PUM

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Abstract

The invention relates to the technical field of building materials, and discloses a retarded cement, which comprises the following composition by weight ratio of raw materials: 10-15 parts of dicalcium silicate, 12-18 parts of dodecacalcium heptaaluminate, and 3.5-5 parts of calcium aluminum feldspar , 2-4.5 parts of calcium sulfate, 0.5-1.2 parts of aluminum sulfate, 1.3-2.1 parts of soda, 0.1-0.8 parts of sodium chloride, 0.05-0.15 parts of nano-titanium dioxide, and 0.5-1.5 parts of mechanical binder. The use of the retarded cement slows down the evaporation rate of water in the concrete at high temperature, reduces the solidification rate of the concrete, and ensures the molding effect and quality of the concrete.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a retarded cement. Background technique [0002] Cement is a commonly used raw material for construction. It is a powdery hydraulic inorganic gelling material. It can be mixed with water to form a slurry. It can be hardened in the air or better hardened in water, and can firmly bond sand, stone and other materials. together. With the continuous enhancement of my country's comprehensive national strength, the country has been increasing its efforts in public infrastructure construction this year, especially in the construction of roads and railways in remote areas and plateau areas. However, the environment in remote and tropical areas is harsh, and the use of conventional building materials is prone to various problems. Especially in the application of cement, due to the high temperature in tropical regions all the year round, when pouring concrete with existing ceme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/04
CPCC04B7/04
Inventor 高静
Owner CHENGDU FANXINJIA TECH
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