In order to improve the performance of concrete, save water and adjust the strength grade of concrete, GRC Some admixtures will be added to the components. Admixtures added in GRC components are mainly natural or artificial powder minerals, which can improve the performance of concrete when mixing.
There are mainly the following types of Baotou GRC Admixtures often added to members:
1) The material has active hydraulic properties.
This mixed material can not harden itself, but can interact with calcium hydroxide precipitated during cement hydration to gradually harden and form a strong and relatively stable colloid. These materials include acid high protective slag, protective slag, fly ash, light burning clay, volcanic rock and sedimentary rock containing amorphous silicon oxide.
2) Micro active admixtures.
Also called filling material, this material and cement composition cannot play a chemical role, nor can it play a very weak chemical role. However, this material can change some properties of concrete, such as volume change, and increase the density of GRC components, such as powdered quartz, sand clay and various waste residues.
3) Materials with weak self hardness.
For example, alkaline granulated blast furnace slag, some slag and burnt shale ash, etc. The material itself can harden in water.
However, the above three external materials must be ground before use, so the common external material of GRC component manufacturers is fly ash. The content of prestressed GRC component can reach 15%; In the non prestressed and C20 concrete strength grades, the mixing amount can reach 25%.
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