1. Usually need to maintain the intensity: expansion agent in the field of material is usually created by reaction with water volume increase cell (for example,ettringite)which in turn caused inflation, so it is necessary to give enough in the process of using maintenance;
2. The expansion agent is not gelling materials: strength type composite materials are usually divided into coarse aggregate, fine aggregate, gelled material (adhesive), and functional admixture (such as water reducing agent, coagulant retarder, etc.). The expansion agent is usually in solid state powder, and its use is not for the adhesion, it can not replace the gelation material.
3. The method of doping: usually mixed in and out of two kinds. In mixed with the description of dosage calculation, is a kind of material in mixing is "when calculating the ratio of the expansion agent as a gelled material", the additive is quantitative add outside than the original ones, so a small amount of increase the dosage of water reducing agent is usually required.
4. Main applications: the production of non-metallic, non-sintered composite materials, such as concrete and amorphous refractory materials.
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