科研之友
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摘要
When concrete is placed in extreme climates, quality control of concrete is so difficult that cracking due to hydration heat easily occur. In the paper, new encapsulation technique is developed for control of cement hydration reaction through encapsulation of chemical admixtures. Lithium carbonate (Li2CO3) as accelerator and tartaric acid (C4H6O6) as retarder are respectively selected for core material. For wall material of microcapsule, acrylic resin, silicon monoxide, and starch is synthesized. Several tests including chemical shrinkage, setting time, compressive strength, and adiabatic temperature are performed for evaluating an effect of the invented microcapsule on cement hydration behavior. Through encapsulation of accelerator and retarder, cement hydration behaviors like setting time, strength, shrinkage, and hydration heat are reasonably controlled. The developed encapsulation technique can be applied for manufacturing high durable concrete in harsh environmental condition avoiding cracking.
- 出版日期2016-1
