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Significant increases in compressive and flexural strength, especially in early stages Increased Compressive Strength KAOROCK™ increases strength in all stages of the curing process. It reacts with the free calcium hydroxide (lime) produced during the cement hydration process to form additional cementitious materials. Both KAOROCK™ and silica fume showed increased strength in this laboratory test. Preliminary data on silica fume indicated a decrease at 1-day strength. As a result a new silica fume sample (SF Redo) was acquired and the test repeated.
Increased Flexural Strength KAOROCK™ increases flexural strength during the curing process, especially at early stages. During testing, concrete prisms were subjected to four-point bending with a water to cement ratio of 0.4. Metakaolin and silica fume reached 600 psi in one day indicating relevance to pavements. Metakaolin could be used to shorten the time needed before newly paved roads may be opened to traffic.
For a complete report on the laboratory tests completed at Georgia Tech submitted to ACI, please click this link Georgia Tech Comparison Study.
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