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The decomposition stages of mortars can be differentiated according to the temperature range. The first window of weight loss between 20 and 110 C corresponded to the evaporation of free water. The second window of weight loss between 120 and 400 C corresponded to the loss of water from the hydrated calcium silicate (CSH) gel and the minority phases of aluminates and sulfoaluminates. The third window of weight loss between 410 and 530 C corresponded to the decomposition of calcium hydroxide, whereby water was released and calcium oxide remained. The final window of weight loss between 550 and 950 C corresponded to the decomposition of the calcium carbonate present in the cementitious material [36]. In the case of pure polyurea, the degradation of urea bonds was identified. However, when analyzing the mixture of mortars with polyurea, the effect of polyurea on mortar decomposition was mediated by two factors, the concentration and the size of the polyurea, with the particle size being more influential due to it improving the interaction between components. The variations between different mortars may have been due to the number of degraded urea-type bonds, the dispersion of particles in the mortar, and their interaction with the components of the mortar. As fewer interstices were identified by SEM analysis in the mortar with polyurea retained in sieve 100, the effect of the concentration was more noticeable than for the mortar with polyurea retained in sieve 50. Overall, it can be observed that adding PU in different concentrations and sizes affected the thermal stability of the mortar, which translated into variations in the amount of material lost at each stage.
QuickFloor 15 Minute Concrete Repair Patch is a 2-part mix that quickly pours out as a black liquid and cures as a grey solid. The combined polyurea chemistry allows for foot traffic in just 15 minutes at 70F. A fully cured QuickFloor 15 Minute Concrete Patch is stronger than concrete or asphalt repaired and can be applied at temperatures as low as 5F, making it perfect for commercial freezers. 153554b96e
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