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Chemical Composition and Hydraulic Properties of Incinerated Wastepaper Sludge

Khrystyna Sobol1, Serhiy Solodkyy1, Nadiya Petrovska1, Sergiy Belov2, Oleksii Hunyak1, Volodymyr Hidei1
1 Lviv Polytechnic National University, 12, Bandera St., 79013 Lviv, Ukraine 2 PJSC “Kyiv Cardboard and Paper Mill”, 130, Kyivska St., 08703 Obukhiv, Ukraine
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The hydraulic properties of ash from incinerated wastepaper sludge were investigated. It is shown that the phase composition of wastepaper sludge after heat treatment is similar to the classical fired carbonate-clay mixes. The necessity of using the combination of retarding admixtures with different action mechanism is shown. The strength in the initial hardening period is ensured by the formation of AFm-phases and ettringite, and subsequently by increasing the role of CSH.

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