Fresh and hardened properties of portland cement-slag concrete activated using the by-product of the liquid crystal display manufacturing process
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- Fresh and hardened properties of portland cement-slag concrete activated using the by-product of the liquid crystal display manufacturing process
- Choi, Sung; Pyo, Sukhoon
- Issue Date
- MDPI AG
- MATERIALS, v.13, no.19, pp.1 - 15
- This experimental research investigated the applicability of the liquid crystal display (LCD) by-product of the refining process as a sustainable and alternative alkali activator for ground granulated blast-furnace slag (GGBFS) blended cement concrete. Three levels of binder replacement using the industrial by-product, and four water/binder ratios were considered in order to evaluate the effects of the replacement in fresh and hardened properties of the blended concrete. XRD and TG analyses confirmed that the by-product that contains abundant alkali compounds promotes the reactivity of GGBFS. The test results indicated that the incorporation of the by-product results in delayed setting and degraded workability due to the highly porous nature of the by-product, yet shows rapid early-age strength development of the blended concrete as conventional alkaline activators for GGBFS. These characteristics shed light on a simple yet effective and practical means of reusing the industrial by-product as an alternative alkaline activator. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
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