Jakhrani Sadam Hussain, Kim Hong Gi, Jeon In Kyu, Ryou Jae Suk
Department of Civil and Environmental Engineering, Hanyang University, Seoul 04763, Korea.
Materials (Basel). 2019 Jul 15;12(14):2269. doi: 10.3390/ma12142269.
The main purpose of this work is to study the effect of saturated black tea waste and perlite on controlling the rapid heat of hydration in high-strength cement mortars at early ages. Tea waste and perlite were investigated as internal curing agents in different mixes. Mortar specimens with two different sizes of tea waste and perlite particles with 1 and 3% by volume of cement were added in different mixes to find their effect on early age hydration. The rising interior temperature, setting times, and strength parameters were evaluated. Results showed that the mix specimens that contained 3% tea waste and perlite particles significantly delayed the hydration process by minimizing internal temperature and extended setting times of different specimens. However, their usage had a slightly adverse impact on compressive and flexural strengths. It was observed that the specimens made with coarser particles of tea waste and perlite were more helpful to control early age rapid hydration than the specimens made with finer particles, whereas the specimens made with finer particles had slightly higher strengths than the specimens made with coarser particles. Hence, the coarser particles are recommended to be used in high-strength mortars to mitigate the early age rapid heat of hydration.
这项工作的主要目的是研究饱和红茶废料和珍珠岩对控制高强度水泥砂浆早期水化热快速释放的影响。将茶废料和珍珠岩作为不同混合料中的内部养护剂进行研究。在不同混合料中加入两种不同粒径的茶废料和珍珠岩颗粒，其体积占水泥的1%和3%，以研究它们对早期水化的影响。对内部温度上升、凝结时间和强度参数进行了评估。结果表明，含有3%茶废料和珍珠岩颗粒的混合料试件通过降低内部温度显著延迟了水化过程，并延长了不同试件的凝结时间。然而，它们的使用对抗压强度和抗弯强度有轻微的不利影响。观察到，用较粗粒径的茶废料和珍珠岩制成的试件比较细粒径的试件更有助于控制早期快速水化，而用较细粒径制成的试件强度比用较粗粒径制成的试件略高。因此，建议在高强度砂浆中使用较粗颗粒以减轻早期快速水化热。
