Abstract Fly ash is becoming a common replacement for cement in concrete. Not only does it reduce CO2 emissions, but it is cost effective and often times improves various fresh and hardened properties of concrete. Currently, Fly ash isn't replaced in percentages greater than 25–35% in structural applications because of the delayed concrete setting time. This study presents an experimental investigation to evaluate the performance of mortar mixtures incorporating up to 70% cement replacement with Fly ash under the effect of accelerated curing. Different accelerated curing regimes were investigated in terms of the preset time, curing temperature, and curing time. Fresh and hardened properties of HVFA mortar mixtures were obtained for three replacement level and their results were compared at different ages. The accelerated curing regimes successfully developed high early-age strength mixtures that can be used in the precast industry. Some curing regimes revealed the ability to reduce energy as well as curing time.

中文翻译：

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加速固化制度对预制制造厂中大量粉煤灰混合物的影响

摘要 粉煤灰正成为混凝土中水泥的常见替代品。它不仅减少了二氧化碳排放，而且具有成本效益，并且通常可以改善混凝土的各种新鲜和硬化特性。目前，由于混凝土凝结时间延迟，粉煤灰在结构应用中的替代率不会超过 25-35%。本研究提出了一项实验研究，以评估在加速固化的影响下，将高达 70% 的水泥替换为粉煤灰的砂浆混合物的性能。在预设时间、固化温度和固化时间方面研究了不同的加速固化方案。HVFA 砂浆混合物的新鲜和硬化性能在三个更换水平下获得，并在不同年龄下比较它们的结果。加速固化方案成功开发了可用于预制行业的高早期强度混合物。一些固化方案揭示了减少能量和固化时间的能力。