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为满足Fpccp管生产及施工的需要,围绕水胶比、外加剂的掺量及蒸养参数(静养时间、升温速度、恒温时间、恒温温度及降温时间)等对C40早强混凝土脱模强度的影响因素进行了系统的试验研究,得到了满足“6h脱模强度不低于20MPa”的早强混凝土配合比(水胶比0.34、减水剂掺量1.1%、速凝剂掺量1.8%)及蒸养制度(静养时间10～30min、升温速度20～22℃/h、恒温时间120～180min、恒温温度65℃、降温时间10～40min).可加快模具周转速度,缩短生产周期,提高生产效率,节约生产成本,为Fpccp管生产及施工提供理论依据和技术支撑.
In order to meet the need of Fpccp pipe production and construction, the strength of C40 early-strength concrete was studied around the water-cement ratio, admixture dosage and steam-curing parameters (static rest time, heating speed, constant temperature time, constant temperature and cooling time) The influencing factors were systematically studied and the results showed that the mix ratio of early strength concrete (“water-binder ratio 0.34, water-reducing admixture 1.1%, quick-setting admixture 1.8”) satisfying “6h demoulding strength of not less than 20MPa” %) And steam curing system (resting time 10 ~ 30min, heating rate 20 ~ 22 ℃ / h, constant temperature time 120 ~ 180min, constant temperature 65 ℃, cooling time 10 ~ 40min.) Can speed up the mold turnover speed, shorten the production cycle, Improve production efficiency, save production costs, provide theoretical basis and technical support for Fpccp pipe production and construction.