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本试验利用超细粉煤灰的优良物理性能,采用多种胶材体系配制超细粉煤灰混凝土,并研究其力学特征及水化特性。结果表明:超细粉煤灰具有需水量低,水化活性较普通粉煤灰高的特性。在保持减水剂掺量不变、混凝土工作性能相一致的条件下,超细粉煤灰掺量提高时,混凝土的单方用水量减小,早期强度变化不规律不明显,后期强度逐渐增高。与矿粉、粉煤灰混用的三种胶材体系中,超细粉煤灰掺量较高时更能体现出其水化活性优势。混凝土硬化照片表明,与矿粉混用的体系水
This experiment made use of the excellent physical properties of ultra-fine fly ash, using a variety of plastic materials system preparation of ultra-fine fly ash concrete, and study its mechanical characteristics and hydration characteristics. The results show that ultrafine fly ash has the characteristics of low water requirement and high hydration activity compared with ordinary fly ash. Under the condition that the content of superplasticizer is the same and the working performance of concrete is consistent, when the content of ultrafine fly ash increases, the unilateral water consumption of concrete decreases, the irregularity of early strength is not obvious, and the strength of late stage is gradually increased. In the three kinds of rubber materials mixed with mineral powder and fly ash, the superiority of hydration activity can be reflected more when the content of ultrafine fly ash is higher. Concrete hardening photos show that the system mixed with mineral water