- 張志豪1,2，余 睿2，水中和2，王鑫鵬2，曾志軍3，潘躍進3
２０18年第1期
摘要
引用本文
摘 要：通過最緊密堆積理論設計了生態型超高強混凝土（UHSC），研究了粉煤灰、礦粉以及礁石粉對UHSC流變性能、抗壓強度以及水化過程的影響，并對其環境影響進行了評價。結果表明，相比之下，礦粉的加入能夠降低UHSC漿體的屈服應力與塑性黏度，提高UHSC的流動度，塑性黏度最低降到3.04Pa·s，UHSC流動度增加到304mm；礦粉對UHSC的早期和后期抗壓強度提高較明顯，分別提高了14.4%、10%，而粉煤灰、礁石粉會降低UHSC的早期強度；礦粉、粉煤灰以及礁石粉會延緩UHSC的水化反應過程，降低72h的水化放熱總量，且降低UHSC對環境的影響。結合緊密堆積理論，采用輔助膠凝材料部分取代水泥、選擇較低的減水劑摻量（2.5%）的方法可以制備出生態型超高強混凝土。
Abstract：An eco-friendly Ultra-High Strength Concrete（UHSC） is prepared based on the optimized particle packing model. The effects of fly ash, slag and coral powders on the rheological properties, compressive strength and hydration process of UHSC are studied, and the impacts of UHSC on the environmental is evaluated. The results show that the addition of slag can reduce the yield stress and plastic viscosity of UHSC, the minimum value of plastic viscosity can achieve 3.04Pa·s, and it can increase slump flow diameter of UHSC to 304mm; In contrast with reference mixtures, the designed UHSC with slag have higher early and later compressive strength, increased by 14.4%, 10% respectively, while mixtures with fly ash and coral powders have obvious decline in early strength development. The addition of slag, fly ash and coral powders can significantly delay the UHSC hydration reaction and reduce the total amount of hydration heat in 72hours, Moreover, the ecological evaluation demonstrates that the designed UHSC with slag, fly ash and coral powders has relatively low environmental impact. Combined with the optimized particle packing model, the auxiliary cementitious material partially replaces the cement and the relatively low dosages of superplasticizer（2.5%） can produce the ecological ultra high strength concrete.
張志豪,余睿,水中和,等.生態型超高強混凝土的制備與性能研究[J].混凝土與水泥制品,2018(1):1-5+16.
ZHANG Z H,YU R,SHUI Z H,et al.Research on Preparation and Performance of Ecological Ultra-high Strength Concrete (UHSC)[J].China Concrete and Cement Products,2018(1):1-5+16.
