苏州混凝土水泥制品研究院有限公司

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发布时间:2020-01-06 00:00:00
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生态型超高强混凝土的制备与性能研究
Research on Preparation and Performance of Ecological Ultra-high Strength Concrete (UHSC)
2018年第1期
超高强混凝土(UHSC);最紧密堆积;环境影响;粉煤灰;矿粉;礁石粉;流变性能;浆体
Ultra-High Strength Concrete(UHSC); Optimized particle packing; Environmental impacts; Fly ash; Slag; Coral powders; Rheological
2018年第1期
1000-4637(2018)01-01-06
国家科技支撑计划资助(2014BAC01B02)
张志豪1,2,余 睿2,水中和2,王鑫鹏2,曾志军3,潘跃进3
1.中铁大桥科学研究院有限公司,武汉 430034;2.武汉理工大学硅酸盐建筑材料 国家重点实验室,43007;3.海军工程设计研究院,北京 100070

张志豪1,2,余 睿2,水中和2,王鑫鹏2,曾志军3,潘跃进3

张志豪,余睿,水中和,等.生态型超高强混凝土的制备与性能研究[J].混凝土与水泥制品,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.

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摘 要:通过最紧密堆积理论设计了生态型超高强混凝土(UHSC),研究了粉煤灰、矿粉以及礁石粉对UHSC流变性能、抗压强度以及水化过程的影响,并对其环境影响进行了评价。结果表明,相比之下,矿粉的加入能够降低UHSC浆体的屈服应力与塑性黏度,提高UHSC的流动度,塑性黏度最低降到3.04Pa·s,UHSC流动度增加到304mm;矿粉对UHSC的早期和后期抗压强度提高较明显,分别提高了14.4%、10%,而粉煤灰、礁石粉会降低UHSC的早期强度;矿粉、粉煤灰以及礁石粉会延缓UHSC的水化反应过程,降低72h的水化放热总量,且降低UHSC对环境的影响。结合紧密堆积理论,采用辅助胶凝材料部分取代水泥、选择较低的减水剂掺量(2.5%)的方法可以制备出生态型超高强混凝土。 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.
英文名 : Research on Preparation and Performance of Ecological Ultra-high Strength Concrete (UHSC)
刊期 : 2018年第1期
关键词 : 超高强混凝土(UHSC);最紧密堆积;环境影响;粉煤灰;矿粉;礁石粉;流变性能;浆体
Key words : Ultra-High Strength Concrete(UHSC); Optimized particle packing; Environmental impacts; Fly ash; Slag; Coral powders; Rheological
刊期 : 2018年第1期
DOI :
文章编号 : 1000-4637(2018)01-01-06
基金项目 : 国家科技支撑计划资助(2014BAC01B02)
作者 : 张志豪1,2,余 睿2,水中和2,王鑫鹏2,曾志军3,潘跃进3
单位 : 1.中铁大桥科学研究院有限公司,武汉 430034;2.武汉理工大学硅酸盐建筑材料 国家重点实验室,43007;3.海军工程设计研究院,北京 100070

张志豪1,2,余 睿2,水中和2,王鑫鹏2,曾志军3,潘跃进3

张志豪,余睿,水中和,等.生态型超高强混凝土的制备与性能研究[J].混凝土与水泥制品,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.

摘要
参数
结论
参考文献
引用本文

摘   要:通过最紧密堆积理论设计了生态型超高强混凝土(UHSC),研究了粉煤灰、矿粉以及礁石粉对UHSC流变性能、抗压强度以及水化过程的影响,并对其环境影响进行了评价。结果表明,相比之下,矿粉的加入能够降低UHSC浆体的屈服应力与塑性黏度,提高UHSC的流动度,塑性黏度最低降到3.04Pa·s,UHSC流动度增加到304mm;矿粉对UHSC的早期和后期抗压强度提高较明显,分别提高了14.4%、10%,而粉煤灰、礁石粉会降低UHSC的早期强度;矿粉、粉煤灰以及礁石粉会延缓UHSC的水化反应过程,降低72h的水化放热总量,且降低UHSC对环境的影响。结合紧密堆积理论,采用辅助胶凝材料部分取代水泥、选择较低的减水剂掺量(2.5%)的方法可以制备出生态型超高强混凝土。
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.

关键词:
超高强混凝土(UHSC);最紧密堆积;环境影响;粉煤灰;矿粉;礁石粉;流变性能;浆体
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(1)相比之下,矿粉的加入会降低UHSC浆体的屈服应力与塑性黏度,塑性黏度最小为3.04Pa·s,且UHSC的流动度有所增加,而粉煤灰的加入会增大UHSC浆体的屈服应力与塑性黏度。
(2)矿粉、粉煤灰以及礁石粉的加入对UHSC水化过程的影响趋势相似,会推迟浆体水化放热峰值的时间,水化放热峰值明显降低,浆体72h的水化放热总量降低,且会降低UHSC中的氢氧化钙含量;矿粉对UHSC的早期和后期抗压强度提高较明显,分别提高14.4%、10%。
(3)粉煤灰、矿粉以及礁石粉的加入可以显著降低UHSC对环境的影响,本文通过紧密堆积理论与辅助胶凝材料部分取代水泥设计的UHSC,在保证工作性能和力学性能良好的前提下能有效减少对环境的影响,从而实现混凝土材料的生态环保。
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张志豪,余睿,水中和,.生态型超高强混凝土的制备与性能研究[J].混凝土与水泥制品,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.

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