阿利尤瑟夫·艾哈迈德,阿里·霍林

高性能自密实混凝土是建筑行业最有前途的发展之一。如今，混凝土设计师和预拌混凝土公司正在寻求在环境影响、成本、机械性能以及新鲜状态特性方面的最佳混凝土。这可以通过同时考虑上述参数来实现；通常，通过将传统混凝土系统与不同类型的高性能废矿物外加剂（即微硅粉和粉煤灰）和超高效增塑剂相结合。在本研究中，新鲜状态特性（坍落度、流动性、受限流动）、硬化状态特性（密度、浸水吸水率、抗压强度、劈裂抗拉强度、弯曲强度、应力-应变关系、弹性模量、对用废矿物掺合料制备的高性能自密实混凝土（HPSCC）进行了烘箱加热试验、耐火性和冻融循环试验）和成本检查，并与三种不同的参考混合物（包括普通强度振捣混凝土）进行了比较（NSVC）、高强自密实混凝土（HSSCC）和高性能高粘混凝土（HPVC）。然后，作者采用多参数分析方法来确定成本、可加工性、强度和耐久性方面的最佳混凝土配合比。

高性能混凝土（HPC）；自密实混凝土（SCC）；流动性；耐久性；冻融循环；防火性能

[1] Łaz ´ niewska-Piekarczyk, B. The influence of chemical admixtures on cement hydration and mixture properties of very high performance self-compacting concrete. Constr. Build. Mater. 2013, 49, 643–662. [2] Pineaud, A.; Pimienta, P.; Rémond, S.; Carre, H. Mechanical properties of high performance self-compacting concretes at room and high temperature. Constr. Build. Mater. 2016, 112, 747–755. [3] Łaz´niewska-Piekarczyk, B. Effect of viscosity type modifying admixture on porosity, compressive strength and water penetration of high performance self-compacting concrete. Constr. Build. Mater. 2013, 48, 1035–1044. [4] Farooq, F.; Rahman, S.K.U.; Akbar, A.; Khushnood, R.A.; Javed, M.F.; Alyousef, R.; Alabduljabbar, H.; Aslam, F. A comparative study on performance evaluation of hybrid GNPs/CNTs in conventional and self-compacting mortar. Alex. Eng. J. 2020, 59, 369–379.[5] Noumowé, A.; Carre, H.; Daoud, A.; Toutanji, H. High-strength self-compacting concrete exposed to fire test. J. Mater. Civ. Eng. 2006, 18, 754–758. [6] Ahmad, S.; Umar, A.; Masood, A. Properties of normal concrete, self-compacting concrete and glass fibre-reinforced self- compacting concrete: An experimental study. Procedia Eng. 2017, 173, 807–813. [7] Kang, S.-H.; Hong, S.-G.; Moon, J. Shrinkage characteristics of heat-treated ultra-high performance concrete and its mitigation using superabsorbent polymer based internal curing method. Cem. Concr. Compos. 2018, 89, 130–138. [8] Łaz´niewska-Piekarczyk, B. Investigations on the relationship between porosity and strength of admixtures modified high performance self-compacting concrete. J. Civ. Eng. Manag. 2016, 22, 520–528. [9] Wilson, M.; Kosmatka, S. Design and Control of Concrete Mixtures, 15th ed.; Portland Cement Association: Skokie, IL, USA, 2011. [10] Duran-Herrera, A.; De-León-Esquivel, J.; Bentz, D.; Valdez-Tamez, P. Self-compacting concretes using fly ash and fine limestone powder: Shrinkage and surface electrical resistivity of equivalent mortars. Constr. Build. Mater. 2019, 199, 50–62. [11] Aggarwal, P.; Siddique, R.; Aggarwal, Y.; Gupta, S.M. Self-compacting concrete-procedure for mix design. Leonardo Electron. J. Pract. Technol. 2008, 12, 15–24.

点击下载PDF