Mayhoub Ola A, Abadel Aref A, Alharbi Yousef R, Nehdi Moncef L, de Azevedo Afonso R G, Kohail Mohamed
Department of Civil Engineering, El Gazera High Institute for Engineering and Technology, Cairo 11571, Egypt.
Department of Civil Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia.
Polymers (Basel). 2022 Jun 25;14(13):2585. doi: 10.3390/polym14132585.
The development of ultra-high-performance concrete (UHPC) is still practically limited due to the scarcity of robust mixture designs and sustainable sources of local constituent materials. This study investigates the engineering characteristics of Styrene Butadiene Rubber (SBR) polymeric fiber-reinforced UHPC with partial substitution of cement at 0, 5 and 20 wt.% with latex polymer under steam and air curing techniques. The compressive and tensile strengths along with capillary water absorption and sulfate resistance were measured to evaluate the mechanical and durability properties. Scanning Electron Microscopy (SEM) was carried out to explore the microstructure development and hydration products in the designed mixtures under different curing regimes. The results indicated that the mixtures incorporating 20 wt.% SBR polymer achieved superior compressive strength at later ages. Additionally, the tensile strength of the polymeric UHPC without steel fibers and with 20% polymers was enhanced by 50%, which promotes the development of novel UHPC mixtures in which steel fibers could be partially replaced by polymer, while enhancing the tensile properties.
由于缺乏可靠的配合比设计以及当地组成材料的可持续来源，超高性能混凝土（UHPC）的发展在实际应用中仍受到限制。本研究调查了丁苯橡胶（SBR）聚合物纤维增强UHPC在蒸汽养护和空气养护技术下，用乳胶聚合物以0、5和20 wt.%的比例部分替代水泥时的工程特性。测量了抗压强度、抗拉强度以及毛细吸水率和抗硫酸盐性，以评估其力学性能和耐久性。进行扫描电子显微镜（SEM）分析，以探究不同养护制度下设计混合物中的微观结构发展和水化产物。结果表明，掺入20 wt.% SBR聚合物的混合物在后期具有优异的抗压强度。此外，不含钢纤维且含20%聚合物的聚合物UHPC的抗拉强度提高了50%，这促进了新型UHPC混合物的发展，其中钢纤维可以部分被聚合物替代，同时提高拉伸性能。
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