Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Toughening method of ultrahigh-performance concrete
The invention discloses a toughening method of ultrahigh-performance concrete. According to the invention, carbon nanotubes, cellulose and zinc phosphate surface-modified steel fibers are added into raw materials of the ultrahigh-performance concrete and are uniformly mixed to obtain a mixture, and the mixture is poured along the main stress direction of a component, so fiber orientation in the ultrahigh-performance concrete component tends to the main stress direction. The carbon nanotubes and the cellulose are added, so higher tensile strength and toughness are obtained compared with concrete obtained by independently adding the carbon nanotubes or the cellulose; and a better toughening effect is obtained by adopting two fiber toughening technologies, namely steel fiber orientation and steel fiber surface modification, compared with concrete obtained by independently using one fiber toughening technology. By integrating four measures, the cracking strength of the ultrahigh-performance concrete is improved by 77.4%, the tensile strength of the ultrahigh-performance concrete is improved by 129.5%, and the peak deflection of the ultrahigh-performance concrete is improved by 113.6%,so it is indicated that the scheme obviously enhances the cracking resistance and tensile toughness of the ultrahigh-performance concrete.
本发明公开了一种超高性能混凝土的增韧方法。在超高性能混凝土的原料中添加碳纳米管、纤维素和磷酸锌表面修饰的钢纤维，混合均匀后制得混合料，将混合料按照构件主应力方向倒入，实现超高性能混凝土构件中纤维取向倾向于主应力方向。本发明添加碳纳米管、纤维素相较于单独添加碳纳米管或纤维素取得了更高的抗拉韧性，采用钢纤维定向、钢纤维表面修饰两种纤维增韧技术相较于单独使用一种纤维增韧技术取得了更好的增韧效果。综合四种措施，UHPC的抗裂强度提升了77.4％，抗拉强度提升了129.5％，峰值挠度提升了113.6％，说明该方案使得UHPC的抗裂、抗拉韧性有了显著的提升。
Toughening method of ultrahigh-performance concrete
The invention discloses a toughening method of ultrahigh-performance concrete. According to the invention, carbon nanotubes, cellulose and zinc phosphate surface-modified steel fibers are added into raw materials of the ultrahigh-performance concrete and are uniformly mixed to obtain a mixture, and the mixture is poured along the main stress direction of a component, so fiber orientation in the ultrahigh-performance concrete component tends to the main stress direction. The carbon nanotubes and the cellulose are added, so higher tensile strength and toughness are obtained compared with concrete obtained by independently adding the carbon nanotubes or the cellulose; and a better toughening effect is obtained by adopting two fiber toughening technologies, namely steel fiber orientation and steel fiber surface modification, compared with concrete obtained by independently using one fiber toughening technology. By integrating four measures, the cracking strength of the ultrahigh-performance concrete is improved by 77.4%, the tensile strength of the ultrahigh-performance concrete is improved by 129.5%, and the peak deflection of the ultrahigh-performance concrete is improved by 113.6%,so it is indicated that the scheme obviously enhances the cracking resistance and tensile toughness of the ultrahigh-performance concrete.
本发明公开了一种超高性能混凝土的增韧方法。在超高性能混凝土的原料中添加碳纳米管、纤维素和磷酸锌表面修饰的钢纤维，混合均匀后制得混合料，将混合料按照构件主应力方向倒入，实现超高性能混凝土构件中纤维取向倾向于主应力方向。本发明添加碳纳米管、纤维素相较于单独添加碳纳米管或纤维素取得了更高的抗拉韧性，采用钢纤维定向、钢纤维表面修饰两种纤维增韧技术相较于单独使用一种纤维增韧技术取得了更好的增韧效果。综合四种措施，UHPC的抗裂强度提升了77.4％，抗拉强度提升了129.5％，峰值挠度提升了113.6％，说明该方案使得UHPC的抗裂、抗拉韧性有了显著的提升。
Toughening method of ultrahigh-performance concrete
一种超高性能混凝土的增韧方法
HU ZHIMIN (Autor:in) / HUO WENBIN (Autor:in) / RAO XINPIN (Autor:in) / ZHANG YANG (Autor:in) / CHEN WEI (Autor:in) / QU SHAOQIN (Autor:in) / HUANG LONGTIAN (Autor:in) / JIN XUEFENG (Autor:in) / XIONG XUANWEI (Autor:in) / CHEN WEIPENG (Autor:in)
04.12.2020
Patent
Elektronische Ressource
Chinesisch
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