摘要
以混凝土试件的抗压强度、劈裂抗拉强度和抗折强度为评价指标,评价了聚丙烯纤维对混凝土抗硫酸盐干湿循环侵蚀性能的影响。结果表明,随着聚丙烯纤维长度的不断增大,混凝土试件在硫酸盐溶液中干湿循环60次后的抗压强度、劈裂抗拉强度和抗折强度值均呈现出先增大后减小的趋势,聚丙烯纤维长度为16mm时,力学性能最好;当纤维的长度相同时,随着纤维掺量的增大,混凝土试件的抗压强度、劈裂抗拉强度和抗折强度值均是先增大后减小,纤维的掺量为2kg·m^(-3)时,其抗压强度、劈裂抗拉强度和抗折强度值均可以达到最大。研究结果认为,聚丙烯纤维的掺入能够有效提高混凝土试件的抗硫酸盐侵蚀能力,选择聚丙烯纤维的长度为16mm,掺量为2kg·m^(-3),此时,混凝土试件的各项力学性能均可以达到最佳。
Taking the compressive strength,splitting tensile strength and flexural strength of concrete specimens as evaluation indexes,the effect of polypropylene fiber on the sulfate dry wet cycle corrosion resistance of concrete was evaluated.The results show that with the continuous increase of the length of polypropylene fiber,the compressive strength,splitting tensile strength and flexural strength of concrete specimens after 60 dry and wet cycles in sulfate solution increase first and then decrease.When the length of polypropylene fiber is 16mm,the mechanical properties are the best;When the fiber length is the same,with the increase of fiber content,the compressive strength,splitting tensile strength and flexural strength of concrete specimens first increase and then decrease.When the fiber content is 2kg·m^(-3),the compressive strength,splitting tensile strength and flexural strength can reach the maximum.The results showed that the addition of polypropylene fiber can effectively improve the sulfate resistance of concrete specimens.When the length of polypropylene fiber is 16mm and the content is 2kg·m^(-3),the mechanical properties of concrete specimens can reach the best.
作者
冯屾
FENG Shen(Department of Civil and Traffic Engineering,Yellow River Conservancy Technical Institute,Kaifeng 475004,China)
出处
《化学工程师》
CAS
2022年第9期97-100,共4页
Chemical Engineer
基金
河南省高等学校重点科研项目计划(21A560009)。
