火成岩纤维增强水工混凝土的抗磨蚀性能  

Wear-resistant performance of reinforcing hydraulic concrete with igneous rock fiber

作　　者：高延红[1] 朱燕东[1,2] 傅招旗[1] 吴灵杰[1] 张俊芝[1] 

机构地区：[1]浙江工业大学建筑工程学院,杭州310014 [2]中国联合工程公司第二工程建设公司,杭州310022

出　　处：《水力发电学报》2014年第5期177-186,共10页Journal of Hydroelectric Engineering

基　　金：水利部公益性行业科研专项经费(200901065);国家自然科学基金(50879079;51279181);浙江省自然科学基金(LY13E090008)

摘　　要：通过规范的抗冲磨试验、自主设计的直流式水洞抗冲试验和自然强潮河口环境的冲刷试验,对火成岩纤维及碳纤维水工混凝土的抗磨蚀性能进行了研究。结果表明,无论是火成岩纤维还是碳纤维,影响水工混凝土抗磨和抗冲性能的主要因素是纤维的体积掺量,而纤维长度对抗冲耐磨性能的影响不显著;当纤维掺量不超过0.9%的情况下,混凝土的抗磨强度随着短切纤维体积掺量的增加而增加;在相同水灰比和纤维体积掺量下,火成岩纤维对提高混凝土抗磨强度的效果优于碳纤维的,而且水灰比较小的混凝土,纤维的抗磨增强效果更加明显;短切火成岩纤维和短切碳纤维均能提高混凝土的抗冲刷性能,为增强纤维混凝土的抗冲性能,应适当延长养护时间。Based on the conventional wear-resistant tests in Chinese code and the independently designed erosion-resistance tests in a linear water tunnel and natural strong-tide estuary environment, wear-resistant performance of reinforcing hydraulic concrete with igneous rock fiber and carbon fiber are studied in this paper. Results show that fiber volume content in hydraulic concrete is the main influence factor on wear-resistant strength and erosion-resistant performance while the influence of fiber length is insignificant, no matter it is igneous fiber or carbon fiber. Wear-resistant strengths are increased with fiber content increasing in the range of no more than 0.9%. The reinforcing effect of igneous fiber on wear resistance is better than that of carbon fiber under a fixed fiber volume ratio and water-cement ratio, and it appears more obvious at lower water-cement ratio. The chopped igneous fiber and carbon fiber can both improve erosion-resistant performance of hydraulic concrete, but the concrete curing time should be longer to achieve a better reinforcing effect.

关 键 词：水工材料 增强性能 抗磨试验 火成岩纤维混凝土 抗磨强度 质量损失率 

分 类 号：TV431.3[水利工程—水工结构工程]