混掺纤维对再生橡胶混凝土抗冻融性能影响研究  

Research on the Influence of Hybrid Fibers on the Freeze-thaw Resistance of Recycled Rubber Concrete

作　　者：李钢粮 黎晓辉 周振 李海燕 蔡善明 刘锋[2] LI Gangliang;LI Xiaohui;ZHOU Zhen;LI Haiyan;CAI Shanming;LIU Feng(、Guangdong Yonghe Construction Group Co.,Ltd.Guangzhou 510330,China;、Guangdong University of Technology Guangzhou 510006,China)

机构地区：[1]广东永和建设集团有限公司,广州510330 [2]广东工业大学,广州510006

出　　处：《广东土木与建筑》2024年第10期100-103,共4页Guangdong Architecture Civil Engineering

基　　金：国家自然科学基金面上项目(12072080)。

摘　　要：再生橡胶混凝土作为一种绿色环保的新型建筑材料,通常被用于道路。在寒冷地区,抗冻融性能是路面结构重要的评价指标。文章采用不同的纤维掺入方式,研究了冻融循环作用下橡胶混凝土质量损失率和相对动弹模的变化规律。结果表明,单掺玻璃纤维(GF)能有效地减轻冻融循环作用下混凝土表面的侵蚀情况,质量损失率更小。钢纤维(SF)比GF更有效地减缓相对动弹模的下降速率。在150次冻融循环后,混掺纤维取得最大的相对动弹模。建立冻融损伤模型,预测冻融损伤的发展趋势,混掺纤维比单掺纤维能更好地提高混凝土的抗冻融性能。As a green and environmentally friendly building material,recycled rubber concrete is usually used for highway.In cold re‐gions,freeze-thaw resistance is an important evaluation index for highway structure.The changes in the mass loss rate and relative dynamic elastic modulus of rubber concrete under freeze-thaw cycles were studied using different fiber blending methods.The results show that single addition of glass fiber(GF)can effectively reduce the erosion of concrete surface under freeze-thaw cycles,and the mass loss rate is small‐er.Steel fiber(SF)is more effective in slowing down the descent rate of relative dynamic elastic modulus than GF.After 150 freeze-thaw cycles,the hybrid fibers achieved the maximum relative dynamic elastic modulus.Establish a freeze-thaw damage model to predict the devel‐opment trend of freeze-thaw damage.Hybrid fibers can better improve the freeze-thaw resistance of concrete than adding fibers single.

关 键 词：冻融循环 混掺纤维 再生橡胶混凝土 质量损失 相对动弹模 

分 类 号：TU528.572[建筑科学—建筑技术科学]