| 水胶比对再生砖粉ECC工作性能和力学性能的影响 |
| |
| 引用本文： | 元成方,李好飞,王娣,王一光.水胶比对再生砖粉ECC工作性能和力学性能的影响[J].硅酸盐通报,2021,40(11):3723-3729. |
| |
| 作者姓名： | 元成方 李好飞 王娣 王一光 |
| |
| 作者单位： | 1.郑州大学土木工程学院,郑州 450001; 2.河南省交通规划设计研究院股份有限公司,郑州 450015 |
| |
| 基金项目： | 河南省重点研发与推广专项(202102310255);河南省交通运输科技计划项目(20200410) |
| |
| 摘 要： | 利用再生砖粉全取代石英砂制备工程用水泥基复合材料(ECC),深入研究和分析了材料的工作性能和力学性能,利用扫描电镜技术对相关机理进行了探讨。研究表明:水胶比变化范围在0.30~0.39(质量比,下同)时,再生砖粉ECC拌合物的坍落度均在200 mm以上,工作性能良好;水胶比相同的情况下,用再生砖粉取代石英砂后,ECC的力学性能有所下降;水胶比变化范围在0.30~0.37时,再生砖粉ECC的抗折强度随水胶比的增大而增大,水胶比变化范围在0.30~0.39时,再生砖粉ECC的抗压强度随水胶比的增大而减小;各组再生砖粉ECC均表现出良好的应变硬化特征,呈现多缝开裂状态,且极限应变均大于2%。在本文试验条件下,水胶比为0.37时再生砖粉ECC的弯曲性能和单轴拉伸性能最佳。
|
| 关 键 词： | 工程用水泥基复合材料 再生砖粉 再生砖粉ECC 水胶比 工作性能 力学性能 |
| 收稿时间： | 2021-04-15 |
Effect of Water-Binder Ratio on Working Performance and Mechanical Properties of Recycled Brick Powder ECC |
| |
| YUAN Chengfang,LI Haofei,WANG Di,WANG Yiguang.Effect of Water-Binder Ratio on Working Performance and Mechanical Properties of Recycled Brick Powder ECC[J].Bulletin of the Chinese Ceramic Society,2021,40(11):3723-3729. |
| |
| Authors: | YUAN Chengfang LI Haofei WANG Di WANG Yiguang |
| |
| Affiliation: | 1. School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China; 2. Henan Provincial Communications Planning & Design Institute Co., Ltd., Zhengzhou 450015, China |
| |
| Abstract: | The recycled brick powder was used to replace quartz sand to prepare engineered cementitious composites (ECC). The working performance and mechanical properties of materials were studied and analyzed, and the related mechanism was discussed by scanning electron microscopy. The research shows that when the water-binder ratio changes from 0.30 (mass ratio, the same below) to 0.39, the slump of recycled brick powder ECC mixture is above 200 mm, and the working performance is good. Under the same water-binder ratio, the mechanical properties of ECC decrease after replacing quartz sand with recycled brick powder. When the water-binder ratio ranges from 0.30 to 0.37, the flexural strength of recycled brick powder ECC increases with the increase of water-binder ratio. When the water-binder ratio ranges from 0.30 to 0.39, the compressive strength of recycled brick powder ECC decreases with the increase of water-binder ratio. The recycled brick powder ECC in each group show good strain hardening characteristics, showing multi-crack cracking state, and the ultimate strain is greater than 2%. Under the experimental conditions in this paper, the flexural and uniaxial tensile properties of 0.37 water-binder ratio recycled brick powder ECC are the best. |
| |
| Keywords: | engineered cementitious composites recycled brick powder recycled brick powder ECC water-binder ratio working performance mechanical property |
|
| 点击此处可从《硅酸盐通报》浏览原始摘要信息 |
|
点击此处可从《硅酸盐通报》下载全文 |
|
