全文获取类型
收费全文 | 296篇 |
免费 | 15篇 |
专业分类
电工技术 | 3篇 |
综合类 | 1篇 |
化学工业 | 57篇 |
金属工艺 | 10篇 |
机械仪表 | 8篇 |
建筑科学 | 15篇 |
能源动力 | 10篇 |
轻工业 | 53篇 |
水利工程 | 1篇 |
石油天然气 | 1篇 |
无线电 | 17篇 |
一般工业技术 | 38篇 |
冶金工业 | 22篇 |
原子能技术 | 4篇 |
自动化技术 | 71篇 |
出版年
2024年 | 2篇 |
2023年 | 4篇 |
2022年 | 4篇 |
2021年 | 3篇 |
2020年 | 11篇 |
2019年 | 10篇 |
2018年 | 16篇 |
2017年 | 19篇 |
2016年 | 18篇 |
2015年 | 6篇 |
2014年 | 15篇 |
2013年 | 39篇 |
2012年 | 18篇 |
2011年 | 21篇 |
2010年 | 13篇 |
2009年 | 18篇 |
2008年 | 13篇 |
2007年 | 19篇 |
2006年 | 3篇 |
2005年 | 5篇 |
2004年 | 9篇 |
2003年 | 7篇 |
2002年 | 7篇 |
2001年 | 1篇 |
2000年 | 4篇 |
1999年 | 3篇 |
1998年 | 5篇 |
1997年 | 4篇 |
1996年 | 4篇 |
1993年 | 2篇 |
1991年 | 3篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1986年 | 1篇 |
1984年 | 1篇 |
排序方式: 共有311条查询结果,搜索用时 0 毫秒
311.
Glass fiber‐reinforced polymer (GFRP) materials have received a great deal of interest among civil engineers during the past decade. This paper presents an overview of experimental studies carried out on GFRP‐wrapped and epoxy‐injected concrete samples exposed to elevated temperatures. For this purpose, 0.30, 0.35 and 0.40 water to binder (w/b) ratios were used. For each w/b ratio, normal aggregates were replaced by lightweight aggregates with a size fraction of 0–2 mm at three different volume fractions such as 10%, 20% and 30% of total aggregate volume. At the same time, a group of air‐entrained samples was also cast for each w/b ratios. Prepared samples were exposed to 600 °C for 3 h. The damaged samples were separately repaired by GFRP and epoxy injection. Before and after elevated temperature exposure, water absorption and compressive strength were tested. After repairing with GFRP and epoxy injection, only the compressive strength test was carried out. GFRP improved the compressive strength between 1–22% and 348–1403% for samples before and after being exposed to elevated temperatures, respectively. Epoxy injection increased the compressive strength of the samples, exposed to elevated temperature, between 1% and 123%. However, the epoxy injection process failed to recover the compressive strength of the samples before elevated temperature exposure. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献