摘要：喷涂料免支模、施工快，是停炉检修的利器。讲回弹率控制、分层厚度、修整与烘烤。
Abstract: Shotcrete needs no formwork and goes in fast. On rebound control, layer thickness, trimming and dry-out.
正文： 停炉检修窗口按小时算，喷涂料的价值就在快。但快不等于糙，回弹不控制，修的是炉子还是墙皮都难说。
Main text: Outage windows are counted in hours; that is shotcrete’s value. Fast is not sloppy — uncontrolled rebound makes a mess, not a repair.
一、回弹率压到15%以内
1. Keep rebound under 15%
喷嘴距离0.8到1.2米，风压水量匹配，回弹率压到15%以内。距离近了料堆，距离远了打不实。
Nozzle at 0.8–1.2 m with matched air and water keeps rebound under 15%. Too close piles material; too far never compacts.
二、分层喷涂每层50毫米
2. Layer by layer, 50 mm max
一次喷太厚会塌落，分区分层，每层不超过50毫米，前一层硬化前接下一层。
Overthick layers slump. Split zones, cap each pass at 50 mm, and catch the next layer before the prior one hardens fully.
三、蜂窝夹层当场修
3. Trim honeycombs on the spot
喷完立刻刮平修整，蜂窝夹层趁湿处理。干了再修就是两块皮贴一块。
Screed right after spraying; fix honeycombs while wet. Once dry, you are gluing skin onto skin.
- 回弹率是喷涂质量的第一指标。
Rebound rate is the first quality metric of shotcrete. - 分层厚度守不住，一切白干。
If layer thickness slips, everything else is wasted. - 修复区域也要按制度烘烤，别直接点炉。
Repairs follow the dry-out schedule too — never fire straight up.
喷涂修复拼的是手感和节奏，枪手的水平直接写进炉衬寿命里。
Shotcrete repair is feel and rhythm; the operator’s skill is written into lining life.
