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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 2. Отображено 2.
28-04-2023 дата публикации

Method for repairing vertical reflection crack of ballastless track filling layer

Номер: CN116024853A
Автор: ZHENG XINGUO, ZHANG LIGANG, LIU JING, JIN HAO, DOU DONGBIN, LONG DONGSHENG, ZHOU JUN, CHEN XIAOLIN, PAN YONGJIAN, LI SHUMING, ZHANG XU, WU BIN, LI GUANGHUI, ZHAO YONGZHI, CAI DEGOU, XU YONGJIE, ZHANG CHI, MENG XIN, YAO JIANPING, DENG QINGSHAN, LIU ZANQUN, LOU LIANGWEI, ZHENG KEREN, LIU XIANGHUI, YU PEIYUN, LIU JIYUAN, CHE SHUXIN, YANG DEJUN, RAO YUNBING, XIANG GONGKUN, LI HONGFU, ZHANG WENDA, CAO YUANDONG, SHI YUEFENG, LI SI, ZHENG XINHUA, NIU YABIN, ZHANG YE, LI RUIFENG, SUN XUAN, LIU RUI, YE XIAOYU, SHI WENJIE, CHAI JINCHUAN, HAN ZHENGGUO, HU JIALIN, WANG WANCAI, CHEN YAN, DING WEI, GUO FEIXIANG
Принадлежит:

The invention discloses a method for repairing a vertical reflection crack of a ballastless track filling layer, which comprises the following steps of: under the condition of track plate coverage, removing a filling layer part which is corresponding to a joint cutting position and has generated a vertical reflection crack; cleaning equipment is connected with the hollow pipeline to clean the cavity and the kerfs; flexible filling materials are injected into the kerfs to form flexible filling of the kerfs; the edge of the cavity is sealed, and a pouring hole and an exhaust hole are reserved; a repairing material is poured into a cavity in the sealing edge until the exhaust hole overflows slurry so as to ensure full pouring; and after the repairing material reaches the preset strength, the sealing edge is removed, and repairing of the filling layer is completed. By means of the technical scheme, the good waterproof effect of the kerf is still achieved under the condition that the environment ...

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Номер записи: 1
20-02-2008 дата публикации

Carbon dioxide maintenance method and technology for concrete

Номер: CN0101125442A
Автор: SHI CAIJUN, ZOU QINGYAN, ZHENG KEREN, CAIJUN SHI, QINGYAN ZOU, KEREN ZHENG
Принадлежит:

The present invention discloses a carbon dioxide maintenance method and technique of concrete, which comprise: the freshly mixed concrete is molded and then the freshly mixed concrete form mould is removed; the product is placed in an environment with humidity of 35 to 70 percent for pre-maintaining at least 15 minutes, then the product pre-maintained is placed in an environment with less than -0.03MPa vacuum degree and more than 5 percent of carbon dioxide concentration for pre-maintaining at least 15 minutes to be molded. The present invention has simple technique and method, good maintenance effect, and is able to shorten effectively the maintenance cycle of concrete, brings down maintenance cost, reduces the drying shrinkage amount during the maintenance of concrete, improves the precision of casting size of concrete, and solidifies effectively the carbon dioxide, thus the method is an energy saving and environmental protection maintenance method of concrete.

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Номер записи: 2