混凝土常見(jiàn)的幾種離淅現象及原因
概述:1 出料時(shí)間持續過(guò)長(cháng),且在出料時(shí)攪拌筒停止不轉,造成混凝土的離淅。1 The discharging time lasts too long, and the mixing d
1.出料時(shí)間持續過(guò)長(cháng),且在出料時(shí)攪拌筒停止不轉,造成混凝土的離淅。
1. The discharging time lasts too long, and the mixing drum stops when discharging, resulting in the separation of concrete.
2.運輸時(shí)間太長(cháng):由于自上料攪拌車(chē)運輸時(shí)間太長(cháng),混凝土因得不到有效的充分攪拌而逐漸產(chǎn)生的離淅現象。
2. Too long transportation time: due to the long transportation time from the loading mixer, the concrete is gradually separated due to the lack of effective and sufficient mixing.
3.攪拌站主機攪拌時(shí)間太短:攪拌站主機攪拌時(shí)間太短會(huì )造成混凝土中的各種物料沒(méi)有充分混合,不夠均勻;出料斷斷續續,時(shí)間過(guò)長(cháng)。
3. The mixing time of the main machine of the mixing plant is too short: the mixing time of the main machine of the mixing plant is too short, which will cause various materials in the concrete not to be fully mixed and not uniform enough; The discharge is intermittent and the time is too long.
4.裝載量超標:混凝土裝載到罐體超過(guò)攪拌容積,甚裝到攪拌筒密封管、進(jìn)料斗內,超載部分由于得不到攪拌,長(cháng)時(shí)間運輸后產(chǎn)生離淅(該情況為攪拌筒附近的離淅料先出,等離淅料出完,后續出料正常)。
4. The loading capacity exceeds the standard: the concrete loaded into the tank exceeds the mixing volume, and even loaded into the sealing pipe and feed hopper of the mixing drum. The overload part can not be mixed, resulting in separation after long-term transportation (this situation is that the separation materials near the mixing drum are discharged first, and the subsequent discharge is normal after the separation materials are discharged).
5.運輸時(shí)罐體轉速過(guò)快:由于自上料攪拌車(chē)罐體轉速過(guò)快(一般在運輸過(guò)程中混凝土攪拌車(chē)攪拌筒的轉速為3轉/分),混凝土中由于多種介質(zhì)的比重不同,轉速過(guò)快使得比重較大的顆粒與砂漿發(fā)生分離而集中在靠近罐體的部位。
5. The tank speed is too fast during transportation: because the tank speed of the self loading mixer is too fast (generally, the speed of the mixing drum of the concrete mixer is 3 RPM during transportation), the particles with large specific gravity are separated from the mortar and concentrated near the tank due to the different specific gravity of various media in the concrete.