環(huán)氧地坪漆基層的檢查與預(yù)處理方法
基層是環(huán)氧地坪漆涂料的基礎(chǔ),要進(jìn)行詳細(xì)檢查與分析,以確定其處理措施。(1)測(cè)量抗壓強(qiáng)度。工業(yè)環(huán)氧地坪漆的抗壓強(qiáng)度不應(yīng)低于24MPa,為滿足某些承重要求,還可能需要更高的強(qiáng)度,應(yīng)使用回彈儀進(jìn)行強(qiáng)度測(cè)量,或取芯塊實(shí)測(cè)抗壓強(qiáng)度。
The base layer is the basis of epoxy floor paint. Detailed inspection and analysis are needed to determine the treatment measures. (1) measuring compressive strength. The compressive strength of industrial epoxy floor paint should not be less than 24 MPa. In order to meet some important requirements, it may need higher strength, it is necessary to use rebound meter to measure the strength, or take core to measure the compressive strength.
(2)確定黏結(jié)強(qiáng)度?;炷粱鶎颖砻鎺缀撩缀穸葍?nèi)通常是水泥漿形成的低強(qiáng)度層。因水泥水化反應(yīng)導(dǎo)致的收縮,溫度變化或荷載的反復(fù)作用等產(chǎn)生的應(yīng)力,會(huì)導(dǎo)致黏結(jié)強(qiáng)度降低。黏結(jié)強(qiáng)度不應(yīng)低于1.5MPa。
(2) determine bond strength. The surface of concrete base is usually a low strength layer formed by cement slurry within a few millimeters of thickness. The stress caused by shrinkage, temperature change or repeated action of load caused by hydration reaction of cement will lead to the decrease of bond strength. Bonding strength should not be lower than 1.5MPa.
(3)基層含水率。只有在水泥基層含水率不大于6%的情況下才能進(jìn)行涂料的施工,所以含水率的測(cè)量尤為重要。確定基層含水率的最佳方法是塑料薄膜覆蓋實(shí)驗(yàn)法,即將至少1mX1m的聚乙烯薄膜用膠帶封粘在混凝土面上,待至少24小時(shí)后,根據(jù)塑料薄膜上出現(xiàn)冷凝水的數(shù)量確定含水率。
(3) moisture content at the basic level. Only when the moisture content of cement base is not more than 6%, can the coating be applied, so the measurement of moisture content is particularly important. The best method to determine the moisture content of the base course is the plastic film covering experiment method, that is, at least 1mX1m polyethylene film is sealed on the concrete surface with tape, and after at least 24 hours, the moisture content is determined according to the amount of condensate water appearing on the plastic film.
(4)環(huán)境溫度。忽略施工環(huán)境溫度因素可導(dǎo)致環(huán)氧地坪漆的質(zhì)量缺陷,例如黏結(jié)強(qiáng)度降低、水印、空洞、不規(guī)則表面及硬化不兗分等。因此,對(duì)于環(huán)境溫度(氣溫)、基層表面的溫度、露點(diǎn)溫度等數(shù)所數(shù)據(jù),在施工中必須每天測(cè)量數(shù)次。
(4) ambient temperature. Ignoring the temperature factors of construction environment can lead to quality defects of epoxy floor paint, such as lower bond strength, watermarking, voids, irregular surface and hardening. Therefore, the environmental temperature (air temperature), the surface temperature of the base, dew point temperature and other data must be measured several times a day in the construction.
(5)基層清理。對(duì)于油脂、機(jī)油或有機(jī)酸、無機(jī)酸或水泥漿所引起的污染,如果不進(jìn)行徹底清除,將影響環(huán)氧地坪漆涂料層的黏結(jié)性能。因此地,必須用機(jī)械方法清理表面,并通過測(cè)定黏結(jié)強(qiáng)度進(jìn)行檢查
(5) grass-roots clean-up. For oil, oil or organic acid, inorganic acid or cement slurry pollution, if not thoroughly removed, will affect the bonding performance of epoxy floor paint coating. Therefore, the surface must be cleaned by mechanical means and checked by measuring the bond strength.
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