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    环氧地坪施工第一步之基面处理

    2018-11-07 11:02:35 无锡盛发地坪科技有限公司 阅读

    地面情况与环氧地坪工程质量有很大关系,基面处理是环氧地坪工程重要一环。对施工基面进行详细的检查与分折,对确定施工基面的处理方法极为重要,它关系到涂装层能否牢固附着于地面、涂装层是否平整光亮的问题;为保证涂层和施工基面之间的粘接是持久的,要求基面干燥、结实并且干净,没有残留物和其它污染物。环氧地坪表面状况不同,环氧砂浆与地面粘结强度就会存在很大差别。

    The ground condition is closely related to the quality of the floor project. The base surface treatment is an important part of the epoxy floor project. Detailed inspection and folding of construction base surface is very important to determine the treatment method of construction base surface, which relates to whether the coating layer can firmly adhere to the ground and whether the coating layer is smooth and bright. In order to ensure that the bonding between the coating and construction base surface is durable, it requires that the base surface be dry, firm and clean, without any. Residues and other pollutants. The bonding strength of the epoxy mortar and the ground will vary greatly depending on the surface condition of the floor.

    这些差别主要表现在以下几个方面:表面粗糙化处理可显著提高粘结强度;同时,混凝土含水率越高粘结强度越低。为了做好基面处理,首先要测量抗压强度。工业地坪的抗压强度不应低于25N/mm2(3500psi),为满足某些承重要求还可能需要更高的强度,可使用反弹仪做多个点的测量,或者最好取芯块样品对其抗压强度进行实测,确定粘接强度。

    These differences are mainly manifested in the following aspects: surface roughening treatment can significantly improve the bond strength; at the same time, the higher the moisture content of concrete, the lower the bond strength. In order to do well the base surface treatment, the compressive strength must be measured first. The compressive strength of industrial floors should not be less than 25N/mm2 (3500psi). In order to meet some important requirements, higher strength may be needed. The rebound meter can be used to measure the compressive strength of industrial floors at multiple points, or it is better to take core samples to measure the compressive strength and determine the bonding strength.

    混凝土基面在其表面几个毫米厚度内,通常是水泥浆形成的低强度层,温度的改变或者反复承重而产生应力,会导致粘接强度降低,因此粘接强度最低不应小于1.5N/mm2(210psi)。

    The concrete base is usually a low strength layer formed by cement slurry within several millimeter thickness of its surface. The change of temperature or repeated load-bearing will lead to the decrease of bond strength. Therefore, the minimum bond strength should not be less than 1.5N/mm2 (210psi).

    基面潮湿度的测定也不能忽视,因为水泥基面只有在其潮湿度不大于6%的程度时才能施工。

    The determination of base moisture can not be neglected, because cement base can only be constructed when its humidity is not more than 6%.

    在测量潮湿度时,可采用“橡皮垫实验”,将至少1m×1m的聚乙烯薄膜用胶带粘在混凝土面上,24小时后拿开,这样就确定了冷凝水的数量。气侯环境同样十分重要,忽略气侯因素可导致地板的严重缺陷,例如粘接强度不够、水印、空洞、不规则表面、硬化不充分。因此以下数据在施工中每天必须测量数次:环境温度(气温)、施工基面的温度、露点。最后进行准备与清理,由油脂、机油或有机/无机酸/或水泥表层所引起的污染,如果不完全除去,将影响完成后地板的粘结性能。因此须用机械方法清理表面,直到结实的里层,并通过测定粘接强度进行检查。

    When measuring humidity, "rubber pad experiment" can be used to glue at least 1m *1m polyethylene film onto concrete surface with tape and remove it 24 hours later, so as to determine the amount of condensate. Climate environment is also very important, ignoring climate factors can lead to serious defects of the floor, such as insufficient bonding strength, watermarking, voids, irregular surfaces, inadequate hardening. Therefore, the following data must be measured several times a day in construction: ambient temperature (temperature), temperature of construction base, dew point. Finally, preparation and cleaning will affect the bonding performance of the finished floor if the pollution caused by grease, oil or organic/inorganic acid/cement surface is not completely removed. Therefore, the surface must be mechanically cleaned up to a solid inner layer and checked by measuring the bonding strength. 


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