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    地坪漆施工前混凝土起灰起砂的解决办法

    2018-10-23 08:30:14 无锡盛发地坪科技有限公司 阅读

    混凝土结构建筑物的地面或者墙面在施工完成和应用一段时间后,有些工程会出现起灰、起砂的现象。这样的起灰、起砂问题是目前混凝土常见的工程弊病,出现这种起灰、起砂问题会直接影响环氧地坪漆的施工效果。引起起灰、起砂问题的原因有两种:

    After the construction and application of the ground or wall of the concrete structure building for a period of time, some projects will appear the phenomenon of ash and sand. Such problems of ash and sand are common engineering drawbacks of concrete at present. The appearance of such problems will directly affect the construction effect of floor paint. There are two reasons for causing ash and sand problems.

    第一:在正常使用的条件下混凝土的磨损破坏。

    First: wear and tear of concrete under normal use conditions.

    第二:混凝土本身的原因,业内称为“病态混凝土的起灰、起砂”。

    Second: the cause of concrete itself, the industry called "sick concrete ash and sand."

    正常使用条件下的起灰、起砂现象,一般出现的机率较低,只有经历很长时间后才会出现明显的损坏,这种损坏属于材料正常使用的正常损坏。而病态混 凝土的起灰、起砂不同于混凝土正常使用条件下的磨损破坏,它是在混凝土施工未启用之前即表现出了严重的结合强度不足和耐磨性差的问题。有资料和工程实践表 明,建筑物出现的病态起灰、起砂与混凝土的抗压强度没有直接的关系,与混凝土的粘结强度密切相关。

    Under normal use conditions, the occurrence of ash, sand phenomenon is generally low, only after a long time will appear obvious damage, this damage belongs to the normal use of materials damage. The ashing and sanding of morbid concrete are different from the wear and tear of concrete under normal service conditions. It shows serious problems of insufficient bonding strength and poor wear resistance before concrete construction is started. Some data and engineering practice show that there is no direct relationship between the morbid ash and sand formation of buildings and the compressive strength of concrete, and it is closely related to the bond strength of concrete.

    解决病态混凝土的起灰、起砂措施和方法:

    Measures and methods to solve the problem of ash and sand from sick concrete.

    第一:对已经出现地面起灰、起砂的混凝土进行处理和治理,通过物理方法为主进行补救:采用薄层材料进行弥补。例如施工一层2~3毫米的自流平水泥,采用聚合物改性的腻子刮施、环氧等树脂材料修补。由于病态混凝土的粘结强度很低,两种材料的结合界面很容易分离,造成起皮等新问题;在不影响道路和建筑物的标高下,加铺一层水泥基材料,如自流平水泥、细石混凝土等。这实际是一种补救措施,问题严重的可能需要除去原有的混凝土,重新浇注混凝土。

    Firstly, the concrete which has been dusted and sanded is treated and remedied mainly by physical method: thin layer material is used to make up for it. For example, a layer of 2-3 mm self-leveling cement is constructed and repaired with polymer modified putty scraping and epoxy resin. Because the bond strength of morbid concrete is very low, the bond interface between the two materials is easy to be separated, resulting in new problems such as peeling; without affecting the elevation of roads and buildings, a layer of cement-based materials, such as self-leveling cement, fine aggregate concrete, etc. This is actually a remedy, a serious problem may need to remove the original concrete, re-pouring concrete.

    第二:在水泥基材料未成型之前采取预防措施,包括加强对水泥基材料原材料的控制、物料的配合比设计、施工作业规范化管理,以及加强过程控制,加强混凝土养护,避免环境对质量的影响等等。这些方法均为预防性措施,既便如此,水泥基材料的起灰、起砂现象仍时有发生。

    Secondly, precautions should be taken before the cement-based materials are formed, including strengthening the control of raw materials, material mix design, standardized management of construction operations, strengthening process control, strengthening concrete maintenance and avoiding environmental impact on quality. These methods are preventive measures, even so, the cement-based materials of ash, sand phenomenon still occurs from time to time. 


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