耐磨彩色混凝土地面工程完工一段时间后成品表面出现局部脱落起粉松散

原因剖析：撒强固剂前，外表水分已干，施工时在外表洒水;撒强固剂前，泌水太多，在外表撒干灰停止吸水;强固剂在混凝土外表没有经过浸湿、搓揉等，使外表与基底凝固时，物理散布不平均。施工当中或者混凝土养护阶段，温度低于零摄氏度时，会呈现冻融而松懈。高原资料选用不当，如水泥普通要选用质量好、标号较高的水泥，否则水泥强度太低，使混凝土制品强度不够，容易发作脱粉现象;砂石资料的含泥量过高也容易招致混凝土强度太低而发作脱粉现象。水灰比过高：即水与水泥的比例太大，这会降低水泥强度，形成面层强度低，易脱粉露底。

Cause analysis: before spraying strength agent, the surface water has dried up, while spraying water on the surface during construction; before spraying strength agent, too much bleeding stops absorbing water by spraying dry ash on the surface; when the concrete surface is not wetted, rubbed and so on, the physical distribution of the strength agent is uneven when the surface and the base are solidified. During construction or concrete maintenance, when the temperature is below zero degrees Celsius, it will appear freeze-thaw and slack. Improper selection of Plateau data, such as cement with good quality and high label, or the strength of cement is too low, so that the strength of concrete products is insufficient and the phenomenon of dedusting is easy to occur; too high mud content of sand and stone data can easily lead to the phenomenon of dedusting of concrete with too low strength. Water cement ratio is too high: that is, the ratio of water to cement is too large, which will reduce the strength of cement, form a low surface strength, easy to dedusting and expose the bottom.

预防措施：严厉控制彩色混凝土施工中的各个关键环节时间。彩色混凝土施工应该防止冬季施工。严厉控制混凝土中原资料的各项指标，依照有关请求停止原资料检测检验工作，不契合请求的原资料不得运用，以保证混凝土强度。假如水灰比过高，会加强混凝土的可塑性，但会降低混凝土强度;假如水灰比拟低，会进步混凝土强度，但却降低了混凝土的可塑性。因而，只要严厉依照配合比施工，控制恰当的水灰比，才干使水泥发作正常的水化反响，既保证了混凝土的强度，又能使其具有良好的可塑性。

Preventive measures: Strictly control the time of each key link in the construction of color concrete. Coloured concrete construction should be prevented from winter construction. Strictly control the various indicators of raw materials in concrete, stop the testing and inspection of raw materials according to relevant requests, and the raw materials that do not meet the requests shall not be used to ensure the strength of concrete. If the water-cement ratio is too high, the plasticity of concrete will be strengthened, but the strength of concrete will be reduced; if the water-cement ratio is too low, the strength of concrete will be improved, but the plasticity of concrete will be reduced. Therefore, as long as the construction is strictly in accordance with the mix proportion and the appropriate water cement ratio is controlled, the normal hydration reaction of cement can occur, which not only guarantees the strength of concrete, but also makes it have good plasticity.

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