抹面砂漿底層主要起以下作用：
　　The plastering mortar base mainly serves the following functions:
　　一、粘結作用
　　1、 Adhesive effect
　　底層砂漿的主要功能是確保砂漿與基層之間能夠牢固地粘結。這種粘結作用是抹面砂漿系統的關鍵，因為它能夠防止砂漿層與基層之間的分離，從而確保整個砂漿系統的穩定性和耐久性。底層砂漿通常具有良好的保水性，這有助于它與基層之間形成緊密的粘結。
　　The main function of the bottom mortar is to ensure a strong bond between the mortar and the base layer. This bonding effect is crucial for the plastering mortar system, as it prevents separation between the mortar layer and the base layer, ensuring the stability and durability of the entire mortar system. The bottom mortar usually has good water retention, which helps it form a tight bond with the base layer.
　　二、防水防潮（特定情況）
　　2、 Waterproof and moisture-proof (specific situation)
　　在需要防水或防潮的場合，底層砂漿可能會選擇使用水泥砂漿，因為水泥砂漿相較于其他類型的砂漿具有更好的防水性能。這有助于防止水分滲透到墻體內部，從而保護墻體的結構和性能。
　　In situations where waterproofing or moisture resistance is required, cement mortar may be chosen as the base mortar because it has better waterproof performance compared to other types of mortar. This helps prevent moisture from seeping into the interior of the wall, thereby protecting the structure and performance of the wall.
　　三、適應基層特性
　　3、 Adapt to grassroots characteristics
　　底層砂漿的選擇還會根據基層材料的特性和工程部位的不同而有所差異。例如，對于磚墻底層抹灰，可能會選擇使用石灰砂漿；而對于板條墻或板條頂棚的底層抹灰，則可能會選擇使用混合砂漿或石灰砂漿。這種選擇是為了確保底層砂漿能夠與基層材料形成良好的粘結，并適應不同的施工環境和要求。
　　The selection of bottom mortar will also vary depending on the characteristics of the base material and the different parts of the project. For example, for plastering the bottom layer of brick walls, lime mortar may be chosen; For the bottom plastering of Flat noodles walls or Flat noodles ceilings, mixed mortar or lime mortar may be used. This choice is to ensure that the bottom mortar can form a good bond with the base material and adapt to different construction environments and requirements.
　　綜上所述，抹面砂漿底層在抹面砂漿系統中扮演著至關重要的角色，它不僅起到了粘結基層的作用，還根據具體需求提供了防水防潮等額外功能，并適應了不同基層材料和施工環境的要求。
　　In summary, the bottom layer of the plastering mortar plays a crucial role in the plastering mortar system. It not only serves as a bonding agent for the base layer, but also provides additional functions such as waterproofing and moisture resistance according to specific needs, and adapts to the requirements of different base materials and construction environments.
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