在济南，不少业主装修时都会遇到这样的困扰：新房墙面、卫生间墙面刚粉刷完，用手轻轻一划，沙子就簌簌往下掉，用空鼓锤轻敲，甚至会出现大面积浮砂脱落的情况。据济南本地装修质量检测数据显示，此类抹面砂浆起砂问题在新建住宅、老房翻新中发生率高达42%，其中厨房、卫生间等潮湿区域因基层强度不足，后续贴砖后瓷砖脱落的风险更是攀升至68%，给业主带来极大的安全隐患和返工成本。

　　In Jinan, many homeowners encounter this problem when decorating: just after painting the walls of their new houses and bathrooms, with a gentle swipe of their hand, sand will fall down, and with a drumming hammer, there may even be large areas of floating sand falling off. According to local decoration quality inspection data in Jinan, the occurrence rate of sanding in such plastering mortar is as high as 42% in new residential buildings and old house renovations. In damp areas such as kitchens and bathrooms, due to insufficient base strength, the risk of ceramic tiles falling off after subsequent tiling has risen to 68%, bringing great safety hazards and rework costs to homeowners.

　　很多济南业主面对墙面起砂，第一反应是网购固沙剂喷涂处理，试图通过简单操作解决问题，但不少人忽略了核心痛点：抹面砂浆起砂的根源的是基层本身存在缺陷，而非表面浮砂问题。结合现场施工经验及《建筑抹灰砂浆技术规程》要求，济南家庭墙面起砂掉沙，主要源于两大核心原因：一是砂浆配合比失衡，施工时水泥用量不足、砂粒含泥量超标（超过3%）或水灰比失控，导致砂浆粘结力不足，形成“松散状”基层；二是养护不到位，砂浆抹覆后未在规定时间内保湿养护，尤其是济南夏季高温干燥、冬季低温寒冷的气候，极易导致水泥水化不充分，砂浆强度无法达标，出现无附着力、一刮就掉的现象。

　　Many homeowners in Jinan, when faced with sanding on their walls, their first reaction is to purchase sand fixing agents and spray them online, trying to solve the problem through simple operations. However, many people overlook the core pain point: the root cause of sanding on the plastering mortar is the defects in the base layer itself, rather than the surface floating sand problem. Based on on-site construction experience and the requirements of the "Technical Regulations for Building Plastering and Mortar", the sanding and sanding of household walls in Jinan are mainly caused by two core reasons: firstly, the imbalance of mortar mix proportion, insufficient cement dosage during construction, excessive mud content in sand particles (exceeding 3%), or uncontrolled water cement ratio, resulting in insufficient bonding strength of mortar and the formation of a "loose" base layer; The second issue is inadequate maintenance, where the mortar is not moisturized and cured within the specified time after application, especially in Jinan's hot and dry summer climate and cold and cold winter climate. This can easily lead to insufficient hydration of cement, failure to meet mortar strength standards, and the occurrence of lack of adhesion and easy scraping off.

　　针对不同区域的墙面起砂问题，处理方式需区别对待，盲目使用固沙剂可能埋下更大隐患。对于济南家庭客厅、餐厅、卧室等干燥区域的墙面，若起砂程度较轻，可采用优质固沙剂喷涂处理，施工后需进行强度检测，用钉子划擦无脱落、无浮砂，证明基层强度达标后，再进行批腻子、刷涂料工序，基本可满足日常使用需求，无需大面积返工。但需注意，固沙剂仅能解决表面松散问题，无法从根本上弥补砂浆配合比和养护不足的缺陷，仅适用于干燥、非承重的墙面区域。

　　The problem of sanding on walls in different areas needs to be treated differently, and blindly using sand fixing agents may pose greater hidden dangers. For the walls of dry areas such as living rooms, dining rooms, bedrooms, etc. in Jinan, if the sanding degree is light, high-quality sand fixing agents can be sprayed for treatment. After construction, strength testing should be carried out, and nails should be used to scratch without falling off or floating sand. After proving that the base strength meets the standard, putty and coating processes can be carried out, which can basically meet daily use needs and do not require large-scale rework. However, it should be noted that sand fixing agents can only solve the problem of surface looseness and cannot fundamentally compensate for the shortcomings of insufficient mortar mix ratio and curing. They are only suitable for dry, non load bearing wall areas.

　　而厨房、卫生间等需要贴瓷砖的潮湿区域，一旦出现起砂掉沙，严禁仅用固沙剂处理后直接贴砖。据济南装修行业返工案例统计，此类区域若基层强度不足，即便使用高强度粘接砂浆或瓷砖胶，后期仍有60%以上的概率出现瓷砖空鼓、脱落，严重时粘接砂浆层会直接将基层松散砂浆一并带落，不仅影响美观，更可能砸伤人员。按照规范要求，此类区域需彻底铲除起砂基层，重新按标准配比调制抹面砂浆，分层施工并做好保湿养护，确保基层抗压强度达标后，再进行贴砖作业，从根源上杜绝脱落风险。

　　In damp areas such as kitchens and bathrooms that require tiling, once sanding occurs, it is strictly prohibited to use only sand fixing agents for direct tiling. According to the statistics of rework cases in the decoration industry in Jinan, if the base strength of such areas is insufficient, even if high-strength bonding mortar or tile adhesive is used, there is still a probability of over 60% of tile hollowing and falling off in the later stage. In severe cases, the bonding mortar layer will directly bring down the loose mortar of the base, which not only affects the appearance, but also may injure personnel. According to the regulatory requirements, such areas need to completely remove the sandy base layer, re mix the plastering mortar according to the standard ratio, carry out layered construction and do a good job of moisturizing and curing, ensure that the compressive strength of the base layer meets the standard, and then carry out tiling operations to eliminate the risk of detachment from the root.

　　在此提醒济南广大业主，抹面砂浆的施工质量直接决定墙面使用寿命和居住安全，切勿为了节省成本、缩短工期，忽视砂浆配合比和养护环节。选择专业的施工团队，严格遵循《建筑装饰装修工程质量验收标准》，做好基层处理和后期养护，才能避免起砂掉沙、瓷砖脱落等问题。若已出现墙面起砂困扰，建议及时联系专业人员检测基层强度，针对性采取处理措施，避免小问题拖成大隐患，既浪费时间成本，又影响居住体验。

　　We would like to remind all homeowners in Jinan that the construction quality of plastering mortar directly determines the service life and living safety of the wall. Do not neglect the mortar mix ratio and maintenance process in order to save costs and shorten the construction period. Choose a professional construction team, strictly follow the "Quality Acceptance Standards for Building Decoration and Renovation Projects", do a good job in grassroots treatment and post maintenance, in order to avoid problems such as sanding and tile detachment. If there is a problem of sanding on the wall, it is recommended to contact professional personnel in a timely manner to test the strength of the base layer and take targeted measures to avoid small problems from becoming major hidden dangers, which not only wastes time and cost but also affects the living experience.

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