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最近上海市建委发出了《关于确保钢丝网板条吊平顶质量,防止再次塌落事故的通知》,我想就其抹灰质量控制谈几点体会: 要达到钢丝网吊顶的理想质量,可从用料选择与操作两个方面下功夫。一、材料性能分析。 1.水泥:具有强度发展快,粘结力和易性好,便于操作等优点。但水泥是水硬性材料,在潮湿环境中硬化时其体积有增无减,而在空气干燥条件下则又会产生干缩裂缝。 2.石灰膏:具有增加和易性和一般胶结作用,是气硬性材料,在空气中逐渐硬化,当它与适量黄砂或纸筋纤维拌合后,在凝固
Recently, the Shanghai Municipal Construction Commission issued the “Notice on ensuring the quality of steel wire net battens hanging flat to prevent the accident of another slump,” and I would like to talk about a few experiences on the quality control of plastering: To achieve the ideal quality of wire mesh ceilings, From the use of materials selection and operation two efforts. First, material performance analysis. 1. Cement: It has the advantages of rapid strength development, good adhesion and easy handling, and so on. However, cement is a hydraulic material, which will increase in volume when it is hardened in a humid environment, and it will produce dry shrinkage cracks in air-drying conditions. 2. Lime ointment: It is an air-hardening material with increasing workability and general cementation. It gradually hardens in the air, and when it is mixed with the appropriate amount of yellow sand or paper fiber, it is solidified.