住宅楼、综合楼的木门窗框产生变形现象主要是由于塞缝不密实,塞缝砂浆品种、级配不当,砂浆硬化前受到碰撞及砂浆凝结收缩等因素引起的。我们针对上述质量通病,专门成立 QC 小组进行攻关。经过近两年的探索,很好地解决了这些问题。现把具体做法介绍如下。一、预制混凝土木砖预制240毫米×120毫米×120毫米的C20细石混凝土预制块,内埋180(120)毫米×80毫米×60毫米的 The deformation of wooden doors and windows frames of residential buildings and complex buildings is mainly due to the fact that the plug joints are not dense, the type and the gradation of the plug joint mortar are improper, and the mortar is affected by the collision and the mortar condensation shrinkage before hardening. For the above-mentioned quality problems, we set up a QC team to tackle the issue. After nearly two years of exploration, these problems have been well solved. The specific practices are described below. 1. Prefabricated concrete wooden bricks Prefabricated blocks of C20 fine stone concrete of 240 mm × 120 mm × 120 mm with 180 (120) mm × 80 mm × 60 mm built-in