砌体工程冬季施工基本要求.doc

砌体工程冬季施工基本要求 砌体工程冬季施工基本要求提要：当室外温度低于+5℃，砖，砌块等材料不得浇水，砂浆的搅拌时间也应有所增长，一般为常温搅拌时间的倍，约为~3分钟 源自物业管理资料 砌体工程冬季施工基本要求 1、材料要求 水泥宜采用普通硅酸盐水泥，标号为，水泥不得受潮结块. 普通砖，空心砖，混凝土小型空心砌块，加气混凝土砌块在砌筑前，应清除表面污物，冰雪等.遭水浸后冻结的砖和砌块不得使用. 石灰膏等宜采取保温防冻措施，如遭冻结，应经融化后方可使用. 砂宜采用中砂，含泥量应满足规范要求，砂中不得含有冰块及直径大于1cm的冻结块. 砌筑砂浆的稠度，宜比常温施工时适当调整，并宜通过优先选用外加剂方法来提高砂浆的稠度.在负温条件下，砂浆的稠度可比常温时大1~3厘米，但不得大于12厘米，以确保砂浆与砖的粘结力. 　　2、施工方法 砌筑应采用”三一砌筑法”，若采用平铺砂浆时，应使铺灰长度满足砂浆砌筑时的温度不致过低. 严禁使用遭冻结的砂浆进行砌筑. 当室外温度低于+5℃，砖，砌块等材料不得浇水，砂浆的搅拌时间也应有所增长，一般为常温搅拌时间的倍，约为~3分钟. 防止砂浆在搅拌，运输，存放过程中的热量损失可采用下列方法: 1)砂浆的搅拌可在保温棚内进行，砂浆要随拌随用，存储时间不超过60分钟，不可积存和两次倒运. 2)搅拌地点应尽量靠近施工现场，以缩短运距. 砌体的水平及垂直灰缝的厚度应保证在8~12mm，一般宜控制在10mm左右. 控制砌体砌筑高度，每日砌筑一般高度不超过 每天收工前，应将顶面的垂直灰缝填满，同时在砌体表面覆盖保温材料. 现场的试块的留设应有所增加，且在现场同条件下进行养护，用于检验现场砌筑砂浆的实际强度. 源自物业管理资料 Measures for the routine management of moral education in Middle SchoolsMethod of conventional management of moral education in middle schoolFirst, the guiding ideology:School moral education is an organic whole of the whole education work, always adhere to the school adhere to the moral education, education for this product, and actively promote the quality education, the school building efficient curriculum system of moral education, moral education, improve the sense of attraction and appeal, enhance the moral education work for through and timeliness. Teach everyone, service education and management education, and school moral education work must be with family education and community education closely together, to form a concerted pattern, and strive to create a good atmosphere for education, and to promote the all-round development of students, to establish a scientific moral education full of vigor the For long-term mechanism.Two, the goal of moral education:To guide the students to form the correct world outlook, outlook on life, values, to cultivate students unity and mutual assistance, honest and trustworthy, law-abiding, good quality, hard work, set a good XX stud