模板要求– QUALITY, SAFETY & ECONOMY

在选择材料的模板中，三个一般原则新利客户的quality,safety和economymust be paramount. Material quality can ensure safety, and significantly contributes to the achievement of economy. Formwork failure can result in loss of life and always causes catastrophic financial loss.

可以给出一些普遍的准则，用于表格面和框架材料，以及相关组件。18新利官网登录在线新利客户这些可以覆盖在标题下

1. 力量
2. 刚性
3. Impact Resistance
4. 耐久性
5. 重量
6. 准确性
7. Compatibility
8. 绝缘

1.力量

The material strength must be adequate to resist the forces anticipated. This is not only a structural design requirement, but also an essential safety aspect.

2.刚性

The structural movement under load must be small and predictable. These deformations and deflections can be a significant part of the total deviations in the formed concrete surface. When the formwork designer is planning the formwork system, decisions must be made on the total deviation that will be acceptable, and to what extent workmanship errors and structural deformation will each contribute to this. To ensure that the total deviations do not exceed the tolerances, the material stiffness and the workmanship accuracy must be consistent.

3.Impact Resistance

The forms must be built to ensure that the damaged form, although unserviceable, does not generate falling debris. It follows, that the way in which the formwork materials fails, will determine this. To comply with this important safety aspect, materials exhibiting ductile failure are far superior to those that fail in a precipitate and brittle manner.

4.耐久性

在经济的利益，以及在每次重用模板中的质量混凝土产品的成就，其材料必须耐用。新利客户Formworm几乎始终在开放中构建和超出。在重新使用之间，其材料和组件通常在天气中储新利客户存。18新利官网登录在线理想情况下，框架，部件和Formfa18新利官网登录在线ce材料应抵抗环境的蹂躏。新利客户他们应该在太阳，风雨的影响下进行缓慢的恶化。通过适当的护理和维护，可以提高它们对劣化的抵抗力。材料耐用性不仅重要的是实现优质混凝土表面饰面，还可以确保模板结构总是安全的。

5。重量

In the assembly of formwork, most individual members and components are moved into position by hand. This occurs even when the completed formwork assembly is so heavy that it can only be moved and positioned by crane. Ideally, for efficiency and economy, framing members, formwork components and formface materials, should be sized such that their weight is within the lifting ability of one form worker. If the weight exceeds that which can be carried by two personnel, crane handling is called for. The next level of formwork weight restrictions is set by the lifting limitations of the on-site crane.

6。准确性

对于经济性，应该可以组装成型和切割材料的模板。新利客户材料，胶合板床单和框架构件的大小一致，对此目的新利客户很重要。本章后面讨论了胶合板床单和木材尺寸的准确性。

7。Compatibility

The materials of the formwork must not be incompatible with either the fluid concrete or the hardened concrete. At the formface the constituents of the form materials must not react with the hydrating cement of the concrete. For example, some timbers contain wood sugars that break down the cement. After the concrete hardens some timbers, such as eucalypts, can severely stain the concrete. When water runs over this timber and onto the concrete, dark brown stains usually results.

8。绝缘

形式材料选择及其保护中的极端热量和寒冷存在问题。新利客户通过低温速度和随后的强度增益的设定速率降低，如果混合物中的水变得冷冻，则冰的形成将破坏混凝土基质内的化学键合。在混凝土在低温下的情况下，可以加热骨料储存箱和混合水，以产生在初始设定期间不会冷却的温热的混凝土，而其自身的内部热量会产生。

For all forms, the placing of the fluid concrete, particularly with crushed rock aggregate, can cause some abrasive damage to the formface at first use and each reuse. When the concrete has hardened, the forms are stripped, and this can contribute to surface damage. Abrasion will occur if the forms are permitted to slide on the concrete face.

其次必须最小化Formface处的吸湿吸收。从混凝土进入地面的水分损失导致混凝土的水合染色，具有严重变暗的表面贴片。对于优质混凝土表面，指定了颜色控制，这是完全不可接受的。对于任何混凝土表面，水合染色是手段差的水泥水合，混凝土弱和低表面耐久性。

Also Read:When to Remove formwork

Also Read:如何在模板中实现经济

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