弃用:与他们的班级相同的方法将在未来的PHP版本中是构造函数;qa_layer_9_from_layer_php有一个已弃用的构造函数/home/abouaayt/public_html/aboutcivil/answers/qa-include/qa-base.php (720):eval()'d代码在线的3.
/home/abouaayt/public_html/aboutcivil/answers/qa-plugin/user-management/layer.php. 不同类型的混凝土混合物及其用途 - 土木工程技术问题答案 - 提出土木工程师
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不同类型的混凝土混合物及其用途
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干式准备混合
这是通常在许多家庭改进商店中发现的混合类型。它进入袋子,并包含除水外的混凝土的所有必要组件。它清楚地说出了家庭许多混凝土干燥就绪混合将在添加水时产生,使得易于计算项目需要多少。一些制造商为不同类型的项目提供了多种类型。要使用所有所需的是,适量的水和一个混凝土的地方和工具。如果您遵循制造商的说明,这种混凝土几乎是万无一失的。但是,您将比其他类型的混合支付干燥就绪混合的费用。对于小型职位,干燥就绪混合可以更具成本效益比其他选择更具成本效益,因此如果经济是优先级,则不会自动统治这种选择。但是,对于大型项目,另一种选择几乎总是更便宜。准备好准备混合是另一种装备到休闲做的产品,尽管比干就绪混合更难以找到。 This option comes with water added, ready to be immediately used. It comes in a small trailer that can be brought to your home, and the concrete should immediately be used. Sometimes that trailer contains a rotating drum that mixes the concrete as you go, other times the trailer contains just a large box with it in it. There are several drawbacks to ready mix concrete. First, it can be both difficult to find as well as expensive. Second, you must have a car that can successfully haul the concrete, which can be very heavy. Third, you must schedule buying ready mix so it does not sit too long before use and you must limit travel time. All of these drawbacks can become significant problems, so be sure to carefully consider your project's needs before buying ready mix. Bulk dry materials If you have a large project, buying your own bulk dry materials and mixing them yourself is often the most cost effective option. In addition to the economy bulk dry materials offer, you can also customize the mix to your specific strength and aesthetic needs.
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