HOW TO INCREASE DURABILITY OF CONCRETE PILES?

混凝土桩的耐久性

将混合混凝土压实到密集的不透水质量是所有结构材料中最永久的一种,并且对其在非侵略性环境中的长期耐久性令人担忧的影响。新利18体育官网登录但是,具体可以被硫酸盐和硫酸袭击occurring naturally in soils, by corrosive chemicals which may be present in industrial waste in fill materials and by organic acids and carbon dioxide present in ground water as a result of decaying vegetable matters. Attack by sulphates is a disruptive process whereas the action of organic acids or dissolved carbon dioxide is one of leaching. Attack by sulphuric acid combines features of both processes. The severity of attack by soluble sulphates must be assessed by determining the soluble sulphate content and the proportions of the various cat ions present in an aqueous extract of the soil. These determinations must be made in all cases where the concentration of sulphate in a soil sample exceeds0.5%

密集,良好的压实混凝土为混凝土桩,桩帽和地面梁的硫酸盐进行了最佳保护。致密混凝土的低渗透性可防止或大大限制硫酸盐进入混凝土的孔隙空间。因此,高强度预制混凝土桩是最有利的类型。然而,如果必须旨在旨在旨在旨在旨在旨在旨在旨在旨在旨在实现所需的不透明度和抗侵略性行动的所需不透明度和抵抗力,因此它们不适合所有现场条件和钻孔铸造铸造铸造铸造。既不是高氧化铝水泥也不是超级硫酸化水泥,用于打桩工作。相反,依赖于用a制成的密集不透水混凝土的电阻low water cement ratio。Coating of tar or bitumen on the surface, metal sheeting or glass fibre wrapping impregnated with bitumen may be adopted.

通过铺设在砂地毯或致盲的混凝土上,可以通过一层重尺寸的聚乙烯片保护在底侧上保护桩帽和地梁。垂直侧面可以在移除表格工作后保护应用热沥青喷涂涂层,沥青涂料,划向咀嚼沥青或粘合剂塑料片。

在预制混凝土桩中只考虑了对混凝土的侵略性行动的预防措施。原位混凝土的铸造仅用于钢管或圆柱预制混凝土壳丸的听力。对于海洋状况的预制混凝土桩,最低普通普通波特兰水泥含量360.kg / m.3.and a maximum水水泥比为0.45重量应该采用。

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