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Mixture proportion design of pervious concrete based on the relationships between fundamental properties and skeleton structures
Cement and Concrete Composites ( IF 10.5 ) Pub Date : 2020-06-18 , DOI: 10.1016/j.cemconcomp.2020.103693
Xiaogeng Xie , Tongsheng Zhang , Chao Wang , Yongmin Yang , Anna Bogush , Elena Khayrulina , Zhaoming Huang , Jiangxiong Wei , Qijun Yu

Both the porosity-based method and the paste coating thickness-based method are aimed to design pervious concrete with target porosity. However, the properties of pervious concrete are partially related to its porosity, leading to their poor precision and repeatability. Actually, the skeleton structures of pervious concrete, which govern the permeability of pervious concrete, can be characterized by the number of contact zones, the width of contact zones, and the paste thickness between neighboring aggregates, and the mechanical properties are also influenced by the strengths of cement paste and aggregate. Therefore, the relationships between fundamental properties and the skeleton structures of pervious concrete must be clarified prior to the mixture proportion design. In the present study, structurally-designed pervious concretes were prepared by rationally changing their skeleton structures. Then the compressive strength and permeability of pervious concretes were measured and corelated to their skeleton structures and the strength of cement paste. Based on the empirical equations established, a new mixture proportion design method for pervious concrete was proposed to achieve the target compressive strength and permeability. Experimental validation presented that the design method has higher reliability, precision, and adaptability.



中文翻译:

基于基础性能与骨架结构关系的透水混凝土配合比设计

基于孔隙率的方法和基于糊剂涂层厚度的方法均旨在设计具有目标孔隙率的透水混凝土。但是,透水混凝土的性能与其孔隙率部分相关,导致其精度和重复性差。实际上,控制渗透性混凝土渗透性的渗透性混凝土骨架结构可以通过接触区域的数量,接触区域的宽度以及相邻集料之间的浆糊厚度来表征,并且力学性能也受其影响。水泥浆和骨料的强度。因此,在混合比设计之前,必须弄清透水性混凝土的基本性能与骨架结构之间的关系。在目前的研究中,通过合理地改变其骨架结构来制备结构设计透水混凝土。然后测量透水混凝土的抗压强度和渗透率,并将其与骨架结构和水泥浆强度相关联。基于建立的经验方程,提出了一种新的透水混凝土配合比设计方法,以达到目标抗压强度和渗透率。实验验证表明,该设计方法具有较高的可靠性,精度和适应性。为了达到目标抗压强度和渗透率,提出了一种新的透水混凝土配合比设计方法。实验验证表明,该设计方法具有较高的可靠性,精度和适应性。为了达到目标抗压强度和渗透率,提出了一种新的透水混凝土配合比设计方法。实验验证表明,该设计方法具有较高的可靠性,精度和适应性。

更新日期:2020-06-24
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