Aggressive agents present in the environment that penetrate concrete through its pore structure induce deterioration, compromising the service life of concrete members. Determining the viability of using recycled materials in structural concrete calls for a prior understanding of their effect on water transport, the primary vehicle for external agent ingress. This article describes durability indicators such as electrical resistivity, water permeability (pressure testing), total water absorption, effective porosity and sorptivity that directly or indirectly measure water penetration and consequently performance across the service life of concrete bearing 20 % to 100 % mixed recycled aggregate (MRA). The 28 d concretes studied here with up to 75 % MRA exhibited <7 % weight gain due to water absorption, <15 vol.% porosity and <30 mm maximum depth of water penetration under pressure, all indicative of high quality concrete. In 90 d materials, the values of the aforementioned parameters were 40 % lower. Even in concrete with up to 100 % MRA (with 28 d readings of 50 Ω·m to 100 Ω·m), electrical resistivity remained unaffected, The present findings reveal that high quality high durability structural concrete can be viably manufactured with up to 75 % MRA.

存在于环境中的侵蚀剂会通过其孔隙结构渗透混凝土，从而导致劣化，从而损害混凝土构件的使用寿命。要确定在结构混凝土中使用再生材料的可行性，需要事先了解其对水运输的影响，水运输是导致外部介质进入的主要工具。本文介绍了耐久性指标，例如电阻率，水渗透性（压力测试），总吸水率，有效孔隙率和吸水性，这些指标直接或间接地测量了水的渗透率，从而测量了20％至100％的混合再生骨料在整个混凝土使用寿命中的性能（MRA）。此处研究的具有MRA最高为75％的28天混凝土由于吸水，<15体积％孔隙率和< 在压力下最大水渗透深度为30毫米，均表明混凝土质量高。在90 d材料中，上述参数的值降低了40％。即使在MRA高达100％的混凝土中（从50Ω·m到100Ω·m的28 d读数），电阻率也不会受到影响。目前的发现表明，高质量，高耐久性的结构混凝土可以用75到75来制造。 ％MRA。