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Making bioreceptive concrete: Formulation and testing of bioreceptive concrete mixtures
Journal of Building Engineering ( IF 6.7 ) Pub Date : 2021-05-02 , DOI: 10.1016/j.jobe.2021.102545
M. Veeger , M. Ottelé , A. Prieto

Increased urbanisation will put an increasing strain on our green spaces, which is expected to have a significant effect on our physical and mental health, as well as the health of our ecosystems. As such it is important to integrate more green spaces in our urban fabric. One way of doing this is by making use of so-called bioreceptive concrete on our façades and other structures, which allows for biological growth to take place on the concrete substrate itself, without requiring any additional systems or maintenance. However, the challenge is to create an affordable concrete mixture that is sufficiently bioreceptive for biological growth to take place. As such, in our research we test four possible measures to make concrete more bioreceptive: changing the aggregate to CEC (crushed expanded clay), adding bone ash to the mixture, increasing the wcf (water cement factor) and using a surface retarder on the concrete. Of these measures, changing the aggregate to CEC (p = 0.024), the addition of bone ash (p = 0.022) and the use of a surface retarder (p < 0.001) were found to significantly increase bioreceptivity. Increasing the wcf factor, however, was not found to significantly increase bioreceptivity (p = 0.429). It was also found that whereas it was previously though a pH below 10 is necessary for biological growth to take place, this does not appear to be the case. Although further research under natural conditions is necessary, the creation of an inexpensive bioreceptive concrete looks to be feasible.



中文翻译:

制备生物相容性混凝土:生物相容性混凝土混合物的配制和测试

城市化程度的提高将给我们的绿色空间带来越来越大的压力,预计这将对我们的身心健康以及生态系统的健康产生重大影响。因此,重要的是在我们的城市结构中整合更多的绿色空间。一种做到这一点的方法是在我们的外墙和其他结构上使用所谓的生物可接受混凝土,这使得生物生长可以在混凝土基材本身上进行,而无需任何额外的系统或维护。然而,挑战是要创造一种价格合理的混凝土混合物,该混合物具有足够的生物吸收能力,可以进行生物生长。因此,在我们的研究中,我们测试了四种可能的方法来使混凝土更具生物吸收性:将骨料更改为CEC(压碎的膨胀粘土),向混合物中添加骨灰,增加wcf(水凝结系数)并在混凝土上使用表面缓凝剂。在这些措施中,发现将骨料改为CEC(p = 0.024),添加骨灰(p = 0.022)和使用表面阻滞剂(p <0.001)可以显着提高生物接受度。但是,发现增加wcf因子不会显着提高生物接受度(p = 0.429)。还发现尽管以前虽然必须发生低于10的pH才能进行生物生长,但事实并非如此。尽管有必要在自然条件下进行进一步的研究,但制造廉价的生物受体混凝土似乎是可行的。022)和使用表面阻滞剂(p <0.001)可以显着提高生物接受度。但是,发现增加wcf因子不会显着提高生物接受度(p = 0.429)。还发现尽管以前虽然必须发生低于10的pH才能进行生物生长,但事实并非如此。尽管有必要在自然条件下进行进一步的研究,但制造廉价的生物受体混凝土似乎是可行的。022)和使用表面阻滞剂(p <0.001)可以显着提高生物接受度。但是,发现增加wcf因子不会显着提高生物接受度(p = 0.429)。还发现尽管以前虽然必须发生低于10的pH才能进行生物生长,但事实并非如此。尽管有必要在自然条件下进行进一步的研究,但制造廉价的生物受体混凝土似乎是可行的。事实并非如此。尽管有必要在自然条件下进行进一步的研究,但制造廉价的生物受体混凝土似乎是可行的。事实并非如此。尽管有必要在自然条件下进行进一步的研究,但制造廉价的生物受体混凝土似乎是可行的。

更新日期:2021-05-11
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