Research on structural compatibility of eco‐porous concrete and vegetation

Abstract

To investigate the structural compatibility of eco‐porous concrete (EPC) and vegetation, a simulation method (sand penetration coefficient) of structure compatibility between the eco‐porous concrete (EPC) and vegetation was put forward. Furthermore, the relation between sand penetration coefficient and pore characteristics were analyzed, and the technology of acquiring equivalent pore size was optimized. The results present that the new simulation method, characterized by sand penetration coefficient, can effectively assess the ability of eco‐porous concrete (EPC) to allow the root system to pass through. In addition, the real pore structure shape by “rubbing technology” can be easily and quickly obtained.

A Study on the Influencing Factors of the Compressive Strength of Planting Concrete

“…Because porous concrete has certain pores and a smaller cement paste volume than ordinary concrete, the traditional method of mixing with one-time material filling easily leads to pore blockage [8] , which is unfavorable both to the connectivity of the pores and the improvement of strength. Therefore, this experiment has adopted the paste-coating [9] method for concrete mixing. First, we add all the aggregate and 70% mixing water, mix for 60 seconds, then add half the cement and waterreducing agent, and mix again for 60 seconds; finally, we add the remaining cement and mixing water, and mix for 60 seconds; upon completion of mixing, we load it into the test mold in three layers; after filling each layer, immersion stick is used to operate 25 times evenly, and then we conduct surface leveling so that the bulging part is rough of the same volume with the depressed part; finally, we conduct curing 24-hour demoulding in Standard Curing Room; after demolding, curing is maintained to the specified age for performance test.…”

Sozialkreditdossiers in der Tradition staatlicher Personenakten in China: zunehmende Transparenz durch rechtliche Einbettung?

“…119 Die Beweislast bezüglich der Richtigkeit der Daten liegt laut DSG beim Verarbeiter. 120 Als nationales Gesetz müsste diese Regelung der BVR 121 und der Shanghaier Bestimmung 122 vorgehen, die die Beweislast anders verteilten.…”