Because cracks are the main problem of mass concrete, this paper investigates an experimental study on effect polypropylene microfiber (PPMFs) self -repair behavior through microstructure, workability, physical, and mechanical properties concrete. PPMFs with a diameter 18 µm add in different percentages (0, 0.5, 1 1.5) % cement weight. Where prepared mixture ratio was (1:2:4.8) water-cement (W/...

Additive manufacturing (AM) with concrete, also known as concrete 3D printing, is one of the most interesting approaches for disrupting construction industry and currently subject to numerous research activities worldwide. AM has great potential decrease labour costs increase material efficiency geometric complexity non-standardised building components. Although prior investigations have shown ...

Self-healing concrete has shown excellent potential in improving the durability of (reinforced) structures and reducing need for their repair maintenance. This been further substantiated by several successful full-scale demonstrator projects. Nevertheless, industrial uptake technology is lagging behind, mainly due to higher initial cost compared traditional concrete. In addition, it well known ...

Full scale tests with crushed concrete used in sub-bases in roads show that the material has capacity to reharden, very slowly but also after prolonged periods of time. The rehardening process in crushed concrete aggregate has been analysed with a thermogravimetric method, comparing the change in chemical composition in the aggregate when set with water, compacted and hardened. It has been show...