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2. Self-healing concrete - Wikipedia

   en.wikipedia.org/wiki/Self-healing_concrete

   [1] [2] Therefore, it is essential to limit the crack's width and repair it as quickly as feasible. Self-healing concrete would not only make the material more sustainable, but it would also contribute to an increase in the service life of concrete structures and make the material more durable and environmentally friendly. [3] [4]

3. List of commercially available roofing materials - Wikipedia

   en.wikipedia.org/wiki/List_of_commercially...

   Tile roofing traditionally consists of locally available materials such as clay, granite, terracotta or slate, though many modern applications contain concrete. Imbrex and tegula, style dating back to ancient Greece and Rome. Monk and nun, a style similar to Imbrex and tegula, but basically using two Imbrex tiles. Dutch roof tiles, Netherlands

4. Roof tiles - Wikipedia

   en.wikipedia.org/wiki/Roof_tiles

   Clay and slate tiles are stable materials and naturally resistant to chemical decomposition, however plastic composite tiles and concrete tiles will experience inevitable decay over time. As a result of this, high-quality clay and slate tiles have a proven lifespan of over 100 years, whereas synthetic and concrete tiles usually have a practical ...

5. Crack spacing of reinforced concrete - Wikipedia

   en.wikipedia.org/wiki/Crack_spacing_of...

   When a reinforced concrete member is put in tension, after cracking, the member elongates by widening of cracks and by formation of new cracks. Figure 1 Formation of internal cracks. Ignoring the small elastic strain in the concrete between the cracks, we can relate the crack width to the strain of the member by:

6. Self-healing material - Wikipedia

   en.wikipedia.org/wiki/Self-healing_material

   Autogenous healing is the natural ability of cementitious materials to repair cracks. This ability is principally attributed to further hydration of unhydrated cement particles and carbonation of dissolved calcium hydroxide. [105] Cementitious materials in fresh-water systems can autogenously heal cracks up to 0.2 mm over a period of 7 weeks. [106]

7. Roman concrete - Wikipedia

   en.wikipedia.org/wiki/Roman_concrete

   As seawater percolated within the tiny cracks in the Roman concrete, it reacted with phillipsite naturally found in the volcanic rock and created aluminous tobermorite crystals. The result is a candidate for "the most durable building material in human history". In contrast, modern concrete exposed to saltwater deteriorates within decades. [17 ...

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9. Reinforced concrete - Wikipedia

   en.wikipedia.org/wiki/Reinforced_concrete

   Concrete wall cracking as steel reinforcing corrodes and swells. Rust has a lower density than metal, so it expands as it forms, cracking the decorative cladding off the wall as well as damaging the structural concrete. The breakage of material from a surface is called spalling.