Concrete Matter

What do water striders and concrete cracking have in common?

What do water striders and concrete cracking have in common?

Why does the surface of the water in a glass curl up at the edges and form a meniscus? The truth is, the water wants to escape but is held back by gravity. In a small diameter glass tube, the water will rise much higher because there is less water and gravity does not exert such an influence. The water has little attraction to the air above it and the effect is known as capillary attraction. [rml_... »

Why do we drill concrete cores?

Why do we drill concrete cores?

Assessment of concrete strength has traditionally been done by making and crushing of concrete cubes. This test gives little information regarding the strength of the concrete in the structure never specified. The strength specified on a drawing or a [rml_read_more] project specification is a cube strength which cannot consider any poor workmanship by the contractor, e.g. poor compaction, loss of ... »

Is concrete cracking the result of shrinkage only?

Is concrete cracking the result of shrinkage only?

Take a hypothetical example of a rugby pitch (or soccer if you prefer). Bring in a sheet of glass the same size as the pitch by using at least four powerful helicopters and place it on the grass. Raid the kitchen cupboard for the “Spray and Cook” and spray the surface of the glass. »