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A bughole (or pinhole) is a small hole in the surface of a concrete structure caused by the expansion and eventual outgassing of trapped pockets of air in setting concrete. [1] [2] [3] Bugholes are undesirable, as they may compromise the structural integrity of concrete emplacements.
Concrete carbonation can be visually revealed by applying a phenolphthalein solution over the fresh surface of a concrete samples (concrete core, prism, freshly fractured bar). Phenolphthalein is a pH indicator , whose color turns from colorless at pH < 8.5 to pink-fuchsia at pH > 9.5.
Improper consolidation of concrete can cause product defects, compromise the concrete strength, and produce surface blemishes such as bug holes and honeycombing. An internal concrete vibrator is a steel cylinder about the size of the handle of a baseball bat, with a hose or electrical cord attached to one end. The vibrator head is immersed in ...
A common sign of skunks is the presence of 1 to 3-inch cone-shaped holes all over your lawn where skunks have foraged for grubs and worms. They are nocturnal but will occasionally forage in ...
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Here are some of the mot common bug, insect and spider bites you might be dealing with — and insect bite pictures to help you figure out what type of creature is responsible. Tick bites
The concrete is poured in to form the base with slopes from the precast concrete wall down to the half point of the existing pipe. This forms a half bench for the manhole base. The top half of that existing pipe is cut open to form a channel. A new pipe is inserted through the wall hole.
A concrete surface is alkaline, making it difficult for microbes to germinate. However, chemical processes by the environment and microorganisms themselves cause changes in the concrete. Environmental conditions combined with carbonization caused by select microbes fabricate negative changes in the pH of the concrete.