Fine grained of alkali igneous rocks cannot be used in cement because of the volume expansion caused by the Alkali-silica reaction, fine-grained igneous rocks cannot be used as aggregates in cement.
<h3>What does fine grained mean in an igneous rock?</h3>
Extrusive igneous rocks have a fine-grained or aphanitic texture, with grains that are too small to see without a magnifying glass. The fine-grained texture suggests that the rapidly cooling lava did not have enough time to form large crystals. A petrographic microscope can be used to examine these tiny crystals.
The texture of an igneous rock (fine-grained vs coarse-grained) is determined by the rate at which the melt cools: slow cooling produces large crystals, while fast cooling produces small crystals.
The chemical reaction that occurs in both alkali cations and hydroxyl ions in the pore solution of hydrated cement paste and certain reactive silica phases present in concrete aggregates is known as the alkali-silica reaction (ASR).
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Answer:
Visual analysis
Explanation:
Reverse engineering is the reproduction of another manufacture's product after proper examining the way it was constructed or designed and its composition.
The stages of reverse engineering are;
- Implementation recovery that involves quick learning about application and preparation of an initial model
- Design recovery where you undo the previous database mechanics structures and change to recovery foreign main references.
- Analysis recovery that removes design artifacts and eliminate any errors in the model.
The step of visual analysis involves taking something apart and analyzing its working in details. Here the items observed are;
- Aesthetics that are concerned with the physical appearance of the product
- Elements which are the individual building blocks of the design.
