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In masonry, sulfates produced by the oxidation of pyrite in clay materials can be present in bricks. They are gradually released over a long period of time, causing sulfate attack of mortar, especially where moisture movement concentrates the sulfates. [4]
Repair principles which do not improve the strength or performance of concrete beyond its original (undamaged) condition include replacement and restoration of concrete after spalling and delamination; strengthening to restore structural load-bearing capacity; and increasing resistance to physical or mechanical attack.
Repair in damaged sections is possible, but the reaction will continue. In some cases, when a sufficient drying of thin components (walls, slabs) of a structure is possible, and is followed by the installation of a watertight membrane , the evolution of the reaction can be slowed down, and sometimes stopped, due to the lack of water needed to ...
In a report dated Feb. 8, Engineer David Valliere noted an area of brick “cracked and crumbling” that needed repairs but determined it was not an “imminent threat to the building or its ...
More: Oklahoma needs $25 billion to fix crumbling infrastructure. But the focus is on tax cuts But the focus is on tax cuts We know that this work is more than just facts and figures.
And beyond that, AI can help human designers express their ingenuity and create a better future—and perhaps help the U.S. fix its infrastructure crisis before it’s too late.
Mortar holding weathered bricks. Mortar is a workable paste which hardens to bind building blocks such as stones, bricks, and concrete masonry units, to fill and seal the irregular gaps between them, spread the weight of them evenly, and sometimes to add decorative colours or patterns to masonry walls.
Unfixed cave-ins. A crumbling water treatment plant. Oklahoma's state parks are struggling to keep up with crises related to crumbling infrastructure.