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The alkali–silica reaction (ASR), also commonly known as concrete cancer, [3] is a deleterious internal swelling reaction that occurs over time in concrete between the highly alkaline cement paste and the reactive amorphous (i.e., non-crystalline) silica found in many common aggregates, given sufficient moisture.
Aquifer storage and recovery (ASR) is the direct injection of surface water supplies such as potable water, reclaimed water (i.e. rainwater), or river water into an aquifer for later recovery and use. The injection and extraction is often done by means of a well.
Surface of a concrete pillar with crack pattern of alkali–silica reaction. Alkali–aggregate reaction is a term mainly referring to a reaction which occurs over time in concrete between the highly alkaline cement paste and non-crystalline silicon dioxide, which is found in many common aggregates.
ASR waste contains 30% organic matter and inorganic compounds such as lead, zinc, quartz, [citation needed] calcite, [citation needed] magnetite, anhydrite and hematite. Some of the methods to recycle ASR are: [1] [4] Using as a retarder for ordinary Portland cement by transformation into aggregates after thermal treatment followed by chemical ...
The U.S. Food and Drug Administration (FDA) defines analyte specific reagents (ASRs) in 21 CFR 864.4020 as “antibodies, both polyclonal and monoclonal, specific receptor proteins, ligands, nucleic acid sequences, and similar reagents which, through specific binding or chemical reaction with substances in a specimen, are intended to be used in a diagnostic application for identification and ...
In the fourth quarter, we completed the ASR, retiring an additional 25 million shares. We also repurchased 87 million shares in the open market during the quarter at an average price of $53.84 a ...
This choice can be based on personnel availability, input resources availability, risk mitigation, etc. In case you do not have any of these limitations, it is suggested to go for a breadth-first strategy. Identify the Architecturally Significant Requirements (ASR) for the chosen element
The nation’s growing home insurance crisis is in the spotlight as Californians begin the long road to rebuilding after the deadly Eaton and Palisades wildfires. For neighbors Louise Hamlin and ...