The alkaliâsilica reaction (ASR) is a reaction which occurs over time in concrete between the highly alkaline cement paste and reactive non-crystalline (amorphous) silica, which is found in many common aggregates and sufficient moisture.his reaction causes the expansion of the altered aggregate by the formation of a swelling gel of calcium silicate hydrate (C-S-H). This gel increases in volume with water, and exerts an expansive pressure inside the material, causing spalling and loss of strength of the concrete, finally leading to its failure.
How does Predoxen Work? Predoxen has got unique properties that makes it work to help men who have taken it realize improved testosterone levels in their bodies. Taking it also enhances production of more testosterone something which improves a manâs overall libido and sex drive.
Prilosec Prevacid, Aciphex are proton pump inhibitors (PPI), drugs that are very effective in shutting down acid production by the stomach. Prilosec and other PPI drugs are most effective during the day, especially after meals.That is why they are taken just prior to meals. However, PPIs don't work as well at night. Ranitidine (Zantac) is a H2-receptor-blocker.Generally H2-receptor-blockers are not as effective as the PPI drugs in suppressing stomach acid production. However, Zantac and other H2-receptor blockers work particularly well at night.owever, PPIs don't work as well at night. Ranitidine (Zantac) is a H2-receptor-blocker. Generally H2-receptor-blockers are not as effective as the PPI drugs in suppressing stomach acid production.