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.
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Either medicine (bupropion or pristiq) works for me for my anxiety, its just the side effects are the issue here. My doctor told me with pristiq, most people don't have issues with side effects. Read More. i used to sell Effexor XR and my girlfriend sells Pristiq and said it is the same.ead More. So I was started taking the 150mg Wellbutrin along with 50mg of Zoloft for about a month and then the next month 150mg Wellbutrin along with 25mg of Zoloft. Now that I am only taking Wellbutrin-it's been about 2 weeks-I feel that the panics attacks are back and I'm a bit lightheaded daily.