Talk:Coal combustion products

Question
Which type of combustion product was released in the Tennessee coal sludge spill? Badagnani (talk) 20:20, 24 December 2008 (UTC)

Got it--fly ash. Badagnani (talk) 03:40, 25 December 2008 (UTC)

Promotional / biased article
I've flagged this article with the bias and advertisement tags, since it reads like a promotional brochure for the use of coal byproducts. A neutral article under this title should deal with the chemical products of coal combustion and their environmental effects, rather than just the ways that a few of them can be industrially recycled. --FOo (talk) 17:47, 16 March 2011 (UTC)

Oh, I see what happened. In August 2010, in a series of edits, a single-purpose account replaced neutral content with the promotional current content. I'll revert that now. :) --FOo (talk) 17:49, 16 March 2011 (UTC)

Proposed merge of Fly ash into Coal combustion products
Article is laser-focused on coal at present. A merge without redirect should be done to clear out the "fly ash" heading for general flue gas ash purposes. Artoria2e5 🌉 09:04, 12 April 2023 (UTC)
 * I've added a redirect for now, but think that the idea of then writing a separate "fly ash" page for general flue gas ash purposes is fine. Feel free to write one. Klbrain (talk) 03:24, 13 December 2023 (UTC)
 * I've added a redirect for now, but think that the idea of then writing a separate "fly ash" page for general flue gas ash purposes is fine. Feel free to write one. Klbrain (talk) 03:24, 13 December 2023 (UTC)

Question about fly ash
The article states that fly ash can be a replacement for cement. Not sure that is true. Did the author mean 'partial replacement'?

Fly ash is a good admixture to cement allowing for reduced percentage of cement to be used. However, Portland cement contains at least 60% CaO, whereas fly ash contains at best around 25% CaO (from sub-bituminous coals) and can be much lower, and is therefore too low to completely replace the majority of cements.

Suggest that the author consider a redrafting of this section. Jerryjoynson (talk) 08:57, 11 June 2024 (UTC)