All World of Coal Ash presentations from 2005 to PRESENT are catalogued and available in a user-friendly, searchable directory online. With over 1,500 papers downloaded by users worldwide, this upgraded platform is designed to enhance accessibility and engagement.
The World of Coal Ash – affectionately called WOCA – is the premier international conference on the science, application, and sustainability of coal combustion products. WOCA is hosted by the American Coal Ash Association (ACAA) and the University of Kentucky Center for Applied Energy Research (UK CAER). The 2024 conference is the 10th joint biennial meeting with a focus on the science, applications and sustainability of worldwide coal combustion products (CCPs) as well as gasification products.
The new platform includes an automated feature that emails authors monthly regarding usage and access statistics of their work, keeping you informed about the impact your research is making. If you're an author receiving these updates, it’s a fantastic opportunity to see how your contributions are shaping discussions in the field.
You can now navigate the website's presentation storage structure in the Ash library, searching by year from 2005 to 2024. Simply select a year, then a day of the week for the specific group of articles you're interested in and view the full program for that day. Choose a single presentation to see a summarised description, and access the full presentation by selecting its title.
A close view of one presentation from WOCA 2024, available through the Ash Library is Tufts University’s - Chris Swan, and his presentation on ‘Compressive Strengths of Various Mortar Mixed Containing Synthetic Lightweight Aggregate’.
The succinct summary reads as follow: Compressive Behavior of Various Mortar Mixes Containing Synthetic Lightweight Aggregate Authors Prof. Chris Swan - United States - Tufts University Abstract. This paper presents strength and small strain results of mortar concrete mixes, some of which contained synthetic lightweight aggregates (SLAs) – a construction material created from waste plastic and coal fly ash. Twelve mortar mixes were created using a sand-size aggregate that satisfied ASTM’s standard C33 gradation for fine aggregate; i.e., aggregate particles ≤ 4.75mm in size. A 3-by-4 matrix for mix designs was developed; i.e., three different water-to-cement (w/c) ratios of 0.45, 0.55, and 0.65 were used to create concretes with four different SLA contents; 0, 6.67%, 15.6%, and 31.1%.
Uniaxial compression tests, outfitted with an on-specimen device to capture small strain measurements, were performed on two to three specimens of each mixture. Testing was performed after 28-day curing. In summary, the peak strength (f’c) of the 0%-SLA-content concretes decreased as the w/c ratio increased; from a peak of 47.4 MPa for a w/c=0.45 to 31.7 MPa for w/c=0.65. At each w/c ratio, as the SLA content of the concrete increased, the peak strength also decreased. Both of these behaviors/trends were as expected, having been found in previous research.
The measured Young’s moduli of the concretes showed a tendency to decrease as the strength decreased with w/c ratio and/or SLA content, but the rate of moduli decrease was greatly reduced as SLA contents increased, with the rate becoming near zero at SLA contents of 31.1%. Additionally, the results indicated at lower w/c ratios, the moduli could increase for small SLA contents (≤ 6.67%), though the f’c would decrease for such concretes. It is apparent that the presence of SLA does have an impact on the small strain behavior of concretes, at times counter to that of a change in w/c ratio. Future studies will further examine these moduli phenomena.
To read further into his work, and see the presentation in full follow the link here.
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https://uknowledge.uky.edu/woca/