Fly Ash Use in Road and Embankment Construction: A Goa Workshop

- Panaji, Goa

Another successful workshop, organized by AsianCAA and hosted by our friends at ALCON (Anil Counto Enterprises) took place in Goa, India during the globally prestigious CoalTrans India conference.

The speaker, Mr. Bill Martin, is an experienced operations, sales and marketing executive with decades of experience in the construction materials industry. Bill’s expertise covers raw materials procurement, supply chain management, new business development and manufacturing operations in cement, masonry and concrete products.

Bill has held positions at the ADAA (Ash Development Association of Australia) and the Concrete Masonry Association of Australia.

A regular at the annual Asian Coal Ash Association’s Coal Ash Asia conferences, Bill and the team at CAS (Coal Ash Solutions) team offer complimentary introductions, translation and business matching to all international guests in attendance.

The Workshop:

Explored in “Fly Ash Use in Road and Embankment Construction” were some of the technical, environmental and operational requirements for achieving maximum benefits from fly ash in road and embankment construction.

In attendance at the workshop were ash managers, construction and engineering firms, government officials including the Department of Transport and the Ministry of Environment. 

The group examined the many benefits of incorporating fly ash and bottom ash into Portland Cement/Concrete. Extensive research and countless highway and bridge construction projects have indisputably proven the following facts about the use of fly ash in construction:
1. Higher ultimate strength

2. Improved workability

3. Lowered costs

4. Reduced bleeding

5. Reduced heat of hydration

6. Reduced permeability

7. Increased sulfate attack resistance

8. Increased resistance to ASR

9. Reduced shrinkage

10. Increased durability.

AsianCAA hosts and organizes multiple workshops and conferences throughout the year. To find out more about our next event, enter your email below and we will send you more information.

AsianCAA to Attend and Participate in Coaltrans India 2018

- Goa, India

Asian Coal Ash Association Chairman, Mr. David Harris, and fellow AsianCAA members will be in attendance at this year’s CoalTrans India conference this February 12-14, 2018 at the Hyatt Goa in Goa, India.  

Mr. Harris will host a panel on international ash trade during the conference that will be attended by the conference's over 600 guests, from India and around the world. Attendees will review and exchange knowledge surrounding domestic production and competitive green alternatives. India’s Coal sector has been under scrutiny and vast reform for many years and is confronting an era of change.

For more information on Coaltrans India 2018 or information on upcoming Asian Coal Ash Association hosted or supported events, please click the links below.

Autoclaved Aerated Concrete: CCPs Growth in Asia Pacific

Between 2015 and 2021, the global autoclaved aerated concrete market is expected to increase by just under $2 billion USD.  AAC is increasing in industry wide use due to its light weight and versatility. The construction material consists of fly ash and gypsum, both biproducts of burning coal to make energy, and much less costly than their alternatives, sand and anhydrite.  The material also consists of lime, cement, and aluminum powder. Construction companies are increasing their use of this material as it is not only more cost efficient, but also provides wider durability to seismic fluctuation, intense heat, and pests. The material itself also saves the manufacturer or construction company in water and energy usage.  Autoclaved aerated concrete is widely used in Europe and North America.

AAC materials can either be used instead of or to repair common building materials. Application can be seen in most real estate areas including residential, industrial and commercial. However, the majority of the AAC market has been residential since its inception, and continuing throughout 2017 with a third of the overall market. The product types of autoclaved aerated concrete are distributed into tiles, panels, blocks, lintels and others.

The growing market is propelled by elements such as the increased importance of utilizing green building materials, the use of recycled materials themselves (fly ash, etc), and its superiority to commonly used materials for the same purpose.

Currently, limited adoption is due to high start up costs associated with AAC, and because manufacturing facilities are not yet commonplace, resourcing and logistics becomes problematic.

As adaptation grows however, and infrastructure is set in place, the forecast for AAC paneling is projected to grow almost 8% in the next 5 years.

Globally, Europe has lead in market consumption. However, the Asia Pacific region, including countries like China, Thailand, Malaysia, Singapore and Indonesia are expected to increase consumption by over 10%, also within the next 5 years.

Opportunities in the AAC market are real as there is strong interest in China, India and other densely populated regions who would benefit from disaster resistant structures made from coal combustion products (CCPs).

To read more about autoclaved aerated concrete construction, trends, and forecasts for investment and integration, please read Orbis Research’s report:  Global Autoclaved Aerated Concrete (AAC) Market-Segmented by Type, Application (Construction), and Geography-Trends and Forecasts (2017-2022). Follow the link in the text for more information.

To learn more about global trends and research on AAC and CCPs, join us at Coal Ash Asia 2018.

Research Highlight: Technology for Extracting Alumina from Fly Ash and Research on Acid/alkali Double Circulation

- Beijing, China

During Coal Ash Asia 2017 this past July, there was substantial discussion surrounding alumina extraction from coal/coal ash and strategies for making the processes practically adapted. Professor Jiang Xun Xiong of Beijing General Research Institute of Mining & Metallurgy posited research concerning the processing and separation of the alumina from fly ash. Below is the abstract of the research provided at CAA2017. Beijing General Research Institute of Mining & Metallurgy have continued to be loyal participants in our annual events, and are committed to efficient technology integration and environmental protection.

BGRIMM is analyzing development and current status about alumina extracted from high-aluminum powder fly ash, and taking subjective analysis for current typical processes in China. Processes include energy consumption, material consumption, three-wastes, product quality. Discussing bottlenecking and development trends for extracting alumina from fly ash, and proposing fly ash conversion using sulfur acid. Will explore the process’ reactions and decomposition, low-temperature alkaline sink and two circulations for alumina extraction. The study results confirm two circulations for acid and alkaline are needed.

To find out more about this research, and research like it, join us at Coal Ash Asia 2018, and join the ongoing discussion and seminars surrounding the topics of metal extraction and alumina extraction specifically.

Transforming Real Estate Sector: Sustainable Construction Techniques

-Beijing, China

Urban housing models are now more of a destiny than a trend for the average person in the most populated parts of Asia, China and India. In the developing world, people increasingly flock to high-density living areas as they have easier access to commerce, healthcare and other amenities. The building materials industry’s infrastructure in Asia for trade and manufacturing has only reached a reasonable application of green building materials model within the past decade or so. The shift in lifestyle and housing infrastructure has led to concerns over energy, and carbon footprint. Researchers are concerned that the concrete, cement, etc, used in the making of modern high density living apartments is to blame for a large part of the pollution produced by these regions.

Almost a quarter of India’s CO2 emissions come from residential and commercial real estate construction. Increased growth in China and India, two industry giants, contribute greatly to the global carbon footprint. In India, 20% of water and 30% of natural materials are used in the construction and building materials industries.

Mr. Jack Yuan from the Institute of Technical Information for the Building Materials Industry in Beijing says that contamination and erosion of earth and air caused by dust and asbestos are hazardous byproducts of construction activities.  The team at ITIBMI, operating under the China Building Materials Academy, researches sustainable and progressively green infrastructure, while keeping in mind the cost and benefits of efficiency. “Nowadays the economic benefits can be seen through water and energy efficiency, with most green technologies focusing on the conservation of water, power and natural materials. ”

Yuan goes on to site specific technologies on the market, focusing on city specific construction. “ Pre-cast, reinforced hollow concrete blocks/ paneling made from fly ash, or Glass fiber Reinforced Gypsum (GFRG) walling, are a few examples of modern housing construction technologies. Efficiency in time, energy, cost and supplies will continue to propel the industry through innovation. “

Construction companies are increasingly embracing technologies consisting of fly ash and gypsum. These bi-products can be locally sourced and inexpensive because transportation costs are low.  Coal fired power stations and factories are selling them at a low cost to keep up with landfilling and other environmental regulations, making exporting/importing of fly ash another viable options for companies without local sources.

Issues arise logistically when construction and building material manufacturers are far from these resources or do not have the infrastructure in place to get the product from power station to manufacturing facility. As the world transitions to green energy, including solar and wind technologies, some countries have been forced to import bulk ash from producing countries. To read more about this logistical issues and trends, please be sure to read our upcoming newsletter, due out at the end of 2017. To be put on our newsletter mailing list, please click the link on the main page.

 

China Coal Combustion Product Conference: Technological Innovation to Promote Green Development

- Shuozhou City, Shanxi Province, China

The Asian Coal Ash Association would like to thank all who participated in CICCPC 2017, the most recent international exchange in Shuozhou. This year’s topics focused on fly ash and desulfurized gypsum, with the theme "Technological Innovation to Promote Green Development". During the two day event participants engaged in technical exchanges on comprehensive utilization of fly ash and gypsum and discuss the latest scientific research.

One goal of the conference was to further strengthen international and domestic cooperation to promote technological progress and industrial development. Experts from the U.S.A, Germany, Australia, Canada, Ukraine and Japan were among the 700 participants at this year’s event.

The conference was jointly organized by AsianCAA, the National Institute of Building Materials Industry Information, Shuozhou Municipal People's Government, and the Shanxi Economic and Information Commission.  Mr. David Harris, the chairman of the Asian Coal Ash Association gave keynote and regular session speeches during the proceedings. Mr. Harris outlined coal ash and other solid waste utilization technologies, international trade status’ and industry development prospects.

In conjunction with the regular plenary session, was a product/technology exhibition and academic poster display. A variety of specialized meetings also took place at CICCPC. The meeting of the National Coal-based Solid Waste Resource Industry Technology Innovation Strategic Alliance took place for the first time during proceedings. There was a Fly Ash Intelligent Sales Control System meeting as well as a special Green Building Materials and Construction Technology exchange. The Ceramic Association business forum convened during the 23rd of September and  Shuozhou City Investment Promotion and Tourism Promotion gave a special inside look into regional operations. Guests were also able to enjoy an afternoon of horse racing at Youyo County and many other networking opportunities.

Discussing Free CaO in CFB Ash and it’s Stability: Research Highlight from Coal Ash Asia 2017


- Beijing, China

Professor Qiao Xiu Chen from East China University of Science and Technology joined the discussion at Coal Ash Asia this past July 21-24 in Beijing, China. Prof Chen presented among industry leaders during the Fly Ash and Coal Gangue Track at the most recent AsianCAA event. The below abstract has been translated from its original submission to our proceedings.

Abstract: Circulating fluidized bed (CFB) boilers discharge 2 to 3 times as much ash per 1 kWh as pulverized coal-fired boilers. Overall, the amount of discarded CFB ash has drastically increased in China. However, there is no bulk utilization due to the different physiochemical properties of coal fly ash (CFA) from pulverized coal-fired boilers. One of the key issues is the amount of CaO left after burning, as CaO has negative effects on the soundness of cement. The national standard requires the maximum free CaO of 1% for F CFA and 4% for C CFA. The amount of lime in CFB ash is usually higher than 5% due to the desulfurization process. The utilization of CFB ash becomes harder when ash contains higher amounts of CaO. Presentation Abstracts

This conference we will show the chemical reaction variations of lime prepared at 800, 850, 900, 950, 1000, 1050, 1150, 1250, 1350°C. The calorimetry, precise measurement of lattice parameter and selected area microdiffraction of TEM were used for evaluation. The results showed that the calcite with a fineness of D100<76μm decomposed by 80% after the treatment at 800 or 850°C for 20 min. Complete decomposition occurred from the treatment at 900°C for 10 min. The maximum amount of CaO was 0.53% after the treatment at 1050°C. The amount of CaO started to be higher than 1% from the treatment at 1150°C and was more than 30% after the treatment at 1350°C for 20 min.

The CFB ash does not show a negative effect on the soundness of cement when the highest combustion temperature in the boiler is lower than 1050°C.

China International CCP Conference (CICCPC) 2017 - September 23-24

- Shuozhou City, Shanxi Province, China

AsianCAA is proud to continue the partnership and collaboration with the Shuozhou government by bringing the China International CCP Conference to Shuozhou City, Shanxi Province, China, this September 23-24, 2017. The conference is expected to welcome over 500 domestic and international industry participants. The two day event will include oral presentations, multiple exhibitions (products and services exhibition, and research poster exhibition), as well as a local industry tour to one of Shuozhou’s fine milling facilities.

This year’s topics of discussion will be:

  1. Fly ash high value utilization and disposal
  2. Fly ash based Geopolymers
  3. CFB coal ash utilization
  4. Cement and concrete
  5. FGD gypsum high value utilization
  6. Coal ash application in prefabricated construction
  7. Coal ash domestic and international trade

Who should attend?

  • Power station managers
  • Ash and other CCP managers
  • Researchers & Academic institutes
  • Building material manufacturers
  • Non-government agencies
  • Logistics providers
  • Industry related media
  • Equipment manufacturers
  • Investors
  • Government officials

Become a part of our prestigious list of industry leaders.  Participants receive simultaneous translation during all presentations and a dual language handbook including all proceedings.

Honored Guests Include:

  • Wozungithathe Business Enterprise (South Africa)
  • Peking University
  • Tsinghua University
  • East China University of Technology
  • Shanxi University
  • Chinese Academy of Sciences
  • China Building Materials Academy
  • National Institute of Clean and Low Carbon Energy
  • Shenhua Group
  • Datang Group
  • Shanxi Energy Group
  • Datong Coal Mine Group
  • Sinoma Tianjin
  • Huarun Group
  • Shandong Huajian Warehousing Equipment Co.,Ltd
  • Weifang Alpha Equipment Co.,Ltd

Registration includes all meals, domestic travel and lodging during the days of September 22nd to the morning of the 25th. To inquire about speaking positions, exhibitor opportunities or general admissions please enter your information below and our event team will contact you.

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Please tell us how you would like to get involved at CICCPC

High Value-added Utilization of Coal-Related Solid Wastes

Dr. Li Hui Quan, a researcher at Chongqing University recently presented at the recent Coal Ash Asia conference in Beijing, China from July 21-24, 2017. The following is the fully translated abstract of their research. For more information, or to contact this researcher please contact the team at Asian Coal Ash Association.

Thermal power generation is an important component of Chinese energy. Shanxi and Inner Mongolia are regarded as the most important energy bases of China. Large amounts of coal gangue, fly ash, desulfurization gypsum and waste denitration catalyst emerge during the processes of coal mining and coal to electricity conversions. This causes terrible environmental problems due to the low waste utilization ratio. Many metal elements such as Al, Li and Ga, enrich coal-related solid wastes. Our team proposes a theoretical system of the mild separation of active components, the coordinated control of mineral structure and the step by step extraction of associated elements.

We found key technologies of the mild activation by proton acid and deep desilication of silicon, the extraction of alumina by sub-molten salt, the selective adsorption and separation of rare metals, and the directional conversion of silicon resources. The technical system of utilizing alumina & silicon, the step by step extraction of associated elements and the clean recycling & carrier generation of waste denitration catalyst are established. A 3000 tons / annual experimental production line of Al-Si composite from high-alumina fly ash by deep desilication process has been built. The Al-Si composite can replace 80 Bauxite sinter. The establishment of this technical system should be standard practice for the new recycling economy pattern of energy output; low emissions and material preparation, forming green, intelligent and cyclic factories with high resources and ecology amalgamation.