A Fundamental Study to Develop Low-CO₂･High-Insulation Lightweight Concrete Using Bottom Ash Aggregates and Air Foam

Four bottom ash samples from the Power Units of the Agios Dimitrios Power Plant were studied by the method of PXRD to determine their semi-quantitative mineralogical composition. Their organic matter content was calculated by a wet chemical process. Also, the loss on ignition was measured. The samples are constituted mainly of calcite, quartz and feldspars, while micas, clays, gehlenite and portlandite were determined in a few samples in smaller quantities. The amorphous material varied between 10-43 wt. %, while organic matter varied between 5-42 wt. %. Measurements of the loss on ignition overestimate the unburned lignite contents in the bottom ash samples. The management of bottom ashes with high contents of unburned lignite should differ to that of the fly ashes. The oxidation of the inorganic compounds of the unburned lignite may lead to environmental degradation of the landfill areas. Samples showing lower values of organic matter are suitable for a series of uses, such as: snow and ice control, as an aggregate in lightweight concrete masonry units,as a raw feed material for portland cement, as an aggregate in cold mix emulsified asphalt mixes, base or sub-base courses, or in shoulder construction. Systematic study of the unburned lignite of bottom ashes is needed for possible re-combustion.

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00/02500 Lightweight concrete with bottom ash. Radiological aspects

Fuel and Energy Abstracts ◽

10.1016/s0140-6701(00)96413-0 ◽

2000 ◽

Vol 41 (5) ◽

pp. 281

Keyword(s):

Lightweight Concrete ◽

Bottom Ash

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Reviews on the Properties of Aggregates Made with or without Geopolymerisation Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.626.892 ◽

2012 ◽

Vol 626 ◽

pp. 892-895 ◽

Cited By ~ 4

Author(s):

Rafiza Abd Razak ◽

Mohd Mustafa Al Bakri Abdullah ◽

Kamarudin Hussin ◽

I. Khairul Nizar ◽

D. Hardjito ◽

...

Keyword(s):

Fly Ash ◽

Mechanical Testing ◽

Lightweight Concrete ◽

Raw Material ◽

Lightweight Aggregates ◽

Ash Aggregates

Aggregates are popular for use in concrete and lightweight concrete applications. Recent research shows that the by-product materials such as fly ash can be used as raw material in producing aggregates and lightweight aggregates. The usage of this material can improve the quality of the aggregates produced compared to conventional in term of structurally strong, physically stable, durable, and environmentally inert. This paper summarized the process and mechanical testing on the fly ash aggregates and lightweight aggregates to be used in concrete.

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Mechanical and Durability Characteristics of Rainwater Penetration and Retention Pavement Concrete Blocks Incorporating Bottom Ash Aggregates

Korean Society of Hazard Mitigation ◽

10.9798/kosham.2020.20.5.195 ◽

2020 ◽

Vol 20 (5) ◽

pp. 195-205

Author(s):

Hwang-Hee Kim ◽

Ri-On Oh ◽

Jae-Young Lee ◽

Sung-Ki Park ◽

Sang-Sun Cha ◽

...

Keyword(s):

Bottom Ash ◽

Experimental Tests ◽

Fine Aggregate ◽

Replacement Ratio ◽

Slip Resistance ◽

Concrete Blocks ◽

Target Performance ◽

Design And Manufacture ◽

Ash Aggregates ◽

Pavement Concrete

In this study, the mechanical properties and durability of rainwater penetration and retention pavement concrete blocks incorporating bottom ash fine aggregate were investigated to develop pavement concrete blocks that could reduce the rainwater leakage of impervious concrete structures. Pavement concrete blocks were prepared by replacing 0%, 10%, and 20% of the weight of natural fine aggregate with bottom ash fine aggregate for 410 and 450 kg/m<sup>3</sup> cement contents. Experimental tests were conducted to determine the compressive strength, flexural strength, abrasion resistance, slip resistance, freeze–thaw resistance, and permeability coefficient of the pavement concrete blocks. Pavement concrete blocks produced with a cement content of 450 kg/m<sup>3</sup> and a 10% replacement ratio of bottom ash fine aggregate satisfied the target performance and exhibited the best overall performance. Theseoptimal mix parameters were applied in this study to design and manufacture pavement concrete blocks for rainwater penetration and retention that satisfied the target performance.

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