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Recycled concrete and fly ash make calcium silicate bricks

✍ Scribed by Torben C. Hansen; Henrik Narud

Book ID
102998999
Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
153 KB
Volume
13
Category
Article
ISSN
0008-8846

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✦ Synopsis

It has been shown that calcium hydroxide from hydrated cement reacts with fly ash and siliceous particles in the crusher fines of recycled concrete to give calcium silicate products similar to sand-lime bricks when autoclaved. Such products achieved compressive strengths up to 12.5 MPa.

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Recycled concrete and silica fume make c
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✍ Torben C. Hansen; Henrik Narud πŸ“‚ Article πŸ“… 1983 πŸ› Elsevier Science 🌐 English βš– 240 KB

When old concrete is crushed to coarse aggregate for production of new concrete, approximately 20 weight percent of crusher fines are generated. It has been shown that calcium hydroxide from hydrated cement of such fines reacts in the autoclave with siliceous particles in the fines to give calcium

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## Abstract A comparative study of the chemical composition, mineralogy, morphology and crushing strengths of fly ash bricks, conventional concrete bricks and fly ash samples has been undertaken. The main chemicals present in the products were silica and alumina while their main minerals were quart