Properties prediction of fly ash blended concrete using hydration model

Fly ash and granulated blast-furnace slag, which are used as blends of Portland cement, are waste materials produced in electric and energy industry. Due to excellent durability, low heat of hydration, energy-saving, resource-conserving, and generally less expensive than ordinary Portland cement, blends Portland cements is used increasingly in construction industry. Both ecology benefit and economic benefit can be achieved by using blended Portland cement. Addition of blended components to cement, especially such as fly ash or silica fume, will lead to a densification of the microstructure. The autogenous shrinkage deformation will increase and the following autogenous shrinkage crack will do harm to durability of concrete structure. In this paper, based on the multi-component hydration model, a numerical program is built to predict autogenous shrinkage of ordinary Portland cement and blended Portland cement. The numerical program considers the influence of water to cement ratio, curing temperature, particle size distribution, cement mineral components on hydration process and autogenous shrinkage. The prediction result agrees well with experiment result.

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Prediction of temperature distribution in concrete incorporating fly ash or slag using a hydration model

Composites Part B Engineering ◽

10.1016/j.compositesb.2010.09.017 ◽

2011 ◽

Vol 42 (1) ◽

pp. 27-40 ◽

Cited By ~ 18

Author(s):

Xiao-Yong Wang ◽

Hyeong-Kyu Cho ◽

Han-Seung Lee

Keyword(s):

Fly Ash ◽

Temperature Distribution ◽

Hydration Model

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Sensitivity of solidification hydration model in estimating carbonation of fly ash cement system

Construction and Building Materials ◽

10.1016/j.conbuildmat.2021.122582 ◽

2021 ◽

Vol 282 ◽

pp. 122582

Author(s):

Yuguo Yu ◽

Tianyu Zhang ◽

Qihan Wang ◽

Xiaojun Chen ◽

Di Wu ◽

...

Keyword(s):

Fly Ash ◽

Cement System ◽

Hydration Model

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Characterization of lead-bearing phases in municipal waste combustor fly ash

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100165045 ◽

1996 ◽

Vol 54 ◽

pp. 516-517

Author(s):

L. L. Sutter ◽

G. R. Dewey ◽

J. F. Sandell

Keyword(s):

Fly Ash ◽

Bottom Ash ◽

Municipal Waste ◽

Primary Concern ◽

Leaching Behavior ◽

Waste Combustion ◽

Lead And Cadmium ◽

Lead Speciation ◽

Accepted Practice

Municipal waste combustion typically involves both energy recovery as well as volume reduction of municipal solid waste prior to landfilling. However, due to environmental concerns, municipal waste combustion (MWC) has not been a widely accepted practice. A primary concern is the leaching behavior of MWC ash when it is stored in a landfill. The ash consists of a finely divided fly ash fraction (10% by volume) and a coarser bottom ash (90% by volume). Typically, MWC fly ash fails tests used to evaluate leaching behavior due to high amounts of soluble lead and cadmium species. The focus of this study was to identify specific lead bearing phases in MWC fly ash. Detailed information regarding lead speciation is necessary to completely understand the leaching behavior of MWC ash.

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