Alkali-activated concrete with Serbian fly ash and its radiological impact

被引：17

作者：

Nuccetelli, Cristina ^{[1
]}

Trevisi, Rosabianca ^{[2
]}

Ignjatovic, Ivan ^{[3
]}

Dragas, Jelena ^{[3
]}

机构：

[1] Natl Inst Hlth, Technol & Hlth Dept, Viale Regina Elena 299, I-00167 Rome, Italy

[2] Italian Natl Workers Compensat Author INAIL, Dept Med Epidemiol Workplace Occupat & Environm H, Via Fontana Candida 1, I-00040 Rome, Italy

[3] Univ Belgrade, Fac Civil Engn, Bulevar kralja Aleksandra 73, Belgrade 11000, Serbia

来源：

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY | 2017年 / 168卷

关键词：

Fly ash; Blast furnace slag; Alkali activated concrete; Activity concentration; Activity concentration index I; Dose model; BUILDING-MATERIALS; NATURAL RADIOACTIVITY; GEOPOLYMER CONCRETE; CURING CONDITIONS; INDEX;

D O I：

10.1016/j.jenvrad.2016.09.002

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The present paper reports the results of a study on different types of fly ash from Serbian coal burning power plants and their potential use as a binder in alkali-activated concrete (AAC) depending on their radiological and mechanical properties. Five AAC mixtures with different types of coal burning fly ash and one type of blast furnace slag were designed. Measurements of the activity concentrations of K-40, Ra-226 and Th-232 were done both on concrete constituents (fly ash, blast furnace slag and aggregate) and on the five solid AAC samples. Experimental results were compared by using the activity concentration assessment tool for building materials - the activity concentration index I, as introduced by the EU Basic Safety Standards (CE, 2014). All five designed alkali-activated concretes comply with EU BSS screening requirements for indoor building materials. Finally, index I values were compared with the results of the application of a more accurate index - I(pd), which accounts for thickness and density of building materials (Nuccetelli et al., 2015a). Considering the actual density and thickness of each concrete sample index - I(pd) values are lower than index I values. As an appendix, a synthesis of main results concerning mechanical and chemical properties is provided. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：30 / 37

页数：8

共 27 条

[1]

[Anonymous], 2009, 1239032009 CEN

[2]

[Anonymous], 2012, Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete, DOI 10.1520/C0618-17A

[3]

[Anonymous], 45012012 EN

[4]

[Anonymous], 2005, Design of steel structures-Part 1.1: General rules and rules for buildings. EN 1993-1-1:2005

[5]

CEN, 2009, Standard EN 12390-6

[6]

CEN (European Committee for Standardization), 2009, 1235022009 CEN

[7]

CEN (European Committee for Standardization), 2009, 1235062009 CEN

[8] Effect of sodium hydroxide concentration on chloride penetration and steel corrosion of fly ash-based geopolymer concrete under marine site [J].

Chindaprasirt, P. ;

Chalee, W. .

CONSTRUCTION AND BUILDING MATERIALS, 2014, 63 :303-310

[9] Alkali activation of fly ashes.: Part 1:: Effect of curing conditions on the carbonation of the reaction products [J].

Criado, A ;

Palomo, A ;

Fernández-Jiménez, A .

FUEL, 2005, 84 (16) :2048-2054

[10] Alkali activation of fly ash. Part III: Effect of curing conditions on reaction and its graphical description [J].

Criado, M. ;

Fernandez-Jimenez, A. ;

Palomo, A. .

FUEL, 2010, 89 (11) :3185-3192

← 1 2 3 →