Filler from crushed aggregate for concrete: Pore structure, specific surface, particle shape and size distribution

被引：69

作者：

Cepuritis, Rolands ^{[1
,2
]}

Wigum, B. J. ^{[3
,4
]}

Garboczi, E. J. ^{[5
]}

Mortsell, Ernst ^{[6
]}

Jacobsen, Stefan ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Struct Engn, NO-7491 Trondheim, Norway

[2] Norcem AS HeidelbergCement, R&D Dept, NO-3950 Brevik, Norway

[3] Norwegian Univ Sci & Technol, Dept Geol & Mineral Resources Engn, NO-7491 Trondheim, Norway

[4] NorStone AS HeidelbergCement, NO-4120 Tau, Norway

[5] NIST, Gaithersburg, MD 20899 USA

[6] NorBetong AS HeidelbergCement, NO-7080 Heimdal, Norway

来源：

CEMENT & CONCRETE COMPOSITES | 2014年 / 54卷

关键词：

Crushed aggregate fines; Pore structure; Absorption; Specific surface area; Size distribution; Particle shape; TOMOGRAPHY; VOLUME;

D O I：

10.1016/j.cemconcomp.2014.03.010

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Characteristics of fine particles (0-125 mu m diameter) from seven different crushed and natural sands from five different Norwegian rock types were determined. The results suggest that the same water absorption values, as determined by EN 1097-6 on coarser sand fractions, can be applied to the fines. The values of specific surface area measurements vary widely between different materials and between different measurement methods. BET measurements seem to be strongly affected by the mineralogical composition (presence of mica) and surface morphology (weathering) of the particles. Specific surface area calculated from the particle size distributions (PSD) is mainly dependent on the precision of the test methods in the size range below about 3-5 mu m, because these small particles contain most of the surface area. Shape measurements by both Dynamic Image Analysis (DIA), which is a 2-D method, and X-ray microcomputed tomography (mu CT), which is a 3-D method, have yielded similar relative length-to-thickness aspect ratios of the particles between different mineralogies, though with lower absolute values for DIA due to 2-D projection of 3-D quantities. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：2 / 16

页数：15

共 52 条

[31] Three-dimensional shape analysis of coarse aggregates: New techniques for and preliminary results on several different coarse aggregates and reference rocks [J].

Erdogan, S. T. ;

Quiroga, P. N. ;

Fowler, D. W. ;

Saleh, H. A. ;

Livingston, R. A. ;

Garboczi, E. J. ;

Ketcham, P. M. ;

Hagedorn, J. G. ;

Satterfield, S. G. .

CEMENT AND CONCRETE RESEARCH, 2006, 36 (09) :1619-1627

[32] Effect of limestone filler BET(H2O)-area on the fresh and hardened properties of self-compacting concrete [J].

Esping, O. .

CEMENT AND CONCRETE RESEARCH, 2008, 38 (07) :938-944

[33] The influence of mineral admixtures on the theology of cement paste and concrete [J].

Ferraris, CF ;

Obla, KH ;

Hill, R .

CEMENT AND CONCRETE RESEARCH, 2001, 31 (02) :245-255

[34] Identifying Improved Standardized Tests for Measuring Cement Particle Size and Surface Area [J].

Ferraris, Chiara ;

Garboczi, Edward .

TRANSPORTATION RESEARCH RECORD, 2013, (2342) :10-16

[35]

Ferraris F.C., 2001, MAT SCI CONCRETE 6, P215

[36]

Franks F., 2000, WATER MATRIX LIFE

[37] Contact function, uniform-thickness shell volume, and convexity measure for 3D star-shaped random particles [J].

Garboczi, E. J. ;

Bullard, J. W. .

POWDER TECHNOLOGY, 2013, 237 :191-201

[38] GEOMETRICAL PERCOLATION-THRESHOLD OF OVERLAPPING ELLIPSOIDS [J].

GARBOCZI, EJ ;

SNYDER, KA ;

DOUGLAS, JF ;

THORPE, MF .

PHYSICAL REVIEW E, 1995, 52 (01) :819-828

[39] Three-dimensional mathematical analysis of particle shape using X-ray tomography and spherical harmonics: Application to aggregates used in concrete [J].

Garboczi, EJ .

CEMENT AND CONCRETE RESEARCH, 2002, 32 (10) :1621-1638

[40]

Koehler E, 2007, 1082F ICAR

← 1 2 3 4 5 6 →