Cement-lateritic gravels mixtures: Microstructure and strength characteristics

被引：44

作者：

Millogo, Younoussa ^{[2
]}

Hajjaji, Mohamed ^{[1
]}

Ouedraogo, Raguilnaba ^{[2
]}

Gomina, Moussa ^{[3
]}

机构：

[1] Univ Cadi Ayyad, Fac Sci Semlalia, Dept Chim, Equipe Physicochim Mat Nat & Phenomenes Interface, Marrakech, Morocco

[2] Univ Ouagadougou, LPCTM, UFR Sci Exactes & Appliques, Ouagadougou 03, Burkina Faso

[3] CNRS, Lab CRISMAT, ENSICAEN, UMR 6508, F-14050 Caen 4, France

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2008年 / 22卷 / 10期

关键词：

lateritic gravels; cement mixes; microstructure; mechanical strength; base course;

D O I：

10.1016/j.conbuildmat.2007.07.019

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Microstructure of cement-lateritic gravels mixes, containing up to 8 wt% cement, was investigated by means of X-ray diffraction, infrared spectrometry, differential thermal analysis, scanning electron microscopy and energy dispersive spectrometry. Also, strength characteristics of the mixtures were measured. The results show that cement admixtures resulted in the formation of 1.4 nm-tobermorite, ettringite, iron oxyhydroxide, portlandite and calcite. The increasing amount of tobermorite, due to the increase of the cement content, was attended with a noticeable reduction of particles segregation. In addition, its marked crystallization, observed for the high curing time (28 days), contributed to the improvement of the mechanical strength. As regards the application aspect, the results show that cement amended lateritic gravels are convenient for base course construction. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2078 / 2086

页数：9

共 32 条

[1] THE EFFECT OF REPEATED LOADING ON THE ULTIMATE UNCONFINED COMPRESSIVE STRENGTH OF A LIME-STABILIZED LATERITE [J].

AKOTO, BKA .

ENGINEERING GEOLOGY, 1986, 23 (02) :125-135

[2]

[Anonymous], 1993, P94051 NF

[3]

Assal HH, 2003, SILIC IND, V68, P55

[4]

Attoh-Okine B., 1990, Construction and Building Materials, V4, P86, DOI [10.1016/0950-0618(90)90006-M, DOI 10.1016/0950-0618(90)90006-M]

[5] LIME TREATMENT OF LATERITE SOILS AND GRAVELS REVISITED [J].

ATTOHOKINE, NO .

CONSTRUCTION AND BUILDING MATERIALS, 1995, 9 (05) :283-287

[6]

Autret P., 1983, LATERITES GRAVELEUX

[7]

Bagarre E., 1990, Utilisation des graveleux lateritiques en technique routiere

[8] Delayed ettringite formation: The effect of temperature and basicity on the interaction of sulphate and C-S-H phase [J].

Divet, L ;

Randriambololona, R .

CEMENT AND CONCRETE RESEARCH, 1998, 28 (03) :357-363

[9] HYDRATION OF PORTLAND-CEMENT CLINKER IN THE PRESENCE OF CARBONACEOUS MATERIALS [J].

DUTTA, DK ;

BORDOLOI, D ;

BORTHAKUR, PC .

CEMENT AND CONCRETE RESEARCH, 1995, 25 (05) :1095-1102

[10]

Gidigasu M.D., 1976, LATERITIC SOIL ENG

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