干旱区生态环境知识资源中心(Arid): Geotechnical, chemical and mineralogical evaluation of lateritic soils in humid tropical area (Mfou, Central-Cameroon): Implications for road construction

Arid

DOI	10.1186/s40703-014-0001-0
	Geotechnical, chemical and mineralogical evaluation of lateritic soils in humid tropical area (Mfou, Central-Cameroon): Implications for road construction
	Kamtchueng, Brice T.; Onana, Vincent L.; Fantong, Wilson Y.; Ueda, Akira; Ntouala, Roger F. D.; Wongolo, Michel H. D.; Ndongo, Ghislain B.; Ze, Arnaud Ngo'o; Kamgang, Veronique K. B.; Ondoa, Joseph M.
通讯作者	Kamtchueng, BT
来源期刊	INTERNATIONAL JOURNAL OF GEO-ENGINEERING
ISSN	2092-9196
EISSN	2198-2783
出版年	2015
卷号	6 期号:1
英文摘要	Increased cost associated with the used of high quality materials have led to the need for local soils to be used in civil engineering works. In this paper, geo-chemical approaches coupled with conventional geotechnical techniques has been used to investigate vertical and lateral peculiar engineering index properties (EIP) of micaschist derived soils from Mfou, Central-Cameroon for their uses in road construction. The X-ray diffraction (XRD) analysis conducted on the soils indicated the absence of swelling clays. The main mineral phases were quartz, kaolinite, goethite, magnetite and chlorite. Geo-chemical results show that the investigated soils are "true laterites" made up of 41 wt.% of Fe2O3, 35 wt.% of SiO2, 21 wt.% of Al2O3, 1.17 wt.% of K2O and 0.05 wt.% of CaO. The results of geotechnical tests suggest that the upper clayey layer (UCL) and bottom mottled clayey layer (MCL) of the weathering profiles are poorly graded soils with EIP (fines particles (FP) of 61 and 63%, plasticity index (PI) of 30 and 31%, Californian Bearing Ratio (CBR) at 95% of 21 and 19%), which do not allow their use as rawmaterials in road construction whereas, intermediate nodular layer (INL) are well graded soils having EIP (FP of 26%, PI of 26% and CBR of 39%) that meet the specification required for sub-base materials for light traffic roads. The relatively high sesquioxyde present in these residual soils may act as cementing agent, thereby making the compacted soils relatively brittle. The direct shear test results show that the soils have high bearing capacity (cohesion of 62 Kpa and 27.2 degrees angle of internal friction) making them to be useful in slope stability and shallow foundation design. The comparison of the studied soils with some lateritic soils in Sub-Saharan Africa indicates that i) genesis and climatic conditions are potentials factors that influence EIP of lateritic soils, ii) lateritic soils developed under semi-arid conditions exhibits EIP better than those developed under tropicaland sub-tropical conditions.
英文关键词	Lateritic soils Engineering properties Mineralogy Road pavements Humid tropical area Mfou Central-Cameroon
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000215295600001
WOS类目	Engineering, Geological
WOS研究方向	Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/331038
作者单位	[Kamtchueng, Brice T.; Ueda, Akira] Toyama Univ, Grad Sch Sci & Engn Educ, Dept Earth Life & Environm Sci, Gofuku 3190, Toyama 9308555, Japan; [Kamtchueng, Brice T.; Onana, Vincent L.; Ntouala, Roger F. D.; Wongolo, Michel H. D.; Ndongo, Ghislain B.; Ze, Arnaud Ngo'o; Ondoa, Joseph M.] Univ Yaounde I, Fac Sci, Dept Earth & Life Sci, Yaounde, Cameroon; [Fantong, Wilson Y.] Inst Min & Geol Res IRGM, Yaounde, Cameroon; [Kamgang, Veronique K. B.] Univ Yaounde I, Higher Teachers Training Coll ENS, Yaounde, Cameroon
推荐引用方式 GB/T 7714	Kamtchueng, Brice T.,Onana, Vincent L.,Fantong, Wilson Y.,et al. Geotechnical, chemical and mineralogical evaluation of lateritic soils in humid tropical area (Mfou, Central-Cameroon): Implications for road construction[J],2015,6(1).
APA	Kamtchueng, Brice T..,Onana, Vincent L..,Fantong, Wilson Y..,Ueda, Akira.,Ntouala, Roger F. D..,...&Ondoa, Joseph M..(2015).Geotechnical, chemical and mineralogical evaluation of lateritic soils in humid tropical area (Mfou, Central-Cameroon): Implications for road construction.INTERNATIONAL JOURNAL OF GEO-ENGINEERING,6(1).
MLA	Kamtchueng, Brice T.,et al."Geotechnical, chemical and mineralogical evaluation of lateritic soils in humid tropical area (Mfou, Central-Cameroon): Implications for road construction".INTERNATIONAL JOURNAL OF GEO-ENGINEERING 6.1(2015).