Collapse settlement behaviour of remoulded and undisturbed weathered quartzite

Abstract: The behaviour of semi arid residual soils derived from the weathering of Johannesburg quartzite are difficult to predict because of their heterogeneous particle constitution and weakly bonded structure..

Railway Foundation Properties of Some South African Quarry Stones

Abstract: Railway ballasts are broken pieces of hard rock within the grain size range of 25mm - 60mm, over which the railway tracks are laid. Quarries in dolerite, greywake, shale, pebbles and granitic rock formations are some of the major sources of large stones that may be selected as railway ballast based on a range of properties. Flakiness index, Roundness, sphericity and shape factor, and Los Angeles Abrasion indices of samples of the five rock types were determined..

Effect of desiccation on the geotechnical properties of lime-fly ash stabilized collapsible residual sand

Abstract:Berea Red Sands underlying most of the Kwazulu Natal midlands and coastal plain is a very recent unconsolidated, weakly cemented red to brown, collapsible sands. The effect of wetting and drying cycles on the Unconfined Compressive Strength (UCS) and California Bearing Ratio (CBR) of compacted and cured samples of stabilized Berea Sands was investigated. Different sample mix were prepared with 4% and 8% Lime and 0%, 6% 12% and 18% Fly Ash, and tested after 4, 8 and 12 cycles of wetting and drying..

Compaction and Strength of Lime – Fly Ash Stabilized Collapsible Residual Sand

Abstract: Berea Red Sands are weakly bonded residual collapsible sands underlying significant portions of the west coastal plain of South Africa. Freshly quartered samples of Berea Sand mixed with 4% and 8% Lime as stabilizers and 0%, 6%, 12% and 18% Fly Ash as additive by weight of the dry soil, were compacted and cured for 7 days, 28 days and 56 days. At different stages of curing, some samples were tested to determine their Unconfined Compression Strength (UCS) and California Bearing Ratio (CBR)..

The geotechnical and microstructural properties of desilicated fly ash lime stabilised expansive soil

Abstract: Please refer to full text to view abstrac

Profiling Of Contraceptive Acceptors And Services In A Secondary Health Care Facility In The Niger Delta Region Of Nigeria

Background: Increase in contraceptive uptake is a key strategy to reduce unplanned pregnancy and maternal mortality. Reviews of contraceptive uptake and services provide data for assessing progress. Method: A five year review of contraceptive acceptors and service at the Central Hospital, Warri. Results: A total of 528 contraceptive acceptors were seen during the 5 year period. The mean age was 34.2+ 2.3 years. More clients practiced contraception for child spacing (56.4%) than for limiting family size (39.8%). The IUCD, Hormonal Injectables, pills and condoms were available for clients. The IUCD was the preferred contraceptive accepted. Age and parity but not education were significantly associated with type of contraceptive chosen. Conclusion: The range of contraceptives offered clients needs to be expanded and the information management systemimproved.Key words: Clients, contraceptives, Niger-Delt