Journal of Emerging Trends in Engineering and Applied Sciences: Research Areas

Abstract:
Portland Limestone cement (PLC) recently introduced into the Nigerian market, was received with mix reaction amongst professionals in the construction industry, due to absence of empirical data on its performance. To ascertain its suitability for use in soil stabilization, the effect of PLC grades 32.5 N and 42.5 R on the strength indices of laterite was investigated. Latertie sample obtained from Ikpayongo was treated with 0, 2, 4, 6, 8, 10 and 12 % of both grades of cement by dry weight of laterite. Atterberg�s limits, compaction, unconfined compression strength (UCS), California bearing ratio (CBR) and durability tests were conducted on samples of laterite treated with the two grades of cement. Strength indices of laterite treated with the two grades of cement was assessed using CBR and UCS test results. 7 day UCS value of laterite increased from 502 N/mm2 to 1275 N/mm2 and 1357 N/mm2, when treated with 12 % PLC grade 32.5 N and 42.5 R respectively. CBR value of laterite increased from 20 % to 185 % and 210 % when treated with 12 % PLC grade 32.5N and 42.5 R respectively. Result of tests indicates that higher strength values were obtained with PLC grade 42.5 R when compared with grade 32.5 N. It also provided empirical evidence on the suitability of PLC for use in soil stabilization. PLC grades 42.5 R is recommended for use in soil stabilization based on strength and cost. Outcome of the research will be beneficial to professionals in the construction industry and manufacturers of cement.

Keywords: portland limestone cement, laterite, strength indices, stabilization, Grades

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