LABORATORY AND FIELD EVALUATION OF A-6 LATERITIC SOIL TREATED WITH RECLAIMED ASPHALT PAVEMENT AND ORDINARY PORTLAND CEMENT

Authors

  • Mustapha Mohammed Alhaji
  • Musa Alhassan
  • Taiye Waheed Adejumo
  • Awwal Tanko Umar

Abstract

An A-6 lateritic soil was stabilized with Reclaimed Asphalt Pavement and 2% cement. The
lateritic soil was mixed with 0, 20 to 140% RAP and each mixture compacted in the laboratory. The soil
mixed with120% RAP gave the highest Maximum Dry Density of 2.252Mg/cm3
. Laboratory California
Bearing Ratio test was conducted on the soil, soil/120% RAP and soil/120% RAP/2% cement. A 15m section
of untarred road was identified and demarcated into three sections (A, B and C) of 5.0m each. Materials on
section A of the road composed of the lateritic soil/120% RAP/2% cement, section B contains lateritic
soil/120% RAP, while section C composed of the lateritic soil only. The sections were compacted using
smooth drum vibratory roller. In-situ density test and CBR test using Dynamic Cone Penetration test were
carried out on the three sections of the road after 1, 7, 14, 28, 60 and 90days. The laboratory densities of
materials used for the three sections are 2.254, 2.252 and 2.154g/cm3
, while in-situ densities after 60 days
were 2.249, 2.225 and 2.142Mg/cm3 for sections A, B and C respectively. The laboratory CBR values after
60 days were 118, 37 and 22%, while the field CBR values were 44.5, 49.0 and 112% for sections A, B and
C respectively. It was concluded that in-situ and laboratory densities and CBR values closely agreed.
However, the maximum densities were observed after 60days of field compaction. Also, only 90% of in-situ
dry density was achieved immediately after the field compaction.

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Published

2019-06-10

How to Cite

Mustapha Mohammed Alhaji, Musa Alhassan, Taiye Waheed Adejumo, & Awwal Tanko Umar. (2019). LABORATORY AND FIELD EVALUATION OF A-6 LATERITIC SOIL TREATED WITH RECLAIMED ASPHALT PAVEMENT AND ORDINARY PORTLAND CEMENT. GEOMATE Journal, 17(63), 360–370. Retrieved from https://geomatejournal.com/geomate/article/view/2605

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