The environments of tropical regions favour the activities and growth of termitaria on soils and woods. The aim of this study is to determine the effect of pretest drying conditions and sawdust ash (SDA) on the strength properties of termite reworked soil for pre and post engineering construction. Twelve disturbed subsoil samples; six termite reworked soil samples and six neighboring residual soils of each of the termite reworked soils were obtained in Akungba Akoko, South-western Nigeria. The termite reworked soil and the surrounding residual soil met the Nigeria requirement of a good sub-grade soil. However, termite reworked soil shows better geotechnical ratings when compared to the surrounding residual soil samples. This result attested to the fact that termites’ activities promote forces of attraction and adhesion among the soil particles. On the addition of sawdust ash to termite reworked soil at 6% of the weight of the soil samples; the geotechnical properties of the termite reworked soils slightly improved. Again, the geotechnical properties of termite reworked soils were considered under varying pretest drying conditions; of air-dried condition as well as conditions obtained by drying the soils at 50°C ± 5, 75°C ± 5 and 110°C ± 5. The index and strength properties of the termite reworked soils improved with increase in pretest drying temperature. Statistical analysis of ANOVA shows that there is no significant statistical difference in the values of the geotechnical parameters of the sampled soils under pretest drying conditions. For Pearson’s correlation, SDA improved soil and pretest drying temperatures for fine contents with CBR and MDD values; the obtained test values of correlation are higher than the critical r value (0.497). Again we reject null hypothesis in favour of the test hypothesis.

热带地区的环境有利于白蚁在土壤和树林中的活动和生长。本研究的目的是确定预试验干燥条件和木屑灰分 (SDA) 对工程施工前后白蚁改造土壤强度特性的影响。十二个扰动的底土样品；在尼日利亚西南部的 Akungba Akoko 获得了六个白蚁再加工土壤样品和每个白蚁再加工土壤的六个相邻残留土壤。白蚁改造后的土壤和周围残留的土壤满足了尼日利亚对良好路基土壤的要求。然而，与周围的残留土壤样本相比，白蚁改造的土壤显示出更好的岩土工程等级。这一结果证明了白蚁的活动促进了土壤颗粒之间的吸引力和粘附力这一事实。将木屑灰按土样重量的6%添加到白蚁改造土中；白蚁改造土壤的岩土特性略有改善。同样，在不同的预试验干燥条件下考虑了白蚁改造土壤的岩土特性；空气干燥条件以及在 50°C ± 5、75°C ± 5 和 110°C ± 5 下干燥土壤获得的条件。白蚁改造土壤的指数和强度特性随着预干燥温度的升高而提高. 方差分析统计分析表明，在预试验干燥条件下，采样土的岩土参数值无显着统计差异。对于 Pearson 相关性，SDA 改进了土壤和预测试干燥温度以获取具有 CBR 和 MDD 值的精细内容物；得到的相关性检验值高于临界r值（0.497）。我们再次拒绝原假设，支持检验假设。