PSI - Issue 70

Vinod Kumar et al. / Procedia Structural Integrity 70 (2025) 303–310

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A2 series. BDC varied from 5% to 50%, while CP varied from 7 days, 14 days, and 28 days. A cylindrical sample with a diameter of 38 mm and a length of 76 mm was prepared for the entire test series. Before preparing the soil sample of the desired size, a mix of the soil and admixtures was ready first. All the samples were prepared at the maximum dry density (MDD) and optimum moisture content (OMC). The soil sample was mixed with cement to prepare it, and dry soil and cement were taken. The amount of cement was decided based on the cement content (CC), which was defined as the ratio of the weight of the cement to the weight of the dry soil. The expression for the CC can be written as follows. = ℎℎ ℎ ℎ 100 (1) For the preparation of the soil mix with BKD, the desired amount of BKD was taken based on its content. BKDC was defined as the ratio of the BKD's weight to the soil's dry weight. The expression for BKDC can be written as follows. = ℎ ℎ ℎ ℎ 100 (2) Similarly, the desired amount of individual admixtures was taken for the soil mixed with double admixture or all the admixtures. After this, they were mixed in dry conditions to achieve uniform mixing. After this desired amount of water was added, the cylindrical soil sample of the desired size was prepared with the help of a mold. For this purpose, the mix was placed in the mold in layers and compacted. After this prepared sample was placed in the UCS testing setup, the test was performed as per IS 2720 (part 10). Fig. 2 shows the photographic view of the test setup, the soil sample, and the sample after failure.

Table 2. Details of the series of the test Test series Details of the mix

Variables

A1 A2 A3 A4

Soil

-

Soil + Cement

CC= 2%, 4% & 6% CP 7 Days, 14 Days & 28 Days

Soil + Brick-kiln Dust

BDC= 5%, 10%,15%, 20%, 30%, 40 % & 50%

Soil + Cement + Brick-kiln Dust

CC= 6%, BDC= 5%, 10%,15%, 20%, 30%, 40 % & 50% CP 7 D, 14 D & 28 D

(a) Test setup with sample

(b) Prepared sample

(c) Sample after failure

Fig. 2. Photographic view of test setup, test sample and test samle after failure