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Q2 Sand cone replacement test method was conducted to determine the density during the construction of the road base layer. The result of the test is shown in Table 2(a) and 2(b). As a project engineer, you need to identify either the compaction effort for the construction of this road base layer comply or not to the Specifications of Roadwork by Public Work Department (JKR 2008). According to the road work specification (JKR 2008), the road base layer must be compacted at least 95% of Maximum Dry Density. Based on your finding, put your comment about the obtained result Table 2(a): Density test result Table 2(b): Moisture content test Bulk density, pb 1939.67 kg/m Mass of tray 1.65 g Mass of tray + soil 2.65 g Maximum Dry Density (MDD) 1760.00 kg/m3 Mass of tray + dry soil 2.50 g

Q2 Sand cone replacement test method was conducted to determine the density during the construction of the road base layer. The result of the test is shown in Table 2(a) and 2(b). As a project engineer, you need to identify either the compaction effort for the construction of this road base layer comply or not to the Specifications of Roadwork by Public Work Department (JKR 2008). According to the road work specification (JKR 2008), the road base layer must be compacted at least 95% of Maximum Dry Density. Based on your finding, put your comment about the obtained result Table 2(a): Density test result Table 2(b): Moisture content test Bulk density, pb 1939.67 kg/m Mass of tray 1.65 g Mass of tray + soil 2.65 g Maximum Dry Density (MDD) 1760.00 kg/m3 Mass of tray + dry soil 2.50 g

Principles of Geotechnical Engineering (MindTap Course List)
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter6: Soil Compaction
Section: Chapter Questions
Problem 6.17P
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Q2 Sand cone replacement test method was conducted to determine the density during the construction of the road base layer. The result of the test is shown in Table 2(a) and 2(b). As a project engineer, you need to identify either the compaction effort for the construction of this road base layer comply or not to the Specifications of Roadwork by Public Work Department (JKR 2008). According to the road work specification (JKR 2008), the road base layer must be compacted at least 95% of Maximum Dry Density. Based on your finding, put your comment about the obtained result Table 2(a): Density test result Table 2(b): Moisture content test Bulk density, pb 1939.67 kg/m3 Mass of tray 1.65 g Mass of tray + soil Mass of tray + dry soil 2.65 g 2.50 g Maximum Dry Density (MDD) 1760.00 kg/m3 Laboratory compaction is required to determine the relation of density and moisture content for road base layer. According to the standard roadwork specification (JKR, 2008), compaction test must comply with B.S. 1377: 1990. Based on that standard procedure using modified rammer of 4.5 kg and 1 litre standard mould, prepared with 5 layers and compacted for 27 blowers/layer, determine the laboratory compaction effort (kJ/m³). (Assume accleration due to a gravity is 9.81 m/s?) Q3 If the blows of laboratory compaction increase to 50 blows/layer and the specimen diameter is 100 mm and 200 mm height, determine the compaction layer of the specimens. Based on your result, give your comment on the adequacy of compaction layer.
Transcribed Image Text:Q2 Sand cone replacement test method was conducted to determine the density during the construction of the road base layer. The result of the test is shown in Table 2(a) and 2(b). As a project engineer, you need to identify either the compaction effort for the construction of this road base layer comply or not to the Specifications of Roadwork by Public Work Department (JKR 2008). According to the road work specification (JKR 2008), the road base layer must be compacted at least 95% of Maximum Dry Density. Based on your finding, put your comment about the obtained result Table 2(a): Density test result Table 2(b): Moisture content test Bulk density, pb 1939.67 kg/m3 Mass of tray 1.65 g Mass of tray + soil Mass of tray + dry soil 2.65 g 2.50 g Maximum Dry Density (MDD) 1760.00 kg/m3 Laboratory compaction is required to determine the relation of density and moisture content for road base layer. According to the standard roadwork specification (JKR, 2008), compaction test must comply with B.S. 1377: 1990. Based on that standard procedure using modified rammer of 4.5 kg and 1 litre standard mould, prepared with 5 layers and compacted for 27 blowers/layer, determine the laboratory compaction effort (kJ/m³). (Assume accleration due to a gravity is 9.81 m/s?) Q3 If the blows of laboratory compaction increase to 50 blows/layer and the specimen diameter is 100 mm and 200 mm height, determine the compaction layer of the specimens. Based on your result, give your comment on the adequacy of compaction layer.
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