Q2Sand cone replacement test method was conducted to determine the density during theconstruction of the road base layer. The result of the test is shown in Table 2(a) and 2(b). As aproject engineer, you need to identify either the compaction effort for the construction of thisroad 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 becompacted at least 95% of Maximum Dry Density. Based on your finding, put your commentabout the obtained resultTable 2(a): Density test resultTable 2(b): Moisture content testBulk density, pb1939.67 kg/m3Mass of tray1.65 gMass of tray + soilMass of tray + dry soil2.65 g2.50 gMaximum Dry Density (MDD)1760.00 kg/m3Laboratory compaction is required to determine the relation of density and moisture content forroad base layer. According to the standard roadwork specification (JKR, 2008), compaction testmust comply with B.S. 1377: 1990. Based on that standard procedure using modified rammer of4.5 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 9.81m/s?)Q3If the blows of laboratory compaction increase to 50 blows/layer and the specimen diameter is100 mm and 200 mm height, determine the compaction layer of the specimens. Based on yourresult, give your comment on the adequacy of compaction layer.

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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

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Soil Compaction Test

Soil compaction is the major area of geotechnical engineering. Soil is composed of multiple pores present on its surface, while the soil is mainly composed of gravel, sand, rocks, etc. The arrangement of these rocks and gravels is such that they build up voids (spaces) between them, which allows spaces for the roots of the plants and crops to spread and absorb the required amount of nutrients. Soil compaction is a major problem primarily caused by human activities, micro-organisms, and other multiple factors.

Question

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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.

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