Question

1. (a) Briefly describe what is meant by the terms compaction and consolidation [5 marks] (b) In a standard B.S. compaction test, the following data was collected Moisture Content Bulk Density (Mg/m3) 1.87 2.04 2.13 2.20 2.16 2.09 $$5 8 10 13 16 19 Particle specific gravity 2.7 (i)Use a graph to find the maximum dry density and optimum moisture content of the soil shown above [10 marks] (ii) On the same graph, plot the zero and 5% air void lines [6 marks] (iii) Determine the air void content at maximum dry density [4 marks] Remember: Density of Water 1.0 Mg/m3.

Answer 1

Date. paction It i a Sudden ss 어 decH ease tn the volume ecess e air between thevoids the apphicatis Loads duallyー-decrement- Consolida hon → It is gra n the velume of Soril exhul sib ie-adilustment duetu bsne water and tastc SoilSoridshnen Static lsadiu beniod cess Stants after a Very Constlidatioh Cemhachish in volume-durin,-(ampacho And change > tage is to Conselidation

Date 813965 귀| 89ィ| 8 구 Day Density 会>- ) 边e 4 Content W. ) % -22222 Den sity Y b) I78 2 16 o 9 Plotting above data ! I Vu -> hn 3 l-与 13/