A Self-Learning Manual - Institution of Engineers Mauritius

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A Self-Learning Manual Mastering Different Fields of Civil Engineering Works (VC-Q&A Method) Vincent T. H. CHU 15. What are the problems associated with prestressed concrete piles (Daido)? (PCP1) The origin of Daido piles comes from Japan where these prestressed concrete piles are used as replacement plies. Holes are pre-formed in the ground and Daido piles are placed inside these pre-formed holes with subsequent grouting of void space between the piles and adjacent ground. However, in Hong Kong Daido piles are constructed by driving into ground by hammers instead of the originally designed replacement method. Since the installation method of Daido piles is changed, construction problems like deformation of pile tip shoes, crushing of concrete at pile tip etc. occur. Reference is made to B. W. Choy (1993). 240
A Self-Learning Manual Mastering Different Fields of Civil Engineering Works (VC-Q&A Method) Vincent T. H. CHU 7. Module Six: Roadworks Objectives Element Description Objective No. Bituminous Road Road Structure Roadbase RS1 Friction course RS2 Wearing course RS3 “Mortar mechanism” and “stone contact RS4 Bituminous Materials mechanism” SMA RS5 Anti-skid dressing RS6 Tar BM1 Aggregates, filler and binder BM2 Air void BM3 Construction Temperature C1 Compaction C2 Bleeding C3 Prime coat C4 Tack Coat C5 Concrete Road Construction Slump C1 Time to saw contraction joints C2 Pavement Structure Box-out C3 Reinforcement PS1 Joints PS2 Sub-base PS3 Priming coat PS4 Capping layer PS5 Separation membrane PS6 Lean concrete base PS7 Corners PS8 Test Ten percent fines value T1 Surface regularity test and sand patch test T2 Paving Blocks Structure Load transfer mechanism S1 241
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A Self-Learning Manual - Institution of Engineers Mauritius

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