1. Describe the process of laying PQC, including surface preparation, separation membrane placement, PQC spreading, paving, dowel bar placement, compaction, and batching plant requirements, while addressing potential issues like segregation, honeycombing, bleeding, and workability concerns.
2. PQC: Total thickness 300mm, M40 grade concrete, aggregate size 31.5mm. Texture strength of cement concrete 4.5 Mpa, compressive strength concrete after 28 days curing 40Mpa. Expansion joint provided dowel bar load transfer to one slab to another slab. Expansion joint thickness 25mm, water and dirt enter the joint, dowel bar affected by corrosion, and expected stress on the joint and resulting restrained movement. PVC dowel sheet size 34mm×100micron, dowel bar 32mm dia 500mm length plain bar. 330mm dowel bar full of greasing and PVC dowel sheet inserting. 130mm dowel bar epoxy coated. [Please provide a question related to this scenario.]
3. Given the weight of cement is 150kg per cubic meter, and if fly ash content exceeds 20%, the minimum cement content is 120kg per cubic meter. Five cube samples tested at 7 days achieve 10MPa compressive strength, but one sample after 7 days shows 7.5MPa compressive strength. The Dry Lean Concrete (DLC) mix in the pre-mix batching plant is homogeneous and uniform, and the DLC is transported covered by tarpaulin. DLC uses M15 grade concrete and a 12:1 aggregate cement ratio. Can you evaluate these statements?
4. What are cross-sections and longitudinal sections?
5. How do you draw contours in AutoCAD Civil 3D?