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4 Cards in this Set
- Front
- Back
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process of quarrying (limestone)
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-long bladed diamond saw makes long cuts into solid rock
-closely spaced horizontal holes are drilled to create weakness -rubber bladders inserted into the saw kerfs & inflated causing slabs to break away -steel wedges are driven into separated slab causing it to split into smaller blocks -then labeled and stacked for shipping to the mill |
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process of sub grade preparation
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-site is cleared and grubbed
-organic top soil removed -subsoil or subgrade is excavated to required depth -then is graded level and compacted -proof rolling: a heavy roller makes passes over subgrade |
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process of tilt up construction
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-concrete wall panels are poured lying flat
-once panels have gained strength, they are lifter to final position -tilt up reduces formwork reduces formwork costs, which can account for 50% of the cost of concrete construction |
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process of casting hollow core planks
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-precast in casting beds 800ft or more in length
-tightly stretched pre-tensioned steel strands are strung the length of the bed and tensioned -weld plates, blockouts, lifting loops are added as needed -once cured to strength, the castings are cut into desired length -then lifted from casting bad and await shipping to site |
